A water turbine rotating speed detection device

Abstract

The present application relates to the technical field of rotational speed detection, and particularly relates to a water turbine rotational speed detection device, which comprises a fixed plate, a first arc-shaped cover and the like; the first arc-shaped cover is arranged on the fixed plate. The present application realizes the continuous change of the angle at which the silt and gravel rush to the water turbine through the overlapping area of the second drainage groove and the first drainage groove by rotating the adjusting cover, thereby changing the angle at which the silt and gravel impact the water turbine, and further detecting the rotational speed of the water turbine under the impact of silt and gravel at multiple angles, so that the detection data is more accurate. The storage cavity is divided into four separate chambers by the blocking rod, so that the silt, gravel and clean water rush to the water turbine from the four chambers separately, thereby simulating the influence of the uneven distribution of gravel and silt in water on the rotational speed of the water turbine. The opposite sides of each adjacent two scraping strips are arranged in an inclined shape, so that the scraping strips scrape off the gravel adhered to the inner wall of the second arc-shaped cover, preventing the adjusting cover from being stuck by the gravel during the rotation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of rotating speed detection, and particularly relates to a water turbine rotating speed detection and speed measurement device. BACKGROUND

[0002] The water turbine is used for converting the rotating mechanical energy generated by water flow impact into electric energy. Before the water turbine is put into use, the rotating speed of the water turbine under different water flow impact forces is simulated to provide alarm or monitoring data for rotating speed abnormalities (too high or too low). However, when the water turbine is detected, the existing method only directly impacts the water flow to the water turbine blades to make them rotate, and then uses a rotating speed sensor to detect the data. However, the actual use scene is not considered, that is, the water contains impurities such as sand and silt. When the sand randomly hits different blades, it will cause uneven load distribution between the blades, which will affect the stability and rotating speed. At the same time, the silt is easy to adhere to the water turbine blades, which will also affect the water turbine blades, resulting in inaccurate detection of the rotating speed of the water turbine.

[0003] At the same time, only by impacting the water turbine blades with silt and sand, due to the uneven distribution of silt and sand in the water in the actual use scene, the impact area of the water turbine blades is also irregular, so that the rotating speed of the water turbine under the impact of unevenly distributed silt and sand in the water cannot be detected, resulting in inaccurate detection data. SUMMARY

[0004] In order to solve the above problems existing in the prior art, the purpose of the present application is to provide a water turbine rotating speed detection and speed measurement device, which considers the influence of sand and silt on the rotating speed of the water turbine to improve the data accuracy.

[0005] The technical solution adopted by the present application is as follows:

[0006] A water turbine rotating speed detection and speed measurement device, comprising a fixed plate and a first arc-shaped cover; the fixed plate is provided with the first arc-shaped cover; further comprising a drainage assembly, a second arc-shaped cover, an adjusting cover and a drainage pipe; the fixed plate is provided with the drainage assembly simulating the actual use scene of the water turbine; the drainage assembly is provided with the second arc-shaped cover; the second arc-shaped cover is provided with a plurality of first drainage grooves; the second arc-shaped cover is internally provided with a storage cavity, and each first drainage groove is in communication with the storage cavity; the storage cavity is slidably connected with the adjusting cover changing the impact angle of silt and sand; the adjusting cover is provided with a plurality of second drainage grooves; the second arc-shaped cover is connected with the drainage pipe, and the drainage pipe is connected with an external water pumping device.

[0007] As a preferred scheme of the present application, the drainage assembly comprises electric push rods, a support plate, a connecting plate, a sleeve ring, sand discharge pipes and a second water pipe; the support plate is fixedly connected with the electric push rods; the connecting plate is fixedly connected with the telescopic parts of the electric push rods; the support plate is fixedly connected with the electric push rods; the sleeve ring is fixedly connected with the connecting plate, and a rotating speed sensor is arranged in the sleeve ring; the connecting plate is fixedly connected with the sand discharge pipes which simulate the sand and gravel impact water turbine; each sand discharge pipe is connected with an external water pumping device; and the second arc-shaped cover is communicated with a water outlet pipe.

[0008] As a preferred scheme of the present application, the adjusting cover is further provided with scraping strips; each side of each second drainage groove of the adjusting cover is fixedly connected with the scraping strips which prevent the sand and gravel from being stuck in the adjusting cover; and each scraping strip is provided in an inclined shape.

[0009] As a preferred scheme of the present application, the adjusting cover is further provided with blocking rods; the adjusting cover is fixedly connected with the blocking rods which simulate the uneven sand and gravel impact on the water turbine; and each blocking rod is attached to the inner wall of the storage cavity.

[0010] As a preferred scheme of the present application, the first drainage groove has the minimum drainage capacity when the upper side or the lower side of the first drainage groove coincides with the second drainage groove.

[0011] As a preferred scheme of the present application, each blocking rod is provided in an inclined shape.

[0012] As a preferred scheme of the present application, each scraping strip is made of rubber.

[0013] As a preferred scheme of the present application, the adjusting cover is further provided with guide plates; the second arc-shaped cover is provided with water outlets; and the second arc-shaped cover is fixedly connected with the guide plates which make the sand and gravel impact on the water turbine in a transverse direction.

[0014] As a preferred scheme of the present application, the adjusting cover is further provided with top rods and brush plates; the adjusting cover is fixedly connected with the top rods; and each guide plate is slidably connected with the brush plate which facilitates the cleaning of the water turbine.

[0015] As a preferred scheme of the present application, each guide plate is provided in an arc shape towards the water flow impact.

[0016] The present application has the following advantages:

[0017] 1. The present application changes the angle at which the sand and gravel impact on the water turbine by rotating the adjusting cover, thereby changing the angle at which the sand and gravel impact on the water turbine, and detecting the rotating speed of the water turbine under the impact of the sand and gravel at various angles, so that the detection data is more accurate.

[0018] 2. The application divides the storage cavity into four separate chambers by the blocking rod, so that the silt, sand and clean water are separately flushed from the four chambers to the water turbine, thereby simulating the effect of uneven distribution of sand and silt in water on the rotating speed of the water turbine.

[0019] 3. The application sets the opposite sides of each adjacent two scraping strips to be inclined, so that the scraping strips adhere to the inner wall of the second arc-shaped cover to remove the sand adhered to the inner wall, preventing the sand from being stuck in the rotating process of the adjusting cover.

[0020] 4. The application sets the blocking rod to be inclined, so that the silt and sand in the storage cavity flow upward along the inclined surface of the blocking rod during rotation, driving the silt and sand to be lifted, preventing the silt and sand from accumulating in the storage cavity, and improving the processing capacity of the device for sand and silt.

[0021] 5. The application limits the silt and sand to be flushed to the blades of the water turbine in a horizontal manner through the guidance of the guide plate, thereby simulating the scenario of the water turbine being impacted by water flow in a horizontal state, so that the device is suitable for detecting water turbines with different installation modes.

[0022] 6. The application improves the cleaning effect of the water turbine blades through the brushing work of the brush plate on the edges of the water turbine blades, thereby reducing the labor cost without the need for workers to clean the water turbine again. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a three-dimensional structure schematic diagram of the water turbine rotating speed detection and speed measurement device of the application;

[0024] Figure 2 is a three-dimensional structure schematic diagram of the second arc-shaped cover and the adjusting cover from a first perspective of the application;

[0025] Figure 3 is an exploded view of the second arc-shaped cover and the adjusting cover of the application;

[0026] Figure 4 is a three-dimensional structure schematic diagram of the second arc-shaped cover and the adjusting cover from a second perspective of the application;

[0027] Figure 5 is a top view of the adjusting cover of the application;

[0028] Figure 6 is a three-dimensional structure schematic diagram of the top rod and the guide plate combination of the application;

[0029] Figure 7 is a three-dimensional structure schematic diagram of the guide plate and the brush plate combination of the application.

[0030] In the figure: 1-fixed plate; 2-first curved cover; 3-second curved cover; 3001-storage chamber; 3002-first drainage trough; 3003-water outlet; 4-turbine; 5-adjusting cover; 5001-second drainage trough; 6-drain pipe; 101-electric push rod; 102-support plate; 103-connecting plate; 104-ring; 105-sand discharge pipe; 106-water outlet pipe; 107-electric slider; 108-scraper; 109-blocking rod; 201-top rod; 202-guide plate; 203-brush plate. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features therein may be combined with each other unless there is a conflict.

[0033] Example 1

[0034] like Figures 1-5 As shown, a turbine speed detection and measurement device includes a fixed plate 1 and a first arc cover 2; the first arc cover 2 is provided on the fixed plate 1;

[0035] It also includes a drainage component, a second curved cover 3, an adjustment cover 5 and a drainage pipe 6; a drainage component is installed on the fixed plate 1; a second curved cover 3 is provided on the drainage component; four first drainage grooves 3002 are provided on the second curved cover 3; a storage cavity 3001 is provided inside the second curved cover 3, and each first drainage groove 3002 is connected to the storage cavity 3001; an adjustment cover 5 is slidingly connected in the storage cavity 3001; four second drainage grooves 5001 are provided on the adjustment cover 5; a drainage pipe 6 is connected to the second curved cover 3, and the drainage pipe 6 is connected to an external water pumping device.

[0036] The drainage assembly includes an electric push rod 101, a support plate 102, a connecting plate 103, a collar 104, a sand discharge pipe 105 and a second water pipe; a number of electric push rods 101 are fixed to the fixed plate 1; the telescopic parts of a number of electric push rods 101 are commonly fixed to the connecting plate 103; a number of electric push rods 101 are commonly fixed to the support plate 102; a collar 104 is fixed to the connecting plate 103, and a speed sensor is provided in the collar 104; four sand discharge pipes 105 are fixed to the connecting plate 103; each sand discharge pipe 105 is connected to an external water pumping device; the lower side of the second arc cover 3 is connected to a water outlet pipe 106.

[0037] It also includes a scraper 108; each side of the second drainage groove 5001 on the adjustment cover 5 is fixed with two scraper strips 108; the facing sides of each two adjacent scraper strips 108 are set to be inclined.

[0038] It also includes a blocking rod 109; four blocking rods 109 are fixedly connected to the adjustment cover 5; each blocking rod 109 is in contact with the inner wall of the storage cavity 3001.

[0039] It also includes an electric slider 107; the electric slider 107 is slidably connected to the storage cavity 3001 of the second arc-shaped cover 3; the upper side of the electric slider 107 is fixedly connected to the adjustment cover 5; the electric slider 107 rotates along the storage cavity 3001, thereby driving the adjustment cover 5 to rotate.

[0040] When the upper or lower side of the first drainage groove 3002 overlaps with the second drainage groove 5001 , the drainage volume is minimum, which changes the amount of water rushing to the turbine 4 , thereby detecting the rotation speed of the turbine 4 under the impact of water flow of different intensities.

[0041] Each blocking rod 109 is arranged in an inclined shape.

[0042] Each scraper 108 is made of rubber to prevent the scraper 108 from causing scratches or other damage during the cleaning process of the second arc-shaped cover 3, thereby extending the service life of the equipment.

[0043] Before testing, first move the turbine 4 to the top of the first arc cover 2 and stop, then fix the turbine 4 housing with bolts, and then start the electric push rod 101 to retract, thereby driving the connecting plate 103 as shown in the figure. Figure 1 Descend to Figure 2 As shown, the collar 104 and the drain pipe 6 are driven to move downward, and the collar 104 is sleeved on the bearing above the turbine 4. Finally, water is pumped into the drain pipe 6 by an external water pumping device. Under the restriction of the second arc cover 3, the water is discharged directly to the turbine 4 through the drain pipe 6. The water impacts the blades of the turbine 4, causing them to rotate. The speed sensor provided in the collar 104 detects the speed change of the turbine 4 under the impact of the water flow, and finally the water flows to the first arc cover 2 and is discharged by the outlet pipe 106 for reuse.

[0044] When the actual use scene of the simulation water turbine 4 is impacted by the change of the rotation speed of the water flow, since the water flow impacting the water turbine 4 contains impurities such as sand and soil in the actual scene, when the content of sand and soil in the water is too much, the sand randomly impacts different blades, which causes uneven load distribution between the blades, and this imbalance affects the stability and rotation speed, and the mud is easy to adhere to the blades of the water turbine 4, which also affects the water turbine 4, at this time, the sand and soil are poured into the sand discharge pipe 105 through the external water pumping device, and the clean water discharged from the drain pipe 6 cooperates to impact the water turbine 4, so that the water turbine 4 is not only impacted by the water flow, but also simulates the rotation speed of the water turbine 4 under the condition of sand impact and mud adhesion in the actual use scene, so that the detected data is more in line with the actual situation.

[0045] At the same time, since the sand and soil are not evenly distributed in the water, and the angle of the sand and soil impacting the blades of the water turbine 4 is also different, and the sand and soil is poured into the blades of the water turbine 4 through the sand discharge pipe 105, which cannot simulate the rotation speed of the water turbine 4 after being impacted by the sand and soil at different angles, resulting in inaccurate data. In order to avoid this phenomenon, the adjusting cover 5 is arranged in the storage cavity 3001, when the sand and soil is stored in the storage cavity 3001, since the adjusting cover 5 is added, the sand and soil needs to pass through the overlapping area of the first drain groove 3002 and the second drain groove 5001 to the water turbine 4, from the top to the bottom as the reference, the electric sliding block 107 is started to reciprocate clockwise and counterclockwise, and then drives the adjusting cover 5 to rotate, so that the overlapping area of the second drain groove 5001 and the first drain groove 3002 changes, and then the overlapping area of the second drain groove 5001 and the first drain groove 3002 changes along the first drain groove 3002, so that the angle of the water impacting the water turbine 4 through the overlapping area of the second drain groove 5001 and the first drain groove 3002 changes, and then the rotation speed of the water turbine 4 is monitored by the rotation speed sensor in the sleeve ring 104 at any time, and then the rotation speed of the water turbine 4 under the impact of sand and soil at different angles is detected, so that the data detected by the device is more accurate.

[0046] It is also considered that due to the uneven distribution of sand and silt in water in the actual use scene of the water turbine 4, the impact of sand and the adhesion of silt on the water turbine 4 are also uneven, in order to expand the simulation of the speed of the water turbine 4 in the above scene, one of the four sand discharge pipes 105 is only connected to clean water, and the other three sand discharge pipes 105 are connected to turbid water containing sand and silt, at this time, the storage cavity 3001 is divided into four separate cavities by the stop rod 109, so that the clean water does not mix after entering the storage cavity 3001, and the sand, silt and clean water separately pass through the overlapping area of the first drain groove 3002 and the second drain groove 5001 to the water turbine 4, thereby simulating the influence of uneven distribution of sand and silt in water on the speed of the water turbine 4.

[0047] In the above process, sand and silt are also easy to accumulate in the storage cavity 3001, and when sand and silt adhere to the storage cavity 3001, the rotation of the adjusting cover 5 is easy to cause sand to be stuck between the second drain groove 5001 and the first drain groove 3002, causing the adjusting cover 5 to be stuck, in order to avoid this phenomenon, when the adjusting cover 5 is rotating, the opposite sides of each adjacent two scraping strips 108 are arranged in an inclined shape, so that the scraping strips 108 adhere to the inner wall of the second arc-shaped cover 3 to remove the sand adhered to the inner wall, preventing the adjusting cover 5 from being stuck during the rotating process, at the same time, in order to facilitate subsequent detection of new water turbines 4, the water in the sand discharge pipe 105 is filled with clean water by starting the external water pumping device, and the storage cavity 3001 and the water turbine 4 are washed, the residual sand and silt during detection are washed away by the clean water and discharged to the first arc-shaped cover 2, and finally discharged through the water outlet pipe 106, during the washing process, the adjusting cover 5 is counterclockwise rotated by starting the electric sliding block 107, and the stop rod 109 is slid along the inner wall of the second arc-shaped cover 3, thereby scraping the residual sand and silt in the second arc-shaped cover 3, and finally the scraped sand and silt are discharged through the overlapping area of the first drain groove 3002 and the second drain groove 5001, at the same time, since the stop rod 109 is arranged in an inclined shape, the water in the storage cavity 3001 flows upward along the inclined surface of the stop rod 109 during the rotating process, thereby lifting the silt and sand, preventing the silt and sand from accumulating in the storage cavity 3001, and improving the processing capacity of the device for sand and silt.

[0048] Embodiment 2

[0049] Based on embodiment 1, as shown in Figure 1 , Figure 6 and Figure 7 , it further includes a guide plate 202, four water outlets 3003 are arranged on the second arc-shaped cover 3, and four guide plates 202 are fixedly connected to the inner side of the second arc-shaped cover 3.

[0050] Further comprising top rods 201 and brush plates 203; four top rods 201 are fixedly connected to the upper side of the adjusting cover 5; each guide plate 202 is slidably connected with a brush plate 203 on the upper side.

[0051] Each guide plate 202 is provided with an arc shape towards the water flow impact, avoiding the water flow from forming too much backflow when impacting the guide plate 202, and ensuring that the water flow is normally discharged along the surface of the guide plate 202.

[0052] Since the existing water turbine 4 installation mode is roughly divided into vertical and horizontal two kinds, and the angle of the adjusting cover 5 is adjusted by rotating to simulate the water flow impacting the water turbine 4 at different angles, only the vertical water turbine 4 installation mode can be detected, in order to make the detection mode of the device more comprehensive and diversified, and taking the view from top to bottom as the reference, the adjusting cover 5 is driven counterclockwise by the electric sliding block 107, when the second drainage groove 5001 overlaps with the water outlet 3003, at this time, the second drainage groove 5001 is completely separated from the first drainage groove 3002, and then the sand and gravel in the storage cavity 3001 are discharged through the overlapping area of the second drainage groove 5001 and the water outlet 3003, and the discharged sand and gravel are guided and limited by the guide plate 202, so that the sand and gravel impact the blades of the water turbine 4 in a horizontal manner, and then the scene of the water turbine 4 being impacted by the sand and gravel in a horizontal state is simulated, and finally the rotation speed data of the water turbine 4 is detected by the rotation speed sensor in the sleeve ring 104, so that the device is adapted to the water turbine 4 with different installation modes, and the detection of the device is more comprehensive and diversified.

[0053] It is also considered that when the water turbine 4 detection is completed, since the edge of the water turbine 4 blade is the water flow separation area in the rotating process of the water turbine 4, turbulence and vortex are easily formed, and impurities are easily accumulated, in order to facilitate cleaning of the sand and gravel adhered to the edge of the water turbine 4 blade, the adjusting cover 5 is driven counterclockwise by the electric sliding block 107 again after the second drainage groove 5001 overlaps with the water outlet 3003, and then the top rod 201 extrudes the brush plate 203, so that the brush plate 203 moves towards the water turbine 4, and is attached to the edge of the water turbine 4 blade, when the water flow is sprayed from the overlapping area of the second drainage groove 5001 and the water outlet 3003, the water flow impacts the water turbine 4 to make it rotate, and the brush plate 203 also performs brushing work on the edge of the water turbine 4 blade, thereby improving the cleaning effect of the water turbine 4 blade, and subsequent workers do not need to clean the water turbine 4 again, thereby reducing labor cost.

[0054] The present application is not limited to the above-mentioned optional embodiments, and anyone can derive other various forms of products under the inspiration of the present application, but regardless of any changes in shape or structure, any technical solutions falling within the scope defined by the claims of the present application fall within the protection scope of the present application.

Claims

1. A turbine speed detection and measurement device, comprising a fixed plate (1) and a first arc-shaped cover (2); the first arc-shaped cover (2) is provided on the fixed plate (1); and is characterized in that: The invention also comprises a drainage assembly, a second arc-shaped cover (3), an adjustment cover (5) and a drainage pipe (6); a drainage assembly simulating the actual use scene of the turbine (4) is installed on the fixed plate (1); a second arc-shaped cover (3) is provided on the drainage assembly; a plurality of first drainage grooves (3002) are provided on the second arc-shaped cover (3); a storage cavity (3001) is provided inside the second arc-shaped cover (3), and each first drainage groove (3002) is connected to the storage cavity (3001); an adjustment cover (5) for changing the impact angle of mud and gravel is slidably connected in the storage cavity (3001); a plurality of second drainage grooves (5001) are provided on the adjustment cover (5); a drainage pipe (6) is connected to the second arc-shaped cover (3), and the drainage pipe (6) is connected to an external water pump device.

2. The turbine speed detection and measurement device according to claim 1, characterized in that: The drainage assembly comprises an electric push rod (101), a support plate (102), a connecting plate (103), a collar (104), a sand discharge pipe (105) and a second water pipe; a plurality of electric push rods (101) are fixedly connected to the fixed plate (1); the telescopic parts of the plurality of electric push rods (101) are fixedly connected to the connecting plate (103); the plurality of electric push rods (101) are fixedly connected to the support plate (102); the collar (104) is fixedly connected to the connecting plate (103), and a speed sensor is arranged in the collar (104); a plurality of sand discharge pipes (105) for simulating sand and mud impacting the turbine (4) are fixedly connected to the connecting plate (103); each sand discharge pipe (105) is connected to an external water pump device; and the lower side of the second arc cover (3) is connected to a water outlet pipe (106).

3. The turbine speed detection and measurement device according to claim 1, characterized in that: It also includes scrapers (108); each second drainage groove (5001) on the adjustment cover (5) is fixedly connected to the side of a plurality of scrapers (108) for preventing sand and gravel from getting stuck in the adjustment cover (5); and the facing sides of each two adjacent scrapers (108) are arranged in an inclined shape.

4. The turbine speed detection and measurement device according to claim 3, characterized in that: It also includes a baffle (109); a plurality of baffles (109) are fixedly connected to the regulating cover (5) to simulate the turbine (4) being impacted by uneven sand and gravel; each baffle (109) is in contact with the inner wall of the storage chamber (3001).

5. The turbine speed detection and measurement device according to claim 3, characterized in that: The drainage volume is minimum when the upper side or the lower side of the first drainage groove (3002) overlaps with the second drainage groove (5001).

6. The turbine speed detection and measurement device according to claim 4, characterized in that: Each blocking rod (109) is arranged in an inclined shape.

7. The turbine speed detection and measurement device according to claim 3, characterized in that: Each scraper (108) is made of rubber.

8. The device for detecting and measuring the rotational speed of a hydraulic turbine according to claim 2, characterized in that: The invention also includes a guide plate (202); a plurality of water outlets (3003) are provided on the second arc-shaped cover (3); and a plurality of guide plates (202) are fixedly connected to the inner side of the second arc-shaped cover (3) so that mud, sand and gravel can impact the turbine (4) laterally.

9. The device for detecting and measuring the rotational speed of a hydraulic turbine according to claim 4, characterized in that: It also includes a push rod (201) and a brush plate (203); a plurality of push rods (201) are fixedly connected to the upper side of the adjustment cover (5); and a brush plate (203) is slidably connected to the upper side of each guide plate (202) for facilitating cleaning of the turbine (4).

10. The turbine speed detection and measurement device according to claim 9, characterized in that: The side of each guide plate (202) facing the impact of the water flow is arranged in an arc shape.

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