CN219830260U

CN219830260U - Portable artificial rainfall-wind tunnel test device vehicle

Info

Publication number: CN219830260U
Application number: CN202320707355.9U
Authority: CN
Inventors: 侯仁杰; 付强; 冷旭; 李天霄
Original assignee: Northeast Agricultural University
Current assignee: Northeast Agricultural University
Priority date: 2023-04-03
Filing date: 2023-04-03
Publication date: 2023-10-13
Anticipated expiration: 2033-04-03

Abstract

The utility model discloses a portable artificial rainfall-wind tunnel test device vehicle, which comprises a vehicle body component, an artificial rainfall mechanism, a wind tunnel simulation mechanism, a sand production collection mechanism, a collection drainage mechanism and a data acquisition mechanism, wherein the vehicle body component consists of a vehicle body and wheels, the wheels are fixedly connected to the bottom of the vehicle body, a test cabin is arranged in the vehicle body, the left side and the right side of the test cabin are both open structures, a soil tank box body is arranged in the test cabin, the wind tunnel simulation mechanism is arranged on the left side of the test cabin, the sand production collection mechanism is arranged on the right side of the outside of the test cabin and is connected with the open structures, the artificial rainfall mechanism is arranged on the upper side of the test cabin, and the collection drainage mechanism is arranged on the bottom side of the inside of the test cabin. The portable artificial rainfall-wind tunnel test device vehicle is easy to obtain equipment, convenient to assemble and high in operation automation level, can simulate the cooperative effect of wind and rain, and solves the problems in the prior art.

Description

Portable artificial rainfall-wind tunnel test device vehicle

Technical Field

The utility model relates to the technical field of model test devices, in particular to a portable artificial rainfall-wind tunnel test device vehicle.

Background

Soil erosion is one of the most common forms of soil degradation, which destroys natural resources, threatening the sustainable development of human society. Wind erosion and water erosion are two major types of soil erosion, and are generally studied as separate erosion processes. In fact, in most areas, especially in arid and semiarid areas, wind and water erosion coexist, they occur simultaneously or alternately, and superimposed external forces cause greater erosion. At present, the research on soil erosion caused by wind and water mainly relates to the aspects of synergistic effect, respective contribution and the like, and the research on wind-water composite erosion and sediment conveying process is lacking. In addition, the in-situ observation requires a great deal of time, manpower and material resources, so that the research on the composite erosion characteristics is seriously hindered, and the portable simulation device can effectively solve the problems, and is more helpful for revealing the characteristics and the influence.

The simulated rainfall-wind tunnel device is a test device for simulating natural rainfall and wind-scraping processes through artificial conditions, is mostly unfolded indoors, is used for realizing the rainfall and wind-scraping processes with different intensities and durations and different wind speeds, and is used for carrying out related tests according to the simulated rainfall and wind-scraping processes. However, although the conventional equipment can regulate and control key parameters such as rain intensity, wind speed and the like, the simulation device only aims at a single action of the equipment, the synergistic effect of wind and rain is ignored, meanwhile, the equipment is generally large in size and fixed in place, so that the test cannot be performed anytime and anywhere. Therefore, the utility model provides the portable artificial rainfall-wind tunnel device vehicle which can simultaneously perform rainfall and wind blowing and can adjust the gradient and the slope direction.

Disclosure of Invention

The utility model aims to provide a portable artificial rainfall-wind tunnel test device vehicle, which has the advantages of easily available equipment, convenient assembly and high operation automation level, can simulate the cooperative effect of wind and rain, and solves the problems in the prior art.

In order to achieve the above purpose, the utility model provides a portable artificial rainfall-wind tunnel test device vehicle, which comprises a vehicle body component, an artificial rainfall mechanism, a wind tunnel simulation mechanism, a sand production collection mechanism, a collection drainage mechanism and a data acquisition mechanism, wherein the vehicle body component consists of a vehicle body and wheels, the wheels are fixedly connected to the bottom of the vehicle body, a test cabin is arranged in the vehicle body, the left side and the right side of the test cabin are both of an opening structure, a soil tank box body is arranged in the test cabin, the wind tunnel simulation mechanism is arranged on the left side in the test cabin, the sand production collection mechanism is arranged on the right side outside the test cabin and is connected with the opening structure, the artificial rainfall mechanism is arranged on the upper side of the test cabin, the collection drainage mechanism is arranged on the bottom side inside the test cabin and is positioned on the lower side of the soil tank box body, and the artificial rainfall mechanism and the wind tunnel simulation mechanism are electrically connected with the data acquisition mechanism.

Preferably, the skeleton of the body adopts galvanized angle steel frames, the top and the bottom of the body adopt galvanized steel plates, the front and the rear wall plates of the body adopt organic glass plates, the organic glass plates are connected with the angle steel frames by rivets, the galvanized steel plates are connected with the angle steel frames by welding, the adjacent galvanized steel plates are sealed by glass cement, the organic glass plates and the organic glass plates are connected with the galvanized steel plates by rivets, rubber sealing strips are arranged at joints, and the wheels are connected with the body by rivets.

Preferably, a door made of an organic glass plate is reserved in the middle of the front side of the test cabin, a handle is arranged on one side of the door, the door is connected to a door frame through a galvanized steel hinge, the door frame is made of galvanized angle steel, the organic glass plate is connected with the door frame through rivets, and sealing strips are adhered to the periphery of the door.

Preferably, the artificial rainfall mechanism comprises a water supply tank, a variable-frequency speed-regulating water pump, a water injection pipe, an attaching frame, a flow control valve and a spray head, wherein the water supply tank is arranged on one side of the outside of the test cabin, the spray head is arranged on the top side of the inside of the test cabin, the spray head is connected with the water supply tank through the water injection pipe, the water injection pipe is connected with a vehicle body through the attaching frame, and one end of the water injection pipe, which is close to the water supply tank, is sequentially provided with the variable-frequency speed-regulating water pump and the flow control valve.

Preferably, the spray heads are provided with a plurality of spray heads, the apertures of the spray heads are different, the aperture range of the spray heads is 1-6mm, each spray head is connected with the water injection pipe through a spray head branch pipe, and the spray head branch pipe is provided with a self-closing valve.

Preferably, the wind tunnel simulation mechanism comprises a fan, a motor, a bracket and a honeycomb diffuser, wherein the honeycomb diffuser is arranged at the left side of the inside of the test cabin, the fan is arranged at one side of the honeycomb diffuser away from the soil tank body, the fan is connected with an output shaft of the motor, and the motor is connected with the inner wall of the test cabin through the bracket.

Preferably, produce sand and collect the mechanism and be equipped with a plurality ofly, a plurality of sand and collect the mechanism and set gradually on the outside right side of test cabin from supreme down, produce sand and collect the mechanism and include into sand mouth, separation blade and sand storage bag, advance the entry of sand mouth and be connected with the open structure department of test cabin, and sand storage bag dismantles to be connected at the export side of advancing sand mouth, and the exit of advancing sand mouth still rotates through the pivot and is connected with the separation blade.

Preferably, the data acquisition mechanism comprises a wind speed measuring instrument, a rainfall sensor, an acquisition cable, a display and a communication controller, wherein the wind speed measuring instrument is fixedly connected right above the middle part in the test cabin, the rainfall sensor is arranged at the bottom in the test cabin, the wind speed measuring instrument and the rainfall sensor are connected with the display and the communication controller through the acquisition cable, and the display is connected to the upper side of the communication controller.

Preferably, the collecting and draining mechanism comprises a water collecting tank, a drain pipe, a manual valve and a waste liquid barrel, wherein the water collecting tank is arranged at the bottom in the test cabin and is positioned at the lower side of the soil tank body, the waste liquid barrel is arranged at the outer side of the vehicle body, the drain pipe is connected with the water collecting tank and extends to the upper side of the waste liquid barrel, and the manual valve is arranged on the drain pipe.

The utility model has the beneficial effects that:

(1) The device is easy to obtain, convenient to assemble, novel in structural design, low in cost, controllable in parameter display and high in operation automation level, can perform artificial rainfall test and wind tunnel simulation test, and can simulate the cooperative effect of wind and rain.

(2) Erosion sand production research under the alternate actions of wind power and water power with different intensities can be realized, and the characteristic law of water and soil loss under the coupling actions of multiple factors such as rainfall intensity, wind speed, duration and the like can be obtained through data arrangement and analysis, so that the method is simple and convenient, is convenient to use and is easy to realize.

The technical scheme of the utility model is further described in detail through the drawings and the embodiments.

Drawings

FIG. 1 is a schematic illustration of an embodiment of a portable artificial rainfall-wind tunnel test rig cart of the present utility model;

FIG. 2 is a schematic diagram of a portable artificial rainfall-wind tunnel test device vehicle produced sand collection mechanism of the present utility model.

Reference numerals:

1. a body component; 11. a vehicle body; 12. a wheel; 13. a door; 14. a handle; 15. a door frame; 16. a test cabin; 2. an artificial rainfall mechanism; 21. a water supply tank; 22. variable-frequency speed-regulating water pump; 23. a water injection pipe; 24. an attachment frame; 25. a flow control valve; 26. a spray head; 27. a shower nozzle branch pipe; 28. a self-closing valve; 3. a wind tunnel simulation mechanism; 31. a fan; 32. a motor; 33. a bracket; 34. a honeycomb diffuser; 4. a sand production collection mechanism; 41. a sand inlet; 42. a baffle; 43. a sand storage bag; 5. a collecting and draining mechanism; 51. a water collection tank; 52. a drain pipe; 53. a manual valve; 54. a waste liquid barrel; 6. a data acquisition mechanism; 61. wind speed measuring instrument; 62. a rainfall sensor; 63. collecting cables; 64. a display; 65. a communication controller; 7. a soil tank body.

Detailed Description

The utility model will be further described with reference to examples.

Examples

Referring to fig. 1 to 2, as shown in the drawings, the utility model provides a portable artificial rainfall-wind tunnel test device vehicle, which comprises a vehicle body component 1, an artificial rainfall mechanism 2, a wind tunnel simulation mechanism 3, a sand production collection mechanism 4, a collection drainage mechanism 5 and a data collection mechanism 6, wherein the artificial rainfall mechanism 2 can realize a rainfall mode, the rainfall can be controlled, the wind tunnel simulation mechanism 3 can realize a wind-scraping mode, and the cooperative effect of wind and rain can be realized through the mutual cooperation of rainfall of the artificial rainfall mechanism 2 and wind scraping of the wind tunnel simulation mechanism 3.

Wherein, body assembly 1 comprises automobile body 11 and wheel 12, and the skeleton of automobile body 11 all adopts galvanized angle steel frame, and the top and the bottom of automobile body 11 adopt galvanized steel sheet, guarantee that it has sufficient intensity and stability. The front and rear wall panels of the body 11 are made of organic glass plates, ensuring good observability. The organic glass plates are connected with the angle steel frames through rivets, the galvanized steel plates are connected with the angle steel frames through welding, and the adjacent galvanized steel plates are sealed through glass cement, and rubber sealing strips are arranged at joints, so that the tightness of the test cabin 16 is guaranteed. The wheels 12 are fixedly connected to the bottom of the vehicle body 11, the wheels 12 are connected with the vehicle body 11 through rivets, and the wheels 12 support the vehicle body 11 and facilitate movement of the vehicle body 11.

The middle part of the front side of the test cabin 16 is reserved with a door 13 made of an organic glass plate, and one side of the door 13 is provided with a handle 14, so that the door 13 is opened and closed conveniently, and further the test soil sample can be stored and taken conveniently. The door 13 is connected with the door frame 15 through galvanized steel hinges, the door frame 15 is made of galvanized angle steel, the organic glass plate is connected with the door frame 15 through rivets, and sealing strips are adhered to the periphery of the door 13.

The inside of automobile body 11 is equipped with test cabin 16, and the left and right sides of test cabin 16 is open structure to make things convenient for air inlet and air-out. The inside of the test cabin 16 is provided with a soil tank body 7 for placing a test soil sample, and the bottom of the soil tank body 7 is provided with a plurality of water leakage holes for simulating the soil water seepage effect.

The artificial rainfall mechanism 2 is arranged on the upper side of the test cabin 16, the artificial rainfall mechanism 2 comprises a water supply tank 21, a variable-frequency speed-regulating water pump 22, a water injection pipe 23, an adhesion frame 24, a flow control valve 25 and a spray head 26, the water supply tank 21 is arranged on one side of the outer part of the test cabin 16, and the water supply tank 21 is a high-density polyethylene plastic bucket, so that the artificial rainfall mechanism is light and portable. The shower nozzle 26 sets up in the inside top side of test cabin 16, and shower nozzle 26 is connected with supply tank 21 through water injection pipe 23, and water injection pipe 23 is connected with the automobile body through attaching frame 24, and water injection pipe 23 is the rigidity water pipe, comprises stainless steel seamless steel pipe, and water injection pipe 23 is fixed in the test cabin side through attaching frame 24 every 200mm to guarantee to draw water the module during operation, the stability of water injection pipe 23 is not influenced by passive water pressure.

The water injection pipe 23 is provided with a variable-frequency speed-regulating water pump 22 and a flow control valve 25 in sequence at one end close to the water supply tank 21. The variable-frequency speed-regulating water pump 22 pumps water from the water supply tank 21 and enters the spray head 26 through the water injection pipe 23 to realize rainfall. The flow control valve 25 is used to control the amount of artificial rainfall in the range of 0 to 200 mm/h.

The shower nozzles 26 are provided with a plurality of, and the aperture of a plurality of shower nozzles 26 is all different, and the aperture scope of shower nozzle 26 is 1-6mm, and every shower nozzle 26 all is connected with water injection pipe 23 through shower nozzle branch pipe 27, is equipped with self-closing valve 28 on the shower nozzle branch pipe 27. The spray nozzle 26 used can be freely changed according to the test requirements, so that the combination of the raindrops with multiple particle sizes in the real rainfall environment is realized, and the simulation authenticity is improved.

The wind tunnel simulation mechanism 3 sets up the left side in test chamber 16 inside, and wind tunnel simulation mechanism 3 includes fan 31, motor 32, support 33 and honeycomb diffuser 34, and honeycomb diffuser 34 sets up the inside in test chamber 16 and leans on left side, and fan 31 sets up the side that the soil box 7 was kept away from to honeycomb diffuser 34, and fan 31 and the output shaft of motor 32 are connected, and motor 32 passes through support 33 and is connected with the inner wall in test chamber 16. The fan 31 is started to rotate by the motor 32, air passes through the honeycomb diffuser 34 and enters the inner cavity of the test cabin 16 to blow out the test soil sample, so that simulation of wind erosion is realized.

The sand production collecting mechanism 4 is arranged on the right side of the outside of the test cabin 16 and is connected with the opening structure and used for receiving a test soil sample blown by simulated wind. The sand production collecting mechanisms 4 are arranged in a plurality, the sand production collecting mechanisms 4 are sequentially arranged on the right side outside the test cabin 16 from bottom to top, the sand production collecting mechanisms 4 are located at different heights, the height ranges of the sand production collecting mechanisms 4 are 0-10 cm, 10-20 cm, 20-30 cm, 30-40 cm, 40-50 cm, 50-60 cm, 60-70 cm, 70-80 cm, 80-90 cm and 90-100 cm, wind erosion substances at different heights are collected, and the sand production rate at different heights can be determined.

The sand producing and collecting mechanism 4 comprises a sand inlet 41, a baffle plate 42 and a sand storage bag 43, wherein the inlet of the sand inlet 41 is connected with the opening structure of the test cabin 16, and the size of the sand inlet 41 is matched with the opening structure size of the test cabin 16. The sand storage bag 43 is detachably connected to the outlet side of the sand inlet 41, the sand storage bag 43 is fixed to the sand inlet 41 through rubber bands and is used for collecting wind erosion products, the sand storage bag 43 is convenient to detach, and the amount of the wind erosion products collected by measurement is taken down. The exit of sand inlet 41 still rotates through the pivot and is connected with separation blade 42, and separation blade 42 can rotate under the blowing of wind-force, and separation blade 42 is blown by the wind, and the sand and dust of lifting can follow sand inlet 41 and get into in storing up sand bag 43, can prevent sand and dust backward flow.

The collecting and draining mechanism 5 is arranged at the bottom side of the inside of the test cabin 16 and is positioned at the lower side of the soil box body 7 and used for controlling the drainage of rainwater. The collecting and draining mechanism 5 comprises a water collecting tank 51, a drain pipe 52, a manual valve 53 and a waste liquid barrel 54, wherein the water collecting tank 51 is arranged at the bottom of the test cabin 16 and is positioned at the lower side of the soil tank body 7, the waste liquid barrel 54 is arranged at the outer side of the vehicle body, the drain pipe 52 is connected with the water collecting tank 51 and extends to the upper side of the waste liquid barrel 54, and the manual valve 53 is arranged on the drain pipe 52. Rainwater entering the test cabin 16 can be discharged out of the test cabin 16 through the water collecting tank 51 and the water discharging pipe 52 and is collected through the waste liquid barrel 54, so that the influence of excessive accumulated water in the test cabin 16 on simulation experiments is avoided.

The artificial rainfall mechanism 2 and the wind tunnel simulation mechanism 3 are electrically connected with the data acquisition mechanism 6. The data acquisition mechanism 6 comprises a wind speed measuring instrument 61, a rainfall sensor 62, an acquisition cable 63, a display 64 and a communication controller 65, wherein the wind speed measuring instrument 61 is fixedly connected to the middle part of the test cabin 16 and is used for measuring real-time wind speed. A rain sensor 62 is provided at the bottom of the test chamber 16 for measuring the intensity of the artificial rainfall. The wind speed measuring instrument 61 and the rain sensor 62 are connected to a display 64 and a communication controller 65 through a collection cable 63, and the display 64 is connected to the upper side of the communication controller 65. The display 64 receives the key parameters obtained by the sensor through the acquisition cable 63, the communication controller 65 controls the motor 32 and the flow control valve 25 through the integrated module according to the parameters such as real-time rain intensity, wind speed and the like provided by the display 64 and the requirements of test working conditions, controls the wind speed within 0-30 m/s through controlling the rotating speed of the fan, and adjusts the flow control valve 25 to control the rain intensity within 0-200 mm/h, so that automatic operation is realized. The self-closing valve 28 is also connected with the communication controller 65 through a cable, so as to control the opening and closing of the spray head 26.

The specific working principle is as follows:

the door 13 is opened through the handle 14, a test soil sample is placed in the soil tank body 7 in the test cabin 16, water required by the test is injected into the water supply tank 21, the water enters the water injection pipe 23 through the variable-frequency speed-regulating water pump 22, the water injection pipe 23 is fixed on the test cabin 16 through the attachment frame 24, and when water flows through the spray heads 26 with different apertures to form multi-particle-size artificial rainfall, the rainwater corrodes on the surface of the soil sample; by starting the fan 31 through the motor 32, air passes through the honeycomb diffuser 34 and enters the inner cavity of the test cabin 16 to blow out the test soil sample, meanwhile, the baffle plate 42 is blown up by wind, raised sand and dust can enter the sand storage bag 43 from the sand inlet 41, the baffle plate 42 plays a role in preventing the backflow of the sand and dust, and the sand storage bag 43 is taken down to measure and collect wind erosion products, so that the sand production rates of different heights are determined. The wind speed measuring instrument 61 and the rain amount sensor 62 are used for monitoring the current test wind speed and the current test rain intensity, after the wind speed and the current test rain intensity are stable, the display 64 is used for observing all parameters collected through the collecting cable 63, the communication controller 65 is used for controlling the self-closing valve 28 and the motor 32 above the flow control valve 25 and the spray head 26 to adjust the wind intensity and the wind speed, the sequence of the artificial rainfall and the wind tunnel test can be randomly adjusted, so that all the parameters meet the test requirements, and the hydraulic erosion under different rain intensities, the wind erosion under different wind speeds and the wind-water composite erosion caused by wind and rain simultaneously are simulated. The characteristic law of water and soil loss under the coupling action of multiple factors such as rainfall intensity, wind speed, duration and the like can be obtained through data arrangement and analysis.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting it, and although the present utility model has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the utility model can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the utility model.

Claims

1. The utility model provides a portable rainfall pattern-wind tunnel test device car which characterized in that: including automobile body subassembly, the artificial rainfall mechanism, wind-tunnel simulation mechanism, produce husky collection mechanism, collect drainage mechanism and data acquisition mechanism, wherein automobile body subassembly comprises automobile body and wheel, wheel fixed connection is in the bottom of automobile body, the inside of automobile body is equipped with the test cabin, the left and right sides of test cabin is open structure, test cabin inside is equipped with the soil tank box, wind-tunnel simulation mechanism sets up in the left side of test cabin inside, produce husky collection mechanism setting is connected with open structure department on the outside right side of test cabin, the artificial rainfall mechanism sets up the upside at the test cabin, collect drainage mechanism setting is at the inside bottom side of test cabin and be located the downside of soil tank box, artificial rainfall mechanism, wind-tunnel simulation mechanism all with data acquisition mechanism electric connection.

2. The portable artificial rainfall-wind tunnel test device cart of claim 1, wherein: the skeleton of automobile body all adopts galvanized angle steel frame, and the top and the bottom of automobile body adopt galvanized steel sheet, and the front and back wallboard of automobile body adopts organic glass board, uses rivet connection between organic glass board and the angle steel frame, uses welded connection between galvanized steel sheet and the angle steel frame, between the adjacent galvanized steel sheet, seals with glass cement between the organic glass board and between organic glass board and the galvanized steel sheet, and rubber seal strip is established to the seam, uses rivet connection between wheel and the automobile body.

3. The portable artificial rainfall-wind tunnel test device cart of claim 2, wherein: the middle part of the front side of the test cabin is reserved with a door made of an organic glass plate, one side of the door is provided with a handle, the door is connected with a door frame through a galvanized steel hinge, the door frame is made of galvanized angle steel, the organic glass plate is connected with the door frame through rivets, and sealing strips are adhered to the periphery of the door.

4. The portable artificial rainfall-wind tunnel test device cart of claim 1, wherein: the artificial rainfall mechanism comprises a water supply tank, a variable-frequency speed-regulating water pump, a water injection pipe, an adhesion frame, a flow control valve and a spray head, wherein the water supply tank is arranged on one side of the outside of the test cabin, the spray head is arranged on the top side of the inside of the test cabin, the spray head is connected with the water supply tank through the water injection pipe, the water injection pipe is connected with a vehicle body through the adhesion frame, and one end of the water injection pipe, which is close to the water supply tank, is sequentially provided with the variable-frequency speed-regulating water pump and the flow control valve.

5. The portable artificial rainfall-wind tunnel test device cart of claim 4, wherein: the shower nozzle is provided with a plurality of, and the aperture of a plurality of shower nozzles is all different, and the aperture scope of shower nozzle is 1-6mm, and every shower nozzle all is connected with the water injection pipe through the shower nozzle branch pipe, is equipped with the self-closing valve on the shower nozzle branch pipe.

6. The portable artificial rainfall-wind tunnel test device cart of claim 1, wherein: the wind tunnel simulation mechanism comprises a fan, a motor, a bracket and a honeycomb diffuser, wherein the honeycomb diffuser is arranged at the left side of the inside of the test cabin, the fan is arranged at one side of the honeycomb diffuser away from the soil tank body, the fan is connected with an output shaft of the motor, and the motor is connected with the inner wall of the test cabin through the bracket.

7. The portable artificial rainfall-wind tunnel test device cart of claim 1, wherein: the sand producing and collecting mechanism is provided with a plurality of sand producing and collecting mechanisms, the sand producing and collecting mechanisms are sequentially arranged on the right side of the outside of the test cabin from bottom to top, each sand producing and collecting mechanism comprises a sand inlet, a baffle and a sand storage bag, an inlet of the sand inlet is connected with an opening structure of the test cabin, the sand storage bag is detached and connected to the outlet side of the sand inlet, and the baffle is further rotationally connected to the outlet of the sand inlet through a rotating shaft.

8. The portable artificial rainfall-wind tunnel test device cart of claim 1, wherein: the data acquisition mechanism comprises an anemometer, a rainfall sensor, an acquisition cable, a display and a communication controller, wherein the anemometer is fixedly connected to the middle part of the test cabin and is arranged at the bottom of the test cabin, the anemometer and the rainfall sensor are connected with the display and the communication controller through the acquisition cable, and the display is connected to the upper side of the communication controller.

9. The portable artificial rainfall-wind tunnel test device cart of claim 1, wherein: the collecting and draining mechanism comprises a water collecting tank, a water draining pipe, a manual valve and a waste liquid barrel, wherein the water collecting tank is arranged at the bottom in the test cabin and is located at the lower side of the soil tank body, the waste liquid barrel is arranged at the outer side of the vehicle body, the water draining pipe is connected with the water collecting tank and extends to the upper side of the waste liquid barrel, and the manual valve is arranged on the water draining pipe.