Snow flux measuring method using a snow bag with a screen

Abstract

A snow flux measuring method using a screen snow bag belongs to the technical field of wind-blowing snow flux measuring equipment. The present application solves the problem that the existing measuring device is difficult to deploy and difficult to collect different wind direction blowing snow particles. The snow flux measuring method using the screen snow bag is used to calculate the snow flux, and the blowing snow particles are captured by the multi-wind-direction snow catcher and the single-wind-direction snow catcher. The multi-wind-direction snow catcher includes a first mounting frame, a plurality of first fixing devices and a plurality of first snow catching devices. The single-wind-direction snow catcher includes a second mounting frame, a plurality of second fixing devices and a plurality of second snow catching devices. The first snow catching device is movably connected to the first mounting frame through the first fixing device, and the second snow catching device is movably connected to the second mounting frame through the second fixing device. The present application can accurately predict the blowing snow disaster, quickly collect data, improve the accuracy of the measurement results, and reduce the influence of wind speed on the measurement results.

Description

TECHNICAL FIELD

[0001] The present application relates to a snow flux measurement method using a sieve net snow bag, belonging to the technical field of wind-blown snow flux measurement equipment. BACKGROUND

[0002] Wind-blown snow refers to the process of ground snow or sky snow migrating with wind and re-accumulating under the action of near-ground wind. Wind-blown snow is widely distributed and extremely prone to disaster. Wind-blown snow can cause traffic congestion, building collapse, and snow cornice formation leading to snow avalanches. Therefore, it is of great significance to study the physical process and snow transport mechanism of wind-blown snow for preventing and controlling wind-blown snow disasters.

[0003] Wind-blown snow mass flux is a key parameter representing the intensity of wind-blown snow transport, representing the mass of snow particles per unit area per unit time. It is crucial for predicting and evaluating wind-blown snow disasters. Currently, the mass flux of wind-blown snow is mainly studied through outdoor measurement. The existing measurement method uses a photoelectric particle counter or a mechanical snow-catching device to identify and capture blown snow particles, thereby obtaining the relationship between wind speed and snow transport mass. However, the harsh environment of low temperature and strong wind in winter brings great inconvenience to the operation of experimenters; the wind resistance or backflow generated by the measurement device reduces the snow collection efficiency; and the change of natural wind direction changes the direction of blown snow inflow, and the existing measurement device cannot collect blown snow particles of different wind directions. SUMMARY

[0004] The present application is to solve the above problems, and further provides a snow flux measurement method using a sieve net snow bag.

[0005] A snow flux measurement method using a sieve net snow bag, specifically comprising the following steps:

[0006] Step one: arranging a single wind direction snow catcher and a multi-direction snow catcher in the measurement field, the opening of the snow catcher bag of the single wind direction snow catcher facing the main inflow direction, the center height of the snow catcher bag of the single wind direction snow catcher being h1, h2,..h i ,...h j , adjusting the height of the disc of the multi-direction snow catcher so that the center height of each snow catcher bag of the multi-direction snow catcher is consistent with the center height h i of one of the snow catcher bags of the single wind direction snow catcher, and adjusting the direction of the snow catcher bag of the multi-direction snow catcher so that the opening of any snow catcher bag faces the main inflow direction;

[0007] Step two: measuring the mass of all snow catcher bags in the snow-free state, and installing the snow catcher bags on the snow catcher to collect blown snow particles;

[0008] Step three: after one measurement, collect the snow particles in each snow bag and weigh them, and the mass of the snow particles collected in each snow bag is the mass of the snow state minus the mass of the snow-free state, assuming that the mass of the snow collected in each snow bag of the single wind direction snow catcher is m h1 ,m h2 ,....,m hi ,....,m hj , where h1, h2,..h i ,...h j is the height of the snow bag center from the ground, and the mass of the snow collected in each snow bag of the multi-direction snow catcher is m d0 ,m d1 ,...,m dp ,....,m dq， , where d0, d1,..d p ,...d q is the angle between the direction of the snow bag and the main flow direction, and d0 represents the angle between the snow bag and the main flow direction being zero.

[0009] Step four: empty each snow bag and measure the mass of each snow bag in the snow-free state, install the snow bag on the snow catcher, adjust the direction of the snow catcher to the main flow direction, and start the next measurement.

[0010] Under the current measurement, the snow flux at the angle dp from the main flow direction and the height h k from the ground is calculated by the following formula: , where A is the opening area of the snow bag, and t is the holding time of the current measurement.

[0011] Further, the multi-direction snow catcher comprises a first mounting frame, a plurality of first fixing devices and a plurality of first snow catching devices, the first mounting frame comprises a first bottom plate and a first mounting steel pipe, the first mounting steel pipe is welded at the center position of the first bottom plate in the vertical direction, and the first snow catching device is inserted and mounted on the first mounting frame through the first fixing device.

[0012] Further, the first snow catching device comprises a first rectangular frame, a first snow bag and a first snow catching steel pipe, the first snow bag is bonded to the first rectangular frame, the lower surface of one end of the first snow catching steel pipe is welded to the upper surface of the long side of the first rectangular frame, the bag opening of the first snow bag faces away from the disc, and the other end of the first snow catching steel pipe is inserted into the first fixing device.

[0013] Further, the first fixing device comprises a disc, a square buckle and a plurality of first fixing steel pipes, the disc is sleeved outside the first installation steel pipe, the pipe diameter of the square buckle is larger than that of the first installation steel pipe, the square buckle is sleeved outside the first installation steel pipe and welded on the upper surface of the disc, a plurality of sides of the square buckle are drilled and screwed and connected outside the first installation steel pipe through bolts, one end of the plurality of first fixing steel pipes is welded on the lower surface of the disc along the same interval in the circumferential direction, and the other end of the first fixing steel pipe is inserted into the corresponding first snow catching steel pipe and connected through bolts.

[0014] Further, the first snow catching bag is processed by using a 100-mesh nylon screen, the opening of the first snow catching bag is larger than the first rectangular frame, and the upper surface of the first rectangular frame is welded with a first U-shaped framework.

[0015] Further, the single wind direction snow catcher comprises a second installation frame, a plurality of second fixing devices and a plurality of second snow catching devices, the second installation frame comprises a second bottom plate and a second installation steel pipe, the second installation steel pipe is welded on the center position of the second bottom plate in the vertical direction, and the second snow catching device is inserted and mounted on the second installation frame through the second fixing device.

[0016] Further, the second snow catching device comprises a second rectangular frame, a second snow catching bag and a second snow catching steel pipe, the second snow catching bag is bonded to the second rectangular frame, the end face of one end of the second snow catching steel pipe is welded outside the short side of the second rectangular frame, and the other end of the second snow catching steel pipe is inserted into the second fixing device.

[0017] Further, the second fixing device comprises a plurality of tiger clamps and a plurality of second fixing steel pipes, the plurality of tiger clamps are connected on the same side of the second installation steel pipe through bolts, one end of the second fixing steel pipe is welded on the side of the tiger clamp away from the bolt, and the other end of the second fixing steel pipe is inserted into the corresponding second snow catching steel pipe and connected through bolts.

[0018] Further, the second snow catching bag is processed by using a 100-mesh nylon screen, the opening of the second snow catching bag is larger than the second rectangular frame, and the upper surface of the second rectangular frame is welded with a second U-shaped framework.

[0019] Compared with the prior art, the present application has the following effects:

[0020] The snow flux measurement method using the screen snow catching bag can calculate and evaluate the snow flux at different heights and different wind directions by combining the data of the measured blown snow particles with the formula, so that the blown snow disaster can be accurately predicted and evaluated.

[0021] The snow flux measuring method with the screen snow catching bag is easy to deploy and install, and can be applied to various complex environments; the operation is simple, the difficulty of outdoor measurement is reduced, and in addition, the data of the personnel can be quickly collected, and the work efficiency is improved;

[0022] The snow flux measuring method with the screen snow catching bag adopts the snow catching bag to catch snow particles, the screen snow catching bag has a large scattering area, can effectively ventilate to reduce the resistance to the incoming flow, and avoids the reduction of the snow catching efficiency and the distortion of the measurement results caused by backflow and wind blocking;

[0023] Compared with the snow flux measuring instrument adopting a wind vane combined with a rotating base, the device can collect snow particles under multiple wind directions without wind power, and the measurement result is less affected by the wind speed. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a perspective view of the multi-directional snow catching instrument in the application;

[0025] Figure 2 is an exploded view of the multi-directional snow catching instrument in the application;

[0026] Figure 3 is a perspective view of the first fixing device of the multi-directional snow catching instrument in the application;

[0027] Figure 4 is a perspective view of the first snow catching device of the multi-directional snow catching instrument in the application;

[0028] Figure 5 is a perspective view of the single-directional snow catching instrument in the application;

[0029] Figure 6 is an exploded view of the single-directional snow catching instrument in the application;

[0030] Figure 7 is a perspective view of the second fixing device of the single-directional snow catching instrument in the application;

[0031] Figure 8 is a perspective view of the second snow catching device of the single-directional snow catching instrument in the application;

[0032] Wherein: 1-first bottom plate, 2-first installation steel pipe, 3-square buckle, 4-disc, 5-first fixed steel pipe, 6-tiger card, 7-first rectangular frame, 8-first snow catching bag, 9-first U-shaped framework, 10-first snow catching steel pipe, 11-second snow catching steel pipe, 12-second fixed steel pipe, 13-second rectangular frame, 14-second snow catching bag, 15-second U-shaped framework, 16-second bottom plate, 17-second installation steel pipe. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0034] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] Referring to the description of the drawings, a snow flux measurement method using a screen snow catching bag specifically includes the following steps:

[0036] Step one: arranging single wind direction snow catcher and multi wind direction snow catcher in the measurement field, the opening of the snow catching bag of the single wind direction snow catcher is directed to the main incoming flow direction, the center height of the snow catching bag of the single wind direction snow catcher from the snow surface is h1, h2,..h i ,...h j , adjusting the height of the disc 4 of the multi wind direction snow catcher so that the center height of each snow catching bag of the multi wind direction snow catcher is consistent with the center height h i of one snow catching bag of the single wind direction snow catcher, and adjusting the direction of the snow catching bag of the multi wind direction snow catcher so that the opening of any snow catching bag is directed to the main incoming flow direction;

[0037] Step two: measuring the mass of all snow catching bags in the snow-free state, and installing the snow catching bags to the snow catcher to collect the snow particles;

[0038] Step three: after completing one measurement, collecting the snow particles in each snow catching bag and weighing, the mass of each snow catching bag in the snow state minus the mass of each snow catching bag in the snow-free state is the mass of the collected snow particles in one measurement, assuming that the mass of the collected snow particles in each snow catching bag of the single wind direction snow catcher is mh1 ,m h2 ,....,m hi ,....,m hj ,....,m i ,...h j is the height of the center of the snow bag from the ground, and the snow mass collected by each snow bag of the multi-directional snow catcher is m d0 ,m d1 ,...,m dp ,....,m dq， ,....,m p ,...d q is the angle between the direction of the snow bag and the main flow direction, and d0 represents that the angle between the snow bag and the main flow direction is zero;

[0039] Step four: empty each snow bag, measure the mass of each snow bag in the snow-free state, install the snow bag on the snow catcher, adjust the direction of the snow catcher to the main flow direction, and start the next measurement;

[0040] The snow flux at the height of h k from the ground and the angle of dp from the main flow direction in the current measurement is calculated by the following formula: where A is the opening area of the snow bag, and t is the holding time of the current measurement.

[0041] The snow flux measurement method using a screen snow bag can accurately predict and evaluate snow disaster by calculating and evaluating the snow flux at different heights and different wind directions based on the measured data of snow particles combined with the formula. The single-directional snow catcher and the multi-directional snow catcher used in the snow flux measurement method are easy to deploy and install, and can be applied to various complex environments. The operation is simple, which reduces the difficulty of outdoor measurement. In addition, it is convenient for the measurement personnel to quickly collect data and improve the work efficiency. The snow flux measurement method using a screen snow bag uses a snow bag to capture snow particles, and the screen snow bag has a large flow area, which can effectively ventilate to reduce the resistance to the flow, avoid the reduction of snow capture efficiency and distortion of measurement results caused by backflow and wind blocking. The multi-directional snow catcher in the snow flux measurement method using a screen snow bag collects snow particles at different wind directions by setting multiple snow bags in different directions. Compared with the snow flux measurement instrument using a wind vane combined with a rotating base, the present application can collect snow particles at multiple wind directions without wind power, and the measurement result is less affected by wind speed.

[0042] The multi-wind-direction snow catcher comprises a first mounting frame, a plurality of first fixing devices and a plurality of first snow catching devices, the first mounting frame comprises a first bottom plate 1 and a first mounting steel pipe 2, the first mounting steel pipe 2 is welded at the center position of the first bottom plate 1 in the vertical direction, and the first snow catching devices are inserted and mounted on the first mounting frame through the first fixing devices. Preferably, the first bottom plate 1 is chamfered around. The first mounting frame provides mounting positions for the plurality of first fixing devices and the plurality of first snow catching devices, the number of the first fixing devices corresponds to the number of the first snow catching devices, and the first snow catching devices are used for catching snow particles.

[0043] The first snow catching device comprises a first rectangular frame 7, a first snow catching bag 8 and a first snow catching steel pipe 10, the first snow catching bag 8 is bonded on the first rectangular frame 7, the lower surface of one end of the first snow catching steel pipe 10 is welded on the upper surface of the long side of the first rectangular frame 7, the bag opening of the first snow catching bag 8 is directed away from the disc 4, and the other end of the first snow catching steel pipe 10 is inserted into the first fixing device. The first snow catching bag 8 is used for collecting snow particles of different wind directions, the first rectangular frame 7 is used for keeping the bag opening of the first snow catching bag 8 open at all times, effectively reducing the wind resistance of the first snow catching bag 8, and further making the measured data more accurate, and the lower surface of the first snow catching steel pipe 10 is welded on the long side of the first rectangular frame 7, which facilitates the bag opening of the first snow catching bag 8 to be directed to any wind direction, thereby collecting snow particles of different wind directions and accurately measuring the snow particle flux.

[0044] The first fixing device comprises a disc 4, a square buckle 3 and a plurality of first fixing steel pipes 5, the disc 4 is sleeved outside the first mounting steel pipe 2, the pipe diameter of the square buckle 3 is larger than that of the first mounting steel pipe 2, the square buckle 3 is sleeved outside the first mounting steel pipe 2 and welded on the upper surface of the disc 4, a plurality of sides of the square buckle 3 are drilled and tapped and connected to the outside of the first mounting steel pipe 2 through bolts, one end of the plurality of first fixing steel pipes 5 is welded on the lower surface of the disc 4 in the same interval, the other end of the first fixing steel pipe 5 is inserted into the corresponding first snow catching steel pipe 10 and connected through bolts. Specifically, the square buckle 3 is processed from a thick-walled square steel pipe, the pipe diameter of the first fixing steel pipe 5 is slightly larger than that of the first snow catching steel pipe 10, which facilitates the insertion of the snow catching device into the first fixing steel pipe 5, the disc 4 provides space for the first fixing steel pipe 5, and the square buckle 3 realizes the fixation of the fixing device on the first mounting steel pipe 2 through bolts.

[0045] The first snow catching bag 8 is processed by using a 100-mesh nylon screen, the opening of the first snow catching bag 8 is larger than the first rectangular frame 7, the upper surface of the first rectangular frame 7 is welded with a first U-shaped framework 9. Specifically, the size of the first rectangular frame 7 is 10*5 cm. The opening of the first snow catching bag 8 is larger than the first rectangular frame 7, which facilitates the bonding of the first snow catching bag 8 on the first rectangular frame 7, the bonding operation is relatively simple, easy to deploy and install, and can reduce the difficulty of outdoor measurement. The snow catching bag processed by using a nylon screen can effectively ventilate to reduce the resistance to the incoming flow, improve the snow catching efficiency and the accuracy of the measurement results. Preferably, the first U-shaped framework 9 is bent by using a wire, the width of the first U-shaped framework 9 is matched with the first rectangular frame 7, thereby ensuring that the first snow catching bag 8 always maintains an unfolded state, effectively reducing the wind resistance of the first snow catching bag 8, and thereby improving the reliability of the measurement results.

[0046] The single-wind-direction snow catching instrument comprises a second mounting frame, a plurality of second fixing devices and a plurality of second snow catching devices. The second mounting frame comprises a second bottom plate 16 and a second mounting steel pipe 17, the second mounting steel pipe 17 is welded at the center of the second bottom plate 16 in the vertical direction, and the second snow catching device is inserted and mounted on the second mounting frame through the second fixing device. Preferably, the second bottom plate 16 is chamfered around. The second mounting frame provides mounting positions for the plurality of second fixing devices and the plurality of second snow catching devices. The number of second fixing devices corresponds to the number of second snow catching devices, and the blowing snow particles are captured by the second snow catching device.

[0047] The second snow catching device comprises a second rectangular frame 13, a second snow catching bag 14 and a second snow catching steel pipe 11. The second snow catching bag 14 is bonded on the second rectangular frame 13, the end face of one end of the second snow catching steel pipe 11 is welded on the outer side of the short side of the second rectangular frame 13, and the other end of the second snow catching steel pipe 11 is inserted and mounted in the second fixing device. The blowing snow particles at different heights are collected by the second snow catching bag 14, the second snow catching bag 14 always maintains an open state by the second rectangular frame 13, effectively reducing the wind resistance of the second snow catching bag 14, thereby making the measured data more accurate. By welding the end face of the second snow catching bag 14 on the outer side of the short side of the second rectangular frame 13, each second snow catching bag 14 can be vertically arranged along the main wind direction.

[0048] The second fixing device comprises a plurality of tiger cards 6 and a plurality of second fixing steel pipes 12, the plurality of tiger cards 6 are connected on the same side of the second installation steel pipe 17 by bolts, one end of the second fixing steel pipe 12 is welded on the side of the tiger card 6 away from the bolt, the other end of the second fixing steel pipe 12 is inserted into the corresponding second snow catching steel pipe 11 and connected by bolts. The second fixing steel pipe 12 is fixed on the second installation steel pipe 17 through the tiger card 6, specifically, the pipe diameter size of the second fixing steel pipe 12 is slightly larger than the pipe diameter size of the second snow catching steel pipe 11, which facilitates the snow catching device to be inserted into the second fixing steel pipe 12, facilitates the data collection of the field measurement personnel, and improves the work efficiency.

[0049] The second snow catching bag 14 is processed by a 100-mesh nylon screen, the opening of the second snow catching bag 14 is larger than the second rectangular frame 13, and the upper surface of the second rectangular frame 13 is welded with the second U-shaped framework 15. Specifically, the size of the second rectangular frame 13 is 10*5 cm. The opening of the second snow catching bag 14 is larger than the second rectangular frame 13, which facilitates the bonding of the second snow catching bag 14 on the second rectangular frame 13, the bonding operation is relatively simple, easy to deploy and install, can reduce the difficulty of outdoor measurement, the snow catching bag processed by the nylon screen can effectively ventilate to reduce the resistance to the incoming flow, improve the snow catching efficiency and the accuracy of the measurement result, preferably, the second U-shaped framework 15 is bent by an iron wire, the width of the second U-shaped framework 15 is matched with the second rectangular frame 13, thereby ensuring that the second snow catching bag 14 always maintains an unfolded state, effectively reduces the wind resistance of the second snow catching bag 14, and thereby improves the reliability of the measurement result.

[0050] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A snow flux measuring method using a snow-bag with a screen, characterized by, The method comprises the following steps: Step one: arrange single-wind-direction snow catcher and multi-wind-direction snow catcher in the actual field, the opening of the snow catcher bag of the single-wind-direction snow catcher faces the main incoming flow direction, the center of the snow catcher bag of the single-wind-direction snow catcher is at a height of h1, h2,..h i ,...h j , adjust the height of the disc (4) of the multi-wind-direction snow catcher so that the center height of each snow catcher bag of the multi-wind-direction snow catcher is consistent with that of one snow catcher bag of the single-wind-direction snow catcher h i , and adjust the direction of the snow catcher bag of the multi-wind-direction snow catcher so that the opening of any snow catcher bag faces the main incoming flow direction; Step 2: Measure the mass of all snow bags in the snow-free state, and install the snow bags on the snow catcher to collect the snow particles; Step three: After one measurement, collect the snow particles in each snow bag and weigh them, the mass of each snow bag with snow minus the mass of each snow bag without snow is the mass of snow collected in one measurement, assuming that the mass of snow collected in each snow bag of the single wind direction snow catcher is m h1 ,m h2 ,....,m hi ,....,m hj , where h1, h2,..h i ,...h j is the height of the center of the snow bag from the ground, and the mass of snow collected in each snow bag of the multi-direction snow catcher is m d0 ,m d1 ,...,m dp ,....,m dq , where d0, d1,..d p ,...d q is the angle between the direction of the snow bag and the main flow direction, d0 represents the angle between the snow bag and the main flow direction is zero; Step 4: Empty each snow bag, measure the mass of each snow bag in the snow-free state, install the snow bag on the snow catcher, adjust the direction of the snow catcher to the main flow direction, and start the next measurement; The blowing snow flux at the current measured time, with the included angle between the main flow direction and the ground surface being dp and the height from the ground surface being h k is calculated by the following formula: wherein A is the opening area of the snow catching bag, and t is the current measured holding time.

2. The snow flux measuring method using a snow catching bag with a screen according to claim 1, characterized by: The multi-wind-direction snow catcher comprises a first mounting frame, a plurality of first fixing devices and a plurality of first snow catching devices, the first mounting frame comprises a first bottom plate (1) and a first mounting steel pipe (2), the first mounting steel pipe (2) is welded at the center position of the first bottom plate (1) in the vertical direction, and the first snow catching device is inserted and mounted on the first mounting frame through the first fixing device.

3. The snow flux measuring method using a snow catching bag with a screen according to claim 2, characterized in that: The first snow catching device comprises a first rectangular frame (7), a first snow bag (8) and a first snow catching steel pipe (10), the first snow bag (8) is bonded to the first rectangular frame (7), the lower surface of one end of the first snow catching steel pipe (10) is welded to the upper surface of the long side of the first rectangular frame (7), the bag opening of the first snow bag (8) faces away from the disc (4), and the other end of the first snow catching steel pipe (10) is inserted into the first fixing device.

4. The snow flux measuring method using a snow catching bag with a screen according to claim 2, characterized in that: The first fixing device comprises a disc (4), a square buckle (3) and a plurality of first fixing steel pipes (5), the disc (4) is sleeved outside the first mounting steel pipe (2), the pipe diameter of the square buckle (3) is greater than that of the first mounting steel pipe (2), the square buckle (3) is sleeved outside the first mounting steel pipe (2) and welded to the upper surface of the disc (4), a plurality of sides of the square buckle (3) are drilled and tapped and connected to the outside of the first mounting steel pipe (2) through bolts, and one end of the plurality of first fixing steel pipes (5) is welded to the lower surface of the disc (4) in the same interval in the circumferential direction, the other end of the first fixing steel pipe (5) is inserted into the corresponding first snow catching steel pipe (10), and the other end is connected through a bolt.

5. The snow flux measuring method using a snow catching bag with a screen according to claim 3, characterized in that: The first snow bag (8) is processed by using a 100-mesh nylon screen, the opening of the first snow bag (8) is larger than the first rectangular frame (7), and the upper surface of the first rectangular frame (7) is welded with a first U-shaped skeleton (9).

6. The snow flux measurement method using a snow-bag with a screen according to claim 1, characterized in that: The single-wind-direction snow catcher comprises a second mounting frame, a plurality of second fixing devices and a plurality of second snow catching devices, the second mounting frame comprises a second bottom plate (16) and a second mounting steel pipe (17), the second mounting steel pipe (17) is welded at the center position of the second bottom plate (16) in the vertical direction, and the second snow catching device is inserted and mounted on the second mounting frame through the second fixing device.

7. The snow flux measuring method using a snow-trap with a screen according to claim 6, characterized in that: The second snow catching device comprises a second rectangular frame (13), a second snow bag (14) and a second snow catching steel pipe (11), the second snow bag (14) is bonded to the second rectangular frame (13), and the end face of one end of the second snow catching steel pipe (11) is welded to the outside of the short side of the rectangular frame; the other end of the second snow catching steel pipe (11) is inserted into the second fixing device.

8. The snow flux measuring method using a snow catching bag with a screen according to claim 6, characterized by: The second fixing device comprises a plurality of tiger cards (6) and a plurality of second fixing steel pipes (12), the plurality of tiger cards (6) are connected on the same side of the second installation steel pipe (17) through bolts, one end of the second fixing steel pipe (12) is welded on the side of the tiger card (6) away from the bolt, and the other end of the second fixing steel pipe (12) is inserted into the corresponding second snow catching steel pipe (11) and connected through a bolt.

9. The snow flux measuring method using a snow-trap with a screen according to claim 7, characterized by: The second snow catching bag (14) is processed by using a 100-mesh nylon screen, the opening of the second snow catching bag (14) is larger than the second rectangular frame (13), and the upper surface of the second rectangular frame (13) is welded with the second U-shaped framework (15).

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