Fluid supply cup with flexible lining

Abstract

The utility model relates to the field of paint spraying, and discloses a fluid supply cup which is provided with a rigid structure and a flexible lining arranged in the rigid structure, the rigid structure comprises a cup body with a containing cavity and a cup cover covering the opening end of the cup body, and the cup cover is connected to the cup body, the flexible lining and a spray gun. The cup further comprises a ventilation structure arranged on the cup body or the cup cover, the ventilation structure is provided with a first through hole communicated with the inner space and the outer space of the rigid structure and a ventilation cavity with one end connected to the cup wall of the rigid structure, and a one-way sealing structure is arranged in the ventilation cavity. The one-way sealing structure is provided with a sealing end matched with the first through hole and a pressure element providing reverse pressure for the sealing end, and the ventilation structure pushes the sealing end to be away from the first through hole to achieve ventilation through forward pressure generated at the sealing end by the pressure difference between the two ends of the one-way sealing structure. The fluid supply cup has the advantages of being capable of effectively preventing impurities from entering the spray cup and damaging the flexible lining, good in sealing effect and convenient to open.

Description

Technical Field

[0001] The utility model relates to the field of paint spraying, in particular to a fluid supply cup with a flexible lining. Background Art

[0002] Spray guns are widely used in life as a spraying tool. Currently common spray guns usually use the gas introduced into the spray gun to atomize the paint and spray the paint onto the surface to be treated. At the same time, the spray gun often needs to be moved at any time during use, so the paint supply container used with the spray gun generally adopts a rigid cup, and the supply cup can be directly installed at the paint injection port of the spray gun. Existing spray guns generally install the paint supply cup to the top of the spray gun, and cooperate with the gas flowing through the internal air path of the spray gun and the weight of the paint to realize the dynamic process of feeding the paint into the spray gun and atomizing and spraying it at the nozzle. However, the solution of using a rigid container as a supply cup often causes the internal and external pressure difference to gradually increase during use, making it difficult for the paint to flow out.

[0003] The existing supply cup has a collapsible lining inside the rigid outer cover to hold the paint. When the paint flows out, the lining is squeezed and collapsed to ensure that the paint can continue to flow out. However, the collapse of the flexible lining inside the rigid outer cup also requires a ventilation structure. The existing inner and outer cup designs often have windows on the outer cup for ventilation to allow the lining to collapse when the paint in the lining is reduced, thereby ensuring that the paint flows out smoothly. However, in actual operation, debris often enters the cup through the window. In the environment where the spray gun is used, such as various factories, there are often sharp objects that can easily cut the flexible lining and are difficult to clean after entering. Therefore, it is necessary to improve the existing paint spray cup to prevent impurities from entering the cup while balancing the air pressure inside and outside the cup. Utility Model Content

[0004] The utility model aims to overcome the problem in the prior art that impurities easily enter the flexible lining of the paint supply cup during use and to provide a fluid supply cup which has the advantages of being able to maintain internal and external air pressure balance and having high reliability.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a fluid supply cup with a flexible lining, which has a rigid structure and a flexible lining arranged in the rigid structure, the rigid structure includes a cup body with a accommodating cavity, a cup cover covering the open end of the cup body, the cup cover is respectively connected to the cup body, the flexible lining and the spray gun, and also includes a ventilation structure arranged on the cup body or the cup cover, the ventilation structure has a first through hole connecting the inner and outer spaces of the rigid structure and a ventilation cavity with one end connected to the cup wall of the rigid structure, a one-way sealing structure is arranged inside the ventilation cavity, the one-way sealing structure has a sealing end adapted to the first through hole and a pressure element that provides reverse pressure to the sealing end, the ventilation structure pushes the sealing end away from the first through hole to achieve ventilation through the positive pressure generated at the sealing end by the pressure difference at both ends of the one-way sealing structure, wherein when the one-way sealing structure is opened, the gas inflow direction from the ventilation structure is positive.

[0006] Preferably, two ends of the pressure element are respectively fixed to the inside of the ventilation cavity and the sealing end, and the pressure element is an elastic and retractable product.

[0007] Preferably, one end of the ventilation cavity away from the first through hole is set as a connecting end, a second through hole is set on the connecting end, one end of the pressure element is fixed to the connecting end, and the diameter of the pressure element is larger than the diameter of the second through hole.

[0008] Preferably, the ventilation cavity is connected to the inner surface of the rigid structure, and the first through hole is directly arranged on the rigid structure.

[0009] Preferably, the sealing end comprises a sealing end body fixedly connected to the pressure element and a step portion protruding from the sealing end body, and the size of the step portion is adapted to the size of the first through hole.

[0010] Preferably, the ventilation cavity is provided with a sealing gasket matched with the sealing end body at one end close to the first through hole.

[0011] Preferably, the ventilation cavity is connected to the outer surface of the rigid structure, and the first through hole is arranged at an end of the ventilation cavity away from the connecting end.

[0012] Preferably, the communication end is directly connected to the rigid structure, and the second through hole passes through the rigid structure.

[0013] Preferably, the sealing end has a sealing section body fixedly connected to the pressure element and a step portion protruding from the sealing end body, the size of the step portion is adapted to the size of the first through hole, and the ventilation cavity is provided with a sealing gasket adapted to the sealing end body at one end close to the first through hole.

[0014] Preferably, the cup cover has a first connection feature connected to the open end of the cup body and a second connection feature connected to the spray gun.

[0015] Through the above technical solution, the pressure element and the weight of the paint itself are used to ensure that the sealing end seals the first through hole to prevent paint leakage. When the spray gun is working, the air pressure inside and outside the paint supply cup is unbalanced, and the positive pressure generated at the sealing end by the pressure difference at both ends of the one-way sealing structure pushes the sealing end away from the first through hole to achieve ventilation. The fluid supply cup involved in the utility model has the following advantages:

[0016] 1. It can effectively prevent impurities from entering the spray cup and damaging the flexible lining.

[0017] 2. Good sealing effect, can effectively prevent paint leakage. The paint is placed in the flexible lining, which is directly connected to the cup cover, and an outer cup is also provided on the outside, which can effectively prevent paint leakage.

[0018] 3. It can effectively prevent paint from splashing. The ventilation structure does not directly contact the paint, and will not cause paint to splash out of the ventilation structure when it is opened.

[0019] 4. Easy to open. The opening conditions of the one-way sealing structure can be changed by adjusting the parameters of the pressure element. When the viscosity coefficient of the paint or other coatings is high, the pressure element with a smaller elastic coefficient can be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the fluid supply cup involved in the utility model;

[0021] Figure 2 is a cross-sectional view along the AA direction in the first preferred embodiment;

[0022] Figure 3 It is an enlarged view of the structure at position I in the first embodiment;

[0023] Figure 4 It is an overall structural assembly diagram under the first implementation mode;

[0024] Figure 5 A cross-sectional view along the AA direction of the second preferred embodiment;

[0025] Figure 6 It is an enlarged view of the structure at position I in the second embodiment;

[0026] Figure 7 It is an overall structural assembly diagram under the second implementation mode.

[0027] Description of Reference Numerals

[0028] 1. Cup body; 2. Cup cover; 3. First through hole; 4. Ventilation cavity; 41. Second through hole; 5. One-way sealing structure; 51. Sealing end; 52. Pressure element; 6. Sealing gasket; 7. Flexible lining. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0030] In the present utility model, unless otherwise specified, directional words such as "up, down, left, right" generally refer to up, down, left, right shown in the reference drawings, "inside, outside" refer to the inside and outside relative to the outline of each component itself, and "far, near" refer to the inside and outside relative to the outline of each component itself.

[0031] In view of the fact that the pressure inside and outside the existing paint supply cup is unbalanced when the paint is reduced during use, a paint supply cup with a ventilation structure is provided to allow fluid to enter the cup and effectively prevent solid impurities from entering the cup. Figures 1 to 7 As shown, the fluid supply cup involved in the utility model has a rigid structure and a flexible lining 7 arranged in the rigid structure, the rigid structure includes a cup body 1 with a accommodating cavity, a cup cover 2 covering the open end of the cup body 1, and a ventilation structure arranged on the cup body 1 or the cup cover 2, the ventilation structure has a first through hole 3 connecting the inner and outer spaces of the rigid structure and a ventilation cavity 4 connected to the cup wall of the rigid structure at one end, a one-way sealing structure 5 is arranged inside the ventilation cavity 4, the one-way sealing structure 5 has a sealing end 51 adapted to the first through hole 3 and a pressure element 52 providing reverse pressure to the sealing end 51, the ventilation structure pushes the sealing end 51 away from the first through hole 3 by the positive pressure generated at the sealing end by the pressure difference at both ends of the one-way sealing structure 5 to achieve ventilation, wherein the inflow direction of the gas from the ventilation structure is positive when the one-way sealing structure 5 is opened. During assembly, the second connection feature of the cup cover is connected to the spray gun, at this time, the cup cover of the fluid supply cup faces downward, and the paint flows out along the liquid outlet of the cup cover. Meanwhile, a vent cavity 4 is formed on the cup body 1 or the cup cover 2, and the first through hole 3 is used to connect the inner and outer spaces of the supply cup. A one-way sealing structure is arranged in the vent cavity 4, and the one-way sealing structure has a sealing end 51 that matches the first through hole 3 and a pressure unit 52 that provides reverse pressure to the sealing end 51. When the fluid supply cup is mounted on the spray gun, the sealing end 51 closes the first through hole 3 under the action of the reverse pressure provided by the fluid pressure unit 52.

[0032] As the paint flows out of the fluid supply cup, the internal and external air pressures become unbalanced. When the positive pressure applied by the external atmospheric pressure to the sealing end 51 is sufficient to push the sealing end away from the first through hole 3, the opening condition is reached and the one-way sealing structure opens. At this time, the gas enters the outer cup of the fluid supply cup, realizing the ventilation function and balancing the air pressure inside and outside the cup, thereby allowing the flexible lining to collapse, so that the paint can continue to flow out from the inside of the fluid supply cup. In the fluid supply cup involved in the utility model, the ventilation cavity 4 can be set on the cup body 1 or on the cup cover 2; the ventilation cavity 4 can be connected to the inner surface of the rigid structure or to the outer surface of the rigid structure, that is, the ventilation cavity can be set inside the fluid supply cup or outside the fluid supply cup. Adjusting the parameters of the pressure element 52 can change the opening condition of the one-way sealing structure.

[0033] In order to provide reverse pressure to the sealing end 51, the two ends of the pressure element 52 are respectively fixed to the inside of the ventilation cavity 4 and the sealing end 51. The pressure element 52 is an elastic and retractable product. The pressure element is preferably a spring. When the pressure element 52 is compressed, reverse pressure can be provided to the sealing end 51. Adjusting the parameters of the pressure element 52 can change the opening conditions of the one-way sealing structure.

[0034] Furthermore, in order to provide reverse pressure to the sealing end 51 while allowing the paint to flow into the ventilation cavity 4, one end of the ventilation cavity 4 away from the first through hole 3 is set as a communication end, and the communication end is provided with a second through hole 41, and one end of the pressure element 52 is fixed to the communication end, and the diameter of the pressure element 52 is larger than the diameter of the second through hole 41. When the fluid supply cup is mounted on the spray gun, the paint flows into the ventilation cavity 4 through the second through hole 41, and since the sealing end 51 closes the first through hole 3, the paint squeezes the sealing end 51 and does not flow out of the first through hole 3.

[0035] Refer to 2 to Figure 4 As shown, in a preferred embodiment, the ventilation cavity 4 is connected to the inner surface of the rigid structure, the ventilation structure is arranged inside the fluid supply cup, and the first through hole 3 is directly arranged on the rigid structure. When the sealing end 51 is detached from the first through hole 3, the gas overcomes the pressure element 52 and directly enters the ventilation cavity 4 and then flows into the space inside the cup through the second through hole, thereby achieving ventilation to allow the flexible lining 7 to collapse.

[0036] In order to further improve the sealing effect of the one-way sealing structure in a static environment, the sealing end 51 has a sealing end body fixedly connected to the pressure element 52 and a step portion protruding from the sealing end body, and the size of the step portion is adapted to the size of the first through hole 3. The step portion and the pressure element 52 are respectively located on both sides of the sealing end body, and the step portion can be columnar or conical. When the step portion is conical, the shape of the first through hole 3 also changes accordingly. At this time, the step portion does not need to completely leave the first through hole 3 to achieve ventilation. When the step portion is columnar, the step portion must completely leave the first through hole to allow gas to pass through. The ventilation cavity 4 is provided with a sealing gasket 6 adapted to the sealing end body at one end close to the first through hole 3. When the one-way sealing structure 5 closes the ventilation cavity 4, the sealing end body 51 is tightly matched with the sealing gasket.

[0037] Reference Figures 5 to 7 As shown, in another preferred embodiment, the ventilation cavity 4 is connected to the outer surface of the rigid structure, and the first through hole 3 is arranged at one end of the ventilation cavity 4 away from the connecting end. When the sealing end 51 is separated from the first through hole 3, the gas overcomes the pressure provided by the pressure element 52 and directly enters the ventilation cavity 4 and then flows into the space inside the cup through the second through hole to achieve ventilation. The connecting end is directly connected to the rigid structure, and the second through hole 41 runs through the rigid structure.

[0038] The sealing end 51 has a sealing end body fixedly connected to the pressure element 52 and a step portion protruding from the sealing end body, and the size of the step portion is adapted to the size of the first through hole 3. The step portion and the pressure element 52 are respectively located on both sides of the sealing end body, and the step portion can be columnar or conical. When the step portion is conical, the shape of the first through hole 3 also changes accordingly. At this time, the step portion does not need to completely leave the first through hole 3 to achieve ventilation. When the step portion is columnar, the step portion must completely leave the first through hole to allow gas to pass through. The ventilation cavity 4 is provided with a sealing gasket 6 adapted to the sealing end body at one end close to the first through hole 3. When the one-way sealing structure 5 closes the ventilation cavity 4, the sealing end body 51 is tightly matched with the sealing gasket.

[0039] To facilitate assembly, the cup cover 2 has a first connection feature connected to the open end of the cup body 1 and a second connection feature connected to the spray gun.

[0040] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A fluid supply cup with a flexible liner, the fluid supply cup having a rigid structure and a flexible liner (7) arranged in the rigid structure, the rigid structure comprising a cup body (1) having a receiving cavity, a cup cover (2) covering the open end of the cup body (1), the cup cover (2) being connected to the cup body (1), the flexible liner (7) and the spray gun, respectively, characterized in that: The invention also comprises a ventilation structure arranged on the cup body (1) or the cup cover (2), wherein the ventilation structure comprises a first through hole (3) connecting the inner and outer spaces of the rigid structure and a ventilation cavity (4) connected to the cup wall of the rigid structure at one end, wherein a one-way sealing structure (5) is arranged inside the ventilation cavity (4), wherein the one-way sealing structure (5) comprises a sealing end (51) adapted to the first through hole (3) and a pressure element (52) for providing a reverse pressure to the sealing end (51), wherein the ventilation structure pushes the sealing end (51) away from the first through hole (3) to achieve ventilation through the positive pressure generated at the sealing end by the pressure difference at both ends of the one-way sealing structure (5), wherein when the one-way sealing structure (5) is opened, the gas flows into the ventilation structure in the positive direction.

2. The fluid supply cup according to claim 1, wherein: The two ends of the pressure element (52) are respectively fixed to the inside of the ventilation cavity (4) and the sealing end (51), and the pressure element (52) is an elastic and retractable product.

3. The fluid supply cup according to claim 1, wherein: One end of the ventilation cavity (4) away from the first through hole (3) is arranged as a connecting end, and a second through hole (41) is arranged on the connecting end. One end of the pressure element (52) is fixed to the connecting end, and the diameter of the pressure element (52) is greater than the diameter of the second through hole (41).

4. The fluid supply cup according to claim 3, characterized in that: The ventilation cavity (4) is connected to the inner surface of the rigid structure, and the first through hole (3) is directly arranged on the rigid structure.

5. The fluid supply cup according to claim 4, characterized in that: The sealing end (51) comprises a sealing end body fixedly connected to the pressure element (52) and a step portion protruding from the sealing end body, wherein the size of the step portion is adapted to the size of the first through hole (3).

6. The fluid supply cup according to claim 5, characterized in that The ventilation cavity (4) is provided with a sealing gasket (6) adapted to the sealing end body at one end close to the first through hole (3).

7. The fluid supply cup according to claim 3, wherein: The ventilation cavity (4) is connected to the outer surface of the rigid structure, and the first through hole (3) is arranged at an end of the ventilation cavity (4) away from the connecting end.

8. The fluid supply cup of claim 7, wherein: The communication end is directly connected to the rigid structure, and the second through hole (41) passes through the rigid structure.

9. The fluid supply cup of claim 7, wherein: The sealing end (51) comprises a sealing section body fixedly connected to the pressure element (52) and a step portion protruding from the sealing end body, wherein the size of the step portion is adapted to the size of the first through hole (3), and the ventilation cavity (4) is provided with a sealing gasket (6) adapted to the sealing end body at one end close to the first through hole (3).

10. The fluid supply cup of claim 1, wherein: The cup cover (2) has a first connection feature connected to the open end of the cup body (1) and a second connection feature connected to the spray gun.

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