A turning device special for water pump shell

Abstract

The application discloses a kind of special turning device of water pump shell, belong to water pump turning technical field, including the main body mechanism for placing the water pump shell to be turned, the turning tool mechanism for being set on main body mechanism and the driving mechanism for driving turning tool mechanism lifting and rotating are used to water pump shell is turned;The application is switched by setting the four-station rotating mechanism of automatic, realizes the continuous feeding and processing of water pump shell, the cooperation design of quarter gear and lever mechanism, so that every two times is switched automatically after turning, significantly improves production efficiency;The turning tool mechanism of the application is linked with external air pump by inner suction pipe, outer suction pipe and external air pump, and metal chips are absorbed and removed in real time during turning process, to avoid the accumulation of waste to affect the processing quality or damage the tool;The center bearing, side bearing and ball structure provided by the application reduce the friction and vibration of moving parts, ensure the smooth operation of the equipment for a long time, and prolong the service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water pump turning, in particular to a special turning device for water pump housing. BACKGROUND

[0002] As a key component of fluid conveying system, the machining precision of water pump housing directly affects the sealing, durability and working efficiency of the water pump. The traditional turning machining of water pump housing usually adopts general lathe or numerical control lathe. However, due to the complex structure and large size of water pump housing, and the need for multiple machining processes, the traditional machining method has the following disadvantages: the traditional lathe can only process one workpiece at a time, and the workpiece needs to be manually replaced after processing, which leads to low production efficiency and is difficult to meet the batch production demand; the workpiece clamping, tool adjustment and waste cleaning rely on manual operation, which not only has high labor intensity, but also easily affects the machining precision due to human factors; the tool feeding and workpiece positioning precision of ordinary lathe are limited, which easily leads to unqualified machining surface roughness or size deviation, affecting the assembly performance of water pump housing; the metal chips generated during turning process are easily accumulated in the machining area, which may scratch the workpiece surface or interfere with the tool movement, reducing the machining quality. At present, some automatic turning equipment on the market adopts rotary workbench or multi-station design to improve efficiency, but still has the problems of complex station switching mechanism, insufficient transmission stability and easy positioning error, and lacks efficient waste collection system, affecting the reliability of continuous machining. Therefore, an automatic device specially used for turning water pump housing is needed, which can realize multi-station quick switching, high-precision tool control and real-time waste cleaning to improve the machining efficiency and quality. SUMMARY

[0003] In view of the above technical problems, the technical scheme adopted by the present application is as follows: a special turning device for water pump housing, comprising a main body mechanism for placing the water pump housing to be turned, the main body mechanism comprising a housing, a turning tool mechanism for turning the water pump housing and a driving mechanism for driving the turning tool mechanism to lift and rotate are arranged on the main body mechanism.

[0004] The driving mechanism comprises a work gear rotatingly installed on the housing, and a lifting frame slidingly installed on the housing.

[0005] The main body mechanism comprises a vertical shaft rotatingly installed in the housing, and a power gear, a top gear, a three-quarter gear and a quarter gear fixedly installed on the vertical shaft.

[0006] Further, the main body mechanism further comprises a switching turntable rotatingly installed on the housing, four placing supports for placing the water pump housing are fixedly installed on the switching turntable, and an upper gear and a lower gear are rotatingly installed in the housing through a gear shaft, and the upper gear is engaged with the quarter gear.

[0007] Further, the switching turntable is fixedly installed below the bottom groove disc, four push grooves are arranged on the bottom groove disc, a push rod is rotatably installed in the shell, a push rod gear is fixedly installed on the push rod, the push rod gear is engaged with the lower gear, a push rod column is fixedly installed on the push rod, and the push rod column enters the push groove to drive the bottom groove disc to rotate through the sliding of the push rod column and the push groove.

[0008] Further, the shell is slidably installed with a sealing plate, a plurality of sealing springs are arranged between the sealing plate and the shell, and the shell is sealed through the sealing plate.

[0009] When the water pump shell to be turned is placed on the placing support, the vertical shaft continuously rotates, the quarter gear is engaged with the upper gear, the three-quarter gear is not engaged with the butt joint gear, the quarter gear drives the upper gear and the lower gear to rotate, thereby driving the push rod gear and the push rod to rotate by 180 degrees, the push rod drives the push rod column to enter the push groove, the bottom groove disc and the switching turntable are driven to rotate by 90 degrees through the rotation of the push rod and the sliding of the push rod column and the push groove, then the push rod column leaves the push groove, thereby making the placing support rotate by 90 degrees, the water pump shell turned last is away from below the turning tool mechanism, and the water pump shell to be turned next reaches below the turning tool mechanism with the placing support, the quarter gear is engaged with the upper gear again, the push rod gear and the push rod rotate by 180 degrees again, at this time, the push rod column does not enter the push groove, the switching turnplate does not rotate, that is, the quarter gear is engaged with the upper gear twice, the bottom groove disc and the switching turnplate rotate by 90 degrees, and the turning tool mechanism has enough time to turn the water pump shell below twice.

[0010] Further, the driving mechanism further comprises a motor fixedly installed in the shell, a motor gear is fixedly installed on a motor shaft of the motor, the motor gear is externally wound with an output transmission belt, a bidirectional threaded column is rotatably installed in the shell, a bidirectional external thread is arranged on the bidirectional threaded column, two inner convex balls are fixedly installed on the lifting frame, the inner convex balls slide in the bidirectional external thread of the bidirectional threaded column, a butt joint gear is fixedly installed on the bidirectional threaded column, and the butt joint gear is engaged with the three-quarter gear.

[0011] Further, the shell is rotatably installed with a transmission gear and a pinion through a gear shaft, the pinion is engaged with the top gear, and the transmission gear and the working gear are externally wound with a top transmission belt.

[0012] The motor drives the motor gear to rotate, drives the power gear, the vertical shaft, the three-quarter gear, the top gear and the quarter gear to rotate through the output transmission belt, the top gear drives the pinion and the transmission gear to rotate, the operation gear is driven to rotate through the top transmission belt, when the three-quarter gear meshes with the butt joint gear, the quarter gear does not mesh with the upper gear, the butt joint gear and the bidirectional threaded column are driven to rotate by the three-quarter gear, the lifting frame is driven to ascend and descend along the outer shell by the inner convex ball sliding in the bidirectional external thread of the bidirectional threaded column, the lifting frame is driven to descend to the lowermost position once and return to the uppermost position once every time the three-quarter gear meshes with the butt joint gear.

[0013] Further, the turning tool mechanism comprises an inner rotating column fixedly installed below the operation gear, a lifting column slidingly installed outside the inner rotating column, four turning tools fixedly installed below the lifting column, a rotating disc fixedly installed on the lifting column, and a plurality of rolling balls rotatably installed on the rotating disc.

[0014] Further, a machining rack is fixedly installed on the lifting frame, the rotating disc rotates in the machining rack, the rolling balls roll along the grooves in the machining rack, a plurality of flexible sleeves are fixedly installed on the machining rack, side bearings are rotatably installed outside the flexible sleeves, a central bearing is rotatably installed outside the lifting column, and the central bearing is in contact with the side bearings.

[0015] Further, an inner sewage suction pipe is fixedly installed in the inner rotating column, a sewage suction head is fixedly installed below the inner sewage suction pipe, an outer sewage suction pipe is rotatably installed on the inner rotating column, the outer sewage suction pipe is fixedly installed with the outer shell, and the outer sewage suction pipe is connected with an external air pump.

[0016] The operation gear drives the inner rotating column to rotate, the inner rotating column drives the lifting column and the turning tools to rotate, the central bearing and the side bearings provide support for the inner rotating column and reduce the friction of the lifting column, a plurality of rolling balls further reduce the friction, the lifting frame drives the machining rack to ascend and descend, thereby driving the lifting column and the turning tools to ascend and descend, the lifting column slides up and down relative to the inner rotating column, the turning tools perform turning processing on the water pump shell below, during the processing, the external air pump removes the cutting residues and sundries through the outer sewage suction pipe, the inner sewage suction pipe and the sewage suction head, the lifting frame ascends and descends twice to switch the rotating disc to rotate by ninety degrees, that is, the turning tools perform turning processing on the water pump shell twice, the water pump shell leaves the turning tools below by switching the rotating disc, and the quality of the turning processing on the water pump shell is improved by twice turning.

[0017] Compared with the prior art, the present application has the following beneficial effects: (1) The present application sets up a four-station rotating mechanism that can automatically switch, realizes continuous feeding and processing of the water pump shell, and through the cooperation design of the quarter gear and the lever mechanism, the station is automatically switched after every two turning processes, reducing manual intervention and significantly improving production efficiency, which is suitable for batch processing; (2) The turning tool mechanism of the present application adopts a double-turning process, i.e. turning each workpiece twice, and combines with the gear transmission system to ensure the stable and controllable lifting and rotating movement of the tool, effectively reducing processing errors and improving the dimensional accuracy and surface finish of the water pump shell; (3) The turning tool mechanism of the present application is linked with the external air pump through the inner and outer suction pipes, which can adsorb and remove metal chips in real time during the turning process, avoiding the accumulation of waste chips to affect the processing quality or damage the tool, while reducing the frequency of manual cleaning and improving the reliability of continuous operation of the equipment; (4) The turning tool mechanism of the present application is provided with a center bearing, a side bearing and a ball structure, which reduces the friction and vibration of the moving parts, ensures the smooth operation of the equipment for a long time and prolongs the service life. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0019] Figure 2 It is a schematic diagram of the main body mechanism structure of the present application Figure One .

[0020] Figure 3 It is a schematic diagram of the main body mechanism structure of the present application Figure Two .

[0021] Figure 4 It is a schematic diagram of the main body mechanism structure of the present application Figure Three .

[0022] Figure 5 It is a schematic diagram of the driving mechanism structure of the present application Figure One .

[0023] Figure 6 It is a schematic diagram of the driving mechanism structure of the present application Figure Two .

[0024] Figure Seven It is a schematic diagram of the driving mechanism structure of the present application Figure Three .

[0025] Figure Eight It is a schematic diagram of the turning tool mechanism structure of the present application Figure One .

[0026] Figure Nine It is a schematic diagram of the turning tool mechanism structure of the present application Figure Two .

[0027] Figure Ten It is a schematic diagram of the turning tool mechanism structure of the present applicationFigure Three .

[0028] Figure Eleven Fig. 1 is a structural schematic diagram of the turning tool mechanism of the present application Figure Four .

[0029] Fig. 1 is a structural schematic diagram of the turning tool mechanism of the present application Specific embodiments

[0030] The specific embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0031] Embodiment: Referring to Figures 1-11 , a turning device special for water pump shell, comprising a main mechanism for placing the water pump shell to be turned, the main mechanism comprising a shell 101, the main mechanism being provided with a turning tool mechanism for turning the water pump shell and a driving mechanism for driving the turning tool mechanism to lift and rotate;

[0032] The driving mechanism comprises a working gear 208 rotatably installed on the shell 101, and the shell 101 is slidably provided with a lifting frame 210;

[0033] The main mechanism comprises a vertical shaft 110 rotatably installed in the shell 101, and the vertical shaft 110 is fixedly provided with a power gear 113, a top gear 114, a three-quarter gear 112 and a one-quarter gear 111.

[0034] As shown in Figures 2-4 , the main mechanism further comprises a switching turntable 102 rotatably installed on the shell 101, the switching turntable 102 is fixedly provided with four placing holders 103 for placing the water pump shell, and the shell 101 is rotatably provided with an upper gear 108 and a lower gear 109 through a gear shaft, and the upper gear 108 is engaged with the one-quarter gear 111.

[0035] AsFigures 2-4 As shown, a bottom groove plate 106 is fixedly installed below the switching turntable 102. The bottom groove plate 106 is provided with four actuation slots 117. A lever 115 is rotatably installed inside the outer casing 101. A lever gear 107 is fixedly installed on the lever 115. The lever gear 107 meshes with the lower gear 109. A lever post 116 is fixedly installed on the lever 115. When the lever post 116 enters the actuation slot 117, the bottom groove plate 106 is rotated by the sliding of the lever post 116 and the actuation slot 117.

[0036] like Figures 2-4 As shown, a sealing plate 104 is slidably mounted on the outer shell 101, and a plurality of sealing springs 105 are provided between the sealing plate 104 and the outer shell 101 to seal the interior of the outer shell 101.

[0037] In use, the water pump housing to be machined is placed on the placement tray 103. The vertical shaft 110 rotates continuously. When the quarter gear 111 meshes with the upper gear 108, the three-quarter gear 112 does not mesh with the mating gear 205. The quarter gear 111 drives the upper gear 108 and the lower gear 109 to rotate, thereby driving the lever gear 107 and the lever 115 to rotate 180 degrees. The lever 115 drives the lever post 116 into the actuation groove 117. As the lever 115 rotates, combined with the sliding of the lever post 116 and the actuation groove 117, the bottom groove plate 106 and the switching turntable 102 rotate 90 degrees. Then, the lever post 116 leaves the actuation groove 117. This causes the placement tray 103 to rotate 90 degrees, moving the previously machined water pump housing away from below the cutting tool mechanism. The next water pump housing to be machined then moves to below the cutting tool mechanism along with the placement tray 103. When the quarter gear 111 meshes with the upper gear 108 again, the lever gear 107 and lever 115 rotate 180 degrees again. At this time, the lever post 116 will not enter the shifting groove 117, and the switching turntable 102 will not rotate. That is, the quarter gear 111 meshes with the upper gear 108 twice, and the bottom groove plate 106 and the switching turntable 102 rotate 90 degrees, giving the cutting tool mechanism enough time to perform two machining operations on the water pump housing below it.

[0038] like Figures 5-7 As shown, the drive mechanism also includes a motor 201 fixedly installed inside the housing 101. A motor gear 202 is fixedly installed on the motor shaft of the motor 201. An output transmission belt 203 is wound around the motor gear 202 and the power gear 113. A bidirectional threaded column 204 is rotatably installed inside the housing 101. The bidirectional threaded column 204 is provided with bidirectional external threads. Two internally protruding balls 211 are fixedly installed on the lifting frame 210. The internally protruding balls 211 slide in the bidirectional external threads of the bidirectional threaded column 204. A mating gear 205 is fixedly installed on the bidirectional threaded column 204. The mating gear 205 meshes with the three-quarter gear 112.

[0039] As Figures 5-7 shown, the transmission gear 207 and pinion 206 are rotatably mounted on the housing 101 by the gear shaft, the pinion 206 is engaged with the top gear 114, and the transmission gear 207 and working gear 208 are wrapped with the top transmission belt 209.

[0040] The motor 201 drives the motor gear 202 to rotate, drives the power gear 113, vertical shaft 110, three-quarter gear 112, top gear 114 and quarter gear 111 to rotate through the output transmission belt 203, the top gear 114 drives the pinion 206 and transmission gear 207 to rotate, and the working gear 208 is driven to rotate through the top transmission belt 209. When the three-quarter gear 112 is engaged with the docking gear 205, the quarter gear 111 is not engaged with the upper gear 108, the three-quarter gear 112 drives the docking gear 205 and bidirectional threaded column 204 to rotate, the lifting frame 210 is driven to ascend and descend along the housing 101 by the inner convex ball 211 sliding in the bidirectional external thread of the bidirectional threaded column 204, and the lifting frame 210 is driven to descend to the lowest position and then return to the highest position once every time the three-quarter gear 112 is engaged with the docking gear 205.

[0041] As Figures 8-11 shown, the tool mechanism includes an inner rotating column 309 fixedly installed below the working gear 208, a lifting column 307 slidingly installed outside the inner rotating column 309, four tools 308 fixedly installed below the lifting column 307, a rotating disc 305 fixedly installed on the lifting column 307, and a plurality of rolling balls 306 rotatably installed on the rotating disc 305.

[0042] As Figures 8-11 shown, a machining frame 301 is fixedly installed on the lifting frame 210, the rotating disc 305 rotates in the machining frame 301, the rolling balls 306 roll along the grooves in the machining frame 301, a plurality of flexible sleeves 303 are fixedly installed on the machining frame 301, side bearings 304 are rotatably installed outside the flexible sleeves 303, a central bearing 302 is rotatably installed outside the lifting column 307, and the central bearing 302 is in contact with the side bearings 304.

[0043] As Figures 8-11 shown, an inner sewage suction pipe 311 is fixedly installed in the inner rotating column 309, a sewage suction head 310 is fixedly installed below the inner sewage suction pipe 311, an outer sewage suction pipe 312 is rotatably installed on the inner rotating column 309, the outer sewage suction pipe 312 is fixedly installed with the housing 101, and the outer sewage suction pipe 312 is connected with an external air pump.

[0044] The work gear 208 rotates the inner rotating column 309, the inner rotating column 309 rotates the lifting column 307 and the lathe tool 308, the center bearing 302 and the side bearing 304 provide support to the inner rotating column 309 and reduce the friction of the lifting column 307, the plurality of rolling balls 306 further reduce the friction, the lifting frame 210 lifts the processing frame 301, thereby lifting the lifting column 307 and the lathe tool 308, the lifting column 307 slides up and down relative to the inner rotating column 309, and the lathe tool 308 performs turning processing on the water pump shell below, during processing, the external air pump removes the cutting residues and sundries through the external suction pipe 312, the inner suction pipe 311 and the suction head 310, the lifting frame 210 lifts twice to switch the rotating disc 102 to rotate ninety degrees, that is, the lathe tool 308 performs turning twice on the water pump shell, and the water pump shell leaves the lathe tool 308 below along with the switching rotating disc 102, and the quality of the turning processing of the water pump shell is improved through twice turning.

[0045] The working principle of the turning device special for water pump housings disclosed by the application is as follows: when in use, the water pump housing to be turned is placed on the placing support 103, the motor 201 drives the motor gear 202 to rotate, the output transmission belt 203 drives the power gear 113, the vertical shaft 110, the three-quarter gear 112, the top gear 114 and the quarter gear 111 to rotate, the top gear 114 drives the pinion 206 and the transmission gear 207 to rotate, the top transmission belt 209 drives the working gear 208 to rotate, the vertical shaft 110 continuously rotates, when the quarter gear 111 meshes with the upper gear 108, the three-quarter gear 112 does not mesh with the butt joint gear 205, the quarter gear 111 drives the upper gear 108 and the lower gear 109 to rotate, thereby driving the lever gear 107 and the lever 115 to rotate by 180 degrees, the lever 115 drives the lever column 116 to enter the lever slot 117, with the rotation of the lever 115, the lever column 116 slides in the lever slot 117, the bottom groove disc 106 and the switching turntable 102 are driven to rotate by 90 degrees, then the lever column 116 leaves the lever slot 117, thereby making the placing support 103 rotate by 90 degrees, the water pump housing on which the previous turning process is completed is away from below the turning tool mechanism, and the next water pump housing to be turned reaches below the turning tool mechanism along with the placing support 103, when the quarter gear 111 meshes with the upper gear 108 again, the lever gear 107 and the lever 115 rotate by 180 degrees again, at this time, the lever column 116 does not enter the lever slot 117, the switching turntable 102 does not rotate, that is, the quarter gear 111 meshes with the upper gear 108 twice, the bottom groove disc 106 and the switching turntable 102 rotate by 90 degrees, so that the turning tool mechanism has enough time to perform twice turning processes on the water pump housing below it. When the three-quarter gear 112 meshes with the butt joint gear 205, the quarter gear 111 does not mesh with the upper gear 108, the three-quarter gear 112 drives the butt joint gear 205 and the bidirectional threaded column 204 to rotate, the inner convex ball 211 slides in the bidirectional external thread of the bidirectional threaded column 204, thereby driving the lifting frame 210 to ascend and descend along the housing 101, the three-quarter gear 112 drives the lifting frame 210 to descend to the lowermost position and then return to the uppermost position once every time the three-quarter gear 112 meshes with the butt joint gear 205.The work gear 208 rotates to drive the inner rotating column 309 to rotate, the inner rotating column 309 drives the lifting column 307 and the lathe tool 308 to rotate, the center bearing 302 and the side bearing 304 provide support to the inner rotating column 309 and reduce the friction of the lifting column 307, a plurality of rolling balls 306 further reduce the friction, the lifting frame 210 drives the machining frame 301 to lift, thereby driving the lifting column 307 and the lathe tool 308 to lift, the lifting column 307 slides up and down relative to the inner rotating column 309, and the lathe tool 308 is used for turning the water pump shell below, when machining, the external air pump draws away the cutting residues and sundries through the external suction pipe 312, the inner suction pipe 311 and the suction head 310, the lifting frame 210 lifts twice to switch the rotating disc 102 to rotate by 90 degrees, that is, the lathe tool 308 turns the water pump shell twice, and after the water pump shell leaves below the lathe tool 308, the quality of the turning machining of the water pump shell is improved.

[0046] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art, according to the technical solution and the inventive concept of the present application, makes equivalent replacement or change within the technical scope of the present application, which should be covered within the protection scope of the present application.

Claims

1. A turning device for water pump housing, comprising a main body mechanism for placing a water pump housing to be turned, characterized by: The main body mechanism comprises a shell (101), a turning tool mechanism for turning the water pump shell is arranged on the shell (101), and a driving mechanism for driving the turning tool mechanism to lift and rotate is arranged on the shell (101); The driving mechanism comprises a working gear (208) rotatably arranged on the shell (101), and a lifting frame (210) is slidably arranged on the shell (101); The main body mechanism comprises a vertical shaft (110) rotatably arranged in the shell (101), and a power gear (113), a top gear (114), a three-quarter gear (112) and a quarter gear (111) are fixedly arranged on the vertical shaft (110); The main body mechanism further comprises a switching turntable (102) rotatably arranged on the shell (101), four placing holders (103) for placing the water pump shell are fixedly arranged on the switching turntable (102), an upper gear (108) and a lower gear (109) are rotatably arranged in the shell (101) through a gear shaft, and the upper gear (108) is engaged with the quarter gear (111); A bottom groove disc (106) is fixedly arranged below the switching turntable (102), four pushing grooves (117) are arranged on the bottom groove disc (106), a pushing rod (115) is rotatably arranged in the shell (101), a pushing rod gear (107) is fixedly arranged on the pushing rod (115), the pushing rod gear (107) is engaged with the lower gear (109), a pushing rod column (116) is fixedly arranged on the pushing rod (115), and the bottom groove disc (106) is driven to rotate through the sliding of the pushing rod column (116) and the pushing groove (117) after the pushing rod column (116) enters the pushing groove (117); The driving mechanism further comprises a motor (201) fixedly arranged in the shell (101), a motor gear (202) is fixedly arranged on a motor shaft of the motor (201), an output transmission belt (203) is wound outside the power gear (113) and the motor gear (202), a bidirectional screw column (204) is rotatably arranged in the shell (101), a bidirectional external thread is arranged on the bidirectional screw column (204), two internal convex balls (211) are fixedly arranged on the lifting frame (210), the internal convex balls (211) slide in the bidirectional external thread of the bidirectional screw column (204), a butt gear (205) is fixedly arranged on the bidirectional screw column (204), and the butt gear (205) is engaged with the three-quarter gear (112); The turning tool mechanism comprises an inner rotating column (309) fixedly arranged below the working gear (208), a lifting column (307) is slidably arranged outside the inner rotating column (309), four turning tools (308) are fixedly arranged below the lifting column (307), a turntable (305) is fixedly arranged on the lifting column (307), and a plurality of rolling balls (306) are rotatably arranged on the turntable (305).

2. A turning device for water pump housings according to claim 1, characterized in that: A closing plate (104) is slidably arranged on the shell (101), a plurality of closing springs (105) are arranged between the closing plate (104) and the shell (101), and the shell (101) is sealed through the closing plate (104).

3. A turning device for water pump housings according to claim 1, characterized in that: The transmission gear (207) and the pinion (206) are rotatably installed on the shell (101) through a gear shaft, the pinion (206) is engaged with the top gear (114), and the transmission gear (207) and the operation gear (208) are externally wound with a top transmission belt (209).

4. A turning device for water pump housings according to claim 1, characterized in that: The processing frame (301) is fixedly installed on the lifting frame (210), the rotating disc (305) rotates in the processing frame (301), the rolling ball (306) rolls along the groove in the processing frame (301), a plurality of flexible sleeves (303) are fixedly installed on the processing frame (301), the side bearing (304) is rotatably installed outside the flexible sleeve (303), the center bearing (302) is rotatably installed outside the lifting column (307), and the center bearing (302) is in contact with the side bearing (304).

5. A turning device for water pump housings according to claim 4, characterized in that: The inner suction pipe (311) is fixedly installed in the inner rotating column (309), the suction head (310) is fixedly installed below the inner suction pipe (311), the outer suction pipe (312) is rotatably installed on the inner rotating column (309), the outer suction pipe (312) is fixedly installed on the shell (101), and the outer suction pipe (312) is connected with an external air pump.

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