A drip irrigation tape punching device

Abstract

The present application relates to a drip irrigation tape punching device, mainly relating to the technical field of drip irrigation tape production equipment, which comprises a frame, a pay-off reel arranged at one end of the frame, a plurality of guiding mechanisms arranged on the frame, a plurality of drilling mechanisms arranged on the frame, a plurality of supporting mechanisms arranged on the frame, and a take-up reel arranged at the other end of the frame; the plurality of guiding mechanisms are evenly distributed along the length direction of the frame, the plurality of drilling mechanisms are evenly distributed along the length direction of the frame and are arranged alternately with the guiding mechanisms; the supporting mechanism comprises a base vertically arranged on the frame, two limiting frames vertically arranged at both ends of the base, and a supporting component arranged inside the drip irrigation tape. The present application has the advantages of accurate punching positioning, not easy to generate layer penetration, and not easy to leave residues inside the drip irrigation tape.

Description

Technical Field

[0001] This application relates to the technical field of drip irrigation tape production equipment, and in particular to a drip irrigation tape punching device. Background Art

[0002] A drip irrigation tape is a device used for water-saving irrigation, usually made of soft polymer materials such as polyethylene, polypropylene, polyurethane, reverse osmosis polyamide, etc. It has a series of tiny holes or nozzles through which water droplets are dripped into the soil around the roots of plants, thus achieving precise irrigation of plants. Compared with traditional sprinkler irrigation, drip irrigation tape can more effectively utilize water resources, reduce water waste and soil erosion, and improve crop yield and quality.

[0003] The holes or nozzles on the drip irrigation tape directly affect the dripping speed and uniformity of water droplets. Therefore, it is necessary to precisely control the aperture size and position during the production process to ensure that each hole can achieve a certain flow rate and spraying range. When the existing punching equipment punches the drip irrigation tape with inlaid patches, it is easy for the hole position to deviate from the patch position due to inaccurate positioning of the drip irrigation tape, resulting in low coincidence. In addition, the inner wall of the drip irrigation tape is easily limited by the positioning structure of the punching equipment and adheres, resulting in the punching equipment penetrating both sides of the drip irrigation tape at the same time. These phenomena will have an adverse impact on the final product quality of the drip irrigation tape.

[0004] Regarding the above related technologies, the inventor believes that during the existing punching process of drip irrigation tapes, misalignment and layer penetration are likely to occur, and there are certain defects in the finished product quality of drip irrigation tapes. Summary of the Invention

[0005] In order to improve the production quality of drip irrigation tapes and avoid or reduce misalignment and layer penetration phenomena occurring in the perforation link during the production of drip irrigation tapes, this application provides a drip irrigation tape punching device.

[0006] A drip irrigation tape punching device provided by this application adopts the following technical solutions:

[0007] A drip irrigation tape punching device includes a frame, a pay-off reel provided at one end of the frame, a plurality of guiding mechanisms provided on the frame, a plurality of drilling mechanisms provided on the frame, a plurality of supporting mechanisms provided on the frame, and a take-up reel provided at the other end of the frame; the plurality of guiding mechanisms are evenly distributed along the length direction of the frame, the plurality of drilling mechanisms are evenly distributed along the length direction of the frame and are alternately arranged with the guiding mechanisms; the supporting mechanism includes a base vertically provided on the frame, two limiting frames vertically provided at both ends of the base, and a supporting component provided inside the drip irrigation tape.

[0008] By adopting the above technical scheme, the frame plays a role in adjusting the installation position and supporting and limiting the other parts of the structure of the present application. The unwinding shaft and the winding shaft can respectively unwind and wind up the drip irrigation tape. The guide mechanism plays a guiding and limiting role on the drip irrigation tape, which can avoid the dislocation of the drip irrigation tape during movement and improve the drilling accuracy. The drilling mechanism can drill holes in the drip irrigation tape, and the supporting mechanism plays a limiting role on the drip irrigation tape. While improving the drilling accuracy, it plays a supporting role on the inner wall of the drip irrigation tape, which can effectively avoid the penetration phenomenon caused by adhesion of the inner wall of the drip irrigation tape, thereby achieving the purpose of the invention of improving the production quality of the drip irrigation tape and avoiding or reducing the dislocation and penetration phenomenon in the perforation link of the drip irrigation tape production.

[0009] Optionally, the support assembly includes a shell, an adjusting rod passing through the shell along the length direction, a fastening nut sleeved on one end of the adjusting rod and abutting against the outer wall of the shell, a plurality of support rods passing through the shell perpendicular to the length direction, and a top plate arranged on the support rods; the adjusting rod is rotatably connected to the shell, the fastening nut is threadably matched with the shell, and the adjusting rod is meshed with the plurality of support rods.

[0010] By adopting the above technical solution, the shell in the support assembly provides support and limitation for the installation of the adjusting rod and the support rod. The meshing structure design between the adjusting rod and the support rod is used to adjust the spacing of the top plate, so as to adapt to drip irrigation belts of different sizes and apertures, thereby increasing the scope of application of the present application. The top plate supports the inner wall of the drip irrigation belt, avoids adhesion of the inner wall of the drip irrigation belt, and improves the processing quality of the drip irrigation belt perforation.

[0011] Optionally, the limiting frame includes a gate-shaped beam vertically arranged on the base and an adjusting roller arranged on the gate-shaped beam, and the adjusting roller is slidably connected to the gate-shaped beam along the height direction of the gate-shaped beam.

[0012] By adopting the above technical solution, the slit formed by the gate beam and the adjusting roller plays a role in supporting and limiting the support assembly, which can prevent the support assembly from moving with the drip irrigation belt. The structural design of the sliding connection between the adjusting roller and the gate beam along the height direction of the gate beam allows the width of the slit between the adjusting roller and the gate beam to be adaptively adjusted according to the thickness of the drip irrigation belt, reducing friction resistance while forming a good limiting effect on the support assembly.

[0013] Optionally, the drilling mechanism includes a motor adjustment seat arranged on the frame, a servo motor arranged at one end of the motor adjustment seat, and a drill bit drivingly connected to the power output shaft of the servo motor.

[0014] By adopting the above technical solution, the motor adjusting seat in the drilling mechanism plays a supporting role in the installation of the servo motor and the height adjustment in the vertical direction. The servo motor can drive the drill bit to rotate so as to perform drilling operations on the drip irrigation tape.

[0015] Optionally, an air-cooling pipe is provided on the motor adjusting seat, and the air-cooling pipe is rotatably connected to the motor adjusting seat.

[0016] By adopting the above technical solution, the air-cooling pipe on the motor adjusting seat can help dissipate heat and cool down the drilling position of the drip irrigation tape in an air-cooling manner, accelerate the cooling and forming of the drilling position of the drip irrigation tape, and improve the drilling forming quality.

[0017] Optionally, the guiding mechanism includes a rotating shaft vertically penetrating through the frame and a guiding roller sleeved on the rotating shaft.

[0018] By adopting the above technical solution, the rotating shaft penetrating through the frame can drive the guiding roller sleeved on the rotating shaft to rotate, thus playing a supporting role for the drip irrigation tape. The structural design of the sliding connection between the rotating shaft and the frame in the direction perpendicular to the ground can be used to adaptively adjust the position of the guiding roller.

[0019] Optionally, a plurality of heating coils are fixedly arranged between the rotating shaft and the guiding roller, and the plurality of heating coils are uniformly arranged along the circumferential direction of the rotating shaft.

[0020] By adopting the above technical solution, the heating coil structure arranged between the guiding roller and the rotating shaft can increase the surface temperature of the guiding roller, thereby increasing the temperature of the drip irrigation tape, softening the surface layer, and facilitating support and drilling.

[0021] Optionally, adjusting angle steels are provided at both ends of the frame. The adjusting angle steels are slidably connected to the frame in the direction perpendicular to the ground. Two vertical rollers are arranged on the adjusting angle steels in the direction perpendicular to the ground, and the roller shafts of the vertical rollers are slidably connected to the adjusting angle steels along the direction perpendicular to the frame.

[0022] By adopting the above technical solution, the adjusting angle steels arranged at both ends of the frame provide support for the vertical rollers, and the two vertical rollers play a limiting role in the movement of the drip irrigation tape, preventing it from moving out of position and reducing the possibility of drilling deviation.

[0023] Optionally, an oil box is provided on one side of the pay-off reel. An oil pipe penetrates through the oil box, and the oil pipe is communicated with the oil box and is slidably connected in the direction perpendicular to the ground.

[0024] By adopting the above technical solution, the oil box arranged on one side of the unwinding reel is used to hold lubricating oil. The oil pipe can guide the lubricating oil in the oil box to the surface of the drip irrigation tape. The structural design of the sliding connection between the oil pipe and the oil box enables the ground clearance of the end of the oil pipe in contact with the drip irrigation tape to be adaptively adjusted according to the actual size and processing requirements of the drip irrigation tape.

[0025] Optionally, a bending portion is provided at one end of the oil pipe away from the oil box, and a sponge sleeve is sleeved on the bending portion.

[0026] By adopting the above technical solution, the bending portion provided at one end of the oil pipe away from the oil box, that is, the end of the oil pipe in contact with the drip irrigation tape, plays a role in supporting and limiting the drip irrigation tape. The sponge sleeve sleeved on the bending portion can reduce the contact friction between the drip irrigation tape and the oil pipe, making the application of the lubricating oil more uniform.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The frame in the present application plays a role in adjusting the installation position and supporting and limiting other parts of the present application. The unwinding reel and the winding reel can respectively unwind and wind the drip irrigation tape. The guiding mechanism plays a role in guiding and limiting the drip irrigation tape, which can prevent the drip irrigation tape from being misaligned during movement, improve the drilling accuracy. The drilling mechanism can drill the drip irrigation tape, and the supporting mechanism plays a role in limiting the drip irrigation tape. While improving the drilling accuracy, it plays a supporting role in the inner wall of the drip irrigation tape, which can effectively prevent the through-layer phenomenon caused by the adhesion of the inner wall of the drip irrigation tape, achieving the invention purpose of improving the production quality of the drip irrigation tape and avoiding or reducing the misalignment and through-layer phenomena in the perforation link of the drip irrigation tape production;

[0029] 2. The housing in the support assembly in the present application provides support and limitation for the installation of the adjusting rod and the support rod. The structural design of the meshing between the adjusting rod and the support rod is used to adjust the distance between the top plates, so as to adapt to drip irrigation tapes of different sizes and different pore diameters, increasing the applicable range of the present application. The top plate plays a supporting role in the inner wall of the drip irrigation tape, preventing the inner wall of the drip irrigation tape from adhering, and improving the processing quality of the perforation of the drip irrigation tape;

[0030] 3. The oil box arranged on one side of the unwinding reel in the present application is used to hold lubricating oil. The oil pipe can guide the lubricating oil in the oil box to the surface of the drip irrigation tape. The structural design of the sliding connection between the oil pipe and the oil box enables the ground clearance of the end of the oil pipe in contact with the drip irrigation tape to be adaptively adjusted according to the actual size and processing requirements of the drip irrigation tape. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of a drip irrigation tape punching device disclosed in an embodiment of the present application.

[0032] Figure 2 It is a schematic structural diagram of the guiding mechanism in the embodiment of the present application.

[0033] Figure 3 It is a schematic structural diagram of the drilling mechanism in the embodiment of the present application.

[0034] Figure 4 It is a schematic structural diagram of the supporting mechanism in the embodiment of the present application.

[0035] Figure 5 It is a schematic structural diagram of the supporting component in the embodiment of the present application.

[0036] Explanation of reference numerals: 1, frame; 11, adjusting angle steel; 12, vertical roller; 2, pay-off reel; 21, oil box; 22, oil pipe; 23, bending part; 231, sponge sleeve; 3, guiding mechanism; 31, rotating shaft; 32, guiding roller; 33, heating coil; 4, drilling mechanism; 41, motor adjusting seat; 42, servo motor; 43, drill bit; 44, air-cooling pipe; 5, supporting mechanism; 51, base; 52, limiting frame; 53, supporting component; 521, gantry beam; 522, adjusting roller; 531, housing; 532, adjusting rod; 533, fastening nut; 534, supporting rod; 535, top plate; 6, take-up reel. Detailed implementation manners

[0037] The following will Figure 1 - attach Figure 5 make a further detailed description of the present application.

[0038] A drip irrigation tape is a device for water-saving irrigation. It has a series of tiny holes or nozzles through which water droplets are dripped into the soil around the roots of plants, thereby achieving precise irrigation of plants. The holes or nozzles on the drip irrigation tape directly affect the dripping speed and uniformity of water droplets. Therefore, it is necessary to precisely control the aperture size and position during the production process to ensure that each hole can achieve a certain flow rate and spraying range. When the existing punching equipment punches the drip irrigation tape with inlaid patches, it is easy to cause the hole position to deviate from the patch position due to inaccurate positioning of the drip irrigation tape, and the coincidence degree is not high. In addition, the inner wall of the drip irrigation tape is easily limited by the positioning structure of the punching equipment and adhered, and then the punching equipment penetrates both sides of the drip irrigation tape at the same time. These phenomena will have an adverse impact on the final product quality of the drip irrigation tape. In order to improve the production quality of the drip irrigation tape and avoid or reduce the misalignment and layer penetration phenomena that occur in the perforation link of the drip irrigation tape production, the present application provides a drip irrigation tape punching device.

[0039] The embodiment of the present application discloses a drip irrigation tape punching device. Refer to Figure 1, the drip irrigation tape punching device includes a frame 1, a reel 2, a guiding mechanism 3, a drilling mechanism 4, a supporting mechanism 5 and a take-up shaft 6. Among them, the frame 1 is fixedly installed on the ground or a pedestal, the reel 2 and the take-up shaft 6 are respectively installed at both ends of the frame 1, and multiple guiding mechanisms 3, drilling mechanisms 4 and supporting mechanisms 5 are provided. The multiple guiding mechanisms 3 and drilling mechanisms 4 are evenly distributed along the length direction of the frame 1, and the guiding mechanisms 3 and drilling mechanisms 4 are arranged alternately. The supporting mechanism 5 is installed on the frame 1 and corresponds to the upper and lower positions of the drilling mechanism 4.

[0040] Refer to Figure 1 , the frame 1 can be a metal plate provided with multiple bolt holes and waist-shaped holes. Two adjusting angle steels 11 are installed at both ends of the frame 1. The part of the adjusting angle steel 11 that fits with the frame 1 is provided with a waist-shaped hole, and a bolt is passed through the waist-shaped hole of the adjusting angle steel 11 and through the frame 1. Two vertical rollers 12 are vertically installed on the plane of the adjusting angle steel 11 perpendicular to the frame 1. The roller shafts of the two vertical rollers 12 are rotatably connected to the adjusting angle steel 11 and are slidably connected along the direction perpendicular to the plane where the frame 1 is located. The distance and installation height between the two vertical rollers 12 can be adaptively adjusted according to the specific size and processing requirements of the drip irrigation tape.

[0041] Refer to Figure 1 , the reel 2 can be a roller shaft for unreeling the unprocessed drip irrigation tape. The reel 2 is vertically installed on the frame 1. An oil box 21 is installed on one side of the reel 2. The oil box 21 can be a rectangular hollow metal box with a lid on the top. An oil pipe 22 is passed through the oil box 21. One end of the oil pipe 22 is slidably connected to the oil box 21 along the direction perpendicular to the ground and is communicated with the inside of the oil box 21. The other end of the oil pipe 22 is provided with a bent portion 23, and the bent portion 23 plays a role in supporting and limiting the drip irrigation tape unreeled from the reel 2. Multiple penetration holes are provided on the bent portion 23. A sponge sleeve 231 is sleeved on the bent portion 23, and the sponge sleeve 231 can reduce the contact friction force and evenly apply the lubricating oil on the surface of the drip irrigation tape, thereby reducing the contact friction force between the drip irrigation tape and the guiding mechanism 3 and the supporting mechanism 5.

[0042] Refer to Figure 1 and Figure 2The guide mechanism 3 includes a rotating shaft 31, a guide roller 32 and a heating coil 33. The rotating shaft 31 is passed through the frame 1 in a direction perpendicular to the plane where the frame 1 is located, and a waist-shaped hole is opened in a direction perpendicular to the ground at the position where the rotating shaft 31 is installed on the frame 1. The rotating shaft 31 is slidably connected to the frame 1 in a direction perpendicular to the ground. The guide roller 32 sleeved on the rotating shaft 31 is rotatably connected to the rotating shaft 31. A plurality of heating coils 33 are installed at the slit position between the guide roller 32 and the rotating shaft 31, and the plurality of heating coils 33 are evenly distributed along the circumference of the rotating shaft 31. The heating coil 33 can increase the surface temperature of the guide roller 32, thereby heating the drip irrigation tape to be processed.

[0043] Reference Figure 1 and Figure 3 , the drilling mechanism 4 includes a motor adjustment seat 41, a servo motor 42, a drill bit 43 and an air cooling pipe 44. Among them, the motor adjustment seat 41 is fixedly mounted on the top of the frame 1. The servo motor 42 and the air cooling pipe 44 are both mounted on the motor adjustment seat 41. The motor adjustment seat 41 has a screw lifting structure for adjusting the height of the servo motor 42 in the vertical direction. The vertical height of the servo motor 42 can be adjusted by rotating the hand wheel on the screw. The power output shaft of the servo motor 42 is connected to the drill bit 43 through a transmission rod and a worm gear structure. The drill bit 43 can rotate under the drive of the servo motor 42 to achieve drilling operations. The air cooling pipe 44 is a section of a polymer pipe. A turbo fan is installed in the air cooling pipe 44, and the turbo fan can rotate to generate airflow under the drive of the power output shaft of the servo motor 42. The pipeline can guide the airflow to the drilling position, reduce the temperature of the drilling position, and improve the quality of drilling and forming. The air cooling pipe 44 is rotatably connected to the motor adjustment seat 41.

[0044] Reference Figure 1 and Figure 4 The support mechanism 5 includes a base 51, a limit frame 52 and a support assembly 53. Among them, the base 51 can be a rectangular metal support plate vertically installed on the frame 1. The installation position of the base 51 corresponds to the installation position of the drilling mechanism 4 one by one. The limit frames 52 are installed at both ends of the base 51. The limit frame 52 includes a gate beam 521 and an adjusting roller 522. The gate beam 521 is vertically fixed on the base 51 by welding, and the roller shaft of the adjusting roller 522 is slidably connected with the gate beam 521 along the height direction of the gate beam 521. The slit width between the adjusting roller 522 and the cross bar of the gate beam 521 can be adaptively adjusted according to the wall thickness of the drip irrigation tape and processing requirements.

[0045] refer to Figure 4 and Figure 5, each support mechanism 5 includes a support component 53. The support component 53 is arranged inside the drip irrigation tape and is placed inside the drip irrigation tape before processing the drip irrigation tape. The support component 53 includes a housing 531, an adjusting rod 532, a fastening nut 533, a support rod 534 and a top plate 535. Among them, the housing 531 can be a long strip-shaped hollow metal shell provided with a plurality of rectangular through holes. The adjusting rod 532 is inserted into the housing 531 along the length direction of the housing 531 and is rotatably connected to the housing 531. One end of the adjusting rod 532 is provided with a flat head for convenient rotation, and the other end of the adjusting rod 532 is processed with a threaded section. The fastening nut 533 is sleeved on one end of the adjusting rod 532 provided with the threaded section. After the fastening nut 533 is tightened, it abuts against the outer surface of the housing 531. The top plates 535 are symmetrically arranged on both sides of the housing 531. The top plate 535 can be an arc-shaped metal plate provided with tapered transition sections at both ends. Two support rods 534 are vertically connected to the concave surface of the top plate 535. The support rods 534 can be a section of solid rack. The support rods 534 are inserted into the housing 531 along the direction perpendicular to the length of the housing 531 and are meshed with the adjusting rod 532. The rotation of the adjusting rod 532 can drive the support rods 534 to extend or shorten. Therefore, the distance between the top plates 535 can be changed by rotating the adjusting rod 532 to adapt to drip irrigation tapes with different apertures.

[0046] Referring to Figure 1 , the take-up shaft 6 is installed at one end of the frame 1, and the shaft body is rotatably connected to the frame 1. The take-up shaft 6 winds up the processed drip irrigation tape.

[0047] The implementation principle of a drip irrigation tape punching device according to an embodiment of the present application is as follows: First, the user coils the drip irrigation tape to be processed into a roll, then installs it on the pay-off reel 2, pulls one end of the drip irrigation tape to pass it between the two vertical rollers 12, and then passes it through a plurality of guiding mechanisms 3 and support mechanisms 5 in sequence, and finally passes it between the two vertical rollers 12 and is fixed on the take-up shaft. During installation, it is required that the drip irrigation tape can be in good contact with the sponge sleeve 231 of the bending part 23 and pass through the slit between the portal beam 521 and the adjusting roller 522. The support component 53 is installed inside the drip irrigation tape and is located between the two limit frames 52 of the same support mechanism 5. Finally, by adjusting the motor adjusting seat 41, the height of the drill bit 43 is changed, the air-cooling pipe 44 is rotated to face the drilling position, and the power supply is turned on to start production.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A drip irrigation tape punching device, characterized in that: The invention comprises a frame (1), an unwinding shaft (2) arranged at one end of the frame (1), a plurality of guide mechanisms (3) arranged on the frame (1), a plurality of drilling mechanisms (4) arranged on the frame (1), a plurality of support mechanisms (5) arranged on the frame (1), and a winding shaft (6) arranged at the other end of the frame (1); the plurality of guide mechanisms (3) are evenly distributed along the length direction of the frame (1); the plurality of drilling mechanisms (4) are evenly distributed along the length direction of the frame (1) and are arranged alternately with the guide mechanisms (3); the support mechanism (5) comprises a base (51) vertically arranged on the frame (1), two limit frames (52) vertically arranged at both ends of the base (51), and a support assembly (53) arranged in the drip irrigation belt; The support assembly (53) comprises a shell (531), an adjusting rod (532) passing through the shell (531) along the length direction, a fastening nut (533) sleeved on one end of the adjusting rod (532) and abutting against the outer wall of the shell (531), a plurality of supporting rods (534) passing through the shell (531) perpendicular to the length direction, and a top plate (535) provided on the supporting rods (534); the adjusting rod (532) is rotatably connected to the shell (531), the fastening nut (533) is threadedly matched with the adjusting rod (532), and the adjusting rod (532) is meshed with the plurality of supporting rods (534).

2. The punching device for drip irrigation tape according to claim 1, wherein: The limiting frame (52) comprises a gate-shaped beam (521) vertically arranged on the base (51) and an adjusting roller (522) arranged on the gate-shaped beam (521), wherein the adjusting roller (522) is slidably connected to the gate-shaped beam (521) along a height direction of the gate-shaped beam (521).

3. The hole punching device for drip irrigation tape according to claim 1, characterized in that: The drilling mechanism (4) comprises a motor adjustment seat (41) arranged on the frame (1), a servo motor (42) arranged at one end of the motor adjustment seat (41), and a drill bit (43) drivingly connected to a power output shaft of the servo motor (42).

4. The punching device for drip irrigation tape according to claim 3, characterized in that: An air cooling pipe (44) is provided on the motor adjustment seat (41), and the air cooling pipe (44) is rotatably connected to the motor adjustment seat (41).

5. The drip irrigation tape punching device according to claim 1, characterized in that: The guide mechanism (3) comprises a rotating shaft (31) vertically passing through the frame (1) and a guide roller (32) sleeved on the rotating shaft (31).

6. The drip irrigation tape punching device according to claim 5, wherein: A plurality of heating coils (33) are fixedly arranged between the rotating shaft (31) and the guide roller (32), and the plurality of heating coils (33) are evenly arranged along the circumference of the rotating shaft (31).

7. The drip irrigation tape punching device according to claim 1, characterized in that: Adjustment angle steels (11) are provided at both ends of the frame (1), the adjustment angle steels (11) are slidably connected to the frame (1) in a direction perpendicular to the ground, two vertical rollers (12) are provided on the adjustment angle steel (11) in a direction perpendicular to the ground, and the roller shafts of the vertical rollers (12) are slidably connected to the adjustment angle steel (11) in a direction perpendicular to the frame (1).

8. The punching device for drip irrigation tape according to claim 1, characterized in that: On one side of the pay-off reel (2), there is an oil box (21). A tubing (22) passes through the oil box (21). The tubing (22) is in communication with the oil box (21) and is slidably connected along the direction perpendicular to the ground.

9. The punching device for drip irrigation tape according to claim 8, characterized in that: One end of the tubing (22) away from the oil box (21) is provided with a bending portion (23), and a sponge sleeve (231) is sleeved on the bending portion (23).

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