Dangerous behavior monitoring alarm device based on security monitoring system
By introducing hazardous behavior monitoring and alarm devices into the security monitoring system, deep learning algorithms and multi-system modules work together, automated identification and alarm of hazardous behaviors are achieved, and problem of untimely identification in the existing technology is solved, and monitoring efficiency and safety are improved.
Patent Information
- Application Number
- CN202510451821.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2025-07-11
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing security monitoring system cannot identify and alarm in a timely and accurate manner, resulting in high labor costs and easy omissions, affecting the safety of life and property.
The hazardous behavior monitoring and alarm device based on the security monitoring system is adopted, including monitoring module, image acquisition module, data processing module, storage module, alarm module and communication module. The deep learning algorithm is used to identify dangerous behaviors and alarm through sound-light alarms and wireless communication.
It realizes automatic monitoring and alarm of dangerous behaviors, reduces dependence on manual monitoring, improves identification accuracy, promptly detects dangerous behaviors, ensures the safety of life and property, and reduces labor costs.
Smart Images

Figure CN120299166A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of security monitoring, and specifically, relates to a dangerous behavior monitoring and alarm device based on a security monitoring system. Background Art
[0002] With the development of society, people's requirements for security prevention are getting higher and higher, making security monitoring systems widely used in public places, enterprises, residential communities, etc.
[0003] Currently, most traditional security monitoring systems can only achieve basic video monitoring functions. Facing complex and diverse dangerous behaviors, such as sudden fights among people in the monitoring area, and the situation where the elderly and patients accidentally fall in public places and are not helped up for a long time, they cannot identify and alarm in a timely and accurate manner. Usually, it relies on the way of manually viewing the monitoring pictures in real time, which not only has high labor costs, but also is extremely prone to omissions due to factors such as personnel fatigue and distraction, resulting in dangerous events not being detected and processed in time, posing a potential threat to people's lives and property. In view of this, the present invention is specifically proposed. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a dangerous behavior monitoring and alarm device based on a security monitoring system that can overcome or at least partially solve the above problems.
[0005] To solve the above technical problem, the basic concept of the technical solution adopted by the present invention is:
[0006] A dangerous behavior monitoring and alarm device based on a security monitoring system, comprising: a monitoring module for collecting video images of a monitoring area; an image acquisition module connected to the monitoring module for converting the analog video signal collected by the monitoring module into a digital signal; a data processing module connected to the image acquisition module, using a high-performance processor, built-in with a dangerous behavior recognition algorithm, for analyzing and processing the input digital video images to identify dangerous behaviors therein; a storage module connected to the data processing module for storing video image data and relevant data for dangerous behavior recognition; an alarm module connected to the data processing module, including an audible and visual alarm for emitting an alarm signal when the data processing module identifies a dangerous behavior; a communication module connected to the alarm module for transmitting alarm information to the mobile terminals or monitoring centers of relevant personnel.
[0007] Preferably, the dangerous behavior recognition algorithm adopts a deep learning algorithm. By training on dangerous behavior sample data, a dangerous behavior recognition model is constructed, and this model can analyze and judge the human body movements, postures, and behavior patterns in video images.
[0008] Preferably, the alarm module is provided with an alarm threshold. When the dangerous behavior characteristic parameters in the video image reach or exceed the alarm threshold, the alarm module is triggered to give an alarm.
[0009] Preferably, the communication module adopts a wireless communication method and is used to send the alarm information to relevant personnel in the form of text messages and push messages.
[0010] Preferably, the monitoring module includes a housing, a monitoring camera, and a mirror. The mirror is fixedly installed on the housing, and the monitoring camera is arranged inside the housing and faces the mirror.
[0011] Furthermore, it further includes a fixed seat, a fixed rod, a mounting seat, and a connecting seat. One end of the fixed rod is fixedly connected to the fixed seat. An installation hole is provided on the fixed seat. The mounting seat is detachably connected to the fixed rod. The connecting seat is fixedly connected to the housing and is rotatably connected to the mounting seat. An arc-shaped guide groove is provided on the connecting seat. A bolt is inserted into the mounting seat, and the bolt is inserted into the guide groove. A nut is threadedly connected to the bolt, and the nut abuts against the outer wall of the connecting seat.
[0012] Furthermore, a plug-in block is fixedly connected to the mounting seat. A plug-in groove for cooperating with the plug-in block is provided on the fixed rod. A sliding groove communicating with the plug-in groove is provided on the fixed rod. A clamping block is slidably connected in the sliding groove. A spring is fixedly connected between the sliding groove and the clamping block. A positioning groove for cooperating with the clamping block is provided on the plug-in block. The lower end surface of the clamping block is inclined.
[0013] Furthermore, a pull rope is fixedly connected to the clamping block, and a pull ring is fixedly connected to one end of the pull rope passing through the lower end surface of the fixed rod.
[0014] In order to keep the surface of the mirror clean and improve the clarity of the video picture captured by the monitoring camera, furthermore, one end of the housing close to the mirror is fixedly connected with a dust suction cover and a plurality of air nozzles. The air nozzles are located above the dust suction cover. The air nozzles are inclined towards the mirror. A box body is fixedly installed on the fixed rod. An installation groove and a filtering cavity are provided on the box body. A plurality of filter meshes are inserted into the filtering cavity. The pore diameters of the filter holes of the plurality of filter meshes are arranged in decreasing order. The dust suction cover is communicated with the filtering cavity through a dust suction pipe. A dust suction pump is fixedly installed in the installation groove. The input end of the dust suction pump is communicated with the filtering cavity, and the output end is communicated with the air nozzles.
[0015] In order to be used to reduce the temperature inside the housing, furthermore, a cooling pipe is arranged inside the housing. The air inlet end of the cooling pipe is communicated with the output end of the dust suction pump through a first air delivery pipe, and the air outlet end of the cooling pipe is communicated with the air nozzles through a second air delivery pipe.
[0016] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:
[0017] The present invention realizes the automatic monitoring and alarming of dangerous behaviors, greatly reduces the dependence on manual monitoring, improves the efficiency of security monitoring, and reduces the labor cost;
[0018] By adopting advanced deep learning algorithms and the collaborative work of multiple system modules, the accuracy rate of dangerous behavior recognition is greatly improved, so that dangerous behaviors can be discovered in a timely and accurate manner, precious time can be gained for the handling of dangerous events, and the life and property safety of people are effectively guaranteed;
[0019] The inhaled air is filtered through multiple filter meshes, ensuring the cleanliness of the air entering the jet nozzle and the cooling pipe, and avoiding damage to the equipment caused by dust. Secondly, the air flow generated by the dust suction pump not only realizes the cleaning function of the mirror surface, but also cools the equipment inside the housing. This not only ensures the shooting clarity of the monitoring camera, avoids affecting the monitoring effect due to the dirty mirror surface, but also effectively reduces the working temperature of the equipment, improves the stability of the equipment, and extends the service life of the equipment. Description of the Drawings
[0020] Figure 1 is the structural schematic diagram of the present invention Figure 1 ;
[0021] Figure 2 is the structural schematic diagram of the present invention Figure 2 ;
[0022] Figure 3 is the cross-sectional view of the housing and the box body of the present invention;
[0023] Figure 4 is the cross-sectional view of the plug-in block and the fixing rod of the present invention;
[0024] Figure 5 is the structural unfolded schematic diagram of the mounting seat and the connecting seat of the present invention;
[0025] Figure 6 is of the present invention Figure 4 enlarged view of part A;
[0026] Figure 7 is the system flow chart of the present invention.
[0027] In the figure: 1. Housing; 101. Mirror surface; 2. Mounting seat; 201. Connecting seat; 202. Bolt; 203. Nut; 204. Guide groove; 3. Fixed seat; 301. Fixed rod; 302. Insertion block; 303. Positioning groove; 304. Chute; 305. Clamping block; 306. Spring; 307. Pulling rope; 308. Pulling ring; 4. Box body; 401. Mounting groove; 402. Filter chamber; 403. Dust suction pump; 404. Filter net; 405. Dust suction pipe; 406. Dust suction hood; 5. Cooling pipe; 501. First gas transmission pipe; 502. Second gas transmission pipe; 503. Jet nozzle. Detailed implementation manners
[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.
[0029] Embodiment 1: Refer to Figure 7 , a dangerous behavior monitoring and alarming device based on a security monitoring system, including:
[0030] A monitoring module, configured to collect video images of a monitored area, continuously collect video images of the monitored area at a preset frame rate, and transmit the collected analog video signal to an image acquisition module through a coaxial cable or a network cable;
[0031] An image acquisition module, connected to the monitoring module, converting the analog video signal collected by the monitoring module into a digital signal, and transmitting it to a data processing module according to a preset data format;
[0032] A data processing module, connected to the image acquisition module, using a high-performance processor, memory mapping or DMA technology, quickly reading image data to analyze and process the input digital video image, built-in with a dangerous behavior recognition algorithm to identify dangerous behaviors therein. The dangerous behavior recognition algorithm adopts a deep learning algorithm, trains with dangerous behavior sample data to construct a dangerous behavior recognition model. This model analyzes and processes the video image, and can judge the human body movements, postures, and behavior patterns in the video image, such as detecting and judging the number of changes in human body limb movements, the amplitude angles of movements, the changes in human body posture angles, and the vertical distance changes in the human body center of gravity;
[0033] A storage module, connected to the data processing module, for storing video image data and relevant data for dangerous behavior recognition;
[0034] The alarm module, connected to the data processing module, includes an audible and visual alarm. It emits an alarm signal when the data processing module identifies a dangerous behavior. The alarm module is set with an alarm threshold. When the characteristic parameters of the dangerous behavior in the video image reach or exceed the alarm threshold, the alarm module is triggered to alarm;
[0035] The alarm threshold includes the threshold of the change frequency of the human body's limb movements, the threshold of the movement amplitude angle, the threshold of the change angle of the human body's posture, and the threshold of the change distance of the human body's center of gravity in the vertical direction;
[0036] For example, the threshold of the change frequency of the human body's limb movements is 5 times / 10 seconds, the threshold of the movement amplitude angle is 30 degrees, the threshold of the change angle of the human body's posture is 60 degrees / 2 seconds, and the threshold of the change distance of the human body's center of gravity in the vertical direction is 0.5 meters;
[0037] When the change frequency of the human body's limb movements is greater than 5 times / 10 seconds and the movement amplitude angle is greater than 30 degrees, it is judged as a fighting behavior;
[0038] When the change angle of the human body's posture is greater than 60 degrees / 2 seconds and the change distance of the human body's center of gravity in the vertical direction is greater than 0.5 meters, it is judged as a person falling behavior.
[0039] The audible and visual alarm is set with an alarm sound frequency between 800 - 1200 Hz, the sound duration is 30 seconds, and the light flashing frequency is 3 - 5 times per second to achieve a prominent effect.
[0040] The communication module, connected to the alarm module, is used to transmit the alarm information to the mobile terminal or monitoring center of relevant personnel. The communication module uses a wireless communication method to send the alarm information to relevant personnel in the form of text messages and push messages. The content of the alarm information includes "alarm time, monitoring location, type of dangerous behavior". After receiving the alarm information, relevant personnel can, through the remote access function of the monitoring system, view the monitoring screen in real time, understand the on-site situation, and take corresponding treatment measures according to the actual situation, such as arranging security personnel to go to the scene to stop the dangerous behavior, notifying the police, etc.
[0041] Example 2: Refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 A dangerous behavior monitoring and alarm device based on a security monitoring system is basically the same as that in Example 1. Further, the monitoring module includes a housing 1, a monitoring camera, and a mirror 101. The mirror 101 is fixedly installed on the housing 1, and the monitoring camera is arranged inside the housing 1 and faces the mirror 101.
[0042] It further includes a fixed seat 3, a fixed rod 301, a mounting seat 2, and a connecting seat 201. One end of the fixed rod 301 is fixedly connected to the fixed seat 3. An installation hole is provided on the fixed seat 3. The mounting seat 2 is detachably connected to the fixed rod 301. The connecting seat 201 is fixedly connected to the housing 1 and is rotatably connected to the mounting seat 2. An arc-shaped guide groove 204 is provided on the connecting seat 201. A bolt 202 is inserted into the mounting seat 2, and the bolt 202 is inserted into the guide groove 204. A nut 203 is threadedly connected to the bolt 202, and the nut 203 abuts against the outer wall of the connecting seat 201.
[0043] During use, through the installation hole provided on the fixed seat 3, an expansion bolt or other suitable fixing member is used to firmly install the fixed seat 3 on the wall. After installation, when the angle of the monitoring camera needs to be adjusted, first loosen the nut 203, and then rotate the connecting seat 201. Since the connecting seat 201 is rotatably connected to the mounting seat 2 and the bolt 202 slides in the guide groove 204, the connecting seat 201 can be rotated by a certain angle around the bolt 202, thereby driving the monitoring camera in the housing 1 to change the shooting angle. After adjusting to the appropriate angle, tighten the nut 203 to fix the connecting seat 201 at the current position.
[0044] In summary, the rotational connection method between the connecting seat 201 and the mounting seat 2 through the bolt 202 and the guide groove 204 makes the angle adjustment of the monitoring camera relatively flexible. Therefore, the operator can easily adjust the shooting angle of the monitoring camera according to the actual monitoring requirements to ensure that the monitoring area can be fully covered, greatly improving the practicability and adaptability of the monitoring module.
[0045] Example 3: Refer to Figure 4 、 Figure 5 、 Figure 6 A dangerous behavior monitoring and alarm device based on a security monitoring system is basically the same as that in Example 1. Further, a plug-in block 302 is fixedly connected to the mounting seat 2. A plug-in slot matching with the plug-in block 302 is provided on the fixed rod 301. A sliding groove 304 communicating with the plug-in slot is provided on the fixed rod 301. A clamping block 305 is slidably connected in the sliding groove 304. A spring 306 is fixedly connected between the sliding groove 304 and the clamping block 305. A positioning groove 303 matching with the clamping block 305 is provided on the plug-in block 302. The lower end surface of the clamping block 305 is inclined.
[0046] When the mounting base 2 is connected to the fixing rod 301, since the lower end surface of the clamping block 305 is inclined, when the mounting base 2 with the plug-in block 302 is inserted into the plug-in slot of the fixing rod 301, the plug-in block 302 will squeeze the clamping block 305. After being squeezed, the clamping block 305 slides into the sliding groove 304 against the elastic force of the spring 306. At this time, the spring 306 is compressed. When the positioning groove 303 on the plug-in block 302 is aligned with the clamping block 305, the clamping block 305 quickly springs into the positioning groove 303 under the elastic force of the spring 306, thus realizing the quick installation of the mounting base 2 and the fixing rod 301, and there is no need to use additional tools for cumbersome operations such as bolt fastening, greatly improving the installation efficiency;
[0047] At the same time, the clamping method of the clamping block 305 and the positioning groove 303 ensures the stability of the connection. During the use of the monitoring device, it can effectively prevent loosening between the mounting base 2 and the fixing rod 301, ensuring that the monitoring camera is always in a stable working state and guaranteeing the monitoring effect.
[0048] A pull rope 307 is fixedly connected to the clamping block 305, and one end of the pull rope 307 passing through the lower end surface of the fixing rod 301 is fixedly connected to a pull ring 308;
[0049] When it is necessary to disassemble the mounting base 2, pull the pull ring 308. The pull ring 308 drives the clamping block 305 to slide into the sliding groove 304 through the pull rope 307, so that the clamping block 305 overcomes the elastic force of the spring 306 and disengages from the positioning groove 303 on the plug-in block 302. At this time, the plug-in block 302 can be easily pulled out from the plug-in slot of the fixing rod 301 to complete the disassembly of the mounting base 2 and the fixing rod 301, enabling the operator to easily release the clamping of the clamping block 305 and the positioning groove 303 and achieve quick disassembly without the need to rely on other complex tools, just by pulling the pull ring 308. Therefore, when it is necessary to maintain, replace or adjust the position of the monitoring device, a large amount of time and labor costs can be saved, improving the work efficiency.
[0050] Example 4: Refer to Figure 1 、 Figure 2 、 Figure 3, A dangerous behavior monitoring and alarm device based on a security monitoring system, which is basically the same as Embodiment 1. Further, one end of the housing 1 close to the mirror surface 101 is fixedly connected with a dust suction cover 406 and a plurality of jet nozzles 503. The jet nozzles 503 are located above the dust suction cover 406, and the jet nozzles 503 are inclined towards the mirror surface 101. A box body 4 is fixedly installed on the fixed rod 301. An installation groove 401 and a filtering cavity 402 are formed on the box body 4. A plurality of filter meshes 404 are inserted into the filtering cavity 402. The pore diameters of the filter holes of the plurality of filter meshes 404 are arranged in decreasing order. The dust suction cover 406 is communicated with the filtering cavity 402 through a dust suction pipe 405. A dust suction pump 403 is fixedly installed in the installation groove 401. The input end of the dust suction pump 403 is communicated with the filtering cavity 402, and the output end is communicated with the jet nozzles 503;
[0051] A cooling pipe 5 is arranged in the housing 1. The air inlet end of the cooling pipe 5 is communicated with the output end of the dust suction pump 403 through an air delivery pipe 1 501, and the air outlet end of the cooling pipe 5 is communicated with the jet nozzles 503 through an air delivery pipe 2 502;
[0052] During use, the dust suction pump 403 is started, and the dust suction pump 403 starts to work and generates suction. The outside air containing dust enters the dust suction pipe 405 through the dust suction cover 406 under the action of suction, and then enters the filtering cavity 402. In the filtering cavity 402, the air sequentially passes through a plurality of filter meshes 404 with decreasing filter hole diameters for filtering to remove the dust particles therein. The filtered clean air enters the input end of the dust suction pump 403 from the filtering cavity 402, and then is conveyed into the cooling pipe 5 from the output end of the dust suction pump 403 through the air delivery pipe 1 501, so that when the gas passes through the cooling pipe 5, it can cool the devices such as the monitoring camera in the housing 1, reduce the working temperature of the devices, improve the stability of the devices, extend the service life of the devices, and then the gas passing through the cooling pipe 5 enters the jet nozzles 503 through the air delivery pipe 2 502 and is ejected from the jet nozzles 503 and blows towards the mirror surface 101, blowing off the dust on the mirror surface 101. At the same time, with the suction of the dust suction cover 406, the blown-off dust is sucked away, keeping the mirror surface 101 clean, ensuring that the monitoring camera can clearly shoot the monitoring area, and improving the performance of the monitoring module.
[0053] The cooling pipe 5 is arranged in a bow shape. Since the bow-shaped structure can greatly extend the length of the cooling pipe 5 in the limited space of the housing 1, the contact area between the cooling pipe 5 and the heating elements such as the monitoring camera inside the housing 1 is significantly increased, so that more heat can be transferred to the cooling pipe 5 through the larger contact area and then be taken away by the air flowing in the pipe, greatly improving the cooling efficiency and being able to more effectively reduce the working temperature of the devices and ensure the stable operation of the devices.
[0054] It should be noted that in order to prevent the dust suction pipe 405 and the first air delivery pipe 501 from affecting the disassembly and assembly of the housing 1, during specific production and manufacturing, both the dust suction pipe 405 and the first air delivery pipe 501 need to be selected as flexible hoses, and the ends of the dust suction pipe 405 communicating with the filter chamber 402 and the end of the first air delivery pipe 501 communicating with the intake end of the cooling pipe 5 need to be set as detachable.
[0055] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention.
Claims
1. A dangerous behavior monitoring and alarming device based on a security monitoring system, characterized in that, Including: A monitoring module, configured to collect video images of a monitored area; An image acquisition module, connected to the monitoring module, for converting the analog video signal collected by the monitoring module into a digital signal; A data processing module, connected to the image acquisition module, adopting a high-performance processor, with a built-in dangerous behavior recognition algorithm, for analyzing and processing the input digital video images to identify dangerous behaviors therein; A storage module, connected to the data processing module, for storing video image data and relevant data of dangerous behavior recognition; An alarm module, connected to the data processing module, including an acoustic-optic alarm, for emitting an alarm signal when the data processing module identifies a dangerous behavior; A communication module, connected to the alarm module, for transmitting alarm information to the mobile terminals or monitoring centers of relevant personnel.
2. The dangerous behavior monitoring and alarm device based on the security monitoring system according to claim 1, characterized in that , The dangerous behavior recognition algorithm adopts a deep learning algorithm. By training on dangerous behavior sample data, a dangerous behavior recognition model is constructed, which can analyze and judge the human body movements, postures, and behavior patterns in video images.
3. The hazardous behavior monitoring and alarm device based on the security monitoring system according to claim 2, wherein, The alarm module is provided with an alarm threshold. When the dangerous behavior characteristic parameters in the video image reach or exceed the alarm threshold, the alarm module is triggered to alarm.
4. The dangerous behavior monitoring and alarm device based on the security monitoring system according to claim 1, characterized in that, The communication module adopts a wireless communication method for sending alarm information to relevant personnel in the form of text messages or push messages.
5. The hazardous behavior monitoring and alarming device based on a security monitoring system according to claim 1, characterized in that, The monitoring module includes a housing (1), a monitoring camera, and a mirror surface (101). The mirror surface (101) is fixedly installed on the housing (1), and the monitoring camera is arranged inside the housing (1) and faces the mirror surface (101).
6. The hazardous behavior monitoring and alarming device based on a security monitoring system according to claim 5, characterized in that, It further includes a fixed seat (3), a fixed rod (301), a mounting seat (2), and a connecting seat (201). One end of the fixed rod (301) is fixedly connected to the fixed seat (3). The fixed seat (3) is provided with a mounting hole. The mounting seat (2) is detachably connected to the fixed rod (301). The connecting seat (201) is fixedly connected to the housing (1) and is rotatably connected to the mounting seat (2). The connecting seat (201) is provided with a guiding groove (204) arranged in an arc shape. A bolt (202) is inserted into the mounting seat (2), and the bolt (202) is inserted into the guiding groove (204). A nut (203) is threadedly connected to the bolt (202), and the nut (203) abuts against the outer wall of the connecting seat (201).
7. The dangerous behavior monitoring and alarm device based on a security monitoring system according to claim 6, characterized in that, A plug-in block (302) is fixedly connected to the mounting seat (2). The fixed rod (301) is provided with a plug-in slot that cooperates with the plug-in block (302). The fixed rod (301) is provided with a sliding groove (304) communicating with the plug-in slot. A clamping block (305) is slidably connected in the sliding groove (304). A spring (306) is fixedly connected between the sliding groove (304) and the clamping block (305). The plug-in block (302) is provided with a positioning slot (303) that cooperates with the clamping block (305). The lower end surface of the clamping block (305) is inclined.
8. The dangerous behavior monitoring and alarming device based on a security monitoring system according to claim 7, characterized in that, A pull rope (307) is fixedly connected to the clamping block (305), and a pull ring (308) is fixedly connected to one end of the pull rope (307) passing through the lower end surface of the fixed rod (301).
9. The hazardous behavior monitoring and alarming device based on a security monitoring system according to claim 6, wherein, One end of the housing (1) close to the mirror surface (101) is fixedly connected with a dust suction hood (406) and a plurality of air nozzles (503). The air nozzles (503) are located above the dust suction hood (406). The air nozzles (503) are arranged obliquely towards the mirror surface (101). A box body (4) is fixedly installed on the fixed rod (301). An installation groove (401) and a filter chamber (402) are formed in the box body (4). A plurality of filter nets (404) are inserted into the filter chamber (402). The pore diameters of the filter holes of the plurality of filter nets (404) are arranged in decreasing order. The dust suction hood (406) is communicated with the filter chamber (402) through a dust suction pipe (405). A dust suction pump (403) is fixedly installed in the installation groove (401). The input end of the dust suction pump (403) is communicated with the filter chamber (402), and the output end is communicated with the air nozzles (503).
10. The dangerous behavior monitoring and alarming device based on a security monitoring system according to claim 9, characterized in that, A cooling pipe (5) is arranged in the housing (1). The air inlet end of the cooling pipe (5) is communicated with the output end of the dust suction pump (403) through an air delivery pipe one (501). The air outlet end of the cooling pipe (5) is communicated with the air nozzles (503) through an air delivery pipe two (502).