External tubing for bagged grease

Abstract

This invention relates to the field of mechanical lubrication technology, and in particular to an external conduit for bagged grease. The external conduit includes a clamping component and a sleeve. The sleeve has a fluid channel and includes a conical section and a sleeve section. One end of the conical section is connected to the sleeve section, and the radial dimension of the conical section gradually decreases away from the sleeve section. An inlet is provided at the end of the conical section away from the sleeve section, communicating with the inlet of the fluid channel. An outlet is provided at the end of the sleeve section away from the conical section, communicating with the outlet of the flow channel. The clamping component includes multiple pressing plates and an elastic ring. The pressing plates are spaced apart circumferentially on the sleeve section and are bent away from the sleeve section. The elastic ring is fitted onto the pressing plates to clamp the grease bag onto the sleeve section. This external conduit for bagged grease avoids grease waste and facilitates grease dispensing and storage.

Description

Technical Field

[0001] This invention relates to the field of mechanical lubrication technology, and in particular to an external conduit for bagged grease. Background Technology

[0002] Manufacturers of idler rollers for belt conveyors can produce a large number of idler rollers every day. Each idler roller requires an appropriate amount of grease to be applied to the bearing area. When applying grease, the grease bag needs to be cut open, and the required amount of grease is scooped out with a small shovel or manually removed by hand and applied to the bearing surface. This grease is used to lubricate, protect, and seal the bearing. However, since the grease bag needs to be cut open during grease removal, it is impossible to avoid grease falling out during removal, resulting in grease waste and inconvenience in grease removal and storage. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide an external conduit for bagged grease, avoiding grease waste and facilitating grease dispensing and storage.

[0004] An external conduit for bagged grease according to an embodiment of the present invention includes: a tube having a fluid channel inside, the tube including a conical tip and a sleeve, one end of the conical tip being connected to the sleeve, the radial dimension of the conical tip gradually decreasing away from the sleeve, a fluid inlet at the end of the conical tip away from the sleeve, the fluid inlet communicating with the inlet of the fluid channel, and a fluid outlet at the end of the sleeve away from the conical tip, the fluid outlet communicating with the outlet of the fluid channel; and a clamping component including a plurality of pressing plates and an elastic ring, the plurality of pressing plates being spaced apart in the circumferential direction of the sleeve, the pressing plates being bent away from the sleeve, and the elastic ring being sleeved on the pressing plates to clamp the grease bag onto the sleeve.

[0005] The external conduit for bagged grease in embodiments of the present invention avoids grease waste and facilitates the use and storage of grease.

[0006] In some embodiments, the external conduit for bagged grease further includes a plurality of pivot seats, which are arranged circumferentially at intervals on the end of the sleeve section away from the conical tip section, and the pressing plate is pivotally connected to two adjacent pivot seats respectively.

[0007] In some embodiments, the pressing sheet includes a first arc segment and a second arc segment, one end of the first arc segment is connected to the second arc segment, and the arc length of the second arc segment gradually increases in the direction away from the first arc segment.

[0008] In some embodiments, the first arc segment and the second arc segment have a preset angle A, and 120°≤A≤165°.

[0009] In some embodiments, the external conduit for the bagged grease further includes a third arc-shaped segment, which is connected to the end of the second arc-shaped segment away from the first arc-shaped segment, and the arc length of the third arc-shaped segment is greater than the arc length of the second arc-shaped segment.

[0010] In some embodiments, the inner wall surfaces of the second and third arcuate segments are provided with anti-slip textures.

[0011] In some embodiments, the external conduit for bagged grease further includes a first limiting member and a second limiting member, wherein the first limiting member is connected to the end of the first arc segment away from the second arc segment, and the second limiting member is connected to the end of the third arc segment away from the second arc segment.

[0012] In some embodiments, the external conduit for bagged grease further includes a first magnetic block and a second magnetic block, the third arc-shaped segment is provided with a first groove for mounting the first magnetic block, and the sleeve segment is provided with a second groove near the end of the conical tip segment for mounting the second magnetic block, wherein the magnetic poles of the first magnetic block and the second magnetic block are opposite.

[0013] In some embodiments, the external conduit for bagged grease further includes a sealing cap, the sealing cap having an internal thread, and the end of the sleeve section away from the tapered tip section having an external thread that mates with the internal thread.

[0014] In some embodiments, the external conduit for the bagged grease further includes a dustproof component, which comprises a first dustproof sheet and a second dustproof sheet. The first and second dustproof sheets are connected to the end of the inner wall of the sleeve section away from the conical tip section. The dustproof component has an open state and a closed state.

[0015] In the closed state, the end of the first dustproof sheet away from the inner wall of the sleeve section contacts the end of the second dustproof sheet away from the inner wall of the sleeve section to close the liquid outlet. In the open state, the ends of the first dustproof sheet away from the inner wall and the ends of the second dustproof sheet away from the inner wall of the sleeve section move away from each other to open the liquid outlet. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an external conduit for bagged grease according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the sealing cap according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the first magnetic block according to an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the insert according to an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the elastic ring according to an embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of a dustproof component according to an embodiment of the present invention.

[0022] Figure label:

[0023] Insert 1, liquid guiding channel 11, conical tip section 12, liquid inlet 121, sleeve section 13, liquid outlet 131.

[0024] Clamping component 2, pressing plate 21, first arc-shaped segment 211, first inner ring groove 2111, second arc-shaped segment 212, third arc-shaped segment 213, pin 214, elastic ring 22.

[0025] Pivot 3,

[0026] First limiting component 4, second limiting component 5, first magnetic block 6, second magnetic block 7.

[0027] Dustproof component 8, first dustproof sheet 81, second dustproof sheet 82, grease bag 9, sealing cap 10. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] The external conduit for bagged grease in this embodiment of the invention includes a clamping component 2 and a sleeve 1. The sleeve 1 has a liquid guiding channel 11. The sleeve 1 includes a conical tip section 12 and a sleeve section 13. One end of the conical tip section 12 is connected to the sleeve section 13. The radial dimension of the conical tip section 12 gradually decreases in the direction away from the sleeve section 13. The end of the conical tip section 12 away from the sleeve section 13 is provided with a liquid inlet 121, which is connected to the inlet of the liquid guiding channel 11. The end of the sleeve section 13 away from the conical tip section 12 is provided with a liquid outlet 131, which is connected to the outlet of the liquid guiding channel. The clamping component 2 includes a plurality of pressing plates 21 and an elastic ring 22. The plurality of pressing plates 21 are arranged at intervals in the circumferential direction of the sleeve section 13. The pressing plates 21 are bent in the direction away from the sleeve section 13. The elastic ring 22 is sleeved on the pressing plates 21 to clamp the grease bag 9 onto the sleeve section 13.

[0030] Specifically, such as Figure 1As shown, the insert 1 extends in the left-right direction. The right end of the sleeve section 13 is provided with a liquid outlet 131. The left end of the sleeve section 13 is connected to the right end of the cone tip section 12. The left end of the cone tip section 12 is provided with a liquid inlet 121. The insert 1 has a liquid guiding channel 11 extending in the left-right direction. The inlet of the liquid guiding channel 11 is connected to the liquid inlet 121 to facilitate the entry of grease into the liquid guiding channel 11. The outlet of the liquid guiding channel 11 is connected to the liquid outlet 131 to facilitate the discharge of grease.

[0031] The radial dimension of the cone tip 12 gradually decreases from right to left. The left end of the cone tip 12 is suitable for inserting into the grease bag 9, and then the grease enters the left end of the liquid discharge channel from the left end of the cone tip 12. The grease in the liquid discharge channel then moves from left to right, and finally the grease is discharged from the outlet 131 of the sleeve section 13.

[0032] The pressing plate 21 is an arc-shaped plate, bent away from the sleeve section 13. The pressing plate 21 and the outer wall of the sleeve section 13 press the grease bag 9 together. The elastic ring 22 is sleeved on the pressing plate 21 so that the pressing plate 21 presses the grease bag 9 against the sleeve section 13. The elastic ring 22 presses multiple pressing plates 21 arranged circumferentially around the sleeve section 13. It can be understood that there can be multiple elastic rings 22, which are arranged laterally to fix the grease bag 9 on the sleeve section 13. The pressing plate 21 is bent away from the sleeve section 13 to cooperate with the sleeve section 13 to press the grease bag 9.

[0033] Furthermore, butyl rubber can be provided on the inner wall surface of the pressing sheet 21. When the inner wall surface of the pressing sheet 21 comes into contact with the grease bag 9, the butyl rubber on the inner wall surface of the pressing sheet 21 adheres to the grease bag 9, which facilitates the fixing and movement of the grease bag 9 and makes it easier to fix the insert 1 to the grease bag 9, thereby improving the convenience of taking grease from the grease bag 9.

[0034] The external conduit for bagged grease in this embodiment of the invention features an insert 1, the left end of which pierces the grease bag 9, facilitating the entry of grease from the insert 1 into the liquid channel 11 for grease dispensing. A clamping component 2 secures the grease bag 9 to the insert 1, preventing grease from overflowing between the insert 1 and the grease bag 9 during dispensing, thus avoiding waste and facilitating grease dispensing. When grease dispensing is not required, the outlet 131 can be sealed for grease preservation. Furthermore, the external conduit for bagged grease in this embodiment of the invention allows for easy removal of the sleeve and clamping component 2 from the grease bag 9, facilitating multiple uses and reducing operating costs.

[0035] Understandably, a grease inlet can be provided at the left end of the sleeve section to introduce grease and improve the smoothness of grease extrusion.

[0036] In some embodiments, the external conduit for bagged grease also includes a plurality of pivot seats 3, which are arranged circumferentially at intervals on the end of the sleeve section 13 away from the cone tip section 12, and the pressing piece 21 is pivotally connected to two adjacent pivot seats 3 respectively.

[0037] Specifically, such as Figures 1 to 6 As shown, pivot seats 3 are spaced apart circumferentially on the sleeve section 13, and the pivot seats 3 are located at the right end of the sleeve section 13. The pressing plate 21 is pivotally connected to two adjacent pivot seats 3. For example, the pressing plate 21 is provided with two pins 214, and the pivot seats 3 are provided with through holes. One pin 214 of the pressing plate 21 extends at least partially into the through hole of one of the two adjacent pivot seats 3, and the other pin 214 of the pressing plate 21 extends at least partially into the through hole of the other of the two adjacent pivot seats 3. Thus, the pressing plate 21 is rotatable relative to the sleeve section 13. The left end of the pressing plate 21 moves away from or closer to the sleeve section 13 to release or press the grease bag 9. When pressing the grease bag 9, the grease bag 9 is between the pressing plate 21 and the sleeve section 13. The elastic ring 22 is sleeved on the outer peripheral surface of the pressing plate 21 to press the pressing plate 21 against the sleeve section 13 to fix the grease bag 9.

[0038] In some embodiments, the pressing sheet 21 includes a first arc segment 211 and a second arc segment 212, one end of the first arc segment 211 is connected to the second arc segment 212, and the arc length of the second arc segment 212 gradually increases in the direction away from the first arc segment 211.

[0039] Specifically, such as Figures 1 to 6 As shown, the right end of the first arc segment 211 is arranged between two adjacent pivot seats 3. The first arc segment 211 is connected to the pivot shaft so that the first arc segment 211 can rotate relative to the sleeve segment 13. The arc length of the second arc segment 212 gradually increases from right to left. When the second arc segment 212 presses the grease bag 9, the arc length of the second arc segment 212 gradually increases from right to left to increase the contact area between the second arc segment 212 and the grease bag 9 when pressing the grease bag 9, thereby improving the stability and safety of the grease bag 9 when it is fixed.

[0040] In some embodiments, a preset angle A is provided between the first arc segment 211 and the second arc segment 212, and 120°≤A≤165°.

[0041] Specifically, such as Figures 1 to 6 As shown, the second arc segment 212 is inclined radially upward along the sleeve segment 13, and there is a preset angle A between the first arc segment 211 and the second arc segment 212. A can be 120°, 130°, 140°, 150°, 160°, or 165°.

[0042] When the insert 1 needs to be inserted into the grease bag 9, the first arc segment 211 rotates clockwise, and the left end of the second arc segment 212 moves away from the sleeve segment 13, making it easier for the grease bag 9 to enter between the sleeve segment 13 and the second arc segment 212. When it is necessary to fix the grease bag 9, the first arc segment 211 rotates counterclockwise, and the left end of the second arc segment 212 moves closer to the sleeve segment 13 to fix the grease bag 9, thereby pressing and fixing the grease bag 9. By setting a preset angle A, it is easy to fix and release, and thus easy to take out and store the grease bag 9, improving the stability and convenience of using the external catheter for bagged grease.

[0043] In some embodiments, the external conduit for bagged grease further includes a third arc segment 213, which is connected to the end of the second arc segment 212 away from the first arc segment 211, and the arc length of the third arc segment 213 is greater than the arc length of the second arc segment 212.

[0044] Specifically, such as Figures 1 to 6 As shown, the third arc segment 213 is connected to the left end of the second arc segment 212. The third arc segment 213 is coaxially arranged with the second arc segment 212 in the left-right direction. The arc length of the third arc segment 213 is greater than the arc length of the second arc segment 212, thereby increasing the contact area between the third arc segment 213 and the grease bag 9, improving the stability and sealing of the grease bag 9 when it is fixed, and thus improving the stability and convenience of using the external conduit for bagged grease.

[0045] Understandably, the third arc segment 213 and the second arc segment 212 can also undergo certain deformation under the compression of the elastic ring 22, which facilitates the compression and fixation of the grease bag 9.

[0046] Understandably, a reinforcing ring can also be fitted around the outer periphery of the pressing sheet 21 to press the pressing sheet together, while an elastic ring 22 is fitted around the outer periphery of the reinforcing ring to increase the clamping force on the pressing sheet. The reinforcing ring is larger than the elastic ring 22 in the left-right direction to increase the contact area when pressing the pressing sheet. The reinforcing ring is made of rubber to provide elasticity.

[0047] Furthermore, the inner walls of the second arc-shaped segment 212 and the third arc-shaped segment 213 are provided with anti-slip textures to increase the friction between the grease bag 9 and the pressing sheet 21 when the grease bag 9 is fixed, thereby improving the stability of the external conduit for the bagged grease. It is understood that the anti-slip textures can be cross-shaped, or other existing shapes.

[0048] In some embodiments, the external conduit for bagged grease further includes a first limiting member 4 and a second limiting member 5. The first limiting member 4 is connected to the end of the first arc segment 211 that is away from the second arc segment 212, and the second limiting member 5 is connected to the end of the third arc segment 213 that is away from the second arc segment 212.

[0049] Specifically, such as Figures 1 to 6 As shown, the first limiting member 4 is connected to the right end of the first arc-shaped segment 211, and the second limiting member 5 is connected to the left end of the third arc-shaped segment 213, thereby facilitating the limiting and fixing of the elastic ring 22 and improving the stability and convenience of using the external conduit for bagged grease. It can be understood that the right segment of the first arc-shaped segment 211 is provided with a first inner annular groove 2111 to facilitate the compression of the first limiting member 4, making it easier to fit the elastic ring 22 onto the outer circumferential surface of the pressing sheet 21.

[0050] In some embodiments, the external conduit for bagged grease further includes a first magnetic block 6 and a second magnetic block 7. The third arc-shaped segment 213 is provided with a first groove for mounting the first magnetic block 6, and the sleeve segment 13 is provided with a second groove at one end near the conical tip segment 12 for mounting the second magnetic block 7. The magnetic poles of the first magnetic block 6 and the second magnetic block 7 are opposite.

[0051] Specifically, such as Figures 1 to 6 As shown, the inner or outer wall surface of the left end of the third arc segment 213 is provided with a first groove for installing the first magnetic block, and the outer or inner wall surface of the sleeve segment 13 is provided with a second groove for installing the second magnetic block 7. The magnetic poles of the first magnetic block and the second magnetic block 7 are opposite to attract the pressing sheet 21 and the sleeve to each other, so as to fix and seal the grease bag 9.

[0052] In some embodiments, the external conduit for bagged grease also includes a sealing cap 10, the sealing cap 10 having an internal thread, and the sleeve section 13 having an external thread that mates with the internal thread at one end away from the tapered tip section 12.

[0053] Specifically, such as Figures 1 to 6 As shown, the sealing cap 10 seals the outlet 131 of the sleeve section 13 via threads. When grease is not needed, the sealing cap 10 is connected to the sleeve section 13 via threads to seal and store the grease bag 9, preventing the grease from oxidizing due to contact with air. When grease needs to be used, the sealing cap 10 is opened, and the grease is taken out of the sealed bag. By setting the sealing cap 10, it is easy to seal and use the grease, improving the stability and convenience of using the external conduit for bagged grease.

[0054] In some embodiments, the external conduit for bagged grease further includes a dustproof component 8, which includes a first dustproof sheet 81 and a second dustproof sheet 82. The first dustproof sheet 81 and the second dustproof sheet 82 are connected to the end of the inner wall of the sleeve section 13 away from the conical tip section 12. The dustproof component 8 has an open state and a closed state.

[0055] In the closed state, the end of the first dustproof sheet 81 away from the inner wall of the sleeve section 13 contacts the end of the second dustproof sheet 82 away from the inner wall of the sleeve section 13 to close the liquid outlet 131. In the open state, the end of the first dustproof sheet 81 away from the inner wall and the end of the second dustproof sheet 82 away from the inner wall of the sleeve section 13 move away from each other to open the liquid outlet 131.

[0056] Specifically, such as Figures 1 to 6 As shown, the first dustproof sheet 81 and the second dustproof sheet 82 can be made of rubber. The left end of the first dustproof sheet 81 is connected to the inner wall surface of the left end of the sleeve, and the left end of the second dustproof sheet 82 is connected to the inner wall surface of the left end of the sleeve.

[0057] The right ends of the first dustproof sheet 81 and the second dustproof sheet 82 are brought close together to seal the outlet of the liquid guiding channel 11, thereby preventing dust from entering the liquid guiding channel 11 and contaminating the grease. In the closed state, the right ends of the first dustproof sheet 81 and the second dustproof sheet 82 are in contact with each other to seal the outlet of the liquid guiding channel 11. In the open state, or as can be understood, the operator squeezes the grease bag 9 to squeeze the grease out of the liquid guiding channel 11. At this time, the first dustproof sheet 81 and the second dustproof sheet 82 are moved away from each other by force, that is, the right ends of the first dustproof sheet 81 and the second dustproof sheet 82 are moved away from each other to open the liquid guiding channel 11.

[0058] The external conduit for bagged grease in this embodiment of the invention, by providing a dustproof component 8, ensures that when grease is taken from the grease bag 9, the right ends of the first dustproof sheet 81 and the second dustproof sheet 82 move away from each other to open the liquid guiding channel 11. When grease needs to be stored, since there is no compression on the grease bag 9 at this time, under the action of negative pressure, the right ends of the first dustproof sheet 81 and the second dustproof sheet 82 come into contact with each other to seal the grease bag 9, thereby improving the convenience and stability of using the external conduit for bagged grease.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0063] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An external conduit for bagged lubricating grease, characterized in that, include: The insert has a fluid guiding channel inside. The insert includes a conical tip section and a sleeve section. One end of the conical tip section is connected to the sleeve section. The radial dimension of the conical tip section gradually decreases in the direction away from the sleeve section. The conical tip is provided with a liquid inlet at the end away from the sleeve section, and the liquid inlet is connected to the inlet of the liquid guiding channel. The sleeve section is provided with a liquid outlet at the end away from the conical tip, and the liquid outlet is connected to the outlet of the liquid guiding channel. The conical tip is used to pierce an unopened grease bag. A clamping component includes multiple pressing plates and an elastic ring. The multiple pressing plates are arranged at intervals in the circumferential direction of the sleeve section. The pressing plates are bent away from the sleeve section. The elastic ring is sleeved on the pressing plates to clamp the grease bag onto the sleeve section. The pressing plates include a first arc segment and a second arc segment. One end of the first arc segment is connected to the second arc segment. The arc length of the second arc segment gradually increases in the direction away from the first arc segment. There is a preset angle A between the first arc segment and the second arc segment, and 120°≤A≤165°. Multiple pivot seats are arranged circumferentially at intervals on the end of the sleeve section away from the conical tip section, and the pressing piece is pivotally connected to two adjacent pivot seats respectively; The third arc segment is connected to the end of the second arc segment away from the first arc segment, and the arc length of the third arc segment is greater than the arc length of the second arc segment; The first magnetic block and the second magnetic block are provided. The third arc segment is provided with a first groove for installing the first magnetic block. The sleeve segment is provided with a second groove near the end of the conical tip segment for installing the second magnetic block. The magnetic poles of the first magnetic block and the second magnetic block are opposite.

2. The external conduit for bagged grease according to claim 1, characterized in that, The inner walls of the second and third arc-shaped segments are provided with anti-slip textures.

3. The external conduit for bagged grease according to claim 1, characterized in that, It also includes a first limiting member and a second limiting member, wherein the first limiting member is connected to the end of the first arc segment away from the second arc segment, and the second limiting member is connected to the end of the third arc segment away from the second arc segment.

4. The external conduit for bagged grease according to claim 1, characterized in that, It also includes a sealing cap, which has an internal thread, and the sleeve section at the end away from the cone tip section has an external thread that mates with the internal thread.

5. The external conduit for bagged grease according to claim 1, characterized in that, It also includes a dustproof component, which comprises a first dustproof sheet and a second dustproof sheet. The first and second dustproof sheets are connected to the end of the inner wall of the sleeve section away from the conical tip section. The dustproof component has an open state and a closed state. In the closed state, the end of the first dustproof sheet away from the inner wall of the sleeve section contacts the end of the second dustproof sheet away from the inner wall of the sleeve section to close the liquid outlet. In the open state, the ends of the first dustproof sheet away from the inner wall and the ends of the second dustproof sheet away from the inner wall of the sleeve section move away from each other to open the liquid outlet.

Images