Triangular weir for measuring water flow
By designing a measuring groove and float system on the weir plate of the weir plate, the problem of inaccurate measurement of the water level of the weir is solved, and the accurate measurement of water flow and operation convenience is achieved.
Patent Information
- Application Number
- CN202420548643.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-20
AI Technical Summary
The gap in the existing triangular weir is an inverted triangle, which causes a gap between the triangular point when the ruler is inserted, and the measured water level is inaccurate, affecting the water flow accuracy.
Design a water flow measurement triangular weir. A triangular weir groove is opened on the weir plate. A measurement groove is opened along the length of the inner wall of the weir groove. The floating bulb is connected to the measuring groove. The limit bar restricts the floating bulb from being separated. The limit bar is marked on the limit bar. Water level scale.
Through the floating float in the measurement tank, the scale value on the limit bar is directly read, which can accurately measure the water flow, reduce measurement errors, and eliminate the need to carry an additional measuring tool, making the operation more convenient.
Smart Images
Figure CN222460626U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of hydrological survey equipment, and in particular to a triangular weir for measuring water flow. Background Art
[0002] The triangular weir is a device used to measure water flow, and its working principle is based on Bernoulli's theorem and Ptolemy's theorem. By introducing water flow into an open channel and measuring the water level at different locations downstream of the triangular weir, the size of the triangular weir and the water flow velocity, the water flow rate can be calculated according to the specified formula.
[0003] The triangular weir has the characteristics of simple equipment and wide measurement range, and can be used to measure small and medium flows. At present, there is a portable plate triangular weir that can be used for outdoor hydrological surveys of open channels such as streams. The plate triangular weir is directly inserted into the stream and fixed with stones. After the triangular weir cuts off the stream for a period of time, the stream will gradually flow out of the gap of the triangular weir and stabilize the water level. Finally, the water level is measured with a ruler to calculate the water flow.
[0004] However, since the gap of the triangular weir is an inverted triangle, even if the bottom of the ruler is inserted into the bottom of the gap, there will still be a gap with the tip of the triangle, which will make the measured water level inaccurate, thus affecting the accuracy of water flow. Utility Model Content
[0005] In order to improve the defect of inaccurate water level measurement of portable triangular weirs, the present application provides a water flow measurement triangular weir.
[0006] The present application provides a triangular weir for measuring water flow, which adopts the following technical solution:
[0007] A triangular weir for measuring water flow, comprising a weir plate, wherein a triangular weir groove is formed on the weir plate; a measuring groove connected to the weir groove is formed on the inner side wall of the weir groove along the length direction, a buoy is slidably connected in the measuring groove, a limit bar for limiting the buoy from escaping from the measuring groove into the weir groove is provided in the weir plate, and a scale for indicating the water level is marked on the limit bar along the length direction.
[0008] By adopting the above technical solution, a measuring slot connected to the weir slot is opened in the weir plate, the water level in the measuring slot is consistent with the water level passing through the weir slot, the buoy can float in the measuring slot and thus float on the water surface of the measuring slot, the limit bar prevents the buoy from escaping from the measuring slot, and the corresponding marked scale value on the limit bar can be directly and conveniently read through the position of the buoy, thereby achieving accurate measurement of water flow and reducing measurement errors. In addition, the staff does not need to carry measuring tools such as rulers, which makes the operation more convenient.
[0009] Optionally, the buoy is in the shape of a thin plate.
[0010] By adopting the above technical solution, the thin plate-shaped buoy can float parallel to the water surface. Compared with buoys of other shapes, it can indicate the corresponding scale value more clearly, further improving the convenience of operation for staff, reading the scale value more accurately, and thus improving the accuracy of water flow calculation results.
[0011] Optionally, the buoy is connected to a traction rope, and one end of the traction rope away from the buoy is connected to the weir plate and the inner wall of the weir groove.
[0012] By adopting the above technical solution, since the triangular weir needs to be carried outdoors, connecting the buoy with a traction rope can prevent the buoy from detaching from the weir plate, making it easy to use. Moreover, the connection of the traction rope can make the floating of the buoy in the measuring trough more stable, further facilitating the reading of the water level scale.
[0013] Optionally, a rope reel is connected to the outer surface of the weir plate, and the rope reel is used to reel in the traction rope. The weir plate is provided with a guide ring at the bottom of the weir groove for the traction rope to pass through.
[0014] By adopting the above technical solution, the traction rope extends out from the rope reel and passes through the guide ring and then is connected to the buoy. When the triangular weir is not used, the traction line can be first wrapped around the rope reel so that the traction rope will not be knotted. When the triangular weir is used, as the water level continues to rise, the buoy floats upward without pulling out the traction rope, and the rope reel still has a certain pulling force on the traction rope, so that the buoy can float up more stably.
[0015] Optionally, the rope winder includes a roller and a locking piece, the roller is rotatably connected to the weir plate, a locking portion is provided at one end of the roller close to the weir plate, and the locking piece is threadedly connected to the weir plate after passing through the locking portion.
[0016] By adopting the above technical solution, when the triangular weir is not needed, the traction rope is wound around the roller, and then the roller is fixed with a locking piece, so that the traction rope will not spread out when the triangular weir is transported.
[0017] Optionally, a filter screen is provided at the connection point between the measuring slot and the weir slot.
[0018] By adopting the above technical solution, there will be a large number of impurities such as leaves, sand and stones in outdoor streams, and the size of the measuring tank is small. The filter can block the impurities from entering the measuring tank, thereby not hindering the floating of the buoy, and then not affecting the water level reading, further ensuring the accuracy of the flow measurement.
[0019] Optionally, there are two limit bars, which are symmetrically arranged about the center plane of the narrow side of the weir plate, and the measuring groove is formed between the two limit bars. The limit bar includes a side plate connected to the weir plate and a baffle plate connected to the side plate by a bend, and a gap connected to the weir groove is formed between the baffle plates of the two limit bars.
[0020] By adopting the above technical solution, because the water flow measurement formula of the triangular weir is also related to the angle and other dimensions of the weir groove, the limit strips arranged on the inner wall of the weir groove form the required measuring groove, which will not increase the angle or width and other dimensions inside the weir groove, thereby further ensuring the measurement accuracy; in addition, the long gap formed between the two limit strips can ensure that the water level in the measuring groove is consistent with the water level in the weir groove.
[0021] Optionally, the limiting strip is detachably connected to the weir plate.
[0022] By adopting the above technical solution, tiny impurities will still enter the measuring tank after long-term use. The limit bar and the weir plate are set to be detachably connected, which can facilitate the cleaning of the measuring tank and will not affect the floating of the buoy on the water surface.
[0023] In summary, the present application includes at least one of the following beneficial effects:
[0024] 1. The water level in the measuring tank is consistent with the water level passing through the weir tank. The buoy can float in the measuring tank and float on the water surface of the measuring tank. Through the position of the buoy, the corresponding mark scale value on the limit bar can be directly and conveniently read, thereby realizing accurate measurement of water flow and reducing measurement errors;
[0025] 2. The staff does not need to carry measuring tools such as rulers, making the operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 Schematic diagram of the structure of the triangular weir for measuring water flow in the embodiment of the present application;
[0027] Figure 2 is an exploded view of a triangular weir for measuring water flow in an embodiment of the present application;
[0028] Figure 3 yes Figure 1 Sectional view along AA direction;
[0029] Figure 4 yes Figure 1 Enlarged view of point B in the middle.
[0030] Explanation of the reference numerals: 1. weir plate; 11. weir groove; 2. measuring groove; 3. buoy; 4. limit strip; 41. side plate; 42. baffle; 5. traction rope; 6. rope reel; 61. roller; 611. locking part; 612. handle; 62. locking piece; 7. guide ring; 8. filter screen. DETAILED DESCRIPTION
[0031] The following is combined with Figure 1-4 This application is described in further detail.
[0032] Reference Figure 1 and Figure 2 The embodiment of the present application discloses a triangular weir for measuring water flow, comprising a weir plate 1, on which a triangular weir groove 11 is provided; a measuring groove 2 connected to the weir groove 11 is provided on the inner side wall of the weir groove 11 along the length direction, a buoy 3 is slidably connected in the measuring groove 2, a limit bar 4 is provided in the weir plate 1 for limiting the buoy 3 from escaping from the measuring groove 2 toward the weir groove 11, and a scale for indicating the water level is marked on the limit bar 4 along the length direction. The water level in the measuring groove 2 is consistent with the water level passing through the weir groove 11, and the buoy 3 can float in the measuring groove 2 and thus float on the water surface of the measuring groove 2. Through the position of the buoy 3, the corresponding mark scale value on the limit bar 4 can be directly and conveniently read, thereby realizing accurate measurement of water flow and reducing measurement errors.
[0033] Reference Figure 1 The weir plate 1 is in the shape of a plate. When used outdoors, it is directly inserted into an open channel such as a stream, and then the two sides are fixed and clamped with stones. The angles at the bottom of the weir groove 11 are generally 30°, 45°, 60° and 90°. In this embodiment, a 90° weir groove 11 is used for illustration. It should be noted that because the side wall of the weir groove 11 is inclined, the scale value needs to be set accordingly according to the angle of the weir groove 11 according to the triangle calculation formula.
[0034] In other embodiments, a T-shaped long groove may be directly opened on the inner side wall of the weir groove 11, and the buoy 3 is slidably connected in the T-shaped long groove and will not be separated, thereby realizing the indication of the scale.
[0035] Because the water flow measurement formula of the triangular weir is also related to the angle and other dimensions of the weir groove 11, in this embodiment, the reference Figure 1In order to reduce the measurement error, the number of limit bars 4 is two and they are symmetrically arranged with respect to the narrow side center plane of the weir plate 1, that is, the two limit bars 4 are arranged on one side inner wall of the weir groove 11, and no mark is required on the other side of the weir groove 11. The length of the limit bar 4 is consistent with the length of the side wall of the weir groove 11, and the bottom of the limit bar 4 abuts against the other side inner wall of the weir groove 11. The measuring groove 2 is formed between the two limit bars 4, so that the angle or width of the weir groove 11 will not be increased, and the measurement accuracy is further guaranteed. The limit bar 4 is made of transparent materials such as high-strength alloy glass or acrylic to facilitate the observation of the position of the buoy 3. The limit strip 4 includes a side plate 41 connected to the weir plate 1 and a baffle plate 42 bent and connected to the side plate 41. The side plate 41 and the baffle plate 42 are preferably connected vertically. One side of the side plate 41 is fixed on the outer surface of the weir plate 1. The distance between the side of the side plate 41 extending toward the weir groove 11 and the wall of the weir groove 11 is preferably 2-5 cm. A gap connected to the weir groove 11 is formed between the baffle plates 42 of the two limit strips 4 to ensure that the water level in the measuring groove 2 is consistent with the water level of the weir groove 11.
[0036] Furthermore, since there are a lot of impurities such as leaves, sand and stones in the outdoor stream, and the size of the measuring slot 2 is small, it is easy to be blocked by impurities and affect the floating of the buoy 3. Therefore, Figure 1 and Figure 2 The connecting part between the measuring tank 2 and the weir tank 11 is covered with a filter screen 8. Specifically, two filter screens 8 are provided, one is installed at the position of the two limit bars 4 at the bottom of the measuring tank 2, and the other is installed in the gap between the two baffles 42. The filter screen 8 is bonded to the limit bar 4 by strong glue or hot melt; the filter screen 8 can block impurities from entering the measuring tank 2, so as not to hinder the floating of the buoy 3, and then will not affect the reading of the water level, further ensuring the accuracy of the flow measurement.
[0037] Furthermore, since tiny impurities will still enter the measuring tank 2 after long-term use, the limit bar 4 and the weir plate 1 are preferably detachably connected to facilitate cleaning of the measuring tank 2. Specifically, the side plate 41 is provided with a plurality of through holes spaced apart along the length direction, and the weir plate 1 is provided with threaded holes, and bolts are passed through the through holes and then threadedly connected to the threaded holes, so that the limit bar 4 is detachably mounted on the weir plate 1, and the limit bar 4 can be removed for cleaning without affecting the floating of the buoy 3 on the water surface.
[0038] Reference Figure 2 and Figure 3The surface of the buoy 3 is coated with bright colors for easy observation. The buoy 3 can be in the shape of a bar, a sphere, etc. In this embodiment, the buoy 3 is preferably in the shape of a thin plate, and the shape of the buoy 3 is consistent with the cross-sectional shape of the limiting groove, so that the thin plate-shaped buoy 3 can float parallel to the water surface. Compared with buoys 3 of other shapes, it can more clearly indicate the corresponding scale value, further improving the convenience of operation for the staff, and reading the scale value more accurately, thereby improving the accuracy of the water flow calculation results.
[0039] Further, in order to facilitate carrying the triangular weir outdoors, refer to Figure 4 The buoy 3 is connected with a traction rope 5, which can be made of nylon material. The end of the traction rope 5 away from the buoy 3 is connected to the inner wall of the weir plate 1 and the weir groove 11. Connecting the buoy 3 with the traction rope 5 can prevent the buoy 3 from detaching from the weir plate 1, thereby improving the convenience of use. Moreover, through the connection of the traction rope 5, the floating of the buoy 3 in the measuring groove 2 can be made more stable, thereby better reading the water level scale.
[0040] Reference Figure 4 A rope reel 6 is also connected to the outer surface of the weir plate 1. The rope reel 6 is used to reel in the traction rope 5. A guide ring 7 for the traction rope 5 to pass through is provided at the bottom of the weir groove 11 of the weir plate 1. The guide ring 7 is fixedly installed on the side of the weir plate 1 that is not connected to the limit bar 4. The rope reel 6 includes a roller 61 and a locking member 62. The roller 61 is rotatably connected to the upper part of the weir plate 1 near the middle. A handle 612 is provided at one end of the roller 61 away from the weir plate 1 for easy rotation. A locking portion 611 is provided at one end of the roller 61 near the weir plate 1. The locking member 62 passes through the locking portion 611 and is threadedly connected to the weir plate 1. The locking member 62 is preferably a butterfly bolt. The traction rope 5 extends out from the rope reel 6 and passes through the guide ring 7 and then is connected to the buoy 3. When the triangular weir is not used, the traction line can be firstly wound around the roller 61 and then the roller 61 is fixed with the locking piece 62, so that the traction rope 5 will not be knotted; when the triangular weir is used, it is only necessary to rotate and unscrew the locking piece 62. As the water level continues to rise, the buoy 3 floats upward without pulling out the traction rope 5. The rope reel 6 still has a certain pulling force on the traction rope 5, so that the buoy 3 can float up more stably.
[0041] The implementation principle of a water flow measurement triangular weir in the embodiment of the present application is:
[0042] When in use, the measuring triangular weir is fixed in the stream. At this time, the rope reel 6 needs to be located on the backstream side. After a period of time, the stream will gradually rise to pass through the weir groove 11 and stabilize the water level. The water level in the measuring groove 2 is also consistent with the water level passing through the weir groove 11. The buoy 3 floats on the water surface in the measuring groove 2. The limit bar 4 prevents the buoy 3 from escaping from the measuring groove 2. Through the position of the buoy 3, the staff can directly and conveniently read the corresponding mark scale value on the limit bar 4, thereby realizing accurate measurement of the water flow and reducing measurement errors.
[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A triangular weir for measuring water flow, comprising a weir plate (1), wherein the weir plate (1) is provided with a triangular weir groove (11); the characteristics are: The inner side wall of the weir groove (11) is provided with a measuring groove (2) connected to the weir groove (11) along the length direction, a buoy (3) is slidably connected in the measuring groove (2), and a limit bar (4) is provided in the weir plate (1) for limiting the buoy (3) from escaping from the measuring groove (2) into the weir groove (11), and a scale for indicating the water level is marked on the limit bar (4) along the length direction.
2. A triangular weir for measuring water flow according to claim 1, characterized in that: The buoy (3) is in the shape of a thin plate.
3. A water flow measurement triangular weir according to claim 1 or 2, characterized in that: The buoy (3) is connected to a traction rope (5), and one end of the traction rope (5) away from the buoy (3) is connected to the inner wall of the weir plate (1) on the weir groove (11).
4. A triangular weir for measuring water flow according to claim 3, characterized in that: A rope reel (6) is connected to the outer surface of the weir plate (1), and the rope reel (6) is used to reel in the traction rope (5). The weir plate (1) is provided with a guide ring (7) at the bottom of the weir groove (11) for the traction rope (5) to pass through.
5. A triangular weir for measuring water flow according to claim 4, characterized in that: The rope reel (6) comprises a roller (61) and a locking member (62); the roller (61) is rotatably connected to the weir plate (1); a locking portion (611) is provided at one end of the roller (61) close to the weir plate (1); and the locking member (62) is threadedly connected to the weir plate (1) after passing through the locking portion (611).
6. A triangular weir for measuring water flow according to claim 1, characterized in that: The connecting point between the measuring groove (2) and the weir groove (11) is covered with a filter screen (8).
7. A triangular weir for measuring water flow according to claim 1, characterized in that: The number of the limit bars (4) is two and they are symmetrically arranged about the narrow side center plane of the weir plate (1); the measuring groove (2) is formed between the two limit bars (4); the limit bars (4) include a side plate (41) connected to the weir plate (1) and a baffle plate (42) bent and connected to the side plate (41); a gap communicating with the weir groove (11) is formed between the baffle plates (42) of the two limit bars (4).
8. A triangular weir for measuring water flow according to claim 7, characterized in that: The limiting strip (4) is detachably connected to the weir plate (1).