Steel rail grinding device self-adaptive to track corrugation depth

Abstract

The invention discloses a steel rail grinding device self-adaptive to the rail corrugation depth, relates to the technical field of steel rail grinding, and aims to solve the technical problem that an existing steel rail grinding device self-adaptive to the rail corrugation depth is poor in grinding effect. The adjustable belt wheel set can be driven by the self-locking driving piece to rotate along the hinge point hinged to the fixing frame, the height from the adjustable belt wheel set to a steel rail is adjusted so as to adapt to steel rail corrugation, the self-adaptive belt wheel which automatically adapts to steel rail corrugation through the spring is matched, polishing of the trough of the steel rail corrugation is increased, missing polishing and insufficient polishing are reduced, and the polishing efficiency is improved. Meanwhile, a flushing assembly is arranged to cooperatively flush polishing residues on the outer side wall of the polishing belt, the polishing effect of the polishing belt is kept as long as possible, a self-locking driving piece can drive a cleaning strip to clean the detection assembly through a slider-crank mechanism, the visual field of the detection assembly is kept clear, and when the cleaning strip moves to the flushing range of the flushing assembly, the cleaning strip can be flushed thoroughly; the cleaning effect is kept.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail grinding technology, more particularly, to a rail grinding device capable of self-adapting to rail corrugation depth. BACKGROUND

[0002] Rail corrugation refers to the periodic wavy uneven wear on the top surface of the rail, which is one of the main diseases of the railway track. Its formation is usually closely related to factors such as friction self-excited vibration of the wheel-rail system, resonance effect at a specific speed, etc. Corrugation can significantly exacerbate the wheel-rail dynamic action, leading to accelerated fatigue damage of vehicle components and track structure, producing intense vibration and noise, and seriously affecting ride comfort, transportation safety and equipment service life. In order to alleviate the harm caused by corrugation and restore the smoothness of the rail surface, a grinding device can be used to maintain the rail.

[0003] The existing rail grinding device is provided with a rail grinding device capable of self-adapting to rail corrugation depth in order to grind more uniformly. For example, a grinding mounting frame is elastically suspended on a frame that can travel along the rail through a spring. The mounting frame is limited by a vertical direction guiding assembly so that it can only move vertically. A grinding wheel or grinding belt is installed at the bottom of the mounting frame. When the device travels, the self-weight of the grinding wheel or grinding belt cooperates with the expansion and contraction of the spring to make the grinding wheel move up and down with the corrugation of the rail, realizing self-adaptation of the grinding depth to the corrugation.

[0004] However, the grinding pressure of the above-mentioned rail grinding device capable of self-adapting to rail corrugation depth is determined by the compression or elongation of the spring. When encountering a wave crest, the compression amount of the spring increases, resulting in a sharp increase in grinding pressure. In the wave trough, the pressure is insufficient, which can easily lead to under-grinding. Secondly, more advanced grinding devices introduce a detection system, relying on the mode of measuring first and grinding later. The debris, dust and other substances generated by on-site grinding can easily splash onto the surface of the related sensors, blocking the detection port and affecting detection. SUMMARY

[0005] The purpose of the present application is to provide a rail grinding device capable of self-adapting to rail corrugation depth to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a rail car frame is provided; A grinding assembly is provided, which has two groups and is installed at the bottom of the rail car frame. The grinding assembly includes a grinding belt. The inner side wall of the grinding belt is connected with a fixed point pulley, a self-adapting pulley and an adjustable pulley group. The fixed point pulley, the self-adapting pulley and the adjustable pulley group can be driven to rotate by an electric motor A, driving the grinding belt to move for grinding. The adjustable pulley group can be driven to rotate by a self-locking driving member to adjust the height. The detection assembly is arranged on the outer wall of the polishing assembly and comprises a sensor, and the outer wall of the sensor is provided with a transparent protective cover, and the bottom of the transparent protective cover is a flat surface. The cleaning strip is arranged on the outer wall of the fixed frame and is connected with the crank slider mechanism at the power input end and can be driven by the self-locking driving member to move along the direction close to or away from the outer wall of the polishing belt to clean the flat surface at the bottom of the transparent protective cover. The flushing assembly is arranged on the outer wall of the fixed frame, and the flushing assembly comprises a nozzle, and the water outlet of the nozzle is located at the bottom and is inclined towards the polishing belt, so as to flush the polishing belt and the cleaning strip.

[0007] As a further description of the above technical scheme, the track frame comprises a chassis, and the chassis is provided with track wheels at the bottom.

[0008] As a further description of the above technical scheme, the polishing assembly further comprises a fixed frame mounted on the outer wall of the track frame, and the fixed point pulley, the self-adaptive pulley and the adjustable pulley group are arranged on the outer wall of the fixed frame.

[0009] As a further description of the above technical scheme, the adjustable pulley group comprises a movable frame hingedly connected to the outer wall of the fixed frame at the middle portion, the outer wall of the movable frame is provided with an arc slot, a sliding pin is slidably arranged in the arc slot, the sliding pin is mounted on the outer wall of the fixed frame, and pulley A is rotatably connected to the top and bottom of the movable frame.

[0010] As a further description of the above technical scheme, the self-adaptive pulley comprises an active arm hingedly connected to the outer wall of the fixed frame at one end, the active arm is provided with spring A at the other end and is elastically connected to the outer wall of the fixed frame through spring A, and pulley B is rotatably connected between the two ends of the active arm.

[0011] As a further description of the above technical scheme, the outer wall of the fixed frame is further provided with a self-locking driving member, the self-locking driving member comprises an electric motor B, the power output end of the electric motor B is connected with a worm, and the outer wall of the worm is engaged with a worm gear.

[0012] As a further description of the above technical scheme, the outer wall of the fixed frame is further provided with a speed reduction assembly, the speed reduction assembly comprises a gear A coaxially fixed on the outer wall of the worm gear, the outer wall of the gear A is engaged with a gear B, the gear B is coaxially fixed on the hinge of the movable frame hingedly connected to the fixed frame, and the diameter of the gear A is smaller than that of the gear B.

[0013] As a further description of the above technical solutions: the crank slider mechanism comprises a driving disc coaxially fixed on the outer wall of the gear A, a driving pin is fixed on the outer wall of the driving disc, a sliding frame is slidably connected to the outer wall of the driving pin, a sliding block is slidably connected to the outer wall of the sliding block, and the sliding seat is installed on the outer wall of the fixed frame.

[0014] As a further description of the above technical solutions: the sliding seat is provided with a spring B at one end of the inner wall, and the other end of the spring B is connected to the outer wall of the sliding block, and the sliding frame is provided with a cleaning strip.

[0015] As a further description of the above technical solutions: the nozzle water inlet is connected with a water pipe, the end of the water pipe is connected with a water pump, and the nozzle is connected with the water outlet of the water tank through the water pipe and the water pump.

[0016] In the above technical solutions, the present application has the following beneficial effects: The self-locking driving part can drive the adjustable pulley set to rotate along the hinge point hinged on the fixed frame, adjust the height from the rail, adapt to the rail corrugation, cooperate with the self-adaptive pulley which automatically adapts to the rail corrugation, increase the polishing at the trough of the rail corrugation, reduce the missed polishing and insufficient polishing, and set the flushing assembly to flush the polishing slag on the outer wall of the polishing belt, as long as possible to maintain the polishing effect of the polishing belt, and the self-locking driving part can also drive the cleaning strip to clean the detection assembly through the crank slider mechanism, keep the field of view of the detection assembly clear, and when the cleaning strip moves to the flushing range of the flushing assembly, it can also be flushed clean, keep the cleaning effect, and solve the problem of poor polishing effect of the existing self-adaptive rail corrugation depth rail polishing device. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0018] Figure 1 The explosion structure diagram provided by the embodiment of the present application is provided. Figure 2 The overall top view structure diagram provided by the embodiment of the present application is provided. Figure 3 The overall bottom view structure diagram provided by the embodiment of the present application is provided. Figure 4 The side view structure diagram of the polishing assembly provided by the embodiment of the present application is provided. Figure 5 The front view structure diagram of the polishing assembly provided by the embodiment of the present application is provided. Figure 6 The back structure schematic diagram of the polishing assembly provided by the embodiment of the present application is shown in the figure; Figure 7 The bottom structure schematic diagram of the polishing assembly provided by the embodiment of the present application is shown in the figure.

[0019] The figure mark explanation is as follows: 1, track frame; 2, polishing assembly; 3, self-locking driving part; 4, speed reduction assembly; 5, crank slider mechanism; 6, cleaning strip; 7, detection assembly; 8, flushing assembly; 9, water tank; 10, water pump; 101, bottom frame; 102, track wheel; 201, fixed frame; 202, motor A; 203, fixed point pulley; 204, adjustable pulley set; 205, self-adaptive pulley; 206, polishing belt; 2041, movable frame; 2042, arc groove; 2043, sliding pin; 2044, pulley A; 2051, pulley B; 2052, spring A; 2053, movable arm; 301, motor B; 302, worm; 303, worm gear; 401, gear A; 402, gear B; 501, driving disc; 502, driving pin; 503, sliding frame; 504, sliding seat; 505, sliding block part; 506, spring B; 701, sensor; 702, transparent protective cover; 801, nozzle; 802, water pipe. DETAILED DESCRIPTION

[0020] In order to make the skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings.

[0021] Please refer to Figures 1-7 The present application provides a technical solution: including track frame 1; In another embodiment provided by the present application, preferably, the track frame 1 includes a bottom frame 101, and the bottom frame 101 is provided with track wheels 102 at the bottom, and the track wheels 102 are at least two groups to ensure that the device can travel stably along the steel rail.

[0022] The polishing assembly 2 is installed on the bottom of the track frame 1 and includes a polishing belt 206, and the inner side wall of the polishing belt 206 is connected with a fixed point pulley 203, a self-adaptive pulley 205 and an adjustable pulley set 204, and the fixed point pulley 203, the self-adaptive pulley 205 and the adjustable pulley set 204 can be driven to rotate by the motor A 202 to drive the polishing belt 206 to move for polishing; The fixed frame 201 is provided with a fixed point pulley 203, an adaptive pulley 205 and an adjustable pulley set 204, which are all driven to rotate by the motor A 202, and collectively tension and drive the annular polishing belt 206 to move to grind the steel rail.

[0023] The adjustable pulley set 204 can be driven to rotate and the height can be adjusted by the self-locking driving member 3; In still another embodiment of the present application, the polishing assembly 2 further comprises a fixed frame 201 mounted on the outer side wall of the rail vehicle frame 1, and the fixed point pulley 203, the adaptive pulley 205 and the adjustable pulley set 204 are all arranged on the outer side wall of the fixed frame 201.

[0024] In still another embodiment of the present application, the adjustable pulley set 204 comprises a movable frame 2041 hingedly connected to the outer side wall of the fixed frame 201, the outer side wall of the movable frame 2041 is provided with an arc groove 2042, a sliding pin 2043 is slidably arranged in the arc groove 2042, the sliding pin 2043 is mounted on the outer side wall of the fixed frame 201, and pulley A 2044 is rotatably connected to the top and bottom of the movable frame 2041.

[0025] The adjustable pulley set 204 can actively control the polishing pressure, the movable frame 2041 is slidably connected to the sliding pin 2043 on the fixed frame 201 through the arc groove 2042 on the outer wall thereof, and the movable frame 2041 is rotatably connected to the top and bottom of the movable frame 2041.

[0026] In still another embodiment of the present application, the adaptive pulley 205 comprises a movable arm 2053 hingedly connected to the outer side wall of the fixed frame 201, a spring A 2052 is mounted at one end of the movable arm 2053 and elastically connected to the outer side wall of the fixed frame 201 through the spring A 2052, and pulley B 2051 is rotatably connected between the two ends of the movable arm 2053.

[0027] The pulley B 2051 of the adaptive pulley 205 is rotatably connected to the middle part of the movable arm 2053, and under the action of the spring A 2052, the pulley B 2051 can automatically float up and down with the slight undulation of the rail corrugation, so as to ensure that the polishing belt 206 is closely attached to the rail surface and reduces the separation due to slight undulation.

[0028] In still another embodiment of the present application, the outer side wall of the fixed frame 201 is further provided with a self-locking driving member 3, the self-locking driving member 3 comprises a motor B 301, the power output end of the motor B 301 is connected with a worm 302, and the outer side wall of the worm 302 is engaged with a worm gear 303.

[0029] The self-locking driving part 3 is used for providing a self-locking driving force, and the worm gear 303 and the worm 302 mechanism have the self-locking characteristic, so that the adjusted position is difficult to change under the impact of polishing.

[0030] In another embodiment of the present application, the outer side wall of the fixed frame 201 is further provided with a speed reduction assembly 4, which comprises a gear A401 coaxially fixed to the outer side wall of the worm gear 303, the outer side wall of the gear A401 is engaged with a gear B402, the gear B402 is coaxially fixed to the hinge of the movable frame 2041 hinged to the fixed frame 201, and the diameter of the gear A401 is smaller than that of the gear B402, which is used to adjust the transmission ratio.

[0031] In another embodiment of the present application, the crank slider mechanism 5 comprises a driving disc 501 coaxially fixed to the outer side wall of the gear A401, the outer side wall of the driving disc 501 is fixed with a driving pin 502, the outer side wall of the driving pin 502 is slidably connected with a sliding frame 503, the outer side wall of the sliding frame 503 is fixed with a slider 505, the outer side wall of the slider 505 is slidably connected with a sliding seat 504, and the sliding seat 504 is installed on the outer side wall of the fixed frame 201.

[0032] In another embodiment of the present application, the inner side wall of the sliding seat 504 is provided with a spring B506 at one end, and the other end of the spring B506 is connected to the outer side wall of the slider 505, and the outer side wall of the sliding frame 503 is connected with a cleaning strip 6.

[0033] The driving disc 501 of the crank slider mechanism 5 is coaxially fixed to the gear A401 and rotates with it. The driving pin 502 on the driving disc 501 drives the sliding frame 503 to move, and in turn drives the slider 505 fixed with the sliding frame 503 to make a reciprocating linear motion in the sliding seat 504, so as to drive the cleaning strip 6 to move along the direction close to / away from the outer side wall of the polishing belt 206, so as to clean the bottom plane of the transparent protective cover 702. At the same time, due to the setting of the spring B506, the cleaning strip 6 can stop at a place not blocking the field of view of the detection assembly 7 when it is not driven.

[0034] The detection assembly 7 is arranged on the outer side wall of the polishing assembly 2, and comprises a sensor 701, the outer side wall of the sensor 701 is provided with a transparent protective cover 702, the bottom of the transparent protective cover 702 is a plane, which is used for real-time monitoring of the polishing state or the track surface appearance. The cleaning strip 6 is arranged on the outer side wall of the fixed frame 201, and the power input end thereof is connected with the crank slider mechanism 5 and can be driven by the self-locking driving part 3 through the crank slider mechanism 5, so as to move along the direction close to / away from the outer side wall of the polishing belt 206, so as to clean the bottom plane of the transparent protective cover 702. The cleaning strip 6 is fixed to the sliding frame 503, and the movement path thereof passes through the bottom of the transparent protective cover 702 of the detection assembly 7. When the slider 505 reciprocates, it drives the cleaning strip 6 to scrape the protective cover plane, so as to realize cleaning.

[0035] The flushing assembly 8 is arranged on the outer side wall of the fixed frame 201, and comprises a nozzle 801, the water outlet of the nozzle 801 is located at the bottom and is inclined towards the polishing belt 206, and the nozzle 801 can flush the polishing belt 206 and the cleaning strip 6.

[0036] In another embodiment of the present application, the water inlet of the nozzle 801 is connected with a water pipe 802, the end of the water pipe 802 is connected with a water pump 10, and the nozzle 801 is connected with the water outlet of a water tank 9 through the water pipe 802 and the water pump 10.

[0037] The flushing assembly 8 is used for keeping the polishing belt 206 and the cleaning strip 6 clean, the nozzle 801 is inclined towards the outer side wall of the polishing belt 206, the nozzle 801 is connected with the water pump 10 and the water tank 9 through the water pipe 802, and the water jet can flush the polishing belt 206 and the cleaning strip 6; Working principle: the present embodiment provides a self-adaptive rail polishing device for rail wave grinding depth, when in use, the external power supply is used to turn on the motor A 202 and the motor B 301 through the external switch, the motor A 202 drives the polishing belt 206 to rotate at a high speed, and the polishing belt 206 moves to polish; The motor B 301 drives the movable frame 2041 of the adjustable pulley set 204 to swing through the self-locking driving part 3 and the speed reduction assembly 4, so that the pressure of the polishing belt 206 on the rail at the pulley A 2044 is actively set, the pressure is kept by the self-locking mechanism of the worm wheel 303 and the worm 302 after being set, the motor B 301 is a reversible motor, and the adjustable pulley set 204 can be driven to rotate forward or reversely along the hinge point hinged on the fixed frame 201, so that the contact pressure and the wrap angle of the polishing belt 206 on the rail are actively adjusted.

[0038] The motor B 301 drives the worm 302 to rotate, so that the worm wheel 303 meshed with the outer side wall of the worm 302 rotates, the gear A 401 rotates, the gear B 402 meshed with the outer side wall of the gear A 401 rotates slowly, the adjustable pulley set 204 is driven to rotate along the hinge point hinged on the fixed frame 201 at a small amplitude, the height of the two pulleys A 2044 is changed as a whole, so that the contact pressure and the wrap angle of the polishing belt 206 on the rail are actively adjusted, and the adjustment can be self-locked after being adjusted; The self-adaptive pulley 205 floats with the rail surface under the action of the spring A 2052, so as to ensure the continuity of contact, the pulley B 2051 of the self-adaptive pulley 205 is rotationally connected to the middle part of the movable arm 2053, under the action of the spring A 2052, the pulley B 2051 can automatically float up and down with the slight fluctuation of the rail wave grinding, so as to ensure that the polishing belt 206 is closely attached to the rail surface and reduces the separation due to slight fluctuation; The rotation synchronization of the motor B301 is converted into the reciprocating motion of the cleaning strip 6 through the crank slider mechanism 5, continuously cleaning the detection window, the flushing assembly 8 spraying water, and keeping the cleaning of the polishing belt 206 and the cleaning strip 6.

[0039] The driving disc 501 of the crank slider mechanism 5 is coaxially fixed on the gear A401 and rotates with it. The driving pin 502 on the driving disc 501 drives the slider frame 503 to move, and in turn drives the slider 505 fixed with the slider frame 503 to make reciprocating linear motion in the slide seat 504, thereby driving the cleaning strip 6 to move along the direction close to / away from the outer side wall of the polishing belt 206, so as to clean the bottom plane of the transparent protective cover 702. At the same time, due to the spring B506, the cleaning strip 6 can stop at a place not blocking the field of view of the detection assembly 7 when it is not driven; The nozzle 801 is inclined towards the outer side wall of the polishing belt 206. The nozzle 801 is connected to the water pump 10 and the water tank 9 through the water pipe 802. The water pump 10 is powered by an external power supply and is turned on by an external switch. The water in the water tank 9 can be pumped out through the water pipe 802 to the nozzle 801, and the water flow can flush the accumulated grinding dust on the polishing belt 206 and wash it away when the cleaning strip 6 moves to the flushing range, thereby maintaining the cleaning effect of the cleaning strip 6. The top of the water tank 9 is also provided with a water inlet, and a sealing cover is detachably connected to the water inlet (the motor A202 and the motor B301 are reversible motors, and the motor A202, the motor B301 and the water pump 10 are all existing products on the market and are connected to the external power supply and the external switch).

[0040] The above only describes some exemplary embodiments of the present application by way of illustration. It is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the present application.

Claims

1. A rail grinding device for adaptive track corrugation depth, characterized in that, Including the railcar frame (1); The grinding assembly (2) has two sets, both of which are installed at the bottom of the railcar frame (1). It includes a grinding belt (206). The inner side wall of the grinding belt (206) is connected to a fixed point pulley (203), an adaptive pulley (205), and an adjustable pulley group (204). The fixed point pulley (203), the adaptive pulley (205), and the adjustable pulley group (204) can all be driven to rotate by a motor A (202) to move the grinding belt (206) for grinding. The adjustable pulley assembly (204) can be driven to rotate and adjust its height by the self-locking drive component (3); The detection component (7) is set on the outer wall of the grinding component (2) and includes a sensor (701). The outer wall of the sensor (701) is provided with a transparent protective cover (702), and the bottom of the transparent protective cover (702) is flat. The cleaning strip (6) is set on the outer wall of the fixed frame (201). Its power input end is connected to the crank-slider mechanism (5) and can be driven by the self-locking drive (3) through the crank-slider mechanism (5) to move along the direction close to / away from the outer wall of the polishing belt (206) to clean the bottom plane of the transparent protective cover (702). A rinsing assembly (8) is provided on the outer wall of the fixing frame (201). The rinsing assembly (8) includes a nozzle (801) with the outlet of the nozzle (801) located at the bottom and inclined toward the polishing belt (206), which can be used to rinse the polishing belt (206) and the cleaning strip (6).

2. The rail grinding device for adaptive track corrugation depth according to claim 1, characterized in that, The railcar frame (1) includes a base frame (101), and the bottom of the base frame (101) is provided with rail wheels (102), and there are at least two sets of rail wheels (102).

3. The rail grinding device for adaptive track corrugation depth according to claim 2, characterized in that, The grinding assembly (2) also includes a fixed frame (201) installed on the outer wall of the railcar frame (1), wherein the fixed point pulley (203), the adaptive pulley (205) and the adjustable pulley group (204) are all located on the outer wall of the fixed frame (201).

4. The rail grinding device for adaptive track corrugation depth according to claim 3, characterized in that, The adjustable pulley assembly (204) includes a movable frame (2041) hinged in the middle to the outer wall of the fixed frame (201). The outer wall of the movable frame (2041) is provided with an arc groove (2042). A sliding pin (2043) slides in the arc groove (2042). The sliding pin (2043) is installed on the outer wall of the fixed frame (201). The top and bottom of the movable frame (2041) are rotatably connected to pulleys A (2044).

5. The rail grinding device for adaptive track corrugation depth according to claim 4, characterized in that, The adaptive pulley (205) includes a movable arm (2053) with one end hinged to the outer wall of the fixed frame (201), and a spring A (2052) is installed at the other end of the movable arm (2053) and is elastically connected to the outer wall of the fixed frame (201) through the spring A (2052). A pulley B (2051) is rotatably connected between the two ends of the movable arm (2053).

6. The rail grinding device for adaptive track corrugation depth according to claim 5, characterized in that, The outer wall of the fixed frame (201) is also equipped with a self-locking drive component (3), which includes a motor B (301). The power output end of the motor B (301) is connected to a worm gear (302), and a worm wheel (303) meshes with the outer wall of the worm gear (302).

7. The rail grinding device for adaptive track corrugation depth according to claim 6, characterized in that, The outer wall of the fixed frame (201) is also equipped with a speed reduction assembly (4). The speed reduction assembly (4) includes a gear A (401) coaxially fixed to the outer wall of the worm gear (303). A gear B (402) meshes with the outer wall of the gear A (401). The gear B (402) is coaxially fixed to the movable frame (2041) and hinged to the fixed frame (201). The diameter of the gear A (401) is smaller than that of the gear B (402).

8. The rail grinding device for adaptive track corrugation depth according to claim 7, characterized in that, The crank-slider mechanism (5) includes an active disk (501) coaxially fixed to the outer wall of gear A (401), an active pin (502) fixed to the outer wall of the active disk (501), a sliding frame (503) slidably connected to the outer wall of the active pin (502), a slider (505) fixed to the outer wall of the sliding frame (503), a slide block (504) slidably connected to the outer wall of the slider (505), and the slide block (504) mounted on the outer wall of the fixed frame (201).

9. The rail grinding device for adaptive track corrugation depth according to claim 8, characterized in that, A spring B (506) is installed on one end of the inner sidewall of the slide block (504), and the other end of the spring B (506) is connected to the outer sidewall of the slider (505). A cleaning strip (6) is connected to the outer sidewall of the slide frame (503).

10. The rail grinding device for adaptive track corrugation depth according to claim 9, characterized in that, The nozzle (801) is connected to a water pipe (802) at its inlet, and a water pump (10) is connected to the end of the water pipe (802). The nozzle (801) is connected to the outlet of a water tank (9) through the water pipe (802) and the water pump (10).

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