Mining ultrasonic bidirectional wind speed sensor

Abstract

The invention discloses a mining ultrasonic bidirectional wind speed sensor, and relates to the technical field of sensors, the mining ultrasonic bidirectional wind speed sensor specifically comprises a host and two ultrasonic transducers, the host is used for analyzing and displaying detection data, a circuit board is fixed in the host through studs, and an optical fiber module board, a power module board and a network module board are arranged on the circuit board; connecting ports are formed in the two sides of the host and are connected with the ultrasonic transducers through connecting wires respectively; the two ultrasonic transducers are used for wind speed detection, and a fixing support is arranged between the two ultrasonic transducers and the connecting line and used for storing and arranging the connecting line and adjusting the inclination angles of the ultrasonic transducers. According to the invention, the storage and arrangement of the connecting wire and the angle adjustment function of the ultrasonic transducer are integrated on the fixed bracket, so that the alignment angle of the ultrasonic transducer can be accurately controlled, the accuracy and reliability of a wind speed detection result are improved, the storage and arrangement time of the connecting wire is effectively saved, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sensors, and in particular to an ultrasonic bidirectional wind speed sensor for mining. Background Art

[0002] Mining ultrasonic bidirectional wind speed sensor is mainly used for wind speed and wind direction detection in various tunnels, tuyere, fan, wellhead, etc. in coal mines to ensure safe production in coal mines.

[0003] In the prior art, when a mining ultrasonic bidirectional wind speed sensor detects the wind speed in a tunnel, it is necessary to place two ultrasonic transducer probes opposite each other, that is, "look at each other", and control the angle between the line connecting the two and the wind direction after the look at each other to ensure the accuracy of the detection result. The existing method of controlling the angle of the ultrasonic transducer is mostly manual adjustment. After the two ultrasonic transducers look at each other, they are fixed with a bracket. The adjustment time is long and the angle control is inaccurate, which affects the speed measurement efficiency and the accuracy of the final result. For this reason, we provide a mining ultrasonic bidirectional wind speed sensor to solve the above problems. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides an ultrasonic bidirectional wind speed sensor for mining. Compared with the existing fixed bracket, the fixed bracket thereof integrates the storage and arrangement of connecting wires and the angle adjustment function of the ultrasonic transducer. It can not only accurately adjust and control the viewing angle of the ultrasonic transducer when detecting wind speed, thereby improving the accuracy and reliability of the wind speed detection results, but also effectively save the time for storing and arranging the connecting wires, thereby improving work efficiency.

[0005] In order to achieve the above-mentioned object, the mining ultrasonic bidirectional wind speed sensor adopted by the present invention comprises a host and two ultrasonic transducers; The host is used to analyze and display the detection data. Both sides of the host are provided with connection ports, which are respectively connected to the ultrasonic transducers through connecting lines; The two ultrasonic transducers are used for wind speed detection. During detection, the two ultrasonic transducers are arranged relative to each other and tilted, and the angle between the connecting line of the two ultrasonic transducers and the wind direction is in the range of 30 to 60 degrees; A fixed bracket is arranged between the two ultrasonic transducers and the connecting wire, and is used for adjusting the inclination angle of the ultrasonic transducer. The fixed bracket includes a base, on which a winding disk is rotatably connected, and the connecting wire is neatly coiled on the winding disk. A support frame is fixedly connected at the top center of the winding disk, and a vertical rotating shaft is rotatably installed at the bottom of the support frame, and a semicircular X-axis angle adjustment member and a Y-axis angle adjustment member are rotatably connected inside. The vertical rotating shaft is fixedly connected to the X-axis angle adjustment member, and a universal connecting member movably installed on the support frame is arranged on the inner side of the Y-axis angle adjustment member, and a movable rod is fixed on the universal connecting member, and the movable rod passes through the Y-axis angle adjustment member and the X-axis angle adjustment member in turn, and a locking nut and a mounting clamp are installed in sequence at the passed end.

[0006] As a further optimization of the scheme, the host is a flameproof and intrinsically safe device, whose outer shell is a rectangular shell with an opening at one end, and a cover plate is fixed to the open side by screws, the cover plate is provided with a window, and dust-proof glass is provided at the window. A circuit board is fixed inside the host by studs, and an optical fiber module board, a power module board and a network module board are provided on the circuit board, and a liquid crystal display is installed by studs, and the liquid crystal display is located at the window of the cover plate.

[0007] As a further optimization of the solution, a nameplate is mounted on the cover plate by screws, and a handle is provided on the top of the main housing.

[0008] As a further optimization of the scheme, the connecting port includes a bell mouth, a rubber sleeve, a gasket, a clamping nut, and a gasket. The bell mouth is installed at the opening of the port, the rubber sleeve is arranged on the inner ring of the bell mouth, and the inner ring is provided with threads. The bell mouth cooperates with the clamping nut through the threads, and the gasket is arranged on the clamping nut.

[0009] As a further optimization of the solution, when detecting wind speed, one of the two ultrasonic transducers is located at the upwind side and the other is located at the downwind side.

[0010] As a further optimization of the scheme, the movable rod is slidably matched with the X-axis angle adjustment member and the Y-axis angle adjustment member, and the middle parts of the X-axis angle adjustment member and the Y-axis angle adjustment member are provided with movable grooves that match the movable rod, and angle indicator lines are engraved on one side of the movable grooves.

[0011] As a further optimization of the solution, a balancer is installed on the top of the support frame.

[0012] As a further optimization of the solution, the winding drum includes a winding portion, a mounting disk and a pressing mechanism mounted on the mounting disk.

[0013] As a further optimization of the scheme, the pressing mechanism includes a pressure rod, a spring, and a rolling wheel. A circular groove matching the pressure rod is opened on the inner top of the mounting plate. One end of the pressure rod is rotatably installed on the inner top surface of the circular groove, and the other end is rotatably connected to the rolling wheel. The outer side of the pressure rod is connected to the side wall of the circular groove through a spring, and the rolling wheel rolls on the disk line.

[0014] As a further optimization of the scheme, a wire outlet hole matching with the connecting wire is provided on the base, and a movable groove is provided at the wire outlet end of the wire outlet hole, and a cleaning tube is movably provided in the movable groove, and both ends of the cleaning tube are connected to the end walls of the movable groove through springs, and cleaning bristles are obliquely provided on the inner wall of the cleaning tube, and the inclination direction is toward the wire outlet, and evenly distributed dust outlet holes are provided on the lower half of the cleaning tube, and a debris removal hole is provided directly below the cleaning tube on the base.

[0015] The mining ultrasonic bidirectional wind speed sensor of the present invention has the following beneficial effects: 1. The mining ultrasonic bidirectional wind speed sensor of the present invention can detect the wind speed in the tunnel more accurately by placing two ultrasonic transducers opposite to each other in the tunnel, and controlling the angle between the line of sight and the wind direction to be 30 to 60 degrees. The accuracy is highest when the angle is around 45 degrees. This detection method improves the reliability and accuracy of wind speed detection.

[0016] 2. The mining ultrasonic bidirectional wind speed sensor of the present invention has the following functions in its fixed bracket: 1. The winding function of the lower part can store and organize the connecting wires, saving storage time and avoiding the situation that the connecting wires are scattered and entangled; 2. The setting of the upper X and Y angle adjustment parts can realize the adjustment of the spatial position of the movable rod, so as to accurately control the angle between the ultrasonic transducer and the wind direction after the ultrasonic transducer is aligned with the wind direction, which can save the time of adjusting the relative position of the two ultrasonic transducers, and the control is precise, thereby improving the efficiency of the ultrasonic bidirectional wind speed sensor in detecting wind speed in the tunnel and the accuracy of the detection results; 3. The structure is exquisite, convenient to take and carry, and has good applicability.

[0017] 3. When measuring wind speed, the mining ultrasonic bidirectional wind speed sensor of the present invention uses one hand to hold the support frame and move it toward the speed measuring point, and uses the other hand to pull the connecting wire out of the base. During the pulling process, the base rotates to facilitate its smooth pulling out. At the same time, a rolling wheel is arranged on one side of the connecting wire, which plays a role in always pressing the connecting wire when the wire is pulled, thereby avoiding problems such as the connecting wire being scattered and entangled. The connecting wire can be stored conveniently and quickly, and the stored connecting wire can also avoid problems such as accidental damage. It is convenient to place and carry, and effectively improves the speed measurement efficiency of the ultrasonic bidirectional wind speed sensor.

[0018] 4. The mining ultrasonic bidirectional wind speed sensor of the present invention adjusts the viewing angle of the two ultrasonic transducers by moving the movable rod to adjust its position in space, and limits the adjustment position by means of the X-axis angle adjustment member, the Y-axis angle adjustment member and the locking nut. The angle indicator lines on the two adjustment members facilitate the operator to accurately control the viewing angle of the two ultrasonic transducers, reduce the number and time of adjustments, and further improve the speed measurement efficiency of the ultrasonic bidirectional wind speed sensor.

[0019] 5. The mining ultrasonic bidirectional wind speed sensor of the present invention is provided with a wire outlet hole in the base and a cleaning tube is added. The cleaning brush in the tube is used to clean the drawn and reeled connecting wires to different degrees, thereby cleaning the debris adhered to the connecting wires in the tunnel, avoiding scaling on the connections, reducing subsequent cleaning manpower and cleaning time, thereby reducing the use cost and ensuring the stability of the detection work.

[0020] 6. The mining ultrasonic bidirectional wind speed sensor of the present invention can realize long-distance and long-term observation and has the characteristics of explosion-proof, dust-proof, safe and reliable.

[0021] With reference to the following description and drawings, a specific embodiment of the present invention is disclosed in detail, indicating the manner in which the principle of the present invention can be adopted. It should be understood that the scope of the embodiment of the present invention is not limited thereby, and the embodiment of the present invention includes many changes, modifications and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the internal structure of the host without a cover plate of the present invention; Figure 3 It is a side sectional structural diagram of the host of the present invention; Figure 4 for Figure 2 AA section view in; Figure 5 A schematic diagram of the installation position for laneway wind speed detection of the present invention; Figure 6 is a schematic structural diagram of a fixing bracket in Embodiment 2 of the present invention; Figure 7 It is a schematic diagram of the side structure of the fixing bracket in the second embodiment of the present invention; Figure 8 for Figure 7 Enlarged view of point B in the middle; Fig. 9 This is a schematic diagram of the structure of the winding drum in the second embodiment of the present invention; Fig.10 It is a schematic diagram of the structure of the support frame in the second embodiment of the present invention; Fig.11 It is a schematic diagram of the structure of the pressure rod in the second embodiment of the present invention.

[0023] In the figure: 1. host; 2. ultrasonic transducer; 3. liquid crystal display; 4. circuit board; 5. optical fiber module board; 6. power module board; 7. network module board; 8. connection port; 81. trumpet mouth; 82. rubber sleeve; 83. gasket; 84. clamping nut; 85. gasket; 9. cover plate; 10. handle; 11. base; 12. winding reel; 121. winding part; 122. mounting plate; 123. pressure rod; 124. spring; 125. rolling wheel; 13. support frame; 14. rotating shaft; 15. X-axis angle adjustment member; 16. Y-axis angle adjustment member; 17. universal connector; 18. movable rod; 19. mounting clamp; 20. angle indicator line; 21. balancer; 22. nameplate; 23. dustproof glass; 24. locking nut; 25. cleaning tube; 26. cleaning brush; 27. debris removal hole. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0025] Embodiment 1

[0026] See the instruction manual Figures 1 to 3 The present invention provides a technical solution: a mining ultrasonic bidirectional wind speed sensor, comprising a host 1 and two ultrasonic transducers 2. The host 1 is used to analyze and display detection data, and a circuit board 4 is fixed inside by studs, and an optical fiber module board 5, a power module board 6 and a network module board 7 are arranged on the circuit board 4. A liquid crystal display 3 is also fixed and connected to the circuit board 4, and the liquid crystal display 3 can display data information such as the current baud rate, the current viewing distance value, the set viewing distance, the current viewing angle, the calibration coefficient, and the measured wind speed.

[0027] See the instruction manual Figure 1 and 3 The host 1 is a flameproof and intrinsically safe device, and its shell is a rectangular shell with an opening at one end, and a cover plate 9 is fixed to the open side by screws. The cover plate 9 has a window, and a dustproof glass 23 is provided at the window. A nameplate 22 is installed on the cover plate 9 by screws. A handle 10 is provided on the top of the shell of the host 1 for easy carrying.

[0028] See the instruction manual Figure 4, connection ports 8 are provided on both sides of the host 1, and are respectively connected to the ultrasonic transducer 2 through connecting lines. The connection port 8 includes a trumpet mouth 81, a rubber sleeve 82, a gasket 83, a clamping nut 84, and a gasket 85. The trumpet mouth 81 is installed at the opening of the port, the rubber sleeve 82 is arranged on the inner ring of the trumpet mouth 81, and the inner ring is provided with threads. The trumpet mouth 81 cooperates with the clamping nut 84 through threads, and the gasket 85 is arranged on the clamping nut 84. The structure of the connection port 8 has good sealing and insulation protection effects.

[0029] See the instruction manual Figure 5 The two ultrasonic transducers 2 are used for wind speed detection. During detection, the two ultrasonic transducers 2 are arranged relative to each other and tilted. The angle between the connecting line of the two ultrasonic transducers 2 and the wind direction is in the range of 30 to 60°, preferably 45°.

[0030] The mining ultrasonic bidirectional wind speed sensor provided in this embodiment has the following working process: Before work, it is necessary to check the status of the equipment, clean the probe surface of the ultrasonic transducer 2, repeatedly plug and unplug the terminal block into the connection port 8 for calibration, and when officially detecting the wind speed in the tunnel, hold the handle 10 and bring the host 1 to the outside of the tunnel entrance, and place the two ultrasonic transducers 2 at a suitable installation distance, one on the upwind side and the other on the leeward side. The two ultrasonic transducers 2 are set opposite to each other, and the angle between the connection line and the wind direction is 30 to 60°. Then connect the two ultrasonic transducers 2 to the corresponding connection port 8, and start the wind speed detection. After the test, the reading is displayed on the host 1, which can be read directly. The equipment is connected to the RS485 or Ethernet electrical port, and the data can also be uploaded.

[0031] Embodiment 2

[0032] See the instruction manual Figure 6 , 7and 10, a fixed bracket is provided between the two ultrasonic transducers 2 and the connecting wires, for adjusting the tilt angle of the ultrasonic transducers 2 and storing and arranging the connecting wires. The fixed bracket includes a base 11, on which a winding drum 12 is rotatably connected, and the connecting wire is neatly coiled on the winding drum 12. A support frame 13 is fixedly connected at the top center of the winding drum 12, and a balancer 21 is installed on the top of the support frame 13. A vertical rotating shaft 14 is rotatably installed at the bottom of the support frame 13, and a semicircular X-axis angle adjustment member 15 and a Y-axis angle adjustment member 16 are rotatably connected inside. The vertical rotating shaft 14 is fixedly connected to the X-axis angle adjustment member 15, and a universal connecting member 17 movably installed on the support frame 13 is provided on the inner side of the Y-axis angle adjustment member 16. A movable rod 18 is fixed on the universal connecting member 17, and the movable rod 18 is slidably connected with the X-axis angle adjustment member 15 and the Y-axis angle adjustment member 16, and one end of the movable rod 18 passing through the X-axis angle adjustment member 15 and the Y-axis angle adjustment member 16 is sequentially equipped with a locking nut 24 and a mounting clip 19.

[0033] See the instruction manual Figure 6 and 7 The middle parts of the X-axis angle adjustment member 15 and the Y-axis angle adjustment member 16 are provided with movable grooves that match the movable rod 18, and angle indicator lines 20 are engraved on one side of the movable grooves, which is convenient for the operator to accurately control and record the viewing angles of the two ultrasonic transducers 2.

[0034] See the instruction manual Fig. 9 and 11 The winding reel 12 includes a winding portion 121, a mounting disk 122 and a pressing mechanism installed on the mounting disk 122, the pressing mechanism including a pressing rod 123, a spring 124 and a rolling wheel 125. A circular groove matching the pressing rod 123 is provided on the inner top of the mounting disk 122, one end of the pressing rod 123 is rotatably mounted on the inner top surface of the circular groove, and the other end is rotatably connected to the rolling wheel 125. The outer side of the pressing rod 123 is connected to the side wall of the circular groove through the spring 124, and the rolling wheel 125 rolls on the coil.

[0035] See the instruction manual Figure 8The base 11 is provided with a wire outlet hole matched with the connecting wire, and a movable groove is provided at the wire outlet end of the wire outlet hole. A cleaning tube 25 is movably matched in the movable groove. Both ends of the cleaning tube 25 are connected to the end walls of the movable groove by springs to increase the flexibility of cleaning. Cleaning bristles 26 are obliquely provided on the inner wall of the cleaning tube 25, and the oblique direction is toward the wire outlet. The lower half of the cleaning tube 25 is provided with evenly distributed dust outlet holes. The base 11 is provided with a debris removal hole 27 directly below the cleaning tube 25. Since the cleaning bristles 26 are obliquely provided, the connecting wire passes through the cleaning bristles 26. When the tube 25 is pulled out, it is in the normal cleaning state along the direction of the cleaning brush 26. When winding the connecting line, one hand rotates the base 11 and the other hand adjusts the winding position of the connecting line. At this time, when the connecting line passes through the cleaning tube 25, it is against the cleaning brush 26. The cleaning state of the cleaning brush 26 is enhanced, and the debris adhered to the connecting line will be scraped off vigorously and finally discharged through the dust outlet and debris discharge holes 27. After the debris on the connecting line is scraped off, the increase in overall weight can be reduced, the manpower and time for cleaning the connecting line can be reduced, and the efficiency and quality of connecting line storage and sorting can be improved.

[0036] The mining ultrasonic bidirectional wind speed sensor provided in this embodiment has the following working process: When measuring the wind speed, after placing the main unit 1, hold the support frame 13 and then move it to the speed measuring point. During the movement, pull the connecting line outward, and the base 11 rotates as the connecting line goes out. During the pulling-out process, the function of the rolling wheel 125 is to always press against the outside of the connecting line under the action of the spring 124 and the pressure rod to prevent it from being scattered and entangled. After reaching the wind measuring point, place the two ultrasonic transducers 2 on the upwind and downwind sides respectively. At this time, the base 11 is fixed at the wind measuring point. The balancer 21 can be used to observe whether the position is horizontal, and the fixed position of the base 11 can be adjusted to make the entire device horizontal. Then, by adjusting the angle of the movable rod 18, the angle of the ultrasonic transducer 2 on the mounting base 19 can be achieved. During the adjustment, the movable rod 18 drives the X-axis angle adjustment member 15 to rotate left and right, and the Y-axis angle adjustment member 16 to rotate up and down. The angle indicator lines 20 on the two adjustment members are convenient for the operator to accurately control the viewing angle. After the adjustment is completed, the position of the movable rod 18 can be fixed by rotating the locking nut 24 at the upper end. After the host 1 is connected to the power supply, the wind speed in the lane can be detected, and the detection result can be read on the liquid crystal display 3. After the detection is completed, the operator holds the support frame 13 and manually rotates the base 11 while moving toward the host 1 to rotate the connecting line to the winding part 121 until it reaches the position of the host 1, ends the winding, and disconnects the external power supply to complete all operations.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The mining ultrasonic bidirectional wind speed sensor is characterized by: It comprises a host (1) and two ultrasonic transducers (2); The host (1) is used to analyze and display detection data, and connection ports (8) are provided on both sides of the host, and are respectively connected to the ultrasonic transducer (2) via connection lines; The two ultrasonic transducers (2) are used for wind speed detection. During detection, the two ultrasonic transducers (2) are arranged opposite to each other and tilted, and the angle between the line connecting the two ultrasonic transducers (2) and the wind direction is in the range of 30 to 60 degrees; A fixed bracket is provided between the two ultrasonic transducers (2) and the connecting wires, and is used for adjusting the tilt angle of the ultrasonic transducers (2). The fixed bracket comprises a base (11), on which a winding disk (12) is rotatably connected, and the connecting wires are neatly coiled on the winding disk (12). A support frame (13) is fixedly connected at the top center of the winding disk (12). A vertical rotating shaft (14) is rotatably mounted at the bottom of the support frame (13), and a semicircular X-axis angle adjusting member (15) and a Y-axis angle adjusting member (16) are rotatably connected inside the support frame (13). The vertical rotation shaft (14) is fixedly connected to the X-axis angle adjustment member (15); a universal connection member (17) movably mounted on the support frame (13) is provided on the inner side of the Y-axis angle adjustment member (16); a movable rod (18) is fixed on the universal connection member (17); the movable rod (18) passes through the Y-axis angle adjustment member (16) and the X-axis angle adjustment member (15) in sequence, and a locking nut (24) and a mounting clamp (19) are sequentially mounted on the passing end of the movable rod (18).

2. The mining ultrasonic bidirectional wind speed sensor according to claim 1 is characterized in that: The host (1) is a flameproof and intrinsically safe device, the outer shell of which is a rectangular shell with an opening at one end, and a cover plate (9) is fixed to the open side by screws, the cover plate (9) is provided with a window, and a dustproof glass (23) is arranged at the window, a circuit board (4) is fixed inside the host (1) by studs, an optical fiber module board (5), a power module board (6) and a network module board (7) are arranged on the circuit board, and a liquid crystal display (3) is installed by studs, and the liquid crystal display (3) is located at the window of the cover plate (9).

3. The mining ultrasonic bidirectional wind speed sensor according to claim 2 is characterized in that: A nameplate (22) is mounted on the cover plate (9) by means of screws, and a handle (10) is provided on the top of the housing of the main unit (1).

4. The mining ultrasonic bidirectional wind speed sensor according to claim 3 is characterized in that: The connection port (8) comprises a bell mouth (81), a rubber sleeve (82), a gasket (83), a clamping nut (84), and a washer (85); the bell mouth (81) is installed at the opening of the port; the rubber sleeve (82) is arranged on the inner ring of the bell mouth (81), and the inner ring is provided with threads; the bell mouth (81) is matched with the clamping nut (84) through the threads, and the gasket (85) is arranged on the clamping nut (84).

5. The mining ultrasonic bidirectional wind speed sensor according to claim 4 is characterized in that: When the two ultrasonic transducers (2) detect wind speed, one is located on the upwind side and the other is located on the downwind side.

6. The mining ultrasonic bidirectional wind speed sensor according to claim 5 is characterized in that: The movable rod (18) is slidably matched with the X-axis angle adjustment member (15) and the Y-axis angle adjustment member (16); a movable groove matching the movable rod (18) is provided in the middle of the X-axis angle adjustment member (15) and the Y-axis angle adjustment member (16); and an angle indication line (20) is engraved on one side of the movable groove.

7. The mining ultrasonic bidirectional wind speed sensor according to claim 6 is characterized in that: A balancer (21) is installed on the top of the support frame (13).

8. The mining ultrasonic bidirectional wind speed sensor according to claim 7 is characterized in that: The winding disk (12) comprises a winding portion (121), a mounting disk (122), and a pressing mechanism mounted on the mounting disk (122).

9. The mining ultrasonic bidirectional wind speed sensor according to claim 8, characterized in that: The pressing mechanism comprises a pressing rod (123), a spring (124), and a rolling wheel (125); a circular groove matching the pressing rod (123) is provided on the inner top of the mounting plate (122); one end of the pressing rod (123) is rotatably mounted on the inner top surface of the circular groove, and the other end is rotatably connected to the rolling wheel (125); the outer side of the pressing rod (123) is connected to the side wall of the circular groove via the spring (124), and the rolling wheel (125) rolls on the coil wire.

10. The mining ultrasonic bidirectional wind speed sensor according to claim 9, characterized in that: The base (11) is provided with a wire outlet hole for matching with the connecting wire, a movable groove is provided at the wire outlet end of the wire outlet hole, a cleaning tube (25) is movably matched in the movable groove, both ends of the cleaning tube (25) are connected to the end walls of the movable groove via a spring, cleaning bristles (26) are obliquely provided on the inner wall of the cleaning tube (25), and the oblique direction faces the wire outlet, the lower half of the cleaning tube (25) is provided with evenly distributed dust outlet holes, and the base (11) is provided with a debris removal hole (27) directly below the cleaning tube (25).

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