Vacuum degassing equipment for removing paint bubbles
By designing a vacuum degassing equipment including a vacuum degassing tank, circulation pump and filter, the problem of difficulty in removing bubbles during the agitation of the paint is solved, effectively removing bubbles in the paint is achieved, and smoothing the coating is improved and protection performance.
Patent Information
- Application Number
- CN202421287439.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-06
AI Technical Summary
In the prior art, it is difficult to effectively remove bubbles at the liquid-gas interface and bubbles remaining in the paint during the coating agitation process, affecting the smoothness and protective performance of the coating.
A vacuum degassing device including a vacuum degassing tank, a vacuum pump, a circulation pump, a venturi tube, a hollow shaft and a filter are designed. The air pump tube is rotated simultaneously by the rotation of the hollow shaft, and the bubbles are sucked into the venturi tube and intercepted through the filter, achieving effective removal of bubbles in the paint.
Through the design of the circulation pump and venturi tube, the equipment improves the effect and efficiency of the floating bubbles on the coating liquid surface, ensuring the smoothness and protective performance of the coating.
Smart Images
Figure CN222517800U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of removing paint bubbles, in particular to vacuum degassing equipment for removing paint bubbles. Background Art
[0002] As we all know, bubbles are easily generated in the coating during the production and mixing process. The bubbles in the coating will cause the coating surface to be uneven, affecting the visual effect, destroying the smoothness and glossiness of the coating, and reducing the decorative effect. The presence of bubbles will affect the uniformity of the coating, thereby weakening the protective properties of the coating, such as corrosion resistance, water resistance, wear resistance, etc., and shortening the life of the coating.
[0003] For example, a Chinese utility model patent discloses a vacuum degassing system for the milk preparation process (publication (announcement) number CN215741938U), which includes a vacuum degassing tank, an agitator is fixedly installed at the bottom of the inner cavity of the vacuum degassing tank, an automatic exhaust valve and a vacuum pump are fixedly installed on the top side wall of the vacuum degassing tank, shock-absorbing support legs are welded to the bottom of the vacuum degassing tank, and an injection barrel is arranged on the top of the vacuum degassing tank. Reinforcement rods connected to the inner wall of the vacuum degassing tank are symmetrically welded on the outer walls of both sides of the injection barrel, and a liquid level fixed-distance discharging mechanism is fixedly installed on the reinforcement rod. The top feed port of the liquid level fixed-distance discharging mechanism is connected to the injection barrel, which can effectively prevent the collision of milk when it is added, causing air to enter again, effectively realize the degassing of milk, greatly increase the degassing efficiency, and reduce material waste. It is installed before the mixing tank to reduce bubble production and thus reduce the difficulty of cleaning, thereby playing a role in energy saving and environmental protection.
[0004] However, when the inventors implemented this device, they found the following defects: although it can avoid collision when liquid materials are added and prevent the entry of air, during the stirring process of the coating, there are still some bubbles at the liquid-gas interface and bubbles remaining in the coating, and the bubble removal effect needs to be further improved. Utility Model Content
[0005] Technical issues
[0006] In view of the deficiencies of the prior art, the utility model provides a vacuum degassing device for removing paint bubbles, which can further effectively remove paint inside the paint and at the interface between the paint and air.
[0007] Technical Solution
[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vacuum degassing device for removing paint bubbles, comprising a vacuum degassing tank and a vacuum pump for vacuum treatment; also comprising a circulating pump, a venturi tube, a hollow shaft and a filter, wherein the hollow shaft is rotatably installed in the vacuum degassing tank, and a driver for providing power for the rotation of the hollow shaft is installed on the vacuum degassing tank, the bottom of the hollow shaft is connected and rotatably connected to the neck input end of the venturi tube, the input end of the circulating pump is connected to the output end of the venturi tube, the output end of the circulating pump is connected to the input end of the filter, the output end of the filter extends into the vacuum degassing tank, and the upper part of the hollow shaft is provided with a plurality of air extraction holes connected to the inside of the hollow shaft; further, the driver is preferably a reduction motor; the hollow shaft and the neck of the venturi tube are rotatably sealed and connected by a rotating seal such as a mechanical shaft seal; the filter is equipped with a filter cartridge that allows liquid paint to pass through and has a retention effect on bubbles, and a discharge valve is provided at the bottom of the filter.
[0009] As a preferred solution, it also includes an exhaust pipe fixedly mounted on the hollow shaft, wherein a plurality of evenly distributed through holes are provided on the side wall of the exhaust pipe, and the interior of the exhaust pipe is connected to the exhaust holes; further, the exhaust holes face one side of the rotation direction of the hollow shaft.
[0010] As a preferred solution, a plurality of stirring paddles are installed on the hollow shaft.
[0011] As a preferred solution, a bending portion is provided on the exhaust pipe.
[0012] As a preferred solution, a liquid level tube is installed on the outer wall of the vacuum degassing tank, and an overflow pipe is provided on the upper part of the liquid level tube.
[0013] As a preferred solution, the overflow pipe and the exhaust pipe are located at the same horizontal height; further, the through hole on the exhaust pipe is located higher than the highest liquid level in the vacuum degassing tank or is flush with the highest liquid level in the vacuum degassing tank.
[0014] As a preferred solution, the input end of the vacuum pump extends into the upper part of the vacuum degassing tank and is higher than the overflow pipe.
[0015] Beneficial Effects
[0016] Compared with the prior art, the utility model provides a vacuum degassing device for removing paint bubbles, which has the following beneficial effects: the vacuum degassing device for removing paint bubbles starts the circulation pump to allow the paint to be sucked into the venturi tube. Since the paint flow rate in the neck of the venturi tube is fast and the air pressure is low, the bubbles at the liquid-gas interface in the vacuum degassing tank enter the venturi tube through the suction hole, and the paint and the bubbles enter the filter. The filter intercepts the bubbles, and the paint re-enters the vacuum filter tank, which plays a role in homogenizing the paint up and down, while effectively removing the bubbles in the paint and at the liquid-gas interface. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0018] Figure 2 It is a schematic diagram of the top view structure of the utility model;
[0019] Figure 3 The utility model Figure 2 Schematic diagram of the cross-section structure at AA in the middle;
[0020] Figure 4 The utility model Figure 3 Schematic diagram of the cross-section structure at BB in the middle;
[0021] Markings in the attached figure: 1. vacuum degassing tank; 2. vacuum pump; 3. circulation pump; 4. venturi tube; 5. hollow shaft; 6. filter; 7. driver; 8. exhaust hole; 9. exhaust pipe; 10. through hole; 11. stirring paddle; 12. bending part; 13. liquid level tube; 14. overflow pipe. DETAILED DESCRIPTION
[0022] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0023] As described in the background technology, a vacuum degassing system in the milk preparation process can avoid collision when liquid materials are added and prevent the entry of air. However, during the stirring process of the coating, there are still certain bubbles at the liquid-gas interface and bubbles remaining in the coating, and the bubble removal effect needs to be further improved.
[0024] In order to solve this technical problem, the utility model provides a vacuum degassing device for removing bubbles in paint, which is applied to remove bubbles in paint.
[0025] Specifically, please refer to Figure 1-4 The vacuum degassing equipment for removing paint bubbles specifically includes: a vacuum degassing tank 1 and a vacuum pump 2 for vacuum treatment; it also includes a circulating pump 3, a venturi tube 4, a hollow shaft 5 and a filter 6. The hollow shaft 5 is rotatably installed in the vacuum degassing tank 1. A driver 7 for providing power for the rotation of the hollow shaft 5 is installed on the vacuum degassing tank 1. The bottom of the hollow shaft 5 is connected to the neck input end of the venturi tube 4 and is rotatably connected. The input end of the circulating pump 3 is connected to the output end of the venturi tube 4, and the output end of the circulating pump 3 is connected to the output end of the filter 6. The inlet end is connected, and the output end of the filter 6 extends into the vacuum degassing tank 1. The upper part of the hollow shaft 5 is provided with a plurality of exhaust holes 8 connected with the inside of the hollow shaft 5; further, the driver 7 is preferably a reduction motor; the hollow shaft 5 and the neck of the venturi tube 4 are rotationally sealed and connected by a rotating seal such as a mechanical shaft seal; the filter 6 is equipped with a filter cartridge that allows liquid coating to pass through and has a trapping effect on bubbles, and a discharge valve is provided at the bottom of the filter 6; the bubbles trapped by the filter cartridge are coated around the filter cartridge, and small bubbles aggregate to form large bubbles.
[0026] The vacuum degassing equipment for removing paint bubbles provided by the utility model starts the circulation pump 3 so that the paint is sucked into the venturi tube 4. Since the paint flow rate in the neck of the venturi tube 4 is fast and the air pressure is low, the bubbles at the liquid-gas interface in the vacuum degassing tank 1 enter the venturi tube 4 through the air suction hole 8, and the paint and the bubbles enter the filter 6. The filter 6 retains the bubbles and the retained bubbles can be discharged together with a small amount of paint by regularly opening the discharge valve. This part of the discharged paint can be re-injected into the vacuum degassing tank 1 after standing to remove bubbles, and the paint filtered by the filter 6 re-enters the vacuum filter tank, which plays a role in homogenizing the paint up and down, and effectively removes the bubbles in the paint and at the liquid-gas interface.
[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.
[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.
[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0030] Example 1
[0031] Please refer to Figure 1-3 , a vacuum degassing device for removing paint bubbles, comprising a vacuum degassing tank 1 and a vacuum pump 2 for vacuuming the inside of the vacuum degassing tank 1; further comprising a circulating pump 3, a venturi tube 4, a hollow shaft 5 and a filter 6, the hollow shaft 5 being rotatably installed in the vacuum degassing tank 1, a driver 7 for providing power for the rotation of the hollow shaft 5 being installed on the vacuum degassing tank 1, the bottom of the hollow shaft 5 being connected and rotatably connected to the neck input end of the venturi tube 4, the input end of the circulating pump 3 being connected to the output end of the venturi tube 4, the output end of the circulating pump 3 being connected to the input end of the filter 6, the output end of the filter 6 extending into the vacuum degassing tank 1, a plurality of exhaust holes 8 being connected to the inside of the hollow shaft 5 being provided on the upper part of the hollow shaft 5; further comprising an exhaust pipe 9 fixedly installed on the hollow shaft 5, a plurality of evenly distributed through holes 10 being provided on the side wall of the exhaust pipe 9, the inside of the exhaust pipe 9 being connected to the exhaust holes 8; further, the exhaust holes 8 are facing the side of the rotation direction of the hollow shaft 5.
[0032] The vacuum degassing equipment for removing paint bubbles provided in this embodiment has the hollow shaft 5 driving the exhaust pipe 9 to rotate synchronously during the rotation process, and the exhaust pipe 9 can promote the bubbles floating on the upper surface of the paint liquid to aggregate during the rotation process, and the aggregated bubbles enter the venturi tube 4 through the through hole 10 and the hollow shaft 5, further improving the effect and efficiency of suction of the bubbles floating on the paint liquid surface.
[0033] Example 2
[0034] The vacuum degassing equipment for removing paint bubbles provided in Example 1 is further optimized, specifically, as follows: Figure 3 As shown, a plurality of stirring paddles 11 are installed on the hollow shaft 5 ; and a bending portion 12 is provided on the exhaust pipe 9 .
[0035] The vacuum degassing equipment for removing paint bubbles provided in this embodiment has the hollow shaft 5 driving the stirring paddle 11 to rotate during the rotation process. The vortex effect generated by the rotation of the stirring paddle 11 can cause the gas in the paint to move and be lifted from the paint to the surface to form bubbles, thereby prompting the bubbles to be sucked into the filter 6 so that these bubbles can be removed by the filter 6; and the bending portion 12 can prompt the bubbles on the paint liquid surface to move closer to the hollow shaft 5, so that the bubbles can be more smoothly sucked into the through hole 10.
[0036] Example 3
[0037] The vacuum degassing equipment for removing paint bubbles provided in Example 2 is further optimized, specifically, as follows: Figure 1-4As shown, a liquid level tube 13 is installed on the outer wall of the vacuum degassing tank 1, and an overflow pipe 14 is provided on the upper part of the liquid level tube 13; the overflow pipe 14 and the exhaust pipe 9 are located at the same horizontal height; further, the through hole 10 on the exhaust pipe 9 is located higher than the highest liquid level in the vacuum degassing tank 1 or is flush with the highest liquid level in the vacuum degassing tank 1; more specifically, a shut-off valve is installed on the overflow pipe 14.
[0038] The vacuum degassing equipment for removing paint bubbles provided in this embodiment can observe the liquid level in the vacuum degassing tank 1 in real time through the liquid level tube 13. When the paint submerges the overflow tube 14, the paint flows out from the overflow tube 14. The liquid level in the vacuum degassing tank 1 can be controlled through the overflow tube 14 to prevent the liquid level in the vacuum degassing tank 1 from being higher than the exhaust pipe 9, and to prevent the exhaust pipe 9 from being immersed below the liquid surface, so as to ensure that the exhaust pipe 9 is exactly located at the paint liquid surface, thereby ensuring the smooth extraction of bubbles at the paint liquid surface.
[0039] Specifically, the input end of the vacuum pump 2 extends into the upper part of the vacuum degassing tank 1 and is higher than the overflow pipe 14; the vacuum pump 2 can perform vacuum treatment on the upper part of the vacuum degassing tank 1, which is beneficial to the removal of bubbles at the paint liquid surface, and the input end of the vacuum pump 2 is higher than the overflow pipe 14 to prevent the vacuum pump 2 from extracting the paint in the vacuum degassing tank 1; in another embodiment, the filter 6 is higher than the highest liquid level of the vacuum degassing tank 1, and the input end of the vacuum pump 2 is connected to the inside of the filter 6; the vacuum pump 2 is used to vacuum the inside of the filter 6 to rupture the large bubbles after polymerization, and to extract the excess gas in the filter 6 to achieve the purpose of bubble removal. This method does not require a large amount of vacuum treatment in the vacuum degassing tank 1, but only requires vacuum treatment in the filter 6, which can effectively reduce the vacuum amount of the vacuum pump 2 and is more energy-efficient.
[0040] The use process of the vacuum degassing equipment for removing paint bubbles provided by the utility model is as follows: the paint is sucked into the venturi tube 4 by starting the circulation pump 3. Since the paint flow rate in the neck of the venturi tube 4 is fast and the air pressure is low, the driver 7 drives the hollow shaft 5 to rotate, and the exhaust pipe 9 rotates synchronously with the hollow shaft 5. The bubbles at the liquid-gas interface in the vacuum degassing tank 1 enter the venturi tube 4 through the through hole 10 and the exhaust hole 8, and the paint and the bubbles enter the filter 6. The filter 6 intercepts the bubbles, and the paint re-enters the vacuum filter tank. The vacuum pump 2 is then used to evacuate the inside of the vacuum degassing tank 1, thereby realizing the rapid removal of bubbles in the paint.
[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0042] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.
Claims
1. A vacuum degassing device for removing bubbles from a coating, comprising a vacuum degassing tank (1) and a vacuum pump (2) for vacuuming; characterized in that: The invention also comprises a circulation pump (3), a venturi tube (4), a hollow shaft (5) and a filter (6); the hollow shaft (5) is rotatably mounted in a vacuum degassing tank (1); a driver (7) is mounted on the vacuum degassing tank (1) to provide power for the rotation of the hollow shaft (5); the bottom of the hollow shaft (5) is connected to the neck input end of the venturi tube (4) and is rotatably connected; the input end of the circulation pump (3) is connected to the output end of the venturi tube (4); the output end of the circulation pump (3) is connected to the input end of the filter (6); the output end of the filter (6) extends into the vacuum degassing tank (1); and a plurality of air extraction holes (8) connected to the inside of the hollow shaft (5) are provided on the upper part of the hollow shaft (5).
2. The vacuum degassing equipment for removing paint bubbles according to claim 1, characterized in that: It also includes an air extraction pipe (9) fixedly mounted on the hollow shaft (5), a plurality of evenly distributed through holes (10) are provided on the side wall of the air extraction pipe (9), and the interior of the air extraction pipe (9) is in communication with the air extraction hole (8).
3. The vacuum degassing equipment for removing paint bubbles according to claim 2, characterized in that: A plurality of stirring paddles (11) are mounted on the hollow shaft (5).
4. The vacuum degassing equipment for removing paint bubbles according to claim 2 or 3, characterized in that: The exhaust pipe (9) is provided with a bending portion (12).
5. The vacuum degassing equipment for removing paint bubbles according to claim 2, characterized in that: A liquid level pipe (13) is installed on the outer wall of the vacuum degassing tank (1), and an overflow pipe (14) is provided on the upper part of the liquid level pipe (13).
6. The vacuum degassing equipment for removing paint bubbles according to claim 5, characterized in that: The overflow pipe (14) and the air extraction pipe (9) are located at the same level.
7. The vacuum degassing equipment for removing paint bubbles according to claim 6, characterized in that: The input end of the vacuum pump (2) extends into the upper part of the vacuum degassing tank (1) and is higher than the overflow pipe (14).