Water turbine rotating speed detection and speed measurement device

Abstract

The invention relates to the technical field of rotating speed detection, in particular to a water turbine rotating speed detection and speed measurement device which comprises a fixing plate, a first arc-shaped cover and the like. And a first arc-shaped cover is arranged on the fixed plate. According to the invention, by rotating the adjusting cover, the angles of silt and gravel rushing to the water turbine through the overlapped area of the second drainage groove and the first drainage groove are continuously changed, so that the angles of the silt and gravel rushing to the water turbine are changed, and the rotating speed of the water turbine under the impact of the silt and gravel at various angles is detected; the detection data is more accurate; the storage cavity is divided into four independent chambers through the stop levers, so that silt, sand and sand and clear water are flushed to the water turbine from the four chambers independently, and the influence of non-uniform distribution of the sand and sand in water on the rotating speed of the water turbine is further simulated; the opposite sides of every two adjacent scraping strips are arranged to be inclined, so that the scraping strips are attached to the inner wall of the second arc-shaped cover to shovel away gravel attached to the inner wall of the second arc-shaped cover, and the adjusting cover is prevented from being clamped by the gravel in the rotating process.

Description

Technical Field

[0001] The invention belongs to the technical field of rotation speed detection, and in particular relates to a rotation speed detection and measuring device for a water turbine. Background Art

[0002] A water turbine is used to convert the rotational mechanical energy generated by the impact of water flow into electrical energy. Before the water turbine is put into use, the rotational speed of the water turbine under different water flow impact forces is simulated to provide alarm or monitoring data for abnormal rotational speed (too high or too low). When testing the water turbine, the existing method only directly rushes water to the turbine blades to make them rotate, and then uses the speed sensor to detect the data. It does not take into account the actual use scenario. The water may contain impurities such as sand and mud. When the sand and gravel randomly hit different blades, it will cause uneven load distribution between the blades. This imbalance will affect its stability and rotational speed. At the same time, mud and sand are easy to adhere to the turbine blades, causing the turbine blades to be affected as well, resulting in inaccurate data for detecting the turbine speed.

[0003] At the same time, the turbine blades are impacted only by discharging mud, sand and gravel. In actual usage scenarios, the mud, sand and gravel are unevenly distributed in the water, resulting in irregular impact areas on the turbine blades. As a result, the rotation speed of the turbine under the impact of the unevenly distributed mud, sand and gravel in the water cannot be detected, resulting in inaccurate detection data. Summary of the invention

[0004] In order to solve the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a turbine speed detection and measuring device, which takes into account the influence of sand and mud on the turbine speed in actual use scenarios to improve data accuracy.

[0005] The technical solution adopted by the present invention is:

[0006] A turbine speed detection and speed measuring device comprises a fixed plate and a first arc cover; the first arc cover is arranged on the fixed plate; it also comprises a drainage assembly, a second arc cover, an adjusting cover and a drainage pipe; a drainage assembly simulating the actual use scenario of the turbine is installed on the fixed plate; the second arc cover is arranged on the drainage assembly; a plurality of first drainage grooves are provided on the second arc cover; a storage cavity is provided inside the second arc cover, and each first drainage groove is connected to the storage cavity; an adjusting cover for changing the impact angle of mud and gravel is slidably connected in the storage cavity; a plurality of second drainage grooves are provided on the adjusting cover; a drainage pipe is connected to the second arc cover, and the drainage pipe is connected to an external water pumping device.

[0007] As a preferred embodiment of the present invention, the drainage assembly includes an electric push rod, a support plate, a connecting plate, a ring, a sand discharge pipe and a second water pipe; a plurality of electric push rods are fixedly connected to the fixed plate; a plurality of telescopic parts of the electric push rods are commonly fixedly connected to the connecting plate; a plurality of electric push rods are commonly fixedly connected to the support plate; a ring is fixedly connected to the connecting plate, and a speed sensor is arranged inside the ring; a plurality of sand discharge pipes simulating the impact of sand and mud on the turbine are fixedly connected to the connecting plate; each sand discharge pipe is connected to an external water pumping device; and a water outlet pipe is connected to the lower side of the second arc cover.

[0008] As a preferred solution of the present invention, it also includes scraping strips; each side of the second drainage groove on the adjustment cover is fixedly connected with a plurality of scraping strips to prevent the sand and stone from getting stuck in the adjustment cover; and the facing sides of each two adjacent scraping strips are arranged in an inclined shape.

[0009] As a preferred solution of the present invention, it also includes a baffle rod; a plurality of baffle rods simulating the uneven impact of sand and gravel on the turbine are fixedly connected to the adjustment cover; each baffle rod is in contact with the inner wall of the storage chamber.

[0010] As a preferred embodiment of the present invention, the drainage volume is minimum when the upper side or the lower side of the first drainage groove overlaps with the second drainage groove.

[0011] As a preferred solution of the present invention, each barrier rod is arranged in an inclined shape.

[0012] As a preferred solution of the present invention, each scraper strip is made of rubber.

[0013] As a preferred solution of the present invention, it also includes a guide plate; a plurality of water outlets are provided on the second arc cover; a plurality of guide plates are fixedly connected to the inner side of the second arc cover for causing mud, sand and gravel to impact the turbine laterally.

[0014] As a preferred solution of the present invention, it also includes a push rod and a brush plate; a plurality of push rods are fixedly connected to the upper side of the adjustment cover; and a brush plate for cleaning the turbine is slidably connected to the upper side of each guide plate.

[0015] As a preferred solution of the present invention, a side of each guide plate facing the impact of the water flow is arranged in an arc shape.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention realizes that by rotating the adjusting cover, the angle at which the mud and gravel rush toward the turbine through the overlapping area of ​​the second drainage groove and the first drainage groove is continuously changed, thereby changing the angle at which the mud and gravel impact the turbine, and then detecting the rotation speed of the turbine under the impact of mud and gravel at various angles, making the detection data more accurate.

[0018] 2. The present invention divides the storage chamber into four separate chambers by means of a baffle rod, so that mud, gravel and clean water rush toward the turbine from the four chambers separately, thereby simulating the influence of uneven distribution of gravel and mud in water on the rotation speed of the turbine.

[0019] 3. The present invention sets the facing sides of each two adjacent scraping strips in an inclined shape, so that the scraping strips fit against the inner wall of the second arc-shaped cover to remove the sand and gravel adhering to the inner wall, thereby preventing the adjustment cover from being stuck by sand and gravel during the rotation process.

[0020] 4. The present invention sets the baffle rod in an inclined shape, so that during the rotation process, the mud and gravel in the storage chamber flow upward along the inclined surface of the baffle rod, driving the mud and gravel to be lifted up, preventing the mud and gravel from accumulating in the storage chamber, and improving the device's ability to handle gravel and mud.

[0021] 5. The present invention uses the guiding and limiting of the guide plate to make the mud and sand rush to the blades of the turbine in a horizontal manner, thereby simulating the scene of the turbine being impacted by water flow in a horizontal state, so that the device can be adapted to the detection of turbines with different installation methods.

[0022] 6. The present invention uses a brush plate to brush the edge of the turbine blade, thereby improving the cleaning effect of the turbine blade. There is no need for workers to clean the turbine separately again later, thus reducing labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the turbine speed detection and speed measuring device of the present invention;

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the second arc-shaped cover and the adjustment cover of the present invention at a first viewing angle;

[0025] Figure 3 It is an exploded view of the second arc cover and the adjustment cover of the present invention;

[0026] Figure 4 It is a schematic diagram of the second arc cover and the three-dimensional structure for adjusting the second viewing angle of the present invention;

[0027] Figure 5 A top view of the adjustment cover of the present invention;

[0028] Figure 6 It is a schematic diagram of the combined three-dimensional structure of the ejector rod and the guide plate of the present invention;

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

[0030] In the figure: 1-fixed plate; 2-first arc cover; 3-second arc 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 strip; 109-blocking rod; 201-top rod; 202-guide plate; 203-brush plate. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 here 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 merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0033] Example 1

[0034] like Figure 1-Figure 5 As shown, a turbine speed detection and speed measuring device comprises a fixing plate 1 and a first arc-shaped cover 2; the fixing plate 1 is provided with the first arc-shaped cover 2;

[0035] It also includes a drainage component, a second arc-shaped cover 3, an adjustment cover 5 and a drainage pipe 6; a drainage component is installed on the fixed plate 1; a second arc-shaped cover 3 is arranged on the drainage component; four 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 is slidably 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 arc-shaped 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 plurality of electric push rods 101 are fixedly connected to the fixed plate 1; the telescopic parts of a plurality of electric push rods 101 are commonly fixedly connected to the connecting plate 103; a plurality of electric push rods 101 are commonly fixedly connected to the support plate 102; a collar 104 is fixedly connected to the connecting plate 103, and a speed sensor is arranged in the collar 104; four sand discharge pipes 105 are fixedly connected to the connecting plate 103; each sand discharge pipe 105 is connected to an external water pumping device; a water outlet pipe 106 is connected to the lower side of the second arc cover 3.

[0037] It also includes a scraper strip 108; two scraper strips 108 are fixedly connected to the sides of each second drainage groove 5001 on the adjustment cover 5; and the facing sides of each two adjacent scraper strips 108 are arranged in an inclined shape.

[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, and then detects 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 material to prevent the scraper 108 from causing scratches or other damages during the cleaning process of the second arc-shaped cover 3, thereby extending the service life of the equipment.

[0043] Before testing, the turbine 4 is first moved to the top of the first arc cover 2 and then stopped. Then, the outer shell of the turbine 4 is fixed by bolts, and then the electric push rod 101 is started to contract, thereby driving the connecting plate 103 as shown in FIG. Figure 1 Down 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 through an external water pumping device. Under the restriction of the second arc cover 3, the water is directly discharged to the turbine 4 through the drain pipe 6. The water impacts the blades of the turbine 4 to cause 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. Finally, the water flows to the first arc cover 2 and is discharged by the outlet pipe 106 for reuse.

[0044] When simulating the speed change of the water turbine 4 under the impact of water flow in the actual use scenario, in the actual scenario, the water flow impacting the water turbine 4 contains impurities such as sand and soil. When the content of sand and soil in the water is too much, the sand and gravel randomly hit different blades, which will cause uneven load distribution between the blades. This imbalance will affect its stability and speed, and the mud and gravel are easy to adhere to the blades of the water turbine 4, causing the water turbine 4 to be affected as well. At this time, mud and gravel are poured into the sand discharge pipe 105 through an external water pumping device, so that they cooperate with the clean water discharged from the drainage pipe 6 to rush towards the water turbine 4, so that the water turbine 4 is not only impacted by the water flow, but also simulates the speed of the water turbine 4 under the impact of sand and gravel and mud adhesion in the actual use scenario, so that the detected data is more in line with reality.

[0045] At the same time, due to the uneven distribution of silt and gravel in the water, the angles at which the unevenly distributed silt and gravel rush toward the turbine 4 blades are also different. The silt and gravel are discharged to the turbine 4 blades through the sand discharge pipe 105 alone, which cannot simulate the rotation speed of the turbine 4 blades after being impacted by silt and gravel at different angles, resulting in inaccurate data. In order to avoid this phenomenon, an adjustment cover 5 is provided in the storage chamber 3001. When the silt and gravel are stored in the storage chamber 3001, due to the addition of the adjustment cover 5, the silt and gravel need to be discharged to the turbine 4 through the overlapping area of ​​the first drainage groove 3002 and the second drainage groove 5001. Based on the view from top to bottom, the electric slider 1 is started. 07 reciprocates in clockwise and counterclockwise rotation, thereby driving the adjustment cover 5 to rotate, so that the overlapping area of ​​the second drainage groove 5001 and the first drainage groove 3002 changes, and then the overlapping area of ​​the second drainage groove 5001 and the first drainage groove 3002 changes up and down along the first drainage groove 3002, so that the angle at which water rushes to the turbine 4 through the overlapping area of ​​the second drainage groove 5001 and the first drainage groove 3002 is constantly changing, thereby changing the angle at which mud and gravel impact the turbine 4. At this time, the speed sensor in the ring 104 monitors the speed of the turbine 4 at all times, and then detects the speed of the turbine 4 under the impact of mud and gravel at different angles, so that the data detected by the device is more accurate.

[0046] It is also taken into consideration that, due to the uneven distribution of sand and silt in the water of the turbine 4 in actual use scenarios, the turbine 4 is also unevenly impacted by sand and silt and adhered to by silt. In order to expand the simulation of the rotation speed of the turbine 4 in the above scenario, one of the four sand discharge pipes 105 is only fed with clean water, while the other three sand discharge pipes 105 are fed with turbid water containing sand and silt. At this time, the storage chamber 3001 is divided into four separate chambers by the blocking rod 109, so that the clean water does not mix with each other after entering the storage chamber 3001, and the silt, sand and clean water are separately rushed to the turbine 4 from the four chambers through the overlapping area of ​​the first drainage groove 3002 and the second drainage groove 5001, thereby simulating the influence of the uneven distribution of sand and silt in the water on the rotation speed of the turbine 4.

[0047] In the above process, sand and silt are likely to accumulate in the storage chamber 3001. When sand and silt adhere to the storage chamber 3001, the rotation of the regulating cover 5 may easily cause the sand and silt to be stuck between the second drainage groove 5001 and the first drainage groove 3002, causing the regulating cover 5 to be stuck. In order to avoid this phenomenon, when the regulating cover 5 is rotating, the opposing sides of each two adjacent scraper strips 108 are arranged in an inclined state so that the scraper strips 108 are attached to the inner wall of the second arc-shaped cover 3 to remove the sand and silt adhered to the inner wall, thereby preventing the regulating cover 5 from being stuck by the sand and silt during the rotation process. At the same time, in order to facilitate the subsequent detection of the new turbine 4, the external water pumping device is started to pour clean water into the sand discharge pipe 105, so as to flush the storage chamber 3001 and the turbine 4, and remove the sand and silt remaining during the detection. The stones and mud are flushed by clean water and discharged to the first arc-shaped cover 2, and finally discharged through the water outlet pipe 106. During the flushing process, based on the view from top to bottom, the electric slider 107 is started to drive the adjustment cover 5 to rotate counterclockwise, thereby driving the baffle 109 to slide against the inner wall of the second arc-shaped cover 3, thereby scraping off the sand and mud remaining in the second arc-shaped cover 3, and finally the scraped sand and mud are discharged through the overlapping area of ​​the first drainage groove 3002 and the second drainage groove 5001. At the same time, since the baffle 109 is set to an inclined shape, during the rotation process, the water in the storage chamber 3001 flows upward along the inclined surface of the baffle 109, thereby driving the mud and sand to be lifted up, preventing the mud and sand from accumulating in the storage chamber 3001, thereby improving the device's ability to handle sand and mud.

[0048] Example 2

[0049] On the basis of Example 1, Figure 1 , Figure 6 and Figure 7 As shown, it also includes a guide plate 202; four water outlets 3003 are opened on the second arc cover 3; and four guide plates 202 are fixedly connected to the inner side of the second arc cover 3.

[0050] It also includes a push rod 201 and a brush plate 203; four 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.

[0051] The side of each guide plate 202 facing the water flow impact is configured to be in an arc shape to prevent the water flow from forming excessive backwash water flow when rushing toward the guide plate 202 , thereby ensuring that the water flow is discharged normally along the surface of the guide plate 202 .

[0052] Since the existing installation methods of the turbine 4 are roughly divided into two types: upright and horizontal, and the angle of the adjusting cover 5 is rotated to simulate the water flow impact on the turbine 4 at different angles, only the upright installation method of the turbine 4 can be detected. In order to make the detection method of the device more comprehensive and diversified, based on the view from top to bottom, the adjusting cover 5 is driven by the electric slider 107 to rotate counterclockwise. When the second drainage groove 5001 overlaps with the water outlet 3003, the second drainage groove 5001 is completely separated from the first drainage groove 3002, thereby making the storage The silt and gravel in the cavity 3001 are discharged through the overlapping area of ​​the second drain groove 5001 and the water outlet 3003, and the discharged silt and gravel are guided and restricted by the guide plate 202, so that the silt and gravel rush toward the blades of the turbine 4 in a horizontal manner, thereby simulating the scene of the turbine 4 being impacted by silt and gravel in a horizontal state. Finally, the speed data of the turbine 4 is detected by the speed sensor in the ring 104, so that the device can adapt to the detection of turbines 4 with different installation methods, and at the same time make the detection of the device more comprehensive and diversified.

[0053] It is also considered that after the inspection of the turbine 4 is completed, since the edge of the turbine 4 blade is the area where the water flow is separated during the rotation of the turbine 4, turbulence and eddy current are easily formed, causing impurities to accumulate here more easily. In order to facilitate the cleaning of sand and mud adhering to the edge of the turbine 4 blade, when the second drainage groove 5001 and the water outlet 3003 overlap, the electric slider 107 is driven again to drive the adjustment cover 5 to rotate counterclockwise for a distance, thereby driving the top rod 201 to squeeze the brush plate 203, so that the brush plate 203 moves toward the turbine 4 and fits the edge of the turbine 4 blade. When the water flow is ejected from the overlapping area of ​​the second drainage groove 5001 and the water outlet 3003, the water flow impacts the turbine 4 to cause it to rotate. While cleaning the turbine 4, the brush plate 203 also brushes the edge of the turbine 4 blade, thereby improving the cleaning effect of the turbine 4 blade. There is no need for workers to clean the turbine 4 separately again in the future, thereby reducing labor costs.

[0054] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A turbine speed detection and speed measuring device, comprising a fixed plate (1) and a first arc-shaped cover (2); the first arc-shaped cover (2) is arranged on the fixed plate (1); 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 water turbine (4) is installed on the fixed plate (1); a second arc-shaped cover (3) is arranged on the drainage assembly; a plurality of first drainage grooves (3002) are provided on the second arc-shaped cover (3); a storage chamber (3001) is provided inside the second arc-shaped cover (3), and each first drainage groove (3002) is connected to the storage chamber (3001); an adjustment cover (5) for changing the impact angle of mud and gravel is slidably connected inside the storage chamber (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. A turbine speed detection and speed measuring 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 commonly fixedly connected to the connecting plate (103); the plurality of electric push rods (101) are commonly fixedly connected to the support plate (102); the collar (104) is fixedly connected to the connecting plate (103), and a speed sensor is arranged inside the collar (104); a plurality of sand discharge pipes (105) 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 pumping device; and a water outlet pipe (106) is connected to the lower side of the second arc cover (3).

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

4. A turbine speed detection and measurement device according to claim 3, characterized in that: It also includes a baffle rod (109); a plurality of baffle rods (109) are fixedly connected to the adjustment cover (5) to simulate the uneven impact of sand and gravel on the water turbine (4); each baffle rod (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 is 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. A turbine speed detection and measurement device according to claim 4, characterized in that: Each blocking rod (109) is arranged in an inclined shape.

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

8. A turbine speed detection and measurement device according to claim 2, characterized in that: It 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. A turbine speed detection and measurement device 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. A turbine speed detection and measurement device according to claim 9, characterized in that: A side of each guide plate (202) facing the impact of the water flow is arranged in an arc shape.

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