A simulated experimental circulating water tank

Abstract

The present invention provides a simulated experimental circulating water tank, including a test section, a drainage pipeline and a water pump, which is characterized in that: the water inlet end of the test section is connected to the water outlet end of a rectifying and contracting pipeline, the water outlet end of the test section is connected to the water inlet end of an expanding pipeline, there are at least two drainage pipelines, and each drainage pipeline is symmetrically arranged around the test section, and a water pump is arranged on each drainage pipeline. The water outlet end of the drainage pipeline is connected to the water inlet end of the rectifying and contracting pipeline, and the water inlet end of the drainage pipeline is connected to the water outlet end of the expanding pipeline. The symmetrically arranged drainage pipelines significantly reduce the unevenness of the flow velocity of the water flow section, and can achieve accurate adjustment of the water flow velocity in the test section. The drainage pipelines symmetrically arranged on both sides of the test section form a circulation system with the test section, and the motor of the water pump is connected to the adjustable pitch propeller in the drainage pipeline. By adjusting the propeller speed and pitch, the water flow velocity and reciprocating motion can be adjusted, and flow, wave and wave-current coupling tests can be carried out.

Description

Technical Field

[0001] The invention belongs to the technical field of experimental devices, and relates to a circulating water tank used in basic theoretical research and application practice in laboratories on fluid mechanics, navigation models, ocean current simulations, etc., and is specifically a simulated experimental circulating water tank. Background Art

[0002] Circulating water tank is an important test equipment in the study of hydrodynamics. There are two main types: circulating and gravity. The test is carried out by fixing the test model, adjusting the water flow rate and environmental pressure. It is mainly used for the study of hydrodynamics problems such as water cavitation, water elasticity, free surface, ship movement, underwater propulsion, hydraulic machinery, etc. It is also widely used in the field of basic research on aerodynamics. The current circulating water tank is limited by the power of the water pump, and the flow rate is generally not high. With the development of science and technology, ships, submarines, etc. are developing in the direction of high speed. The circulating water tank has the problems of small scale and low flow rate, and it is difficult to simulate the real working conditions under the high-speed operation environment. In addition, the water flow section of the current water tank is uneven, and the water flow is unstable, which will have a great impact on the test results. Summary of the invention

[0003] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a simulated experimental circulating water tank, which increases the number of water pumps by adding water flow pipelines. The water flow circulation pipelines are completely symmetrically distributed, which can not only increase the flow rate of the circulating water tank, but also effectively solve the problem of inconsistent water flow velocities between the inner and outer diameters of large-scale circulating water tanks, making the water flow in the entire circulation process more stable and easier to achieve precise regulation of the water flow in the test section.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A simulated experimental circulating water tank includes a test section, a drainage pipeline and a water pump, characterized in that the water inlet end of the test section is connected to the water outlet end of a rectifying and contracting pipeline, the water outlet end of the test section is connected to the water inlet end of an expanding pipeline, there are at least two drainage pipelines, and each of the drainage pipelines is symmetrically arranged around the test section, each drainage pipeline is provided with a water pump, the water outlet end of the drainage pipeline is connected to the water inlet end of the rectifying and contracting pipeline, and the water inlet end of the drainage pipeline is connected to the water outlet end of the expanding pipeline.

[0006] Improvements to the above technical solution: the drainage pipeline is divided into a single layer, a double layer or a multi-layer, and each layer has at least two symmetrically arranged drainage pipelines; the water pump includes a motor and an adjustable pitch propeller, and the adjustable pitch propeller is placed in the drainage pipeline.

[0007] Further improvement of the above technical solution: the test section and the drainage pipeline are arranged horizontally, the drainage pipeline includes a middle straight pipe section and C-shaped curved pipe sections at both ends, the vertical projection of the simulated experimental circulating water tank is in the shape of an "8", and the test section is located in the middle position.

[0008] Further improvement of the above technical solution: the rectifying and contracting pipeline includes a convergence section, a rectifying section and a contraction section, the two ends of the rectifying section are respectively connected to the convergence section and the contraction section, a water inlet is arranged at the water inlet end of the convergence section, the number of water inlets on the convergence section is the same as the number of the drainage pipelines, and each water inlet on the convergence section is connected to one end of the drainage pipeline; the expansion pipeline includes a diffusion section and a dispersion section, the small-diameter end of the diffusion section is connected to the water outlet end of the test section, the large-diameter end of the diffusion section is connected to the water inlet end of the dispersion section, a water outlet is arranged at the water outlet end of the dispersion section, the number of the water outlets of the dispersion section is the same as the number of the drainage pipelines, and each water outlet is connected to the other end of the drainage pipeline.

[0009] Further improvement of the above technical solution: the two ends of the straight pipe section in the middle of the drainage pipeline are connected to the C-shaped bend section through flanges, the contraction section in the rectifying contraction pipeline is connected to the C-shaped bend section through flanges, the expansion pipeline is connected to the C-shaped bend section through flanges, the test section is connected to the contraction section by flanges, and a rubber sealing gasket is added.

[0010] Further improvement to the above technical solution: an arc-shaped guide plate is provided in the C-shaped curved pipe section, and the curvature of the arc-shaped guide plate is substantially consistent with that of the C-shaped curved pipe section.

[0011] Further improvement to the above technical solution: the test section is made of tempered glass, and the drainage pipeline, rectification and contraction pipeline and expansion pipeline are all made of stainless steel pipes.

[0012] The advantages and positive effects of the present invention compared with the prior art are:

[0013] 1. The test section of the simulated experimental circulating water tank of the present invention is located in the middle position. The drainage pipeline can be divided into a single-layer, double-layer or multi-layer symmetrical arrangement or multiple pairs of drainage pipelines can be symmetrically arranged around the test section according to the test water flow rate and water flow velocity requirements, and a water pump is arranged on each drainage pipeline. By increasing the number of water pumps by adding water flow pipelines, the water flow rate and water flow rate are significantly improved compared to a single-pipeline circulating water tank. The cross-section of a pipeline is smaller and all pipelines are evenly and symmetrically arranged around the test section, which can effectively solve the problem of inconsistent water flow velocities between the inner and outer diameters of large-scale circulating water tanks, making the water flow more stable during the entire circulation process;

[0014] 2. The two sides of the test section of the water tank of the present invention are completely symmetrical. By adjusting the pitch of the adjustable pitch water pump propeller, the water flow can achieve reciprocating motion. Compared with other water tanks, the present invention can achieve unidirectional and reciprocating flow of water flow. Compared with ordinary circulating water tanks, wave tests and wave-current coupling tests can be carried out;

[0015] 3. Its structural design is reasonable and easy to operate. It can accurately adjust the water flow in the test section and better meet the needs of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view of a simulated experimental circulating water tank of the present invention;

[0017] Figure 2 This is a front view of a simulated experimental circulating water tank of the present invention;

[0018] Figure 3 It is a cross-sectional schematic diagram of a converging section of a double-layer double-tube arrangement of drainage pipelines in a simulated experimental circulating water tank of the present invention;

[0019] Figure 4 It is a cross-sectional schematic diagram of a converging section of a four-layer double-tube arrangement of drainage pipelines in a simulated experimental circulating water tank of the present invention.

[0020] In the figure: 1-flange, 2-C-shaped bend section, 3-arc guide plate, 4-convergence section, 5-rectification section, 5.1-honeycomb rectifying plate, 6-contraction section, 7-straight pipe section, 8-test section, 9-diffusion section, 10-dispersion section, 11-adjustable pitch propeller, 12-motor. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0022] See also Figure 1 , Figure 2 The embodiment of a simulated experimental circulating water tank of the present invention comprises a test section 8, a drainage pipeline and a water pump, wherein the water inlet end of the test section 8 is connected to the water outlet end of a rectifying and contracting pipeline, and the water outlet end of the test section 8 is connected to the water inlet end of an expanding pipeline. There are at least two drainage pipelines, and each of the drainage pipelines is symmetrically arranged around the test section. Each drainage pipeline is provided with a water pump, the water outlet end of the drainage pipeline is connected to the water inlet end of the rectifying and contracting pipeline, and the water inlet end of the drainage pipeline is connected to the water outlet end of the expanding pipeline.

[0023] Furthermore, the drainage pipeline can be divided into a single layer, a double layer or a multi-layer symmetrical arrangement around the test section, and each layer has at least two symmetrically arranged drainage pipelines. The water pump includes a motor 12 and an adjustable pitch propeller 11, and the adjustable pitch propeller 11 is placed in the drainage pipeline.

[0024] Furthermore, the test section 8 and the drainage pipeline are arranged horizontally, the drainage pipeline includes a middle straight pipe section 7 and C-shaped curved pipe sections 2 at both ends, the vertical projection of the simulated experimental circulating water tank is in the shape of "8", and the test section 8 is located in the middle.

[0025] Specifically: the above-mentioned rectifying and contracting pipeline includes a converging section 4, a rectifying section 5 and a contracting section 6, and a honeycomb rectifying plate 5.1 is arranged in the rectifying section 5. The two ends of the rectifying section 5 are respectively connected to the converging section 4 and the contracting section 6. A water inlet is arranged at the water inlet end of the converging section 4. The number of water inlets on the converging section 4 is the same as the number of the drainage pipelines. Each water inlet on the converging section 4 is connected to one end of the drainage pipeline. The expansion pipeline includes a diffusion section 9 and a dispersion section 10. The small-diameter end of the diffusion section 9 is connected to the water outlet end of the test section 8. The large-diameter end of the diffusion section 9 is connected to the water inlet end of the dispersion section 10. A water outlet is arranged at the water outlet end of the dispersion section 10. The number of water outlets on the dispersion section 10 is the same as the number of the drainage pipelines. Each of the water outlets is connected to the other end of the drainage pipeline.

[0026] In specific implementation, the drainage pipeline in the simulated experimental circulating water tank of the present invention can be divided into two layers, each layer having two symmetrically arranged drainage pipelines. Figure 3 The drainage pipeline shown is a cross-sectional view of the converging section 4 of a double-layer double-tube arrangement. Figure 2 It is a side view of a double-layer double tube, in which the double-layer double tube is arranged as a circular tube that converges into a square tube at the converging section 4 .

[0027] The drainage pipeline in the simulated experimental circulating water tank of the present invention can also be divided into four upper and lower layers, and each layer has two symmetrically arranged drainage pipelines. Figure 4 The drainage pipeline shown is a cross-sectional view of a converging section 4 of a four-layer double-tube arrangement. The four-layer double-tube arrangement is four layers. In the converging section 4, each drainage pipeline is changed from a circular tube to a triangular tube, and eight triangular tubes are combined into a rectifying section.

[0028] Furthermore, both ends of the straight pipe section 7 in the middle of the above-mentioned drainage pipeline are connected to the C-shaped bend section 2 through flanges 1, the contraction section 6 in the rectification contraction pipeline is connected to the C-shaped bend section 2 through flange 1, the expansion pipeline is connected to the C-shaped bend section 2 through flange 1, and the test section 8 is connected to the contraction section 6 by flange 1, and a rubber sealing gasket is added.

[0029] In another step, an arc-shaped guide plate 3 is arranged in the C-shaped curved pipe section 2 , and the curvature of the arc-shaped guide plate 3 is substantially consistent with that of the C-shaped curved pipe section 2 .

[0030] Preferably, the test section 8 is made of tempered glass, and the DC section 7, the rectifying section 5, the contraction section 6 and the diffusion section 9 are all made of stainless steel tubes.

[0031] like Figure 1 As shown, when the present invention is working: the motor 12 in the water pump in each pipeline drives the adjustable pitch propeller 11 respectively, and the water circulates in the pipeline, which can greatly improve the water flow rate and water flow rate of the circulating water tank, and can achieve precise regulation of the water flow in the test section 8, and can better meet the needs of the test.

[0032] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also belong to the protection scope of the present invention.

Claims

1. A simulated experimental circulating water tank, comprising a test section, a drainage pipeline and a water pump, characterized in that: The water inlet end of the test section is connected to the water outlet end of a rectifying and contracting pipeline, and the water outlet end of the test section is connected to the water inlet end of an expanding pipeline. There are at least two drainage pipelines, and each of the drainage pipelines is symmetrically arranged around the test section. A water pump is arranged on each drainage pipeline. The water outlet end of the drainage pipeline is connected to the water inlet end of the rectifying and contracting pipeline, and the water inlet end of the drainage pipeline is connected to the water outlet end of the expanding pipeline. The test section and the drainage pipeline are arranged horizontally, and the drainage pipeline includes a middle straight pipe section and C-shaped bend sections at both ends. The vertical projection of the simulated experimental circulating water tank is in the shape of "8", and the test section is located in the middle position; the rectifying and contracting pipeline includes a converging section, a rectifying section and a contracting section. The two ends of the rectifying section are respectively connected to the converging section and the contracting section. The water inlet end of the converging section is provided with a water inlet, and the number of water inlets on the converging section is the same as the number of drainage pipelines. The amount is the same, and the water inlet on each of the converging sections is connected to one end of the drainage pipeline; the expansion pipeline includes a diffusion section and a dispersion section, the small-diameter end of the diffusion section is connected to the water outlet end of the test section, and the large-diameter end of the diffusion section is connected to the water inlet end of the dispersion section, and the water outlet end of the dispersion section is provided with a water outlet, and the number of the water outlets of the dispersion section is the same as the number of the drainage pipelines, and each of the water outlets is connected to the other end of one of the drainage pipelines; the two ends of the straight pipe section in the middle of the drainage pipeline are connected to the C-shaped bend section through flanges, the contraction section in the rectifying contraction pipeline is connected to the C-shaped bend section through flanges, the expansion pipeline is connected to the C-shaped bend section through flanges, and the test section is connected to the contraction section by flanges, and a rubber sealing gasket is added; an arc-shaped guide plate is provided in the C-shaped bend section, and the curvature of the arc-shaped guide plate is basically consistent with that of the C-shaped bend section.

2. A simulated experimental circulating water tank according to claim 1, characterized in that: The drainage pipeline is divided into a single layer, a double layer or a multi-layer, and each layer has at least two symmetrically arranged drainage pipelines; the water pump includes a motor and an adjustable pitch propeller, and the adjustable pitch propeller is placed in the drainage pipeline.

3. A simulated experimental circulating water tank according to claim 1 or 2, characterized in that: The test section is made of tempered glass, and the drainage pipeline, rectification and contraction pipeline and expansion pipeline are all made of stainless steel pipes.

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