Dock drainage pump basin rectification and surge test device and test method

Abstract

The application discloses a dock drainage pump pool rectification and deswirl test device and a test method, belongs to the field of dock drainage design, and aims to simulate the influence of various factors on the flow field flow state and provide effective guidance for the rectification and deswirl measures of the dock drainage system. The device comprises an entrance part one, an entrance part two and an entrance part three simulating a dock drainage corridor; a test part simulating a pump pool; and a connecting part simulating the connecting area of the dock drainage corridor and the pump pool. The connecting part comprises a connecting port one, a connecting port two, a connecting port three and a connecting port four. The entrance part one is detachably connected with the connecting port one; the entrance part two is detachably connected with the connecting port two; the entrance part three is detachably connected with the connecting port three; and the test part is detachably connected with the connecting port four. A rectification device placement area is arranged at the connecting port four. A drainage pump suction inlet is arranged at the test part. A deswirl device placement area is arranged at one end of the test part away from the connecting part and close to the drainage pump suction inlet. The test is comprehensive, the device is simple, and the device is beneficial to guiding the actual design.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of dock drainage design, in particular to a dock drainage pump pool rectification and swirl elimination test device and test method. BACKGROUND

[0002] With the development of global economic trade, the continuous progress of shipbuilding technology and the emergence of transportation trunk lines and hub ports around the world, in recent years, the development process of large-scale ship has gradually accelerated, the main ship type is continuously upgraded, and the proportion of large-scale ships in the fleet is continuously rising. The large-scale of ships also puts forward new requirements for the large-scale of docks. Large-scale docks with a deadweight tonnage greater than 50,000 tons usually have the characteristics of large tidal range, large drainage volume, high drainage intensity, high water flow speed, large dock chamber water surface fluctuation and strong impact. Improper design of the dock drainage system not only may affect the operation efficiency, but also may affect the safety of the dock project. Therefore, the design of the dock drainage system will try to reduce the occurrence of drainage flow passage vortex and swirl through reasonable rectification and swirl elimination measures, so as to ensure to provide good water inlet conditions for the drainage pump, improve the energy performance and cavitation performance of the water pump device, improve the water surface stability, and ensure the safe operation of the drainage.

[0003] However, when designing the dock drainage system, how to select reasonable rectification and swirl elimination measures needs to be determined through test. If the rectification and swirl elimination measures are directly tested in the actual project, the test is complex and the cost is extremely high, so a special test device is needed for testing. SUMMARY

[0004] The purpose of the present application is to provide a dock drainage pump pool rectification and swirl elimination test device, which can simulate the influence of various factors on the flow field flow state and provide effective guidance for the rectification and swirl elimination measures of the dock drainage system.

[0005] The technical solution adopted by the present application is: a dock drainage pump pool rectification and swirl elimination test device, comprising an inlet part one, an inlet part two and an inlet part three simulating a dock drainage corridor; a test part simulating a pump pool and a connecting part simulating a connecting area between the dock drainage corridor and the pump pool;

[0006] The connecting part is a hollow structure, comprising a connecting port one, a connecting port two, a connecting port three and a connecting port four which are in communication with the hollow inner cavity, wherein the connecting port one and the connecting port three are oppositely arranged, and the connecting port two and the connecting port four are oppositely arranged;

[0007] The inlet part one is detachably connected with the connecting port one; the inlet part two is detachably connected with the connecting port two; the inlet part three is detachably connected with the connecting port three; and the test part is detachably connected with the connecting port four;

[0008] The rectifier device installation area is arranged at the four corners of the connecting part; the drainage pump suction inlet is arranged at the test part, and the despinning device installation area is arranged at the end of the test part away from the connecting part and close to the drainage pump suction inlet;

[0009] The observation windows are arranged at the top wall and the bottom wall of the connecting part, at the left and right sides of the four corners of the connecting part, and at the outer periphery of the test part. The observation windows on the top wall and the bottom wall of the connecting part cover the water inlet area and the rectifier device installation area.

[0010] Further, the baffle is detachably clamped between the inlet part one and the connecting part one of the connecting part to block the connecting passage between the inlet part one and the connecting part.

[0011] The baffle is detachably clamped between the inlet part two and the connecting part two of the connecting part to block the connecting passage between the inlet part two and the connecting part.

[0012] The baffle is detachably clamped between the inlet part three and the connecting part three of the connecting part to block the connecting passage between the inlet part three and the connecting part.

[0013] Further, the sealing gasket is clamped between the baffle and the inlet part one and between the baffle and the connecting part one.

[0014] The sealing gasket is clamped between the baffle and the inlet part two and between the baffle and the connecting part two.

[0015] The sealing gasket is clamped between the baffle and the inlet part three and between the baffle and the connecting part three.

[0016] The sealing gasket is clamped between the connecting part four and the test part.

[0017] Further, the inlet part one and the connecting part one, the inlet part two and the connecting part two, the inlet part three and the connecting part three, and the test part and the connecting part four are connected by the butt buckle type clamp.

[0018] Further, the drainage pump suction inlet includes a horn-shaped horn inlet in the test part inner cavity and an outlet for connecting the drainage pump.

[0019] Further, the walls of the test part in four directions except the water inlet direction and the water outlet direction are provided with observation windows; the observation windows include window holes reserved on the test part walls and glass sheets covered on the window holes, the periphery of the glass sheets is pressed and mounted on the walls of the test part by the pressing plate, and rubber sealing pads are arranged between the glass sheets and the walls of the test part and between the glass sheets and the pressing plate.

[0020] Further, a dye filling port one is arranged on the bottom wall of the connection interface one of the adapter; a dye filling port two is arranged on the bottom wall of the connection interface two of the adapter; a dye filling port three is arranged on the bottom wall of the connection interface three of the adapter; and a dye filling port four is arranged on the bottom wall of the testing part far from the adapter.

[0021] The method is tested by using the dock drainage pump pool rectification and anti-test device,

[0022] Step one, inject tracer particles with good tracking and reflective properties into the water inlet of the dock drainage pump pool rectification and anti-test device; use a laser through a sheet light source lens to illuminate the flow field of the testing part through the observation window, and at the same time, use a PIV special cross-frame CCD camera to shoot the flow field through the observation window of the testing part, and the shooting direction of the PIV special cross-frame CCD camera is perpendicular to the laser irradiation surface in the testing part;

[0023] Step two, digitize the images shot by the PIV special cross-frame CCD camera into a computer to obtain the velocity field distribution in the flow field and quantitatively analyze the dock pump pool drainage.

[0024] Further, the specific operation of step one is:

[0025] An orthogonal coordinate system is established with the axial direction of the testing part as the Z axis, the vertical direction as the Y axis, and the horizontal direction of the front end surface of the testing part as the X axis;

[0026] The laser light source illuminates the inside of the testing part through the observation window at the front end of the testing part;

[0027] Along the X axis direction, gradually adjust from one side of the testing part to the other side to form laser irradiation surfaces Vi in the testing part, where i=1 / 2 / 3……n, n is an integer greater than or equal to 2, and each laser irradiation surface Vi is shot;

[0028] Along the Y axis direction, gradually adjust from one side of the testing part to the other side to form laser irradiation surfaces Hj in the testing part, where j=1 / 2 / 3……m, m is an integer greater than or equal to 2, and each laser irradiation surface Hj is shot;

[0029] The laser irradiation surface Vi is perpendicular to the laser irradiation surface Hj.

[0030] The dock drainage pump pool rectification vortex elimination test device has the advantages that the entrance part one, the entrance part two and the entrance part three are used for testing the influence of different drainage flow channel schemes on the flow field flow state; the rectification device placement area is used for installing a rectification device, and is used for testing the influence of a rectification scheme on the flow field flow state; the vortex elimination device placement area is used for installing a vortex elimination device, and is used for testing the influence of a vortex elimination scheme on the flow field flow state, the test is comprehensive, the device is simple, and the actual design is facilitated.

[0031] The test method realizes a non-contact measurement method by using a particle image velocimetry (PIV), obtains the distribution of fluid flow state in the flow field with high precision under the premise of not interfering with the flow process, and thus quantitatively analyzes the generation and growth mechanism of the pump pool vortex of the dock, and can quantitatively test and test the influence and optimization effect of different drainage flow channel arrangement schemes, different rectification devices, different vortex elimination devices and different water intake schemes on the flow field at the pump suction inlet position. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 Fig. 1 is a structural schematic view of the test device;

[0033] Figure 2 Fig. 2 is a front view of the test part;

[0034] Figure 3 Fig. 3 is a right view of the test part;

[0035] Figure 4 Fig. 4 is a component connection section schematic view;

[0036] Figure 5 Fig. 5 is a front view of the butt buckle clamp;

[0037] Figure 6 Fig. 6 is a top view of the butt buckle clamp;

[0038] Figure 7 Fig. 7 is a shooting surface distribution schematic view;

[0039] Figure 8 Fig. 8 is a shooting surface distribution schematic view.

[0040] In the figure, the entrance part one 1, the entrance part two 2, the entrance part three 3, the test part 4, the drainage pump suction inlet 4A, the horn inlet 4A1, the outlet 4A2, the racemization device installation area 4B, the connection part 5, the connection port one 5A, the connection port two 5B, the connection port three 5C, the connection port four 5D, the rectification device installation area 5E, the docking buckle clamp 6, the lock hook 6A, the connecting plate part 6A1, the hook part 6A2, the lock hook connecting hole 6A3, the lock buckle 6B, the fastener 6B1, the base 6B2, the ear seat 6B3, the ear plate 6B4, the connecting rod 6B5, the lock handle 6B6, the lock buckle connecting hole 6B7, the observation window 7, the glass sheet 7A, the pressing plate 7B, the flange 8A, the boss 8B, the baffle 9, the sealing washer 10, the camera 11, the laser irradiation surface 12, the dye filling port one R1, the dye filling port two R2, the dye filling port three R3, and the dye filling port four R4. DETAILED DESCRIPTION

[0041] The application will be further described below in conjunction with the drawings and examples as follows:

[0042] The "upper", "top", such as "top wall", "top" and "top end", "bottom", such as "bottom wall", "bottom" and "bottom end", "left" and "right" and other directions or position relationships indicated in the specification are based on the drawings and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application. Figure 2 The directions or position relationships shown are only for the convenience of describing the application and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0043] The dock drainage pump pool rectification and racemization test device, as shown in the figure, comprises an entrance part one 1, an entrance part two 2 and an entrance part three 3 simulating the entrance of the dock drainage corridor; a test part 4 simulating the pump pool; and a connection part 5 simulating the connection area between the dock drainage corridor and the pump pool. Figure 1 The dock drainage pump pool rectification and racemization test device disclosed by the application is made of the size obtained by proportionally reducing the drainage structure formed by the dock drainage corridor and the drainage pump pool, and a rectangular cross section similar to the dock drainage corridor and the pump pool is taken according to the similarity principle. The entrance part one 1, the entrance part two 2 and the entrance part three 3 are similar in structure to the dock drainage corridor and are used to simulate the dock drainage corridor, that is, when it is necessary to empty the water in the dock, the water gate on the drainage corridor needs to be opened, the water in the dock enters the drainage pump house through the drainage corridor, and then the water is discharged through the drainage pump. The test part 4 is similar in structure to the pump pool and is used to simulate the pump pool. The connection part 5 is used to simulate the connection area of the connection between the drainage corridor and the drainage pump pool.

[0044] According to the dock layout and the internal arrangement of the pump house, the water direction of the drainage pump pool may not be the same, the pump pool may come from the same direction as the inlet part 1, the same direction as the inlet part 2 and the same direction as the inlet part 3, when two adjacent docks share a drainage pump house, the drainage pump house is usually arranged in the middle position adjacent to the dock opening side of the two docks, and the pump pool may be connected to the inlet part 1 and the inlet part 3 at the same time, but the simultaneous drainage of the two docks usually does not occur. Therefore, the arrangement of the inlet part 1, the inlet part 2 and the inlet part 3 can well simulate the water environment.

[0045] The adapter 5 is a hollow structure, including an adapter port 5A, an adapter port 5B, an adapter port 5C and an adapter port 5D which are connected with the hollow cavity, wherein the adapter port 5A and the adapter port 5C are oppositely arranged, and the adapter port 5B and the adapter port 5D are oppositely arranged. Opposite arrangement means that the adapter port 5A and the adapter port 5C are coaxially arranged on the left and right sides of the adapter 5, and the adapter port 5C and the adapter port 5D are coaxially arranged on the left and right sides of the adapter 5. The main purpose of this arrangement is to connect with the inlet part 1, the inlet part 2, the inlet part 3 and the test part 4.

[0046] The inlet part 1 is detachably connected with the adapter port 5A; the inlet part 2 is detachably connected with the adapter port 5B; the inlet part 3 is detachably connected with the adapter port 5C; and the test part 4 is detachably connected with the adapter port 5D. The detachable connection can be achieved by disassembling the inlet part 1, the inlet part 2, the inlet part 3 and the test part 4 to install the required components. For example, when the inlet part 1 is water, the inlet part 2 and the inlet part 3 can be opened to block the adapter port 5B and the adapter port 5C to prevent the inlet part 2 and the inlet part 3 from being water; when the inlet part 2 is water, the inlet part 1 and the inlet part 3 can be opened to block the adapter port 5A and the adapter port 5C to prevent the inlet part 1 and the inlet part 3 from being water, and so on.

[0047] When the water direction is consistent with the direction of the inlet part 1 or the direction of the inlet part 3, the flow channel will inevitably be L-shaped, which will affect the flow field distribution. This situation is particularly obvious when two drainage pumps are arranged in parallel in the pump house and both pumps are in operation. If effective measures are not taken, the flow field may be disordered, the swirl angle of the pump suction inlet may be too large, the flow velocity difference between the two pumps may be obvious, and significant vortex may appear in the flow field. To solve this problem, a feasible measure is to set a corresponding flow regulating device at the inlet position of the drainage pump pool. The present application provides a flow regulating device installation area 5E at the adapter port 5D, and the flow regulating device installation area 5E is used to install the flow regulating device to test the optimization effect of the flow regulating device on the flow field flow state.

[0048] A drainage pump suction inlet 4A is arranged at the test section 4. At the position of the pump pool drainage pump suction inlet, the water flow is relatively turbulent, and part of the water will be discharged upward along the vertical direction through the drainage pump, and another part of the water will impact the pool wall horizontally. The reverse force generated by the impact of the pool wall will be mixed with the impact force of the incoming water to generate a vortex at the water pump suction inlet. The vortex will cause water pump noise and vibration, and long-term operation will also cause water pump cavitation problems. The deswirler device can improve the above problems. Therefore, in the present embodiment, a deswirler device mounting area 4B is arranged at the end of the test section 4 away from the connection section 5 and adjacent to the drainage pump suction inlet 4A. By installing the deswirler device into the deswirler device mounting area 4B, the optimization effect of the flow field flow state of the deswirler device can be tested.

[0049] The test section 4 and the connection section four 5D are detachably connected, and different rectifier devices or deswirler devices can be replaced for testing by opening the connection head of the test section 4 and the connection section four 5D, so as to select the most suitable rectifier device or deswirler device. In addition, test sections 4 with different water intake forms such as bottom water suction, side water suction, and upper water suction can also be replaced to test the influence of different drainage pump suction inlet positions on the flow field flow state.

[0050] In order to accurately observe the flow field conditions in the flow channel and the pump pool, observation windows 7 are arranged on the top wall and the bottom wall of the connection section 5, on the left and right sides of the connection section four 5D, and on the outer periphery of the test section 4. The observation windows 7 on the top wall and the bottom wall of the connection section 5 cover the incoming water area and the rectifier device mounting area 5E.

[0051] The opening and closing of each inlet section can be realized by setting electric valves and the like, but this increases the cost and brings inconvenience to installation and subsequent maintenance. In the present application, as shown in Figure 4 The baffle 9 is detachably clamped between the inlet section one 1 and the connection section one 5A of the connection section 5 for blocking the connection passage between the inlet section one 1 and the connection section 5;

[0052] The baffle 9 is detachably clamped between the inlet section two 2 and the connection section two 5B of the connection section 5 for blocking the connection passage between the inlet section two 2 and the connection section 5;

[0053] The baffle 9 is detachably clamped between the inlet section three 3 and the connection section three 5C of the connection section 5 for blocking the connection passage between the inlet section three 3 and the connection section 5.

[0054] By arranging the baffle 9 between the inlet section one 1 and the connection section one 5A, the inlet section two 2 and the connection section two 5B, and the inlet section three 3 and the connection section three 5C, the flow field conditions under different drainage flow channel conditions can be tested. For example, the baffle 9 can block one or two of the inlet section one 1, the inlet section two 2, and the inlet section three 3.

[0055] The baffle 9 is arranged on the contact surface of the corresponding inlet part and the corresponding adapter part 5, and has a rectangular planar plate structure with a size consistent with that of the inlet part and the adapter part. The baffle 9 can be clamped and fixed on the contact surface of the two parts by a snap clamp to achieve the sealing function.

[0056] To ensure good sealing, preferably, a sealing gasket 10 is arranged between the baffle 9 and the inlet part 1, and between the baffle 9 and the adapter part 1A; a sealing gasket 10 is arranged between the baffle 9 and the inlet part 2, and between the baffle 9 and the adapter part 2B; a sealing gasket 10 is arranged between the baffle 9 and the inlet part 3, and between the baffle 9 and the adapter part 3C; and a sealing gasket 10 is arranged between the adapter part 4D and the test part 4.

[0057] The inlet part and the corresponding adapter part can be connected by bolts, and in the embodiment, the inlet part 1 and the adapter part 1A, the inlet part 2 and the adapter part 2B, the inlet part 3 and the adapter part 3C, and the test part 4 and the adapter part 4D are connected by butt snap clamps 6. The butt snap clamps 6 are convenient to install and use, and are easy to disassemble and assemble, and have high working efficiency.

[0058] Specifically, the butt snap clamp 6 includes a lock hook 6A and a lock buckle 6B. The lock hook 6A includes a connecting plate part 6A1 and a hook-shaped hook part 6A2 at one end of the connecting plate part 6A1, and a lock hook connecting hole 6A3 is formed in the connecting plate part 6A1. The lock buckle 6B includes a buckle part 6B1, a base 6B2, and an ear seat 6B3 arranged at one end of the base 6B2. A pair of oppositely arranged ear plates 6B4 are hinged to the ear seat 6B3, and a connecting rod 6B5 is hinged to a distance between the pair of ear plates 6B4 away from the ear seat 6B3. A lock handle 6B6 is arranged between the ends of the pair of ear plates 6B4. One end of the buckle part 6B1 is connected to the middle of the connecting rod 6B5, and the other end is hung with the hook part 6A2. A lock buckle connecting hole 6B7 is formed in the base 6B2. The butt snap clamp 6 has a simple structure, is quick to disassemble and assemble, and has stable clamping force. Compared with bolt connection, the butt snap clamp 6 has high efficiency.

[0059] To avoid drilling holes on the walls of the inlet part 1 and the adapter part 1A and affecting the sealing performance, preferably, a circumferentially outwardly extending flange 8A is arranged on the outer wall of the corresponding part of the inlet part 1 and the adapter part 1A, and a boss 8B protruding in the axial direction is arranged on the flange 8A in the axial direction. The butt snap clamp 6 is fixed on the boss 8B.

[0060] Preferably, as shown in Figure 2 and Figure 3 The drainage pump suction inlet 4A includes a horn-shaped horn inlet 4A1 in the inner cavity of the test part 4 and an outlet 4A2 for connecting the drainage pump. The horn-shaped horn inlet 4A1 is more conducive to water suction.

[0061] The position of the drainage pump suction inlet 4A is top suspension suction mode, in order to realize accurate capture of flow field information and realize flow field testing such as dye tracing, high-speed photography, PIV flow field capture, preferably, the wall surface of the four directions of the testing part 4 except the water inlet direction and the water outlet direction is provided with an observation window 7; the observation window 7 includes a window hole reserved on the wall surface of the testing part 4 and a glass sheet 7A covered on the window hole, the periphery of the glass sheet 7A is pressed and fitted on the wall surface of the testing part 4 through the pressing plate 7B, in order to ensure the sealing, rubber sealing pads are arranged between the glass sheet 7A and the wall surface of the testing part 4 and between the glass sheet 7A and the pressing plate 7B. The situation of the position of the drainage pump suction inlet 4A can be directly observed through the observation window, and the flow field testing function is realized at the same time.

[0062] In order to be able to observe by dye tracing method, the flow field situation in the flow channel and the pump pool can be directly observed by naked eyes, the position where vortex may occur can be found, the generation and intensity of vortex can be observed, the effect of the flow regulating device and the vortex eliminating device can be tested, and at the same time, the observation can be directly recorded in the form of photos or videos through the camera equipment. Preferably, the dye filling port one R1 is arranged on the bottom wall of the connection port one 5A of the connection part 5; the dye filling port two R2 is arranged on the bottom wall of the connection port two 5B of the connection part 5; the dye filling port three R3 is arranged on the bottom wall of the connection port three 5C of the connection part 5; and the dye filling port four R4 is arranged on the bottom wall of the end of the testing part 4 away from the connection part 5. Each dye filling hole is controlled to be opened or closed according to the water inlet direction, for example, when the water inlet from the inlet part one 1, the dye filling port one R1 is opened, and the dye filling port two R2 and the dye filling port three R3 are closed; when the water inlet from the inlet part two 2, the dye filling port two R2 is opened, and the dye filling port one R1 and the dye filling port three R3 are closed; when the water inlet from the inlet part three 3, the dye filling port three R3 is opened, and the dye filling port one R1 and the dye filling port two R2 are closed. The dye filling port four R4 is used for flow field visualization testing at the position of the drainage pump suction inlet 4A.

[0063] The present application discloses a test method using the test device for the flow regulating and vortex eliminating of the dock drainage pump pool, which uses the PIV particle image velocimetry technology to quantitatively test the flow field situation and the optimization effect of the flow regulating and vortex eliminating device. The PIV technology is a kind of instantaneous, multi-point and non-contact fluid mechanics velocity measurement method. Some tracking and reflective particles are scattered in the flow field; the laser sheet is irradiated to the section area of the measured flow field; the particle images of two or more times of exposure are continuously taken by the imaging recording system; the PIV images are analyzed by using the image correlation method, the average displacement of the particle images in each small area is obtained, and the two-dimensional fluid velocity distribution of the whole area on the flow field section is determined.

[0064] The experimental method disclosed in this invention involves injecting tracer particles with good tracking and reflectivity into the incoming water of the dock drainage pump pool rectification and deswirl test device. For example, if water comes in from inlet 1, tracer particles with good tracking and reflectivity are injected into the incoming water of inlet 1; if water comes in from inlet 2, tracer particles with good tracking and reflectivity are injected into the incoming water of inlet 2; if water comes in from inlet 3, tracer particles with good tracking and reflectivity are injected into the incoming water of inlet 3.

[0065] A laser beam is used to illuminate the flow field of the test section 4 through the observation window 7 from the front face of the test section 4. Simultaneously, dedicated PIV (Picture-in-the-Video) cross-frame CCD cameras mounted on both sides of the test section 4 capture images of the flow field through the observation windows 7 on both sides. It is worth noting that the shooting angle of the PIV cross-frame CCD cameras is perpendicular to the laser illumination surface 12. Multiple laser beam illumination surfaces are formed on the front face of the test section 4, and images are taken from each surface. The spacing between the laser beam illumination surfaces can be equal or unequal; naturally, the smaller the spacing, the higher the testing accuracy. After capturing images from one direction of the laser light source, the direction of the laser light source can be adjusted. For example, if the laser illumination surface formed by the laser light source is horizontal, the shooting direction of the PIV cross-frame CCD cameras can be adjusted accordingly to always be perpendicular to the laser illumination surface, thereby obtaining a more comprehensive three-dimensional distribution of the flow field.

[0066] A rectangular coordinate system is established with the axial direction of the test section 4 as the Z-axis, the vertical direction as the Y-axis, and the horizontal direction of the front end face of the test section 4 as the X-axis;

[0067] like Figure 7 In the embodiment shown, a laser light source illuminates the interior of the test section 4 through the observation window 7 at the front end of the test section 4;

[0068] Along the X-axis, starting from the left side of the test unit 4, the laser light source illuminates the test unit 4, forming a laser illumination surface V1 parallel to the YZ plane in the test unit 4. After photographing the laser illumination surface V1 using the PIV-dedicated cross-frame CCD camera 11, the camera moves to the right side of the test unit 4, forming a laser illumination surface V2 in the test unit 4. After photographing the laser illumination surface V2 using the PIV-dedicated cross-frame CCD camera 11, the camera is adjusted again until it moves to the right side of the test unit 4, forming a laser illumination surface Vn. After photographing the laser illumination surface Vn, the imaging in this direction ends.

[0069] Adjust the direction of the laser light source, such as Figure 8As shown, the laser irradiation surface Hj parallel to the XZ plane is formed. Along the Y-axis direction, the laser irradiation surface H1 is formed at the bottom end of the test section 4, and then the PIV special cross-frame CCD camera 11 is used to take a picture of the laser irradiation surface H1. After that, the laser irradiation surface H2 is formed at the top end of the test section 4, and then the PIV special cross-frame CCD camera 11 is used to take a picture of the laser irradiation surface H2. After that, the laser irradiation surface Hn is formed at the top end of the test section 4, and then the PIV special cross-frame CCD camera 11 is used to take a picture of the laser irradiation surface Hn. After that, the picture taking in this direction is completed.

[0070] Of course, the laser irradiation surface Hj can be formed first, and then the laser light source irradiation direction is adjusted to take a picture of the laser irradiation surface Vi.

[0071] Through the above method, the image information of the flow field at the pump pool drainage pump inlet position can be obtained comprehensively, and the image is digitized and sent to the computer. By using the autocorrelation or cross-correlation principle processing, the velocity field distribution in the flow field can be obtained, so that the generation and growth mechanism of the whirlpool in the dock pump pool can be quantitatively analyzed. Different drainage channel layout schemes, different flow straightening devices, different despinning devices, different water intake schemes can be tested quantitatively to test the influence of the flow field at the water pump suction inlet position and the optimization effect.

Claims

1. A test apparatus for rectifying and deswirl in a dock drainage pump pool, characterized in that: It includes an entrance section 1 (1), an entrance section 2 (2), and an entrance section 3 (3) of the simulated dock drainage channel; a test section (4) of the simulated pump pool; and a connection section (5) of the connection area between the simulated dock drainage channel and the pump pool. The connecting part (5) is a hollow structure, including connecting port one (5A), connecting port two (5B), connecting port three (5C) and connecting port four (5D) which are connected to the hollow inner cavity. Connecting port one (5A) and connecting port three (5C) are arranged opposite to each other, and connecting port two (5B) and connecting port four (5D) are arranged opposite to each other. The first entrance (1) is detachably connected to the first connector (5A); the second entrance (2) is detachably connected to the second connector (5B); the third entrance (3) is detachably connected to the third connector (5C); and the test section (4) is detachably connected to the fourth connector (5D). A rectifier placement area (5E) is provided at the connection port 4 (5D); a drain pump inlet (4A) is provided in the test section (4); and an anti-swirl device placement area (4B) is provided at the end of the test section (4) away from the connection section (5) and near the drain pump inlet (4A). Observation windows (7) are provided on the top and bottom walls of the connecting part (5), on the left and right sides of the connecting port (5D), and on the outer periphery of the test part (4). The observation windows (7) on the top and bottom walls of the connecting part (5) cover the incoming water area and the rectifier installation area (5E). A detachable clamping baffle (9) is provided between the inlet (1) and the connecting port (5A) of the connecting part (5) to block the connection passage between the inlet (1) and the connecting part (5); A detachable clamping baffle (9) is provided between the second entrance (2) and the second connection port (5B) of the connecting part (5) to block the connection passage between the second entrance (2) and the connecting part (5); A detachable clamping baffle (9) is provided between the inlet section 3 (3) and the connecting port 3 (5C) of the connecting section (5) to block the connection passage between the inlet section 3 (3) and the connecting section (5); The drain pump inlet (4A) includes a horn-shaped inlet (4A1) located inside the test section (4) and an outlet (4A2) for connecting the drain pump.

2. The dock drainage pump pool rectification and deswirl test device as described in claim 1, characterized in that: Clamping sealing gaskets (10) are respectively provided between the baffle (9) and the inlet part (1) and between the baffle (9) and the connecting port (5A); Clamping sealing gaskets (10) are respectively provided between the baffle (9) and the inlet part 2 (2) and between the baffle (9) and the connecting port 2 (5B); Clamping sealing gaskets (10) are respectively provided between the baffle (9) and the inlet section three (3) and between the baffle (9) and the connecting port three (5C); A clamping sealing gasket (10) is provided between the connector 4 (5D) and the test section (4).

3. The dock drainage pump pool rectification and deswirl test device as described in claim 1 or 2, characterized in that: The entrance section 1 (1) is connected to the connection port 1 (5A), the entrance section 2 (2) is connected to the connection port 2 (5B), the entrance section 3 (3) is connected to the connection port 3 (5C), and the test section (4) is connected to the connection port 4 (5D) respectively using a docking snap-fit ​​clamp (6).

4. The dock drainage pump pool rectification and deswirl test device as described in claim 1 or 2, characterized in that: The test section (4) is provided with observation windows (7) on the walls of the four directions other than the water inlet and water outlet directions. The observation window (7) includes a window opening reserved on the wall of the test section (4) and a glass plate (7A) covering the window opening. The glass plate (7A) is pressed onto the wall of the test section (4) by a pressure plate (7B) around its perimeter. Rubber sealing gaskets are provided between the glass plate (7A) and the wall of the test section (4) and between the glass plate (7A) and the pressure plate (7B).

5. The dock drainage pump pool rectification and deswirl test device as described in claim 1 or 2, characterized in that: A dye filling port 1 (R1) is provided on the bottom wall of the first connection port (5A) of the connecting part (5); a dye filling port 2 (R2) is provided on the bottom wall of the second connection port (5B) of the connecting part (5); a dye filling port 3 (R3) is provided on the bottom wall of the third connection port (5C) of the connecting part (5); and a dye filling port 4 (R4) is provided on the bottom wall of the test part (4) at the end away from the connecting part (5).

6. The test method using the rectification and deswirl test apparatus for the dock drainage pump pool as described in claim 1, characterized in that: Step 1: Inject tracer particles with good tracking and reflectivity into the incoming water of the dock drainage pump pool rectification and deswirl test device; use a laser through the light source lens to illuminate the flow field of the test section (4) through the observation window (7); at the same time, use a camera (11) to photograph the flow field through the observation window (7) of the test section (4); the shooting direction of the camera (11) is perpendicular to the laser irradiation surface (12) of the laser in the test section (4). Step 2: Digitize the images captured by the camera (11) and send them to the computer to obtain the velocity field distribution in the flow field and quantitatively analyze the drainage of the dock pump pool.

7. The test method as described in claim 6, characterized in that: Step one involves the following steps: A rectangular coordinate system is established with the axial direction of the test part (4) as the Z-axis, the vertical direction as the Y-axis, and the horizontal direction of the front end face of the test part (4) as the X-axis; A laser light source illuminates the interior of the test section (4) through the observation window (7) at the front end of the test section (4); Along the X-axis, starting from one side of the test section (4) and gradually adjusting to the other side, a laser irradiation surface Vi is formed in the test section (4), where i = 1 / 2 / 3...n, and n is an integer greater than or equal to 2. Each laser irradiation surface Vi is photographed. Along the Y-axis, starting from one side of the test section (4) and gradually adjusting to the other side, a laser irradiation surface Hj is formed in the test section (4), where j = 1 / 2 / 3...m, and m is an integer greater than or equal to 2. Each laser irradiation surface Hj is photographed. The laser irradiation surface Vi is perpendicular to the laser irradiation surface Hj.

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