Portable calibration device for hydraulic structure measuring flume

Abstract

The utility model relates to the technical field of hydraulic engineering measurement, disclose a kind of portable calibrating device of hydraulic structure measuring flow tank, including support tripod and the telescopic cross bar being set in top, still include angle adjusting mechanism being installed in telescopic cross bar end, flow sensor is connected with telescopic cross bar by angle adjusting mechanism, angle adjusting mechanism includes pitch adjusting component and horizontal adjusting component connected in series, respectively through the relative rotation of pivot and shell and the locking structure of spring cooperation end surface sawtooth, realize the multi-degree-of-freedom adjustment of connecting rod one and connecting rod two, telescopic cross bar still be equipped with the line binding mechanism with reset spring and movable buckle. The utility model through telescopic cross bar adapts to different width measuring flow tank, using double-shaft angle adjusting mechanism ensures that sensor is vertically aligned liquid surface, and cable is arranged by line binding mechanism, solve the problem of poor adaptability, low adjustment precision and cable interference, improve the calibrating efficiency and data accuracy.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering measurement technology, and in particular to a portable calibration device for a flow measuring channel of a hydraulic structure. Background Technology

[0002] In agricultural irrigation, urban water supply, and water resource management, flow measurement flumes (such as Parshall flumes and throatless flumes) are widely used flow measurement facilities. To ensure the accuracy and impartiality of the measurement data from these facilities, regular on-site verification and calibration are essential and important aspects of water conservancy monitoring.

[0003] On-site verification typically requires staff to carry high-precision standard flow sensors (such as ultrasonic or radar probes) and set them up above the center of the liquid surface in the flow measurement tank for comparative measurements. However, the environment at field flow measurement sites is extremely complex. Different flow measurement tanks have vastly different channel widths, ranging from tens of centimeters to several meters. Moreover, many channel edges are not hardened or the ground is uneven. Most existing verification support equipment has a relatively fixed structure and lacks sufficient flexibility to stably span over flow measurement tanks of different widths.

[0004] More importantly, non-contact flow sensors have extremely high requirements for installation posture. They must be strictly vertically aligned with the liquid surface to ensure the accuracy of signal transmission and reception. However, in actual operation, uneven ground causes the support frame to tilt, or the sensor is often difficult to keep naturally vertical due to limited on-site installation conditions. Existing simple supports usually lack a fine angle adjustment mechanism. Workers can only roughly adjust the angle by placing stones under the tripod or repeatedly moving the support position. This method is not only time-consuming and laborious, but also makes it extremely difficult to achieve accurate positioning of the sensor's pitch and horizontal orientation, which leads to deviations in the calibration data and seriously affects the efficiency and accuracy of flow measurement work.

[0005] Therefore, this utility model proposes a portable calibration device for flow measurement channels of hydraulic structures to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a portable calibration device for flow measurement channels of hydraulic structures, aiming to improve the problems of poor adaptability, low adjustment accuracy and chaotic cable management in some existing calibration devices for flow measurement channels of hydraulic structures.

[0007] This utility model provides a portable calibration device for a flow measurement channel of a hydraulic structure, comprising: a support tripod, a telescopic crossbar disposed on the top of the support tripod, and a flow measurement sensor.

[0008] The portable calibration device also includes an angle adjustment mechanism installed at the end of the telescopic crossbar. The flow sensor is connected to the telescopic crossbar through the angle adjustment mechanism, thereby adjusting its position and attitude through a mechanical transmission chain.

[0009] Specifically, the angle adjustment mechanism includes a pitch adjustment component, a first connecting rod, a second horizontal adjustment component, and a third connecting rod.

[0010] The pitch adjustment assembly includes an adjustment housing and a rotating shaft rotatably connected within the adjustment housing. The adjustment housing is fixedly connected to the end of the telescopic crossbar, serving as the basic support point for the adjustment mechanism.

[0011] Furthermore, one end of the connecting rod is fixedly connected to one end of the rotating shaft extending out of the adjusting shell, and the other end of the connecting rod is connected to the horizontal adjusting assembly for transmitting the first-stage rotational motion.

[0012] The horizontal adjustment assembly includes an adjustment housing and a rotating shaft rotatably connected within the adjustment housing. The adjustment housing is fixedly connected to the end of the connecting rod away from the rotating shaft.

[0013] One end of the connecting rod 2 is fixedly connected to one end of the rotating shaft 2 extending from the adjusting shell 2, and the other end of the connecting rod 2 is fixedly connected to the flow sensor, thereby driving the flow sensor to perform a second-stage rotation.

[0014] Preferably, the pitch adjustment assembly further includes a sawtooth block and a spring. The sawtooth block is fixedly sleeved on one end of the rotating shaft located in the inner cavity of the adjustment housing. The inner wall of the adjustment housing and the contact surface of the sawtooth block are provided with interlocking end face sawtooths. The spring abuts against the inner wall of the adjustment housing and the sawtooth block, and the spring's restoring force presses the sawtooth block against the adjustment housing, thereby locking the angle through tooth surface meshing.

[0015] Preferably, the horizontal adjustment assembly further includes a second sawtooth block and a second spring. The second sawtooth block is fixedly sleeved on one end of the second rotating shaft located in the inner cavity of the second adjustment shell. The inner wall of the second adjustment shell and the contact surface of the second sawtooth block are provided with interlocking end face sawtooths. The second spring abuts against the inner wall of the second adjustment shell and the second sawtooth block to press the second sawtooth block against the second adjustment shell, thereby locking the second-level adjustment angle.

[0016] Preferably, the axial direction of the first rotating shaft is perpendicular to the axial direction of the second rotating shaft, thereby providing pitch angle adjustment function and horizontal azimuth angle adjustment function respectively, ensuring that the flow sensor can be aligned with the flow measurement target from all directions.

[0017] Preferably, a wire harnessing mechanism is also fixedly installed on the outer wall of the telescopic crossbar. The wire harnessing mechanism includes a fixing block, a wire harness ring, a snap fastener, a movable snap fastener, and a return spring. The fixing block is fixed to the telescopic crossbar, and the wire harness ring and the snap fastener are both fixedly installed on the fixing block.

[0018] Preferably, the movable buckle is rotatably connected to the buckle support, and the return spring is sleeved on the connecting shaft between the movable buckle and the buckle support. Under the action of the return spring, the movable buckle and the cable tie ring cooperate to maintain a closed state, so as to form a closed cable receiving space.

[0019] Preferably, the portable calibration device further includes a control and display terminal and a signal cable. One end of the signal cable is connected to the current sensor, and the other end of the signal cable is connected to the control and display terminal. The signal cable passes through the closed space formed by the cable tie and the movable buckle, and is thus neatly fixed next to the telescopic crossbar.

[0020] Preferably, the telescopic crossbar includes at least two interlocking tube sections, and a locking element is provided on the telescopic crossbar to fix the position of the telescopic crossbar after the length is adjusted, so as to adapt to different span installation environments.

[0021] This utility model has the following beneficial effects: 1. This utility model solves the problem that existing calibration devices have a fixed structure and are difficult to adapt to flow measurement channels of different widths on site by setting a support tripod and an adjustable telescopic crossbar. It achieves the technical effect of flexibly covering the area above flow measurement channels of various specifications, being easy to carry and assemble, and providing stable support on site.

[0022] 2. This utility model, by setting an angle adjustment mechanism including a pitch adjustment component and a horizontal adjustment component, and using a locking method of spring reset and end face sawtooth engagement, solves the problem of difficulty in adjusting the attitude of the flow sensor in the existing device and difficulty in vertically aligning it with the liquid surface, resulting in large measurement errors. It achieves the technical effect of enabling precise adjustment of the flow sensor in multiple degrees of freedom in pitch and horizontal orientation, and after adjustment, it is firmly locked, with strong wind and shock resistance, thereby improving the calibration accuracy.

[0023] 3. This utility model solves the problem of messy signal cables that are prone to falling into the liquid being measured, causing flow interference or equipment damage, by setting a cable-binding mechanism with movable buckles and return springs on the telescopic crossbar. It achieves the technical effect of quickly organizing and securing the cable position, preventing cable slippage, and ensuring the safety and standardization of measurement operations. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of a portable calibration device for a hydraulic structure flow measuring channel proposed in this utility model; Figure 2 This is a schematic diagram of the angle adjustment mechanism of a portable calibration device for a hydraulic structure flow measuring channel proposed in this utility model. Figure 3 This is a schematic diagram of the pitch adjustment component of a portable calibration device for a hydraulic structure flow measuring channel proposed in this utility model. Figure 4 This is a schematic diagram of the wiring mechanism of a portable calibration device for a hydraulic structure flow measuring channel proposed in this utility model. Figure 5 This is a schematic diagram of the movable buckle of a portable calibration device for a hydraulic structure flow measuring channel proposed in this utility model.

[0025] Legend: 1. Tripod support; 2. Telescopic crossbar; 3. Angle adjustment mechanism; 31. Pitch adjustment assembly; 311. Adjustment housing 1; 312. Rotating shaft 1; 313. Serrated block 1; 314. Spring 1; 32. Connecting rod one; 33. Horizontal adjustment assembly; 331. Adjustment housing two; 332. Rotating shaft two; 333. Serrated block two; 334. Spring two; 34. Connecting rod two; 4. Flow sensor; 5. Signal cable; 6. Cable harness mechanism; 61. Fixing block; 62. Cable harness ring; 63. Clip support; 64. Movable clip; 65. Return spring; 7. Control and display terminal. Detailed Implementation

[0026] 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.

[0027] Example: Reference Figures 1 to 5 This utility model provides a portable calibration device for a flow measuring channel of a hydraulic structure, which aims to solve the problems existing in the prior art, such as the difficulty of the flow measuring device to adapt to flow measuring channels of different widths, insufficient accuracy of sensor angle adjustment, and the lack of effective fixation of signal cables leading to drooping interference in measurement.

[0028] like Figure 1 and Figure 2 As shown, a portable calibration device for a flow measurement channel of a hydraulic structure includes a support tripod 1 and a telescopic crossbar 2 set on top of the support tripod 1. The support tripod 1 serves as the mounting base for the entire device and is used to provide stable support when erected on the ground next to the flow measurement channel. The telescopic crossbar 2 is composed of at least two interlocking tube sections. By telescopic adjustment, it can cover the area above the flow measurement channel of different widths. In order to ensure the stability after telescopic adjustment, a locking knob is provided on the outer wall of the telescopic crossbar 2. By tightening the locking knob, radial pressure can be applied to the inner tube, thereby locking the relative position between the tube sections and ensuring that the telescopic crossbar 2 has sufficient rigidity after the length is adjusted.

[0029] like Figure 2 and Figure 3 As shown, in order to achieve multi-degree-of-freedom attitude adjustment of the flow sensor 4, an angle adjustment mechanism 3 is installed at the end of the telescopic crossbar 2. The flow sensor 4 is connected to the telescopic crossbar 2 through the angle adjustment mechanism 3. The angle adjustment mechanism 3 as a whole constitutes a mechanical transmission chain from the telescopic crossbar 2 to the flow sensor 4, which specifically includes a pitch adjustment component 31, a connecting rod 1 32, a horizontal adjustment component 33, and a connecting rod 2 34.

[0030] The pitch adjustment assembly 31 mainly consists of an adjustment housing 311, a rotating shaft 312, a sawtooth block 313, and a spring 314. The adjustment housing 311 is fixedly installed at the cantilever end of the telescopic crossbar 2, serving as a fixed-point support component for angle adjustment. The rotating shaft 312 is rotatably connected to the internal cavity of the adjustment housing 311, with one end extending to the outside of the adjustment housing 311 and fixedly connected to one end of the connecting rod 32, thereby transmitting the rotational motion of the pitch adjustment assembly 31 to subsequent components. To achieve angle locking and adjustment, the sawtooth block 313 is fixedly sleeved on one end of the rotating shaft 312 located within the internal cavity of the adjustment housing 311, ensuring that the sawtooth block 313 can only rotate with the rotating shaft 312 and cannot rotate independently. In relative rotation, the inner wall of the adjusting shell 311 and the relative contact surface of the sawtooth block 313 are provided with interlocking end face saw teeth. The end face saw teeth are distributed radially, and the tooth shape is designed as a trapezoid or triangle for easy engagement and disengagement. The spring 314 is a high-strength compression spring, which abuts against the inner wall of the adjusting shell 311 and the sawtooth block 313. The spring force presses the sawtooth block 313 tightly against the inner wall of the adjusting shell 311, so that the end face saw teeth are tightly engaged, thereby restricting the free rotation of the rotating shaft 312 to lock the angle. When adjustment is required, the rotating shaft 312 is pressed inward to overcome the resistance of the spring 314, so that the sawtooth block 313 is separated from the tooth surface of the adjusting shell 311, and the rotating shaft 312 can be rotated to adjust the angle.

[0031] Connecting rod 32 serves as an intermediate transmission component. Its end furthest from rotating shaft 312 is fixedly connected to the horizontal adjustment assembly 33. The horizontal adjustment assembly 33 adopts the same structural design as the pitch adjustment assembly 31 to simplify the manufacturing process and unify the operating logic. The horizontal adjustment assembly 33 includes an adjustment housing 331, a rotating shaft 332, a serrated block 333, and a spring 334. The adjustment housing 331 is fixedly connected to the end of connecting rod 32, and the rotating shaft 332 is rotatably connected inside the adjustment housing 331. The second sawtooth block 333 is fixedly sleeved on the second rotating shaft 332 at one end of the inner cavity of the second adjusting shell 331. The inner wall of the second adjusting shell 331 and the contact surface of the second sawtooth block 333 are also provided with intermeshing end face sawtooth. The second spring 334 abuts against the inner wall of the second adjusting shell 331 and the second sawtooth block 333 to achieve pressing and locking. One end of the second rotating shaft 332 extending to the outside of the second adjusting shell 331 is fixedly connected to one end of the second connecting rod 34, and the other end of the second connecting rod 34 is fixedly connected to the flow sensor 4.

[0032] The axis of the first rotating shaft 312 is defined as horizontal, which is used to adjust the pitch angle of the flow sensor 4, while the axis of the second rotating shaft 332 is defined as vertical, which is used to adjust the horizontal orientation angle of the flow sensor 4. Through the cooperation of these two mutually perpendicular orthogonal rotating axes, the flow sensor 4 can cover any direction within the hemispherical space, thereby accurately aligning with the liquid surface of the flow tank under any complex flow conditions.

[0033] like Figure 1 , Figure 4 and Figure 5 As shown, a cable management mechanism 6 is also fixedly installed on the outer wall of the telescopic crossbar 2. The cable management mechanism 6 is used to organize and fix the signal cable 5 connected to the flow sensor 4, so as to prevent the cable from being too long and falling into the liquid being measured, causing interference or damage. The cable management mechanism 6 includes a fixing block 61, a cable management ring 62, a snap fastener 63, a movable snap fastener 64, and a return spring 65. The fixing block 61 is sleeved and fixed on the outer wall of the telescopic crossbar 2, serving as the basic support component of the entire cable management mechanism 6. The cable management ring 62 is fixedly installed on the top of the fixing block 61, and is in the shape of a semi-circular ring. One end of it is fixedly connected to the fixing block 61, and the other end forms an opening. The snap fastener 63 is also fixedly installed on the top of the fixing block 61 and is located near the opening side of the cable management ring 62.

[0034] The movable latch 64 is rotatably connected to the latch support 63 via a metal pin, allowing the movable latch 64 to rotate and open around the pin axis. The return spring 65 is a torsion spring, sleeved on the pin connecting the movable latch 64 and the latch support 63. The two ends of the return spring 65 abut against the latch support 63 and the movable latch 64 respectively, providing continuous restoring torque to the movable latch 64. Under the action of the return spring 65, the end of the movable latch 64 away from the latch support 63 naturally abuts against the opening of the cable tie ring 62, thereby forming a closed loop space with the cable tie ring 62 to limit the position of the signal cable 5 and prevent it from slipping.

[0035] It is also equipped with a control and display terminal 7. One end of the signal cable 5 is electrically connected to the flow sensor 4, and the other end passes through the closed space of the wire harness mechanism 6 and is electrically connected to the control and display terminal 7. The control and display terminal 7 is used to receive the data collected by the flow sensor 4, process it and display it intuitively, and provide data support for the verification work.

[0036] The implementation principle of this application embodiment is as follows: When using this device for on-site testing, the operator first sets up the support tripod 1 on a stable ground next to the flow measuring tank to be tested. According to the actual width of the flow measuring tank, the operator loosens the locking knob on the telescopic crossbar 2, stretches or retracts the tube of the telescopic crossbar 2 so that its length can span across the top of the flow measuring tank. After adjustment, the operator tightens the locking knob to fix the position of the telescopic crossbar 2.

[0037] Subsequently, in order to ensure that the flow sensor 4 can be vertically aligned with the liquid surface to obtain accurate measurement data, the operator uses the angle adjustment mechanism 3 to adjust the attitude. For adjusting the pitch angle, the operator presses the rotating shaft 312 of the pitch adjustment component 31 inward to overcome the resistance of the spring 314, so that the sawtooth block 313 disengages from the tooth surface of the adjustment shell 311. At this time, the rotating shaft 312 is unlocked. The operator rotates the rotating shaft 312 to drive the connecting rod 32 and subsequent components to rotate around the horizontal axis together. After adjusting to the appropriate pitch angle, the operator releases the rotating shaft 312. Under the restoring force of the spring 314, the sawtooth block 313 resets and re-engages with the adjustment shell 311, thereby locking the pitch angle.

[0038] The same procedure applies to adjusting the horizontal azimuth angle: Press the rotating shaft 332 of the horizontal adjustment component 33 to release the engagement and locking between the sawtooth block 333 and the adjusting shell 331. Rotate the rotating shaft 332 to drive the connecting rod 34 and the flow sensor 4 to rotate around the vertical axis. After adjusting the sensor to face the flow direction or a specific measurement point, release the rotating shaft 332. The spring 334 will push the sawtooth block 333 to reset and lock the horizontal angle.

[0039] Finally, in order to organize the signal cable 5, the operator presses down on the movable buckle 64 of the cable bundling mechanism 6 to open the opening of the cable bundling ring 62, puts the signal cable 5 into the ring, and then releases the hand. The reset spring 65 drives the movable buckle 64 to automatically spring back and close, restricting the signal cable 5 to the side of the telescopic crossbar 2. After completing all the settings, the control and display terminal 7 is started to begin data acquisition and verification work.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A portable calibration device for a flow measurement channel of a hydraulic structure, comprising a support tripod (1) and a telescopic crossbar (2) disposed on the top of the support tripod (1). Flow sensor (4); Its features are, It also includes an angle adjustment mechanism (3) installed at the end of the telescopic crossbar (2); The angle adjustment mechanism (3) includes a pitch adjustment component (31), a connecting rod one (32), a horizontal adjustment component (33), and a connecting rod two (34). The pitch adjustment assembly (31) includes an adjustment housing (311) and a rotating shaft (312) rotatably connected within the adjustment housing (311). The adjustment housing (311) is fixedly connected to the end of the telescopic crossbar (2). One end of the connecting rod (32) is fixedly connected to one end of the rotating shaft (312) extending out of the adjusting shell (311), and the other end of the connecting rod (32) is connected to the horizontal adjusting assembly (33). The horizontal adjustment assembly (33) includes an adjustment housing (331) and a rotating shaft (332) rotatably connected inside the adjustment housing (331). The adjustment housing (331) is fixedly connected to the end of the connecting rod (32) away from the rotating shaft (312). One end of the connecting rod (34) is fixedly connected to one end of the rotating shaft (332) extending out of the adjusting shell (331), and the other end of the connecting rod (34) is fixedly connected to the flow sensor (4).

2. The portable calibration device for a hydraulic structure flow metering flume according to claim 1, characterized in that, The pitch adjustment assembly (31) also includes a sawtooth block (313) and a spring (314). The serrated block (313) is fixedly sleeved on one end of the rotating shaft (312) located in the inner cavity of the adjusting shell (311); The inner wall of the adjusting shell (311) and the contact surface of the sawtooth block (313) are both provided with intermeshing saw teeth. The spring (314) abuts against the inner wall of the adjusting shell (311) and the sawtooth block (313) to press the sawtooth block (313) against the adjusting shell (311).

3. The portable calibration device for a flow metering flume of a hydraulic structure according to claim 2, characterized in that, The horizontal adjustment assembly (33) also includes a second sawtooth block (333) and a second spring (334). The second sawtooth block (333) is fixedly sleeved on one end of the second rotating shaft (332) located in the inner cavity of the second adjusting shell (331); The inner wall of the second adjusting shell (331) and the contact surface of the second sawtooth block (333) are both provided with intermeshing sawtooths. The second spring (334) abuts against the inner wall of the second adjusting shell (331) and the second sawtooth block (333) to press the second sawtooth block (333) against the second adjusting shell (331).

4. The portable calibration device for a flow metering flume of a hydraulic structure according to claim 3, characterized in that, The axial direction of the first rotating shaft (312) is perpendicular to the axial direction of the second rotating shaft (332).

5. A portable calibration device for a flow metering flume of a hydraulic structure according to claim 1, characterized in that, A wire harness mechanism (6) is also fixedly installed on the outer wall of the telescopic crossbar (2). The wire harness mechanism (6) includes a fixing block (61), a wire harness ring (62), a buckle support (63), a movable buckle (64), and a return spring (65). The fixing block (61) is fixed on the telescopic crossbar (2), and the wire harness (62) and the buckle support (63) are both fixed on the fixing block (61).

6. The portable calibration device for a flow metering flume of a hydraulic structure according to claim 5, characterized in that, The movable buckle (64) is rotatably connected to the buckle support (63), and the return spring (65) is sleeved on the connecting shaft between the movable buckle (64) and the buckle support (63); Under the action of the return spring (65), the movable buckle (64) cooperates with the wire harness (62) to remain closed.

7. A portable calibration device for a flow metering flume of a hydraulic structure according to claim 1, characterized in that, It also includes a control and display terminal (7) and signal cables (5); One end of the signal cable (5) is connected to the flow sensor (4), and the other end of the signal cable (5) is connected to the control and display terminal (7).

8. A portable calibration device for a flow metering flume of a hydraulic structure according to claim 1, characterized in that, A locking component is provided on the telescopic crossbar (2) to fix the position of the telescopic crossbar (2) after the length is adjusted.

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