Device for testing sand and dust concentration and wind speed of wind section of strong sandstorm

Abstract

The invention discloses a device for testing the sand dust concentration and the wind speed of a wind section of strong sandstorm, and relates to the technical field of sand dust concentration and wind speed testing. The pull rope transmission assemblies are symmetrically arranged on the rack; the wind-sand-resistant mesh enclosure mechanism and the sand-dust detection mechanism are respectively arranged at the middle section and the tail end of the pull rope transmission assembly, and the wind-sand-resistant mesh enclosure mechanism and the sand-dust detection mechanism cooperate with each other and adopt a gradient tower to measure wind-sand flow data at different heights. According to the invention, through the action of the pull rope transmission assembly, stable acquisition of the sand dust detection mechanism on the sand flow data and protection of the anti-sand wind net cover machine on the sampling tower are cooperatively operated, so that the sampling tower can stably work for a long time under extremely severe strong sand wind conditions, and meanwhile, through gradient operation of the sampling tower, the sampling efficiency is improved. The sampling tower can measure wind-sand flow data at different heights, and the reliability of the device and the collection accuracy are improved.

Description

Technical Field

[0001] This invention relates to the field of sand and dust concentration and wind speed testing technology, specifically to a device for testing sand and dust concentration and wind speed at a wind cross section during strong sandstorms. Background Technology

[0002] Aeolian sand movement is a typical gas-solid two-phase flow problem, which is extremely complex. Concentration and wind speed are the two most critical core parameters for describing its dynamics. The testing of aeolian sand movement is usually used in aeolian physics research, military equipment testing, evaluation of the wind and sand corrosion resistance of materials, and sand ingress test of vehicle engines. Due to the complexity of the aeolian sand environment, not only are certain protective functions required for the testing equipment to enable the device to work stably for a long time under extremely harsh strong wind and sand conditions, but the measurement height also needs to be considered in order to obtain aeolian sand flow data at different heights. To this end, a sand and dust concentration and wind speed testing device for strong wind and sand cross sections is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a device for testing sand and dust concentration and wind speed at a cross-section during strong sandstorms. This device uses a rope-driven transmission component to coordinate the stable acquisition of sand and dust flow data by the sand and dust detection mechanism with the protection of the sampling tower by the sand and dust netting machine. This allows the sampling tower to work stably for a long time under extremely harsh strong sandstorm conditions. At the same time, through the gradient operation of the sampling tower, the sampling tower can measure sand and dust flow data at different heights, improving the reliability of the device and the accuracy of the data acquisition.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a device for testing sand and dust concentration and wind speed at a wind cross section during strong sandstorms, comprising: a frame; a rope transmission assembly symmetrically arranged on the frame; and a sand and dust detection mechanism and a sand and dust netting mechanism respectively arranged in the middle and at the end of the rope transmission assembly, wherein the sand and dust netting mechanism and the sand and dust detection mechanism cooperate with each other and use a gradient tower to measure sand and dust flow data at different heights; the sand and dust detection mechanism includes two vertical rails, each vertical rail having a plurality of sliders; a transmission plate slidably installed between two horizontally distributed sliders, wherein the transmission plate at the top is connected to the end of the tension transmission assembly; and a base block fixed to the bottom of each vertical rail, with a base plate fixed on the two base blocks, and the base plate and the plurality of transmission plates arranged side by side; and also includes a sampling tower.

[0005] Preferably, the frame includes a base plate, two support plates fixed in the middle of the base plate, and an assembly plate fixed on the upper opposite surfaces of the two support plates, wherein the two vertical rails containing the sand and dust detection mechanism are fixed to the bottom of the assembly plate.

[0006] Preferably, the sampling towers are arranged in two sets and symmetrically distributed on both sides of several transmission plates; each set of sampling towers includes two support rods, which are rotatably installed on one side of the base plate via a first rotating shaft, and several pins are fixed to the two support rods opposite each other on several transmission plates; and two connecting rods are rotatably installed on one side of each transmission plate via two second rotating shafts, and the ends of the two connecting rods away from the transmission plate are rotatably installed at the two ends of their corresponding pins; a sensor group is installed in the middle of each pin for collecting data on peripheral wind and sand flow.

[0007] Preferably, each of the pins is also provided with a protective cover for the protection of the corresponding sensor group. The protective cover includes a shell fixed between the two connecting rods and placed on the outer periphery of the sensor group; and a through slot that is circumferentially opened on the shell and corresponds one-to-one with the detection end of the sensor group. When the shell rotates relative to the sensor group step by step, several through slots are used for the exposure of the detection end of the sensor group.

[0008] Preferably, the inner wall of the cover is also provided with cleaning cotton distributed in a ring at intervals with several through slots. When the cover rotates relative to the sensor group step by step, several cleaning cotton are used to clean the detection end of the sensor group.

[0009] Preferably, the anti-sand netting mechanism is provided in two sets and symmetrically distributed on both sides of the assembly plate. Each anti-sand netting mechanism includes a crossbar fixed to one side of the assembly plate, an assembly rod fixed to the outer end of the crossbar, and a sliding rod at both ends of the bottom of the assembly rod; and a transmission component sleeved between the two sliding rods. The transmission component and the inner side of the assembly rod are provided with a dustproof side net assembly, and their outer sides are connected to a pull rope transmission component. When the pull rope transmission component drives the transmission component to move closer to and away from the position of the assembly rod, the dustproof side net assembly adaptively retracts and extends.

[0010] Preferably, the dustproof side net assembly includes a plurality of transmission sleeves sleeved on each of the slide rods, wherein two transmission sleeves at the bottom are fixed to both ends of the transmission component, and two transmission sleeves at the top are fixed to the assembly rod; a mounting frame fixed inside each of the transmission sleeves; and two transmission bars rotatably mounted inside each of the mounting frames via a third rotating shaft, with each transmission bar close to and intersecting with its adjacent transmission bars; it also includes a horizontal shaft penetrating the intersection of two sets of horizontally distributed transmission bars, and a mesh surface fixed to the inner side of the plurality of horizontal shafts, with the bottom end of the mesh surface extending downward and fixed to the transmission component; Several sets of horizontally distributed wires are fixed at both ends of the two horizontal axes. The two sets of wires distributed in front and behind, together with the two mesh surfaces, form a rectangular protection area.

[0011] Preferably, a plurality of first sensors are also provided on the outer side of each of the horizontal axes.

[0012] Preferably, each set of the pull rope transmission assembly includes a fixed sleeve and a movable sleeve respectively fixed to the transmission component and the middle of the assembly rod; a first mounting seat disposed on the top of the assembly rod, wherein a first positioning wheel is rotatably mounted in the middle of the first mounting seat; a second mounting seat fixed to the top of the assembly plate, wherein a second positioning wheel is disposed in the second mounting seat; a base fixed to one end of the base plate, wherein a motor is fixed to the surface of the base, and a roller fixed to the output end of the motor; and a rope fixed to the roller, wherein the end of the rope away from the roller passes through the fixed sleeve, the movable sleeve, the first positioning wheel, and the second positioning wheel in sequence and is fixed to the transmission plate placed on the top, and the rope is fixed to the fixed sleeve; and a first spring and a second spring, wherein the first spring is disposed on the outer wall of the rope between the fixed sleeve and the movable sleeve, and the second spring is disposed on the outer wall of the rope between the transmission plate and the assembly plate placed on the top.

[0013] Preferably, a second sensor is also provided on the top of the assembly plate.

[0014] Beneficial effects: In weak wind conditions, the rope transmission assembly drives the anti-sand netting mechanism and the dust detection mechanism to retract synchronously. At this time, the transmission plates where the dust detection mechanism is located move towards the base plate and converge, causing the sampling tower to deflect downwards to collect wind and sand flow data of ground dust under weak wind conditions. This process does not require the anti-sand netting mechanism to operate, as it is in a retracted state. In strong wind conditions, the dust swirling up from the ground rises. To collect wind and sand flow data of dust at different heights, the transmission plates where the dust detection mechanism is located extend away from the base plate, and the sampling tower tilts upwards synchronously to collect wind and sand flow data at different heights. During this process, the anti-sand netting mechanism extends downwards synchronously and covers the outer perimeter of the dust detection mechanism, protecting against large stones and reducing the direct impact of large stones on the sampling tower, thus improving the service life of the sampling tower.

[0015] In another embodiment of the present invention, when the two support rods move upward or downward, the two connecting rods can drive the cover to rotate relative to the sensor group in stages. Simultaneously with the above process, when the cover stops, the several through slots opened in the ring on the cover can always keep the detection end of the sensor group exposed for measurement, while realizing the protection process of the sensor group. In another embodiment of the present invention, during the rotation of the cover, several cleaning cotton can clean the detection end of the sensor group, remove accumulated sand particles, and avoid blockage. In another embodiment of the present invention, the two mesh surfaces can be adaptively stretched or shortened under the condition of widening or narrowing the distance between the two sets of horizontal axes. Since the two horizontal axes distributed on the left and right are respectively fixed with mesh lines at both ends, a protective net is established on the front and rear sides of the sampling tower. With the two mesh surfaces on the left and right sides of the sampling tower, the safety protection around the sampling tower can be realized. Attached Figure Description

[0016] Figure 1 This is a first-view three-dimensional structural diagram of the present invention; Figure 2 This is a second-view three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the third-view three-dimensional structure of the present invention; Figure 4 for Figure 3 A partially enlarged structural diagram; Figure 5 This is a magnified structural diagram of point B; Figure 6 This is a side view of the structure of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of AA; Figure 8 for Figure 7 A partially enlarged structural diagram.

[0017] In the diagram: 111, base plate; 112, support plate; 113, assembly plate; 114, base; 115, motor; 116, roller; 117, rope; 211, vertical rail; 212, bottom block; 213, base plate; 214, transmission plate; 215, support rod; 216, pin; 217, connecting rod; 218, second mounting seat; 219, second positioning wheel; 220, second spring; 221, cover; 222, through groove; 223, cleaning... 224. Cotton; 311. Sensor group; 312. Crossbar; 313. Assembly rod; 314. Slide rod; 315. Transmission component; 316. Transmission sleeve; 317. Mounting frame; 318. Transmission bar; 319. Horizontal shaft; 319. Fixed sleeve; 3191. Movable sleeve; 320. First spring; 321. First sensor; 322. Mesh surface; 323. Mesh cable; 324. First mounting base; 325. First positioning wheel; 411. Second sensor. Detailed Implementation

[0018] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. The various embodiments of this invention are described in detail below with reference to the accompanying drawings. Example 1

[0019] Please see Figures 1 to 8The present invention preferably provides a technical solution: a device for testing sand and dust concentration and wind speed at a wind cross section during strong sandstorms, comprising: a frame; a rope transmission assembly symmetrically arranged on the frame; and a sand and dust detection mechanism and a sand and dust detection mechanism respectively arranged in the middle and at the end of the rope transmission assembly, wherein the sand and dust detection mechanism and the sand and dust detection mechanism cooperate with each other and use a gradient tower to measure sand and dust flow data at different heights; the sand and dust detection mechanism includes two vertical rails 211, each vertical rail 211 having a plurality of sliders; a transmission plate 214 slidably installed between the two horizontally distributed sliders, wherein the transmission plate 214 placed at the top is connected to the end of the tension transmission assembly; The system also includes a base block 212 fixed to the bottom of each vertical rail 211, with a base plate 213 fixed on each base block 212, and the base plate 213 and several transmission plates 214 arranged side by side; it also includes a sampling tower, in which, under weak wind and sand conditions, the rope transmission assembly can drive the wind-resistant sand netting mechanism and the sand and dust detection mechanism to retract synchronously, so that the sampling tower can measure wind and sand flow data at low heights; under strong wind and sand conditions, the rope transmission assembly can drive the wind-resistant sand netting mechanism and the sand and dust detection mechanism to extend longitudinally, wherein the wind-resistant sand netting mechanism covers the outer periphery of the sand and dust detection mechanism and provides protection and blocking for large sand and gravel, and the sampling tower can adjust the sampling angle to measure wind and sand flow data at different heights.

[0020] In this embodiment, such as Figure 1 , 2 As shown, rope drive assemblies are symmetrically installed on both sides of the frame. At the same time, wind-resistant sand netting mechanism and sand and dust detection mechanism are installed in the middle and on both sides of the frame, respectively. The wind-resistant sand netting mechanism and sand and dust detection mechanism can be connected to the middle and end of the rope drive assembly, respectively. When the rope drive assembly is running, it can drive the wind-resistant sand netting mechanism and sand and dust detection mechanism to run synchronously to cope with different detection environments. Several transmission plates 214 slide longitudinally between the two vertical rails 211 where the sand and dust detection mechanism is located, such as... Figure 3 As shown, the transmission plate 214 at the top is connected to the end of the rope transmission assembly, and a base plate 213 fixed to the vertical rail 211 by the base block 212 is provided below the transmission plate 214 at the bottom. Since the length of the two vertical rails 211 is fixed, when the rope transmission assembly is running, it can drive several transmission plates 214 to expand away from the base plate 213 or retract towards the base plate 213 between the two vertical rails 211, so as to realize the adjustment of the sampling tower's collection angle. At the same time, the rope transmission assembly synchronously drives the wind and sand hood mechanism to adaptably expand downward or retract upward. Specifically, when encountering a weak wind environment, the drive rope transmission component is unwound, which in turn drives the anti-sand netting mechanism and the sand and dust detection mechanism to retract synchronously. At this time, the several transmission plates 214 where the sand and dust detection mechanism is located move towards the bottom plate 213 and come together, and the sampling tower deflects downward to collect the wind and sand flow data of ground sand and dust under weak wind conditions. This process does not require the anti-sand netting mechanism to operate, as it is in a retracted state. When encountering strong winds, the sand and dust swirling up from the ground rise. In order to collect wind and sand flow data at different heights, the drive rope transmission component is wound up, and the several transmission plates 214 where the sand and dust detection mechanism is located expand away from the base plate 213. The sampling tower tilts upwards in sync to collect wind and sand flow data at different heights. During this process, the anti-sand netting mechanism expands downwards and covers the outer perimeter of the sand and dust detection mechanism to protect against large stones. Because the impact of sand particles (velocity > 15m / s) in strong wind and sand environments is too great, it can easily lead to structural failure. This application can reduce the direct impact of large sand and gravel on the sampling tower and improve the service life of the sampling tower.

[0021] Furthermore, the frame includes a base plate 111, two support plates 112 fixed to the middle of the base plate 111, and an assembly plate 113 fixed to the upper opposite surfaces of the two support plates 112. The two vertical rails 211 containing the sand and dust detection mechanism are fixed to the bottom of the assembly plate 113. Figure 1 , 2 As shown in Figure 3. Example 2

[0022] In another embodiment of the present invention, two sets of sampling towers are symmetrically distributed on both sides of several transmission plates 214; each set of sampling towers includes two support rods 215, which are rotatably mounted on one side of the base plate 213 via a first rotating shaft, and several pins 216 are fixed to the two support rods 215 opposite to the several transmission plates 214; and two connecting rods 217 are rotatably mounted on one side of each transmission plate 214 via two second rotating shafts, and the ends of the two connecting rods 217 away from the transmission plate 214 are rotatably mounted to the two ends of their corresponding pins 216; a sensor group 224 is installed in the middle of each pin 216 for the collection of peripheral wind and sand flow data.

[0023] like Figure 3As shown, the two sets of sampling towers are symmetrically distributed. The two support rods 215 of each sampling tower are rotatably installed at one end through the first rotating shaft and the two sides of the support rod 215. Several pins 216 are fixed in between. A sensor group 224 is set in the middle of each pin 216. Two connecting rods 217 are rotatably installed on one side of each transmission plate 214 through two second rotating shafts. Several sets of connecting rods 217 correspond one-to-one with several pins 216. The two connecting rods 217 in each set are rotatably installed at both ends of their corresponding pins 216. Therefore, when several transmission plates 214 retract inward toward the base plate 213 or expand away from the base plate 213, several sets of connecting rods 217 can drive the two support rods 215 to move downward or upward. Specifically, under weak wind conditions, the sensor group 224 can be lowered close to the ground and collect sand and dust data. Under strong wind conditions, the sensor group 224 deflects upward to measure sand and dust data at different heights. It is worth noting that this sensor group 224 is based on existing mature technology. It can be selected as an optical laser scattering particulate sensor, temperature and humidity sensor, etc., which are distributed in a ring and connected to a computer terminal. Among them, the optical laser scattering particulate matter sensor is used to detect sand particle concentration. Its principle is: laser irradiates particulate matter in the air, and the mass concentration of particulate matter is reflected by measuring the intensity of the scattered light. Temperature and humidity sensors are used to monitor ambient temperature and humidity in order to correct data. Their principle is to convert ambient temperature and humidity into electrical signals through humidity and temperature sensing elements. They mainly use two measurement principles: capacitive / resistive (humidity) and thermistor / thermocouple (temperature). Example 3

[0024] As another embodiment of the present invention, each pin 216 is also provided with a protective cover for protecting the corresponding sensor group 224. The protective cover includes a housing 221 fixed between the two connecting rods 217 and placed on the outer periphery of the sensor group 224; and through slots 222 that are annularly opened on the housing 221 and correspond one-to-one with the detection ends of the sensor group 224. When the housing 221 rotates relative to the sensor group 224 step by step, several through slots 222 are used for the exposure of the detection ends of the sensor group 224.

[0025] like Figure 3 , 5As shown, the sensor assembly 224 is annularly mounted in the middle of the pin 216, while the cover 221, which is fixed to the ends of the two connecting rods 217, covers the outer periphery of the sensor assembly 224. Since the two connecting rods 217 are rotatably mounted to the pin 216, and the pin 216 is fixedly mounted to the support rod 215, when the two support rods 215 move up or down, the two connecting rods 217 can drive the cover 221 to rotate relative to the sensor assembly 224 in stages. Simultaneously with the above process, when the cover 221 stops, the several through slots 222 annularly opened on the cover 221 can always keep the detection end of the sensor assembly 224 exposed for measurement. Example 4

[0026] In another embodiment of the present invention, the inner wall of the cover 221 is also provided with cleaning cotton 223 arranged in a ring and spaced apart from a plurality of through grooves 222. When the cover 221 rotates relative to the sensor group 224 step by step, the plurality of cleaning cotton 223 are used to clean the detection end of the sensor group 224.

[0027] As can be seen from Embodiment 3, the housing 221 can rotate relative to the sensor assembly 224 in stages, such as... Figure 5 As shown, since several cleaning cotton 223s and several through grooves 222s are distributed at intervals, when the cover 221 rotates, the cleaning cotton 223s can clean the detection end of the sensor group 224. Due to the turbulent airflow in a strong wind and sand environment, traditional sampling ports are prone to sampling deviation due to sand particle deposition. The cleaning cotton 223s in this application can remove accumulated sand particles and avoid blockage. Example 5

[0028] In another embodiment of the present invention, the anti-sand netting mechanism is provided in two sets and symmetrically distributed on both sides of the assembly plate 113. Each anti-sand netting mechanism includes a crossbar 311 fixed to one side of the assembly plate 113, an assembly rod 312 fixed to the outer end of the crossbar 311, and sliding rods 313 respectively provided at both ends of the bottom of the assembly rod 312; and a transmission component 314 sleeved between the two sliding rods 313. The transmission component 314 and the inner side of the assembly rod 312 are provided with a dustproof side net assembly, and their outer sides are connected to the pull rope transmission component. When the pull rope transmission component drives the transmission component 314 to move closer to and away from the position of the assembly rod 312, the dustproof side net assembly adaptively retracts and extends; furthermore, the dustproof side net assembly The component includes a plurality of transmission sleeves 315 fitted on each slide rod 313, wherein two transmission sleeves 315 at the bottom are fixed to both ends of the transmission member 314, and two transmission sleeves 315 at the top are fixed to the mounting rod 312; a mounting frame 316 fixed inside each transmission sleeve 315; and two transmission bars 317 rotatably mounted inside each mounting frame 316 via a third rotating shaft, wherein each transmission bar 317 is close to and intersecting with its adjacent transmission bar 317; and a horizontal shaft 318 passing through the intersection of the two sets of horizontally distributed transmission bars 317, and a mesh surface 322 fixed to the inner side of the plurality of horizontal shafts 318, wherein the bottom end of the mesh surface 322 extends downward and is fixed to the transmission member 314.

[0029] like Figure 3 , 4 As shown, the assembly rod 312 is fixed to the assembly plate 113 via the crossbar 311, while the transmission component 314 is installed on the two sliding rods 313 at the bottom of the assembly rod 312. The transmission component 314 and the inner side of the assembly rod 312 are provided with a dustproof side net assembly, and its outer side is connected to the pull rope transmission assembly. Specifically, the transmission component 314 is fixedly connected to the pull rope transmission assembly, and the assembly rod 312 is installed with the pull rope transmission assembly. When the pull rope transmission assembly drives the transmission component 314 to move closer to or away from the assembly rod 312, the dustproof side net assembly between the two adaptively retracts or expands. Specific dustproof side net components such as Figure 4 , 7As shown in Figure 8, several assembly rods 312 are fitted onto the two sliding rods 313 in a one-to-one correspondence. Two transmission sleeves 315 at the bottom are fixed to both ends of the transmission component 314, and two transmission sleeves 315 at the top are fixed to the assembly rods 312. Simultaneously, two transmission bars 317 are rotatably mounted on the mounting frame 316 fixed inside each transmission sleeve 315, and each transmission bar 317 is cross-connected with its adjacent transmission bar 317. This works in conjunction with the horizontal shafts 318 that pass through the intersections of the two horizontally distributed sets of transmission bars 317. When the rope-pulling transmission assembly drives the transmission component 314 to slide longitudinally, the several transmission bars 317 adaptively retract or extend outwards, thereby achieving the separation or convergence of several horizontal shafts 318. This results in the downward stretching and upward shortening of the mesh surface 322. Therefore, under strong wind and sand conditions, when the rope-pulling transmission assembly drives several transmission plates 214 to extend outwards away from the bottom plate 213 and deflects upwards on the sampling tower, it can simultaneously drive the transmission component 314 as follows... Figure 4 The mesh is lowered as shown so that the stretched mesh surface 322 can provide lateral protection for the sampling tower. Example 6

[0030] In another embodiment of the present invention, two horizontal axes 318 are arranged in several groups and each end is fixed with a network cable 323. The two groups of network cables 323 arranged in front and behind together with the two mesh surfaces 322 form a rectangular protective area.

[0031] As can be seen from Example 5, the two mesh surfaces 322 can be adaptively stretched or shortened under the condition that the distance between the two sets of horizontal axes 318 is expanded or reduced, because several sets of left-right distributed horizontal axes 318 have mesh lines 323 fixed at both ends, such as Figure 4 , 7 As shown in Figure 8, by establishing protective netting on the front and rear sides of the sampling tower, and combining it with the two mesh surfaces 322 on the left and right sides of the sampling tower, safety protection can be achieved around the sampling tower. Figure 1 , 2 As shown in Figure 3. Example 7

[0032] As another embodiment of the present invention, a plurality of first sensors 321 are also provided on the outer side of each horizontal axis 318. Here, the first sensors 321 are existing mature technologies, which can be selected as piezoelectric or triboelectric sensors in existing mature technologies. The principle is that sand particles hit the sensor surface to generate charge or vibration signals. The signal strength is related to the number and kinetic energy of the impacting particles to obtain sand concentration data. Because of its robust structure, it is not easily blocked by sand and dust, and is particularly suitable for high concentration measurement. Therefore, this application installs a plurality of first sensors 321 on the outer side of the corresponding horizontal axis 318. Example 8

[0033] In other embodiments of the present invention, each set of pull rope transmission components includes a fixed sleeve 319 and a movable sleeve 3191 respectively fixed to the transmission component 314 and the middle of the assembly rod 312; and a first mounting seat 324 provided on the top of the assembly rod 312, with a first positioning wheel 325 rotatably mounted in the middle of the first mounting seat 324; it also includes a second mounting seat 218 fixed on the top of the assembly plate 113, with a second positioning wheel 219 provided inside the second mounting seat 218; a base 114 fixed to one end of the base plate 111, with a motor 115 fixed on the surface of the base 114, and a roller 116 fixed to the output end of the motor 115; The system also includes a rope 117 fixed to the roller 116, wherein one end of the rope 117 away from the roller 116 passes through the fixed sleeve 319, the movable sleeve 3191, the first positioning wheel 325, and the second positioning wheel 219 in sequence and is fixed to the transmission plate 214 placed at the top, and the rope 117 is fixed to the fixed sleeve 319; it also includes a first spring 320 and a second spring 220, wherein the first spring 320 is disposed on the outer wall of the rope 117 between the fixed sleeve 319 and the movable sleeve 3191, and the second spring 220 is disposed on the outer wall of the rope 117 between the transmission plate 214 and the assembly plate 113 placed at the top.

[0034] It is known, such as Figure 7 As shown, two sets of rope drive components are symmetrically distributed, and one end of each rope 117 is connected to one of the two rollers 116. The other end of each rope passes through the fixed sleeve 319, the movable sleeve 3191, the first positioning wheel 325, and the second positioning wheel 219 on the same side, respectively, and extends and is fixed to the transmission plate 214 placed at the top. The fixed sleeve 319 is fixed to the rope 117, and cooperates with the first spring 320 on the outer wall of the rope 117 between the fixed sleeve 319 and the movable sleeve 3191, the second spring 220 on the outer wall of the rope 117 between the transmission plate 214 and the assembly plate 113, as follows: Figure 3 , 4 As shown in Figure 7, when the two motors 115 are running, during the winding of the two rollers 116, several transmission plates 214 are pulled to extend away from the base plate 213, and at the same time, the fixed sleeve 319 and the transmission component 314 are pulled to move away from the assembly rod 312, so as to realize the downward expansion process of the mesh surface 322 and the mesh line 323. Conversely, when the two rollers 116 are unwinding, the inward retraction of several transmission plates 214 and the upward retraction process of the mesh surface 322 and the mesh line 323 are realized. Example 9

[0035] As another embodiment of the present invention, a second sensor 411 is also provided on the top of the assembly plate 113. Here, the second sensor 411 is preferably a three-dimensional ultrasonic wind speed and direction sensor (also called an ultrasonic wind speed and direction meter), which is a mature existing technology. Its principle is to calculate the wind speed and wind direction by measuring the time difference or frequency change of ultrasonic waves in the propagation of the wind and the wind, combined with the superposition effect of the sound wave propagation speed and the wind speed.

Claims

1. A strong wind and sand wind section sand dust concentration and wind speed testing device, characterized by , comprising: a rack; a pull rope transmission assembly symmetrically arranged on the rack; and a wind sand resistant cover mechanism and a sand dust detection mechanism respectively arranged at the middle and the end of the pull rope transmission assembly, wherein the wind sand resistant cover mechanism and the sand dust detection mechanism cooperate with each other and adopt a gradient tower to measure wind sand flow data at different heights; the sand dust detection mechanism comprises two vertical rails (211), and a plurality of sliding blocks are arranged in each vertical rail (211); a transmission plate (214) is slidingly arranged between two sliding blocks distributed horizontally, wherein the transmission plate (214) at the top is connected to the end of the stretch transmission assembly; and a bottom block (212) is fixed at the bottom of each vertical rail (211), two bottom blocks (212) are fixed with a bottom plate (213), and the bottom plate (213) is arranged in parallel with a plurality of transmission plates (214); and a sampling tower.

2. The wind section sand dust concentration and wind speed testing device for strong wind sand according to claim 1, wherein: the rack comprises a base plate (111), two support plates (112) fixed at the middle of the base plate (111), and an assembly plate (113) fixed on the opposite sides of the upper part of the two support plates (112), wherein the two vertical rails (211) of the sand dust detection mechanism are fixed at the bottom of the assembly plate (113).

3. The wind section sand dust concentration and wind speed testing device for strong wind sand according to claim 2, wherein: the sampling tower is provided with two groups of sampling towers and is symmetrically distributed on both sides of the plurality of transmission plates (214); each group of sampling towers comprises two support rods (215), the two support rods (215) are respectively rotatably arranged on both sides of one end of the bottom plate (213) through first rotating shafts, and a plurality of pin shafts (216) are fixed on the corresponding plurality of transmission plates (214) on the opposite sides of the two support rods (215); and two connecting rods (217) are rotatably arranged on both sides of one end of each transmission plate (214) through two second rotating shafts, and the ends of the two connecting rods (217) away from the transmission plate (214) are rotatably arranged on both ends of the corresponding pin shaft (216); a sensor group (224) is arranged in the middle of each pin shaft (216) for collecting peripheral wind sand flow data.

4. The wind section sand dust concentration and wind speed testing device for strong wind sand according to claim 3, wherein: a protective cover is further arranged on each pin shaft (216) for protecting the corresponding sensor group (224), the protective cover comprises a cover shell (221) fixed between the two connecting rods (217) and arranged on the periphery of the sensor group (224); and a through slot (222) is annularly arranged on the cover shell (221) and corresponds to the detection end of the sensor group (224), when the cover shell (221) is gradually rotated relative to the sensor group (224), the plurality of through slots (222) are used for exposing the detection end of the sensor group (224).

5. The wind section sand dust concentration and wind speed testing device for strong wind sand according to claim 4, wherein: The inner wall of the cover (221) is also annularly provided with cleaning cotton (223) distributed at intervals with the through grooves (222), and when the cover (221) is rotated relative to the sensor group (224) step by step, the cleaning cotton (223) is used for cleaning the detection end of the sensor group (224).

6. The strong wind sand wind section sand dust concentration and wind speed testing device according to claim 2, wherein: The anti-sand net cover mechanism is provided with two groups and is symmetrically distributed on both sides of the assembly plate (113), each anti-sand net cover mechanism includes a horizontal rod (311) fixed on one side of the assembly plate (113), an assembly rod (312) fixed on the outer side end of the horizontal rod (311), and the assembly rod (312) is provided with a sliding rod (313) at both ends of the bottom; and a transmission member (314) sleeved between the two sliding rods (313), and the transmission member (314) is provided with a dust side net assembly on the inner side of the assembly rod (312), and the outer sides of the two are connected with the pull rope transmission assembly, when the pull rope transmission assembly drives the transmission member (314) to move close to and away from the position of the assembly rod (312), the dust side net assembly is adapted to shrink inward and expand outward.

7. The strong wind sand wind section sand dust concentration and wind speed testing device according to claim 6, wherein: The dust side net assembly includes a plurality of transmission sleeves (315) sleeved on each sliding rod (313), wherein the two transmission sleeves (315) at the bottom are fixed at both ends of the transmission member (314), and the two transmission sleeves (315) at the top are fixed with the assembly rod (312); an installation frame (316) fixed on the inner side of each transmission sleeve (315); and two transmission bars (317) rotatably installed in each installation frame (316) through a third rotating shaft, and each transmission bar (317) is close to and crosses with the adjacent transmission bar (317); also includes a horizontal axis (318) penetrating through the intersection of the two groups of horizontally distributed transmission bars (317), a net surface (322) fixed on the inner side of the plurality of horizontal axes (318), and the net surface (322) extends downward at the bottom and is fixed with the transmission member (314); a plurality of groups of horizontally distributed two horizontal axes (318) are also respectively fixed with a net line (323) at both ends, wherein the two groups of net lines (323) distributed in front and back and the two net surfaces (322) together constitute a rectangular protection area.

8. The strong wind sand wind section sand dust concentration and wind speed testing device according to claim 7, wherein: Each horizontal axis (318) is also provided with a plurality of first sensors (321) on the outer side.

9. The strong wind sand wind section sand dust concentration and wind speed testing device according to claim 6, wherein: Each group of pull rope transmission assemblies includes a fixed sleeve (319) and a movable sleeve (3191) fixed in the middle of the transmission member (314) and the assembly rod (312) respectively; and a first mounting seat (324) provided on the top of the assembly rod (312), the first mounting seat (324) is rotatably installed with a first positioning wheel (325) in the middle; Also include a second mounting seat (218) fixed on the top of the assembly plate (113), the second mounting seat (218) is provided with a second positioning wheel (219) inside; A base (114) fixed on one end of the base plate (111), the surface of the base (114) is fixed with a motor (115), and a winding roller (116) fixed with the output end of the motor (115); And a rope body (117) fixed on the winding roller (116), wherein one end of the rope body (117) away from the winding roller (116) passes through a fixed sleeve (319), a movable sleeve (3191), a first positioning wheel (325), a second positioning wheel (219) in sequence and is fixed with a transmission plate (214) placed on the top, and the rope body (117) is fixed with the fixed sleeve (319); Also include a first spring (320) and a second spring (220), wherein the first spring (320) is arranged on the outer wall of the rope body (117) between the fixed sleeve (319) and the movable sleeve (3191), and the second spring (220) is arranged on the outer wall of the rope body (117) between the transmission plate (214) placed on the top and the assembly plate (113).

10. The strong wind sand and dust concentration and wind speed testing device according to claim 2, characterized in that: The top of the assembly plate (113) is also provided with a second sensor (411).

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