An automatic liquid supplementing tool and an automatic supply device of anticorrosive paint formed thereby

Abstract

This utility model provides an automatic liquid replenishment fixture and an automatic feeding device for the formed anti-corrosion paint. The automatic liquid replenishment fixture includes a sealed liquid storage tank and an open dipping tank. The bottom of the liquid storage tank is connected to the inlet of the dipping tank via a connecting pipe. The bottom height of the liquid storage tank is greater than the inlet height of the dipping tank. It also includes a connecting air pipe, the first end of which is connected to the air inside the liquid storage tank. When the liquid level in the dipping tank does not reach a first preset height, the second end of the connecting air pipe is connected to the air; when the liquid level in the dipping tank reaches the first preset height, the second end of the connecting air pipe is sealed. This application, through the principle of vacuum negative pressure, ensures a quantitative supply of paint while minimizing the evaporation of solvents in the paint, thus ensuring the performance stability of the paint. It also avoids electrical hazards associated with electrical control.

Description

Technical Field

[0001] This utility model relates to the technical field of automatic liquid replenishment, and in particular to an automatic liquid replenishment tooling and an automatic feeding device for the anti-corrosion paint formed therefrom. Background Technology

[0002] Some existing coating formulations contain volatile solvents, and prolonged exposure to air can affect the performance stability of such coatings. To shorten the exposure time of coatings to air, dip coating is typically used. In dip coating, a small amount of coating is placed in a dip coating tank, and the workpiece is immersed in the tank for coating; this ensures that the workpiece is coated in the shortest possible time.

[0003] Because coatings contain volatile components, the volume of coating poured into the dip-coating tank at a time is relatively small. Ideally, the coating in the tank should be sufficient for a single coating, minimizing the time the coating is exposed to air. However, this method requires regular and frequent replenishment of the dip-coating tank. Existing technologies typically incorporate control components with electrical structures to achieve timed replenishment. However, for conductive coatings such as anti-corrosion paints, electrical control may affect the performance of these coatings, compromising their stability and ultimately impacting the coating effect. Utility Model Content

[0004] To overcome the problems existing in related technologies, one of the objectives of this utility model is to provide an automatic liquid replenishment fixture. Through the principle of vacuum negative pressure, the fixture automatically replenishes the dip coating tank with the help of a storage tank, ensuring that the liquid level in the dip coating tank remains constant. The sealed storage tank can protect the coating and prevent its solvent from evaporating. Thus, while ensuring a quantitative supply of coating, it minimizes the evaporation of solvent in the coating and ensures the performance stability of the coating. It can also avoid the electrical hazards caused by the use of electrical control.

[0005] An automatic liquid replenishing fixture is used to automatically replenish the coating in an immersion coating tank, wherein the coating contains a volatile solvent; the automatic liquid replenishing fixture includes a sealed liquid storage tank and an immersion coating tank with an open opening, the bottom of the liquid storage tank being connected to the liquid inlet of the immersion coating tank via a connecting liquid pipe; the bottom height of the liquid storage tank is greater than the height of the liquid inlet of the immersion coating tank.

[0006] The automatic liquid replenishment fixture also includes a connecting air pipe, the first end of which is connected to the air in the liquid storage tank; when the liquid level in the immersion coating tank does not reach the first preset height, the second end of the connecting air pipe is connected to the air; when the liquid level in the immersion coating tank reaches the first preset height, the second end of the connecting air pipe is blocked.

[0007] This application uses a storage tank to automatically replenish the dip coating tank, ensuring that the liquid level in the dip coating tank remains constant. The sealed storage tank can protect the coating and prevent its solvent from evaporating. Thus, while ensuring a quantitative supply of coating, it minimizes the evaporation of solvent in the coating and ensures the performance stability of the coating. It can also avoid electrical hazards caused by the use of electrical control.

[0008] In a preferred embodiment of this invention, when a negative pressure is formed inside the storage tank and the liquid supply to the immersion coating tank is stopped, the liquid level in the immersion coating tank is taken as the second preset height, and the first preset height is less than the second preset height.

[0009] In practice, the first preset height corresponds to the liquid level in the dipping tank when the second end of the connecting air pipe is blocked; the second preset height corresponds to the liquid level in the dipping tank when pressure is formed inside the storage tank and liquid is no longer supplied to the dipping tank. When the second end of the connecting air pipe is first blocked, the air pressure at the top of the storage tank is slightly less than atmospheric pressure. At this time, it is not enough to overcome the gravity of the coating, so some coating still flows from the storage tank into the dipping tank. As the coating flows from the storage tank into the dipping tank, the air pressure at the top of the storage tank gradually decreases until a vacuum negative pressure is formed that can overcome the gravity of the coating. At this time, the storage tank and the dipping tank reach a state of equilibrium, and the coating no longer flows out of the storage tank.

[0010] In a preferred embodiment of this invention, the second end of the connecting air pipe is located inside the dip coating tank; when the liquid level in the dip coating tank does not reach the first preset height, the second end of the connecting air pipe is connected to the air at the top of the dip coating tank; when the liquid level in the dip coating tank reaches the first preset height, the second end of the connecting air pipe abuts against the coating material in the dip coating tank.

[0011] In this embodiment, the second end of the connecting air pipe is located inside the dip coating tank, and its height relative to the bottom of the tank is equal to a first preset height but less than a second preset height. The second preset height refers to the liquid level in the dip coating tank when a negative pressure is formed inside the storage tank, ceasing liquid supply to the tank. When the liquid level in the tank rises to the first preset height, the second end of the connecting air pipe is sealed by the coating material within the tank. At this point, the air pressure at the top of the storage tank is slightly less than atmospheric pressure, insufficient to overcome the gravity of the coating material. Therefore, some coating material continues to flow from the storage tank into the dip coating tank. As the coating material flows from the storage tank into the tank, the air pressure at the top of the storage tank gradually decreases until a vacuum negative pressure is formed that can overcome the gravity of the coating material. At this point, the liquid level in the tank rises to the second preset height, and the storage tank and the dip coating tank reach a balanced state, preventing the coating material from flowing out of the storage tank. By sealing the second end of the connecting air pipe with the coating material in the tank, no additional sealing components are required. This method is simple in structure, convenient in operation, and simplifies the overall structure of the automatic liquid replenishment fixture.

[0012] In a preferred embodiment of this invention, a buoyancy element is provided on the surface of the coating liquid in the dip coating tank. When the liquid level in the dip coating tank has not reached the first preset height, the second end of the connecting air pipe is connected to the air at the top of the dip coating tank. When the liquid level in the dip coating tank reaches the first preset height, the second end of the connecting air pipe abuts against the buoyancy element.

[0013] In this embodiment, the second end of the connecting air pipe is located inside the dip coating tank, and a buoyancy component is provided on the liquid surface in the dip coating tank. The buoyancy component occupies a small area on the liquid surface, and a limiting component can be provided on its side to ensure that the buoyancy component is always directly facing the second end of the connecting air pipe as the liquid level in the dip coating tank rises and falls. When the liquid level in the dip coating tank rises to a first preset height, the second end of the connecting air pipe is blocked by the buoyancy component. At this time, the air pressure at the top of the storage tank is slightly less than atmospheric pressure, which is insufficient to overcome the gravity of the coating. Therefore, some coating still flows from the storage tank into the dip coating tank. As the coating flows from the storage tank into the dip coating tank, the air pressure at the top of the storage tank gradually decreases until a vacuum negative pressure is formed that can overcome the gravity of the coating. At this time, the liquid level in the dip coating tank rises to a second preset height, and the storage tank and the dip coating tank reach a balanced state, and the coating no longer flows out of the storage tank. By using the buoyancy component in the dip coating tank to liquid seal the second end of the connecting air pipe, the structure is simple, the operation is convenient, and the overall structure of the automatic liquid replenishment tool can be simplified.

[0014] In a preferred embodiment of this invention, a liquid level sensor is provided on the inner wall of the dip coating tank, and a control valve is provided in the connecting air pipe. The liquid level sensor is communicatively connected to the control valve. When the liquid level in the dip coating tank does not reach the first preset height, the second end of the connecting air pipe is connected to the air, and the control valve is opened. When the liquid level sensor detects that the liquid level in the dip coating tank has reached the first preset height, the control valve is closed.

[0015] In this embodiment, the second end of the connecting air pipe is located outside the dip coating tank, and a liquid level sensor is installed at a first preset height position inside the dip coating tank. When the liquid level in the dip coating tank rises to the first preset height, the control valve in the connecting air pipe closes, sealing the second end of the connecting air pipe. At this time, the air pressure at the top of the storage tank is slightly less than atmospheric pressure, which is insufficient to overcome the gravity of the coating. Therefore, some coating still flows from the storage tank into the dip coating tank. As the coating flows from the storage tank into the dip coating tank, the air pressure at the top of the storage tank gradually decreases until a vacuum negative pressure is formed that can overcome the gravity of the coating. At this time, the liquid level in the dip coating tank rises to the second preset height, and the storage tank and the dip coating tank reach a balanced state, and the coating no longer flows out of the storage tank. The second end of the connecting air pipe is liquid-sealed by the buoyancy component in the dip coating tank. The structure is simple and easy to operate, which simplifies the overall structure of the automatic liquid replenishment tool.

[0016] In a preferred embodiment of this invention, the top of the liquid storage tank is provided with a liquid inlet, and a sealing cap is provided in the liquid inlet.

[0017] When replenishment of the storage tank is needed, open the sealing cap to add liquid. When no replenishment is required, the sealing cap covers the inlet, creating a sealed chamber inside the storage tank. The design of the inlet and sealing cap ensures both the formation of a sealed chamber inside the storage tank and timely replenishment, guaranteeing a continuous and stable supply of liquid to the dipping tank.

[0018] In a preferred embodiment of this invention, a first valve is provided in the connecting air pipe.

[0019] When the storage tank stops supplying liquid to the dipping tank, for example when the automatic liquid replenishment tool needs to be repaired or replaced, or when the paint in the storage tank needs to be replaced, the first valve can be closed to prevent negative pressure from forming in the storage tank and affecting the feeding or discharging operations inside the storage tank.

[0020] In a preferred embodiment of this invention, a second valve is provided in the connecting liquid pipe.

[0021] When the storage tank stops supplying liquid to the dipping tank, for example when the automatic liquid replenishment tool needs to be repaired or replaced, or when the paint in the storage tank needs to be replaced, the second valve can be closed to prevent negative pressure from forming in the storage tank and affecting the feeding or discharging operations inside the storage tank.

[0022] In a preferred embodiment of this invention, a drain valve is provided at the bottom of the immersion tank.

[0023] When the coating material in the dip coating tank needs to be drained, open the drain valve to allow the coating material to be completely drained. The drain valve is designed to facilitate the timely removal of coating material from the dip coating tank.

[0024] The second objective of this application is to provide an automatic feeding device for anti-corrosion paint, including an automatic liquid replenishment fixture as described above.

[0025] The beneficial effects of this utility model are as follows:

[0026] This utility model provides an automatic liquid replenishment fixture for automatically replenishing the coating in an immersion coating tank, wherein the coating contains volatile solvents. The automatic liquid replenishment fixture includes a sealed storage tank and an immersion coating tank with an open opening. The inside of the storage tank is a sealed chamber, so the coating stored in the storage tank will not evaporate. The immersion coating tank is used to hold the coating being used, and therefore it is open to facilitate the coating operation. In this application, the bottom of the storage tank is connected to the inlet of the immersion coating tank via a connecting pipe. The bottom height of the storage tank is greater than the inlet height of the immersion coating tank, so that the coating in the storage tank enters the immersion coating tank under the action of gravity. Meanwhile, in this application, the first end of the connecting air pipe is connected to the air inside the storage tank; when the liquid level in the dip coating tank does not reach the first preset height, the second end of the connecting air pipe is connected to the air. At this time, the air at the top of the storage tank is connected to the atmosphere, allowing the paint in the storage tank to enter the dip coating tank under gravity; when the liquid level in the dip coating tank reaches the first preset height, the second end of the connecting air pipe is blocked. As the paint in the storage tank enters the dip coating tank through the connecting pipe, the pressure at the top of the storage tank decreases until a negative pressure is formed, preventing the paint in the storage tank from entering the dip coating tank, thus keeping the paint volume in the dip coating tank constant. This application automatically replenishes the dip coating tank through the storage tank, ensuring that the liquid level in the dip coating tank remains constant. The sealed storage tank can protect the paint and prevent its solvent from evaporating. Thus, while ensuring a quantitative supply of paint, it minimizes the evaporation of solvents in the paint, ensuring the performance stability of the paint; it also avoids electrical hazards caused by the use of electrical control.

[0027] This application also provides an automatic feeding device for anti-corrosion paint, comprising an automatic liquid replenishing fixture as described above. The device automatically replenishes the dipping tank through a storage tank, ensuring that the liquid level in the dipping tank remains constant. The sealed storage tank protects the anti-corrosion paint and prevents solvent evaporation. Thus, while ensuring a quantitative supply of anti-corrosion paint, it minimizes the evaporation of solvents in the anti-corrosion paint, ensuring the performance stability of the anti-corrosion paint. It also avoids electrical hazards caused by the use of electrical control. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the automatic liquid replenishment fixture in Example 2;

[0029] Figure 2 This is a schematic diagram of the automatic liquid replenishment fixture in Example 3;

[0030] Figure 3 This is a schematic diagram of the automatic liquid replenishment fixture in Example 4;

[0031] Figure label:

[0032] 1. Frame; 2. Connecting liquid pipe; 3. Liquid storage tank; 4. Liquid inlet; 5. Sealing cap; 6. First valve; 7. Connecting air pipe; 71. First end of connecting air pipe; 72. Second end of connecting air pipe; 8. Second valve; 10. Dipping tank; 11. Drain valve; 12. Buoyancy component; 13. Liquid level sensor; 14. Control valve. Detailed Implementation

[0033] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0034] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0035] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] Example 1

[0037] like Figures 1-3 As shown, this application provides an automatic liquid replenishment fixture for automatically replenishing the coating in an immersion coating tank 10, wherein the coating contains a volatile solvent; it includes a sealed storage tank 3 and an immersion coating tank 10 with an open opening, the bottom of the storage tank 3 being connected to the inlet 4 of the immersion coating tank 10 via a connecting liquid pipe 2; the bottom height of the storage tank 3 is greater than the height of the inlet 4 of the immersion coating tank 10;

[0038] It also includes a connecting air pipe 7, the first end 71 of which is connected to the air in the liquid storage tank 3; when the liquid level in the dip coating tank 10 does not reach the first preset height, the second end 72 of the connecting air pipe is connected to the air; when the liquid level in the dip coating tank 10 reaches the first preset height, the second end 72 of the connecting air pipe is blocked.

[0039] In this embodiment, the dip coating tank 10 is open, meaning the coating material inside is exposed to the air. The workpiece to be coated is placed directly into the dip coating tank 10 for coating. In this application, the storage tank 3 has a sealed chamber inside. Specifically, the storage tank 3 may have an inlet 4 and a sealing cap 5, with the sealing cap 5 covering the inlet 4. When replenishment of the storage tank 3 is needed, the sealing cap 5 is opened to replenish the storage tank 3. When replenishment is not needed, the sealing cap 5 covers the inlet 4, thus forming a sealed chamber inside the storage tank 3.

[0040] In this application, the volume of coating material contained in the dip coating tank 10 is relatively small, only enough to wet the workpiece in a single application, thus avoiding long-term exposure of the coating material in the dip coating tank 10 to air, which could lead to unstable performance due to solvent evaporation. In this application, the volume of coating material contained in the storage tank 3 is relatively large, ensuring a stable supply of coating material to the dip coating tank 10 over a longer period of time, avoiding the need for frequent replenishment of the storage tank 3.

[0041] The reason for forming a sealed chamber in this application is to ensure that after the second end 72 of the connecting air tube is sealed, as the coating in the storage tank 3 enters the dipping tank 10, a negative pressure less than the external atmospheric pressure is formed at the top of the storage tank 3, preventing the coating in the storage tank 3 from continuing to flow out.

[0042] It should be noted that the first preset height in this application is not the liquid level in the dip coating tank 10 when the storage tank 3 stops supplying liquid to the dip coating tank 10. This application defines the second preset height as the liquid level in the dip coating tank 10 when a negative pressure is formed inside the storage tank 3 and liquid supply to the dip coating tank 10 ceases. In actual operation, the first preset height corresponds to the liquid level in the dip coating tank 10 when the second end 72 of the connecting air pipe is blocked; the second preset height corresponds to the liquid level in the dip coating tank 10 when a pressure is formed inside the storage tank 3 and liquid supply to the dip coating tank 10 ceases. When the second end 72 of the connecting pipe is first sealed, the air pressure at the top of the storage tank 3 is slightly less than the atmospheric pressure. At this time, it is not enough to overcome the gravity of the coating. Therefore, some coating still flows from the storage tank 3 into the dipping tank 10. As the coating flows from the storage tank 3 into the dipping tank 10, the air pressure at the top of the storage tank 3 gradually decreases until a vacuum negative pressure is formed that can overcome the gravity of the coating. At this time, the storage tank 3 and the dipping tank 10 reach a state of equilibrium, and the coating no longer flows out of the storage tank 3.

[0043] Therefore, when the liquid level in the dip coating tank 10 reaches the first preset height, some of the coating in the storage tank 3 can still flow into the dip coating tank 10 until the air pressure at the top of the storage tank 3 reaches a vacuum negative pressure that can overcome the gravity of the coating, that is, when the liquid level in the dip coating tank 10 reaches the second preset height, the storage tank 3 and the dip coating tank 10 reach a balanced state, and the coating no longer flows out of the storage tank 3.

[0044] In this application, the second end 72 of the air pipe is blocked, which can refer to being blocked by the liquid surface inside the dipping tank 10 or by other components outside the dipping tank 10, as long as the blocking purpose is achieved. As long as the second end 72 of the air pipe is blocked, as the coating flows from the storage tank 3 into the dipping tank 10, the air pressure at the top of the storage tank 3 gradually decreases until a vacuum negative pressure is formed that can overcome the gravity of the coating.

[0045] The automatic liquid replenishment fixture in this application also includes a frame 1, a liquid storage tank 3 and an immersion coating tank 10 located at different heights of the frame 1.

[0046] The automatic replenishing fixture provided in this application is used to automatically replenish the coating in the dip coating tank 10, and the coating contains volatile solvents. The automatic replenishing fixture includes a sealed storage tank 3 and an open dip coating tank 10. The storage tank 3 has a sealed chamber inside, so the coating stored in the storage tank 3 will not evaporate. The dip coating tank 10 is used to hold the coating being used, so it is open to facilitate coating operations. In this application, the bottom of the storage tank 3 is connected to the inlet 4 of the dip coating tank 10 via a connecting pipe 2. The bottom height of the storage tank 3 is greater than the height of the inlet 4 of the dip coating tank 10, so that the coating in the storage tank 3 enters the dip coating tank 10 under the action of gravity. Meanwhile, this application... The first end 71 of the connecting air pipe is connected to the air inside the storage tank 3. When the liquid level in the dipping tank 10 has not reached the first preset height, the second end 72 of the connecting air pipe is connected to the air. At this time, the air at the top of the storage tank 3 is connected to the atmosphere, allowing the paint in the storage tank 3 to enter the dipping tank 10 under the action of gravity. When the liquid level in the dipping tank 10 reaches the first preset height, the second end 72 of the connecting air pipe is blocked. As the paint in the storage tank 3 enters the dipping tank 10 through the connecting liquid pipe 2, the pressure at the top of the storage tank 3 decreases until a negative pressure is formed, which prevents the paint in the storage tank 3 from entering the dipping tank 10, so that the volume of paint in the dipping tank 10 remains constant. This application uses a storage tank 3 to automatically replenish the liquid in the dip coating tank 10, ensuring that the liquid level in the dip coating tank 10 remains constant. The sealed storage tank 3 can protect the coating and prevent its solvent from evaporating. Thus, while ensuring a quantitative supply of coating, it minimizes the evaporation of solvent in the coating and ensures the performance stability of the coating. It can also avoid electrical hazards caused by the use of electrical control.

[0047] Example 2

[0048] like Figure 1 As shown, this application provides an automatic liquid replenishment fixture for automatically replenishing the coating in an immersion coating tank 10, wherein the coating contains a volatile solvent; it includes a sealed storage tank 3 and an immersion coating tank 10 with an open opening, the bottom of the storage tank 3 being connected to the inlet 4 of the immersion coating tank 10 via a connecting liquid pipe 2; the bottom height of the storage tank 3 is greater than the height of the inlet 4 of the immersion coating tank 10;

[0049] It also includes a connecting air pipe 7, the first end 71 of which is connected to the air in the liquid storage tank 3; when the liquid level in the dip coating tank 10 does not reach the first preset height, the second end 72 of the connecting air pipe is connected to the air; when the liquid level in the dip coating tank 10 reaches the first preset height, the second end 72 of the connecting air pipe is blocked.

[0050] Furthermore, the second end 72 of the connecting air pipe is located inside the dip coating tank 10; when the liquid level in the dip coating tank 10 has not reached the first preset height, the second end 72 of the connecting air pipe is connected to the air at the top of the dip coating tank 10; when the liquid level in the dip coating tank 10 reaches the first preset height, the second end 72 of the connecting air pipe abuts against the coating material in the dip coating tank 10.

[0051] In this embodiment, the second end 72 of the connecting air pipe is located inside the dip coating tank 10, and relative to the bottom of the dip coating tank 10, the height of the second end 72 of the connecting air pipe is equal to the first preset height and less than the second preset height. The second preset height refers to the liquid level in the dip coating tank 10 when the liquid storage tank 3 forms a negative pressure and no longer supplies liquid to the dip coating tank 10. When the liquid level in the dip coating tank 10 rises to the first preset height, the second end 72 of the connecting air pipe is sealed by the paint liquid in the dip coating tank 10. At this time, the air pressure at the top of the liquid storage tank 3 is slightly less than the atmospheric pressure, which is not enough to overcome the gravity of the paint. Therefore, some paint still flows from the liquid storage tank 3 into the dip coating tank 10. As the paint flows from the liquid storage tank 3 into the dip coating tank 10, the air pressure at the top of the liquid storage tank 3 gradually decreases until a vacuum negative pressure that can overcome the gravity of the paint is formed. At this time, the liquid level in the dip coating tank 10 rises to the second preset height, and the liquid storage tank 3 and the dip coating tank 10 reach a balanced state, and the paint no longer flows out of the liquid storage tank 3. The second end 72 of the connecting air pipe is liquid-sealed by the coating in the dip coating tank 10, without the need for additional sealing parts. The structure is simple and the operation is convenient, which can simplify the overall structure of the automatic liquid replenishment tool.

[0052] In this embodiment, the top of the liquid storage tank 3 is provided with a liquid inlet 4, and a sealing cap 5 is provided in the liquid inlet 4. When it is necessary to replenish the liquid storage tank 3, the sealing cap 5 is opened to replenish the liquid storage tank 3. When it is not necessary to replenish the liquid, the sealing cap 5 covers the liquid inlet 4, so that a sealed chamber is formed inside the liquid storage tank 3. The design of the liquid inlet 4 and the sealing cap 5 can not only ensure that a sealed chamber is formed inside the liquid storage tank 3, but also ensure timely replenishment of the liquid storage tank 3, ensuring that the liquid storage tank 3 can continuously supply liquid to the dipping tank 10, and ensuring the continuous stability of the liquid supply.

[0053] In this embodiment, a first valve 6 is provided in the connecting air pipe 7. When the liquid storage tank 3 no longer supplies liquid to the dipping tank 10, for example, when the automatic liquid replenishment tool needs to be repaired or replaced, or when the coating in the liquid storage tank 3 needs to be replaced, the first valve 6 can be closed to prevent negative pressure from forming in the liquid storage tank 3 and affecting the internal feeding or discharging operations of the liquid storage tank 3.

[0054] In this embodiment, a second valve 8 is provided in the connecting liquid pipe 2. When the storage tank 3 no longer supplies liquid to the dipping tank 10, for example, when the automatic liquid replenishment tool needs to be repaired or replaced, or when the coating in the storage tank 3 needs to be replaced, the second valve 8 can be closed to prevent negative pressure from forming in the storage tank 3 and affecting the feeding or discharging operations inside the storage tank 3.

[0055] In this embodiment, the first valve 6 and the second valve 8 can be used together. They can be closed at the same time to cut off the connection between the storage tank 3 and the dipping tank 10, or opened at the same time to connect the storage tank 3 and the dipping tank 10.

[0056] In this embodiment, a drain valve 11 is provided at the bottom of the dip coating tank 10. When the coating material in the dip coating tank 10 needs to be drained, the drain valve 11 is opened to allow the coating material to be completely drained. The drain valve 11 facilitates the timely discharge of coating material from the dip coating tank 10.

[0057] In the initial state, the drain valve 11 is opened to drain the paint from the dip coating tank 10; the first valve 6 and the second valve 8 are closed, the sealing cap 5 is opened, and paint is added to the storage tank 3 through the inlet 4; then the sealing cap 5 is placed over the inlet 4, forming a sealed chamber inside the storage tank 3. When it is necessary to supply liquid to the dip coating tank 10, the drain valve 11 is closed, the first valve 6 and the second valve 8 are opened, and the bottom of the storage tank 3 is connected to the inlet 4 of the dip coating tank 10 through the connecting liquid pipe 2; the bottom height of the storage tank 3 is greater than the height of the inlet 4 of the dip coating tank 10, the first end 71 of the connecting air pipe is connected to the air inside the storage tank 3, and the second end 72 of the connecting air pipe is located inside the dip coating tank 10; when the liquid level in the dip coating tank 10 does not reach the first preset height, the second end 72 of the connecting air pipe is connected to the air, and the paint in the storage tank 3 enters the dip coating tank 10 through the connecting liquid pipe 2; When the liquid level in the dip coating tank 10 rises to the first preset height, the second end 72 of the connecting air pipe is sealed by the coating liquid in the dip coating tank 10. At this time, the air pressure at the top of the storage tank 3 is slightly less than atmospheric pressure, which is insufficient to overcome the gravity of the coating. Therefore, some coating still flows from the storage tank 3 into the dip coating tank 10. As the coating flows from the storage tank 3 into the dip coating tank 10, the air pressure at the top of the storage tank 3 gradually decreases until a vacuum negative pressure is formed that can overcome the gravity of the coating. At this time, the liquid level in the dip coating tank 10 rises to the second preset height, and the storage tank 3 and the dip coating tank 10 reach a balanced state. The coating no longer flows out of the storage tank 3. This ensures that the storage tank 3 automatically replenishes the dip coating tank 10.

[0058] Example 3

[0059] like Figure 2 As shown, this application provides an automatic liquid replenishment fixture for automatically replenishing the coating in an immersion coating tank 10, wherein the coating contains a volatile solvent; it includes a sealed storage tank 3 and an immersion coating tank 10 with an open opening, the bottom of the storage tank 3 being connected to the inlet 4 of the immersion coating tank 10 via a connecting liquid pipe 2; the bottom height of the storage tank 3 is greater than the height of the inlet 4 of the immersion coating tank 10;

[0060] It also includes a connecting air pipe 7, the first end 71 of which is connected to the air in the liquid storage tank 3; when the liquid level in the dip coating tank 10 does not reach the first preset height, the second end 72 of the connecting air pipe is connected to the air; when the liquid level in the dip coating tank 10 reaches the first preset height, the second end 72 of the connecting air pipe is blocked.

[0061] Furthermore, a buoyancy element 12 is provided on the surface of the coating liquid in the dip coating tank 10. When the liquid level in the dip coating tank 10 has not reached the first preset height, the second end 72 of the connecting air pipe is connected to the air at the top of the dip coating tank 10. When the liquid level in the dip coating tank 10 reaches the first preset height, the second end 72 of the connecting air pipe abuts against the buoyancy element 12.

[0062] In this embodiment, the second end 72 of the connecting air pipe is located inside the dipping tank 10, and a buoyancy member 12 is provided on the liquid surface in the dipping tank 10. The buoyancy member 12 occupies a small area on the liquid surface, and a limiting member can be provided on the side to ensure that the buoyancy member 12 is always directly facing the second end 72 of the connecting air pipe as the liquid level in the dipping tank 10 rises and falls. When the liquid level in the dipping tank 10 rises to the first preset height, the second end 72 of the connecting air pipe is blocked by the buoyancy member 12. At this time, the air pressure at the top of the storage tank 3 is slightly less than the atmospheric pressure, which is not enough to overcome the gravity of the coating. Therefore, some coating still flows from the storage tank 3 into the dipping tank 10. As the coating flows from the storage tank 3 into the dipping tank 10, the air pressure at the top of the storage tank 3 gradually decreases until a vacuum negative pressure that can overcome the gravity of the coating is formed. At this time, the liquid level in the dipping tank 10 rises to the second preset height, and the storage tank 3 and the dipping tank 10 reach a balanced state. The coating no longer flows out of the storage tank 3. The second end 72 of the connecting air pipe is liquid-sealed by the buoyancy component 12 in the dip coating tank 10. The structure is simple and the operation is convenient, which can simplify the overall structure of the automatic liquid replenishment tool.

[0063] In this embodiment, the top of the liquid storage tank 3 is provided with a liquid inlet 4, and a sealing cap 5 is provided in the liquid inlet 4. When it is necessary to replenish the liquid storage tank 3, the sealing cap 5 is opened to replenish the liquid storage tank 3. When it is not necessary to replenish the liquid, the sealing cap 5 covers the liquid inlet 4, so that a sealed chamber is formed inside the liquid storage tank 3. The design of the liquid inlet 4 and the sealing cap 5 can not only ensure that a sealed chamber is formed inside the liquid storage tank 3, but also ensure timely replenishment of the liquid storage tank 3, ensuring that the liquid storage tank 3 can continuously supply liquid to the dipping tank 10, and ensuring the continuous stability of the liquid supply.

[0064] In this embodiment, a first valve 6 is provided in the connecting air pipe 7. When the liquid storage tank 3 no longer supplies liquid to the dipping tank 10, for example, when the automatic liquid replenishment tool needs to be repaired or replaced, or when the coating in the liquid storage tank 3 needs to be replaced, the first valve 6 can be closed to prevent negative pressure from forming in the liquid storage tank 3 and affecting the internal feeding or discharging operations of the liquid storage tank 3.

[0065] In this embodiment, a second valve 8 is provided in the connecting liquid pipe 2. When the storage tank 3 no longer supplies liquid to the dipping tank 10, for example, when the automatic liquid replenishment tool needs to be repaired or replaced, or when the coating in the storage tank 3 needs to be replaced, the second valve 8 can be closed to prevent negative pressure from forming in the storage tank 3 and affecting the feeding or discharging operations inside the storage tank 3.

[0066] In this embodiment, the first valve 6 and the second valve 8 can be used together. They can be closed at the same time to cut off the connection between the storage tank 3 and the dipping tank 10, or opened at the same time to connect the storage tank 3 and the dipping tank 10.

[0067] In this embodiment, a drain valve 11 is provided at the bottom of the dip coating tank 10. When the coating material in the dip coating tank 10 needs to be drained, the drain valve 11 is opened to allow the coating material to be completely drained. The drain valve 11 facilitates the timely discharge of coating material from the dip coating tank 10.

[0068] In the initial state, the drain valve 11 is opened to drain the paint from the dip coating tank 10; the first valve 6 and the second valve 8 are closed, the sealing cap 5 is opened, and paint is added to the storage tank 3 through the inlet 4; then the sealing cap 5 is placed over the inlet 4, forming a sealed chamber inside the storage tank 3. When it is necessary to supply liquid to the dip coating tank 10, the drain valve 11 is closed, the first valve 6 and the second valve 8 are opened, and the bottom of the storage tank 3 is connected to the inlet 4 of the dip coating tank 10 through the connecting liquid pipe 2; the first end 71 of the connecting air pipe is connected to the air inside the storage tank 3, and the second end 72 of the connecting air pipe is located inside the dip coating tank 10; when the liquid level in the dip coating tank 10 has not reached the first preset height, the second end 72 of the connecting air pipe is connected to the air, and the paint in the storage tank 3 enters the dip coating tank 10 through the connecting liquid pipe 2; when the liquid level in the dip coating tank 10 reaches the first preset height... When the liquid level rises to the first preset height, the second end 72 of the connecting air pipe is blocked by the buoyancy component 12. At this time, the air pressure at the top of the storage tank 3 is slightly lower than atmospheric pressure, which is insufficient to overcome the gravity of the coating. Therefore, some coating still flows from the storage tank 3 into the dipping tank 10. As the coating flows from the storage tank 3 into the dipping tank 10, the air pressure at the top of the storage tank 3 gradually decreases until a vacuum negative pressure is formed that can overcome the gravity of the coating. At this time, the liquid level in the dipping tank 10 rises to the second preset height, and the storage tank 3 and the dipping tank 10 reach a balanced state. The coating no longer flows out of the storage tank 3. This ensures that the storage tank 3 automatically replenishes the dipping tank 10.

[0069] Example 4

[0070] like Figure 3As shown, this application provides an automatic liquid replenishment fixture for automatically replenishing the coating in an immersion coating tank 10, wherein the coating contains a volatile solvent; it includes a sealed storage tank 3 and an immersion coating tank 10 with an open opening, the bottom of the storage tank 3 being connected to the inlet 4 of the immersion coating tank 10 via a connecting liquid pipe 2; the bottom height of the storage tank 3 is greater than the height of the inlet 4 of the immersion coating tank 10;

[0071] It also includes a connecting air pipe 7, the first end 71 of which is connected to the air in the liquid storage tank 3; when the liquid level in the dip coating tank 10 does not reach the first preset height, the second end 72 of the connecting air pipe is connected to the air; when the liquid level in the dip coating tank 10 reaches the first preset height, the second end 72 of the connecting air pipe is blocked.

[0072] Furthermore, a liquid level sensor 13 is provided on the inner wall of the dip coating tank 10, and a control valve 14 is provided in the connecting air pipe 7. The liquid level sensor 13 is communicatively connected to the control valve 14. When the liquid level in the dip coating tank 10 does not reach the first preset height, the second end 72 of the connecting air pipe is connected to the air, and the control valve 14 is opened. When the liquid level sensor 13 detects that the liquid level in the dip coating tank 10 has reached the first preset height, the control valve 14 is closed.

[0073] In this embodiment, the second end 72 of the connecting air pipe is located outside the dipping tank 10, and a liquid level sensor 13 is installed at a first preset height position inside the dipping tank 10. When the liquid level in the dipping tank 10 rises to the first preset height, the control valve 14 in the connecting air pipe 7 closes, sealing the second end 72 of the connecting air pipe. At this time, the air pressure at the top of the storage tank 3 is slightly less than atmospheric pressure, which is insufficient to overcome the gravity of the coating. Therefore, some coating still flows from the storage tank 3 into the dipping tank 10. As the coating flows from the storage tank 3 into the dipping tank 10, the air pressure at the top of the storage tank 3 gradually decreases until a vacuum negative pressure is formed that can overcome the gravity of the coating. At this time, the liquid level in the dipping tank 10 rises to the second preset height, and the storage tank 3 and the dipping tank 10 reach a balanced state, and the coating no longer flows out of the storage tank 3. The second end 72 of the connecting air pipe is liquid-sealed by the buoyancy component 12 in the dipping tank 10. The structure is simple and the operation is convenient, which can simplify the overall structure of the automatic liquid replenishment tool.

[0074] In this embodiment, the top of the liquid storage tank 3 is provided with a liquid inlet 4, and a sealing cap 5 is provided in the liquid inlet 4. When it is necessary to replenish the liquid storage tank 3, the sealing cap 5 is opened to replenish the liquid storage tank 3. When it is not necessary to replenish the liquid, the sealing cap 5 covers the liquid inlet 4, so that a sealed chamber is formed inside the liquid storage tank 3. The design of the liquid inlet 4 and the sealing cap 5 can not only ensure that a sealed chamber is formed inside the liquid storage tank 3, but also ensure timely replenishment of the liquid storage tank 3, ensuring that the liquid storage tank 3 can continuously supply liquid to the dipping tank 10, and ensuring the continuous stability of the liquid supply.

[0075] In this embodiment, a first valve 6 is provided in the connecting air pipe 7. When the liquid storage tank 3 no longer supplies liquid to the dipping tank 10, for example, when the automatic liquid replenishment tool needs to be repaired or replaced, or when the coating in the liquid storage tank 3 needs to be replaced, the first valve 6 can be closed to prevent negative pressure from forming in the liquid storage tank 3 and affecting the internal feeding or discharging operations of the liquid storage tank 3.

[0076] In this embodiment, a second valve 8 is provided in the connecting liquid pipe 2. When the storage tank 3 no longer supplies liquid to the dipping tank 10, for example, when the automatic liquid replenishment tool needs to be repaired or replaced, or when the coating in the storage tank 3 needs to be replaced, the second valve 8 can be closed to prevent negative pressure from forming in the storage tank 3 and affecting the feeding or discharging operations inside the storage tank 3.

[0077] In this embodiment, the first valve 6 and the second valve 8 can be used together. They can be closed at the same time to cut off the connection between the storage tank 3 and the dipping tank 10, or opened at the same time to connect the storage tank 3 and the dipping tank 10.

[0078] In this embodiment, a drain valve 11 is provided at the bottom of the dip coating tank 10. When the coating material in the dip coating tank 10 needs to be drained, the drain valve 11 is opened to allow the coating material to be completely drained. The drain valve 11 facilitates the timely discharge of coating material from the dip coating tank 10.

[0079] In the initial state, the drain valve 11 is opened to drain the paint from the dip coating tank 10; the first valve 6 and the second valve 8 are closed, the sealing cap 5 is opened, and paint is added to the storage tank 3 through the inlet 4; then the sealing cap 5 is placed over the inlet 4, forming a sealed chamber inside the storage tank 3. When it is necessary to supply liquid to the dip coating tank 10, the drain valve 11 is closed, the first valve 6 and the second valve 8 are opened, and the bottom of the storage tank 3 is connected to the inlet 4 of the dip coating tank 10 via the connecting liquid pipe 2; the first end 71 of the connecting air pipe is connected to the air inside the storage tank 3, and the second end 72 of the connecting air pipe is located inside the dip coating tank 10; when the liquid level in the dip coating tank 10 has not reached the first preset height, the second end 72 of the connecting air pipe is connected to the air, and the paint in the storage tank 3 enters the dip coating tank 10 through the connecting liquid pipe 2; when the liquid level in the dip coating tank 10 rises... When the liquid reaches the first preset height, the second end 72 of the connecting air pipe is sealed as the control valve 14 closes. At this time, the air pressure at the top of the storage tank 3 is slightly lower than atmospheric pressure, which is insufficient to overcome the gravity of the coating. Therefore, some coating still flows from the storage tank 3 into the dipping tank 10. As the coating flows from the storage tank 3 into the dipping tank 10, the air pressure at the top of the storage tank 3 gradually decreases until a vacuum negative pressure is formed that can overcome the gravity of the coating. At this time, the liquid level in the dipping tank 10 rises to the second preset height, and the storage tank 3 and the dipping tank 10 reach a balanced state. The coating no longer flows out of the storage tank 3. This ensures that the storage tank 3 automatically replenishes the dipping tank 10.

[0080] This application also provides an automatic feeding device for anti-corrosion paint, comprising an automatic liquid replenishing fixture as described above. The device automatically replenishes the dipping tank 10 through the liquid storage tank 3, ensuring that the liquid level in the dipping tank 10 remains constant. The sealed liquid storage tank 3 can protect the anti-corrosion paint and prevent its solvent from evaporating. Thus, while ensuring a quantitative supply of anti-corrosion paint, it minimizes the evaporation of solvent in the anti-corrosion paint and ensures the performance stability of the anti-corrosion paint. It can also avoid electrical hazards caused by the use of electrical control.

[0081] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings. In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0082] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0083] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0084] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic liquid replenishing tool for automatically replenishing a liquid to a coating material in a dip coating bath (10), the coating material containing a volatile solvent therein; characterized by, The automatic liquid replenishment fixture includes a sealed liquid storage tank (3) and an open dip coating tank (10). The bottom of the liquid storage tank (3) is connected to the liquid inlet (4) of the dip coating tank (10) via a connecting liquid pipe (2). The bottom height of the liquid storage tank (3) is greater than the height of the liquid inlet (4) of the dip coating tank (10). The automatic liquid replenishment fixture also includes a connecting air pipe (7), the first end (71) of which is connected to the air in the liquid storage tank (3); when the liquid level in the immersion tank (10) does not reach the first preset height, the second end (72) of the connecting air pipe is connected to the air; when the liquid level in the immersion tank (10) reaches the first preset height, the second end (72) of the connecting air pipe is blocked.

2. The automatic liquid supplementing tool according to claim 1, wherein When a negative pressure is formed inside the storage tank (3) and no longer supplying liquid to the dip coating tank (10), the liquid level in the dip coating tank (10) is taken as the second preset height, and the first preset height is less than the second preset height.

3. The automatic liquid supplementing tool according to claim 1, wherein The second end (72) of the connecting air pipe is located inside the dip coating tank (10); when the liquid level in the dip coating tank (10) does not reach the first preset height, the second end (72) of the connecting air pipe is connected to the air at the top of the dip coating tank (10); when the liquid level in the dip coating tank (10) reaches the first preset height, the second end (72) of the connecting air pipe abuts against the coating in the dip coating tank (10).

4. The automatic liquid supplementing tool according to claim 1, wherein A buoyancy element (12) is provided on the surface of the coating liquid in the dip coating tank (10). When the liquid level in the dip coating tank (10) does not reach the first preset height, the second end (72) of the connecting air pipe is connected to the air at the top of the dip coating tank (10). When the liquid level in the dip coating tank (10) reaches the first preset height, the second end (72) of the connecting air pipe abuts against the buoyancy element (12).

5. An automatic liquid replenishment fixture according to claim 1, characterized in that, A liquid level sensor (13) is provided on the inner wall of the dip coating tank (10), and a control valve (14) is provided in the connecting air pipe (7). The liquid level sensor (13) is communicatively connected to the control valve (14). When the liquid level in the dip coating tank (10) does not reach the first preset height, the second end (72) of the connecting air pipe is connected to the air, and the control valve (14) is opened. When the liquid level sensor (13) detects that the liquid level in the dip coating tank (10) has reached the first preset height, the control valve (14) is closed.

6. The automatic liquid supplementing tool of claim 1, wherein The top of the storage tank (3) is provided with a liquid inlet (4), and a sealing cap (5) is provided in the liquid inlet (4).

7. The automatic liquid supplementing tool of claim 1, wherein A first valve (6) is provided in the connecting air pipe (7).

8. The automatic liquid supplementing tool according to claim 1, wherein A second valve (8) is provided in the connecting liquid pipe (2).

9. The automatic liquid supplementing tool of claim 1, wherein, The bottom of the dip coating tank (10) is provided with a drain valve (11).

10. An automatic supply device for anticorrosive paint, characterized by The invention includes an automatic liquid replenishment fixture as described in any one of claims 1-9.

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