A molten aluminum erosion performance testing device

Abstract

The application relates to the technical field of material performance testing, in particular to an aluminum liquid corrosion performance testing device, which comprises a machine body, and the inside of the machine body is provided with a preparation mechanism for preparing an aluminum liquid sample, a positioning mechanism for fixing a to-be-detected piece, a first pipeline with an inlet communicated with the outlet of the preparation mechanism through a conveying pipe, a second pipeline communicated with the outlet of the first pipeline, at least one atomizing nozzle arranged on the side wall of the second pipeline and communicated with the inside of the second pipeline through a liquid passing opening one, a mounting frame arranged at the bottom of the second pipeline, a drop pipe connected to the bottom of the mounting frame, two partitions relatively rotatably arranged in the inside of the second pipeline and used for selectively blocking the liquid passing opening one or the inlet of the mounting frame so as to switch the discharge mode of the aluminum liquid sample from the atomizing nozzle or the drop pipe, and a transmission component used for driving the two partitions to relatively rotate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material performance testing, and particularly relates to an aluminum liquid corrosion performance testing device. BACKGROUND

[0002] In the field of aluminum processing and related material research and development, it is crucial to accurately evaluate the performance of materials in the aluminum liquid corrosion environment. Aluminum liquid corrosion performance testing can provide key basis for material selection, optimization, and production process improvement, directly affecting the quality and reliability of products.

[0003] At present, although there are some aluminum liquid corrosion performance testing devices on the market, most of these devices have single function and many limitations. On the one hand, the bubbles contained in the aluminum liquid sample have a significant impact on the test results. The bubbles change the density and thermal physical properties of the aluminum liquid, change the actual contact area and mode of the aluminum liquid and the detection piece, and cause deviation in the evaluation of the instantaneous thermal shock damage to the detection piece. In the long-term contact corrosion process, the rupture of bubbles will cause abnormal flow of local aluminum liquid, and the randomness of bubbles will cause large differences in test results under the same conditions, seriously affecting the repeatability and reliability of the test.

[0004] On the other hand, the existing testing devices are not flexible enough in controlling the discharge mode of the aluminum liquid sample. In actual application, the contact mode of aluminum liquid and materials is various, which may be in the form of dripping or fine spraying. However, most testing devices can only realize a single discharge mode and cannot quickly switch according to actual needs, which greatly limits the application range of the device and increases the testing cost and time.

[0005] Moreover, during the discharge of the aluminum liquid, the residual aluminum liquid sample may block the dripping pipe or the spray hole, affecting the accuracy and stability of subsequent tests. The existing devices usually do not have effective solutions to this problem, increasing the uncertainty and maintenance cost in the testing process.

[0006] Therefore, an aluminum liquid corrosion performance testing device is proposed to solve the problems of the influence of bubbles on the experiment and the single discharge mode of the aluminum liquid sample. SUMMARY

[0007] The purpose of the present application is to solve the following shortcomings in the prior art: the liquid discharge structure for discharging the aluminum liquid sample in the existing testing device cannot simulate the dripping or fine spraying of aluminum liquid samples with different flow rates to the surface of the detection piece according to the needs, and the dripping and fine spraying of the aluminum liquid sample require two independent liquid discharge structures, which has poor practicability. At the same time, the bubbles contained in the aluminum liquid sample cannot be eliminated in advance during the discharge of the aluminum liquid sample, which will affect the test results, and even cause the aluminum liquid sample to splash, causing adhesion, blockage and other threats to other components. Therefore, an aluminum liquid corrosion performance testing device is proposed.

[0008] To achieve the above object, the present application adopts the following technical solutions:

[0009] The molten aluminum erosion performance testing device comprises a body, and the body is internally provided with:

[0010] A preparation mechanism for preparing a molten aluminum sample;

[0011] A positioning mechanism for fixing a to-be-detected piece;

[0012] A first pipeline, an inlet of which is communicated with an outlet of the preparation mechanism through a conveying pipe;

[0013] A second pipeline, which is communicated with an outlet of the first pipeline;

[0014] At least one atomizing nozzle, which is arranged on a side wall of the second pipeline and communicated with the inside of the second pipeline through a liquid passage one;

[0015] A mounting frame, which is arranged at the bottom of the second pipeline, and a drip pipe is connected to the bottom of the mounting frame;

[0016] Two partition plates, which are arranged in the second pipeline in a relatively rotatable manner, are used to selectively block the liquid passage one or the inlet of the mounting frame to switch the molten aluminum sample to be discharged from the atomizing nozzle or the drip pipe;

[0017] A transmission component, which is used to drive the two partition plates to rotate relative to each other;

[0018] A piston block, which is movably arranged in the second pipeline, is used to extrude the molten aluminum sample to enter the atomizing nozzle from the liquid passage one; and

[0019] A driving assembly, which is used to drive the piston block to move in the second pipeline;

[0020] The positioning mechanism is located below the atomizing nozzle and the drip pipe.

[0021] Further, the transmission component comprises:

[0022] Two rotating rods, one end of each of which is fixedly connected to the two partition plates, and the other end of each of which penetrates out of the second pipeline and is provided with a threaded groove;

[0023] Two second threaded rods, one end of each of which is threadedly installed in the two threaded grooves;

[0024] A sliding block, which is connected to the other end of the two second threaded rods, and the sliding block cannot rotate;

[0025] A first threaded rod, which is threadedly connected to the sliding block, is used to drive the sliding block to move with the second threaded rod, and then drive the rotating rod to rotate through the threaded groove and the threaded cooperation of the second threaded rod.

[0026] Furthermore, the positioning mechanism includes a support platform and multiple telescopic cylinders. The support platform is used to place the part to be tested, and the drive end of each telescopic cylinder is connected to the bottom of the support platform to adjust the tilt angle of the support platform.

[0027] Furthermore, the first pipe is equipped with a defoaming assembly for eliminating air bubbles in the molten aluminum sample. The defoaming assembly includes:

[0028] A movable block is movably and rotatably disposed within the first pipe;

[0029] The spiral blades are fixedly installed on the outer periphery of the moving block;

[0030] The rotating shaft is fixedly connected coaxially to the moving block.

[0031] The third threaded rod is fixedly installed. It passes through the rotating shaft and is threaded into the threaded opening on the rotating shaft to drive the moving block and the helical blade to rotate when the moving block moves up and down.

[0032] Vent holes are located on the top of the moving block to expel air bubbles;

[0033] A drive unit is used to drive the moving block to move up and down within the first pipe.

[0034] Furthermore, the vent extends through the top of the movable block and communicates with the interior of the first pipe.

[0035] Furthermore, the piston block is connected below the moving block, and a rectangular groove is opened at the bottom of the moving block. A second baffle is elastically installed in the rectangular groove by a spring. A pressure block that cooperates with the second baffle is provided on the inner wall of the first pipe. When the moving block drives the piston block to move down until the second baffle contacts the pressure block, the second baffle compresses the spring and retracts into the rectangular groove, so that the aluminum liquid sample flows into the second pipe from below the moving block.

[0036] Furthermore, the machine body is also equipped with:

[0037] At least one robotic arm, with a high-speed camera and / or infrared thermal imager mounted on its drive end;

[0038] Multiple temperature sensors are mounted on the upper surface of the support platform of the positioning mechanism;

[0039] The image analysis and processing unit is electrically connected to the high-speed camera, the infrared thermal imager, and the temperature sensor, respectively.

[0040] The delivery pipe is equipped with a flow control valve, and the positioning mechanism also includes a clamping assembly for fixing the workpiece to be tested.

[0041] In another aspect of the present invention, a method for testing the erosion performance of molten aluminum includes the following steps:

[0042] S1: Prepare the molten aluminum sample through the preparation mechanism, and position the to-be-detected piece through the positioning mechanism;

[0043] S2: According to the required molten aluminum sample discharge mode, control the relative rotation of the two partitions through the transmission component to switch the molten aluminum sample discharge from the atomizing nozzle or the dropping pipe;

[0044] S3: Deliver the molten aluminum sample in the preparation mechanism to the first pipeline through the delivery pipe;

[0045] S4: After the molten aluminum sample flows into the second pipeline from the first pipeline, if it is a dropping mode, the molten aluminum sample is naturally dropped from the dropping pipe to the surface of the to-be-detected piece under the action of gravity; if it is a refining spraying mode, the piston block is driven to move downward through the driving assembly, the molten aluminum sample is extruded from the liquid passage into the atomizing nozzle and sprayed to the surface of the to-be-detected piece.

[0046] Further, in step S3, the molten aluminum sample is subjected to bubble elimination treatment in the first pipeline through the defoaming assembly;

[0047] Before or during step S3, the residual gas or molten aluminum in the first pipeline and the second pipeline is sprayed from the dropping pipe or the atomizing nozzle by driving the piston block to move downward, so as to perform pre-cleaning.

[0048] Further, in step S4, the to-be-detected piece is reciprocally tilted by controlling the extension and retraction amount of the telescopic cylinder of the positioning mechanism;

[0049] In step S4, the dynamic picture of the contact between the molten aluminum and the to-be-detected piece is captured by the high-speed camera, the surface temperature of the to-be-detected piece is monitored by the infrared thermal imager and the temperature sensor, and the collected data is analyzed and processed by the image analysis processing unit.

[0050] Compared with the prior art, the beneficial effects of the present application are:

[0051] 1. The defoaming assembly is arranged in the first pipeline, including a spiral blade and a through-hole structure. During the downward movement of the molten aluminum sample, the spiral blade rotates to form a local shear flow to the molten aluminum, so that large bubbles are torn into small bubbles, and the small bubbles are more easily dissolved and floated; at the same time, the spiral blade rotates to drive the molten aluminum to make a circular motion to generate a centrifugal force, and the bubbles are gathered to the center of rotation and then floated and discharged. In addition, through the design of the through-flow hole, the arc ring and the cooperating ring and other structures, the molten aluminum with impurities can be further discharged from the pipeline, so as to ensure that the bubbles in the molten aluminum sample are completely eliminated. After the bubbles are eliminated, the state of the molten aluminum sample is basically consistent during each test, so that the test results have comparability, and reliable data support is provided for material research and performance evaluation, and the repeatability and reliability of the test are improved;

[0052] 2. The unique transmission component design is adopted, the first threaded rod is controlled to rotate, the sliding block and the second threaded rod are driven to move, and then the relative rotation of the two partitions is controlled, so that the quick switching of the two discharge modes of aluminum liquid sample dropping and refining spraying is realized. Only one set of liquid discharge structure can meet the needs of different test scenes, improve the practicability and universality of the device, reduce the equipment investment and test time, and reduce the test cost. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 is the internal overall structure schematic diagram of the embodiment of the application;

[0054] Figure 2 is the external overall structure schematic diagram of the embodiment of the application;

[0055] Figure 3 is the first pipeline connection structure schematic diagram of the embodiment of the application;

[0056] Figure 4 is the A area enlarged schematic diagram of the embodiment of the application; Figure 3

[0057] Figure 5 is the atomizing nozzle installation schematic diagram of the embodiment of the application;

[0058] Figure 6 is the second pipeline internal structure schematic diagram of the embodiment of the application;

[0059] Figure 7 is the partition installation structure explosion schematic diagram of the embodiment of the application;

[0060] Figure 8 is the first pipeline and driving device connection schematic diagram of the embodiment of the application;

[0061] Figure 9 is the first pipeline internal structure schematic diagram of the embodiment of the application;

[0062] Figure 10 is the cooperation ring and arc ring cooperation structure schematic diagram of the embodiment of the application;

[0063] Figure 11 is the limiting block and limiting groove cooperation relationship schematic diagram of the embodiment of the application;

[0064] Figure 12 is the baffle one connection position schematic diagram of the embodiment of the application;

[0065] Figure 13 is the spiral blade installation structure schematic diagram of the embodiment of the application;

[0066] Figure 14 is the baffle two installation position schematic diagram of the embodiment of the application; ​

[0067] Figure 15 Figure is a schematic diagram of the positioning mechanism structure of the embodiment of the present application.

[0068] In the figure: 1, body; 2, preparation mechanism; 3, positioning mechanism; 4, mounting ring; 5, first pipeline; 6, atomizing nozzle; 7, liquid passage one; 8, mounting frame; 9, dropping pipe; 10, piston block; 11, second pipeline; 12, mounting plate; 13, rotating rod; 14, partition plate; 15, first threaded rod; 16, sliding block; 17, second threaded rod; 18, threaded groove; 19, telescopic air cylinder; 20, round block; 21, connecting rod; 22, circular ring; 23, moving block; 24, annular groove; 25, rotating shaft; 26, mechanical arm; 27, high-speed camera; 28, infrared thermal imager; 29, temperature sensor; 30, image analysis processing unit; 31, bearing table; 32, three-jaw chuck; 33, hydraulic cylinder; 34, conveying pipe; 35, flow control valve; 36, helical blade; 37, exhaust hole; 38, passage; 39, rectangular groove; 40, baffle two; 41, spring; 42, liquid passage; 43, limiting groove; 44, limiting block; 45, third threaded rod; 46, threaded port; 47, through hole; 48, pressing block; 49, mounting shell; 50, connecting ring; 51, annular chamber; 52, ventilation hole; 53, baffle one; 54, connecting piece; 55, air pump connecting port; 56, liquid passage pipe; 57, liquid passage two; 58, through-flow hole; 59, matching ring; 60, arc-shaped ring; 61, rotating groove. DETAILED DESCRIPTION

[0069] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0070] Reference Figures 1-15 An aluminum liquid corrosion performance testing device includes a body 1.

[0071] As shown in Figure 1 and Figure 2 , a machine door is arranged on the surface of the body 1 and is denoted as “a” in the drawings, and a preparation mechanism 2 for preparing an aluminum liquid sample is arranged in the body 1, the preparation mechanism 2 is used for preparing a standard aluminum liquid sample from the measured castable, the preparation mechanism 2 is a furnace, the furnace can provide a stable high-temperature environment, ensure that the castable is fully melted into aluminum liquid, and can accurately control the temperature to ensure that the prepared aluminum liquid sample meets the standard requirements, at the same time, the furnace is provided with a stirring device for uniformly mixing the castable during smelting, so that the prepared aluminum liquid sample is uniform in composition.

[0072] The bottom of the machine body 1 is provided with a positioning mechanism 3 for supporting and fixing the detection piece, the positioning mechanism 3 comprises a bearing table 31, a three-jaw chuck 32 fixedly installed on the upper surface of the bearing table 31 and a plurality of hydraulic cylinders 33, the plurality of hydraulic cylinders 33 are fixedly installed on the inner bottom of the machine body 1, and the drive shafts of the plurality of hydraulic cylinders 33 are hinged to the lower surface of the bearing table 31, the detection piece is placed on the upper surface of the three-jaw chuck 32, then the three-jaw chuck 32 is used to clamp and fix the detection piece, the hydraulic cylinders 33 are started, and the fixed detection piece can be controlled to move vertically, and the detection piece is denoted as “b” in the drawings.

[0073] As shown in Figure 3 、 Figures 8-14 , the inner wall of the machine body 1 is fixedly installed with two mounting rings 4 through two supporting rods, and the two mounting rings 4 are fixedly provided with a mounting shell 49. The outer wall of the mounting shell 49 is provided with a gas pump connecting port 55 for connecting an external gas pump, and the mounting shell 49 is used to convey gas into the mounting shell 49 through the connecting port. The connecting ring 50 is fixedly connected with the first pipeline 5, and the first pipeline 5 is used to circulate aluminum liquid. The first pipeline 5 and the mounting shell 49 form an annular chamber 51, and the annular chamber 51 is directly communicated with the gas pump connecting port 55.

[0074] The gas pump is connected with an external inert gas storage tank, and inert gas is introduced into the annular chamber 51 through the gas pump connecting port 55.

[0075] The outer wall of the first pipeline 5 is arrayed with a plurality of rows of ventilation holes 52, and a plurality of baffle plates 53 are rotatably connected to the outer wall of the first pipeline 5. The baffle plates 53 are located in the annular chamber 51 and are located in the rotation path of the ventilation holes 52, and the length of the baffle plates 53 is matched with the length of the first pipeline 5. All the baffle plates 53 are integrated into one whole body through the connecting piece 54, and the connecting piece 54 is provided with a linear drive device. Through the action of the linear drive device, all the baffle plates 53 can be driven to rotate synchronously, so as to cover or expose the ventilation holes 52, and control the on-off of the air duct.

[0076] The inert gas in the annular chamber 51 is introduced into the inside of the first pipeline 5 through the ventilation holes 52, and when it is not needed to ventilate the first pipeline 5, the connecting piece 54 and the baffle plate 53 are driven to rotate through the linear drive, and when all the ventilation holes 52 are blocked by the baffle plate 53, the gas pump stops ventilating the annular chamber 51.

[0077] The piston block 10 is sealingly arranged in the first pipe 5, and a through opening 38 is formed in the side wall of the piston block 10. A rectangular slot 39 is horizontally formed in the wall of the through opening 38, and a baffle plate 40 is sealingly arranged in the rectangular slot 39. Two springs 41 are fixed between the rectangular slot 39 and the baffle plate 40, and the reset function is realized through the springs 41. A limiting slot 43 is vertically formed in the inner wall of the first pipe 5, and a limiting block 44 is fixedly arranged on the side wall of the piston block 10 and sealingly arranged in the limiting slot 43, so as to prevent the piston block 10 from rotating.

[0078] A pressing block 48 is fixedly arranged on the inner wall of the first pipe 5 and located directly below the baffle plate 40, and the longitudinal section of the pressing block 48 is an isosceles triangle. A liquid through hole 42 is formed in the center of the end face of the piston block 10, and a liquid through pipe 56 is fixedly arranged below the liquid through hole 42 and contacts the inner wall of the first pipe 5 and is away from the baffle plate 40. A liquid outlet 57 is formed in the first pipe 5 and located below the pressing block 48 and in the sliding path of the liquid through pipe 56.

[0079] When the piston block 10 is slid downward, the baffle plate 40 is in contact with the pressing block 48 and slides to the deep part of the rectangular slot 39 under the interaction of the pressing block 48. The through opening 38 is opened, and the liquid above the piston block 10 flows to the lower part of the piston block 10 through the through opening 38, and the liquid outlet 57 is communicated with the liquid through pipe 56.

[0080] The piston block 10 is controlled to move vertically by a driving assembly. The driving assembly includes a telescopic cylinder 19 fixedly arranged on the top of the machine body 1, a circular block 20 fixedly arranged on the driving shaft of the telescopic cylinder 19, and a circular ring 22 fixedly arranged on the lower surface of the circular block 20 through two connecting rods 21.

[0081] A moving block 23 is sealingly arranged in the first pipe 5. An exhaust hole 37 is symmetrically formed in the end face of the moving block 23 based on the center of the moving block 23, and the exhaust hole 37 is used for exhausting the gas in the first pipe 5. An annular slot 24 is formed in the top of the moving block 23, and the circular ring 22 is rotatably arranged in the annular slot 24. A rotating hole is formed in the center of the end face of the moving block 23, and a rotating shaft 25 is vertically rotatably arranged in the rotating hole. The rotating shaft 25 is hollow and communicates with the outside at both ends. The bottom end of the rotating shaft 25 is fixedly arranged with the piston block 10 and communicates with the liquid through hole 42.

[0082] In the process of defoaming, the aluminum liquid in the first pipeline 5 above the piston block 10 is subjected to inert gas, which can gather with impurities and bubbles in the aluminum liquid and drive the impurities and bubbles to move upwards, and the gas can be discharged through the exhaust hole 37, and the impurities float on the surface of the aluminum liquid. In the process of defoaming, the circular block 20 is driven to move downwards by the telescopic air cylinder 19, the circular block 20 drives the circular ring 22 to move synchronously through the connecting rod 21, and the circular ring 22 drives the moving block 23 and the rotating shaft 25 to move.

[0083] An arc-shaped ring 60 is fixedly arranged on the inner wall of the first pipeline 5 above the piston block 10, and the arc-shaped ring 60 is in gap cooperation with the outer wall of the rotating shaft 25. A rotating groove 61 is formed through the inner wall and the outer wall of the arc-shaped ring 60, and a matching ring 59 is slidably connected in the rotating groove 61. The matching ring 59 has the same diameter as the arc-shaped ring 60. A linear drive two is arranged in the matching ring 59. Through the action of the linear drive two, the matching ring 59 and the arc-shaped ring 60 together form a complete circular sealing surface, thereby realizing the sealing of the first pipeline 5 and the separation of the aluminum liquid and the impurities.

[0084] A plurality of through-flow holes 58 are uniformly formed in the outer wall of the rotating shaft 25, and the through-flow holes 58 are located at the top of the rotating shaft 25 and are connected with the inside of the rotating shaft 25. The inside of the rotating shaft 25 is a hollow structure, the inner wall of which is provided with a thread, the bottom end is rotatably connected with the top of the piston block 10, and a threaded opening 46 is formed through the top end. The rotating shaft 25 is controlled to rotate by a threaded component, which includes a third threaded rod 45. The third threaded rod 45 is threadedly connected with the inner wall of the rotating shaft 25 through the threaded opening 46 and forms a seal. A fixed rod is fixedly installed at the top end of the third threaded rod 45, and one end of the fixed rod is fixedly connected with the inner wall of the machine body 1. When the circular ring 22 drives the moving block 23 and the rotating shaft 25 to move, the rotating shaft 25 and the third threaded rod 45 relatively displace, and through the cooperation of the third threaded rod 45 and the threaded opening 46, the rotating motion of the rotating shaft 25 can be realized.

[0085] When the arc-shaped ring 60 and the matching ring 59 are located below and adjacent to the through-flow holes 58, the aluminum liquid is sealed in the first pipeline 5 by the arc-shaped ring 60 and the matching ring 59, and the aluminum liquid with impurities is located above the arc-shaped ring 60 and the matching ring 59 at this time. Continue to move the circular block 20 downwards, when the through-flow holes 58 are located below the third threaded rod 45, the aluminum liquid with impurities enters the inside of the rotating shaft 25 through the through-flow holes 58, at this time, the baffle two 40 reaches the position of the abutting block 48, and the aluminum liquid in the inside of the rotating shaft 25 is discharged from the first pipeline 5 through the through-liquid hole 42, the through-liquid pipe 56 and the through-liquid opening two 57. The aluminum liquid with impurities can be collected by connecting a collecting device outside the first pipeline 5.

[0086] A defoaming assembly is arranged on the outer wall of the rotating shaft 25, and is used to eliminate the bubbles contained in the aluminum liquid sample in the first pipeline 5. The defoaming assembly comprises a spiral blade 36 fixedly installed on the outer wall of the rotating shaft 25, and a plurality of through holes 47 vertically arranged on the surface of the spiral blade 36 and distributed in a circular manner.

[0087] The through holes 47 fragmentize the flow path of the aluminum liquid sample, and the bubbles are torn into small bubbles when passing through the through holes 47 due to local shear force. The small bubbles are more likely to be dissolved and float up due to high surface energy. The aluminum liquid sample forms a jet flow and a vortex flow when flowing through the through holes 47, breaks the laminar flow state, and makes the flow field in the first pipeline 5 more uniform. The "flow field dead angle" originally close to the pipeline wall is disturbed and covered, and the risk of bubble escape is reduced.

[0088] The preparation mechanism 2 is fixedly communicated with the mounting shell 49 and the first pipeline 5 through a conveying pipe 34. The conveying pipe 34 is a one-way valve structure, and the flow direction is from the inside of the preparation mechanism 2 to the inside of the first pipeline 5. A flow control valve 35 is arranged on the conveying pipe 34. By adjusting the opening degree of the valve, the outflow of the aluminum liquid from the preparation mechanism 2 to the first pipeline 5 can be accurately controlled, so that the discharge demand of aluminum liquid with different flow rates can be realized.

[0089] As shown in Figures 4-7 The bottom end of the first pipeline 5 is fixedly installed with a second pipeline 11, the bottom end of the second pipeline 11 is fixedly installed with an atomizing nozzle 6, the bottom wall of the second pipeline 11 is symmetrically provided with a liquid passage one 7 in communication with the atomizing nozzle 6, a mounting hole is arranged at the center of the bottom of the second pipeline 11, a mounting frame 8 is fixedly installed in the mounting hole, a drop pipe 9 is fixedly installed at the bottom of the mounting frame 8, and the bottom end of the drop pipe 9 penetrates through the atomizing nozzle 6.

[0090] A mounting plate 12 is fixedly installed in the second pipeline 11, a rotating rod 13 is symmetrically and horizontally rotatably installed in the second pipeline 11, a partition plate 14 is rotatably sleeved on the rotating rod 13, and the surface of the second pipeline 11 is provided with a transmission component for controlling the relative rotation of the two partition plates 14. The transmission component comprises a first threaded rod 15 horizontally rotatably installed on the surface of the second pipeline 11, a sliding block 16 in the shape of T threadedly sleeved on the first threaded rod 15, and two second threaded rods 17 symmetrically and horizontally fixedly installed on the surface of the sliding block 16. The screw thread directions of the surfaces of the two second threaded rods 17 are opposite. One end of the rotating rod 13 penetrates through the second pipeline 11 and is provided with a threaded groove 18, and one end of each of the two second threaded rods 17 is threadedly installed in the two threaded grooves 18.

[0091] Firstly, the aluminum liquid sample is prepared by the preparation mechanism 2, when testing, firstly, the testing piece is fixed by the positioning mechanism 3, the fixed testing piece is located below the atomizing nozzle 6 and the dropping pipe 9, then according to the required simulation of the aluminum liquid sample discharging mode, if it is discharged in the dropping mode, the first threaded rod 15 is controlled to rotate, the sliding block 16 is controlled to move towards the second pipeline 11, since the second threaded rod 17 cannot rotate, the two rotating rods 13 are controlled to rotate relative to the two baffles 14 under the cooperation between the surface threads of the second threaded rod 17 and the threaded grooves 18, until the ends of the two baffles 14 away from the rotating rod 13 are respectively in contact with the two side walls in the second pipeline 11, at this time, the two baffles 14 are respectively located above the two liquid inlet openings 7, and the side walls are in close contact with the inner wall of the second pipeline 11, at this time, the aluminum liquid sample in the preparation mechanism 2 is introduced into the first pipeline 5 from the conveying pipe 34, the aluminum liquid sample flows into the second pipeline 11 under the action of its own gravity, and is blocked by the baffles 14, and does not enter the atomizing nozzle 6 from the liquid inlet opening 7, but flows along the inclined surface above the baffles 14 to the installation frame 8, and then naturally drops from the pipe opening of the dropping pipe 9 to the surface of the testing piece.

[0092] If it is discharged in the fine spraying mode, the first threaded rod 15 is controlled to rotate, the sliding block 16 is controlled to move away from the second pipeline 11, the two baffles 14 are controlled to rotate to be vertical in the second pipeline 11, the two ends of the baffles 14 are respectively in close contact with the surfaces of the installation frame 8 and the mounting plate 12, and the front and back surfaces of the baffles 14 are in close contact with the inner wall of the second pipeline 11, at this time, the blocking effect of the two baffles 14 on the two liquid inlet openings 7 is removed, at this time, the aluminum liquid sample in the preparation mechanism 2 is introduced into the first pipeline 5 from the conveying pipe 34, the aluminum liquid sample flows into the second pipeline 11 under the action of its own gravity, and is accumulated in the second pipeline 11, and cannot enter the closed space composed of the two baffles 14, the mounting plate 12 and the inner wall of the second pipeline 11, so it cannot enter the dropping pipe 9, at this time, the piston block 10 is controlled to move downwards, the aluminum liquid sample in the second pipeline 11 is extruded into the atomizing nozzle 6 from the two liquid inlet openings 7, and is sprayed from the multiple nozzles of the atomizing nozzle 6, and acts on the surface of the testing piece.

[0093] Meanwhile, the extension amount of the multiple telescopic air cylinders 19 can be controlled, the testing piece can be reciprocatingly inclined, the aluminum liquid sample in the testing piece can flow in the testing piece, the dynamic flow forms such as turbulent flow and vortex of the aluminum liquid in the molten pool can be simulated, and the erosion and wear of the testing piece are consistent with the actual working conditions.

[0094] As Figure 1As shown, the inner wall of the body 1 is provided with two mechanical arms 26, the driving ends of the two mechanical arms 26 are respectively fixedly installed with a high-speed camera 27 and an infrared thermal imager 28, the upper surface of the bearing table 31 is provided with a plurality of temperature sensors 29, and the side wall of the body 1 is fixedly installed with an image analysis processing unit 30.

[0095] The two mechanical arms 26 can adjust the high-speed camera 27 and the infrared thermal imager 28 in multiple angles and multiple directions, the high-speed camera 27 can be located around the detection area during testing, can capture dynamic pictures in the process of the molten aluminum contacting the detection piece in real time, including the splashing condition of the molten aluminum, the infrared thermal imager 28 can monitor the temperature of the surface of the detection piece in the whole region, and the temperature distribution change of the molten aluminum and the detection piece in the contact moment and the long-term erosion process is intuitively presented by a temperature cloud chart, the solid-liquid interface position and the erosion range are accurately positioned, the internal heat conduction process of the detection piece can be analyzed based on the collected temperature data, the heat flow density is calculated, the thermal stress distribution is evaluated combined with the temperature gradient change, the cracking, peeling and other damage risks caused by the thermal stress are predicted, the temperature sensors 29 are installed on the surface and around the detection piece, and are used for monitoring the temperature change of the detection piece in the molten aluminum erosion process in real time, so as to reflect the solid-liquid interface reaction condition, the image analysis processing unit 30 is connected with the high-speed camera 27, the infrared thermal imager 28 and the temperature sensors 29, analyzes and processes the collected images and temperature data, evaluates the instantaneous thermal shock damage and the long-term contact erosion behavior of the detection piece through image recognition and data analysis algorithm, and generates a corresponding test report, wherein the mechanical arms 26, the image analysis processing unit 30, the high-speed camera 27, the infrared thermal imager 28 and the temperature sensors 29 are disclosed in a Chinese patent with the patent name of an automatic inspection robot for poultry breeding with an alarm function and the patent name of a cable tunnel intelligent inspection robot, which belong to the prior art, and the working principle thereof will not be described in detail here.

[0096] In the initial state, i.e. before the molten aluminum sample in the preparation mechanism 2 is fed from the delivery pipe 34 into the first pipe 5, the moving block 23 and the piston block 10 are at the highest position, and the connecting port of the delivery pipe 34 and the first pipe 5 is between the moving block 23 and the piston block 10. Then, according to the desired simulation of the way the molten aluminum sample is discharged, the two partitions 14 are controlled to rotate, and after the adjustment is completed, the molten aluminum sample in the preparation mechanism 2 is fed from the delivery pipe 34 into the first pipe 5. The molten aluminum sample fed into the first pipe 5 is between the moving block 23 and the piston block 10. The feeding is completed when the molten aluminum sample in the first pipe 5 just reaches the through-flow hole 58. After the feeding is completed, the telescopic air cylinder 19 is started again to control the moving block 23 and the piston block 10 to move downward with the molten aluminum sample between them. In the process of moving downward, the rotating shaft 25 also moves downward. Since the third threaded rod 45 is fixed, the rotating shaft 25 rotates with the moving block 23 and the helical blade 36 due to the cooperation between the surface threads of the third threaded rod 45 and the threaded ports 46. When the helical blade 36 rotates, it forms a local shear flow for the molten aluminum sample. The bubbles in the molten aluminum sample are torn into small bubbles by the shear force of the edge of the helical blade 36. The small bubbles are more easily dissolved and float up due to the high surface energy. The helical blade 36 rotates to make the molten aluminum sample do a circular motion, generating a centrifugal force. The bubbles and inert gases gather to the center of rotation of the helical blade 36 due to the low density, and then float up to be discharged at the exhaust hole 37. The helical blade 36 breaks the laminar flow state of the molten aluminum sample to form a turbulent disturbance. The bubbles are “tossed” to the surface by the turbulent flow, accelerating the escape of the gas. At the same time, the turbulent flow promotes the material transfer process between the bubbles and the molten aluminum sample.

[0097] In the process of vertical movement of the moving block 23 and the piston block 10, the piston block 10 does not rotate due to the restriction of the limiting block 44 and the limiting groove 43, and with the vertical movement of the moving block 23 and the piston block 10, when the baffle plate two 40 moves downward to the lower surface thereof in contact with the upper surface of the pressing block 48, the baffle plate two 40 moves into the rectangular groove 39 under the action of the force pressed by the inclined surface, and the spring 41 is contracted, at this time, the end of the baffle plate two 40 away from the spring 41 is no longer in contact with the first pipeline 5, so that the aluminum liquid sample after defoaming flows out from the through port 38 and enters the second pipeline 11, if the aluminum liquid sample is discharged in the form of dripping, the piston block 10 does not need to be controlled to move, so that the aluminum liquid sample in the second pipeline 11 can naturally drip from the pipe opening of the dripping pipe 9, and if the aluminum liquid sample is discharged in the form of fine spraying, the piston block 10 needs to be controlled to continue to move downward until the baffle plate two 40 moves downward to be no longer in contact with the pressing block 48, at this time, the pressing force of the pressing block 48 on the baffle plate two 40 disappears, and the baffle plate two 40 quickly moves back to the original position under the elastic potential energy of the spring 41, the side wall of the baffle plate two 40 after moving back and the end of the baffle plate two 40 away from the spring 41 are again in close contact with the inner wall of the first pipeline 5, so that the first pipeline 5 is sealed, at this time, with the downward movement of the piston block 10, the aluminum liquid sample in the second pipeline 11 is squeezed into the two liquid through ports one 7 and sprayed from the multiple spray holes of the atomizing nozzle 6 in the form of atomization, and when the discharge is completed, the moving block 23 and the piston block 10 are controlled to move upward to the highest position, in the process, the upper surface of the baffle plate two 40 is in contact with the lower surface of the pressing block 48 and moves into the rectangular groove 39 under the pressing action until the baffle plate two 40 is no longer in contact with the pressing block 48 and then quickly moves back to the original position.

[0098] The aluminum liquid sample in the first pipeline 5 is defoamed before being discharged into the second pipeline 11, and the defoaming and discharging are performed in two steps, so that the defoaming is completely performed.

[0099] At the same time, in the process of defoaming, the piston block 10 moves downward, at this time, the baffle plate two 40 does not move downward to be in contact with the pressing block 48, so that the piston block 10 can push the gas below the piston block 10 to be sprayed from the dripping pipe 9 or the spray hole of the atomizing nozzle 6, the aluminum liquid sample remaining in the dripping pipe 9 or the spray hole during the previous discharge of the aluminum liquid sample is pushed out, so that the dripping pipe 9 or the spray hole can be pre-cleaned before the discharge of the aluminum liquid sample, so that the aluminum liquid sample remaining in the dripping pipe 9 or the spray hole does not affect the subsequent discharge of the aluminum liquid sample, and the accuracy of the test result is ensured.

[0100] In the present application, the flow control valve 35 can simulate different flow rates, and the two baffles 14 are controlled to rotate relatively through the transmission component, so that the aluminum liquid sample can be discharged in the form of dripping or fine spraying, only one set of liquid discharging structure can quickly switch the discharging mode of the aluminum liquid sample, and the practicability of the device is improved.

[0101] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent substitutions or changes according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A molten aluminium erosion performance testing apparatus comprising a housing (1), characterised in that, The machine body (1) is internally provided with: A preparation mechanism (2) for preparing aluminum liquid sample; A positioning mechanism (3) for fixing the to-be-detected member; A first pipeline (5) with its inlet communicated with the outlet of the preparation mechanism (2) through a conveying pipe (34); A second pipeline (11) communicated with the outlet of the first pipeline (5); At least one atomizing nozzle (6) arranged on the side wall of the second pipeline (11) and communicated with the inside of the second pipeline (11) through a liquid inlet (7); A mounting frame (8) arranged at the bottom of the second pipeline (11), the bottom of the mounting frame (8) is connected with a dropping pipe (9); Two partitions (14) arranged in the inside of the second pipeline (11) and relatively rotatable, for selectively blocking the liquid inlet (7) or the inlet of the mounting frame (8) to switch the discharge of the aluminum liquid sample from the atomizing nozzle (6) or the dropping pipe (9); A transmission component for driving the relative rotation of the two partitions (14); A piston block (10) movably arranged in the inside of the second pipeline (11) for extruding the aluminum liquid sample from the liquid inlet (7) into the atomizing nozzle (6); and A driving assembly for driving the movement of the piston block (10) in the second pipeline (11); Wherein, the positioning mechanism (3) is located below the atomizing nozzle (6) and the dropping pipe (9); The first pipeline (5) is internally provided with a defoaming assembly for eliminating the bubbles in the aluminum liquid sample, the defoaming assembly comprises: A moving block (23) movably and rotatably arranged in the first pipeline (5); A spiral blade (36) fixedly installed on the outer periphery of the moving block (23); A rotating shaft (25) coaxially fixedly connected with the moving block (23); A third threaded rod (45) fixedly arranged, penetrating through the rotating shaft (25) and threadedly matched with a threaded opening (46) formed on the rotating shaft (25) to drive the rotation of the moving block (23) and the spiral blade (36) when the moving block (23) moves up and down; An exhaust hole (37) formed on the top of the moving block (23) for exhausting the bubbles; A driving member for driving the up-and-down movement of the moving block (23) in the first pipeline (5); The exhaust hole (37) penetrates through the top of the moving block (23) and is communicated with the inside of the first pipeline (5); The piston block (10) is connected below the moving block (23), a rectangular groove (39) is formed on the bottom of the moving block (23), a baffle two (40) is elastically installed in the rectangular groove (39) through a spring (41), and a pressing block (48) matched with the baffle two (40) is arranged on the inner wall of the first pipeline (5), when the moving block (23) drives the piston block (10) to move downward to the position where the baffle two (40) contacts with the pressing block (48), the baffle two (40) compresses the spring (41) and retreats into the rectangular groove (39), so that the aluminum liquid sample flows from below the moving block (23) into the second pipeline (11).

2. The molten aluminum erosion performance testing device according to claim 1, characterized in that, The transmission component comprises: Two rotating rods (13), one end of each is fixedly connected with two said baffles (14), the other end penetrates out of said second pipeline (11) and is provided with a threaded groove (18); Two second threaded rods (17), one end of each is threadedly installed in two said threaded grooves (18); A sliding block (16), connected with the other end of two said second threaded rods (17), said sliding block (16) cannot rotate; A first threaded rod (15), threadedly connected with said sliding block (16), used for driving said sliding block (16) to move with said second threaded rods (17), and then driving said rotating rods (13) to rotate through the thread cooperation of said threaded grooves (18) and said second threaded rods (17).

3. The molten aluminum erosion performance testing device of claim 2, wherein, Said positioning mechanism (3) comprises a bearing table (31) and a plurality of telescopic cylinders (19), said bearing table (31) is used for placing a piece to be detected, the driving end of each said telescopic cylinder (19) is connected with the bottom of said bearing table (31), used for adjusting the inclination angle of said bearing table (31).

4. The molten aluminum erosion performance testing device of claim 3, wherein Said machine body (1) is further provided with: At least one mechanical arm (26), the driving end of which is installed with a high-speed camera (27) and / or an infrared thermal imager (28); A plurality of temperature sensors (29), arranged on the upper surface of the bearing table (31) of said positioning mechanism (3); An image analysis processing unit (30), electrically connected with said high-speed camera (27), infrared thermal imager (28) and temperature sensor (29) respectively; Said conveying pipe (34) is provided with a flow control valve (35), and said positioning mechanism (3) further comprises a clamping assembly for fixing the piece to be detected.

5. A molten aluminum erosion performance test method using the molten aluminum erosion performance test device according to any one of claims 1 to 4, characterized by, Comprise the following steps: S1: preparing an aluminum liquid sample through said preparation mechanism (2), and positioning the piece to be detected through said positioning mechanism (3); S2: according to the required aluminum liquid sample discharge mode, controlling the relative rotation of two said baffles (14) through said transmission component, so as to switch the discharge of the aluminum liquid sample from said atomizing nozzle (6) or said dropping pipe (9); S3: conveying the aluminum liquid sample in said preparation mechanism (2) to said first pipeline (5) through said conveying pipe (34); S4: after the aluminum liquid sample flows into said second pipeline (11) from said first pipeline (5), if it is a dripping mode, the aluminum liquid sample naturally drips from said dropping pipe (9) to the surface of the piece to be detected; if it is a refining spraying mode, the piston block (10) is driven to move downward through said driving assembly, the aluminum liquid sample is squeezed from said liquid inlet one (7) into said atomizing nozzle (6) and sprayed to the surface of the piece to be detected.

6. The method of claim 5, wherein, In step S3, the aluminum liquid sample in said first pipeline (5) is subjected to bubble elimination treatment through said defoaming assembly; Before or during step S3, the residual gas or aluminum liquid in said first pipeline (5) and second pipeline (11) is sprayed from said dropping pipe (9) or atomizing nozzle (6) by driving said piston block (10) to move downward, so as to perform pre-cleaning.

7. The method of claim 6, wherein, In step S4, the piece to be detected is reciprocatingly inclined by controlling the telescopic amount of the telescopic cylinder (19) of said positioning mechanism (3); In step S4, the dynamic picture of the contact between the molten aluminum and the piece to be detected is captured by a high-speed camera (27), the surface temperature of the piece to be detected is monitored by an infrared thermal imager (28) and a temperature sensor (29), and the collected data is analyzed and processed by an image analysis processing unit (30).

Images