Wind and sand erosion experimental device and its use method

Abstract

The present invention discloses a wind and sand erosion test device and a method for using the same, and relates to the field of sandblasting test technology, and the main purpose is to make the erosion angle of the sample to be tested adjustable. The main technical scheme of the present invention is: the wind and sand erosion test device, comprising: a partition is horizontally installed in the shell, which is used to separate the shell into an upper shell and a lower shell, and the partition is evenly distributed with a plurality of sand leakage holes; a sandblasting gun is fixedly installed in the upper shell, the inlet of the sandblasting gun is connected to the compressed air mechanism, and the outlet of the sandblasting gun is vertically downward; the base is placed on the upper surface of the partition, the support rod and the positioning rod are respectively fixedly connected to the upper surface of the base, one end of the sample plate is fixedly connected to the pivot, and the pivot is rotatably connected to the support rod, and the opposite sides of the sample plate are respectively arranged with a plurality of first positioning holes in sequence, and the positioning rod is arranged with a plurality of second positioning holes in sequence, and the distance between each first positioning hole and the pivot is equal to the distance between one of the second positioning holes and the pivot.

Description

Technical Field

[0001] The invention relates to the technical field of sandblasting experiments, and in particular to a wind and sand erosion experiment device and a use method thereof. Background Art

[0002] Erosion refers to the wear caused by the impact of loose small particles of fluid or solid on the surface of the material at a certain speed and angle. Its essence is a type of wear damage caused by the impact of multiphase flow medium on the surface of the material. Erosion is a common failure behavior of materials in industrial production. It is widely present in many industrial sectors such as machinery, metallurgy, energy, building materials, transportation, aviation, aerospace and military industry, and has become an important cause of equipment failure or material damage. Northwest my country is a high-incidence area of ​​sandstorms. The strong wind and sand environment will cause serious erosion and wear on the materials, which directly affects the service life of the materials. Therefore, in-depth research on the erosion mechanism and failure behavior of different materials in wind and sand environments and mastering the laws of wind and sand erosion have become issues that need to be urgently solved. Experimental research is a very important research method in the study of wind and sand erosion and wear. Improving the wind and sand erosion resistance of materials requires better and more practical experimental equipment. Summary of the invention

[0003] In view of this, the present invention provides a wind-sand erosion experimental device, the main purpose of which is to make the erosion angle of the sample to be tested adjustable.

[0004] In order to achieve the above object, the present invention mainly provides the following technical solutions:

[0005] In one aspect, the present invention provides a wind-sand erosion experimental device, which includes: a housing, a sandblasting gun, and a sample rack;

[0006] A partition is horizontally installed in the shell to separate the shell into an upper shell and a lower shell, and the partition is evenly distributed with a plurality of sand leakage holes;

[0007] The sandblasting gun is fixedly installed in the upper housing, the inlet of the sandblasting gun is connected to the compressed air mechanism, and the outlet of the sandblasting gun is vertically downward, and is used to vertically spray sand-containing air downward;

[0008] The sample rack includes a base, a sample plate, a support rod and a positioning rod. The base is placed on the upper surface of the partition, the support rod and the positioning rod are respectively fixedly connected to the upper surface of the base, one end of the sample plate is fixedly connected to a pivot, and the pivot is rotatably connected to the support rod. The opposite sides of the sample plate are respectively arranged with a plurality of first positioning holes in sequence, and the positioning rod is arranged with a plurality of second positioning holes in sequence, and the distance between each of the first positioning holes and the pivot is equal to the distance between one of the second positioning holes and the pivot.

[0009] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0010] Optionally, it further comprises a plurality of fixing rods, which are evenly arranged on the lower surface of the base, and each of the fixing rods is inserted into one of the sand leakage holes to fix the relative position of the base and the partition.

[0011] Optionally, it also includes multiple limiting screws, and the opposite sides of the upper surface of the sample plate are respectively provided with sliding grooves for accommodating the opposite sides of the sample. The side walls of the sliding grooves are sequentially arranged with multiple threaded holes, and each of the limiting screws is threadedly connected to one of the threaded holes for tightening the opposite sides of the sample.

[0012] Optionally, the partition is detachably connected to the shell.

[0013] Optionally, it also includes an air heater and an air filter, and the compressed air mechanism, the air heater, the air filter and the sandblasting gun are connected in sequence.

[0014] Optionally, a camera mechanism is further included. An observation window is installed on the side wall of the upper shell. The camera mechanism is installed on the outer side of the observation window to detect the injection speed of the sand-containing air.

[0015] Optionally, it also includes a sand material recovery bin, a deflector tube row, an exhaust mechanism, a compressed air pipe and a sand material delivery pipe, wherein one end of the deflector tube row is connected to the lower end of the lower shell body, and the other end is connected to the exhaust mechanism, the deflector tube row includes a plurality of straight tubes and a plurality of U-shaped tubes, the plurality of straight tubes and the plurality of U-shaped tubes are alternately connected, each of the straight tubes extends in a vertical direction, and the plurality of straight tubes are arranged in sequence in a horizontal direction, wherein the U-shaped tube located at the lower end of the straight tube is a first U-shaped tube, and the U-shaped tube located at the upper end of the straight tube is a second U-shaped tube, the lower end of the tube wall of the first U-shaped tube is connected to the upper end of the sand material recovery bin through a recovery pipe, one end of the compressed air pipe is connected to the compressed air mechanism, and the other end is connected to the inlet of the sandblasting gun, and one end of the sand material delivery pipe is connected to the lower end of the sand material recovery bin, and the other end is connected to the inlet of the sandblasting gun.

[0016] Optionally, a bag dust removal mechanism is further included, wherein the inlet of the bag dust removal mechanism is connected to the other end of the deflector tube row, and the outlet of the bag dust removal mechanism is connected to the exhaust mechanism.

[0017] On the other hand, the present invention also provides a method for using the wind and sand erosion experimental device, comprising the following steps:

[0018] (1) placing the base on a table, pushing the sample plate to rotate around the pivot so that one of the first positioning holes corresponds to one of the second positioning holes, and inserting a positioning pin into the second positioning hole and the first positioning hole in sequence to fix the relative angle between the sample plate and the base;

[0019] (2) fixing the sample to be eroded on the upper surface of the sample plate;

[0020] (3) opening the door of the upper shell, moving the sample rack into the upper shell so that the base is in contact with the partition directly below the sandblasting gun, and closing the door of the upper shell;

[0021] (4) Starting the compressed air mechanism to allow the sandblasting gun to spray sand-containing gas.

[0022] By means of the above technical solution, the present invention has at least the following advantages:

[0023] The sample to be subjected to the wind and sand erosion experiment is fixed on the upper surface of the sample plate, and the sample plate is rotated around the pivot so that one of the first positioning holes corresponds to one of the second positioning holes (because the distance between each of the first positioning holes and the pivot is equal to the distance between one of the second positioning holes and the pivot, so the center of the circle where one of the first positioning holes and one of the second positioning holes are located coincides with the central axis of the pivot), so as to facilitate inserting the positioning pins into the corresponding second positioning holes and the first positioning holes in sequence to stabilize the relative angle between the sample plate and the base, and then open the door of the upper shell, fit the base to the upper surface of the partition, thereby stabilizing the relative angle between the sample plate and the partition, and close the door of the upper shell. Start the compressed air mechanism, and the sand-containing gas is ejected vertically downward from the outlet of the sandblasting gun, and the sand-containing gas is ejected to the sample surface at a certain angle, and the sand particles in the gas settle into the lower shell through multiple sand leakage holes. Because the partition is placed horizontally, the outlet of the sandblasting gun is vertically downward, the angle between the flow direction of the sand-containing gas and the sample surface is the first angle, the relative angle between the sample plate (sample) and the base is the second angle, and the sum of the first angle and the second angle is equal to 90°, so the first angle can be changed by changing the second angle, and the second angle can be changed by making different first positioning holes correspond to different second positioning holes and inserting positioning pins, thereby achieving the purpose of changing the erosion angle of the sample to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic structural diagram of a wind and sand erosion experimental device provided by an embodiment of the present invention;

[0025] Figure 2 A cross-sectional view of a housing provided by an embodiment of the present invention;

[0026] Figure 3 for Figure 2 The structural diagram of part A in the figure;

[0027] Figure 4 is an isometric view of the sample holder;

[0028] Figure 5 is a top view of the sample holder;

[0029] Figure 6 is an isometric view of the sample plate;

[0030] Figure 7 A side view of the sample holder.

[0031] The figure marks in the drawings of the specification include: shell 1, sandblasting gun 2, partition 3, sand leakage hole 4, base 5, sample plate 6, support rod 7, positioning rod 8, first positioning hole 9, second positioning hole 10, pivot 11, positioning pin 12, fixed rod body 13, limit screw 14, slide groove 15, threaded hole 16, support body 17, air heater 18, air filter 19, compressed air mechanism 20, observation window 23, camera mechanism 24, high-speed camera 241, light source 242, sand material recovery bin 25, baffle pipe row 26, exhaust mechanism 27, compressed air pipe 28, sand material conveying pipe 29, straight pipe 261, first U-shaped pipe 262, second U-shaped pipe 263, recovery pipe 30, bag dust removal mechanism 31. DETAILED DESCRIPTION

[0032] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, on the one hand, an embodiment of the present invention provides a wind and sand erosion experimental device, which includes: a housing 1, a sandblasting gun 2 and a sample rack;

[0035] A partition plate 3 is horizontally installed in the shell 1, which is used to separate the shell 1 into an upper shell and a lower shell, and the partition plate 3 is evenly distributed with a plurality of sand leakage holes 4;

[0036] The sandblasting gun 2 is fixedly installed in the upper housing, the inlet of the sandblasting gun 2 is connected to the compressed air mechanism 20, and the outlet of the sandblasting gun 2 is vertically downward, for vertically spraying sand-containing air downward;

[0037] The sample rack includes a base 5, a sample plate 6, a support rod 7 and a positioning rod 8. The base 5 is placed on the upper surface of the partition 3. The support rod 7 and the positioning rod 8 are respectively fixedly connected to the upper surface of the base 5. One end of the sample plate 6 is fixedly connected to a pivot 11. The pivot 11 is rotatably connected to the support rod 7. The opposite sides of the sample plate 6 are respectively arranged with a plurality of first positioning holes 9 in sequence. The positioning rod 8 is arranged with a plurality of second positioning holes 10 in sequence. The distance between each of the first positioning holes 9 and the pivot 11 is equal to the distance between one of the second positioning holes 10 and the pivot 11.

[0038] The working process of the wind and sand erosion experimental device is as follows:

[0039] The sample to be subjected to the wind and sand erosion test is fixed on the upper surface of the sample plate 6, and the sample plate 6 is rotated around the pivot 11 so that one of the first positioning holes 9 corresponds to one of the second positioning holes 10, so as to facilitate the insertion of the positioning pin 12 into the corresponding second positioning holes 10 and the first positioning holes 9 in sequence, so as to stabilize the relative angle between the sample plate 6 and the base 5, and then the door of the upper shell is opened, and the base 5 is placed on the upper surface of the partition 3 directly below the sandblasting gun 2, so as to stabilize the relative angle between the sample plate 6 and the partition 3, and the door of the upper shell is closed. The compressed air mechanism 20 is started, and the sand-containing gas is ejected vertically downward from the outlet of the sandblasting gun 2, and the sand-containing gas is ejected to the sample surface at a certain angle, and the sand particles in the gas are settled into the lower shell through multiple sand leakage holes 4. Because the partition 3 is placed horizontally, the outlet of the sandblasting gun 2 is vertically downward, the angle between the flow direction of the sand-containing gas and the sample surface is the first angle, the relative angle between the sample plate 6 (sample) and the base 5 is the second angle, and the sum of the first angle and the second angle is equal to 90°, so the first angle can be changed by changing the second angle, and the second angle can be changed by making different first positioning holes 9 correspond to different second positioning holes 10 and inserting the positioning pin 12, thereby achieving the purpose of changing the erosion angle of the sample to be tested.

[0040] In the technical solution of the present invention, the relative angle between the sample plate 6 and the base 5 is manually adjusted and fixed, thereby adjusting the erosion angle of the sample to be tested.

[0041] Specifically, a door is provided on the side wall of the upper shell to facilitate taking and placing the sample rack, wherein the area of ​​the base 5 is smaller than the area of ​​the partition 3 to avoid the base 5 covering all the sand leakage holes 4 so that the ejected sand particles can pass through the sand leakage holes 4 smoothly.

[0042] Specifically, the sample holder is located directly below the sandblasting gun 2 so that the sample can be eroded by the sand-containing gas.

[0043] Specifically, the first positioning hole 9 or the second positioning hole 10 is a threaded hole 16, which is convenient for threading the positioning pin 12, thereby preventing the positioning pin 12 from falling off and improving the stability of the overall structure of the sample rack.

[0044] Specifically, the sample rack is made of aluminum alloy as a whole.

[0045] Specifically, a plurality of sand leakage holes 4 are arranged in a matrix on the partition plate 3 .

[0046] Specifically, the support rods 7 and the positioning rods 8 are respectively vertically arranged above the base 5 , there are two support rods 7 , and the two support rods 7 are respectively located on opposite sides of the sample plate 6 , and there are two positioning rods 8 , and the two positioning rods 8 are respectively located on opposite sides of the sample plate 6 .

[0047] like Figure 7 As shown, in a specific embodiment, it also includes a plurality of fixed rods 13, and the plurality of fixed rods 13 are evenly arranged on the lower surface of the base 5, and each of the fixed rods 13 is inserted into one of the sand leakage holes 4 to fix the relative positions of the base 5 and the partition 3.

[0048] Specifically, if the rod body 13 is not fixed, when the sample erosion experiment is carried out, there is an inclination angle between the sample plate 6 and the base 5, and the sand-containing gas erodes to the upper surface of the inclined sample plate 6. The vertically downward sand-containing airflow will produce a horizontal driving force on the sample rack as a whole, and the sample rack will be horizontally displaced. The position of the area on the sample surface that is eroded by the sand-containing airflow will change, and the erosion effect of the sample surface in the natural environment will be simulated inaccurately.

[0049] In this embodiment, specifically, each of the fixing rods 13 is inserted into one of the sand leakage holes 4 to limit the horizontal displacement of the base 5 on the partition 3, thereby ensuring that the position of the area on the sample surface that is eroded by the sand-containing airflow remains stable.

[0050] like Figure 6 As shown, in a specific embodiment, it also includes a plurality of limit screws 14, and slide grooves 15 are respectively provided on opposite sides of the upper surface of the sample plate 6 for accommodating opposite sides of the sample, and the side walls of the slide grooves 15 are sequentially arranged with a plurality of threaded holes 16, and each of the limit screws 14 is threadedly connected to one of the threaded holes 16 for tightening the opposite sides of the sample.

[0051] In this embodiment, specifically, the sample is spread on the upper surface of the sample plate 6, and the length of the relative side of the sample accommodated in the slide groove 15 is determined according to the length of the sample, and then the limit screw 14 is screwed into the threaded hole 16 so that the head of the limit screw 14 is pressed against the relative side of the sample, thereby achieving the purpose of fixing the sample on the upper surface of the sample plate 6.

[0052] like Figure 1 and Figure 2 As shown, in a specific embodiment, the partition 3 is detachably connected to the shell 1.

[0053] In this embodiment, specifically, a support body 17 is horizontally provided on the inner side wall of the shell 1, which is used to abut against the edge of the lower surface of the partition 3, so that the partition 3 is horizontally placed in the shell 1. When it is necessary to clean the sand and granular materials deposited in the lower shell, the door of the upper shell is opened, and the partition 3 is taken out to dig out the sand and granular materials in the lower shell.

[0054] like Figure 1 As shown, in a specific embodiment, an air heater 18 and an air filter 19 are also included, and the compressed air mechanism 20, the air heater 18, the air filter 19 and the sandblasting gun 2 are connected in sequence.

[0055] In the present embodiment, specifically, the compressed air generated by the compressed air mechanism 20 is heated by the air heater 18 to simulate the temperature of the external ambient air flow. The model of the air filter 19 is AFR-2000. The air filter 19 filters out moisture in the compressed air to simulate the dry environment in northwest my country. In this way, the sand-containing air ejected from the sandblasting gun 2 has the characteristics of high temperature and dryness, which better simulates the situation of wind and sand erosion samples in northwest my country.

[0056] Specifically, it also includes a first controller and a second controller. The first controller is connected to the compressed air mechanism 20 and is used to control the airflow pressure of the compressed air. The outlet pipe of the air heater 18 is provided with a temperature sensor, and the temperature sensor is connected to the input end of the second controller. The output end of the second controller is connected to the air heater 18 for feedback control of the airflow temperature of the compressed air.

[0057] like Figure 2 As shown, in a specific embodiment, a camera mechanism 24 is further included. An observation window 23 is installed on the side wall of the upper shell. The camera mechanism 24 is installed on the outer side of the observation window to detect the injection speed of the sand-containing air.

[0058] In the present embodiment, specifically, tempered glass is installed at the observation window 23 to keep the internal environment of the shell 1 closed and prevent the sand-containing gas from flowing out of the shell 1 through the observation window 23; the camera mechanism 24 includes a third controller, a high-speed camera 241 and a light source 242, the high-speed camera 241 is equipped with an 8mm lens and a 50mm lens, the 8mm lens and the 50mm lens are respectively directed toward the sample rack through the observation window 23, the light source 242 includes a spotlight and a diffuser, the diffuser and the spotlight are respectively directed toward the sample rack through the observation window 23, the third controller is connected to the high-speed camera 241, and is used to control the high-speed camera 241 to shoot the situation of sand-containing gas eroding the sample surface, and the output end of the third controller is connected to the light source 242, and is used to control the switching of the spotlight and the diffuser.

[0059] like Figure 1 As shown, in a specific embodiment, it also includes a sand recovery bin 25, a baffle tube row 26, an exhaust mechanism 27, a compressed air pipe 28 and a sand delivery pipe 29, one end of the baffle tube row 26 is connected to the lower end of the lower shell, and the other end is connected to the exhaust mechanism 27, the baffle tube row 26 includes a plurality of straight tubes 261 and a plurality of U-shaped tubes, the plurality of straight tubes 261 and the plurality of U-shaped tubes are alternately connected, each of the straight tubes 261 extends in the vertical direction, and the plurality of straight tubes 261 are arranged in sequence in the horizontal direction. The U-shaped tube at the lower end of the straight tube 261 is a first U-shaped tube, and the U-shaped tube at the upper end of the straight tube 261 is a second U-shaped tube. The lower end of the tube wall of the first U-shaped tube is connected to the upper end of the sand recovery bin 25 through the recovery pipe 30. One end of the compressed air pipe 28 is connected to the compressed air mechanism 20, and the other end is connected to the inlet of the sandblasting gun 2. One end of the sand conveying pipe 29 is connected to the lower end of the sand recovery bin 25, and the other end is connected to the inlet of the sandblasting gun 2.

[0060] In this embodiment, specifically, firstly, sand is filled in the sand recovery bin 25. The compressed air mechanism 20 and the air extraction mechanism 27 are started, and the compressed air generated by the compressed air mechanism 20 reaches the sandblasting gun 2 through the compressed air pipe 28. At the same time, the sand in the sand recovery bin 25 flows to the sandblasting gun 2 through the sand delivery pipe 29. The sand and the compressed air converge into sand-containing air in the sandblasting gun 2 and are sprayed onto the surface of the sample. After the sand-containing air impacts the sample, it passes through a plurality of sand leakage holes 4. Because the lower end of the lower shell is connected to the air extraction mechanism 27 through the baffle pipe row 26, the lower end of the lower shell is generated in the baffle pipe row 26. The air flow flows from the upper end to the exhaust mechanism 27, and the sand particles in the lower shell are alternately deflected up and down in the deflection tube row 26 along with the air flow. Friction occurs between the sand particles and the inner side of the tube wall of the deflection tube row 26, and the kinetic energy of the sand particles is reduced. Therefore, when the sand particles flow through the multiple first U-shaped tubes in sequence, the sand particles with reduced kinetic energy are gradually deposited downward along the recovery tube 30 to the sand particle recovery bin 25, so that the sand particles circulate and impact the sample surface; at the same time, relatively pure air reaches the exhaust mechanism 27 through the other end of the deflection tube row 26 and is discharged to the outside.

[0061] Through this embodiment, the purpose of separating air and sand particles is achieved, and the sand particles are recycled and utilized at the same time.

[0062] like Figure 1 As shown, in a specific embodiment, a bag dust removal mechanism 31 is further included, the inlet of the bag dust removal mechanism 31 is connected to the other end of the baffle tube row 26 , and the outlet of the bag dust removal mechanism 31 is connected to the exhaust mechanism 27 .

[0063] In this embodiment, specifically, the air leaving the baffle tube array 26 passes through the bag dust removal mechanism 31 to further filter out sand particles in the air, so that the air discharged to the outside is cleaner.

[0064] On the other hand, another embodiment of the present invention further provides a method for using a wind and sand erosion experimental device, comprising the following steps:

[0065] (1) placing the base 5 on the table, pushing the sample plate 6 to rotate around the pivot 11 so that one of the first positioning holes 9 corresponds to one of the second positioning holes 10, so that the positioning pin 12 is inserted into the second positioning hole 10 and the first positioning hole 9 in sequence to fix the relative angle between the sample plate 6 and the base 5;

[0066] (2) Fixing the sample to be eroded onto the upper surface of the sample plate 6;

[0067] (3) opening the door of the upper shell, moving the sample rack into the upper shell so that the base 5 is in contact with the partition 3 directly below the sandblasting gun 2, and closing the door of the upper shell;

[0068] (4) The compressed air mechanism 20 is started to make the sandblasting gun 2 spray out the sand-containing gas to erode the sample.

[0069] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A wind and sand erosion experimental device, characterized in that: include: A shell, wherein a partition is horizontally installed in the shell, for separating the shell into an upper shell and a lower shell, and the partition is evenly distributed with a plurality of sand leakage holes; A sandblasting gun, wherein the sandblasting gun is fixedly installed in the upper housing, the inlet of the sandblasting gun is connected to the compressed air mechanism, and the outlet of the sandblasting gun is vertically downward, and is used for vertically spraying sand-containing air downward; A sample rack, the sample rack comprising a base, a sample plate, a support rod and a positioning rod, the base is placed on the upper surface of the partition, the support rod and the positioning rod are respectively fixedly connected to the upper surface of the base, one end of the sample plate is fixedly connected to a pivot, the pivot is rotatably connected to the support rod, the opposite sides of the sample plate are respectively arranged with a plurality of first positioning holes in sequence, the positioning rod is arranged with a plurality of second positioning holes in sequence, and the distance between each of the first positioning holes and the pivot is equal to the distance between one of the second positioning holes and the pivot; It also includes a plurality of fixing rods, which are evenly arranged on the lower surface of the base, and each of the fixing rods is plugged into one of the sand leakage holes to fix the relative position of the base and the partition; It also includes a plurality of limiting screws, and the opposite sides of the upper surface of the sample plate are respectively provided with slide grooves for accommodating the opposite sides of the sample, and the side walls of the slide grooves are sequentially arranged with a plurality of threaded holes, and each of the limiting screws is threadedly connected to one of the threaded holes for tightening the opposite sides of the sample; The blasting machine also includes a sand material recovery bin, a deflector tube row, an exhaust mechanism, a compressed air pipe and a sand material delivery pipe, wherein one end of the deflector tube row is connected to the lower end of the lower shell body, and the other end is connected to the exhaust mechanism, the deflector tube row includes a plurality of straight tubes and a plurality of U-shaped tubes, the plurality of straight tubes and the plurality of U-shaped tubes are alternately connected, each of the straight tubes extends in a vertical direction, and the plurality of straight tubes are arranged in sequence in a horizontal direction, wherein the U-shaped tube located at the lower end of the straight tube is a first U-shaped tube, and the U-shaped tube located at the upper end of the straight tube is a second U-shaped tube, the lower end of the tube wall of the first U-shaped tube is connected to the upper end of the sand material recovery bin through a recovery pipe, one end of the compressed air pipe is connected to the compressed air mechanism, and the other end is connected to the inlet of the sandblasting gun, and one end of the sand material delivery pipe is connected to the lower end of the sand material recovery bin, and the other end is connected to the inlet of the sandblasting gun.

2. The wind and sand erosion experimental device according to claim 1, characterized in that: The partition is detachably connected to the shell.

3. The wind and sand erosion experimental device according to claim 1, characterized in that: It also includes an air heater and an air filter, and the compressed air mechanism, the air heater, the air filter and the sandblasting gun are connected in sequence.

4. The wind and sand erosion experimental device according to claim 1, characterized in that: The utility model also comprises a camera mechanism. The side wall of the upper shell is provided with an observation window. The camera mechanism is installed on the outer side of the observation window and is used for detecting the injection speed of the sand-containing air.

5. The wind and sand erosion experimental device according to claim 1, characterized in that: It also includes a bag dust removal mechanism, the inlet of which is connected to the other end of the baffle tube row, and the outlet of which is connected to the air extraction mechanism.

6. A method for using the wind and sand erosion experimental device according to claim 1, characterized in that: The following steps are involved: (1) placing the base on a table, pushing the sample plate to rotate around the pivot so that one of the first positioning holes corresponds to one of the second positioning holes, and inserting a positioning pin into the second positioning hole and the first positioning hole in sequence to fix the relative angle between the sample plate and the base; (2) fixing the sample to be eroded on the upper surface of the sample plate; (3) opening the door of the upper shell, moving the sample rack into the upper shell so that the base is in contact with the partition directly below the sandblasting gun, and closing the door of the upper shell; (4) Starting the compressed air mechanism to allow the sandblasting gun to spray sand-containing gas.

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