Vertical lifting blow-drying tank

Abstract

The invention relates to the technical field of blow-drying grooves, in particular to a vertical lifting blow-drying groove which comprises a groove body, a cover opening air cylinder is fixedly connected to the side wall of the groove body, an air cylinder connecting base is slidably connected to the cover opening air cylinder, a shaft pin is installed on the air cylinder connecting base, two connecting pieces are rotatably connected to the shaft pin, and the vertical lifting blow-drying groove is formed by arranging a lead screw and other mechanisms. During use, when the lead screw rotates, the air knife can be driven to move up and down to blow-dry the surface of a product, compared with a traditional chain, the lead screw is simpler in structure and longer in service life, and compared with the traditional chain, the lead screw is more stable when driving the air knife to move; the tank chain can protect the air pipe, the air pipe is prevented from being excessively bent and stuck, the whole tank body is completely closed, water drops cannot be splashed out of the tank body in the blow-drying process, and meanwhile the running state of the whole tank body can be monitored in real time through the arrangement of the induction photoelectric device.

Description

Technical Field

[0001] The invention relates to the technical field of blow-drying tanks, in particular to a vertical lifting blow-drying tank. Background Art

[0002] A blow drying tank is a device or apparatus used to dry objects. It is widely used in industrial production, manufacturing, laboratories and other scenarios. A wind knife is usually installed in the blow drying tank. The wind knife is a key component to achieve the blow drying function. The wind knife is usually a long and narrow device with uniform air holes, which can blow out high-speed and uniform airflow to quickly blow away the moisture on the surface of the object.

[0003] The existing equipment tank body basically uses a fixed air knife or a chain-driven air knife to blow dry the workpiece, but these two blowing methods have disadvantages. The fixed air knife blowing method has a slow drying efficiency when facing larger workpieces, and when the chain drives the air knife to move, the air pipe connected to the air knife is prone to bending when it moves with the wind knife due to the lack of a protective device. At the same time, the existing air knife usually adopts a direct blowing method when drying the workpiece. If there are water droplets remaining on the workpiece, directly blowing on the workpiece will cause water droplets to splash. If the water droplets splash onto the non-waterproof mechanical parts of the blowing drying tank, it will affect the use of the entire blowing drying tank. Summary of the invention

[0004] The purpose of the present invention is to provide a vertical lifting drying tank to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a vertical lifting blow-drying tank, comprising a tank body, a side wall of the tank body is fixedly connected with a cover opening cylinder, a cylinder connecting seat is slidably connected to the cover opening cylinder, an axle pin is installed on the cylinder connecting seat, two connecting plates are rotatably connected to the axle pin, a connecting rod is installed on the outer walls of the two connecting plates, a cover plate is installed on the connecting rod, a plurality of hinges are fixedly connected to the cover plate, the other ends of the plurality of hinges are fixed to the outer wall of the tank body, a lifting mechanism is provided on the tank body, the lifting mechanism comprises a fixed plate arranged inside the tank body, guide rails are provided on both sides of the fixed plate, a screw rod is rotatably connected to the outer wall of the fixed plate, a wind knife mounting bracket is threadedly sleeved on the outer wall of the screw rod, a synchronous wheel is fixedly connected to the lower end of the fixed plate, and a synchronous belt is sleeved on the synchronous wheel.

[0006] Preferably, a bottom plate is installed on the side wall of the trough body, a servo motor is fixedly connected to the bottom plate, a guide wheel is provided at the output end of the servo motor, the end of the synchronous belt away from the synchronous wheel is sleeved on the guide wheel, a tensioning wheel assembly is provided on the outer side wall of the bottom plate, and the tensioning wheel assembly is in contact with the synchronous belt.

[0007] Preferably, a slider is slidably connected inside the guide rail, a wind knife is provided on the slider, air intake pipe joints are fixedly connected on both sides of the wind knife, tank chains are installed on both sides of the fixed plate, an air pipe is provided inside the tank chain, and the air pipe is connected to the air intake pipe joint.

[0008] Preferably, the interior of the trough body is fixedly connected with a hanger bearing plate, the interior of the trough body is rotatably connected with a linear bearing, a movable guide rod is provided at the bottom of the trough body, a cylinder plate is provided at the bottom of the movable guide rod, a cylinder is fixedly connected to the cylinder plate, a waterproof shield is provided on the cylinder, and a hanger bearing plate is provided on the cylinder.

[0009] Preferably, a plurality of induction photoelectric devices are arranged on both sides of the trough body, and a hanging device mechanism is arranged on the trough body.

[0010] Preferably, the hanger mechanism includes a hanger frame arranged inside the trough body, a radio frequency identifier is installed on the hanger frame, mounting plates are fixedly connected on both sides of the hanger frame, a plurality of clamps are installed on the mounting plates, the plurality of clamps clamp the product together, and limit plates are provided on the mounting plates on both sides.

[0011] Preferably, both sides of the hanger frame are fixedly connected with a liquid storage tank, an air inlet box is installed between the two liquid storage tanks, the bottom of the air inlet box is connected to an air outlet, a rotating rod is rotatably arranged inside the air outlet, both ends of the rotating rod pass through to the outside of the air outlet, a plurality of fan blades are fixedly connected to the outer wall of the rotating rod, a plurality of fan blades are arranged on the plurality of spreading pipes, the plurality of spreading pipes are connected to the interior of the rotating rod, a bottom hole and a top hole are respectively provided on the plurality of spreading pipes, a blocking member is slidably connected to the interior of the spreading pipe, a tension spring is arranged at the bottom of the blocking member, an end of the tension spring away from the blocking member is fixedly connected to the inner wall of the spreading pipe, and a limiting member is arranged inside the spreading pipe.

[0012] Preferably, the liquid storage tank is provided with a pluggable adding port, a covering ring is fixedly connected to the outer wall of the liquid storage tank, a liquid inlet pipe is connected to the covering ring, and one end of the liquid inlet pipe away from the covering ring is connected to the interior of the liquid storage tank, the end of the rotating rod is rotatably connected to the covering ring, and a plurality of through holes are provided at the end of the rotating rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Through the setting of mechanisms such as the screw rod, when the screw rod rotates, it will drive the wind knife to move up and down to dry the surface of the product. Compared with the traditional chain structure, the screw rod is simpler and has a longer service life. It is also more stable when driving the wind knife to move than the traditional chain. In addition, through the built-in air pipe in the tank chain, the tank chain will protect the air pipe when the wind knife moves up and down to prevent it from excessive bending and getting stuck. The entire tank body is completely enclosed. During the drying process, water droplets cannot splash outside the tank body. At the same time, through the setting of the sensor photoelectric device, the operating status of the entire tank body can be monitored in real time.

[0015] 2. Through the setting of the air inlet box and the air outlet and other mechanisms, before the air knife blows the product from top to bottom, the air knife will stay briefly on the side of the air inlet box. At this time, the nitrogen blown out by the air knife will be guided by the air inlet box and the air outlet and blow to the surface of the product from top to bottom. If there are water droplets on the surface of the product, the airflow blowing from top to bottom is consistent with the gravity flow direction of the water droplets, which can cause the moisture to flow down from the surface of the workpiece faster and accelerate the drying process. While blowing nitrogen vertically downward, the entire wind blade will also mix a small amount of isopropyl alcohol into the nitrogen. After mixing with nitrogen, the isopropyl alcohol molecules will be dispersed in the nitrogen, increasing the contact area with the air, further improving its evaporation rate, and causing the surrounding moisture to evaporate faster, thereby accelerating the overall drying speed and improving the efficiency of the subsequent air knife when blowing flat on the product surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the local structure of the present invention Figure 1 ;

[0018] Figure 3 It is a schematic diagram of the local structure of the present invention Figure 2 ;

[0019] Figure 4 The structure of the hanger frame of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 5 The structure of the hanger frame of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 6 for Figure 5 A magnified view of middle;

[0022] Figure 7 It is a schematic diagram of the partial structure of the hanger frame of the present invention;

[0023] Figure 8 It is a schematic diagram of the structure of the rotating rod and the fan blade of the present invention;

[0024] Fig. 9 for Figure 8 Enlarged view of middle B;

[0025] Fig.10 It is the nitrogen flow diagram of the present invention.

[0026] In the attached drawings, the parts represented by the reference numerals are as follows: 1. Limiting member; 2. Liquid inlet pipe; 3. Air inlet box; 4. Tank body; 5. Hanging frame; 6. RFID; 7. Clamp; 8. Product; 9. Mounting plate; 10. Fixing plate; 11. Guide rail; 12. Screw rod; 13. Air knife mounting bracket; 14. Waterproof shield; 15. Synchronous wheel; 16. Synchronous belt; 17. Cylinder; 18. Cylinder plate; 19. Inductive photoelectric device; 20. Slider; 21. Air inlet pipe joint; 22. Air knife; 23. Limiting plate; 24. Hinge; 25. Cover plate; 26. Connecting rod; 27. Connecting piece; 28. Cylinder connecting seat; 29. ​​Opening cylinder; 30. Axis pin; 31. Bottom plate; 32. Servo motor; 33. Movable guide rod; 34. Tensioning wheel assembly; 35. Tank chain; 36. Hanger bearing plate; 37. Linear bearing; 38. Liquid storage tank; 39. Adding port; 40. Air blowing port; 41. Bottom hole; 42. Rotating rod; 43. Fan blade; 44. Covering ring; 45. Through hole; 46. Sprinkling pipe; 47. Top hole; 48. Tension spring; 49. Blocking member. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example 1: Please refer to Figure 1 - Fig.10 , a vertical lifting blow-drying tank comprises a tank body 4, a side wall of the tank body 4 is fixedly connected with a cover opening cylinder 29, a cylinder connecting seat 28 is slidably connected to the cover opening cylinder 29, an axle pin 30 is installed on the cylinder connecting seat 28, two connecting pieces 27 are rotatably connected to the axle pin 30, a connecting rod 26 is installed on the outer wall of the two connecting pieces 27, a cover plate 25 is installed on the connecting rod 26, a plurality of hinges 24 are fixedly connected to the cover plate 25, the other ends of the plurality of hinges 24 are fixed to the outer wall of the tank body 4, a lifting mechanism is arranged on the tank body 4, the lifting mechanism comprises a fixed plate 10 arranged inside the tank body 4, guide rails 11 are opened on both sides of the fixed plate 10, a screw rod 12 is rotatably connected to the outer wall of the fixed plate 10, a wind knife mounting frame 13 is threadedly sleeved on the outer wall of the screw rod 12, a synchronous wheel 15 is fixedly connected to the lower end of the fixed plate 10, and a synchronous belt 16 is sleeved on the synchronous wheel 15.

[0029] A bottom plate 31 is installed on the side wall of the trough body 4, and a servo motor 32 is fixedly connected to the bottom plate 31. A guide wheel is provided at the output end of the servo motor 32, and one end of the synchronous belt 16 away from the synchronous wheel 15 is sleeved on the guide wheel. A tensioning wheel assembly 34 is provided on the outer wall of the bottom plate 31, and the tensioning wheel assembly 34 is in contact with the synchronous belt 16.

[0030] The guide rail 11 is internally slidably connected with a slider 20, the slider 20 is provided with a wind knife 22, both sides of the wind knife 22 are fixedly connected with an air intake pipe joint 21, and both sides of the fixed plate 10 are installed with a tank chain 35, the tank chain 35 is internally provided with an air pipe, and the air pipe is connected to the air intake pipe joint 21.

[0031] A hanger bearing plate 36 is fixedly connected inside the trough body 4, a linear bearing 37 is rotatably connected inside the trough body 4, a movable guide rod 33 is arranged at the bottom of the trough body 4, a cylinder plate 18 is arranged at the bottom of the movable guide rod 33, a cylinder 17 is fixedly connected to the cylinder plate 18, a waterproof shield 14 is arranged on the cylinder 17, and a hanger bearing plate 36 is arranged on the cylinder 17.

[0032] A plurality of inductive photoelectric devices 19 are arranged on both sides of the tank body 4 , and a hanging mechanism is arranged on the tank body 4 .

[0033] The hanger mechanism includes a hanger frame 5 arranged inside the trough body 4, a radio frequency identifier 6 is installed on the hanger frame 5, both sides of the hanger frame 5 are fixedly connected with mounting plates 9, a plurality of clamps 7 are installed on the mounting plates 9, and the plurality of clamps 7 clamp a product 8 together, and limit plates 23 are provided on the mounting plates 9 on both sides.

[0034] In this embodiment, when in use, the cover opening cylinder 29 can be started to push the cylinder connecting seat 28 to move, so that the two connecting pieces 27 can be flipped to both sides, and the cover plate 25 can be opened through the connecting rod 26. When the cover plate 25 is opened, the hanger frame 5 holding the product 8 can be placed in the trough body 4 until the bottom of the hanger frame 5 contacts the hanger bearing plate 36. After the hanger frame 5 is placed, the cover plate 25 is closed. Finally, the operator can turn on the servo motor 32 to drive the screw rod 12 to rotate through the synchronous wheel 15 and the synchronous belt 16. When the screw rod 12 rotates, the wind knife mounting frame 13 will drive the wind knife 22 to move up and down. When the wind knife 22 moves up and down, the induction photoelectric device 19 will limit the up and down movement of the wind knife 22. The air pipe is connected to the air inlet pipe joint 21 through the protection of the tank chain 35, and nitrogen is supplied to the inside of the wind knife 22. When the wind knife 22 moves up and down to blow out nitrogen, the water marks on the surface of the product 8 can be quickly dried. While the wind knife 22 moves up and down to blow out nitrogen to dry the water marks on the surface of the product 8, the operator can also open the cylinder 17 to push the cylinder plate 18 and the guide rod 33 to move, thereby changing the position of the hanger frame 5 through the hanger bearing plate 36, increasing the blowing length, size and area of ​​the hanger frame 5, so that all the water marks carried by it in the tank body 4 are dried, wherein the waterproof shield 14 protects the linear bearing 37. When the water marks on the surface of the product 8 are dried, the cover opening cylinder 29 can be started to repeat the above steps, open the cover plate 25, and take out the hanger frame 5.

[0035] Example 2: Please refer to Figure 1 - Fig.10 , this embodiment further explains Example 1. Liquid storage boxes 38 are fixedly connected to both sides of the hanger frame 5. An air inlet box 3 is installed between the two liquid storage boxes 38. The bottom of the air inlet box 3 is connected to an air outlet 40. A rotating rod 42 is rotatably arranged inside the air outlet 40. Both ends of the rotating rod 42 penetrate to the outside of the air outlet 40. A plurality of fan blades 43 are fixedly connected to the outer wall of the rotating rod 42. A plurality of fan blades 43 are arranged on a plurality of spraying pipes 46. The plurality of spraying pipes 46 are connected to the interior of the rotating rod 42. Bottom holes 41 and top holes 47 are respectively provided on the plurality of spraying pipes 46. A blocking member 49 is slidably connected to the interior of the spraying pipe 46. A tension spring 48 is arranged at the bottom of the blocking member 49. One end of the tension spring 48 away from the blocking member 49 is fixedly connected to the inner wall of the spraying pipe 46. A limiting member 1 is arranged inside the spraying pipe 46.

[0036] A pluggable adding port 39 is provided on the liquid storage tank 38, a covering ring 44 is fixedly connected to the outer wall of the liquid storage tank 38, a liquid inlet pipe 2 is connected to the covering ring 44, and one end of the liquid inlet pipe 2 away from the covering ring 44 is connected to the interior of the liquid storage tank 38, and the end of the rotating rod 42 is rotatably connected to the covering ring 44, and a plurality of through holes 45 are provided on the end of the rotating rod 42.

[0037] In this embodiment, the air knife 22, under the above principle, before drying the product 8 from top to bottom, will stay briefly on the side of the air inlet box 3. At this time, the nitrogen blown by the air knife 22 will enter the inside of the air outlet 40 through the air inlet box 3 (refer to Fig.10 ), after the nitrogen passes through the inside of the blowing port 40, it will blow the fan blade 43 to drive the rotating rod 42 to rotate. When the rotating rod 42 rotates together with the fan blade 43, the centrifugal force generated at this time will cause the blocking member 49 to overcome the tension of the tension spring 48 and move to the outside of the throwing pipe 46. When the throwing pipe 46 moves to the top of the bottom hole 41, the blocking member 49 no longer blocks the bottom hole 41. At this time, the liquid isopropyl alcohol in the rotating rod 42 will be thrown to the outside through the bottom hole 41 to mix with the nitrogen and blow vertically from top to bottom toward the product. 8. If there are water droplets on the surface of product 8, the airflow blowing from top to bottom is consistent with the gravity flow direction of the water droplets, which can cause the water to flow down from the surface of the workpiece faster and accelerate the drying process. After the nitrogen and isopropyl alcohol are mixed, the isopropyl alcohol molecules will be dispersed in the nitrogen, increasing the contact area with the air. Isopropyl alcohol has high volatility. When it works together with nitrogen, the rapid volatilization of isopropyl alcohol itself will take away a large amount of heat, forming a local low-temperature environment. The temperature reduction will reduce the saturated vapor pressure of water, and water will be more inclined to change from liquid to gas, so that its evaporation rate will be further increased, causing the surrounding water to evaporate faster, thereby accelerating the overall drying speed, so that the efficiency of the subsequent wind knife 22 when blowing flat on the surface of product 8 can be improved. If there are many water stains on the surface of product 8, the blowing power of the wind knife 22 can be increased at this time. When the blowing power of the wind knife 22 is increased, under the blowing of a larger nitrogen airflow, the fan blade 43 will drive the rotating rod 42 to rotate rapidly. When the rotating rod 42 rotates rapidly, under the action of a larger centrifugal force, the blocking member 49 will overcome the pulling The pulling force of spring 48 moves a greater distance outside top hole 47 until it contacts limiter 1. When blocking member 49 contacts limiter 1, blocking member 49 no longer blocks bottom hole 41 and top hole 47. At this time, liquid isopropyl alcohol in rotating rod 42 is thrown to the outside through bottom hole 41 and top hole 47 to mix with nitrogen. The amount of isopropyl alcohol thrown from throwing pipe 46 is increased compared with before. After it is mixed with more nitrogen, the drying efficiency can be further improved, thereby meeting the drying requirements of products 8 with more water stains.

[0038] It should be noted that when the rotating rod 42 rotates, the through hole 45 at its end will be driven to rotate synchronously. When the through hole 45 rotates to coincide with the open end of the liquid inlet pipe 2, the isopropyl alcohol in the liquid storage tank 38 will enter the rotating rod 42 through the through hole 45 through the liquid inlet pipe 2.

[0039] It should be noted that the air inlet box 3 and the air outlet 40 are not close to the surface of the hanger frame 5, and there is a gap between the hanger frame 5. When the product 8 needs to be installed, the product 8 can be inserted into the hanger frame 5 through the reserved gap, and then the product 8 can be clamped by multiple clamps 7.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vertical lifting drying tank, comprising a tank body (4), characterized in that: The side wall of the trough body (4) is fixedly connected with a cover opening cylinder (29), the cover opening cylinder (29) is slidably connected with a cylinder connection seat (28), an axle pin (30) is installed on the cylinder connection seat (28), two connecting plates (27) are rotatably connected to the axle pin (30), a connecting rod (26) is installed on the outer side walls of the two connecting plates (27), a cover plate (25) is installed on the connecting rod (26), a plurality of hinges (24) are fixedly connected to the cover plate (25), and the other ends of the plurality of hinges (24) are The trough body (4) is fixed on the outer wall of the trough body (4), and a lifting mechanism is arranged on the trough body (4). The lifting mechanism comprises a fixed plate (10) arranged inside the trough body (4), guide rails (11) are provided on both sides of the fixed plate (10), a screw rod (12) is rotatably connected to the outer wall of the fixed plate (10), a wind knife mounting frame (13) is threadedly sleeved on the outer wall of the screw rod (12), and a synchronous wheel (15) is fixedly connected to the lower end of the fixed plate (10), and a synchronous belt (16) is sleeved on the synchronous wheel (15).

2. The vertical lifting drying tank according to claim 1, characterized in that: A bottom plate (31) is installed on the side wall of the trough body (4), a servo motor (32) is fixedly connected to the bottom plate (31), a guide wheel is arranged at the output end of the servo motor (32), one end of the synchronous belt (16) away from the synchronous wheel (15) is sleeved on the guide wheel, and a tension wheel assembly (34) is arranged on the outer side wall of the bottom plate (31), and the tension wheel assembly (34) is in contact with the synchronous belt (16).

3. The vertical lifting drying tank according to claim 1 is characterized in that: The guide rail (11) is internally slidably connected with a slider (20), the slider (20) is provided with a wind knife (22), both sides of the wind knife (22) are fixedly connected with an air intake pipe joint (21), both sides of the fixed plate (10) are installed with a tank chain (35), an air pipe is provided inside the tank chain (35), and the air pipe is connected to the air intake pipe joint (21).

4. The vertical lifting drying tank according to claim 1, characterized in that: The interior of the trough body (4) is fixedly connected with a hanger bearing plate (36), the interior of the trough body (4) is rotatably connected with a linear bearing (37), a movable guide rod (33) is arranged at the bottom of the trough body (4), a cylinder plate (18) is arranged at the bottom of the movable guide rod (33), a cylinder (17) is fixedly connected to the cylinder plate (18), a waterproof shield (14) is arranged on the cylinder (17), and a hanger bearing plate (36) is arranged on the cylinder (17).

5. The vertical lifting drying tank according to claim 1, characterized in that: A plurality of inductive photoelectric devices (19) are arranged on both sides of the trough body (4), and a hanging device mechanism is arranged on the trough body (4).

6. The vertical lifting drying tank according to claim 5, characterized in that: The hanger mechanism comprises a hanger frame (5) arranged inside a trough body (4), a radio frequency identifier (6) being installed on the hanger frame (5), mounting plates (9) being fixedly connected on both sides of the hanger frame (5), a plurality of clamps (7) being installed on the mounting plates (9), the plurality of clamps (7) clamping a product (8) together, and limit plates (23) being arranged on both sides of the mounting plates (9).

7. The vertical lifting drying tank according to claim 6, characterized in that: Both sides of the hanger frame (5) are fixedly connected with liquid storage boxes (38), an air inlet box (3) is installed between the two liquid storage boxes (38), the bottom of the air inlet box (3) is connected with an air outlet (40), a rotating rod (42) is rotatably arranged inside the air outlet (40), both ends of the rotating rod (42) pass through the outside of the air outlet (40), a plurality of fan blades (43) are fixedly connected to the outer wall of the rotating rod (42), and a plurality of throwing blades (43) are arranged on the plurality of fan blades (43). Tube (46), multiple throwing tubes (46) are connected to the inside of the rotating rod (42), multiple throwing tubes (46) are respectively provided with bottom holes (41) and top holes (47), the inside of the throwing tube (46) is slidably connected with a blocking member (49), the bottom of the blocking member (49) is provided with a tension spring (48), one end of the tension spring (48) away from the blocking member (49) is fixedly connected to the inner wall of the throwing tube (46), and a limiting member (1) is provided inside the throwing tube (46).

8. The vertical lifting drying tank according to claim 7, characterized in that: The liquid storage tank (38) is provided with a pluggable addition port (39), the outer wall of the liquid storage tank (38) is fixedly connected with a covering ring (44), the covering ring (44) is connected with a liquid inlet pipe (2), one end of the liquid inlet pipe (2) away from the covering ring (44) is connected to the interior of the liquid storage tank (38), the end of the rotating rod (42) is rotatably connected to the covering ring (44), and the end of the rotating rod (42) is provided with a plurality of through holes (45).

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