Uniform-section tuyere sand amount uniformity regulation and control system of wind and sand environment simulation test device

Abstract

The invention discloses an equal-section tuyere sand amount uniformity regulation and control system of a wind and sand environment simulation test device, which comprises a sand supply device, an air duct and a regulation mechanism for regulating the wind and sand air volume, and is characterized in that the air duct comprises a flow collection cylinder, a first cylinder, a soft connection cylinder, a second cylinder, a conical cylinder and a diffusion cylinder which are arranged in sequence; the adjusting mechanism comprises a plurality of outer pipes arranged in an inner cavity of the diffusion barrel, an inlet of each outer pipe is communicated with the conical barrel, the outer pipes axially wrap the inner pipe, a strip-shaped seam is axially formed in the top of the inner pipe, and the strip-shaped seam is communicated with a sand supply opening of the sand supply device; a steel column is in clearance fit with an inner cavity of the inner pipe and connected with a driving mechanism. The tip of each outer pipe is provided with a slope facing the axis of the inner pipe, and the root of the slope is close to the front end of the inner pipe. According to the invention, the uniform regulation and control and the accurate regulation and control of the sand amount of the equal-section tuyere of the sandstorm environment simulation test device can be realized, and the uniformity and the stability of the erosion fluid of a single erosion spot area with the diameter of 10-30cm can be ensured.

Description

Technical Field

[0001] The present invention relates to a sand and wind environment simulation test device, and particularly to a system for regulating the uniformity of sand volume at the equal-section air outlet of a sand and wind environment simulation test device. Background Art

[0002] The existing sand and wind environment simulation test device (CN118858125A) includes a sand supply system, the sand supply system is connected to a wind tunnel, and a rotating core body is arranged in the wind tunnel. The wind tunnel is installed in a frame. The wind tunnel includes a confluent cylinder, a first cylinder, a flexible connection cylinder, a second cylinder, a special-shaped cylinder, and a diffuser cylinder arranged in sequence. The sand outlet channel of the sand supply system communicates with the inner cavity of the diffuser cylinder. A core body composed of a plurality of channel pipes arranged in an array is arranged in the diffuser cylinder. Each channel pipe includes a reduced-diameter section, a throat section, and an enlarged-diameter section connected in sequence. The cross-sections of the reduced-diameter section and the enlarged-diameter section are rectangular. There is a gap between the tube walls at the distal ends of any two adjacent channel pipes, and there is no gap between the tube walls at the proximal ends of any two adjacent channel pipes. A sand pushing mechanism is arranged on the core body. The sand pushing mechanism includes a push plate sleeved on all channel pipes at the same time. The push plate is connected to a reciprocating cam motion mechanism. During the working process of the reciprocating cam motion mechanism, the sand grains between adjacent channel pipes are axially extruded when the push plate moves forward along the channel pipes to send the sand grains to the front of the distal end of the channel pipes. The aforementioned device preferably ensures the fluid uniformity of strong sand and wind acting on the target area, but during use, the sand grains fall from the top edge of the front end of each channel pipe. The size of a single erosion spot area cannot be too large or too small (it is preferably when the aperture of the corresponding channel pipe is 12 - 15 mm). It is difficult to uniformly and precisely regulate the sand volume at the equal-section air outlet during the high-speed erosion process. The equal-section air outlet refers to the front port of the channel pipe. Summary of the Invention

[0003] The purpose of the present invention is to provide a system for regulating the uniformity of sand volume at the equal-section air outlet of a sand and wind environment simulation test device, aiming to achieve the uniform regulation and precise regulation of the sand volume at the equal-section air outlet of the device.

[0004] The present invention adopts the following technical solutions.

[0005] A system for regulating the uniformity of sand volume at the equal-section air outlet of a sand and wind environment simulation test device includes a sand supply device, a wind tunnel, and an adjusting mechanism for adjusting the sand and wind volume. The wind tunnel includes a confluent cylinder, a first cylinder, a flexible connection cylinder, a second cylinder, a conical cylinder, and a diffuser cylinder arranged in sequence. The adjusting mechanism includes a plurality of outer pipes arranged in the inner cavity of the diffuser cylinder. The inlet of each outer pipe communicates with the conical cylinder. The plurality of outer pipes axially cover the inner pipe. A strip-shaped slit is axially arranged at the top of the inner pipe, and the strip-shaped slit communicates with the sand supply port of the sand supply device. A steel column is in clearance fit with the inner cavity of the inner pipe, and the steel column is connected to a driving mechanism.

[0006] In order to better achieve the uniform regulation and precise regulation of the sand volume at the equal-section air outlet, the tip of each outer pipe has an inclined surface facing the axis of the inner pipe, and the root of the inclined surface is close to the front end of the inner pipe.

[0007] As an optimal solution, the inner pipe adopts a rigid circular pipe.

[0008] In order to more smoothly achieve the regulation of the sand volume at the equal-section air outlet, the inner pipes at different heights are staggered from each other, and the gap between adjacent inner pipes serves as the channel for sand grains to fall to the strip-shaped slit.

[0009] In order to more smoothly and stably achieve the regulation of the sand volume at the equal-section air outlet, the bottom of the diffusion cylinder directly below the sand supply port has an open mouth, and the surplus sand grains fall from the open mouth during the sand supply process.

[0010] Furthermore, the strip-shaped slit has a slope structure, and the distance between the front end of the strip-shaped slit and the front end of the inner pipe is not less than 20 mm.

[0011] In order to more smoothly achieve the regulation of the sand volume at the equal-section air outlet, the sand supply pipe of the sand supply device is installed on a swing mechanism, and the sand supply port of the sand supply pipe is controlled by the swing mechanism to reciprocate along the length direction of the strip-shaped slit.

[0012] Preferably, the driving mechanism includes a motor installed on the frame, the output end of the motor is connected to a cam, a lug is provided on the push plate, the lug extends out of the strip-shaped hole on the side wall of the diffusion cylinder and abuts against an elastic component. When the cam presses the lug, the push plate is pushed forward, and the elastic component stores energy during this process. When the cam does not press the lug, the push plate is driven to reset by means of the elastic component; the tail end of the steel column is fixedly connected to the push plate, and the front section of the steel column is located inside the inner pipe cavity.

[0013] In order to ensure that the erosion air flow smoothly enters the outer pipe, through holes are provided on the push plate. The outer pipe passes through the through holes on the push plate and is connected to a second push plate. The second push plate is also an orifice plate. The tail end of the outer pipe is fixedly connected to the second push plate. Specifically, the tail section of the outer pipe extends into the hole of the second push plate and is fixedly connected to the second push plate; the inner pipe and the outer pipe are fixedly connected to a limit plate, and the limit plate is installed on the frame. During use, the second push plate, the inner pipe, and the outer pipe are fixed, and the push plate and the steel column reciprocate. The erosion air flow in the diffusion cylinder impacts on the second push plate and can smoothly enter the outer pipe.

[0014] Beneficial effects: By adopting the solution of the present invention, not only can the uniform regulation and precise regulation of the sand volume at the equal-section air outlet of the sand and wind environment simulation test device be achieved, but also the uniformity and stability of the erosion fluid in a single erosion spot area with a diameter of 10 - 30 cm can be ensured. Description of the Drawings

[0015] Figure 1 It is a three-dimensional schematic diagram of the sand and wind environment simulation test device in Embodiment 1; Figure 2 Schematic cross-sectional view of the sandstorm environment simulation test device in Example 1; Figure 3 Schematic three-dimensional view of the regulation system for the uniformity of the sand volume at the equal-section air outlet of the sandstorm environment simulation test device in Example 1; Figure 4 For Figure 2 Schematic view in the direction of A in Figure 5 For Figure 2 Schematic view in the direction of B in Figure 6 For Figure 3 Enlarged view of part C in

[0016] Figure 7 Graph of the erosion uniformity detection results of the corresponding target target area in Example 1 (average wind speed 24 m / s); Figure 8 Graph of the uniformity detection results of the corresponding target target area in Example 1 (average wind speed 23.5 m / s); Figure 9 Graph of the uniformity detection results of the corresponding target target area in Example 1 (average wind speed 25 m / s); Figure 10 Graph of the uniformity detection results of the corresponding target target area in Example 2 (average wind speed 25 m / s); Figure 11 Graph of the uniformity detection results of the corresponding target target area in Comparative Example 1 (average wind speed 23.5 m / s); Figure 12 Graph of the uniformity detection results of the corresponding target target area in Comparative Example 1 (average wind speed 24 m / s); Figure 13 Graph of the uniformity detection results of the corresponding target target area in Comparative Example 3 (average wind speed 23.5 m / s). Detailed implementation manners

[0017] The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Example 1

[0018] Combined with Figures 1 to 6As shown in the figure, a control system for the uniformity of sand volume at the equal-section air outlet of a sand and wind environment simulation test device includes a sand supply device, a wind tunnel, and an adjustment mechanism for adjusting the sand and wind volume. The wind tunnel includes a collector cylinder 10, a first cylinder 11, a flexible connection cylinder 12, a second cylinder 13, a conical cylinder 14, and a diffuser cylinder 15 arranged in sequence. The adjustment mechanism includes a number of outer pipes 20 arranged in the inner cavity of the diffuser cylinder 15. The inlet of each outer pipe 20 is communicated with the conical cylinder 14 (substantially, the inner cavity of the outer pipe 20, the inner cavity of the diffuser cylinder 15, and the conical cylinder 14 are interconnected). A plurality of outer pipes 20 are axially wrapped and fixed on the inner pipe 21 by a stainless steel clamp 33. A strip-shaped slit 22 is axially arranged at the top of the inner pipe 21, and the strip-shaped slit 22 is communicated with the sand supply port 8 of the sand supply device. A steel column 23 is in clearance fit with the inner cavity of the inner pipe 21, and the steel column 23 is connected to a driving mechanism.

[0019] In this embodiment, the tip of each outer pipe 20 has an inclined surface 24 facing the axis of the inner pipe 21. The root of the inclined surface 24 is close to the front end of the inner pipe 21. The outer pipe 20 is a needle tube made of stainless steel (the front section of the needle tube has an inclined surface 24). The inner diameter of the outer pipe 20 is 1.2 mm, and the outer diameter is 1.4 mm. The inner pipe 21 is a rigid circular pipe made of stainless steel. The inner diameter of the inner pipe 21 is 18 mm, and the outer diameter is 24 mm.

[0020] In this embodiment, in combination with Figure 4 As shown in the figure, the inner pipes 21 at different heights are staggered from each other. The gap between adjacent inner pipes 21 (that is, the space between two adjacent inner pipes 21) serves as a channel for sand grains to fall to the strip-shaped slit 22. At the bottom of the diffuser cylinder 15 directly below the sand supply port 8, there is an open mouth 25, and the surplus sand grains fall from the open mouth 25 during the sand supply process. The strip-shaped slit 22 has a slope structure, and the distance between the front end of the strip-shaped slit 22 and the front end of the inner pipe 21 is 22 mm.

[0021] In this embodiment, the sand supply pipe of the sand supply device is installed on a swing mechanism, and the sand supply port 8 of the sand supply pipe is controlled to reciprocate along the length direction of the strip-shaped slit 22 through the swing mechanism.

[0022] In this embodiment, the driving mechanism includes a motor 9 installed on the frame 3. The output end of the motor is connected to a cam. A lug is provided on the push plate 30. The lug extends out of the strip-shaped hole on the side wall of the diffusion cylinder 15 and abuts against the elastic component. When the cam presses the lug, the push plate 30 is pushed forward, and the elastic component stores energy during this process. When the cam does not press the lug, the push plate 30 is driven to reset by means of the elastic component. The tail end of the steel column 23 is fixedly connected to the push plate 30, and the front section of the steel column 23 is located in the inner cavity of the inner tube 21. A through hole is provided on the push plate 30. After passing through the through hole on the push plate 30, the outer tube 20 is connected to the second push plate 31. The second push plate 31 is also a perforated plate. The tail end of the outer tube 20 is fixedly connected to the second push plate 31. Specifically, the tail section of the outer tube 20 extends into the hole 32 of the second push plate 31 and is fixedly connected to the second push plate 31. The inner tube 21 and the outer tube 20 are fixedly connected to the limit plate 34, and the limit plate 34 is installed on the frame 3. During use, the second push plate 31, the inner tube 21, and the outer tube 20 remain stationary, while the push plate 30 and the steel column 23 reciprocate.

[0023] In this embodiment, except for the control system described in this embodiment, the main structure of the sand and wind environment simulation test device refers to Embodiment 1 of CN118858125A.

[0024] Embodiment 2: An equal-section air outlet sand volume uniformity control system for a sand and wind environment simulation test device. Referring to Embodiment 1, the main difference from Embodiment 1 is that the inner diameter of the inner tube 21 is 24 mm and the outer diameter is 30 mm.

[0025] Comparative Example 1: Use the previously developed sand and wind environment simulation test device (mainly referring to Embodiment 1 of CN118858125A), the inner side length of the inner cavity of its channel tube is 18 mm, and the wall thickness is 3 mm.

[0026] Comparative Example 2: Use the previously developed sand and wind environment simulation test device (mainly referring to Embodiment 1 of CN118858125A), the inner side length of the inner cavity of its channel tube is 24 mm, and the wall thickness is 6 mm.

[0027] Comparative Example 3: Use the previously developed sand and wind environment simulation test device (mainly referring to Embodiment 1 of CN118858125A), the inner side length of the inner cavity of its channel tube is 12 - 15 mm (among them, the inner side lengths of three channel tubes are 12 mm, the inner side lengths of three channel tubes are 15 mm, and the inner side length of the other channel tube is 14 mm), and the outer side length of the channel tube wall is 21 mm.

[0028] Regulatory tests were carried out using the solutions in Example 1, Comparative Example 1, and Comparative Example 3 respectively to regulate the average wind speed V (m / s) of the fluid at a distance of 5 meters from the air outlet at the distal end (front end) of the diffusion tube 15. Target plates were respectively arranged at a distance of 5 meters from the air outlet at the distal end of the diffusion tube 15 to detect the erosion situation on the target plates. The results showed that when the average wind speed was 23.5 m / s, the corresponding erosion area on the target plate in Example 1 was as shown in Figure 8 shown. The uniformity of the erosion points in the entire target area was relatively good, and the uniformity of the erosion fluid in a single erosion spot area 100 was also relatively good; when the average wind speed was 24 m / s, the corresponding erosion area on the target plate in Example 1 was as shown in Figure 7 shown. The uniformity of the erosion points in the entire target area was very good, and the uniformity of the erosion fluid in a single erosion spot area 100 was also very good; when the average wind speed was 25 m / s, the corresponding erosion area on the target plate in Example 1 was as shown in Figure 9 shown. The uniformity of the erosion points in the entire target area was relatively poor, but the uniformity of the erosion fluid in a single erosion spot area 100 was relatively good; when the average wind speed was 25 m / s, the corresponding erosion area on the target plate in Comparative Example 2 was as shown in Figure 10 shown. The uniformity of the erosion points in the entire target area was relatively poor, but the uniformity of the erosion fluid in a single erosion spot area 100 was relatively good; when the average wind speed was 26 m / s and 25 m / s, the corresponding erosion areas on the target plates in Comparative Example 2 were both unqualified; when the average wind speed was 23.5 m / s, the corresponding erosion area on the target plate in Comparative Example 1 was as shown in Figure 11 shown. The uniformity of the erosion points in the entire target area was relatively good, but the uniformity of the erosion fluid in a single erosion spot area 100 was relatively poor; when the average wind speed was 24 m / s, the corresponding erosion area on the target plate in Comparative Example 1 was as shown in Figure 12 shown. The uniformity of the erosion points in the entire target area was poor, and the uniformity of the erosion fluid in a single erosion spot area 100 was also poor; when the average wind speed was 25 m / s and 26 m / s, the uniformity of the corresponding erosion areas on the target plates in Comparative Example 1 and the erosion fluid in a single erosion spot area 100 were both very poor. In addition, when the average wind speed was 23.5 m / s, the corresponding erosion area on the target plate in Comparative Example 3 was as shown in Figure 13 shown. The uniformity of the erosion points in the entire target area was relatively good, and the uniformity of the erosion fluid in a single erosion spot area 100 was also relatively good. When the average wind speed was 23.5 m / s, 24 m / s, or 25 m / s, the corresponding erosion areas on the target plates in Comparative Example 2 were completely unqualified, and there was an obvious blank area in the middle of a single erosion spot area. It was analyzed that this was due to the too large inner cavity side length of the channel tube, resulting in sand particles being unable to act on the middle area of the erosion spot area.

[0029] It can be seen from this that by adopting the solution of the embodiment of the present invention (especially Embodiment 1), it is possible to ensure the uniformity and stability of the erosion fluid in a relatively large range of sand material pore diameters (inner diameter of the inner tube 21), which ranges from 18 to 24 mm, expand the effective erosion surface area corresponding to a single erosion spot area, and more importantly, it is possible to achieve the uniform regulation and precise regulation of the sand volume uniformity at the equal-section air outlet of the sand and wind environment simulation test device. The test shows that the preferred average wind speed after precise regulation is 23.5 m / s to 24 m / s.

Claims

1. A control system for the uniformity of sand quantity at the equal-section air outlet of a sandstorm environment simulation test device, comprising a sand supply device, a wind tunnel, and an adjusting mechanism for adjusting the wind and sand volume. The wind tunnel includes a confluent cylinder (10), a first cylinder (11), a flexible connection cylinder (12), a second cylinder (13), a conical cylinder (14), and a diffuser cylinder (15) arranged in sequence; characterized in that: The adjusting mechanism includes a plurality of outer tubes (20) arranged in the inner cavity of the diffusion cylinder (15). The inlet of each outer tube (20) is connected to the conical cylinder (14). The multiple outer tubes (20) are axially coated on the inner tube (21). A strip-shaped slit (22) is axially arranged at the top of the inner tube (21). The strip-shaped slit (22) communicates with the sand supply port of the sand supply device. A steel column (23) is in clearance fit with the inner cavity of the inner tube (21), and the steel column (23) is connected to the driving mechanism.

2. The equal cross-section air outlet sand quantity uniformity regulation and control system according to claim 1, wherein: The tip of each outer tube (20) has an inclined surface (24). The inclined surface (24) faces the axis of the inner tube (21), and the root of the inclined surface (24) is close to the front end of the inner tube (21).

3. The equal cross-section air outlet sand volume uniformity regulation system according to claim 2, characterized in that: The inner tube (21) is a rigid circular tube.

4. The equal cross-section air outlet sand volume uniformity regulation system according to claim 3, characterized in that: The inner tubes (21) at different heights are staggered from each other, and the gap between adjacent inner tubes (21) serves as a channel for sand grains to fall to the strip-shaped slit (22).

5. The equal cross-section air outlet sand volume uniformity control system according to claim 1, characterized in that: The bottom of the diffusion cylinder (15) directly below the sand supply port has an opening (25), and the surplus sand grains fall from the opening (25) during the sand supply process.

6. The equal-section air outlet sand volume uniformity regulation system according to claim 1, characterized in that: The strip-shaped slit (22) has a slope structure, and the distance between the front end of the strip-shaped slit (22) and the front end of the inner tube (21) is not less than 20 mm.

7. The equal cross-section air outlet sand volume uniformity regulation system according to claim 1, characterized in that: The sand supply pipe (26) of the sand supply device is installed on the swinging mechanism, and the sand supply port of the sand supply pipe is controlled by the swinging mechanism to reciprocate along the length direction of the strip-shaped slit (22).

8. The equal-section air outlet sand volume uniformity regulation system according to any one of claims 1-7, characterized in that: The driving mechanism includes a motor installed on the frame (3). The output end of the motor is connected to a cam. An ear is provided on the push plate (30). The ear extends out of the strip-shaped hole on the side wall of the diffusion cylinder (15) and abuts against the elastic component. When the cam presses the ear, the push plate (30) is pushed forward, and the elastic component stores energy during this process. When the cam does not press the ear, the push plate (30) is driven to reset by means of the elastic component. The tail end of the steel column (23) is fixedly connected to the push plate (30), and the front section of the steel column (23) is located in the inner cavity of the inner tube (21).

9. The cross-sectional air volume uniformity regulation system for tuyere sand according to claim 8, characterized in that: The push plate (30) is provided with through holes. After the outer tube (20) passes through the through holes on the push plate (30), it is connected to the second push plate (31). The second push plate (31) is also a perforated plate, and the tail end of the outer tube (20) is fixedly connected to the second push plate (31). The inner tube (21) and the outer tube (20) are fixedly connected to the limiting plate (34), and the limiting plate (34) is installed on the frame (3). During use, the second push plate (31), the inner tube (21), and the outer tube (20) are fixed, and the push plate (30) and the steel column (23) reciprocate.

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