Flow velocity measuring device for water conservancy and hydropower engineering

Abstract

The utility model discloses a flow velocity measuring device for water conservancy and hydropower engineering, which comprises a turbine shell, the lower end face of the turbine shell is connected with a floating seat through a plurality of first connecting rods, the lower end face of the floating seat is connected with a plurality of uniformly arranged stand columns, the upper end face of the turbine shell is jointly connected with a mounting frame through a plurality of telescopic assemblies, and a flow velocity meter is arranged at the center of the mounting frame. The upper end of the rotating shaft movably penetrates through the upper wall of the turbine shell to be connected with a rotating assembly, the other end of the rotating assembly movably penetrates through the mounting frame to be connected with an input shaft of the flow meter, a water inlet tank is arranged on the side wall of the turbine shell, and a filtering mechanism is arranged in the water inlet tank. And the upper end of the mounting frame is connected with a protective frame through a plurality of uniformly arranged second connecting rods. The flow velocity measuring device for water conservancy and hydropower engineering provided by the utility model solves the problem in the prior art that real-time adjustment cannot be carried out according to sundry conditions during protection.

Description

Technical Field

[0001] The utility model belongs to the technical field of flow velocity measurement, and in particular relates to a flow velocity measuring device used in water conservancy and hydropower engineering. Background Art

[0002] Water conservancy and hydropower engineering refers to the construction of corresponding facilities, such as hydroelectric power stations and pumping stations, based on demand, at specific locations and according to the flow rate of local rivers, and making full use of the flow rate of water. The principle of water flow measurement is to use a water flow velocity meter to measure the speed of water flow, and then convert the water flow rate according to the water flow velocity. The flow can be measured quickly, and the average horizontal flow rate of the river is measured according to the induction of the measuring rod to the water flow, and then the data is transmitted to the instrument through the sensor above the measuring rod. The instrument panel calculates the water flow velocity of this section. It is simple and convenient to use, but many flow velocity measurement devices currently have poor protection performance. During measurement, impurities will enter the equipment and damage the components, affecting the measurement results.

[0003] The Chinese utility model patent with application date of June 25, 2023 and announcement number: CN220040479U discloses a flow rate measuring device, which protects the internal measuring instrument by setting up a protective component and a protective box to prevent the water surface from colliding with external objects when moving, which will have a significant impact on the components of the water surface flow rate measuring instrument. By setting up a filter, it is convenient to filter the water entering the flow measuring tube. By starting the first electric push rod, the cleaning plate is driven to scrape off the blockage on the surface of the filter plate, and the water passing through the flow measuring tube is measured to avoid impurities affecting the measurement results.

[0004] However, the above device also has shortcomings: generally, the flow rate measurement is maintained for a long time, and the content of impurities in the water flow is also different, resulting in different speeds of accumulation of debris on the filter surface during the measurement process. When there are fewer debris in the water flow, the frequency of clogging caused by accumulation of debris on the filter surface is slower. Therefore, when the frequency of the first electric push rod pushing the cleaning plate remains unchanged, the first electric push rod will perform unnecessary extension and retraction movements, resulting in waste. Utility Model Content

[0005] The utility model aims to provide a flow velocity measuring device for water conservancy and hydropower engineering, which solves the problem that the prior art cannot make real-time adjustments according to the situation of debris during protection.

[0006] The technical solution adopted by the utility model is a flow velocity measuring device for water conservancy and hydropower engineering, comprising a turbine shell, the lower end face of the turbine shell is connected to a floating seat through a plurality of first connecting rods, the lower end face of the floating seat is connected to a plurality of evenly arranged columns, the upper end face of the turbine shell is connected to a mounting frame through a plurality of telescopic components, a flow meter is arranged at the center of the mounting frame, a rotating shaft is rotatably arranged at the center of the interior of the turbine shell, a plurality of evenly arranged turbine blades are arranged on the outer sleeve of the rotating shaft, the upper end of the rotating shaft movably penetrates the upper wall of the turbine shell and is connected to a rotating component, the other end of the rotating component movably penetrates the mounting frame and is connected to the input shaft of the flow meter, the side wall of the turbine shell is connected to a water inlet box, a filtering mechanism is arranged in the water inlet box, and the upper end of the mounting frame is connected to a protective frame through a plurality of evenly arranged second connecting rods.

[0007] The utility model is also characterized in that:

[0008] A plurality of telescopic components are evenly arranged along the circumference of the insert tube.

[0009] The telescopic assembly includes a screw rod, one end of which is connected to the turbine shell, a sleeve is provided on the outer movable sleeve of the screw rod, and the end of the sleeve away from the turbine shell is connected to the mounting frame, wherein two screw rods are externally threaded with nuts, the nuts are located below the sleeve, and the two nuts are symmetrically arranged about the rotating assembly.

[0010] The rotating assembly includes a plug post, a first end of the plug post is connected to the rotating shaft, a sleeve is provided on the outer sliding sleeve of the plug post, a plurality of slide grooves are provided on the outer side of the plug post along its longitudinal direction, a slider matching the slide groove is provided on the inner wall of the plug cylinder, the slider is slidably arranged in the corresponding slide groove, and the end of the plug cylinder away from the turbine shell is connected to the input shaft of the flow meter.

[0011] The filtering mechanism includes an elastic ring, an opening is provided on a side of the water inlet box away from the turbine shell, the elastic ring is arranged around the inner wall of the water inlet box opening, two U-shaped blocks are fitted on the side of the elastic ring close to the turbine shell, the openings of the two U-shaped blocks are opposite, a support rod is provided between the two U-shaped blocks, the two U-shaped blocks are respectively hinged on the support rod, the two U-shaped blocks are respectively connected to the filter screen on the side close to the turbine shell, the four corners of the inner wall of the water inlet box close to the turbine shell are respectively connected to the first electric push rod, the working ends of the first electric push rod all face the filter screen, two parallel connecting frames are arranged in the water inlet box, the two ends of the two connecting frames are respectively connected to the working ends of different first electric push rods, a second electric push rod matched with the support rod is fixed on the connecting frame, and the working end of the second electric push rod is connected to the support rod;

[0012] The four corners of the two U-shaped blocks are respectively connected with connecting columns, and a spring block is commonly connected between the two diagonal connecting columns. A pressure sensor is arranged on the inner wall of the water inlet tank.

[0013] The support rod is arranged parallel to the column, and the two connecting frames are arranged perpendicular to the support rod respectively.

[0014] The hinge between the two U-shaped blocks and the support rod is a one-way hinge.

[0015] The interior of the floating seat is hollow, and a filling port is arranged in the hollow.

[0016] The beneficial effects of the utility model are:

[0017] (1) The utility model provides a pressure sensor. When too much debris accumulates on the filter surface, it will be pushed inward by the water flow. The pressure sensor is squeezed by the elastic block to help judge the blockage degree of the filter. Then, the filter is pushed to reset by the connection frame. When the filter needs to be cleaned, the first electric push rod on the connection frame pushes the two U-shaped blocks into a folded shape, so that the blockage on the filter surface can be automatically cleaned under the flushing action of the water flow.

[0018] (2) When the column of the utility model is inserted into the water, a certain amount of water is added into the filling port, thereby changing the weight of the floating seat, and thus changing the buoyancy of the floating seat. When the column is inserted into the water, the depth of the floating seat in the water can be changed, and as the water level changes, the floating seat can be automatically raised and lowered by plugging the column and the floating seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the flow velocity measuring device of the utility model;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the turbine shell of the flow velocity measuring device of the utility model;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the telescopic component of the flow velocity measuring device of the utility model;

[0022] Figure 4 This utility model is a flow velocity measuring device Figure 2 Enlarged structural diagram at A in the middle.

[0023] In the figure, 1. turbine housing, 2. sleeve, 3. insert, 4. flow meter, 5. insert column, 6. nut, 7. mounting frame, 8. pressure sensor, 9. filter, 10. elastic ring, 11. U-shaped block, 12. floating seat, 13. column, 14. screw rod, 15. connecting column, 16. first electric push rod, 17. connecting frame, 18. spring block, 19. protective frame. DETAILED DESCRIPTION

[0024] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0025] Flow velocity measuring devices used in water conservancy and hydropower projects, such as Figure 1As shown, it includes a turbine shell 1, and the lower end surface of the turbine shell 1 is connected to a floating seat 12 through a plurality of first connecting rods. The interior of the floating seat 12 is hollow, and an injection port is provided in the hollow part. The lower end surface of the floating seat 12 is connected to a plurality of evenly arranged columns 13. Specifically, the columns 13 are inserted into water, and a certain amount of water is added to the injection port to change the weight of the floating seat 12, thereby changing the buoyancy of the floating seat 12. When the columns 13 are inserted into the water, the depth of the floating seat 12 in the water can be changed, and as the water level changes, the floating seat 12 can be automatically raised and lowered by plugging the columns 13 and the floating seat 12.

[0026] like Figure 2 As shown, the upper end surface of the turbine housing 1 is connected to the mounting frame 7 through a plurality of telescopic components, and the plurality of telescopic components are evenly arranged along the circumference of the insert 3, such as Figure 3 As shown, the telescopic assembly includes a screw rod 14, one end of which is connected to the turbine shell 1, and a sleeve 2 is provided on the outer movable sleeve of the screw rod 14. The end of the sleeve 2 away from the turbine shell 1 is connected to the mounting bracket 7, wherein two screw rods 14 are externally threaded with nuts 6, and the nuts 6 are located below the sleeve 2. The two nuts 6 are symmetrically arranged about the rotating assembly. By rotating the nuts 6, the sleeve 2 can drive the mounting bracket 7 and the flow meter 4 to rise and fall, thereby adjusting the distance between the flow meter 4 and the turbine shell 1 to ensure that when detecting the flow rate, the turbine shell 1 is located at a corresponding depth in the water, while the flow meter 4 is not in the water.

[0027] A velocity meter 4 is provided at the center of the mounting frame 7, a rotating shaft is rotatably provided at the center of the turbine shell 1, a plurality of uniformly arranged turbine blades are provided on the outer sleeve of the rotating shaft, an upper end of the rotating shaft movably penetrates the upper wall of the turbine shell 1 and is connected to a rotating assembly, the other end of the rotating assembly movably penetrates the mounting frame 7 and is connected to the input shaft of the velocity meter 4, a water inlet tank is connected to the side wall of the turbine shell 1, a filtering mechanism is provided in the water inlet tank, and a protective frame 19 is connected to the upper end of the mounting frame 7 through a plurality of uniformly arranged second connecting rods for protecting the velocity meter 4.

[0028] Among them, the rotating component includes a plug column 5, the first end of the plug column 5 is connected to the rotating shaft, and the plug cylinder 3 is slidably sleeved on the outside of the plug column 5. The specific sliding sleeve method is: a plurality of sliding grooves are provided on the outer side of the plug column 5 along its longitudinal direction, and a slider matching the sliding groove is provided on the inner wall of the plug cylinder 3. The slider is slidably set in the corresponding sliding groove. This structure ensures that the plug cylinder 3 can slide up and down along the plug column 5 and cannot rotate at will. The end of the plug cylinder 3 away from the turbine shell 1 is connected to the input shaft of the flow meter 4. According to the above description, by rotating the nut 6, the sleeve 2 can be moved up and down, and the plug cylinder 3 can move up and down accordingly, and can drive the flow meter 4 to rotate synchronously with the rotation of the turbine blades.

[0029] like Figure 4As shown, the filtering mechanism includes an elastic ring 10, an opening is provided on the side of the water inlet box away from the turbine shell 1, the elastic ring 10 is arranged around the inner wall of the water inlet box opening, and two U-shaped blocks 11 are fitted on the side of the elastic ring 10 close to the turbine shell 1, the openings of the two U-shaped blocks 11 are opposite, a support rod is provided between the two U-shaped blocks 11, the support rod is arranged parallel to the column 13, the two U-shaped blocks 11 are hinged on the support rod, and the two U-shaped blocks 11 are connected to the filter screen 9 on the side close to the turbine shell 1, respectively, and the first electric push rod 16 is connected to the four corners of the inner wall of the water inlet box close to the turbine shell 1, and the working ends of the first electric push rod 16 face the filter screen 9, and two parallel connecting frames 17 are provided in the water inlet box, and the two connecting frames 17 are respectively arranged perpendicular to the support rod, and the two ends of the two connecting frames 17 are respectively connected to the working ends of different first electric push rods 16, and a second electric push rod matching the support rod is fixed on the connecting frame 17, and the working end of the second electric push rod is connected to the support rod.

[0030] The four corners of the two U-shaped blocks 11 are respectively connected with connecting columns 15, and a spring block 18 is commonly connected between the two diagonal connecting columns 15. A pressure sensor 8 is provided on the inner wall of the water inlet tank.

[0031] The hinge between the two U-shaped blocks 11 and the support rod is a one-way hinge, which ensures that when the water flow drives the filter screen 9 to move toward the inside of the turbine shell 1, the two U-shaped blocks 11 will not fold, ensuring that the two U-shaped blocks 11 will move horizontally inward.

[0032] Working principle: by rotating the nut 6, the sleeve 2 can drive the mounting frame 7, the flow meter 4 and the insert 3 to rise and fall, and then adjust the distance between the flow meter 4 and the turbine shell 1 to ensure that when detecting the flow rate, the turbine shell 1 is located at a corresponding depth in the water, while the flow meter 4 is not in the water. The column 13 is inserted into the water, and the water inlet of the turbine shell 1 faces the upstream direction of the water flow. When measuring, the water flows into the turbine shell 1 under the filtering effect of the filter 9, and drives the turbine blades to rotate. The blade shaft drives the insert column 5 to rotate, and the insert column 5 drives the insert 3 to rotate. The insert 3 drives the input shaft of the flow meter 4 to rotate, and the flow meter 4 reflects the rotation speed of the insert 3, the insert column 5 and the turbine blades, which indicates the flow rate of water.

[0033] When debris begins to appear on the surface of the filter 9, it will affect the water flow, and then the water flow will push the two U-shaped blocks 11 to move horizontally inward, and at the same time drive the connecting column 15 and the elastic block 18 to move inward, and the elastic block 18 squeezes the pressure sensor 8. When the pressure sensor 8 detects that the pressure of the elastic block 18 reaches a preset value, it means that there are too many debris on the filter surface of the filter 9 and it needs to be cleaned;

[0034] When there are too many debris on the surface of the filter 9 and the filter 9 needs to be cleaned, the first electric push rod 16 extends and pushes the connecting frame 17 to move toward the opening of the water inlet tank, pushing the filter 9 to move parallel to the water inlet of the turbine shell 1. Then, the second electric push rod extends and pushes the support rod to move outward, so that the filter 9 changes from a flat-laid state to a V-shaped state. Under the flushing effect of the water flow, the filtered matter on the inclined surface of the filter 9 is automatically removed.

[0035] The wiring diagram of the flow meter 4, pressure sensor 8, and electric push rod 16 in the utility model belongs to the common knowledge in the field, and its working principle is a well-known technology. The model is selected according to the actual use. Therefore, the control method and wiring arrangement of the flow meter 4, pressure sensor 8, and electric push rod 16 are no longer explained in detail.

[0036] Example 1

[0037] Flow velocity measuring devices used in water conservancy and hydropower projects, such as Figure 1 As shown, it includes a turbine shell 1, the lower end surface of the turbine shell 1 is connected to a floating seat 12 through a plurality of first connecting rods, and the lower end surface of the floating seat 12 is connected to a plurality of evenly arranged columns 13.

[0038] like Figure 2 As shown, the upper end surface of the turbine housing 1 is connected to the mounting frame 7 through a plurality of telescopic components, and the plurality of telescopic components are evenly arranged along the circumference of the insert 3, such as Figure 3 As shown, the telescopic assembly includes a screw rod 14, one end of which is connected to the turbine shell 1, and a sleeve 2 is provided on the outer movable sleeve of the screw rod 14. The end of the sleeve 2 away from the turbine shell 1 is connected to the mounting bracket 7, wherein two screw rods 14 are externally threaded with nuts 6, and the nuts 6 are located below the sleeve 2. The two nuts 6 are symmetrically arranged about the rotating assembly. By rotating the nuts 6, the sleeve 2 can drive the mounting bracket 7 and the flow meter 4 to rise and fall, thereby adjusting the distance between the flow meter 4 and the turbine shell 1 to ensure that when detecting the flow rate, the turbine shell 1 is located at a corresponding depth in the water, and the flow meter 4 is not in the water.

[0039] A velocity meter 4 is provided at the center of the mounting frame 7, a rotating shaft is rotatably provided at the center of the turbine shell 1, a plurality of uniformly arranged turbine blades are provided on the outer sleeve of the rotating shaft, an upper end of the rotating shaft movably penetrates the upper wall of the turbine shell 1 and is connected to a rotating assembly, the other end of the rotating assembly movably penetrates the mounting frame 7 and is connected to the input shaft of the velocity meter 4, a water inlet tank is connected to the side wall of the turbine shell 1, a filtering mechanism is provided in the water inlet tank, and a protective frame 19 is connected to the upper end of the mounting frame 7 through a plurality of uniformly arranged second connecting rods for protecting the velocity meter 4.

[0040] Example 2

[0041] Flow velocity measuring devices used in water conservancy and hydropower projects, such as Figure 1As shown, it includes a turbine shell 1, the lower end surface of the turbine shell 1 is connected to a floating seat 12 through a plurality of first connecting rods, and the lower end surface of the floating seat 12 is connected to a plurality of evenly arranged columns 13.

[0042] like Figure 2 As shown, the upper end surface of the turbine housing 1 is connected to the mounting frame 7 through a plurality of telescopic components, and the plurality of telescopic components are evenly arranged along the circumference of the insert 3, such as Figure 3 As shown, the telescopic assembly includes a screw rod 14, one end of which is connected to the turbine shell 1, and a sleeve 2 is provided on the outer movable sleeve of the screw rod 14. The end of the sleeve 2 away from the turbine shell 1 is connected to the mounting bracket 7, wherein two screw rods 14 are externally threaded with nuts 6, and the nuts 6 are located below the sleeve 2. The two nuts 6 are symmetrically arranged about the rotating assembly. By rotating the nuts 6, the sleeve 2 can drive the mounting bracket 7 and the flow meter 4 to rise and fall, thereby adjusting the distance between the flow meter 4 and the turbine shell 1 to ensure that when detecting the flow rate, the turbine shell 1 is located at a corresponding depth in the water, while the flow meter 4 is not in the water.

[0043] A velocity meter 4 is provided at the center of the mounting frame 7, a rotating shaft is rotatably provided at the center of the turbine shell 1, a plurality of uniformly arranged turbine blades are provided on the outer sleeve of the rotating shaft, an upper end of the rotating shaft movably penetrates the upper wall of the turbine shell 1 and is connected to a rotating assembly, the other end of the rotating assembly movably penetrates the mounting frame 7 and is connected to the input shaft of the velocity meter 4, a water inlet tank is connected to the side wall of the turbine shell 1, a filtering mechanism is provided in the water inlet tank, and a protective frame 19 is connected to the upper end of the mounting frame 7 through a plurality of uniformly arranged second connecting rods for protecting the velocity meter 4.

[0044] Among them, the rotating component includes a plug column 5, the first end of the plug column 5 is connected to the rotating shaft, and the plug cylinder 3 is slidably sleeved on the outside of the plug column 5. The specific sliding sleeve method is: a plurality of sliding grooves are provided on the outer side of the plug column 5 along its longitudinal direction, and a slider matching the sliding groove is provided on the inner wall of the plug cylinder 3. The slider is slidably set in the corresponding sliding groove. This structure ensures that the plug cylinder 3 can slide up and down along the plug column 5 and cannot rotate at will. The end of the plug cylinder 3 away from the turbine shell 1 is connected to the input shaft of the flow meter 4. According to the above description, by rotating the nut 6, the sleeve 2 can be moved up and down, and the plug cylinder 3 can move up and down accordingly, and can drive the flow meter 4 to rotate synchronously with the rotation of the turbine blades.

[0045] Working principle: By rotating the nut 6, the sleeve 2 can drive the mounting frame 7, the flow meter 4 and the insert tube 3 to rise and fall, and then adjust the distance between the flow meter 4 and the turbine shell 1 to ensure that when detecting the flow rate, the turbine shell 1 is located at the corresponding depth in the water, and the flow meter 4 is not in the water. The column 13 is inserted into the water, and the water inlet of the turbine shell 1 faces the upstream direction of the water flow. During measurement, the water flows into the turbine shell 1 under the filtering effect of the filter screen 9, and drives the turbine blades to rotate. The blade shaft drives the insert column 5 to rotate, and the insert column 5 drives the insert tube 3 to rotate. The input shaft of the flow meter 4 is driven to rotate through the insert tube 3, and the rotation speed of the insert tube 3, the insert column 5 and the turbine blades is reflected by the flow meter 4, which indicates the flow rate of water.

[0046] Example 3

[0047] Flow velocity measuring devices used in water conservancy and hydropower projects, such as Figure 1 As shown, it includes a turbine shell 1, the lower end surface of the turbine shell 1 is connected to a floating seat 12 through a plurality of first connecting rods, and the lower end surface of the floating seat 12 is connected to a plurality of evenly arranged columns 13.

[0048] like Figure 2 As shown, the upper end surface of the turbine shell 1 is connected to the mounting frame 7 through a plurality of telescopic components, a flow meter 4 is arranged at the center of the mounting frame 7, a rotating shaft is rotatably arranged at the center of the interior of the turbine shell 1, a plurality of uniformly arranged turbine blades are arranged on the outer sleeve of the rotating shaft, the upper end of the rotating shaft movably penetrates the upper wall of the turbine shell 1 and is connected to a rotating component, the other end of the rotating component movably penetrates the mounting frame 7 and is connected to the input shaft of the flow meter 4, the side wall of the turbine shell 1 is connected to a water inlet tank, a filtering mechanism is arranged in the water inlet tank, the upper end of the mounting frame 7 is connected to a protective frame 19 through a plurality of uniformly arranged second connecting rods for protecting the flow meter 4.

[0049] like Figure 4 As shown, the filtering mechanism includes an elastic ring 10, an opening is provided on the side of the water inlet box away from the turbine shell 1, the elastic ring 10 is arranged around the inner wall of the water inlet box opening, and two U-shaped blocks 11 are fitted on the side of the elastic ring 10 close to the turbine shell 1, the openings of the two U-shaped blocks 11 are opposite, a support rod is provided between the two U-shaped blocks 11, the support rod is arranged parallel to the column 13, the two U-shaped blocks 11 are hinged on the support rod, and the two U-shaped blocks 11 are connected to the filter screen 9 on the side close to the turbine shell 1, respectively, and the first electric push rod 16 is connected to the four corners of the inner wall of the water inlet box close to the turbine shell 1, and the working ends of the first electric push rod 16 face the filter screen 9, and two parallel connecting frames 17 are provided in the water inlet box, and the two connecting frames 17 are respectively arranged perpendicular to the support rod, and the two ends of the two connecting frames 17 are respectively connected to the working ends of different first electric push rods 16, and a second electric push rod matching the support rod is fixed on the connecting frame 17, and the working end of the second electric push rod is connected to the support rod.

[0050] The four corners of the two U-shaped blocks 11 are respectively connected with connecting columns 15, and a spring block 18 is commonly connected between the two diagonal connecting columns 15. A pressure sensor 8 is provided on the inner wall of the water inlet tank.

[0051] The hinge between the two U-shaped blocks 11 and the support rod is a one-way hinge, which ensures that when the water flow drives the filter screen 9 to move toward the inside of the turbine shell 1, the two U-shaped blocks 11 will not fold, ensuring that the two U-shaped blocks 11 will move horizontally inward.

[0052] Working principle: When debris begins to appear on the surface of the filter 9, it will affect the water flow permeability, and then the water flow will push the two U-shaped blocks 11 to move horizontally inward, and at the same time drive the connecting column 15 and the elastic block 18 to move inward, and the elastic block 18 squeezes the pressure sensor 8. When the pressure sensor 8 detects that the pressure of the elastic block 18 reaches the preset value, it means that there are too many debris on the filter surface of the filter 9 and it needs to be cleaned;

[0053] When there are too many debris on the surface of the filter 9 and the filter 9 needs to be cleaned, the first electric push rod 16 extends and pushes the connecting frame 17 to move toward the opening of the water inlet tank, pushing the filter 9 to move parallel to the water inlet of the turbine shell 1. Then, the second electric push rod extends and pushes the support rod to move outward, so that the filter 9 changes from a flat-laid state to a V-shaped state. Under the flushing effect of the water flow, the filtered matter on the inclined surface of the filter 9 is automatically removed.

Claims

1. A flow velocity measuring device for water conservancy and hydropower engineering, characterized in that: The invention comprises a turbine shell (1), wherein the lower end surface of the turbine shell (1) is connected to a floating seat (12) via a plurality of first connecting rods, the lower end surface of the floating seat (12) is connected to a plurality of evenly arranged columns (13), the upper end surface of the turbine shell (1) is connected to a mounting frame (7) via a plurality of telescopic components, a flow meter (4) is provided at the center of the mounting frame (7), a rotating shaft is rotatably provided at the center of the interior of the turbine shell (1), a plurality of evenly arranged turbine blades are provided on the outer sleeve of the rotating shaft, the upper end of the rotating shaft movably penetrates the upper wall of the turbine shell (1) and is connected to a rotating component, the other end of the rotating component movably penetrates the mounting frame (7) and is connected to the input shaft of the flow meter (4), the side wall of the turbine shell (1) is connected to a water inlet box, a filtering mechanism is provided in the water inlet box, and the upper end of the mounting frame (7) is connected to a protective frame (19) via a plurality of evenly arranged second connecting rods.

2. The flow velocity measuring device for water conservancy and hydropower engineering according to claim 1, characterized in that: The plurality of telescopic components are evenly arranged along the circumference of the insert tube (3).

3. The flow velocity measuring device for water conservancy and hydropower engineering according to claim 2 is characterized in that: The telescopic assembly comprises a screw rod (14), one end of which is connected to the turbine housing (1), a sleeve (2) is provided on the outer movable sleeve of the screw rod (14), and the end of the sleeve (2) away from the turbine housing (1) is connected to the mounting frame (7), wherein two screw rods (14) are externally threaded with nuts (6), the nuts (6) are located below the sleeve (2), and the two nuts (6) are symmetrically arranged with respect to the rotating assembly.

4. The flow velocity measuring device for water conservancy and hydropower engineering according to claim 3 is characterized in that: The rotating assembly comprises an insertion column (5), a first end of the insertion column (5) is connected to the rotating shaft, an insertion sleeve (3) is provided on the outside of the insertion column (5), a plurality of slide grooves are provided on the outside of the insertion column (5) along its longitudinal direction, a slider matching the slide groove is provided on the inner wall of the insertion sleeve (3), the slider is slidably arranged in the corresponding slide groove, and an end of the insertion sleeve (3) away from the turbine housing (1) is connected to the input shaft of the flow meter (4).

5. The flow velocity measuring device for water conservancy and hydropower engineering according to claim 1, characterized in that: The filtering mechanism comprises an elastic ring (10); an opening is provided on a side of the water inlet box away from the turbine housing (1); the elastic ring (10) is arranged around the inner wall of the water inlet box opening; two U-shaped blocks (11) are provided on a side of the elastic ring (10) close to the turbine housing (1); the openings of the two U-shaped blocks (11) are opposite to each other; a support rod is provided between the two U-shaped blocks (11); the two U-shaped blocks (11) are respectively hinged on the support rod; and the two U-shaped blocks (11) are respectively hinged on the support rod. A filter screen (9) is connected to one side of the block (11) close to the turbine shell (1), and first electric push rods (16) are connected to four corners of the inner wall of the water inlet box close to the turbine shell (1), and the working ends of the first electric push rods (16) face the filter screen (9). Two parallel connecting frames (17) are provided in the water inlet box, and the two ends of the two connecting frames (17) are respectively connected to the working ends of different first electric push rods (16). A second electric push rod matched with a support rod is fixed on the connecting frame (17), and the working end of the second electric push rod is connected to the support rod; The four corners of the two U-shaped blocks (11) are respectively connected to connecting columns (15), and a spring block (18) is commonly connected between the two diagonal connecting columns (15). A pressure sensor (8) is provided on the inner wall of the water inlet tank.

6. The flow velocity measuring device for water conservancy and hydropower engineering according to claim 5, characterized in that: The support rod is arranged parallel to the column (13), and the two connecting frames (17) are respectively arranged perpendicular to the support rod.

7. The flow velocity measuring device for water conservancy and hydropower engineering according to claim 5, characterized in that: The hinge between the two U-shaped blocks (11) and the support rod is a one-way hinge.

8. The flow velocity measuring device for water conservancy and hydropower engineering according to claim 1, characterized in that: The interior of the floating seat (12) is hollow, and a filling port is provided in the hollow portion.

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