CN113026648B - Snow blowing vehicle - Google Patents
Snow blowing vehicle Download PDFInfo
- Publication number
- CN113026648B CN113026648B CN202011271182.8A CN202011271182A CN113026648B CN 113026648 B CN113026648 B CN 113026648B CN 202011271182 A CN202011271182 A CN 202011271182A CN 113026648 B CN113026648 B CN 113026648B
- Authority
- CN
- China
- Prior art keywords
- air
- arm
- main
- snow
- vehicle body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H5/00—Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice
- E01H5/04—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material
- E01H5/08—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by driven elements
Abstract
The invention discloses a snow blower, which comprises a vehicle body, an auxiliary power system positioned at the rear part of the vehicle body, and further comprises: the double-fan system is fixed in the middle of the vehicle body and is in driving connection with the output end of the auxiliary power system; the flow dividing device is fixed in the middle of the vehicle body and comprises an air inlet end and a plurality of air outlet ends, and the air inlet end is connected with the wind power output end of the double-fan system and is used for adjusting the wind power and the flow direction; the side air ducts are respectively positioned at the left side and the right side of the vehicle body, are respectively connected with the air outlet ends corresponding to the flow dividing devices through pipelines and are used for blowing snow at the two sides; and the multi-degree-of-freedom arm support air supply assembly is rotatably arranged at the front part of the vehicle body and positioned behind the cab, is connected with the corresponding air outlet end of the flow dividing device through a pipeline, and is used for blowing snow to the operation objects positioned in different radius ranges, angle directions and heights by wind power. The snow blowing machine has the advantages of wide operation range, high snow blowing performance and high operation safety, and is suitable for snow blowing operation under different working conditions and at different angles.
Description
Technical Field
The invention relates to snow removing equipment, in particular to a snow blowing vehicle.
Background
The existing snow removing device generally adopts a single fan or double fans as an air source if a snow blowing vehicle, the single (fan) air source generally selects a large-scale centrifugal fan, an axial flow fan or an aircraft engine, the performance is superior, but the energy consumption is high, the noise is large, the double (fan) air sources are respectively swept to the left side and the right side by the two fans, when the snow amount is large, the air volume of the fans is small, and the snow removing effect is poor. Simultaneously, current snow blower owner blows to the ground snow, to complicated operating mode, like the unable operation of snow of higher department of position such as guardrail, hard shoulder. Moreover, the air duct of the existing snow blowing vehicle is positioned at the front end of the cab, so that the sight of a driver is shielded, and the operation safety is low.
Disclosure of Invention
The invention provides a snow blower, which aims to solve the technical problems of single function, low operation efficiency, small operation range, poor effect, high energy consumption and low safety of the existing snow blower.
The technical scheme adopted by the invention is as follows:
a snow blower comprises a vehicle body, a secondary power system positioned at the rear part of the vehicle body and further comprises:
the double-fan system is fixed in the middle of the vehicle body, is in driving connection with the output end of the auxiliary power system and is used for providing wind power;
the flow dividing device is fixed in the middle of the vehicle body and comprises an air inlet end and a plurality of air outlet ends, and the air inlet end is connected with the wind power output end of the double-fan system and is used for adjusting the size and the flow direction of output wind power;
the side air channels are respectively positioned at the left side and the right side of the vehicle body, are respectively connected with the air outlet ends corresponding to the flow dividing devices through pipelines, and are used for blowing snow to the two sides of the vehicle body by wind power;
and the multi-degree-of-freedom arm support air supply assembly is rotatably arranged at the front part of the vehicle body and positioned behind the cab, is connected with the corresponding air outlet end of the flow dividing device through a pipeline, and is used for blowing snow to the operation objects positioned in different radius ranges, angle directions and heights by wind power.
Further, the double fan system includes:
the two fans are symmetrically fixed on the vehicle body and used for providing wind power;
and the transmission system is respectively connected with an engine output shaft of the auxiliary power system and fan shafts of the two fans and is used for transmitting the power at the output end of the auxiliary power system to the two fans.
Further, the transmission system includes:
a main shaft of the hydraulic pump is connected with an output shaft of the engine;
the valve group is connected with a hydraulic oil loop of the hydraulic pump through a pipeline and used for adjusting the output flow direction of hydraulic oil;
and the two hydraulic motors are connected with the valve group through pipelines, and output shafts of the two hydraulic motors are respectively connected with fan shafts of the corresponding fans to drive the corresponding fans to rotate.
Further, the flow dividing device comprises:
the air inlet chamber is provided with an air inlet interface connected with a wind power output end of the double-fan system, and air inlet control valves are arranged in the air inlet interfaces;
the distribution chamber is provided with air outlet interfaces for supplying air to the air channels on each side and the multi-degree-of-freedom arm support air supply assembly respectively, and air channel control valves are arranged in the air outlet interfaces;
and the collecting chamber is positioned between the air inlet chamber and the distribution chamber and is respectively communicated with the air inlet interface and the air outlet interface.
Further, the multi-degree-of-freedom arm support air supply assembly comprises:
the main slewing mechanism is fixedly arranged at the front part of the vehicle body, is positioned behind the cab and can rotate circumferentially around the axis of the main slewing mechanism;
the main arm is of a telescopic structure, the rear end of the main arm is hinged to the main swing mechanism through a pin shaft, and a gas channel is axially arranged in the main arm;
the rear end of the two arms is hinged with the front end of the main arm, and a pipeline channel is arranged in the two arms;
the rear end of the small arm blow nozzle assembly is hinged with the front ends of the two arms;
one end of the main air inlet hose is connected with the flow dividing device, and the other end of the main air inlet hose penetrates through the main swing mechanism to be connected with an air channel in the main arm;
one end of the main gas hose is connected with a gas inlet of the small arm blowing nozzle assembly, and the other end of the main gas hose penetrates through the pipeline channels of the two arms to be connected with a gas channel in the main arm;
the two ends of the main arm oil cylinder are respectively hinged with the main swing mechanism and the main arm and are used for adjusting the included angle between the main arm and the main swing mechanism;
the two ends of the telescopic oil cylinder are respectively hinged with the fixed end and the telescopic end of the main arm and are used for adjusting the axial length of the main arm;
two ends of the two-arm oil cylinder are respectively hinged with the main arm and the two arms and are used for adjusting the included angle between the main arm and the two arms;
and two ends of the small arm oil cylinder are respectively hinged with the small arm blow nozzle assembly and the two arms and used for adjusting an included angle between the small arm blow nozzle assembly and the two arms.
Further, the main arm includes:
an outer air duct;
one end of the inner air duct is telescopically sleeved in the outer air duct;
the sealing device is arranged between the outer air duct and the inner air duct and used for sealing a radial annular gap between the inner peripheral wall of the outer air duct and the outer peripheral wall of the inner air duct;
and two ends of the guide mechanism are respectively connected with the outer air duct and the inner air duct and are used for keeping the inner air duct coaxial when the inner air duct stretches and moves in the outer air duct.
Further, the small arm blow nozzle assembly includes:
the rear end of the small arm is respectively hinged with the front end of the two arms and the small arm oil cylinder through pin shafts, and an air channel is arranged in the small arm;
and the blowing nozzle is connected with the air channel at the front end of the small arm through a blowing nozzle swing mechanism capable of rotating in the circumferential direction and is used for adapting to blowing operation surfaces at different angles.
Furthermore, a guide plate for guiding, accelerating and increasing the blowing area and effect of the airflow is arranged in the air channel of the small arm and the blowing nozzle.
Furthermore, the blowing nozzle is symmetrically provided with a plurality of pairs of guide plates by taking the center line of the blowing nozzle as a symmetrical line, and the installation angles of the guide plates of each pair are sequentially increased in a direction away from the center line.
Furthermore, the front end of the multi-degree-of-freedom arm support air supply assembly is also provided with a distance sensor for detecting the relative distance between the multi-degree-of-freedom arm support air supply assembly and an operation target and preventing the multi-degree-of-freedom arm support air supply assembly from being damaged due to collision during movement;
and/or
A camera for observe operation operating mode, improvement operation security during the operation.
The invention has the following beneficial effects:
the snow blower provided by the invention has the advantages that the double-fan system, the flow dividing device, the side air duct and the multi-degree-of-freedom arm support air supply assembly are arranged at corresponding positions on the vehicle body, the double-fan system has two operation modes of single-fan operation and double-fan confluence, the single-fan operation is suitable for a working condition with small snow amount, the energy consumption is low, the noise is low, the double-fan confluence operation is suitable for a working condition with large snow amount, the snow blowing performance is improved through confluence, and the operation effect is improved; through the matching of the double fans and the flow dividing device, a plurality of blowing modes can be formed, and the device is suitable for removing snow under complex working conditions; the multi-degree-of-freedom arm support air supply assembly is combined with the side air duct, a combined operation mode of downward blowing and side blowing of the arm support is adopted, the snow blowing operation effect on the ground can be improved, the high-efficiency snow blowing operation can be performed on the accumulated snow at the higher positions such as a guardrail and an isolation pier, the problems that the accumulated snow at the high positions needs to be manually removed and the snow is removed through mechanical secondary operation in the existing high-position accumulated snow blowing mode are solved, the accumulated snow is mechanically removed through once blowing, the operation range is wide, and the multi-degree-of-freedom arm support air supply assembly is suitable for snow blowing operation under different working conditions and at different angles.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view of a snow blower according to a preferred embodiment of the present invention.
Fig. 2 is an assembly view of the flow splitting device and the dual fan system according to the preferred embodiment of the present invention.
Fig. 3 is a schematic front view of a multi-degree-of-freedom boom air supply assembly according to a preferred embodiment of the present invention.
Fig. 4 is a schematic top view of a multi-degree-of-freedom boom blower assembly according to a preferred embodiment of the present invention.
Figure 5 is a schematic diagram of the structure of a main arm of a preferred embodiment of the present invention.
Figure 6 is a schematic view of the construction of the lower arm blow nozzle assembly of the preferred embodiment of the present invention.
In the figure: 1. a vehicle body; 2. the multi-degree-of-freedom arm support air supply assembly; 3. a flow divider; 4. a dual fan system; 5. a secondary power system; 6. a proximity switch; 7. a side air duct; 8. an engine; 9. a hydraulic pump; 10. a valve block; 11. a fan; 12. a hydraulic motor; 13. an air intake chamber; 14. a collecting chamber; 15. a dispensing chamber; 16. a right air duct control valve; 17. an arm support air duct control valve; 18. a left air duct control valve; 19. an air intake control valve; 20. a main swing mechanism; 21. a main air intake hose; 22. a main arm; 23. a main arm cylinder; 24. a telescopic oil cylinder; 25. a two-arm oil cylinder; 26. a pin shaft; 27. two arms; 28. a small arm cylinder; 29. a small arm blow nozzle assembly; 30. an outer air duct; 31. a guide mechanism; 32. a sealing device; 33. an inner air duct; 34. a small arm; 35. a baffle; 36. a blowing nozzle rotating mechanism; 37. a distance sensor; 38. a blowing nozzle; 39. a camera; 40. a main gas hose.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, a preferred embodiment of the present invention provides a snow blower, including a vehicle body 1, an auxiliary power system 5 located at the rear of the vehicle body 1, a double-fan system 4, a flow divider 3, a side air duct 7, and a multi-degree-of-freedom boom air supply assembly 2, wherein:
the double-fan system 4 is fixed in the middle of the vehicle body 1, is in driving connection with the output end of the auxiliary power system 5 and is used for providing wind power;
the flow dividing device 3 is fixed in the middle of the vehicle body 1 and comprises an air inlet end and a plurality of air outlet ends, and the air inlet end is connected with the wind power output end of the double-fan system 4 and is used for adjusting the size and the flow direction of output wind power;
the side air ducts 7 are respectively positioned at the left side and the right side of the vehicle body 1, are respectively connected with the air outlet ends corresponding to the flow dividing devices 3 through pipelines, and are used for blowing snow to the two sides of the vehicle body 1 by wind power;
the multi-degree-of-freedom arm support air supply assembly 2 is rotatably arranged at the front part of the vehicle body 1 and behind the cab, is connected with the air outlet end corresponding to the flow dividing device 3 through a pipeline, and is used for blowing snow to operation objects in different radius ranges, angle directions and heights by wind power.
The snow blower of the embodiment is provided with the double-fan system 4, the flow dividing device 3, the side air duct 7 and the multi-degree-of-freedom arm support air supply assembly 2 at corresponding positions on the vehicle body 1, the double-fan system 4 has two operation modes of single-fan operation and double-fan confluence operation, the single-fan operation is suitable for working conditions with small snow amount and has the characteristics of low energy consumption and low noise, the double-fan confluence operation is suitable for working conditions with large snow amount, and the operation effect is improved by promoting the wind power through confluence; through the matching of the double-fan system 4 and the flow dividing device 3, a plurality of blowing modes can be formed, and the device is suitable for removing snow under complex working conditions; multi freedom cantilever crane air supply assembly 2 combines together with side wind channel 7, adopt the cantilever crane to blow downwards and blow compound operation mode with the side, can enough improve the snow blowing operation effect to ground, can also be to complicated operating mode, like the guardrail, the snow of higher department of position such as hard shoulder carries out the high efficiency snow blowing operation, the problem that current eminence snow can't be blown off and need artifical clear away and mechanical secondary operation to clear away has been solved, realize that mechanized once sweeps and clears away snow, the operation wide range, be applicable to different operating modes and different angles snow blowing operation, and simultaneously, because the wind channel of this embodiment no longer fixedly is located the driver's cabin front end, can not shelter from driver's sight, can improve operation security by a wide margin, reduce the emergence probability of incident.
In a preferred embodiment of the invention, as shown in fig. 2, the dual fan system 4 comprises two fans 11 and a transmission system, wherein:
the two fans 11 are symmetrically fixed on the vehicle body 1 and used for providing wind power;
the transmission system is respectively connected with an output shaft of an engine 8 of the auxiliary power system 5 and fan shafts of the two fans 11, and is used for transmitting power at the output end of the auxiliary power system 5 to the two fans 11 to provide wind power.
In this embodiment, the double-fan system 4 provides wind power for snow blowing operation through two fans 11 symmetrically fixed on the vehicle body 1, wherein fan shafts of the two fans 11 are connected with an output end of the auxiliary power system 5 through a transmission system, and output power of the auxiliary power system 5 is used for rotating to respectively generate wind power for snow blowing operation.
In particular, the transmission system comprises a hydraulic pump 9, a valve group 10 and two hydraulic motors 12, wherein:
the main shaft of the hydraulic pump 9 is connected with the output shaft of the engine 8;
the valve group 10 is connected with a hydraulic oil loop of the hydraulic pump 9 through a pipeline and used for adjusting the output flow direction of hydraulic oil;
the two hydraulic motors 12 are connected with the valve group 10 through pipelines, and output shafts of the two hydraulic motors 12 are respectively connected with fan shafts of the corresponding fans 11 to drive the corresponding fans 11 to rotate to generate wind power.
In this embodiment, the transmission system is driven by a hydraulic system, wherein a fan shaft of each fan 11 is drivingly connected to one hydraulic motor 12, and each hydraulic motor 12 is supplied with pressure oil from the same hydraulic pump 9 through the valve group 10, and the valve group 10 can be used to adjust the flow direction of the pressure oil entering the hydraulic motor 12, thereby controlling the single operation or the double operation of the hydraulic motor 12, so that the two fans 11 perform single-rotation air supply or double-simultaneous air supply, thereby improving the applicable range and the snow blowing effect, and meeting the requirements of different working conditions.
In a preferred embodiment of the invention, as shown in fig. 2, said diverting means 3 comprise an inlet chamber 13, a distribution chamber 15 and a collecting chamber 14, wherein:
the air inlet chamber 13 is provided with an air inlet interface connected with the wind power output end of the double-fan system 4, and air inlet control valves 19 are arranged in the air inlet interfaces;
the distribution chamber 15 is provided with air outlet interfaces for respectively supplying air to the side air ducts 7 and the multi-degree-of-freedom arm support air supply assembly 2, air duct control valves are arranged in the air outlet interfaces, for example, a right air duct control valve 16 is arranged in the air outlet interface of the side air duct 7 connected to the right side of the vehicle body 1, an arm support air duct control valve 17 is arranged in the air outlet interface connected to the multi-degree-of-freedom arm support air supply assembly 2, and a left air duct control valve 18 is arranged in the air outlet interface connected to the side air duct 7 on the left side of the vehicle body 1;
the collecting chamber 14 is located between the air inlet chamber 13 and the distribution chamber 15, and is respectively communicated with the air inlet interface and the air outlet interface.
In this embodiment, the flow dividing device 3 is provided with an air inlet chamber 13, a distribution chamber 15 and a flow collecting chamber 14, the air inlet chamber 13 is provided with two air inlet interfaces, the two air inlet interfaces are respectively connected with the wind power output ends of the two fans 11 of the dual-fan system 4, and meanwhile, an air inlet control valve 19 capable of controlling the on and off of wind power is arranged in each air inlet interface; the collecting chamber 14 is positioned between the air inlet chamber 13 and the distribution chamber 15, is respectively communicated with the air inlet interfaces and the air outlet interfaces, and plays a role in interconnection, and wind power input by the two air inlet interfaces can be collected into the collecting chamber 14 and then flows to the distribution chamber 15 from the collecting chamber 14. The distribution chamber 15 is respectively provided with three air outlet interfaces which are respectively communicated with the side air ducts 7 positioned on the left side and the right side of the vehicle body 1 and the multi-degree-of-freedom arm frame air supply assembly 2, the corresponding air outlet interfaces are respectively provided with a right air duct control valve 16, an arm frame air duct control valve 17 and a left air duct control valve 18, and the air inlet control valve 19 in the air inlet interface can control the size of wind power entering the collecting chamber 14 in the embodiment, if the wind power required to blow snow is small under the working condition of small snow amount, one of the air inlet control valves 19 can be opened, one of the fans 11 supplies air, and then the flow direction of the air flow is controlled through the opening and closing of the right air duct control valve 16, the arm frame air duct control valve 17 and the left air duct control valve 18, so that the wind power is supplied to the side air ducts 7, The multi-degree-of-freedom arm frame air supply assembly 2 carries out snow blowing operation on the position needing snow blowing, when the working condition is faced with a large snow amount, the wind power needed to blow the snow is large, the two air inlet control valves 19 are opened, the two fans 11 supply the wind simultaneously, the wind power is increased, and then the wind power is sent to the side air channel 7 through the right air channel control valve 16, the arm frame air channel control valve 17 and the left air channel control valve 18, and the multi-degree-of-freedom arm frame air supply assembly 2 carries out the snow blowing operation on the position needing snow blowing. In this embodiment, it can be seen that the air is sent to the side air duct 7 and the multi-degree-of-freedom arm frame air supply assembly 2 through the air inlet control valve 19, the right air duct control valve 16, the arm frame air duct control valve 17, and the left air duct control valve 18, so as to achieve the purpose of controlling the size and the flow direction of the air flow.
As can be seen from fig. 2, in this embodiment, single-fan operation or double-fan operation can be selected according to the thickness of the accumulated snow, the air inlet control valve 19 controls the air inlet interface to open and close to adjust the required wind power, and when the fan 11 does not work, the air inlet control valve 19 is in a closed state to avoid gas backflow. High-pressure and high-speed airflow generated by the fan 11 enters the collecting chamber 14 through the air inlet chamber 13, and finally the flow direction of the airflow is controlled through the opening and closing of the right air duct control valve 16, the arm support air duct control valve 17 and the left air duct control valve 18. Through the combined control of right side wind channel control valve 16, cantilever crane wind channel control valve 17, left side wind channel control valve 18, air admission control valve 19, can form eight kinds of operational modes, be applicable to the snow removing operation of different operating modes, specifically include:
mode I, single fan left side purging mode
At this time, one of the fans 11 is started through the valve group 10 to serve as a working fan, an air inlet control valve 19 corresponding to the working fan is opened, a right air duct control valve 16 and an arm frame air duct control valve 17 are closed, a left air duct control valve 18 is opened, high-speed air enters a side air duct 7 positioned on the left side of the vehicle body 1 to blow snow to the left ground, and at this time, the single-fan operation is adopted, so that the snow blowing operation is suitable for the working condition with small snow amount, the energy consumption is low, and the noise is low.
Mode two, single fan right side blowing mode
At this time, one of the fans 11 is started through the valve group 10 to serve as a working fan, an air inlet control valve 19 corresponding to the working fan is opened, the boom air duct control valve 17 and the left air duct control valve 18 are closed, and the right air duct control valve 16 is opened; the high-speed air flow enters the side air duct 7 positioned on the right side of the vehicle body 1 to blow snow to the ground on the right side, and at the moment, the single-fan operation is adopted, so that the snow blowing vehicle is suitable for the working condition with small snow quantity, and is low in energy consumption and low in noise.
Mode III, single-fan arm support purging mode
At this time, one of the fans 11 is started through the valve group 10 to serve as a working fan, an air inlet control valve 19 corresponding to the working fan is opened, a right air duct control valve 16 and a left air duct control valve 18 are closed, and an arm frame air duct control valve 17 is opened; the high-speed airflow enters the multi-degree-of-freedom arm support air supply assembly 2, the multi-degree-of-freedom arm support air supply assembly 2 can lead the high-pressure high-speed airflow to a high position, high-altitude sweeping operation is achieved, snow at a higher position such as a guardrail and an isolation pier is efficiently blown, the problem that the snow at the high position cannot be blown off and needs to be manually cleared and mechanically cleared through secondary operation is solved, mechanized one-time sweeping and snow clearing is achieved, and at the moment, due to the fact that the single fan operates, the multi-degree-of-freedom arm support air supply assembly is suitable for the working condition of small snow amount, low in energy consumption and low in noise.
Mode four, double-fan left-side confluence purging mode
At the moment, the two fans 11 are started through the valve group 10, the air inlet control valves 19 corresponding to the two fans 11 are opened, the right air duct control valve 16 and the arm support air duct control valve 17 are closed, the left air duct control valve 18 is opened, high-speed air flows enter the left air duct 7 on the left side of the vehicle body 1 after confluence to blow snow on the ground on the left side, and at the moment, due to the double-fan operation, the wind power is increased after confluence, so that the snow blowing device is suitable for the working condition with large snow amount, and the snow blowing performance and the working effect are improved.
Mode five, double-fan right-side confluence purging mode
At this time, the two fans 11 are started through the valve group 10, the air inlet control valves 19 corresponding to the two fans 11 are opened, the left air duct control valve 18 and the arm frame air duct control valve 17 are closed, the right air duct control valve 16 is opened, the high-speed air flow enters the side air duct 7 on the right side of the vehicle body 1 after confluence to blow snow on the right ground, at the moment, due to the double-fan operation, the wind power is increased after confluence, the snow blowing device is suitable for the working condition with large snow quantity, and the snow blowing performance and the working effect are improved.
Mode six, double-fan boom confluence purging mode
At this time, the two fans 11 are started through the valve group 10, the air inlet control valves 19 corresponding to the two fans 11 are opened, the right air duct control valve 16 and the left air duct control valve 18 are closed, and the boom air duct control valve 17 is opened; high-speed air current gets into multi freedom cantilever crane air supply assembly 2, and multi freedom cantilever crane air supply assembly 2 can lead high-pressure high-speed air current to the eminence, realize the high altitude and sweep the operation, carry out the high efficiency snow blowing operation to the snow of higher department such as guardrail, hard shoulder, the problem that current eminence snow can't be blown off and need artifical clear away and mechanical secondary operation to clear away has been solved, realize mechanized once to sweep and clear away the snow, this moment, because be double fan operation, the wind-force increases after the confluence, be fit for the great operating mode of snow volume, promote snow blowing performance and operation effect.
Mode seven, double-fan arm support and left side composite purging mode
At the moment, the two fans 11 are started through the valve group 10, the air inlet control valves 19 corresponding to the two fans 11 are opened, the right air duct control valve 16 is closed, the left air duct control valve 18 and the arm support air duct control valve 17 are opened, high-speed air flows respectively enter the multi-degree-of-freedom arm support air supply assembly 2 and the side air duct 7 positioned at the left side of the vehicle body 1, the mode can not only carry out snow blowing operation on the left ground, but also lead high-pressure high-speed airflow to a high place through the multi-degree-of-freedom arm support air supply assembly 2 to realize high-altitude blowing operation, snow at higher positions such as guardrails and isolation piers is blown with high efficiency, the problem that the snow at high positions cannot be blown off and needs to be cleared manually and mechanically for secondary operation is solved, mechanized one-time blowing and snow clearing is realized, at the moment, due to the double-fan operation, the wind power is increased after confluence, the snow blowing machine is suitable for the working condition with larger snow quantity, and the snow blowing performance and the operation effect are improved.
Mode eight, double-fan arm support and right side composite purging mode
At the moment, the two fans 11 are started through the valve group 10, the air inlet control valves 19 corresponding to the two fans 11 are opened, the left air duct control valve 18 is closed, the right air duct control valve 16 and the arm support air duct control valve 17 are opened, high-speed air flows respectively enter the multi-degree-of-freedom arm support air supply assembly 2 and the side air duct 7 positioned on the right side of the vehicle body 1, the mode can not only carry out snow blowing operation on the right ground, but also lead high-pressure high-speed airflow to a high place through the multi-degree-of-freedom arm support air supply assembly 2 to realize high-altitude blowing operation, snow at higher positions such as guardrails and isolation piers is blown with high efficiency, the problem that the snow at high positions cannot be blown off and needs to be cleared manually and mechanically for secondary operation is solved, mechanized one-time blowing and snow clearing is realized, at the moment, due to the double-fan operation, the wind power is increased after confluence, the snow blowing machine is suitable for the working condition with larger snow quantity, and the snow blowing performance and the operation effect are improved.
In conclusion, the double-fan system 4 and the flow dividing device 3 cooperate to realize eight modes of left purging (single fan), right purging (single fan), boom purging (single fan), left purging (double fan confluence), right purging (double fan confluence), boom blowing and side blowing (left side or right side) and the like, and the device is suitable for removing snow under complex working conditions and improves the operation application range.
As shown in fig. 3 and 4, in the preferred embodiment of the present invention, the multi-degree-of-freedom boom blower assembly 2 includes a main swing mechanism 20, a main boom 22, a second boom 27, a small boom nozzle assembly 29, a main air hose 40, a main air hose 21, a main boom cylinder 23, a telescopic cylinder 24, a second boom cylinder 25, and a small boom cylinder 28, wherein:
the main slewing mechanism 20 is fixedly arranged at the front part of the vehicle body 1, is positioned behind a cab, and can rotate circumferentially around the axis of the main slewing mechanism;
the main arm 22 adopts a telescopic structure, the rear end of the main arm is hinged to the main swing mechanism 20 through a pin shaft 26, and a gas channel is axially arranged inside the main arm;
the rear ends of the two arms 27 are hinged with the front end of the main arm 22, and a pipeline channel is arranged in the two arms;
the rear end of the small arm blow nozzle assembly 29 is hinged with the front ends of the two arms 27;
one end of the main air inlet hose 21 is connected with the splitter 3, and the other end of the main air inlet hose passes through the main swing mechanism 20 and is connected with an air channel in the main arm 22;
one end of the main air hose 40 is connected with the air inlet of the small arm blowing nozzle assembly 29, and the other end of the main air hose penetrates through the pipeline channels of the two arms 27 to be connected with the air channel in the main arm 22;
two ends of the main arm oil cylinder 23 are respectively hinged with the main slewing mechanism 20 and the main arm 22 and are used for adjusting an included angle between the main arm 22 and the main slewing mechanism 20;
two ends of the telescopic oil cylinder 24 are respectively hinged with the fixed end and the telescopic end of the main arm 22 and used for adjusting the axial length of the main arm 22;
two ends of the two-arm oil cylinder 25 are respectively hinged with the main arm 22 and the two arms 27 and used for adjusting an included angle between the main arm 22 and the two arms 27;
and two ends of the small arm oil cylinder 28 are respectively hinged with the small arm blow nozzle assembly 29 and the two arms 27 and are used for adjusting the included angle between the small arm blow nozzle assembly 29 and the two arms 27.
In this embodiment, the main structure of the multi-degree-of-freedom boom air supply assembly 2 mainly includes a main swing mechanism 20, a main boom 22, two booms 27, and a small boom blow gun assembly 29, meanwhile, an air channel in the main boom 22 is connected with the splitter 3 through a main air inlet hose 21, and an air inlet of the small boom blow gun assembly 29 is connected with an air channel in the main boom 22 through a main air inlet hose 40. The main air inlet hose 21 is divided into two sections and connected into a whole through a rotary joint, and when the main revolving mechanism 20 rotates, the main air inlet hose 21 does not twist and deform, so that the air flow can smoothly flow into the air passage in the main arm 22 all the time. In addition, the main air hose 40 is provided with a bending section for keeping a deformation allowance in the process of adjusting the included angle between the small arm blow nozzle assembly 29 and the two arms 27, so that the main air hose 40 is prevented from being broken.
The main swing mechanism 20, the main arm cylinder 23, the telescopic cylinder 24, the two-arm cylinder 25 and the small arm cylinder 28 are used as power parts for driving all parts of the multi-degree-of-freedom arm frame air supply assembly 2. The main swing mechanism 20 is fixed on the vehicle body 1 and can output circumferential rotation, the main arm 22, the two arms 27 and the small arm blow gun assembly 29 are sequentially hinged on the main swing mechanism 20 in series, and the main arm 22 adopts a telescopic structure, so that the multi-degree-of-freedom arm support air supply assembly 2 has five degrees of freedom, wherein the main swing mechanism 20 can enable the main arm 22, the two arms 27 and the small arm blow gun assembly 29 to circumferentially rotate 360 degrees; when the main arm oil cylinder 23 acts, the included angle between the main arm 22 and the main slewing mechanism 20 can be controlled; when the telescopic oil cylinder 24 acts, the main arm 22 can be controlled to be telescopic so as to increase the operation range of the arm support; when the two-arm oil cylinder 25 acts, the included angle between the main arm 22 and the two arms 27 can be controlled; when the small arm oil cylinder 28 is actuated, the included angle between the small arm blow nozzle assembly 29 and the two arms 27 can be controlled. Main rotation mechanism 20, main arm hydro-cylinder 23, flexible hydro-cylinder 24, two arm hydro-cylinders 25, forearm hydro-cylinder 28 mutually support, common control 2 terminal positions and the gesture of multi freedom cantilever crane air supply assembly make forearm blow gun assembly 29 can carry out the high efficiency snow blowing operation to the snow of higher department of position such as guardrail, hard shoulder, solved current eminence snow and can't blow off and need the manual work to clear away and the problem that machinery secondary operation was clear away, the action is nimble, the displacement is accurate reliable, the working range is wide.
As shown in fig. 5, in the preferred embodiment of the present invention, the main arm 22 includes an outer air duct 30, an inner air duct 33, a sealing device 32, and a guiding mechanism 31, wherein:
one end of the inner air duct 33 is telescopically sleeved in the outer air duct 30;
the sealing device 32 is arranged between the outer air duct 30 and the inner air duct 33 and is used for sealing a radial annular gap between the inner peripheral wall of the outer air duct 30 and the outer peripheral wall of the inner air duct 33 so as to prevent gas leakage;
two ends of the guiding mechanism 31 are respectively connected with the outer air duct 30 and the inner air duct 33, and are used for keeping the inner air duct 33 coaxial when the inner air duct 33 extends and retracts in the outer air duct 30.
In this embodiment, the inner air duct 33 can slide inside the outer air duct 30, and the operation range of the boom can be increased by adjusting the relative positions of the inner air duct 33 and the outer air duct 30, so that snow blowing operation can be performed on targets within different operation radius ranges without moving the vehicle body 1, and the operation efficiency is improved. The guiding mechanism 31 is used for supporting the inner air duct 33 and guiding the inner air duct 33 to keep the same axis when the inner air duct 33 moves in the outer air duct 30 in a telescopic manner.
In a preferred embodiment of the present invention, as shown in fig. 6, the small arm nozzle assembly 29 comprises a small arm 34, a nozzle 38 and a nozzle swing mechanism 36, wherein:
the rear end of the small arm 34 is respectively hinged with the front ends of the two arms 27 and the small arm oil cylinder 28 through a pin shaft 26, and an air channel is arranged inside the small arm;
the blowing nozzle 38 is connected with the air duct at the front end of the small arm 34 through a blowing nozzle slewing mechanism 36 capable of rotating circumferentially, and is used for adapting to blowing working surfaces at different angles.
In this embodiment, the small arm nozzle assembly 29 includes a small arm 34, a nozzle 38 and a nozzle turning mechanism 36, the nozzle 38 is a flat duckbill, and the included angle θ between the two side walls is 80-120 °. The small arm 34 can rotate for a certain angle around the pin shaft 26, and meanwhile, the nozzle slewing mechanism 36 can drive the nozzle 38 to rotate for 360 degrees, so that the number of degrees of freedom of the multi-degree-of-freedom arm support air supply assembly 2 is further increased, the multi-degree-of-freedom arm support air supply assembly is suitable for working surfaces with different working conditions and different angles, and the purging effect is further improved.
Specifically, in a preferred embodiment of the present invention, the air duct of the small arm 34 and the blowing nozzle 38 are provided with guide plates 35 for guiding, accelerating, and increasing the cleaning area and the effect of the air flow, wherein the blowing nozzle 38 is symmetrically provided with two pairs of guide plates 35 by taking a center line of the blowing nozzle 38 as a symmetry line, installation angles of the respective pairs of guide plates 35 sequentially increase in a direction away from the center line, for example, an installation angle α of one pair of guide plates 35 closest to the center line is 10 to 20 °, and an installation angle β of the other pair of guide plates 35 is 30 to 40 °. The guide plate 35 has strengthening effects of guiding, accelerating, increasing the blowing area and the blowing effect and the like on the air flow so as to improve the blowing effect.
Specifically, in the preferred embodiment of the present invention, the front end of the multi-degree-of-freedom boom air supply assembly 2 is further provided with a distance sensor 37 for detecting a relative distance to a working target and preventing damage caused by collision during movement;
and/or
And a camera 39 for observing the working condition and improving the safety of the operation.
In this embodiment, at the front end of the multi-degree-of-freedom boom air supply assembly 2, if the distance sensor 37 is arranged on the blowing nozzle 38 of the small arm blowing nozzle assembly 29, the distance sensor 37 is used for detecting the distance between the blowing nozzle 38 and the target in real time in the operation process, and once the distance between the blowing nozzle 38 and the target is detected to be lower than a set threshold value, the multi-degree-of-freedom boom air supply assembly 2 stops moving, so that the blowing nozzle 38 is prevented from colliding and being damaged when the boom moves, and the operation safety is improved. The distance sensor 37 may be an ultrasonic distance sensor, a laser distance sensor, an infrared distance sensor, or the like.
Further, the front end of the multi-degree-of-freedom arm frame air supply assembly 2 is further provided with a camera 39, and the camera 39 is used for shooting the operation working condition at the front end of the multi-degree-of-freedom arm frame air supply assembly 2 in real time during operation and transmitting video information to a display screen of an operation room so that an operator can observe the operation working condition in time, and operation safety is improved.
In addition, in a preferred embodiment of the present invention, the vehicle body 1 is further provided with a proximity switch 6, for example, the proximity switch 6 is arranged on a protection carriage for protecting the auxiliary power system 5, the double-fan system 4 and the shunt device 3, when the tail end of the multi-degree-of-freedom arm support air supply assembly 2 moves to a preset initial position, the proximity switch 6 sends a sensing signal to prompt an operator that the multi-degree-of-freedom arm support air supply assembly 2 has reached the preset initial position, or the multi-degree-of-freedom arm support air supply assembly 2 stops moving, so that the multi-degree-of-freedom arm support air supply assembly 2 is ensured to be accurately stored to the preset initial position after the snow blowing operation is completed, and potential safety hazards caused by the fact that the multi-degree-of freedom arm support air supply assembly 2 is not stored in place are avoided.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A snow blower, which comprises a vehicle body (1) and an auxiliary power system (5) positioned at the rear part of the vehicle body (1), and is characterized in that,
further comprising:
the double-fan system (4) is fixed in the middle of the vehicle body (1), is in driving connection with the output end of the auxiliary power system (5) and is used for providing wind power;
the flow dividing device (3) is fixed in the middle of the vehicle body (1) and comprises an air inlet end and a plurality of air outlet ends, and the air inlet end is connected with the wind power output end of the double-fan system (4) and is used for adjusting the size and the flow direction of output wind power;
the side air ducts (7) are respectively positioned at the left side and the right side of the vehicle body (1), are respectively connected with the corresponding air outlet ends of the flow dividing devices (3) through pipelines, and are used for blowing snow to the two sides of the vehicle body (1) by wind power;
and the multi-degree-of-freedom arm support air supply assembly (2) is rotatably arranged at the front part of the vehicle body (1) and positioned behind the cab, is connected with the corresponding air outlet end of the flow dividing device (3) through a pipeline, and is used for blowing snow to the operation objects positioned in different radius ranges, angle directions and heights by wind power.
2. The snow blower of claim 1,
the double fan system (4) comprises:
the two fans (11) are symmetrically fixed on the vehicle body (1) and are used for providing wind power;
and the transmission system is respectively connected with an output shaft of an engine (8) of the auxiliary power system (5) and fan shafts of the two fans (11) and is used for transmitting the power at the output end of the auxiliary power system (5) to the two fans (11).
3. The snow blower of claim 2,
the transmission system comprises:
a main shaft of the hydraulic pump (9) is connected with an output shaft of the engine (8);
the valve group (10) is connected with a hydraulic oil loop of the hydraulic pump (9) through a pipeline and is used for adjusting the output flow direction of hydraulic oil;
and the two hydraulic motors (12) are connected with the valve group (10) through pipelines, and output shafts of the two hydraulic motors (12) are respectively connected with fan shafts of the corresponding fans (11) to drive the corresponding fans (11) to rotate.
4. The snow blower of claim 1,
the flow dividing device (3) comprises:
the air inlet chamber (13) is provided with an air inlet interface connected with a wind power output end of the double-fan system (4), and air inlet control valves (19) are arranged in the air inlet interfaces;
the distribution chamber (15) is provided with air outlet interfaces for supplying air to the air channels (7) on each side and the multi-degree-of-freedom arm support air supply assembly (2), and air channel control valves are arranged in the air outlet interfaces;
and the collecting chamber (14) is positioned between the air inlet chamber (13) and the distribution chamber (15) and is respectively communicated with the air inlet interface and the air outlet interface.
5. The snow blower of claim 1,
the multi-degree-of-freedom arm frame air supply assembly (2) comprises:
the main slewing mechanism (20) is fixedly arranged at the front part of the vehicle body (1), is positioned behind a cab and can rotate around the axis of the main slewing mechanism in the circumferential direction;
the main arm (22) adopts a telescopic structure, the rear end of the main arm is hinged on the main rotating mechanism (20) through a pin shaft (26), and an air channel is arranged in the main arm along the axial direction;
the rear end of the two arms (27) is hinged with the front end of the main arm (22), and a pipeline channel is arranged in the two arms;
the rear end of the small arm blow nozzle assembly (29) is hinged with the front ends of the two arms (27);
one end of the main air inlet hose (21) is connected with the flow dividing device (3), and the other end of the main air inlet hose penetrates through the main rotary mechanism (20) to be connected with an air channel in the main arm (22);
one end of the main air hose (40) is connected with an air inlet of the small arm blow nozzle assembly (29), and the other end of the main air hose penetrates through the pipeline channels of the two arms (27) and is connected with an air channel in the main arm (22);
the two ends of the main arm oil cylinder (23) are respectively hinged with the main swing mechanism (20) and the main arm (22) and used for adjusting the included angle between the main arm (22) and the main swing mechanism (20);
the two ends of the telescopic oil cylinder (24) are respectively hinged with the fixed end and the telescopic end of the main arm (22) and used for adjusting the axial length of the main arm (22);
two ends of the two-arm oil cylinder (25) are respectively hinged with the main arm (22) and the two arms (27) and used for adjusting the included angle between the main arm (22) and the two arms (27);
and two ends of the small arm oil cylinder (28) are respectively hinged with the small arm blow nozzle assembly (29) and the two arms (27) and used for adjusting the included angle between the small arm blow nozzle assembly (29) and the two arms (27).
6. The snow blower of claim 5,
the main arm (22) comprises:
an outer air duct (30);
one end of the inner air duct (33) is telescopically sleeved in the outer air duct (30);
the sealing device (32) is arranged between the outer air duct (30) and the inner air duct (33) and used for sealing a radial annular gap between the inner peripheral wall of the outer air duct (30) and the outer peripheral wall of the inner air duct (33);
and two ends of the guide mechanism (31) are respectively connected with the outer air duct (30) and the inner air duct (33) and are used for keeping the inner air duct (33) coaxial when the inner air duct (33) extends and retracts in the outer air duct (30).
7. The snow blower of claim 5,
the arm blow nozzle assembly (29) comprises:
the rear end of the small arm (34) is hinged with the front ends of the two arms (27) and the small arm oil cylinder (28) through a pin shaft (26), and an air channel is arranged in the small arm;
and the blowing nozzle (38) is connected with the air channel at the front end of the small arm (34) through a blowing nozzle rotating mechanism (36) capable of rotating in the circumferential direction and is used for adapting to blowing operation surfaces at different angles.
8. The snow blower of claim 7,
and guide plates (35) used for guiding, accelerating and increasing the blowing area and the effect of airflow are arranged in the air duct and the blowing nozzle (38) of the small arm (34).
9. A snow blower as claimed in claim 8,
the blowing nozzle (38) is symmetrically provided with a plurality of pairs of guide plates (35) by taking the center line of the blowing nozzle as a symmetrical line, and the installation angles of the guide plates (35) are sequentially increased in a direction away from the center line.
10. The snow blower of claim 1,
the front end of the multi-degree-of-freedom arm support air supply assembly (2) is also provided with a distance sensor (37) used for detecting the relative distance between the multi-degree-of-freedom arm support air supply assembly and an operation target and preventing damage caused by collision during movement;
and/or
The camera (39) is used for observing the working condition and improving the working safety during working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011271182.8A CN113026648B (en) | 2020-11-13 | 2020-11-13 | Snow blowing vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011271182.8A CN113026648B (en) | 2020-11-13 | 2020-11-13 | Snow blowing vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113026648A CN113026648A (en) | 2021-06-25 |
| CN113026648B true CN113026648B (en) | 2022-06-14 |
Family
ID=76459012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011271182.8A Active CN113026648B (en) | 2020-11-13 | 2020-11-13 | Snow blowing vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113026648B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115382142A (en) * | 2022-08-18 | 2022-11-25 | 三一汽车制造有限公司 | Fire extinguishing system and working machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201801836U (en) * | 2010-09-27 | 2011-04-20 | 杜文中 | Fallen leaf recovery engineering truck |
| CA2683575A1 (en) * | 2009-10-27 | 2011-04-27 | Les Machineries Pronovost Inc. | Front lift system, vehicle fitted with such system, kit for assembling it, and associated methods of assembly and operation |
| CN202164567U (en) * | 2011-05-27 | 2012-03-14 | 中国一拖集团有限公司 | Snow blowing device of air compressor for snow remover |
| CN105546613A (en) * | 2016-02-25 | 2016-05-04 | 宁波方太厨具有限公司 | Shunting device for extractor hood and cascaded fans applying shunting device |
| CN108343017A (en) * | 2018-02-26 | 2018-07-31 | 太原科技大学 | A kind of cleanable supercharging dust exhaust apparatus of electric cleaning car |
| CN109610398A (en) * | 2019-01-26 | 2019-04-12 | 山东汇强重工科技有限公司 | A kind of pick up snow blowing truck |
| CN111225871A (en) * | 2017-10-18 | 2020-06-02 | 量子联合有限合伙公司 | System and method for drying and cleaning an aerial lift electrically insulated boom |
-
2020
- 2020-11-13 CN CN202011271182.8A patent/CN113026648B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2683575A1 (en) * | 2009-10-27 | 2011-04-27 | Les Machineries Pronovost Inc. | Front lift system, vehicle fitted with such system, kit for assembling it, and associated methods of assembly and operation |
| CN201801836U (en) * | 2010-09-27 | 2011-04-20 | 杜文中 | Fallen leaf recovery engineering truck |
| CN202164567U (en) * | 2011-05-27 | 2012-03-14 | 中国一拖集团有限公司 | Snow blowing device of air compressor for snow remover |
| CN105546613A (en) * | 2016-02-25 | 2016-05-04 | 宁波方太厨具有限公司 | Shunting device for extractor hood and cascaded fans applying shunting device |
| CN111225871A (en) * | 2017-10-18 | 2020-06-02 | 量子联合有限合伙公司 | System and method for drying and cleaning an aerial lift electrically insulated boom |
| CN108343017A (en) * | 2018-02-26 | 2018-07-31 | 太原科技大学 | A kind of cleanable supercharging dust exhaust apparatus of electric cleaning car |
| CN109610398A (en) * | 2019-01-26 | 2019-04-12 | 山东汇强重工科技有限公司 | A kind of pick up snow blowing truck |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113026648A (en) | 2021-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113026648B (en) | Snow blowing vehicle | |
| US9816462B2 (en) | Integrated thrust reverser device and aircraft engine nacelle equipped therewith | |
| RU2108941C1 (en) | Power plant for short vertical take-off and landing aircraft | |
| US10107292B2 (en) | Vacuum / blower device | |
| CN103786628B (en) | Moving multi-stage hydrostatic drive air-assisted spraying reducing dust lowering car | |
| US9376986B2 (en) | Aircraft gas turbine thrust-reversing device | |
| FR1602162A (en) | ||
| CN107485944B (en) | A kind of spray for dust suppression machine | |
| US20180094605A1 (en) | Turbofan engine for a civil supersonic aircraft | |
| CN103891698B (en) | Double-air-channel mist spray device for orchards | |
| CN109667670A (en) | A kind of adjustable valve arrangement of whirlpool control that super/hypersonic two dimensional inlet of auxiliary starts | |
| CN112373377A (en) | Dust suppression vehicle | |
| US5107675A (en) | Gas turbine engine | |
| CN209510681U (en) | Electric blower | |
| CN209689045U (en) | Air-conditioned wind tunnel structure and air conditioner with it | |
| CN115614036A (en) | Dust treatment device and dust treatment method for heading machine | |
| CN211384342U (en) | Two grades of dust removal spraying cars of construction | |
| CN104859840A (en) | Ducted power device and aircraft | |
| CN111498126B (en) | Protection device of turbofan engine | |
| CN104879227B (en) | diesel engine EGR control system and control method | |
| CN210686333U (en) | Full-hydraulic drive system of full-hydraulic spray seeding machine mud pump | |
| CN207333239U (en) | A kind of noise reducing type spraying device | |
| CN112696365B (en) | Centrifugal long-range spraying fan | |
| CN112494857A (en) | Wind-water fire extinguisher | |
| CN2372905Y (en) | Pipe-coiled capstan rotary sprayer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |