A water depth measuring device for hydraulic engineering

Abstract

The present invention belongs to the technical field of water depth measurement, and discloses a water depth measurement device for a water conservancy project, including a buoyancy board, the buoyancy board is annular, a measuring board is arranged on the upper side of the buoyancy board, the buoyancy board and the measuring board are connected by a supporting column, a measuring groove is penetrated through the upper wall of the measuring board, an angle measuring ruler is arranged on the upper wall of the measuring board, the angle measuring ruler is semi-annular, the angle measuring ruler spans the two ends of the measuring groove, an automatic tightening measuring component is arranged to rotate in the measuring groove of the measuring board, a collinear detection component is arranged on the automatic tightening measuring component, and a distance measuring component is arranged on the measuring board and the automatic tightening measuring component. The buoyancy board of the present invention drifts away along the water flow, straightens the optical fiber bundle, and directly measures the angle between the optical fiber bundle and the water surface by using the light beam at the conduction position of the optical fiber bundle, and at the same time, the value of the vertical measuring ruler can be read by using a periscope, thereby solving the problem that the measuring ruler is easy to tilt and the measurement reading is difficult.

Description

Technical Field

[0001] The invention belongs to the technical field of water depth measurement, and specifically refers to a water depth measurement device for a hydraulic engineering project. Background Art

[0002] Water conservancy projects are projects built to eliminate water disasters and develop and utilize water resources. The water level of existing water conservancy projects is mainly monitored by erecting fixed rulers in the river channel to facilitate staff to observe the water level of the river. Although such rulers can meet the understanding of the river water level in most cases, it is difficult to place the ruler stably when the terrain at the bottom of the water is complex, and when there are debris on the water surface, the ruler is easily damaged and floating objects are intercepted; when using a mobile measuring ruler, the measuring ruler is in contact with the debris at the bottom of the river channel and the water flow speed is too high, the measuring ruler is prone to tilt during use, resulting in reduced measurement accuracy, and the existing fixed rulers and mobile measuring rulers are not convenient for reading the measured values.

[0003] Therefore, a water depth measuring device for a hydraulic engineering project is needed to solve the above problems. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a water depth measuring device for water conservancy projects. The buoyancy plate drifts away along the water flow, straightens the optical fiber bundle, and uses the light beam at the transmission point of the optical fiber bundle to directly measure the angle between the optical fiber bundle and the water surface. At the same time, the value of the vertical measuring ruler can be read using a periscope, which solves the problem that the measuring ruler is prone to tilt and the measurement reading is difficult.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a water depth measuring device for a water conservancy project, comprising a buoyancy plate, which is annular, a measuring plate is provided on the upper side of the buoyancy plate, the buoyancy plate and the measuring plate are connected by a supporting column, a measuring groove is penetrated through the upper wall of the measuring plate, an angle measuring scale is provided on the upper wall of the measuring plate, the angle measuring scale is semi-annular, and the angle measuring scale spans across the two ends of the measuring groove, an automatic tensioning measuring component is rotatably provided in the measuring groove of the measuring plate, a collinear detection component is provided on the automatic tensioning measuring component, and a distance measuring component is provided on the measuring plate and the automatic tensioning measuring component.

[0006] Furthermore, the automatic tensioning measurement assembly comprises a rotating shaft, a rotating cylinder, an optical fiber bundle, a tensioning spring, a fixed baffle, a limiting rod, a light guide column, a marking ring, an adjustment motor and a depth measuring light source ball. The side wall of the rotating cylinder is arranged on the inner wall of the measuring groove of the measuring plate through the rotating shaft. The optical fiber bundle runs through the rotating cylinder. The upper end of the optical fiber bundle is fixedly provided with a fixed baffle. The tensioning spring array is arranged between the upper end surface of the rotating cylinder and the fixed baffle. The depth measuring light source ball is arranged at the lower end of the optical fiber bundle. The upper end surface of the rotating cylinder is provided with limiting holes around the axis array. The limiting holes are blind holes. The upper end of the limiting rod is arranged on the lower end surface of the fixed baffle. The limiting rod is slidably arranged in the limiting hole. The light guide column is arranged on the end surface of the fixed baffle. The light guide column is connected to the end of the optical fiber bundle. The marking ring is arranged on the light guide column. The upper wall of the measuring plate is provided with a placement groove. The adjusting motor is arranged in the placement groove. One end of the rotating shaft is connected to the adjusting motor.

[0007] Furthermore, the colinear detection assembly includes an elastic bent plate, a retaining ring and a warning light, the elastic bent plate is symmetrically arranged at the lower end of the rotating cylinder, the retaining ring is arranged at the end of the elastic bent plate, the retaining ring is in a semicircular shape, and the two retaining rings surround the optical fiber bundle. The warning light is arranged on the upper wall of the measuring plate, the retaining ring is a conductor, and the two retaining rings and the warning light form an electrical circuit through wires and a power supply. When the two retaining rings are docked, the warning light lights up.

[0008] Furthermore, the distance measuring assembly includes a vertical measuring ruler, an observation tube, a swing arm, a limit plate, a supporting floating plate, an observation mark and a periscope. The upper wall of the measuring plate is provided with a sliding groove, the bottom wall of the sliding groove is provided with a limit groove, the sliding groove is parallel to the measuring groove, the side wall of the sliding groove is provided with a side groove, the lower end of the swing arm is arranged on the rotating shaft, the observation tube is arranged through the upper end of the swing arm, the middle part of the observation tube is arranged through a sliding hole along the diameter direction, the limit plate is slidably arranged in the sliding groove, one side of the limit plate is slidably arranged in the side groove, the vertical measuring ruler is arranged through the limit plate, the vertical measuring ruler passes through the sliding hole and the limit groove, the supporting floating plate is arranged at the lower end of the vertical measuring ruler, the lower end of the periscope is arranged at the end of the observation tube away from one end of the swing arm, and the observation mark is arranged on the inner wall of the observation tube close to the vertical measuring ruler.

[0009] Furthermore, the depth sounding light source ball includes a hollow sphere, a connecting rod and a lighting lamp, the hollow sphere is arranged at the lower end of the optical fiber bundle, the lower end of the optical fiber bundle penetrates the outer wall of the hollow sphere, the lower end of the connecting rod is arranged on the inner wall of the hollow sphere, and the lighting lamp is arranged at the upper end of the connecting rod.

[0010] Furthermore, when the two retaining rings are butt-jointed, the diameter of the central hole between the two retaining rings is greater than the diameter of the optical fiber bundle.

[0011] Furthermore, the angle measuring ruler is made of transparent material.

[0012] Furthermore, the buoyancy plate is provided with a rolling seam running through it, and the width of the rolling seam is greater than the diameter of the optical fiber bundle.

[0013] Furthermore, light shielding plates are symmetrically provided on both side walls of the angle measuring ruler.

[0014] The beneficial effects achieved by the present invention using the above structure are as follows:

[0015] 1. In the water flow, the buoyancy plate floats along the water flow, thereby automatically tightening the optical fiber bundle, and the optical fiber bundle pulls down the fixed baffle, and the fixed baffle presses down the limit rod and the tension spring. The limit rod enters the limit hole, and it can be judged that the optical fiber bundle is in a tightened state. From the warning light, it can be judged whether the optical fiber bundle and the rotating cylinder are overlapped. If the warning light is not on, it means that the center line of the optical fiber bundle and the center line of the rotating cylinder do not coincide;

[0016] 2. After the center lines of the optical fiber bundle and the rotating cylinder are adjusted to coincide, the light of the illumination lamp of the depth-measuring light source ball is transmitted from the optical fiber bundle to the light guide column, and then illuminated to the angle measuring ruler. The angle value a of the angle measuring ruler can be directly read, that is, the angle a between the axis of the rotating cylinder and the optical fiber bundle and the water surface. The value b of the vertical measuring ruler can be directly read from a height using a periscope;

[0017] 3. The total length of the optical fiber bundle is known to be e, and the distance from the marking ring to the fixed baffle is d. According to the Pythagorean theorem, the length from the fixed baffle to the water surface along the direction of the optical fiber bundle (i.e. the length of the optical fiber bundle above the water surface) is calculated to be h=b / sina-d, and the water depth is H=(eh)*sina. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front perspective structural diagram of a water depth measuring device for a water conservancy project proposed by the present invention;

[0019] Figure 2 This is a schematic diagram of the bottom three-dimensional structure of a water depth measuring device for a water conservancy project proposed by the present invention;

[0020] Figure 3 for Figure 1 A top view of

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the automatic tensioning measurement component;

[0022] Figure 5 is a schematic diagram of the three-dimensional structure of the distance measurement component;

[0023] Figure 6 for Figure 5 The main view;

[0024] Figure 7 for Figure 5 Right view of;

[0025] Figure 8 This is a schematic diagram of the internal structure of the depth sounding light source ball;

[0026] Fig. 9 for Figure 4 A magnified view of part A in FIG.

[0027] Fig.10 for Figure 7 A magnified view of part B in FIG.

[0028] Fig.11 for Figure 1 A magnified view of part C in FIG.

[0029] Fig.12 for Figure 3 Schematic diagram of the EE cross section.

[0030] Among them, 1. buoyancy plate, 2. measuring plate, 3. support column, 4. measuring slot, 5. angle measuring ruler, 6. automatic tension measuring component, 7. collinear detection component, 8. distance measuring component, 9. rotating shaft, 10. rotating cylinder, 11. optical fiber bundle, 12. tension spring, 13. fixed baffle, 14. limit rod, 15. light guide column, 16. marking ring, 17. adjusting motor, 18. depth light source ball, 19. limit hole, 20. , placement groove, 21. elastic bent plate, 22. retaining ring, 23. warning light, 24. vertical measuring ruler, 25. observation tube, 26. swing arm, 27. limit plate, 28. support float, 29. observation mark, 30. periscope, 31. sliding groove, 32. limit groove, 33. side groove, 34. sliding hole, 35. hollow sphere, 36. connecting rod, 37. lighting lamp, 38. winding seam, 39. light shield, 40. water surface line.

[0031] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0032] 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 only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] like Figure 1 , Figure 2 As shown, the present invention proposes a water depth measuring device for a water conservancy project, comprising a buoyancy plate 1, wherein the buoyancy plate 1 is annular, a measuring plate 2 is arranged on the upper side of the buoyancy plate 1, the buoyancy plate 1 and the measuring plate 2 are connected by a supporting column 3, a measuring groove 4 is penetrated through the upper wall of the measuring plate 2, an angle measuring ruler 5 is arranged on the upper wall of the measuring plate 2, the angle measuring ruler 5 is semi-annular, and the angle measuring ruler 5 spans across the two ends of the measuring groove 4, an automatic tightening measuring component 6 is rotatably arranged in the measuring groove 4 of the measuring plate 2, a collinear detection component 7 is arranged on the automatic tightening measuring component 6, a distance measuring component 8 is arranged on the measuring plate 2 and the automatic tightening measuring component 6, wherein the center of the angle measuring ruler 5 coincides with the center of the measuring plate 2.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the automatic tensioning measuring assembly 6 includes a rotating shaft 9, a rotating cylinder 10, an optical fiber bundle 11, a tensioning spring 12, a fixed baffle 13, a limiting rod 14, a light guide column 15, a marking ring 16, an adjusting motor 17 and a depth measuring light source ball 18. The side wall of the rotating cylinder 10 is arranged on the inner wall of the measuring groove 4 of the measuring plate 2 through the rotating shaft 9. The optical fiber bundle 11 runs through the rotating cylinder 10. The upper end of the optical fiber bundle 11 is fixedly provided on the fixed baffle 13. The tensioning spring 12 is arranged in an array between the upper end surface of the rotating cylinder 10 and the fixed baffle 13. The depth measuring light source ball 18 is arranged at the lower end of the optical fiber bundle 11. The upper end surface of the rotating cylinder 10 is provided with limiting holes 19 in an array around the axis. The limiting hole 19 is a blind hole, the upper end of the limiting rod 14 is arranged on the lower end surface of the fixed baffle 13, the limiting rod 14 is slidably arranged in the limiting hole 19, the light guide column 15 is arranged on the end surface of the fixed baffle 13, the light guide column 15 is connected to the end of the optical fiber bundle 11, the marking ring 16 is arranged on the light guide column 15, the upper wall of the measuring plate 2 is provided with a placement groove 20, the adjusting motor 17 is arranged in the placement groove 20, one end of the rotating shaft 9 is connected to the adjusting motor 17, when the optical fiber bundle 11 is in a taut state, the marking ring 16 is just aligned with the tube mouth of the observation tube 25, wherein the total length of the optical fiber bundle 11 is e, and the distance between the marking ring 16 and the fixed baffle 13 is d.

[0036] like Figure 1 , Figure 2 , Figure 4 , Fig. 9 As shown, the collinear detection component 7 includes an elastic bent plate 21, a retaining ring 22 and a warning light 23. The elastic bent plate 21 is symmetrically arranged at the lower end of the rotating cylinder 10, and the retaining ring 22 is arranged at the end of the elastic bent plate 21. The retaining ring 22 is a semicircular ring. The two retaining rings 22 surround the optical fiber bundle 11. The warning light 23 is arranged on the upper wall of the measuring plate 2. The retaining ring 22 is a conductor. The two retaining rings 22 and the warning light 23 form an electrical circuit through a wire and a power supply. When the two retaining rings 22 are connected, the warning light 23 lights up.

[0037] like Figure 1 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig.10 , Fig.11 As shown, the distance measuring assembly 8 includes a vertical measuring ruler 24, an observation tube 25, a swing arm 26, a limit plate 27, a supporting floating plate 28, an observation mark 29 and a periscope 30. The upper wall of the measuring plate 2 is provided with a sliding groove 31, the bottom wall of the sliding groove 31 is provided with a limit groove 32, the sliding groove 31 is parallel to the measuring groove 4, and the side wall of the sliding groove 31 is provided with a side groove 33. The lower end of the swing arm 26 is provided on the rotating shaft 9, the observation tube 25 is provided through the upper end of the swing arm 26, and the middle part of the observation tube 25 is along A sliding hole 34 is provided through the diameter direction, the limit plate 27 is slidably provided in the sliding groove 31, one side of the limit plate 27 is slidably provided in the side groove 33, the vertical measuring scale 24 is provided through the limit plate 27, the vertical measuring scale 24 passes through the sliding hole 34 and the limit groove 32, the supporting floating plate 28 is provided at the lower end of the vertical measuring scale 24, the lower end of the periscope 30 is provided at the end of the observation tube 25 away from one end of the swing arm 26, and the observation mark 29 is provided on the inner wall of the observation tube 25 near the vertical measuring scale 24.

[0038] like Figure 1 , Figure 7 As shown, the depth sounding light source ball 18 includes a hollow sphere 35, a connecting rod 36 and an illuminating lamp 37. The hollow sphere 35 is arranged at the lower end of the optical fiber bundle 11, and the lower end of the optical fiber bundle 11 passes through the outer wall of the hollow sphere 35. The lower end of the connecting rod 36 is arranged on the inner wall of the hollow sphere 35, and the illuminating lamp 37 is arranged at the upper end of the connecting rod 36.

[0039] like Figure 2 , Figure 4 , Fig. 9 As shown, when the two retaining rings 22 are butt-jointed, the diameter of the center hole between the two retaining rings 22 is greater than the diameter of the optical fiber bundle 11 .

[0040] like Figure 1 , Figure 3 As shown, the angle measuring ruler 5 is made of transparent material.

[0041] like Figure 1 The buoyancy plate 1 is provided with a winding seam 38 , and the width of the winding seam 38 is greater than the diameter of the optical fiber bundle 11 .

[0042] like Figure 1 As shown, light shielding plates 39 are symmetrically provided on both side walls of the angle measuring ruler 5 to facilitate observation of the values ​​on the angle measuring ruler 5 .

[0043] When in use, the depth measuring light source ball 18 is put into the water, the depth measuring light source ball 18 sinks to the bottom of the water, the optical fiber bundle 11 passes through the winding seam 38, so that the optical fiber bundle 11 is inside the buoyancy board 1, and the buoyancy board 1 floats on the water surface. Fig.12 As shown, the dotted line on the buoyancy board 1 is the position of the water surface line 40. The buoyancy board 1 drifts away along the water flow until the buoyancy board 1 is in a stationary state on the water surface. When there is no water flow, the buoyancy board 1 can be directly moved along the water surface, and the optical fiber bundle 11 pulls down the fixed baffle 13, and the fixed baffle 13 presses down the limit rod 14 and the tension spring 12, and the limit rod 14 enters the limit hole 19. The fixed baffle 13 drives the light guide column 15 and the marking ring 16 to move. When the marking ring 16 is aligned with the observation tube 25, the marking ring 16 can be seen from the periscope 30, and it can be judged that the optical fiber bundle 11 is in a taut state;

[0044] Observe the warning light 23. If the warning light 23 is not on, it means that the center line of the optical fiber bundle 11 and the center line of the rotating cylinder 10 do not coincide. Turn on the adjustment motor 17, the adjustment motor 17 drives the rotating shaft 9 to rotate, the rotating shaft 9 drives the rotating cylinder 10 to rotate, and at the same time the rotating shaft 9 drives the swing arm 26 to rotate, the swing arm 26 drives the observation tube 25 to swing, the observation tube 25 drives the vertical measuring ruler 24 to move horizontally, the vertical measuring ruler 24 slides in the sliding hole 34 of the observation tube 25, the vertical measuring ruler 24 drives the limit plate 27 to slide horizontally in the sliding groove 31, the limit plate 27 drives the support floating plate 28 to move, and the support floating plate 28 is moved. The plate 28 floats on the water surface. When the warning light 23 is on, the two elastic curved plates 21 drive the two retaining rings 22 to dock together, indicating that the center lines of the optical fiber bundle 11 and the rotating cylinder 10 coincide. Keep still, turn on the lighting lamp 37 in the hollow sphere 35, and the light is transmitted from the optical fiber bundle 11 to the light guide column 15. The light guide column 15 shines the light on the angle measuring ruler 5. Read the angle value a on the angle measuring ruler 5, and read the value b of the observation mark 29 on the vertical measuring ruler 24 from the periscope 30. It is known that the total length of the optical fiber bundle 11 is e, and the distance between the marking ring 16 and the fixed baffle 13 is d. Fig.12As shown, according to the Pythagorean theorem, the length between the fixed baffle 13 and the water surface along the direction of the optical fiber bundle 11 (i.e., the length of the optical fiber bundle 11 above the water surface) is calculated to be h=b / sina-d, and the water depth is h=(eh)*sina.

[0045] When the measurement is completed, the optical fiber bundle 11 is moved from the winding slit 38 to the upper side of the buoyancy board 1 , and then the optical fiber bundle 11 is wound around the central axis of the buoyancy board 1 on the support column 3 to complete the winding of the optical fiber bundle 11 .

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

[0048] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A water depth measuring device for a hydraulic project, comprising a buoyancy plate (1), characterized in that: The buoyancy plate (1) is annular, a measuring plate (2) is provided on the upper side of the buoyancy plate (1), the buoyancy plate (1) and the measuring plate (2) are connected via a support column (3), a measuring groove (4) is provided through the upper wall of the measuring plate (2), an angle measuring ruler (5) is provided on the upper wall of the measuring plate (2), the angle measuring ruler (5) is semi-annular, and the angle measuring ruler (5) spans across the two ends of the measuring groove (4), an automatic tightening measuring component (6) is rotatably provided in the measuring groove (4) of the measuring plate (2), a collinearity detection component (7) is provided on the automatic tightening measuring component (6), and a distance measuring component (8) is provided on the measuring plate (2) and the automatic tightening measuring component (6); The automatic tensioning measuring assembly (6) comprises a rotating shaft (9), a rotating cylinder (10), an optical fiber bundle (11), a tensioning spring (12), a fixed baffle (13), a limiting rod (14), a light guide column (15), a marking ring (16), an adjusting motor (17) and a depth-measuring light source ball (18); the side wall of the rotating cylinder (10) is arranged on the inner wall of the measuring groove (4) of the measuring plate (2) through the rotating shaft (9); the optical fiber bundle (11) passes through the rotating cylinder (10); the upper end of the optical fiber bundle (11) is fixedly provided on the fixed baffle (13); the tensioning spring (12) array is arranged between the upper end surface of the rotating cylinder (10) and the fixed baffle (13); the depth-measuring light source ball (18) is arranged on the inner wall of the measuring groove (4) of the measuring plate (2); The lower end of the optical fiber bundle (11), the upper end surface of the rotating cylinder (10) is provided with a limiting hole (19) in an array around the axis, the limiting hole (19) is a blind hole, the upper end of the limiting rod (14) is provided on the lower end surface of the fixed baffle (13), the limiting rod (14) is slidably provided in the limiting hole (19), the light guide column (15) is provided on the end surface of the fixed baffle (13), the light guide column (15) is connected to the end of the optical fiber bundle (11), the marking ring (16) is provided on the light guide column (15), the upper wall of the measuring plate (2) is provided with a placement groove (20), the adjusting motor (17) is provided in the placement groove (20), and one end of the rotating shaft (9) is connected to the adjusting motor (17); The collinear detection assembly (7) comprises an elastic bent plate (21), a retaining ring (22) and a warning light (23); the elastic bent plate (21) is symmetrically arranged at the lower end of the rotating cylinder (10); the retaining ring (22) is arranged at the end of the elastic bent plate (21); the retaining ring (22) is in the shape of a semicircular ring; two retaining rings (22) surround the optical fiber bundle (11); the warning light (23) is arranged on the upper wall of the measuring plate (2); the retaining ring (22) is a conductor; the two retaining rings (22) and the warning light (23) form an electrical circuit via a wire and a power supply; when the two retaining rings (22) are butt-jointed, the warning light (23) lights up; The distance measuring assembly (8) comprises a vertical measuring ruler (24), an observation tube (25), a swing arm (26), a limit plate (27), a supporting floating plate (28), an observation mark (29) and a periscope (30); the upper wall of the measuring plate (2) is provided with a sliding groove (31); the bottom wall of the sliding groove (31) is provided with a limit groove (32); the sliding groove (31) is parallel to the measuring groove (4); the side wall of the sliding groove (31) is provided with a side groove (33); the lower end of the swing arm (26) is provided on the rotating shaft (9); the observation tube (25) is provided through the upper end of the swing arm (26); the middle part of the observation tube (25) A sliding hole (34) is provided through the diameter direction, the limit plate (27) is slidably provided in the sliding groove (31), one side of the limit plate (27) is slidably provided in the side groove (33), the vertical measuring ruler (24) is provided through the limit plate (27), the vertical measuring ruler (24) passes through the sliding hole (34) and the limit groove (32), the supporting floating plate (28) is provided at the lower end of the vertical measuring ruler (24), the lower end of the periscope (30) is provided at the end of the observation tube (25) away from the end of the swing arm (26), and the observation mark (29) is provided on the inner wall of the observation tube (25) near the vertical measuring ruler (24).

2. A water depth measuring device for a hydraulic project according to claim 1, characterized in that: The depth sounding light source ball (18) comprises a hollow sphere (35), a connecting rod (36) and an illuminating lamp (37); the hollow sphere (35) is arranged at the lower end of the optical fiber bundle (11); the lower end of the optical fiber bundle (11) penetrates the outer wall of the hollow sphere (35); the lower end of the connecting rod (36) is arranged at the inner wall of the hollow sphere (35); and the illuminating lamp (37) is arranged at the upper end of the connecting rod (36).

3. A water depth measuring device for a hydraulic project according to claim 2, characterized in that: When the two retaining rings (22) are butt-jointed, the diameter of the central hole between the two retaining rings (22) is greater than the diameter of the optical fiber bundle (11).

4. A water depth measuring device for a hydraulic project according to claim 3, characterized in that: The angle measuring ruler (5) is made of transparent material.

5. A water depth measuring device for a hydraulic project according to claim 4, characterized in that: The buoyancy plate (1) is provided with a rolling seam (38) extending through it, and the width of the rolling seam (38) is greater than the diameter of the optical fiber bundle (11).

6. A water depth measuring device for a hydraulic project according to claim 5, characterized in that: Light blocking plates (39) are symmetrically provided on two side walls of the angle measuring ruler (5).

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