Uniform gluing device for filter element end cover of oil filter

Abstract

The utility model relates to the related technical field of filter element production, in particular to an oil filter element end cover uniform gluing device, which comprises a uniform gluing mechanism, a horizontal moving mechanism, a horizontal moving mechanism, a horizontal moving mechanism and a horizontal moving mechanism, the square frame is fixed on the sliding table of the translation unit; the detection mechanism is fixed on the sliding table of the translation unit and can detect the blockage condition; the sealing mechanism is fixed to one side of the lifting unit, the sealing mechanism comprises a gluing unit, and the gluing unit comprises a glue feeding pipe and can seal an end opening of the glue feeding pipe; and the two replacement mechanisms are fixed to the sliding table of the translation unit at equal intervals and can be rapidly disassembled and assembled. According to the glue feeding device, the inclined blocks are arranged to extrude the first L-shaped frames, so that the two first L-shaped frames are gathered in the middle, the glue feeding pipe can be sealed before the spray head is replaced, and the situation that during replacement, excessive glue leaks, resources are wasted, and the surrounding environment is affected is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of filter element production, specifically a device for uniformly applying adhesive to the end cap of an oil filter element. Background Technology

[0002] In the production process of oil filters, the uniform application of adhesive to the filter element end caps is crucial. The quality of the adhesive application directly affects the sealing performance, connection strength, and oil filtration efficiency of the oil filter, thus impacting the normal operation and service life of the engine.

[0003] Currently, the oil filter element end cap uniform adhesive application device has some problems in daily use. If the nozzle is not cleaned thoroughly after use, residual adhesive will gradually accumulate on the nozzle surface and inside, eventually clogging the nozzle orifice. Although the nozzle is checked for clogging before each use, the existing detection method has limitations and cannot determine whether local clogging has occurred. Once the nozzle is clogged, the machine needs to be stopped, and manual disassembly and cleaning are required. This process is not only cumbersome and time-consuming, but also affects production efficiency. Moreover, because local clogging cannot be detected in time, it is very easy to cause uneven adhesive application, affecting the adhesive quality of the filter element end cap, and thus reducing the product quality of the oil filter. Utility Model Content

[0004] The purpose of this invention is to provide a device for uniformly applying adhesive to the end cap of an oil filter element, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A device for uniformly applying adhesive to the end cap of an oil filter element, comprising:

[0007] A uniform adhesive application mechanism includes a lifting unit, on which a translation unit is fixedly connected;

[0008] A square frame is fixed to the slide of the translation unit;

[0009] The detection mechanism, fixed on the slide table of the translation unit, is capable of detecting blockages.

[0010] A sealing mechanism is fixed to one side of the lifting unit. The sealing mechanism includes an adhesive application unit, which includes an adhesive delivery tube and is capable of sealing the port of the adhesive delivery tube.

[0011] The replacement mechanism has two parts, which are fixed at equal intervals on the slide table of the translation unit, enabling quick disassembly and installation. The replacement mechanism includes:

[0012] Two L-shaped frames are provided and are fixed at equal angles to the slide table of the translation unit;

[0013] Ring frame two is fixed to the outer wall of two L-shaped frames two, and a circular shell is rotatably connected to the bottom of ring frame two;

[0014] Two square rods are provided and are fixed at equal angles to the outer wall of the circular shell. The outer wall of the square rod is slidably inserted into the inside of the socket.

[0015] Furthermore, the testing organization includes:

[0016] The annular shell is fixed to the slide of the translation unit;

[0017] The pressure sensor is fixed to the bottom of the ring housing.

[0018] Preferably, the sealing mechanism includes:

[0019] There are two elastic push rods, which are fixed at the same angle to one end of the glue delivery tube.

[0020] Ring frame one is fixed between two elastic push rods one;

[0021] The hose is fixed at one end of the glue delivery tube and one end of the ring frame.

[0022] Preferably, the sealing mechanism includes:

[0023] A fixing frame is fixed to the outer wall of the glue delivery tube, and elastic push rods are fixedly connected to the outer walls of both ends of the fixing frame;

[0024] An inclined block is fixed at one end of the elastic push rod, and the outer walls of the two inclined blocks are fixedly connected.

[0025] Preferably, the sealing mechanism includes:

[0026] Two slide rails are provided and are fixed at equal angles to the outer wall of the ring frame. An L-shaped frame is slidably inserted into the slide rail.

[0027] The spring is fixed between the outer wall of the L-shaped frame and the inner wall of the slide rail.

[0028] The nozzle is screwed onto the outer wall of the ring frame, and two sockets are fixedly connected to the outer wall of the nozzle at equal angles.

[0029] Preferably, the replacement mechanism includes:

[0030] The motor is fixed to the bottom of the slide of the translation unit, and the motor shaft is fixedly connected to the bottom of the circular shell.

[0031] Preferably, the replacement mechanism includes:

[0032] Water holes are provided in several places, which are opened at equal angles on the outer wall of the round shell;

[0033] Water hole two, located at the bottom of the round shell;

[0034] The second ring shell rotates on the outer wall of the circular shell at a water hole location, and a water inlet pipe is fixedly connected to the outer wall of the second ring shell.

[0035] The third ring shell rotates at the bottom of the circular shell, located at the second water hole, and a water outlet pipe is fixedly connected to the outer wall of the third ring shell.

[0036] The brush is fixed inside the round shell.

[0037] Compared with the prior art, the beneficial effects of this utility model are:

[0038] 1. By using a nozzle to spray glue into a sealed environment within the ring housing, a pressure sensor can accurately monitor pressure changes during glue spraying. When the nozzle becomes clogged or partially clogged, the resistance to glue spraying changes, resulting in pressure variations. Compared to traditional methods that rely solely on visual inspection or simple flow observation, the pressure sensor can more sensitively detect these subtle changes and promptly identify blockages. This not only reduces the workload of manual inspection but also prevents blockages from being missed due to human oversight, significantly improving the efficiency of quality monitoring during the production process.

[0039] 2. By setting up an inclined block to compress the L-shaped frame, the two L-shaped frames are brought together towards the middle, which can seal the glue delivery tube before replacing the nozzle, preventing excessive glue leakage during replacement, thus avoiding resource waste and impacting the surrounding environment.

[0040] 3. The replacement mechanism not only allows for quick disassembly and installation of the nozzles, but also enables the cleaning of the disassembled nozzles, effectively improving versatility. Furthermore, the entire process from disassembly and installation to cleaning requires no manual operation, significantly enhancing convenience and work efficiency while reducing labor intensity. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0042] Figure 2 This is a schematic diagram of the top structure of the uniform adhesive application mechanism in this utility model;

[0043] Figure 3 This is a partial structural diagram of the sealing mechanism in this utility model;

[0044] Figure 4 This is a schematic diagram of the L-shaped frame structure in this utility model;

[0045] Figure 5 This is a schematic diagram of the socket structure in this utility model;

[0046] Figure 6It is a schematic structural diagram of the replacement mechanism in the present utility model;

[0047] Figure 7 It is a schematic structural diagram of the circular shell in the present utility model;

[0048] Figure 8 It is a schematic internal structure diagram of the circular shell in the present utility model.

[0049] In the figure: 100, uniform gluing mechanism; 110, lifting unit; 120, translation unit; 121, square frame; 200, detection mechanism; 210, first ring shell; 211, pressure sensor; 300, sealing mechanism; 310, gluing unit; 311, glue delivery pipe; 312, first elastic push rod; 313, first ring frame; 314, hose; 320, fixing frame; 321, second elastic push rod; 322, inclined block; 330, slide rail; 331, first L-shaped frame; 332, spring; 340, nozzle; 341, socket; 400, replacement mechanism; 410, second L-shaped frame; 411, second ring frame; 412, square rod; 420, circular shell; 421, first water hole; 422, second water hole; 423, second ring shell; 424, water inlet pipe; 425, third ring shell; 426, water outlet pipe; 430, motor; 440, brush. Specific embodiments

[0050] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0051] Please refer to Figure 1-8In this embodiment of the present invention, an oil filter element end cap uniform adhesive coating device includes a uniform adhesive coating mechanism 100. The uniform adhesive coating mechanism 100 includes a lifting unit 110 and the following parts: a translation unit 120 is fixedly connected to the lifting unit 110, its square frame 121 is fixed to the slide of the translation unit 120, and a detection mechanism 200 is fixed to the slide of the translation unit 120, which can detect the blockage; its sealing mechanism 300 is fixed to one side of the lifting unit 110, and the sealing mechanism 300 includes an adhesive coating unit 310. The glue unit 310 includes a glue delivery tube 311, which can seal the port of the glue delivery tube 311. Two replacement mechanisms 400 are provided, which are fixed at equal intervals on the slide of the translation unit 120, and can be quickly disassembled and installed. The detection mechanism 200 includes the following parts: its ring shell 210 is fixed to the slide of the translation unit 120, and the pressure sensor 211 is fixed to the bottom of the ring shell 210. The glue is sprayed in a sealed manner through the nozzle 340 inside the ring shell 210, which enables the pressure sensor 211 to accurately monitor the pressure changes generated during glue spraying.

[0052] The sealing mechanism 300 includes the following parts: two elastic push rods 312 are fixed at equal angles to one end of the glue delivery tube 311, and a ring frame 313 is fixed between the two elastic push rods 312; a hose 314 is fixed to one end of the glue delivery tube 311 and one end of the ring frame 313; a fixing frame 320 is fixed to the outer wall of the glue delivery tube 311; elastic push rods 321 are fixedly connected to the outer walls of both ends of the fixing frame 320; inclined blocks 322 are fixed to one end of the elastic push rods 321; and the outer walls of the two inclined blocks 322 are fixedly connected; and a slide rail 330 is provided with... There are two components, fixed at equal angles to the outer wall of the ring frame 313. An L-shaped frame 331 is slidably inserted inside the slide rail 330. Its spring 332 is fixed between the outer wall of the L-shaped frame 331 and the inner wall of the slide rail 330. The nozzle 340 is screwed onto the outer wall of the ring frame 313. Two sockets 341 are fixedly connected at equal angles to the outer wall of the nozzle 340. By setting an inclined block 322 to squeeze the L-shaped frame 331, the two L-shaped frames 331 are brought together in the middle. The glue delivery tube 311 can be sealed before the nozzle 340 is replaced to prevent excessive glue leakage during replacement.

[0053] The replacement mechanism 400 includes the following parts: two L-shaped frames 410 are fixed at equal angles to the slide of the translation unit 120, and a ring frame 411 is fixed to the outer wall of the two L-shaped frames 410. A circular shell 420 is rotatably connected to the bottom of the ring frame 411. Two square rods 412 are fixed at equal angles to the outer wall of the circular shell 420, and the outer wall of the square rods 412 is slidably inserted into the socket 341. The motor 430 is fixed to the bottom of the slide of the translation unit 120, and the rotating shaft of the motor 430 is fixedly connected to the bottom of the circular shell 420. Several water holes 421 are provided. One nozzle 420 is equidistantly formed on the outer wall of the circular shell 420. The second water hole 422 is formed at the bottom of the circular shell 420. The second ring shell 423 rotates on the outer wall of the circular shell 420 and is located at the water hole 421. A water inlet pipe 424 is fixedly connected to the outer wall of the second ring shell 423. The third ring shell 425 rotates on the bottom of the circular shell 420 and is located at the water hole 422. A water outlet pipe 426 is fixedly connected to the outer wall of the third ring shell 425. The brush 440 is fixed inside the circular shell 420. The replacement mechanism 400 can not only quickly disassemble and install the nozzle 340, but also clean the disassembled nozzle 340.

[0054] Specifically, during operation, before applying the adhesive, it is necessary to check whether the nozzle 340 is clogged. The translation unit 120 drives the slide of the translation unit 120 to move to the position where the detection mechanism 200 is directly below the adhesive delivery tube 311. The lifting unit 110 drives the detection mechanism 200 to move upward until the nozzle 340 on the ring housing 210 is close to the adhesive delivery tube 311. The adhesive application unit 310 is then driven to spray adhesive. The adhesive is sprayed along the nozzle 340 into the inside of the ring housing 210 and onto the gasket of the pressure sensor 211. The pressure sensor 211 detects this and measures the adhesive sprayed simultaneously. Pressure is used to determine whether a blockage or partial blockage has occurred. When a blockage is detected in the nozzle 340, the lifting unit 110 drives the ring housing 210 to separate from the nozzle 340. The translation unit 120 drives one of the replacement mechanisms 400 to move to the position where the glue delivery tube 311 is directly below. The lifting unit 110 drives the nozzle 340 to be replaced to be inserted into the ring frame 411. During this period, the inclined block 322 moves down and contacts the square frame 121. The elastic push rod 321 is compressed and retracts. The inclined block 322 then contacts the L-shaped frame 331. 31 is squeezed and slides along the slide rail 330, causing the two L-shaped frames 331 to converge towards the middle, clamping the hose 314 and sealing one end of the glue delivery hose 311. After the glue delivery hose 311 is sealed, the socket 341 is inserted into the square rod 412. The motor 430 drives the round shell 420 to rotate, which in turn drives the nozzle 340 to rotate, removing the nozzle 340 from the glue delivery hose 311. The lifting unit 110, in conjunction with the translation unit 120, drives another replacement mechanism 400, which is equipped with a cleaned nozzle 340, to move to a position directly below the glue delivery hose 311 and connect with the ring frame 313. When the motor 430 is activated, the nozzle 340 is screwed onto the ring frame 313 to complete the replacement. The lifting unit 110 and the translation unit 120 drive the replacement mechanism 400 back to its original position. The glue application unit 310 drives the glue application work. One of the replacement mechanisms 400 drives the motor 430 to rotate the circular shell 420. The internal moving brush 440, together with the cleaning liquid entering through the water hole 421, cleans the nozzle 340 inside and out. The wastewater flows into the ring shell 425 through the water hole 422 and is discharged from the pipe connected to the water outlet pipe 426.

[0055] Example 1

[0056] like Figure 2 As shown, in this embodiment, the detection mechanism 200 includes the following parts: its annular shell 210 is fixed to the slide of the translation unit 120, and the pressure sensor 211 is fixed to the bottom of the annular shell 210.

[0057] In this embodiment, before applying the adhesive, it is necessary to check whether the nozzle 340 is clogged. The translation unit 120 drives the slide of the translation unit 120 to move to the position where the detection mechanism 200 is directly below the adhesive delivery tube 311. The lifting unit 110 drives the detection mechanism 200 to move upward until the nozzle 340 on the annular housing 210 is close to the adhesive delivery tube 311. The adhesive application unit 310 then sprays the adhesive, and the adhesive is sprayed along the nozzle 340 into the gasket of the pressure sensor 211 inside the annular housing 210. The pressure sensor 211 detects the pressure generated by the simultaneous spraying to determine whether there is a blockage or localization. To prevent clogging, the nozzle 340 seals and sprays the adhesive within the ring housing 210. This allows the pressure sensor 211 to accurately monitor pressure changes during adhesive spraying. When the nozzle 340 becomes clogged or partially clogged, the resistance to adhesive spraying changes, resulting in pressure variations. Compared to traditional methods that rely solely on visual inspection or simple flow observation, the pressure sensor 211 can more sensitively detect these subtle changes and promptly identify clogging issues. This not only reduces the workload of manual inspection but also prevents clogging from being overlooked due to human negligence, significantly improving the efficiency of quality monitoring during the production process.

[0058] like Figure 3-5 As shown, in this embodiment, the sealing mechanism 300 includes the following parts: two elastic push rods 312 are provided, fixed at an equal angle to one end of the glue delivery tube 311, and a ring frame 313 is fixed between the two elastic push rods 312; a flexible tube 314 is fixed to one end of the glue delivery tube 311 and one end of the ring frame 313; and a fixing frame 320 is fixed to the outer wall of the glue delivery tube 311. Elastic push rods 321 are fixedly connected to the outer walls of both ends of the fixing frame 320. Block 322 is fixed at one end of elastic push rod 321, and the outer walls of the two inclined blocks 322 are fixedly connected. There are two slide rails 330, which are fixed at equal angles to the outer wall of ring frame 313. An L-shaped frame 331 is slidably inserted inside the slide rail 330. Its spring 332 is fixed between the outer wall of the L-shaped frame 331 and the inner wall of the slide rail 330. The nozzle 340 is screwed onto the outer wall of ring frame 313. Two sockets 341 are fixedly connected at equal angles to the outer wall of the nozzle 340.

[0059] In practice, when nozzle 340 is detected to be clogged, the lifting unit 110 drives the ring housing 210 to separate from nozzle 340. The translation unit 120 drives one of the replacement mechanisms 400 to move to the position where the glue delivery tube 311 is directly below. The lifting unit 110 drives the nozzle 340 to be replaced to be inserted into the ring frame 411. During this period, the inclined block 322 moves down and contacts the square frame 121. The elastic push rod 321 is compressed and retracts. The inclined block 322 then contacts the L-shaped frame 331. The L-shaped frame 331 is compressed and slides along the slide rail 330, causing the two L-shaped frames 331 to converge towards the middle and clamp. The hose 314 seals one end of the glue delivery hose 311. By using a wedge block 322 to compress the L-shaped frame 331, the two L-shaped frames 331 are brought together in the middle. This seals the glue delivery hose 311 before replacing the nozzle 340, preventing excessive glue leakage during replacement, which would lead to resource waste and environmental impact. In addition, the square frame 121 is located on one side of the two replacement mechanisms 400, ensuring that the wedge block 322 is tightly attached to the square frame 121 whether the nozzle 340 is being removed or installed, thus keeping the glue delivery hose 311 sealed and effectively improving operational stability.

[0060] Example 2

[0061] like Figure 6-8 As shown, in this embodiment, the replacement mechanism 400 includes the following parts: two L-shaped frames 410 are provided, which are at equal angles to the slide of the translation unit 120, and the ring frame 411 is fixed to the outer wall of the two L-shaped frames 410. A circular shell 420 is rotatably connected to the bottom of the ring frame 411. Two square rods 412 are provided, which are fixed at equal angles to the outer wall of the circular shell 420. The outer wall of the square rods 412 is slidably inserted into the inside of the socket 341. The motor 430 is fixed to the bottom of the slide of the translation unit 120, and the motor 430... The rotating shaft is fixedly connected to the bottom of the circular shell 420. Several water holes 421 are provided on the outer wall of the circular shell 420 at equal angles. Water holes 422 are provided on the bottom of the circular shell 420. The second ring shell 423 rotates on the outer wall of the circular shell 420 and is located at the water hole 421. A water inlet pipe 424 is fixedly connected to the outer wall of the second ring shell 423. The third ring shell 425 rotates on the bottom of the circular shell 420 and is located at the water hole 422. A water outlet pipe 426 is fixedly connected to the outer wall of the third ring shell 425. The brush 440 is fixed inside the circular shell 420.

[0062] In practice, after the glue delivery tube 311 is sealed, the nozzle 340 moves down, and the socket 341 is inserted into the square rod 412. The motor 430 drives the round shell 420 to rotate, which in turn drives the nozzle 340 to rotate, removing the nozzle 340 from the glue delivery tube 311. The lifting unit 110, in conjunction with the translation unit 120, drives another replacement mechanism 400, equipped with a cleaned nozzle 340, to move to a position directly below the glue delivery tube 311 and into contact with the ring frame 313. The motor 430 then drives the nozzle 340 to screw onto the ring frame 313, completing the replacement. The lifting unit 110 and translation unit 120 then drive the replacement mechanism 400 back to its original position. The 310-type drive performs the glue application process. One of the replacement mechanisms, 400, drives the motor 430 to rotate the circular shell 420. The internally moving motor 430, in conjunction with the cleaning fluid entering through the first water hole 421, cleans the inside and outside of the nozzle 340. The wastewater flows through the second water hole 422 into the third annular shell 425 and then is discharged from the pipe connected to the outlet pipe 426. The replacement mechanism 400 not only allows for quick disassembly and installation of the nozzle 340 but also enables the cleaning of the disassembled nozzle 340, effectively improving its versatility. Furthermore, disassembly, installation, and cleaning all require no manual operation, effectively improving convenience and work efficiency while reducing labor intensity.

[0063] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0064] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for uniformly applying adhesive to the end cap of an oil filter element, characterized in that, include: The uniform adhesive application mechanism (100) includes a lifting unit (110) and a translation unit (120) is fixedly connected to the lifting unit (110); A square frame (121) is fixed on the slide of the translation unit (120); The testing mechanism (200) is fixed on the slide of the translation unit (120); A sealing mechanism (300) is fixed to one side of the lifting unit (110). The sealing mechanism (300) includes an adhesive applicator (310), which includes an adhesive delivery tube (311). Two replacement mechanisms (400) are provided and are fixed at equal intervals on the slide of the translation unit (120). The replacement mechanism (400) includes: Two L-shaped frames (410) are provided and are fixed at equal angles to the slide of the translation unit (120); Ring frame two (411) is fixed to the outer wall of two L-shaped frames two (410), and a round shell (420) is rotatably connected to the bottom of ring frame two (411); There are two square rods (412), which are fixed at equal angles to the outer wall of the round shell (420). The outer wall of the square rod (412) is slidably inserted into the socket (341).

2. The uniform adhesive coating device for the end cap of an oil filter element according to claim 1, characterized in that, Testing organizations (200) include: The annular shell (210) is fixed on the slide of the translation unit (120); The pressure sensor (211) is fixed to the bottom of the ring shell (210).

3. The uniform adhesive coating device for the end cap of an oil filter element according to claim 2, characterized in that, The sealing mechanism (300) includes; Two elastic push rods (312) are provided and are fixed at one end of the glue delivery tube (311) at equal angles; Ring frame 1 (313) is fixed between two elastic push rods 1 (312); The hose (314) is fixed at one end of the glue delivery hose (311) and one end of the ring frame (313).

4. The uniform adhesive coating device for the end cap of an oil filter element according to claim 3, characterized in that, The sealing mechanism (300) includes: The fixing frame (320) is fixed on the outer wall of the glue delivery tube (311), and elastic push rods (321) are fixedly connected to the outer walls of both ends of the fixing frame (320); The inclined block (322) is fixed at one end of the elastic push rod (321), and the outer walls of the two inclined blocks (322) are fixedly connected.

5. The uniform adhesive coating device for the end cap of an oil filter element according to claim 4, characterized in that, The sealing mechanism (300) includes: There are two slide rails (330), which are fixed at equal angles to the outer wall of the ring frame (313). An L-shaped frame (331) is slidably inserted inside the slide rail (330). Spring (332) is fixed between the outer wall of L-shaped frame (331) and the inner wall of slide rail (330); The nozzle (340) is screwed onto the outer wall of the ring frame (313), and two sockets (341) are fixedly connected at equal angles to the outer wall of the nozzle (340).

6. The uniform adhesive coating device for the end cap of an oil filter element according to claim 5, characterized in that, The replacement mechanism (400) includes: The motor (430) is fixed to the bottom of the slide of the translation unit (120), and the rotating shaft of the motor (430) is fixedly connected to the bottom of the round shell (420).

7. The uniform adhesive coating device for the end cap of an oil filter element according to claim 6, characterized in that, The replacement mechanism (400) includes: Water holes (421) are provided in several places, and are opened at equal angles on the outer wall of the circular shell (420); Water hole 2 (422) is located at the bottom of the round shell (420); The second ring shell (423) rotates on the outer wall of the round shell (420) at the water hole (421), and the outer wall of the second ring shell (423) is fixedly connected to the water inlet pipe (424); The third ring shell (425) rotates at the bottom of the round shell (420) at the second water hole (422), and the outer wall of the third ring shell (425) is fixedly connected to the water outlet pipe (426); The brush (440) is fixed inside the round shell (420).

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