Regulating structure of propeller current meter

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By using an adjustable tail fin and floating structure, the problem of velocity measurement accuracy of propeller-type current meters under different flow velocities and stability conditions has been solved, achieving higher velocity measurement accuracy and stability, and making it suitable for various water flow environments.

CN224500658UActive Publication Date: 2026-07-14QINGDAO GUOMAO ENVIRONMENTAL TESTING CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: QINGDAO GUOMAO ENVIRONMENTAL TESTING CO LTD
Filing Date: 2025-10-09
Publication Date: 2026-07-14

AI Technical Summary

Technical Problem

The existing propeller-type current meter has a fixed tail fin structure, which affects the speed measurement effect and accuracy in slow or fast water flow, and it is prone to swaying in unstable water flow.

Method used

An adjustable tail fin structure was designed. By combining a fixed tail fin and an adjustable tail fin, the area and position of the tail fin can be adjusted according to the water flow velocity and stability to increase or decrease the contact area with the water. The distance between the main body of the velocity meter and the water surface can be adjusted by an adjustable float to adapt to the flow velocity measurement at different depths.

Benefits of technology

It improves the accuracy of velocity measurement under different flow velocities and stability conditions, reduces the swaying of the velocity meter in unstable water flow, and is more adaptable to various water flow environments.

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Abstract

The utility model provides a kind of adjusting structure of propeller type current meter, it is related to hydrological detection technical field, including: speedometer main part, the right of speedometer main part is fixedly connected with direction-adjusting rotary cylinder, speedometer support shaft is rotatably connected to the direction-adjusting rotary cylinder, the right of direction-adjusting rotary cylinder is fixedly connected with fixed tail wing, the relative position of adjustable tail wing and fixed tail wing is adjusted, adjustable tail wing is pulled to right, increase tail wing overall area, increase the contact area with water, to more accurate perception water flow direction, more easily adjust the orientation of speedometer main part according to the change of water flow direction, for the water flow of relatively slow flow rate, if tail wing is too small, then lead to speedometer not easy to be subjected to water flow direction change and change direction simultaneously, to affect speed measurement effect, and for the water flow of fast flow rate, tail wing is extremely easy to change speedometer direction according to the change of water flow direction, plus the instability of water flow, it is extremely easy to cause speedometer swing, also can affect the problem of test precision.

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Description

Technical Field

[0001] This utility model relates to the field of hydrological detection technology, and in particular to an adjustment structure for a propeller-type current meter. Background Technology

[0002] A propeller current meter is a contact-type water flow velocity measuring instrument. It calculates the flow velocity by measuring the rotational speed of the propeller driven by the water flow. It is the most commonly used classic velocity measuring device in hydrological surveys, hydraulic engineering, and laboratory flume experiments. When using a propeller current meter, the instrument is mounted on a measuring rod or suspension cable, ensuring that its attitude is vertical and the propeller is facing the direction of water flow. The propeller part is placed at a specified depth in the water area to be measured. The number of pulse signals emitted by the instrument is recorded within a predetermined time, or the calculated flow velocity value can be directly read from a digital display instrument.

[0003] In existing propeller-type current meters, the tail fin structure is fixed during use. The tail fin can freely move the instrument head to align with the water flow direction. For slow-moving water flows, if the tail fin is too small, the speed meter will not be able to synchronously change direction with changes in the water flow direction, thus affecting the speed measurement results. For fast-moving water flows, the tail fin can easily change the direction of the speed meter according to changes in the water flow direction. In addition, the instability of the water flow can easily cause the speed meter to sway, which will also affect the test accuracy. Utility Model Content

[0004] This invention provides an adjustment structure for a propeller-type current meter to address the problem that existing propeller-type current meters have a fixed tail fin structure. The tail fin can freely move the instrument head to align with the water flow direction. For slower-moving water, if the tail fin is too small, the current meter is not easily affected by changes in the water flow direction, thus affecting the speed measurement effect. For faster-moving water, the tail fin easily changes the direction of the current meter according to changes in the water flow direction. In addition, the instability of the water flow can easily cause the current meter to sway, which also affects the test accuracy.

[0005] This utility model provides an adjustment structure for a propeller-type current meter, specifically including: a speed meter body, a directional rotary cylinder fixedly connected to the right side of the speed meter body, the directional rotary cylinder being rotatably connected to the speed meter support shaft, a fixed tail fin fixedly connected to the right side of the directional rotary cylinder, the fixed tail fin having a strip-shaped tail fin groove, two tail fin locking plates fixedly connected to the rear surface of the fixed tail fin, the two tail fin locking plates being located above and below the tail fin groove respectively, an adjustable tail fin movably connected to the rear of the fixed tail fin, a guide slider fixedly connected to the left edge of the rear surface of the adjustable tail fin, the guide slider having a slider guide opening extending longitudinally, an adjustment groove being opened on the rear surface of the guide slider, two telescopic locking plates slidably connected inside the slider guide opening, a locking plate top spring fixedly connected between the two telescopic locking plates, a float screw fixedly connected to the upper end of the speed meter support shaft, a telescopic tube fixedly connected to the upper end of the float screw, and the telescopic tube being slidably connected to an upper connecting rod.

[0006] Furthermore, an upper limit plate is fixedly connected to the upper end of the floating disc screw, and a lower limit plate is fixedly connected to the lower end of the floating disc screw.

[0007] Furthermore, the floating screw is provided with a hollow adjustable floating disk, and the center of the adjustable floating disk is fixedly connected to a floating disk adjusting sleeve, which is screwed to the floating screw.

[0008] Furthermore, a telescopic groove is provided on the wall of the telescopic tube, and a connecting rod limiting block is fixedly connected to the lower edge of the side of the upper connecting rod, and the connecting rod limiting block is slidably connected inside the telescopic groove.

[0009] Furthermore, the outer edge of the telescopic locking plate is provided with a toothed structure, and the side of the tail wing locking plate facing the center of the tail wing groove is provided with a toothed structure, and the outer edge of the telescopic locking plate is closely fitted to the tail wing locking plate.

[0010] Furthermore, the inner edge of the telescopic lock plate is bent to form a lock plate handle, which is slidably connected inside the adjustment groove.

[0011] Furthermore, the telescopic locking plate is tightly fitted to the rear surface of the fixed tail wing, and the fixed tail wing and the adjustable tail wing are tightly fitted together.

[0012] This utility model provides an adjustment structure for a propeller-type current meter, which has the following beneficial effects:

[0013] The propeller-type current meter of this invention is equipped with a variable-shape tail fin structure, which is formed by combining a fixed tail fin and an adjustable tail fin. In areas where the water flow velocity is relatively slow, the relative position of the adjustable tail fin and the fixed tail fin can be adjusted. By pulling the adjustable tail fin to the right, the overall area of the tail fin is increased, and the contact area with the water is increased, thereby more accurately sensing the water flow direction and making it easier to adjust the orientation of the main body of the current meter according to the change in the water flow direction.

[0014] In addition, for water flows with rapid velocity and frequent changes in direction, the adjustable tail fin can be moved to the left, so that the adjustable tail fin and the fixed tail fin tend to overlap, thereby reducing the overall area of the tail fin and the contact area with the water. This reduces the sensitivity of the tail fin to changes in the direction of unstable water flow and reduces the swaying amplitude of the speedometer body in unstable water flow.

[0015] In addition, an adjustable float with variable height is provided. Compared with the existing float-type height control velocimeter, the distance between the adjustable float and the main body of the velocimeter is adjustable, thereby adjusting the distance between the main body of the velocimeter and the water surface, which is suitable for measuring the flow velocity of water at different depths. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0017] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0018] In the attached diagram:

[0019] Figure 1 A schematic diagram of the overall structure of this application is shown;

[0020] Figure 2 A schematic diagram of the telescopic chute of this application is shown;

[0021] Figure 3 A schematic diagram of the fixed tail fin structure of this application is shown;

[0022] Figure 4 This diagram shows the structure of the fixed tail fin and adjustable tail fin when they are separated.

[0023] Figure 5 A schematic diagram of the adjustable tail fin of this application is shown;

[0024] Figure 6 This application shows Figure 3 A magnified structural diagram of point A in the middle.

[0025] Figure label:

[0026] 1. Speedometer body; 101. Directional swivel cylinder; 2. Fixed tail fin; 201. Tail fin slide groove; 202. Tail fin locking plate; 3. Adjustable tail fin; 301. Guide slider; 302. Slider guide port; 303. Adjustment groove; 304. Telescopic locking plate; 305. Locking plate handle; 306. Locking plate top spring; 4. Speedometer support shaft; 5. Float screw; 501. Upper limit plate; 502. Lower limit plate; 503. Telescopic tube; 504. Telescopic slide groove; 6. Adjustable float; 601. Float adjusting screw sleeve; 7. Upper connecting rod; 701. Connecting rod limit block. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] Example 1: Please refer to Figures 1 to 6 :

[0029] This utility model proposes an adjustment structure for a propeller-type current meter, comprising: a speed meter body 1, a directional rotary cylinder 101 fixedly connected to the right side of the speed meter body 1, the directional rotary cylinder 101 being rotatably connected to the speed meter support shaft 4, a fixed tail fin 2 fixedly connected to the right side of the directional rotary cylinder 101, the fixed tail fin 2 having a strip-shaped tail fin groove 201, two tail fin locking plates 202 fixedly connected to the rear surface of the fixed tail fin 2, the two tail fin locking plates 202 being located above and below the tail fin groove 201 respectively, an adjustable tail fin 3 movably connected to the rear of the fixed tail fin 2, a guide slider 301 fixedly connected to the left edge of the rear surface of the adjustable tail fin 3, the guide slider 301 having a longitudinal through-hole. The device includes a slider guide 302, a guide slider 301 with an adjustment groove 303 on its rear surface, two telescopic locking plates 304 slidably connected inside the slider guide 302, and a locking plate top spring 306 fixedly connected between the two telescopic locking plates 304. A float screw 5 is fixedly connected to the upper end of the speed measuring instrument support shaft 4, and a telescopic tube 503 is fixedly connected to the upper end of the float screw 5. The telescopic tube 503 is slidably connected to the upper connecting rod 7. A fixed tail fin 2 and an adjustable tail fin 3 are combined. For areas with slow-moving water, the relative position of the adjustable tail fin 3 and the fixed tail fin 2 can be adjusted. Pulling the adjustable tail fin 3 to the right increases the overall area of the tail fin and the contact area with the water, thus enabling more accurate sensing. The direction of the water flow makes it easier to adjust the orientation of the speed measuring instrument body 1 according to changes in the water flow direction. The outer edge of the telescopic locking plate 304 has a toothed structure, and the side of the tail fin locking plate 202 facing the center of the tail fin groove 201 has a toothed structure. The outer edge of the telescopic locking plate 304 is tightly fitted to the tail fin locking plate 202, and the inner edge of the telescopic locking plate 304 is bent to form a locking plate handle 305. The locking plate handle 305 is slidably connected inside the adjustment groove 303. The telescopic locking plate 304 is tightly fitted to the rear surface of the fixed tail fin 2, and the fixed tail fin 2 and the adjustable tail fin 3 are tightly fitted. For water flows with rapid speed and frequent changes in direction, the adjustable tail fin 3 can be moved to the left. The fixed tail fin 2 is nearly overlapped with the fixed tail fin 2, thereby reducing the overall area of the tail fin and the contact area with water, avoiding the tail fin's sensitivity to changes in the direction of unstable water flow, and reducing the swaying amplitude of the speed measuring instrument body 1 in unstable water flow; when adjusting the adjustable tail fin 3, push the two locking plate handles 305 towards the middle to compress the locking plate top spring 306, so that the telescopic locking plate 304 is separated from the tail fin locking plate 202, and the adjustable tail fin 3 can be slid left and right. After the adjustment is completed, the elasticity of the locking plate top spring 306 pushes the telescopic locking plate 304 outward, so that the toothed structure of the telescopic locking plate 304 is tightly engaged with the inner teeth of the tail fin locking plate 202, thereby locking the fixed tail fin 2 and the adjustable tail fin 3.

[0030] In this embodiment, an upper limit plate 501 is fixedly connected to the upper end of the floating disk screw 5, and a lower limit plate 502 is fixedly connected to the lower end of the floating disk screw 5; the range of motion of the adjustable floating disk 6 is limited by the setting of the upper limit plate 501 and the lower limit plate 502.

[0031] In Example 2, based on Example 1, a hollow adjustable float 6 is provided outside the float screw 5. A float adjusting sleeve 601 is fixedly connected to the center of the adjustable float 6. The float adjusting sleeve 601 is spirally connected to the float screw 5. By rotating the adjustable float 6, the float adjusting sleeve 601 and the float screw 5 form a spiral drive, controlling the distance between the adjustable float 6 and the velocimeter body 1. A telescopic groove 504 is provided on the wall of the telescopic tube 503. A connecting rod limiting block 701 is fixedly connected to the lower edge of the side of the upper connecting rod 7. The connecting rod limiting block 701 is slidably connected inside the telescopic groove 504, playing a guiding and limiting role. The distance between the adjustable float 6 and the velocimeter body 1 is adjustable, thereby adjusting the distance between the velocimeter body 1 and the water surface, which is suitable for measuring the flow velocity of water at different depths.

[0032] The working principle of this embodiment is as follows: First, the upper connecting rod 7 is vertically fixed and held or fixedly connected to the bridge or bank through a bracket, so that the main body of the speed measuring instrument 1 is vertically submerged in the water for a certain distance. The buoyancy of the adjustable float 6 controls the distance between the main body of the speed measuring instrument 1 and the water surface. When used in a slow-flowing environment, the two locking plate handles 305 are squeezed to push the adjustable tail fin 3 to the right, increasing the overall area of the tail fin and the contact area with the water, thereby more accurately sensing the direction of the water flow and more easily adjusting the orientation of the main body of the speed measuring instrument 1 according to the change of the water flow direction. When used in a fast-flowing environment, the two locking plate handles 305 are squeezed to move the adjustable tail fin 3 to the left, so that the adjustable tail fin 3 and the fixed tail fin 2 tend to overlap, thereby reducing the overall area of the tail fin and the contact area with the water, avoiding the tail fin's sensitivity to changes in the direction of unstable water flow, and reducing the swaying amplitude of the main body of the speed measuring instrument 1 in unstable water flow.

[0033] The following points should be noted in this article:

[0034] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in a general design.

[0035] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0036] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An adjustment structure for a propeller-type current meter, comprising: The speed measuring instrument body (1) is characterized in that a directional adjustment cylinder (101) is fixedly connected to the right side of the speed measuring instrument body (1), the directional adjustment cylinder (101) is rotatably connected to the speed measuring instrument support shaft (4), a fixed tail fin (2) is fixedly connected to the right side of the directional adjustment cylinder (101), the fixed tail fin (2) has a strip-shaped tail fin groove (201), two tail fin locking plates (202) are fixedly connected to the rear surface of the fixed tail fin (2), the two tail fin locking plates (202) are respectively located above and below the tail fin groove (201), and an adjustable tail fin (3) is movably connected to the rear of the fixed tail fin (2). The left edge of the rear surface of the adjustable tail fin (3) is fixedly connected to a guide slider (301). The guide slider (301) has a slider guide opening (302) that runs through it longitudinally. The rear surface of the guide slider (301) has an adjustment groove (303). Two telescopic locking plates (304) are slidably connected inside the slider guide opening (302). A locking plate top spring (306) is fixedly connected between the two telescopic locking plates (304). The upper end of the speed measuring instrument support shaft (4) is fixedly connected to a floating plate screw (5). The upper end of the floating plate screw (5) is fixedly connected to a telescopic tube (503). The telescopic tube (503) is slidably connected to the upper connecting rod (7).

2. The adjustment structure of the propeller-type current meter according to claim 1, characterized in that, The upper end of the floating screw (5) is fixedly connected to an upper limit plate (501), and the lower end of the floating screw (5) is fixedly connected to a lower limit plate (502).

3. The adjustment structure of the propeller-type current meter according to claim 1, characterized in that, The floating screw (5) is provided with a hollow adjustable floating disk (6), and the center of the adjustable floating disk (6) is fixedly connected to the floating disk adjusting sleeve (601), which is spirally connected to the floating screw (5).

4. The adjustment structure of the propeller-type current meter according to claim 1, characterized in that, The telescopic tube (503) has a telescopic groove (504) on its wall. The lower side edge of the upper connecting rod (7) is fixedly connected to a connecting rod limiting block (701), which is slidably connected inside the telescopic groove (504).

5. The adjustment structure of a propeller-type current meter according to claim 1, characterized in that, The telescopic locking plate (304) has a toothed structure on its outer edge, and the tail wing locking plate (202) has a toothed structure on the side facing the center of the tail wing groove (201). The outer edge of the telescopic locking plate (304) is tightly attached to the tail wing locking plate (202).

6. The adjustment structure of a propeller-type current meter according to claim 5, characterized in that, The inner edge of the telescopic locking plate (304) is bent to form a locking plate handle (305), which is slidably connected inside the adjustment groove (303).

7. The adjustment structure of a propeller-type current meter according to claim 6, characterized in that, The telescopic locking plate (304) fits tightly against the rear surface of the fixed tail wing (2), and the fixed tail wing (2) fits tightly against the adjustable tail wing (3).