Hydraulic model flow testing device suitable for large variable-amplitude flow

Abstract

The utility model belongs to the technical field of hydraulic model flow testing, and particularly relates to a hydraulic model flow testing device suitable for large variable-amplitude flow. The device comprises an open channel, an infrared distance meter, a weir plate lifting control mechanism, a triangular weir plate, a rectangular weir plate and a water blocking plate, the infrared distance meter is connected to the open channel; the triangular weir plate, the rectangular weir plate and the water blocking plate are sequentially arranged in the water flowing direction and are perpendicular to the inner side wall of the open channel. A sealed space is defined by the bottom of the rectangular weir plate, the triangular weir plate, the water blocking plate and the open channel, and a weir plate lifting control mechanism is connected into the sealed space. Through the arrangement of the rectangular weir plate of which the height can be adjusted up and down, the device can adapt to the acquisition of the numerical value of the water head on the weir at different water flows, facilitates the subsequent calculation of the test flow, and does not need to be replaced. According to the utility model, the test flow range is large, the precision is high, and the working efficiency is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic model flow testing technology, specifically relating to a hydraulic model flow testing device that adapts to large flow ranges. Background Technology

[0002] Traditional hydraulic model tests mostly involve measuring the test flow rate using a measuring weir. When the inflow rate equals the outflow rate, the water level inside the weir reaches a stable level. The head above the weir is measured using a measuring needle, and the test flow rate can then be calculated using a formula.

[0003] Commonly used water measuring weirs are rectangular weirs and triangular weirs. Rectangular weirs use rectangular weir plates and have higher accuracy for large flow rates, making them suitable for measuring large flow rates. Triangular weirs use triangular weir plates and have higher accuracy for testing small flow rates, making them suitable for measuring small flow rates.

[0004] During hydraulic model tests, the required test flow rate often varies greatly (e.g., in diversion and interception tests, the diversion flow rate is larger, while the interception flow rate is smaller). It is necessary to change the test weir plate according to the flow rate. However, traditional rectangular weir plates are fixed to the side wall of the measuring weir, which is not easy to replace, has great limitations, and has defects such as high manpower consumption and low work efficiency. Utility Model Content

[0005] This invention provides a flow testing device for hydraulic models that can adapt to large-amplitude flow rates, thereby improving the technical problems of traditional rectangular weir plates, such as fixed weir plates, difficulty in replacement, large limitations, high manpower consumption, and low work efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A flow testing device for a hydraulic model adapted to large flow amplitude includes an open channel, an infrared rangefinder, a weir plate lifting control mechanism, a triangular weir plate, a rectangular weir plate, and a water-blocking plate. The infrared rangefinder is connected to the open channel. The triangular weir plate, the rectangular weir plate, and the water-blocking plate are arranged sequentially from the flow direction and are perpendicular to the inner wall of the open channel. The bottom of the rectangular weir plate, the triangular weir plate, the water-blocking plate, and the open channel form a sealed space, and the weir plate lifting control mechanism is connected within the sealed space.

[0008] The open channel includes a measuring weir sidewall and a measuring weir bottom plate; two measuring weir sidewalls are provided; the two measuring weir sidewalls and the measuring weir bottom plate form a right-angled U-shaped channel.

[0009] It also includes a fixed crossbar; the fixed crossbar is horizontally connected between the upper part of the two measuring weir side walls; the infrared rangefinder is connected to the fixed crossbar.

[0010] The weir plate lifting control mechanism includes a telescopic rod controller, a control circuit, and multiple electrically controlled telescopic rods; the multiple electrically controlled telescopic rods are fixedly connected to the bottom of the open channel, and their output ends are respectively connected to the bottom of the rectangular weir plate; the telescopic rod controller and the control circuit are respectively connected to the outer wall of the open channel, and the telescopic rod controller is connected to the multiple electrically controlled telescopic rods through the control circuit.

[0011] The triangular weir plate is a vertically placed thin-walled plate-like structure with a groove in the middle of its top. The width of the triangular weir plate is the same as the width of the open channel, and the height of the triangular weir plate is less than the height of the open channel but greater than the height of the water-blocking plate. The bottom of the triangular weir plate is fixedly connected to the bottom of the open channel, and the two sides of the triangular weir plate are fixedly connected to the two side walls of the open channel, respectively.

[0012] The groove is a triangular groove.

[0013] The angle between the two sides of the triangular groove is 90°.

[0014] The rectangular weir plate is a vertically placed rectangular thin-walled plate structure; the width of the rectangular weir plate is the same as the width inside the open channel, and its height is less than the height of the triangular weir plate; water-blocking rubber strips are provided around the bottom of the rectangular weir plate; the bottom of the rectangular weir plate is fixedly connected to multiple electrically controlled telescopic rods, and the two sides of the rectangular weir plate are respectively connected to the two side walls of the open channel.

[0015] The water-blocking plate is a vertically placed rectangular thin-walled plate; the height of the water-blocking plate is less than the height of the triangular weir plate; the width of the water-blocking plate is the same as the width of the open channel; the bottom of the water-blocking plate is fixedly connected to the bottom of the open channel, and the two sides of the water-blocking plate are fixedly connected to the two side walls of the open channel respectively.

[0016] The rectangular weir plate is tightly fitted between the triangular weir plate and the water-blocking plate. Beneficial effects

[0017] 1. The rectangular weir plate of this utility model is adjustable and does not need to be replaced.

[0018] 2. This utility model has a wide testing flow range, high accuracy, and greatly improves work efficiency.

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of the present invention.

[0022] Figure 2 This is a three-dimensional view of the weir plate of this utility model.

[0023] Figure 3 This is a schematic diagram of the internal structure of the weir plate of this utility model.

[0024] Figure 4 This is a cross-sectional view of the water level when the water level is lower than the triangular weir plate during the use of this utility model.

[0025] Figure 5 This is a cross-sectional view of the water level when the water level is higher than the triangular weir plate during the use of this utility model.

[0026] In the diagram: 1. Infrared rangefinder; 2. Fixed crossbar; 3. Telescopic pole controller; 4. Control circuit; 5. Electrically controlled telescopic pole; 6. Weir sidewall; 7. Triangular weir plate; 8. Rectangular weir plate; 9. Water-blocking plate; 10. Weir bottom plate; 11. Water-blocking rubber strip; 12. Open channel; 13. Zero point position of triangular weir plate; 14. Zero point position of rectangular weir plate; 15. Groove.

[0027] Where: H1 is the distance from the zero point of the triangular weir to the infrared rangefinder; H2 is the distance from the water surface to the infrared rangefinder when using the triangular weir (the water surface height does not exceed the weir plate); H3 is the distance from the zero point of the rectangular weir to the infrared rangefinder; H4 is the distance from the water surface to the infrared rangefinder when using the rectangular weir. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1:

[0029] according to Figures 1-3The device shown is a hydraulic model flow testing device adapted to large flow amplitude, including an open channel 12, an infrared rangefinder 1, a weir plate lifting control mechanism, a triangular weir plate 7, a rectangular weir plate 8, and a water-blocking plate 9; the infrared rangefinder 1 is connected to the open channel 12; the triangular weir plate 7, the rectangular weir plate 8, and the water-blocking plate 9 are arranged sequentially from the flow direction and are perpendicular to the inner wall of the open channel 12 respectively; the bottom of the rectangular weir plate 8, the triangular weir plate 7, the water-blocking plate 9, and the open channel 12 form a sealed space, and the weir plate lifting control mechanism is connected in the sealed space.

[0030] Infrared rangefinder 1 is used to measure the distance between the water surface and infrared rangefinder 1.

[0031] The specific process of traffic testing is as follows:

[0032] When the flow rate is low, the rectangular weir plate 8 is controlled to be lower than the zero point 13 of the triangular weir plate by the weir plate lifting control mechanism, and the water flows through the triangular weir plate 7. The water head above the weir is the distance H1 from the infrared rangefinder 1 to the zero point of the triangular weir plate 7 minus the reading H2 of the infrared rangefinder 1. When the flow rate is high, the top side of the rectangular weir plate 8 is controlled to be higher than the triangular weir plate 7 by the weir plate lifting control mechanism, and the water flows through the rectangular weir plate 8. The water head above the weir is the distance H3 from the infrared rangefinder 1 to the zero point 14 of the rectangular weir plate minus the reading H4 of the infrared rangefinder 1. The test flow rate can be calculated by substituting the water head value above the weir into the formula in the prior art.

[0033] In some embodiments, the open channel 12 includes a measuring weir sidewall 6 and a measuring weir bottom plate 10; two measuring weir sidewalls 6 are provided; the two measuring weir sidewalls 6 and the measuring weir bottom plate 10 form a right-angled U-shaped channel.

[0034] Furthermore, it also includes a fixed crossbar 2; the fixed crossbar 2 is horizontally connected between the upper parts of the two measuring weir sidewalls 6; the infrared rangefinder 1 is connected to the fixed crossbar 2.

[0035] In some embodiments, the weir plate lifting control mechanism includes a telescopic rod controller 3, a control circuit 4, and multiple electrically controlled telescopic rods 5; the multiple electrically controlled telescopic rods 5 are fixedly connected to the bottom of the open channel 12, and their output ends are respectively connected to the bottom of the rectangular weir plate 8; the telescopic rod controller 3 and the control circuit 4 are respectively connected to the outer wall of the open channel 12, and the telescopic rod controller 3 is connected to the multiple electrically controlled telescopic rods 5 through the control circuit 4.

[0036] The specific traffic testing process is as follows:

[0037] At low flow rates, the telescopic rod controller 3 controls the electrically controlled telescopic rod 5 to be in a retracted state, so that the rectangular weir plate 8 is lower than the zero point of the triangular weir plate 7. The water flows through the triangular weir plate 7, and the water head above the weir is the distance H1 from the infrared rangefinder 1 to the zero point of the triangular weir plate 7 minus the reading H2 of the infrared rangefinder 1. At high flow rates, the telescopic rod controller 3 controls the electrically controlled telescopic rod 5 to be in an extended state, so that the top side of the rectangular weir plate 8 is higher than the triangular weir plate 7. The water flows through the rectangular weir plate 8, and the water head above the weir is the distance H3 from the infrared rangefinder 1 to the zero point of the rectangular weir plate 8 minus the reading H4 of the infrared rangefinder 1. The test flow rate can be calculated by substituting the water head value above the weir into the formula in the prior art.

[0038] In some embodiments, the triangular weir plate 7 is a vertically placed thin-walled plate-like structure with a groove 15 in the middle of its top; the width of the triangular weir plate 7 is the same as the width inside the open channel 12, and the height of the triangular weir plate 7 is less than the height of the open channel 12 but greater than the height of the water-blocking plate 9; the bottom of the triangular weir plate 7 is fixedly connected to the bottom of the open channel 12, and the two sides of the triangular weir plate 7 are fixedly connected to the two side walls of the open channel 12 respectively.

[0039] Furthermore, the groove 15 is a triangular groove.

[0040] Furthermore, the angle between the two sides of the triangular groove is 90°.

[0041] In actual use, this value is fixed. The angle between the two sides of the triangular groove is designed to be 90°, and the flow rate can be easily calculated using empirical formulas.

[0042] In some embodiments, the rectangular weir plate 8 is a vertically placed rectangular thin-walled plate structure; the width of the rectangular weir plate 8 is the same as the width inside the open channel 12, and its height is less than the height of the triangular weir plate 7; water-blocking rubber strips 11 are provided around the bottom of the rectangular weir plate 8; the bottom of the rectangular weir plate 8 is fixedly connected to multiple electrically controlled telescopic rods 5, and the two sides of the rectangular weir plate 8 are respectively connected to the two side walls of the open channel 12.

[0043] The rectangular weir plate 8 adopts the above-mentioned technical solution to ensure that when the flow rate is small, the rectangular weir plate 8 is controlled by the weir plate lifting control mechanism to be lower than the zero point of the triangular weir plate 7. When the flow rate is large, the rectangular weir plate 8 is controlled by the weir plate lifting control mechanism to be higher than the triangular weir plate 7 on the top side, so as to obtain the water head value above the weir and facilitate the subsequent calculation of the test flow rate.

[0044] The water-blocking rubber strip 11 effectively prevents water from seeping into the sealed space formed by the bottom of the rectangular weir plate 8, the triangular weir plate 7, the water-blocking plate 9, the water measuring weir side wall 6 and the water measuring weir bottom plate 10 in the open channel 12, ensuring that the weir plate lifting control mechanism always maintains good operating condition.

[0045] In some embodiments, the water-blocking plate 9 is a vertically placed rectangular thin-walled plate; the height of the water-blocking plate 9 is less than the height of the triangular weir plate 7; the width of the water-blocking plate 9 is the same as the width inside the open channel 12; the bottom of the water-blocking plate 9 is fixedly connected to the bottom of the open channel 12, and the two sides of the water-blocking plate 9 are respectively fixedly connected to the two side walls of the open channel 12.

[0046] The purpose of setting up the water-blocking plate 9 is to form a sealed space with the bottom of the weir plate 8, the triangular weir plate 7, the water-blocking plate 9, the two side walls 6 of the weir and the bottom plate 10 of the weir in the open channel 12, thereby ensuring that the electrically controlled telescopic rod 5 in the weir plate lifting control mechanism is always in a good operating condition and extending its service life.

[0047] In some embodiments, the rectangular weir plate 8 is tightly fitted between the triangular weir plate 7 and the water-blocking plate 9.

[0048] The rectangular weir plate 8, the triangular weir plate 7, and the water-blocking plate 9 adopt the above-mentioned technical solutions, making it easier to realize the sealed space enclosed by the triangular weir plate 7, the water-blocking plate 9, the two side walls 6 of the measuring weir and the bottom plate 10 of the measuring weir of the open channel 12. Example 2:

[0049] according to Figures 1-3 The device shown is a hydraulic model flow test device adapted to large flow amplitude, including a weir bottom plate 10. The weir bottom plate 10 is spliced ​​with the weir side walls 6 on the left and right sides to form an open channel 12. Fixed crossbars 2 are welded to the top of the left and right weir side walls 6. An infrared rangefinder 1 is installed on the fixed crossbar 2 to measure the distance between the water surface and the infrared rangefinder 1.

[0050] The triangular weir plate 7 and the water-blocking plate 9 are fixed to the bottom plate 10 of the weir and spliced ​​with the side wall 6 of the measuring weir to form an open channel 12. The edge of the triangular weir plate 7 is spliced ​​with the bottom plate 10 of the weir and the left and right side walls 6 of the measuring weir to block the water from seeping out.

[0051] A rectangular weir plate 8 is tightly fitted between the triangular weir plate 7 and the water-blocking plate 9. Water-blocking rubber strips 11 are attached around the bottom of the rectangular weir plate 8 to prevent water from flowing in and seeping. Four electrically controlled telescopic rods 5 are connected to the bottom of the rectangular weir plate 8 and are fixed on the bottom plate 10 of the weir.

[0052] A telescopic rod controller 3 is fixed on the outer wall of the weir sidewall 6. The telescopic rod controller 3 is connected to the electrically controlled telescopic rod 5 through the control circuit 4.

[0053] The rectangular weir plate 8 of this invention can be adjusted up and down to adapt to different water flow rates when obtaining the water head value on the weir, which facilitates the subsequent calculation of the test flow rate without the need for replacement.

[0054] This invention offers a wide testing flow range, high accuracy, and significantly improves work efficiency.

[0055] Where there is no conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effects. Specific details of the various combinations will not be elaborated here.

[0056] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0057] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0058] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent variations, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. A flow testing device for a hydraulic model adapted to large-amplitude flow rates, characterized in that: The system includes an open channel (12), an infrared rangefinder (1), a weir plate lifting control mechanism, a triangular weir plate (7), a rectangular weir plate (8), and a water-blocking plate (9); the infrared rangefinder (1) is connected to the open channel (12); the triangular weir plate (7), the rectangular weir plate (8), and the water-blocking plate (9) are arranged sequentially from the direction of water flow and are perpendicular to the inner wall of the open channel (12); the bottom of the rectangular weir plate (8) and the triangular weir plate (7), the water-blocking plate (9), and the open channel (12) form a sealed space, and the weir plate lifting control mechanism is connected in the sealed space.

2. The hydraulic model flow testing device adapted to large-amplitude flow rates as described in claim 1, characterized in that: The open channel (12) includes a measuring weir sidewall (6) and a measuring weir bottom plate (10); two measuring weir sidewalls (6) are provided; the two measuring weir sidewalls (6) and the measuring weir bottom plate (10) form a right-angled U-shaped channel.

3. The hydraulic model flow testing device adapted to large flow amplitude as described in claim 2, characterized in that: It also includes a fixed crossbar (2); the fixed crossbar (2) is horizontally connected between the upper parts of the two measuring weir sidewalls (6); the infrared rangefinder (1) is connected to the fixed crossbar (2).

4. The hydraulic model flow testing device adapted to large-amplitude flow rates as described in claim 1, characterized in that: The weir plate lifting control mechanism includes a telescopic rod controller (3), a control circuit (4), and multiple electrically controlled telescopic rods (5); the multiple electrically controlled telescopic rods (5) are fixedly connected to the bottom of the open channel (12), and their output ends are respectively connected to the bottom of the rectangular weir plate (8); the telescopic rod controller (3) and the control circuit (4) are respectively connected to the outer wall of the open channel (12), and the telescopic rod controller (3) is connected to the multiple electrically controlled telescopic rods (5) through the control circuit (4).

5. The hydraulic model flow testing device adapted to large-amplitude flow rates as described in claim 1, characterized in that: The triangular weir plate (7) is a vertically placed thin-walled plate structure with a groove (15) in the middle of its top. The width of the triangular weir plate (7) is the same as the width of the open channel (12). The height of the triangular weir plate (7) is less than the height of the open channel (12) and greater than the height of the water-blocking plate (9). The bottom of the triangular weir plate (7) is fixedly connected to the bottom of the open channel (12), and the two sides of the triangular weir plate (7) are fixedly connected to the two side walls of the open channel (12).

6. The hydraulic model flow testing device adapted to large flow amplitude as described in claim 5, characterized in that: The groove (15) is a triangular groove.

7. The hydraulic model flow testing device adapted to large flow amplitude as described in claim 6, characterized in that: The angle between the two sides of the triangular groove is 90°.

8. A flow testing device for a hydraulic model adapted to large-amplitude flow rates as described in claim 1 or 4, characterized in that: The rectangular weir plate (8) is a vertically placed rectangular thin-walled plate structure; the width of the rectangular weir plate (8) is the same as the width inside the open channel (12), and its height is less than the height of the triangular weir plate (7); water-blocking rubber strips (11) are provided around the bottom of the rectangular weir plate (8); the bottom of the rectangular weir plate (8) is fixedly connected to multiple electrically controlled telescopic rods (5), and the two sides of the rectangular weir plate (8) are respectively connected to the two side walls of the open channel (12).

9. A flow testing device for a hydraulic model adapted to large-amplitude flow rates as described in claim 1 or 5, characterized in that: The water-blocking plate (9) is a vertically placed rectangular thin-walled plate; the height of the water-blocking plate (9) is less than the height of the triangular weir plate (7); the width of the water-blocking plate (9) is the same as the width inside the open channel (12); the bottom of the water-blocking plate (9) is fixedly connected to the bottom of the open channel (12), and the two sides of the water-blocking plate (9) are fixedly connected to the two side walls of the open channel (12) respectively.

10. The hydraulic model flow testing device adapted to large-amplitude flow rates as described in claim 1, characterized in that: The rectangular weir plate (8) is tightly fitted between the triangular weir plate (7) and the water-blocking plate (9).

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