A paint bucket filter tip

Abstract

The utility model relates to a kind of paint barrel filter, it includes the first shell cover and second shell cover with stepped inner wall, multiple fastener being set on the first shell cover and second shell cover, the feed pipe being communicated with the adjusting pipe with pipe cover being set on the first shell cover, the sealing ring being nested on the opening of the stepped inner wall of the first shell cover, the filter screen being embedded on the opening of the stepped inner wall of the second shell cover, and the discharge pipe being communicated with the second shell cover, the feed end of the feed pipe is used to be connected to storage tank by valve, the axial end surface of the sealing ring is tightly contacted with the circumferential edge of the filter screen.The utility model guarantees the advantages of filtering efficiency and filtering quality.

Description

Technical Field

[0001] This utility model relates to the technical field of paint and adhesive production, and in particular to a paint drum filter tip. Background Technology

[0002] Printing paste, also known as pigment printing paste, is a paste-like mixture in which pigments, with the help of film-forming substances, are mechanically fixed onto the surface of fibrous fabrics to obtain colored printed patterns. Paste printing is suitable for various fibers and their blends or interwoven fabrics. Its process is simple, eliminating the need for wet processing, producing no waste liquid or washing liquid, and boasts advantages such as a complete range of usable pigments, vibrant colors, clear printed patterns, and high resistance to light and acids / alkalis. Currently, printing paste is mainly composed of pigment paste, film-forming substances, thickeners, crosslinking agents, catalysts, and other raw materials. It is processed through grinding, dispersion, mixing, thickening, and high-speed shear homogenization emulsification. The paste is then transferred from large-capacity storage tanks to small-capacity plastic drums for subsequent transportation and sales.

[0003] Currently, the dispensing of paint paste mainly involves installing a filter nozzle with a valve on the storage tank, and then relying on the paint paste's own gravity to flow out of the filter nozzle into a plastic bucket. For paint pastes with different fineness requirements, the corresponding mesh size filter screen needs to be replaced during dispensing. After prolonged use, on the one hand, the filter screen is prone to clogging, affecting the flow rate and dispensing quality of the paint paste, and cleaning the clogged filter screen is also quite difficult. If it is not cleaned in time, it will further reduce dispensing efficiency. On the other hand, frequent replacement reduces the stability of the fasteners, and the filter screen is prone to loosening inside the filter nozzle. It may not be able to effectively intercept some small particles of impurities in the paint paste, causing some impurities to enter the plastic bucket and affecting product quality. Utility Model Content

[0004] The problem this invention aims to solve is to provide a paint drum filter nozzle that addresses the aforementioned shortcomings in the existing technology, and has the advantages of ensuring filtration efficiency and filtration quality.

[0005] The above-mentioned objective of this utility model is achieved through the following technical solution: A paint canister filter includes a first housing and a second housing with stepped inner walls, a plurality of fasteners disposed on the first housing and the second housing, a feed pipe connected to the first housing and an adjusting pipe with a cap, a sealing ring nested in an opening in the stepped inner wall of the first housing, a filter screen embedded in an opening in the stepped inner wall of the second housing, and a discharge pipe connected to the second housing. The feed end of the feed pipe is used to connect to a storage tank via a valve, and the axial end face of the sealing ring tightly abuts against the circumferential edge of the filter screen.

[0006] By adopting the above technical solution, during the paint filling process, the feed pipe and the dispensing port of the receiving bag in the storage tank are pre-connected via a valve. After entering the feed pipe, the paint slurry first flows into the first housing. Because the sealing ring tightly abuts against the circumferential edge of the filter screen, it effectively prevents the paint slurry from flowing around the filter screen through the gap between the two, ensuring that all paint slurry must be filtered through the filter screen. Furthermore, since the filter screen is embedded in the inner wall opening of the stepped second housing, it can effectively intercept impurities in the paint slurry. Paint slurry that meets the fineness requirements will pass through the filter screen and then flow into the plastic bucket through the discharge pipe. When the filter screen needs to be clogged, it can be operated through the regulating pipe, i.e., closing the filter screen. The valve is opened, the pipe cover is opened, and the discharge pipe is used to backwash the regulating pipe, so that large particles that are clogging the filter screen can be removed, making the cleaning operation more convenient and effectively reducing the time and difficulty of cleaning the filter screen. This avoids the filter screen clogging affecting the flow rate and packaging quality of the paint slurry, thus ensuring the efficiency of the entire paint packaging process. In addition, multiple fasteners set on the first and second shells ensure the stability of the connection between the first and second shells, preventing the filter screen from loosening. Even after long-term use, it can effectively prevent the filter screen from shaking inside the filter nozzle, ensuring the interception effect of small particulate impurities in the paint slurry, thereby ensuring the filtration quality.

[0007] The present invention is further configured such that the end walls of the inner walls of the steps of the first and second housings are configured as arc-shaped concave guide surfaces.

[0008] By adopting the above technical solution, the concave arc-shaped guide surface can make the paint slurry flow more smoothly to the filter screen and the discharge pipe, reducing the flow resistance of the paint slurry in the first and second housings, and avoiding the accumulation of paint slurry at the end wall. This helps to improve the flow efficiency of the paint slurry, so that more paint slurry can reach the filter screen for filtration and discharge quickly and evenly.

[0009] The present invention is further configured such that a plurality of the fasteners are evenly distributed along the circumference of the first housing.

[0010] By adopting the above technical solution, the uniformly distributed fasteners can ensure that the first and second housings are subjected to balanced fastening forces in all directions, avoiding the problem of unstable connection caused by uneven local forces. This makes the structure of the entire filter nozzle more stable and reliable. During the coating filling process, even if subjected to the impact force and pressure changes of the coating slurry flow, the first and second housings can be tightly connected together without loosening or separation.

[0011] The present invention is further configured such that: the fastener includes a positioning groove through which the first housing and the second housing are opened, a pair of washers disposed on the first housing and symmetrically arranged on both sides of the positioning groove, a positioning bolt passing through the pair of washers, a positioning nut threadedly connected to the positioning bolt, a screw passing through the positioning groove, and a hand-tightening nut, one end of the screw being rotatably sleeved on the positioning bolt, and the other end being threadedly connected to the hand-tightening nut, the hand-tightening nut being tightly abutting against the surface of the second housing away from the first housing.

[0012] By adopting the above technical solution, the positioning groove provides a path for the screw to pass through, ensuring the accuracy and stability of the screw's installation position. The cooperation of the positioning bolt and positioning nut allows one end of the screw to be rotatably fitted into it, enabling the screw to rotate flexibly during installation and disassembly, facilitating operation. The threaded connection between the hand-tightening nut and the screw allows workers to manually tighten or loosen it without the need for additional tools, improving the efficiency of installation and disassembly. When the hand-tightening nut is tightened, it tightly abuts against the surface of the second housing opposite to the first housing, thus firmly connecting the first and second housings together. This connection method is not only strong and reliable, but also allows for easy and quick loosening of the hand-tightening nut to separate the first and second housings when cleaning, maintaining, or replacing the filter screen, facilitating subsequent work. At the same time, this structural design ensures that the connections between the components of the entire filter remain stable during long-term use, even after multiple installations and disassemblies, without loosening or failure, guaranteeing the normal use and filtration effect of the filter during the paint container filling process.

[0013] The present invention is further configured such that: the sealing ring includes a first plastic bracket, a rubber bracket, a spring, an adjusting ring, a limiting ring, and a second plastic bracket; the first plastic bracket and the second plastic bracket have approximately U-shaped cross-sections and are arranged symmetrically; the first plastic bracket is sequentially and tightly nested on the stepped inner wall of the first housing and on the rubber bracket; the two ends of the rubber bracket respectively tightly abut against the U-shaped inner wall of the first plastic bracket and the axial end face of the adjusting ring; the spring is sleeved on the rubber bracket; the two axial end faces of the limiting ring respectively tightly abut against the axial end face of the adjusting ring and the U-shaped inner wall of the second plastic bracket; the second plastic bracket is tightly sleeved on the limiting ring and tightly nested on the first plastic bracket.

[0014] By adopting the above technical solution, the first and second plastic supports are symmetrically arranged and have an approximately U-shaped cross-section. The first plastic support is tightly nested within the stepped inner wall of the first housing and the rubber support. This shape not only provides stable support and installation space for other components but also ensures a tight connection between the sealing ring and the first housing, preventing paint leakage from the connection point during container filling. The two ends of the rubber support are respectively tightly abutted against the U-shaped inner wall of the first plastic support and the axial end face of the adjusting ring. A spring is sleeved on the rubber support, and the elasticity of the spring ensures that the rubber support remains in a tight fit, further enhancing the sealing effect. When pressure changes occur during paint filling, the spring acts as a buffer and adjuster, ensuring the sealing ring functions stably under different pressure conditions. The two axial end faces of the limiting ring tightly abut against the axial end face of the adjusting ring and the U-shaped inner wall of the second plastic bracket. The second plastic bracket is tightly fitted onto the limiting ring and nested within the first plastic bracket. This layered and tightly abutting structure effectively prevents relative displacement between components, ensuring the overall stability of the sealing ring structure. Even during long-term use, it avoids sealing failure caused by loose components. Furthermore, this type of sealing ring is easy to install and remove. When cleaning, maintaining, or replacing the filter, the sealing ring can be easily removed from the first housing and quickly and accurately reinstalled without affecting the normal use and filtration effect of the filter. This design also reduces the risk of damage to the sealing ring, increases its service life, and thus lowers operating costs.

[0015] The present invention is further configured such that: the rubber bracket includes a V-shaped neck, connecting portions symmetrically arranged on both sides of the neck, and an abutting portion disposed on one of the connecting portions; the circumferential inner wall of the neck tightly abuts against the U-shaped inner wall of the first plastic bracket; the abutting portion tightly abuts against the U-shaped inner wall of the first plastic bracket; and the other connecting portion tightly abuts against the axial end face of the adjusting ring.

[0016] By adopting the above technical solution, the unique V-shaped neck design of the rubber bracket allows it to fit tightly against the U-shaped inner wall of the first plastic bracket. This fitting method not only increases the contact area but also effectively prevents the coating from leaking from the connection point during the filling process. Simultaneously, the symmetrically arranged connecting parts, one tightly abutting against the axial end face of the adjusting ring and the other tightly contacting the U-shaped inner wall of the first plastic bracket through its abutting part, form a closed sealing space, further enhancing the sealing effect. During the coating filling process, when the pressure of the coating changes, the V-shaped neck structure provides a certain elastic buffering effect. It can deform appropriately according to the pressure, thereby ensuring that the rubber bracket, the first plastic bracket, and the adjusting ring always maintain a tight connection, avoiding seal failure due to pressure changes.

[0017] The present invention is further configured such that: one end of the first plastic bracket is bent outward and extends to form a first limiting terminal, and the first limiting terminal is arranged relative to the axial end face of the neck.

[0018] By adopting the above technical solution, the rubber support can be prevented from easily detaching from the first plastic support.

[0019] The present invention is further configured such that: the cross-section of the adjusting ring is T-shaped, and the inner wall of the other connecting part is tightly abutting against the outer wall of the T-shaped adjusting ring.

[0020] By adopting the above technical solution, it is beneficial to improve the sealing performance.

[0021] The present invention is further configured such that an L-shaped retaining ring is provided between the limiting ring and the second plastic bracket.

[0022] By adopting the above technical solution, it is beneficial to improve the sealing performance.

[0023] The present invention is further configured such that: one end of the second plastic bracket is bent outward and extends to form a second limiting terminal, and the second limiting terminal is arranged relative to the axial end face of the first plastic bracket.

[0024] By adopting the above technical solution, the first plastic bracket can be prevented from easily detaching from the second plastic bracket.

[0025] In summary, the beneficial technical effects of this utility model are as follows: The paint container filter nozzle, through its reasonable structural design, solves the problem of difficult filter screen cleaning and ensures filtration efficiency, while also avoiding the problem of decreased filtration quality due to loose filter screens, effectively improving the overall quality and efficiency of paint container packaging. Furthermore, its relatively simple structure makes it easy to manufacture and maintain, and it has good application prospects in the field of paint paste packaging. For paint paste packaging of different specifications and requirements, flexible adaptation can be achieved by adjusting the mesh size of the filter screen and the specifications of the fasteners, further expanding the application range of this filter nozzle. Simultaneously, in actual production, the size and material of the filter nozzle can be optimized according to the production scale and site conditions to better meet actual production needs, reduce production costs, and improve the economic benefits of enterprises. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the paint can filter tip of this utility model.

[0027] Figure 2 This is a cross-sectional structural diagram of the paint can filter nozzle of this utility model.

[0028] Figure 3 yes Figure 2 A magnified view of part A in the diagram.

[0029] In the diagram, 1. First housing; 11. Feed pipe; 12. Adjusting pipe; 2. Second housing; 21. Discharge pipe; 3. Fastener; 31. Positioning groove; 32. Gasket; 33. Positioning bolt; 34. Positioning nut; 35. Screw; 36. Hand-tightening nut; 4. Sealing ring; 41. First plastic bracket; 411. First limit terminal; 42. Rubber bracket; 421. Neck; 422. Connecting part; 423. Abutting part; 43. Spring; 44. Adjusting ring; 45. Limiting ring; 46. Second plastic bracket; 461. Second limit terminal; 47. L-shaped retaining ring; 5. Filter screen; 6. Guide surface. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Reference Figure 1This utility model discloses a paint can filter nozzle, comprising a first housing 1 and a second housing 2 with stepped inner walls, multiple fasteners 3 disposed on the first housing 1 and the second housing 2, a feed pipe 11 connected to the first housing 1 and an adjusting pipe 12 with a pipe cap, a sealing ring 4 nested in the opening of the stepped inner wall of the first housing 1, a filter screen 5 embedded in the opening of the stepped inner wall of the second housing 2, and a discharge pipe 21 connected to the second housing 2. The feed end of the feed pipe 11 is connected to a storage tank via a valve, and the axial end face of the sealing ring 4 tightly abuts against the circumferential edge of the filter screen 5.

[0032] During the paint filling process, the feed pipe 11 and the dispensing port of the receiving bag in the storage tank are connected in advance via a valve. After the paint slurry enters the feed pipe 11, it first flows into the first housing 1. Because the sealing ring 4 tightly abuts against the circumferential edge of the filter screen 5, it can effectively prevent the paint slurry from flowing around the filter screen 5 through the gap between the two, ensuring that all paint slurry must be filtered by the filter screen 5. Since the filter screen 5 is embedded in the inner wall opening of the step of the second housing 2, it can effectively intercept impurities in the paint slurry. Paint slurry that meets the fineness requirements will pass through the filter screen 5 and then flow into the plastic bucket through the discharge pipe 21. When the filter screen 5 needs to be clogged, it can be operated through the regulating pipe 12, that is, closing the valve and opening the valve. Opening the pipe cover allows for backwashing of the discharge pipe 21 and regulating pipe 12, enabling large particles that are clogging the filter screen 5 to be removed, making cleaning more convenient and effectively reducing the time and difficulty of cleaning the filter screen 5. This prevents the filter screen 5 from clogging and affecting the flow rate and packaging quality of the paint slurry, thus ensuring the efficiency of the entire paint packaging process. In addition, multiple fasteners 3 installed on the first housing 1 and the second housing 2 ensure the stability of the connection between the first housing 1 and the second housing 2, preventing the filter screen 5 from loosening. Even after long-term use, they can effectively prevent the filter screen 5 from shaking inside the filter nozzle, ensuring the interception effect of smaller particles of impurities in the paint slurry, thereby guaranteeing the filtration quality.

[0033] Reference Figure 2 The end walls of the stepped inner walls of the first housing 1 and the second housing 2 are configured as arc-shaped concave guide surfaces 6. The arc-shaped concave guide surfaces 6 can make the paint slurry flow more smoothly to the filter screen 5 and the discharge pipe 21, reduce the flow resistance of the paint slurry in the first housing 1 and the second housing 2, and avoid the paint slurry from accumulating at the end walls. This helps to improve the flow efficiency of the paint slurry, so that more paint slurry can reach the filter screen 5 for filtration and discharge quickly and evenly.

[0034] Multiple fasteners 3 are evenly distributed along the circumference of the first housing 1. Each fastener 3 includes a positioning groove 31 penetrating the first housing 1 and the second housing 2, a pair of washers 32 disposed on the first housing 1 and symmetrically arranged on both sides of the positioning groove 31, a positioning bolt 33 passing through the pair of washers 32, a positioning nut 34 threaded onto the positioning bolt 33, a screw 35 passing through the positioning groove 31, and a hand-tightening nut 36. One end of the screw 35 is rotatably fitted onto the positioning bolt 33, and the other end is threadedly connected to the hand-tightening nut 36, which tightly abuts against the surface of the second housing 2 opposite to the first housing 1.

[0035] The positioning groove 31 provides a path for the screw 35 to pass through, ensuring the accuracy and stability of the screw 35's installation position. The cooperation of the positioning bolt 33 and the positioning nut 34 allows one end of the screw 35 to be rotatably fitted into it, enabling the screw 35 to rotate flexibly during installation and disassembly, facilitating operation. The threaded connection between the hand-tightening nut 36 and the screw 35 allows workers to manually tighten or loosen it without the need for additional tools, improving the efficiency of installation and disassembly. When the hand-tightening nut 36 is tightened, it tightly abuts against the surface of the second housing 2 away from the first housing 1, from... The first housing 1 and the second housing 2 are tightly connected together. This connection method is not only firm and reliable, but also allows for easy and quick loosening of the hand-tightening nut 36 to separate the first housing 1 and the second housing 2 when cleaning, maintaining, or replacing the filter screen 5 is required, facilitating subsequent work. At the same time, this structural design ensures that the connection between the components of the entire filter remains stable during long-term use, even after multiple installations and disassemblies, without loosening or failure, thus guaranteeing the normal use and filtration effect of the filter during the paint container filling process.

[0036] Reference Figure 3The sealing ring 4 includes a first plastic bracket 41, a rubber bracket 42, a spring 43, an adjusting ring 44, a limiting ring 45, and a second plastic bracket 46. The first plastic bracket 41 and the second plastic bracket 46 have approximately U-shaped cross-sections and are symmetrically arranged. The first plastic bracket 41 is tightly nested in sequence on the stepped inner wall of the first housing 1 and the rubber bracket 42. The rubber bracket 42 includes a V-shaped neck 421, connecting portions 422 symmetrically arranged on both sides of the neck 421, and an abutment portion 423 disposed on one of the connecting portions 422. The circumferential inner wall of the neck 421 tightly abuts against the U-shaped inner wall of the first plastic bracket 41, the abutment portion 423 tightly abuts against the U-shaped inner wall of the first plastic bracket 41, and the other connecting portion 422 tightly abuts against the axial end face of the adjusting ring 44. One end of the first plastic bracket 41 bends outward and extends to form a first limiting terminal 411. A limiting terminal 411 is arranged opposite the axial end face of the neck 421; a spring 43 is sleeved on the rubber bracket 42; the cross-section of the adjusting ring 44 is T-shaped, and the inner wall of the other connecting part 422 tightly abuts against the T-shaped outer wall of the adjusting ring 44; the two axial end faces of the limiting ring 45 tightly abut against the axial end face of the adjusting ring 44 and the U-shaped inner wall of the second plastic bracket 46 respectively, and an L-shaped retaining ring 47 is provided between the limiting ring 45 and the second plastic bracket 46; the second plastic bracket 46 is tightly sleeved on the limiting ring 45 and tightly nested on the first plastic bracket 41, one end of the second plastic bracket 46 is bent outward and extends to form a second limiting terminal 461, and the second limiting terminal 461 is arranged opposite the axial end face of the first plastic bracket 41.

[0037] The first plastic bracket 41 and the second plastic bracket 46 are symmetrically arranged and have an approximately U-shaped cross-section. The first plastic bracket 41 is tightly nested within the stepped inner wall of the first housing 1 and the rubber bracket 42. This shape not only provides stable support and installation space for other components but also ensures a tight connection between the sealing ring 4 and the first housing 1, preventing paint leakage from the connection point during container loading. The two ends of the rubber bracket 42 are respectively tightly abutted against the U-shaped inner wall of the first plastic bracket 41 and the axial end face of the adjusting ring 44. A spring 43 is fitted onto the rubber bracket 42, and the elasticity of the spring 43 ensures that the rubber bracket 42 remains in a tight fit, further enhancing the sealing effect. When pressure changes occur during the paint filling process, spring 43 acts as a buffer and adjuster, ensuring that sealing ring 4 can work stably under different pressure environments. The two axial end faces of limiting ring 45 tightly abut against the axial end face of adjusting ring 44 and the U-shaped inner wall of second plastic bracket 46, respectively. The second plastic bracket 46 is tightly fitted onto limiting ring 45 and nested on first plastic bracket 41. This layered nesting and tight abutment structure effectively prevents relative displacement between components, ensuring the overall stability of sealing ring 4. Even during long-term use, it can avoid sealing failure caused by loosening of components. In addition, this type of sealing ring 4 is easy to install and remove. When it is necessary to clean, maintain or replace filter screen 5, sealing ring 4 can be easily removed from first housing 1 and quickly and accurately reinstalled after the operation, without affecting the normal use and filtration effect of filter screen. At the same time, this design also reduces the risk of damage to sealing ring 4, increases its service life, and thus reduces operating costs.

[0038] Furthermore, the unique V-shaped neck 421 design of the rubber bracket 42 allows it to fit tightly against the U-shaped inner wall of the first plastic bracket 41. This fit not only increases the contact area but also effectively prevents the paint from leaking from the connection point during the filling process. Simultaneously, the symmetrically arranged connecting parts 422, one of which tightly abuts against the axial end face of the adjusting ring 44, and the other through the abutment part 423, tightly contact the U-shaped inner wall of the first plastic bracket 41, forming a closed sealing space and further enhancing the sealing effect. During the paint filling process, when the pressure of the paint changes, the V-shaped neck 421 provides a certain elastic buffering effect, allowing it to deform appropriately according to the pressure, thus ensuring that the rubber bracket 42, the first plastic bracket 41, and the adjusting ring 44 always maintain a tight connection, avoiding seal failure due to pressure changes.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A filter tip for paint drum packaging, characterized in that: The device includes a first housing (1) and a second housing (2) with stepped inner walls, a plurality of fasteners (3) disposed on the first housing (1) and the second housing (2), a feed pipe (11) disposed on the first housing (1) and an adjusting pipe (12) with a pipe cap, a sealing ring (4) nested on the opening of the stepped inner wall of the first housing (1), a filter screen (5) embedded on the opening of the stepped inner wall of the second housing (2), and a discharge pipe (21) disposed on the second housing (2). The feed end of the feed pipe (11) is used to connect to the storage tank through a valve, and the axial end face of the sealing ring (4) closely abuts against the circumferential edge of the filter screen (5).

2. The paint drum filter tip according to claim 1, characterized in that: The end walls of the inner walls of the steps of the first shell (1) and the second shell (2) are configured as arc-shaped concave guide surfaces (6).

3. A paint drum filter tip according to claim 1, characterized in that: The fasteners (3) are evenly distributed along the circumference of the first housing (1).

4. A paint drum filter tip according to claim 1, characterized in that: The fastener (3) includes a positioning groove (31) through the first housing (1) and the second housing (2), a pair of gaskets (32) disposed on the first housing (1) and symmetrically arranged on both sides of the positioning groove (31), a positioning bolt (33) through the pair of gaskets (32), a positioning nut (34) threaded to the positioning bolt (33), a screw (35) through the positioning groove (31), and a hand-tightening nut (36). One end of the screw (35) is rotatably sleeved on the positioning bolt (33), and the other end is threadedly connected to the hand-tightening nut (36). The hand-tightening nut (36) tightly abuts against the surface of the second housing (2) away from the first housing (1).

5. A paint drum filter tip according to claim 1, characterized in that: The sealing ring (4) includes a first plastic bracket (41), a rubber bracket (42), a spring (43), an adjusting ring (44), a limiting ring (45), and a second plastic bracket (46). The cross-sections of the first plastic bracket (41) and the second plastic bracket (46) are approximately U-shaped and arranged symmetrically. The first plastic bracket (41) is tightly nested in sequence on the inner wall of the step of the first housing (1) and the rubber bracket (42). The two ends of the rubber bracket (42) are respectively tightly abutting against the U-shaped inner wall of the first plastic bracket (41) and the axial end face of the adjusting ring (44). The spring (43) is sleeved on the rubber bracket (42). The two axial end faces of the limiting ring (45) are respectively tightly abutting against the axial end face of the adjusting ring (44) and the U-shaped inner wall of the second plastic bracket (46). The second plastic bracket (46) is tightly sleeved on the limiting ring (45) and tightly nested on the first plastic bracket (41).

6. A paint drum filter tip according to claim 5, characterized in that: The rubber bracket (42) includes a V-shaped neck (421), connecting portions (422) symmetrically arranged on both sides of the neck (421), and an abutment portion (423) disposed on one of the connecting portions (422). The circumferential inner wall of the neck (421) tightly abuts against the U-shaped inner wall of the first plastic bracket (41), the abutment portion (423) tightly abuts against the U-shaped inner wall of the first plastic bracket (41), and the other connecting portion (422) tightly abuts against the axial end face of the adjusting ring (44).

7. A paint drum filter tip according to claim 6, characterized in that: One end of the first plastic bracket (41) is bent outward and extends to form a first limiting terminal (411), which is arranged relative to the axial end face of the neck (421).

8. A paint drum filter tip according to claim 6, characterized in that: The cross-section of the adjustment ring (44) is T-shaped, and the inner wall of the other connecting part (422) tightly abuts against the outer wall of the T-shaped adjustment ring (44).

9. A paint drum filter tip according to claim 5, characterized in that: An L-shaped retaining ring (47) is provided between the limiting ring (45) and the second plastic bracket (46).

10. A paint drum filter tip according to claim 5, characterized in that: One end of the second plastic bracket (46) is bent outward and extends to form a second limiting terminal (461), which is arranged relative to the axial end face of the first plastic bracket (41).

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