Rotatable Venturi tube testing device

Abstract

The utility model provides a rotatable Venturi tube testing device, and belongs to the technical field of fluid experiment equipment. Comprising a mounting rack, a rotatable Venturi assembly, a multi-tube differential pressure gauge and a controller. The rotatable Venturi assembly comprises a Venturi tube, a rotating motor and a limiting clamp, the rotating motor is installed on one side of the installation frame and connected with the controller, and an output shaft of the rotating motor is arranged in the installation frame in a penetrating mode and connected with the Venturi tube through the tail end located on the other side of the installation frame; the contraction section and the throat section of the Venturi tube are connected with the two ends of the multi-tube differential pressure gauge correspondingly, the limiting clamp is arranged in the mounting frame and connected with the controller, and the limiting clamp is configured to be driven by the controller to limit and fix an output shaft of the rotating motor. The problem of low flow measurement precision caused by human factors and structural defects in the teaching process in the prior art can be solved.

Description

Technical Field

[0001] This utility model relates to the field of fluid experimental equipment technology, and in particular to a rotatable venturi tube testing device. Background Technology

[0002] Fluid mechanics developed gradually through humankind's struggle against nature and in production practices. It encompasses both the fundamental theories of natural science and applications in engineering and technological sciences.

[0003] In related technologies, fluid velocity and flow rate are key parameters in fluid mechanics. In teaching fluid mechanics, traditional velocity and flow rate measurement devices typically employ Venturi meters. Venturi meters consist of a converging section, a throat, and a diverging section, utilizing the principle that fluid velocity increases and pressure decreases as it passes through the narrow section of the throat to measure flow rate. Understanding the structure of Pitot tubes and Venturi tubes, as well as Bernoulli's equation, is crucial for students.

[0004] Further teaching involves research on the impact of different tilt angles of the venturi tube on flow measurement values. However, the fixed connection pipe structure of conventional venturi flow meters makes it difficult for instructors to adjust the tilt angle. Even when connecting the two ends of the venturi tube to relevant pipelines via flexible hoses to achieve a certain degree of angle adjustment, inaccurate rotation angles can occur due to insufficient instructor experience, manual adjustment errors, and overall swaying of the venturi tube caused by water flow during experiments. This leads to reading deviations and reduced accuracy of subsequent flow measurement data. Utility Model Content

[0005] This utility model provides a rotatable venturi tube testing device, which can solve the problem of low flow measurement accuracy caused by human factors and structural defects during teaching in related technologies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A rotatable venturi tube testing apparatus includes: a mounting bracket, a rotatable venturi assembly, a multi-tube differential pressure gauge, and a controller.

[0008] The rotatable venturi assembly includes a venturi tube, a rotating motor, and a limiting clamp. The rotating motor is mounted on one side of the mounting frame and connected to the controller. The output shaft of the rotating motor passes through the mounting frame and is connected to the venturi tube via its end located on the other side of the mounting frame. The constriction section and throat section of the venturi tube are respectively connected to the two ends of the multi-tube differential pressure gauge. The limiting clamp is disposed inside the mounting frame and connected to the controller. The limiting clamp is configured to limit and fix the output shaft of the rotating motor under the drive of the controller.

[0009] Optionally, the limiting clamp includes an electric push rod, a transmission gear, a limiting slide groove, and a locking rod. The transmission gear is rotatably mounted in the mounting frame. The electric push rod is connected to the controller. The telescopic end of the electric push rod is provided with a first rack that meshes with the transmission gear. The limiting slide groove is arranged facing the output shaft. The locking rod is slidably mounted in the limiting slide groove and is provided with a second rack that meshes with the transmission gear along its length. The locking rod has a first working position that extends out of the limiting slide groove and abuts against the output shaft, and a second working position that retracts into the limiting slide groove and separates from the output shaft.

[0010] Optionally, the transmission gear, the limiting slide groove, and the snap-fit ​​rod are provided in two sets and are arranged symmetrically with respect to the electric push rod. The first rack is a bidirectional rack that meshes with both sides of the transmission gear.

[0011] Optionally, it also includes a water circulation assembly, which includes a water tank and a water pump disposed on one side of the mounting bracket. The inlet of the water pump is connected to the water tank, the outlet of the water pump is connected to the inlet of the constriction section of the Venturi tube via a hose, and the outlet of the diffuser section of the Venturi tube is connected to the water tank.

[0012] Optionally, the water circulation assembly further includes a water storage tank, which is installed on one side of the mounting bracket. The outlet of the water pump is connected to the inlet of the water storage tank, and the outlet of the water storage tank is connected to the inlet of the constriction section of the venturi tube.

[0013] Optionally, a water-stabilizing perforated plate is provided between the inlet and outlet of the water storage tank.

[0014] Optionally, an end valve is provided on one side of the mounting bracket, the outlet of the diffuser section of the venturi tube is connected to the inlet of the end valve via a hose, and the outlet of the end valve is connected to the water tank.

[0015] Optionally, a circular scale is provided between the venturi tube and one side of the mounting bracket, and the output shaft of the rotating motor passes through the center of the circular scale.

[0016] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0017] This rotatable venturi tube testing device, used as a teaching instrument, is mounted on a laboratory testing platform via a mounting frame. The mounting frame has a plate-like structure with a certain thickness and an internal cavity for mounting electrical control or transmission components. The venturi tube, the main fluid flow measurement instrument, and the multi-tube differential pressure gauge used for liquid level difference observation are both mounted on the side plate of the mounting frame. It is used for flow measurement in conjunction with other liquid circulation systems. For testing the angle change of the venturi tube, this design includes a rotary motor, electrically controlled by a controller, fixed on the other side plate of the mounting frame as the main power supply. The output shaft of this rotary motor is rotatably and vertically mounted on the mounting frame, and its end is connected to the venturi tube. During teaching experiments, control commands can be sent to the controller via a host computer or mobile terminal to control the rotation of the motor's output shaft, thereby driving the venturi tube to rotate at a specified angle. Furthermore, after completing the rotation control, the controller further controls the limit clamp to contact and tighten the output shaft section from inside the mounting bracket, thereby preventing the venturi tube from shaking or rotating due to water flow impact or changes in the center of gravity during subsequent water circulation tests. This solves the problem of low flow measurement accuracy caused by human factors and structural defects during teaching in related technologies. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of 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.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the rotatable venturi tube testing device provided in this embodiment of the utility model;

[0020] Figure 2 This is a front view structural schematic diagram of the rotatable venturi tube testing device provided in this embodiment of the utility model;

[0021] Figure 3 This is a sectional view of the rear structure of the rotatable venturi tube testing device provided in this embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the limiting clamp provided in this embodiment of the utility model;

[0023] Figure 5This is a block diagram of the internal control structure of the rotatable venturi tube testing device provided in this embodiment of the utility model.

[0024] In the diagram: 1-Mounting bracket; 2-Rotable venturi assembly; 3-Multi-tube differential pressure gauge; 4-Controller; 5-Water circulation assembly; 6-End valve; 7-Circular dial; 21-Venturi tube; 22-Rotating motor; 23-Limit clamp; 51-Water tank; 52-Water pump; 53-Water storage tank; 221-Output shaft; 231-Electric actuator; 232-Transmission gear; 233-Limit slide; 234-Snap-fit ​​rod; 531-Water stabilizing orifice plate; 2311-First rack; 2341-Second rack. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the rotatable venturi tube testing device provided in this embodiment of the utility model; Figure 2 This is a front view schematic diagram of the rotatable venturi tube testing device provided in this embodiment of the utility model. Figure 3 This is a sectional view of the rear structure of the rotatable venturi tube testing device provided in this embodiment of the utility model; Figure 4 This is a schematic diagram of the structure of the limiting clamp provided in this embodiment of the utility model; Figure 5 This is a block diagram of the internal control structure of the rotatable venturi tube testing device provided in this embodiment of the utility model. Figures 1 to 5 As shown, this utility model embodiment provides a rotatable venturi tube testing device, including a mounting bracket 1, a rotatable venturi assembly 2, a multi-tube differential pressure gauge 3, and a controller 4.

[0027] The rotatable venturi assembly 2 includes a venturi tube 21, a rotating motor 22, and a limiting clamp 23. The rotating motor 22 is mounted on one side of the mounting frame 1 and connected to the controller 4. The output shaft 221 of the rotating motor 22 passes through the mounting frame 1 and is connected to the venturi tube 21 through its end located on the other side of the mounting frame 1. The constriction section and the throat section of the venturi tube 21 are respectively connected to the two ends of the multi-tube differential pressure gauge 3. The limiting clamp 23 is disposed inside the mounting frame 1 and connected to the controller 4. The limiting clamp is configured to limit and fix the output shaft 221 of the rotating motor 22 under the drive of the controller 4.

[0028] In this embodiment of the invention, the rotatable venturi tube testing device is used as a teaching instrument and is mounted on a laboratory testing platform via a mounting frame 1. The mounting frame 1 has a plate-like structure with a certain thickness and an internal cavity for mounting electrical control or transmission components. The venturi tube 21, serving as the main fluid flow measurement instrument, and the multi-tube differential pressure gauge 3, used for observing liquid level differences, are both mounted on the side plate of the mounting frame 1. For flow measurement in conjunction with other liquid circulation systems, and to meet the requirements of venturi tube angle change testing, this solution includes a rotating motor 22, electrically controlled by a controller 4, fixedly mounted on the other side plate of the mounting frame 1 as the main power supply device. The output shaft 221 of the rotating motor 22 is rotatably and vertically mounted on the mounting frame 1, and its end is connected to the venturi tube 21. During teaching experiments, control commands can be sent to the controller 4 via a host computer or mobile terminal to control the rotation of the output shaft 221 of the rotating motor 22, thereby driving the venturi tube 21 to rotate at a specified angle. Furthermore, after completing the rotation control, the controller 4 further controls the limit clamp 23 to contact and tighten the output shaft 221 section from inside the mounting bracket 1, thereby preventing the venturi tube from shaking or rotating due to water flow impact or changes in the center of gravity during subsequent water circulation tests. This solves the problem of low flow measurement accuracy caused by human factors and structural defects during teaching in related technologies.

[0029] Optionally, the limiting clamp 23 includes an electric push rod 231, a transmission gear 232, a limiting slide groove 233, and a locking rod 234. The transmission gear 232 is rotatably mounted in the mounting frame 1. The electric push rod 231 is connected to the controller 4. The telescopic end of the electric push rod 231 is provided with a first rack 2311 that meshes with the transmission gear 232. The limiting slide groove 233 is arranged facing the output shaft 221. The locking rod 234 is slidably mounted in the limiting slide groove 233 and is provided with a second rack 2341 that meshes with the transmission gear 232 along its length. The locking rod 234 has a first working position that extends out of the limiting slide groove 233 and abuts against the output shaft 221, and a second working position that retracts into the limiting slide groove 233 and separates from the output shaft 221. Exemplarily, in this embodiment of the present invention, after receiving the control command from the controller 4, the telescopic end of the electric actuator 231 extends and retracts, using its first rack 2311 to drive the transmission gear 232 to rotate, and then, through the meshing relationship with the second rack 2341, drives the locking rod 234 to slide between the first working position and the second working position relative to the limiting slide groove 233. When it moves to the first working position, the electric actuator 231 stops extending and retracting, and its end can abut against and fix the output shaft 221, preventing the output shaft 221 from shaking or rotating, and ensuring the rotational accuracy of the venturi tube 21 and the stability during the test.

[0030] Furthermore, two sets of transmission gears 232, limiting grooves 233, and locking rods 234 are provided and arranged symmetrically relative to the electric actuator 231. The first rack 2311 is a bidirectional rack that meshes with both transmission gears 232. In this embodiment of the invention, by setting multiple retractable locking rods 234 to provide multi-point locking of the output shaft 221, the stability of its limiting and fixing is improved, further enhancing the rotational accuracy of the venturi tube 21 and the stability during the test.

[0031] Optionally, a water circulation component 5 is also included. The water circulation component 5 includes a water tank 51 and a water pump 52 disposed on one side of the mounting frame 1. The inlet of the water pump 52 is connected to the water tank 51, and the outlet of the water pump 52 is connected to the inlet of the converging section of the Venturi tube 21 via a hose. The outlet of the diffuser section of the Venturi tube 21 is connected to the water tank 51. Exemplarily, in this embodiment of the present invention, a water circulation component 5 for circulating liquid to achieve flow measurement via the Venturi tube 21 is integrated on one side of the mounting frame 1. In addition to the water tank 51 containing liquid and the water pump 52 for providing circulation power, a water storage tank 53 is also included. The water storage tank 53 is mounted on one side of the mounting frame 1, the outlet of the water pump 52 is connected to the inlet of the water storage tank 53, and the outlet of the water storage tank 53 is connected to the inlet of the converging section of the Venturi tube 21. A water stabilizing orifice plate 531 is disposed between the inlet and outlet of the water storage tank 53. An end valve 6 is provided on one side of the mounting bracket 1. The outlet of the diffuser section of the venturi tube 21 is connected to the inlet of the end valve 6 via a hose. The outlet of the end valve 6 is connected to the water tank 51.

[0032] The flow test was conducted using the rotatable Venturi tube testing device provided in this embodiment of the invention, with no water injected into the entire circulation system. First, the end valve 6 was closed, and water was pumped from the water tank 51 to the storage tank 53 using the water pump 52. During the water storage process, the liquid level was stabilized by the control array on the water stabilizing orifice plate 531, removing residual air bubbles from the incoming water and ensuring that the liquid injected into the Venturi tube 21 met the test requirements, thus avoiding any impact on the test results. Then, the end valve 6 was opened to start the liquid circulation within the device. The rotatable Venturi tube 21 was connected from both sides via an plexiglass tube and a long flexible tube, ensuring sufficient rotational freedom. After the liquid flowed stably through the Venturi tube 21, the liquid flow rate was calculated by observing the liquid level difference in the multi-tube differential pressure gauge 3. The liquid eventually flowed back to the water tank 51 to complete the circulation.

[0033] After completing and recording a measurement, the tilt angle of the venturi tube 21 is changed by the controller 4, and the above steps are repeated to conduct a comparative experiment, thereby drawing the teaching conclusion on whether the tilt of the venturi tube affects the flow measurement.

[0034] Optionally, a circular dial 7 is provided between the venturi tube 21 and one side of the mounting bracket 1, and the output shaft 221 of the rotating motor 22 passes through the center of the circular dial 7. Exemplarily, in this embodiment of the invention, by providing a circular dial 7 coaxially arranged with the output shaft 221, instructors can easily confirm the rotation angle of the venturi tube 21 after electric control, facilitating timely fine-tuning.

[0035] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] The above description is only an optional embodiment of the present utility model and is not intended to limit the present utility model. 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 rotatable venturi test device, characterized by, The utility model relates to a kind of water conservancy equipment, including: Mounting frame (1), rotatable venturi assembly (2), multi-tube differential pressure gauge (3) and controller (4), The rotatable venturi assembly (2) includes Venturi (21), rotating motor (22) and limit clamp (23), the rotating motor (22) is installed in one side of the mounting frame (1) and is connected with the controller (4), the output shaft (221) of the rotating motor (22) is arranged in the mounting frame (1), and is connected with the Venturi (21) by the end located in the other side of the mounting frame (1), the convergent section and throat section of the Venturi (21) are connected with the two ends of the multi-tube differential pressure gauge (3) respectively, the limit clamp is arranged in the mounting frame (1) and is connected with the controller (4), the limit clamp is configured to limit and fix the output shaft (221) of the rotating motor (22) under the drive of the controller (4).

2. A swirl-type Venturi test device according to claim 1, wherein The limit clamp (23) includes electric push rod (231), transmission gear (232), limit sliding slot (233) and clamping rod (234), the transmission gear (232) is rotatably installed in the mounting frame (1), the electric push rod (231) is connected with the controller (4), the telescopic end of the electric push rod (231) is provided with the first rack (2311) engaged with the transmission gear (232), the limit sliding slot (233) is arranged towards the output shaft (221), the clamping rod (234) is slidably installed in the limit sliding slot (233), and the second rack (2341) engaged with the transmission gear (232) is arranged along the length direction, the clamping rod (234) has the first working position that protrudes from the limit sliding slot (233) and abuts with the output shaft (221), and the second working position that is retracted into the limit sliding slot (233) and is separated from the output shaft (221).

3. A swirl-type Venturi test device according to claim 2, wherein The transmission gear (232), the limit sliding slot (233) and the clamping rod (234) are provided with two groups, and are symmetrically arranged relative to the electric push rod (231), and the first rack (2311) is a bidirectional rack engaged with the transmission gear (232) on both sides.

4. A swirl tube test device according to any one of claims 1 to 3, wherein It also includes water circulation assembly (5), the water circulation assembly (5) includes sink (51) and water pump (52) arranged in one side of the mounting frame (1), the inlet of the water pump (52) is connected with the sink (51), the outlet of the water pump (52) is connected with the convergent section inlet of the Venturi (21) through hose, and the outlet of the diffusion section of the Venturi (21) is connected with the sink (51).

5. A swirl-type Venturi test device according to claim 4, wherein The water circulation assembly (5) further includes water storage tank (53), the water storage tank (53) is installed in one side of the mounting frame (1), the outlet of the water pump (52) is connected with the inlet of the water storage tank (53), and the outlet of the water storage tank (53) is connected with the convergent section inlet of the Venturi (21).

6. A swirl-type Venturi test device according to claim 5, wherein Stable water orifice plate (531) is arranged between the inlet and outlet of the water storage tank (53).

7. The rotatable Venturi test device of claim 4, wherein, One side of the mounting frame (1) is provided with a terminal valve (6), an outlet of a diffusion section of the Venturi tube (21) is connected with an inlet of the terminal valve (6) through a hose, and an outlet of the terminal valve (6) is connected with the water tank (51).

8. The rotatable Venturi test device of any one of claims 1 to 3, wherein, A circular scale dial (7) is arranged between the Venturi tube (21) and one side of the mounting frame (1), and an output shaft (221) of the rotating motor (22) is arranged at the center of the circular scale dial (7).

Images