CN111282181B - Spreading system and sand throwing fire truck - Google Patents
Spreading system and sand throwing fire truck Download PDFInfo
- Publication number
- CN111282181B CN111282181B CN202010226927.2A CN202010226927A CN111282181B CN 111282181 B CN111282181 B CN 111282181B CN 202010226927 A CN202010226927 A CN 202010226927A CN 111282181 B CN111282181 B CN 111282181B
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- impeller
- auger
- sand
- throwing
- fire
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Classifications
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C27/00—Fire-fighting land vehicles
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/42—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with mechanical connection between sensor and actuator, e.g. rods, levers
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C99/00—Subject matter not provided for in other groups of this subclass
- A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
- A62C99/0045—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using solid substances, e.g. sand, ashes; using substances forming a crust
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
本发明公开一种抛撒系统和抛沙灭火车，抛撒系统包括：驱动装置；叶轮，所述驱动装置与所述叶轮驱动连接以驱动所述叶轮旋转，所述叶轮用于抛出消防沙；绞龙，所述驱动装置与绞龙驱动连接以驱动所述绞龙旋转，所述绞龙用于向所述叶轮输送所述消防沙；绞龙传动装置，连接于所述驱动装置与所述绞龙之间，所述驱动装置通过所述绞龙传动装置驱动所述绞龙旋转，所述绞龙传动装置包括离合器。应用本发明提供的抛撒系统助于解决抛沙灭火车工作时消防沙堵料问题。
The present invention discloses a scattering system and a sand throwing fire extinguishing vehicle. The scattering system comprises: a driving device; an impeller, the driving device is connected to the impeller to drive the impeller to rotate, and the impeller is used to throw out fire-fighting sand; an auger, the driving device is connected to the auger to drive the auger to rotate, and the auger is used to transport the fire-fighting sand to the impeller; an auger transmission device, connected between the driving device and the auger, the driving device drives the auger to rotate through the auger transmission device, and the auger transmission device comprises a clutch. The scattering system provided by the present invention helps to solve the problem of fire-fighting sand blocking when the sand throwing fire extinguishing vehicle is working.
Description
Technical Field
The invention relates to the field of emergency rescue machinery, in particular to a throwing system and a sand throwing fire extinguishing vehicle.
Background
The sand throwing fire extinguishing vehicle can be used for extinguishing special fires avoiding water, foam and carbon dioxide, and plays a great role in improving the fire extinguishing efficiency, reducing the rescue danger and the like. The sand throwing fire extinguishing vehicle disclosed in the China patent application CN109896528A shown in FIG. 1 mainly comprises a sand box assembly and a throwing system, wherein the sand box assembly comprises a container 601 for storing the sand, a feeding bottom plate 602 which is arranged at the bottom of the container and can convey the sand to the auger 603, and the auger 603 which is used for throwing the sand into the throwing system, the throwing system 7 comprises a mounting bracket 701, a rotatable impeller 702 for throwing the fire fighting outwards, and a throwing cylinder 703 which is arranged in the throwing direction of the impeller, and the fire fighting sand is thrown outwards through the throwing cylinder under the centrifugal throwing action of the impeller 702.
The impeller of the throwing system of the sand throwing fire-extinguishing vehicle in the prior art is mainly in rigid connection transmission with the auger, and once excessive auger feeding or throwing barrel blocking of the impeller occurs, the sand throwing fire-extinguishing vehicle can be caused to be piled up at the auger or the impeller, and the auger can not rotate due to larger resistance caused by the sand throwing accumulation, so that the impeller can not throw out the fire-extinguishing sand through centrifugal throwing, and the sand throwing fire-extinguishing vehicle can not work normally due to blocking.
Disclosure of Invention
The invention aims to provide a sand throwing fire extinguishing vehicle which is helpful for solving the problem of fire fighting sand blocking during working.
The first aspect of the invention discloses a throwing system of a sand throwing fire extinguishing vehicle, which comprises:
A driving device;
The driving device is in driving connection with the impeller to drive the impeller to rotate, and the impeller is used for throwing out fire-fighting sand;
the driving device is in driving connection with the auger to drive the auger to rotate, and the auger is used for conveying the fire-fighting sand to the impeller;
The auger transmission device is connected between the driving device and the auger, the driving device drives the auger to rotate through the auger transmission device, and the auger transmission device comprises a clutch.
In some embodiments, the clutch is an electromagnetic clutch.
In some embodiments, the system further comprises a blockage detection device for detecting whether the sand throwing fire truck is blocked when throwing sand.
In some embodiments, the dispensing system further comprises a control device in signal connection with the blockage detection device and the clutch and configured to control the closing and opening of the clutch according to the detection result of the blockage detection device.
In some embodiments, the jam detection device includes a torque sensor that detects the magnitude of the torque of the impeller and/or the auger.
In some embodiments, the blockage detection device includes a vibration sensor that detects the magnitude of vibration of the impeller and/or the auger.
In some embodiments, the dispensing system further comprises an impeller drive disposed between the drive and the impeller, the drive driving rotation of the impeller by the impeller drive.
In some embodiments, the drive device comprises a hydraulic motor, the impeller transmission device further comprises a first speed reducer, a first coupler, a second coupler and a transmission shaft, the hydraulic motor and the first speed reducer are connected through the first coupler, the first speed reducer and the transmission shaft are connected through the second coupler, and the transmission shaft is connected with the impeller.
In some embodiments, the auger transmission is disposed between the impeller and the auger.
In some embodiments, the impeller transmission comprises a first speed reducer, the auger transmission comprises a second speed reducer connected with the clutch, the second speed reducer is arranged between the clutch and the auger, the power input end of the first speed reducer is at right angles to the power output end, and the power input end of the second speed reducer is at right angles to the power output end.
The second aspect of the invention discloses a sand throwing fire extinguishing vehicle, which comprises the throwing system.
Based on the throwing system provided by the invention, the driving device drives the auger through the auger transmission device provided with the clutch, when the sand throwing fire extinguishing vehicle works to block materials, the clutch is disconnected to cut off the power of the auger, so that the auger is prevented from continuously rotating and supplying sand throwing control to the impeller, the blocking of the impeller is prevented from being aggravated, and meanwhile, the load of the driving device is reduced, so that the driving device can drive the impeller to rotate to centrifugally throw blocked fire extinguishing sand, and the blocking condition of the sand throwing fire extinguishing vehicle is reduced and eliminated.
The sand throwing fire-fighting vehicle provided by the invention also has corresponding beneficial effects.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 is a schematic structural view of a sand blasting fire truck of the prior art;
fig. 2 is a schematic view of a part of the structure of a sand blasting fire-fighting vehicle according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Spatially relative terms, such as "above," "upper" and "upper surface," "above" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the process is carried out, the exemplary term "above" may be included. Upper and lower. Two orientations below. The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The throwing system of the sand throwing fire extinguishing vehicle shown in fig. 2 comprises an impeller 6, a driving device and a packing auger 9.
The driving device is in driving connection with the auger to drive the auger to rotate, and the auger is used for conveying the sand elimination and prevention to the impeller;
the auger transmission device is connected between the driving device and the auger, the driving device drives the auger to rotate through the auger transmission device, and the auger transmission device comprises a clutch.
The impeller 6 is used for rotating to centrifugally throw out fire fighting sand outwards, the driving device is in driving connection with the impeller 6 to drive the impeller 6 to rotate, the driving device is in driving connection with the auger 9 to drive the auger 9 to rotate, the auger 9 is connected with the driving device through an auger transmission device, the driving device drives the auger 9 to rotate through the auger transmission device to convey fire fighting sand to the impeller 6, and the auger transmission device comprises a clutch 7.
The driving device may independently drive the impeller 6 and the auger 9 to rotate, and in some embodiments, the driving device may also drive the auger 9 to rotate, and then transmit power to the impeller 6 through the auger 9 to indirectly drive the impeller 6 to rotate, where the auger 9 is connected between the driving device and the impeller 6. In some embodiments, as shown in fig. 2, the driving device may further drive the impeller 6 to rotate, and then transmit power to the auger 9 through the impeller 6 to indirectly drive the auger 9 to rotate, where the auger transmission device is connected between the impeller 6 and the auger 9.
The throwing system of the embodiment can conveniently cut off the driving of the auger 9 by the driving device without cutting off the driving of the impeller 6 by providing the auger transmission device with the clutch 7. For example, in the embodiment in which the driving device shown in fig. 2 drives the impeller 6 to rotate first, and then the impeller 6 transmits power to the auger 9 to indirectly drive the auger 9 to rotate, when the sand-throwing fire extinguishing vehicle works, the clutch 7 is closed, the driving device drives the impeller 6 and the auger 9 to rotate, the impeller 6 transmits power to the auger 9 through the auger transmission device to rotate the auger 9, the auger 9 rotates to convey fire-fighting sand to the impeller 6, the rotating impeller 6 throws the fire-fighting sand conveyed by the auger 9 outwards through centrifugal force, and the thrown fire-fighting sand is outwards output through the throwing barrel arranged in the throwing direction of the impeller 6 to perform fire-extinguishing operation. When the sand throwing fire extinguishing vehicle is blocked in the working process, for example, the packing auger 9 conveys excessive fire-fighting sand to the impeller 6, so that when the fire-fighting sand near the impeller 6 is blocked near the impeller 6, for example, a throwing barrel, the clutch 7 of the transmission device is disconnected, the transmission between the impeller 6 and the packing auger 9 is disconnected, the power of the driving device is not transmitted to the packing auger 9 any more, the packing auger 9 stops rotating, the load of the driving device is reduced, the impeller 6 is driven to rotate, the blocked fire-fighting sand is centrifugally thrown out, after the blocking of the sand throwing fire extinguishing vehicle is eliminated, the clutch 7 is closed, and the sand throwing fire extinguishing vehicle can work normally.
According to the throwing system, the driving device drives the auger 6 through the auger transmission device provided with the clutch 7, when the sand throwing fire-extinguishing vehicle works to block materials, the clutch 7 can be disconnected to cut off the power of the auger 9, the auger 9 is prevented from continuously rotating and supplying sand throwing control to the impeller 6, the blocking materials of the impeller 6 are prevented from being aggravated, meanwhile, the load of the driving device is reduced, the driving device can drive the impeller 6 to normally rotate so as to centrifugally throw blocked fire-extinguishing sand, and the blocking situation of the sand throwing fire-extinguishing vehicle is reduced and eliminated.
In some embodiments, the clutch 7 is an electromagnetic clutch, and the clutch is an electromagnetic clutch, so that the opening and closing of the clutch can be controlled electrically, and the operation is more convenient.
In some embodiments, the system further comprises a blockage detection device for detecting whether the sand throwing fire truck is blocked when throwing sand.
In some embodiments, the dispensing system further comprises a control device in signal connection with the blockage detection device and the clutch 7, the control device being configured to control the closing and opening of the clutch 7 in accordance with the detection result of the blockage detection device. The control device of the embodiment detects whether the sand throwing fire-extinguishing vehicle is blocked or not through the blocking detection device and automatically controls the opening or closing of the clutch 7, so that the sand throwing fire-extinguishing vehicle can be automatically cleaned when blocked, and the safety and the automation capability of the sand throwing fire-extinguishing vehicle are improved.
In some embodiments, the blockage detection means comprises a torque sensor that detects the amount of torque of the impeller 6 and/or the auger 9. The torque sensor detects the torque of the impeller 6 and the auger 9, when the sand throwing fire extinguishing vehicle is blocked, namely the impeller 6 or the auger 9 is blocked, the rotation of the impeller 6 or the auger 9 is blocked, the torque of the impeller 6 or the auger 9 is suddenly increased, and when the torque of the impeller 6 or the auger 9 detected by the torque sensor is received by the control device and is increased to exceed a threshold value, the control device judges that the sand throwing fire extinguishing vehicle is blocked, and the control device can control the clutch 7 to be disconnected by signals so as to cut off the power transmitted to the auger 9.
In some embodiments, the blockage detection means comprises a vibration sensor that detects the magnitude of the vibration of the impeller 6 and/or auger 9. When the sand throwing fire extinguishing vehicle is blocked, the vibration of the impeller 6 or the auger 9 is also increased, and whether the sand throwing fire extinguishing vehicle is blocked during working can be judged by detecting the vibration degree of the impeller 6 or the auger 9.
In some embodiments, the dispensing system further comprises an impeller drive disposed between the drive means and the impeller 6, the drive means driving rotation of the impeller 6 via the impeller drive.
In some embodiments, the driving device comprises a hydraulic motor 1, the impeller transmission device comprises a first speed reducer 3, a first coupler 2, a second coupler 4 and a transmission shaft 5 connected with an impeller 6, the hydraulic motor 1 and the first speed reducer 3 are connected through the first coupler 2, and the first speed reducer 3 and the transmission shaft 5 are connected through the second coupler 4. The sand throwing fire-extinguishing vehicle is also provided with a hydraulic pump, the hydraulic pump supplies oil to the hydraulic motor 1 by taking force from the chassis of the sand throwing fire-extinguishing vehicle, and the hydraulic motor 1 drives the impeller 6 to rotate through the transmission shaft 5 after reducing speed and increasing torque through the first speed reducer.
In some embodiments, as shown in fig. 2, an auger transmission is provided between the impeller 6 and said auger 9. In some embodiments, the first coupling 2 and the second coupling 4 are elastic couplings, the hydraulic motor 1 is mounted on a mounting bracket of the sand blasting fire-extinguishing vehicle, a power input end of the first speed reducer 3 is provided with a flange, the power input end of the first speed reducer 3 is coaxial with a power output end of the hydraulic motor 1, one end of the first coupling 2 is connected with the power output end of the hydraulic motor 1 through a spline, and the other end is connected with the power input end of the first speed reducer 3 through a flat key. One end of the second coupler 4 is connected with the power output end of the first speed reducer 3 through a flat key, and the other end of the second coupler 4 is connected with the power input end of the transmission shaft 5 through a flat key. The power input end of the impeller 6 is connected with the power output end of the transmission shaft 5 through a bolt, the power output end of the impeller 6 is connected with the power input end of the clutch through a flat key, the power output end of the clutch 7 is connected with the power input end of the second speed reducer 8 through a flat key, and the power output end of the second speed reducer 8 is connected with the power input shaft of the auger 9 through a spline.
In some embodiments, the impeller transmission device comprises a first speed reducer 3, the auger transmission device comprises a second speed reducer 8, the clutch 7 is connected with the auger 9 through the second speed reducer 8, the power input end of the first speed reducer 3 is at right angles to the power output end, and the power input end of the second speed reducer 8 is at right angles to the power output end. The arrangement of the auger 9, the auger transmission device, the impeller 6, the impeller transmission device and the driving device of the sand throwing fire extinguishing vehicle is more compact, and the space occupied by a throwing system is reduced.
In some embodiments, the drive means comprises a power means such as an engine or motor.
In some embodiments, the control device described above may be a general purpose Processor, programmable logic controller (Programmable Logic Controller, abbreviated as PLC), digital signal Processor (DIGITAL SIGNAL Processor, abbreviated as DSP), application Specific Integrated Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, abbreviated as FPGA), or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, or any suitable combination thereof for performing the functions described herein.
In some embodiments, a sand blasting fire truck is also disclosed, including the above-described system for blasting.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present invention may be modified or some technical features may be equivalently replaced, and they are all included in the scope of the technical solution of the present invention as claimed.
Claims (5)
1. A system for throwing sand to extinguish a fire in a vehicle, comprising:
A driving device;
The impeller (6), drive arrangement with impeller (6) drive connection is in order to drive impeller (6) is rotatory, impeller (6) are used for throwing out and remove the sand prevention, throw system still include impeller transmission, impeller transmission set up in drive arrangement with between impeller (6), drive arrangement passes through impeller transmission drive impeller (6) are rotatory, drive arrangement includes hydraulic motor (1), impeller transmission still includes first speed reducer (3), first shaft coupling (2), second shaft coupling (4) and transmission shaft (5), hydraulic motor (1) with first speed reducer (3) are through first shaft coupling (2) connection, first speed reducer (3) with transmission shaft (5) are through second shaft coupling (4) connection, transmission shaft (5) are connected with impeller (6);
The auger (9) is in driving connection with the auger (9) to drive the auger (9) to rotate, and the auger (9) is used for conveying the fire-fighting sand to the impeller (6);
The auger transmission device is connected between the driving device and the auger (9) and between the impeller and the auger, the driving device drives the impeller firstly and then drives the auger (9) to rotate through the impeller and the auger transmission device, the auger transmission device comprises a clutch (7), the auger transmission device further comprises a second speed reducer (8) connected with the clutch (7), the second speed reducer (8) is arranged between the clutch (7) and the auger (9), the power input end of the first speed reducer (3) is at right angle with the power output end, when the sand throwing fire extinguishing vehicle is used for blocking materials, the power of the auger is cut off through disconnecting the clutch, the auger is prevented from continuing to rotate and supplying sand elimination and prevention to the impeller, the load of the driving device is reduced, the driving device can drive the impeller to rotate to drive the sand throwing vehicle to eliminate the blocked materials, and the fire extinguishing conditions of the centrifugal sand throwing are eliminated; the throwing system further comprises a blocking detection device, wherein the blocking detection device is used for detecting whether the sand throwing fire-fighting truck is blocked or not when throwing sand, the throwing system further comprises a control device, the control device is in signal connection with the blocking detection device and the clutch, and the control device is configured to control the closing and the opening of the clutch (7) according to the detection result of the blocking detection device.
2. A fire-throwing system of a fire-throwing vehicle according to claim 1, characterized in that the clutch (7) is an electromagnetic clutch.
3. A sand blasting fire-extinguishing vehicle's throwing system according to claim 1, characterized in that the blockage detection means comprise a torque sensor detecting the torque magnitude of the impeller (6) and/or the auger (9).
4. A system for throwing sand fire extinguishing vehicle according to claim 1, characterized in that the blockage detection means comprise vibration sensors for detecting the magnitude of vibrations of the impeller (6) and/or the auger (9).
5. A sand blasting machine comprising a system as claimed in any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010226927.2A CN111282181B (en) | 2020-03-27 | 2020-03-27 | Spreading system and sand throwing fire truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010226927.2A CN111282181B (en) | 2020-03-27 | 2020-03-27 | Spreading system and sand throwing fire truck |
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| Publication Number | Publication Date |
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| CN111282181A CN111282181A (en) | 2020-06-16 |
| CN111282181B true CN111282181B (en) | 2025-02-11 |
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| CN202010226927.2A Active CN111282181B (en) | 2020-03-27 | 2020-03-27 | Spreading system and sand throwing fire truck |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106688437A (en) * | 2015-08-04 | 2017-05-24 | 常州东风农机集团有限公司 | Air-suction impurity-removing chopping device used for harvester |
| CN208771641U (en) * | 2018-07-23 | 2019-04-23 | 苏州优耐特机械制造有限公司 | A kind of horizontal spiral centrifuge that can clear up putty automatically |
| CN109806528A (en) * | 2019-03-04 | 2019-05-28 | 徐工集团工程机械有限公司 | A kind of the sand throwing extinguishing device and sand throwing extinguishing vehicle of independent power |
| CN211885071U (en) * | 2020-03-27 | 2020-11-10 | 徐工集团工程机械有限公司 | Throwing system and sand throwing fire extinguishing vehicle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1007825A1 (en) * | 1981-11-05 | 1983-03-30 | Центральное Проектно-Конструкторское И Технологическое Бюро Главсантехпрома Минстройматериалов Ссср | Sand slinging moulding machine |
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2020
- 2020-03-27 CN CN202010226927.2A patent/CN111282181B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106688437A (en) * | 2015-08-04 | 2017-05-24 | 常州东风农机集团有限公司 | Air-suction impurity-removing chopping device used for harvester |
| CN208771641U (en) * | 2018-07-23 | 2019-04-23 | 苏州优耐特机械制造有限公司 | A kind of horizontal spiral centrifuge that can clear up putty automatically |
| CN109806528A (en) * | 2019-03-04 | 2019-05-28 | 徐工集团工程机械有限公司 | A kind of the sand throwing extinguishing device and sand throwing extinguishing vehicle of independent power |
| CN211885071U (en) * | 2020-03-27 | 2020-11-10 | 徐工集团工程机械有限公司 | Throwing system and sand throwing fire extinguishing vehicle |
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| CN111282181A (en) | 2020-06-16 |
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