Coating recovery system

Abstract

The utility model relates to the technical field of battery processing, and discloses a coating recovery system which comprises a recovery tank, a first conveying pipe, a primary filtering device, a second conveying pipe, a stirring kettle, a third conveying pipe, a secondary filtering device and a fourth conveying pipe, the primary filtering device is provided with a feeding hole and a first liquid outlet, and the first conveying pipe is respectively communicated with the recycling tank and the feeding hole; the stirring kettle is provided with a liquid inlet and a second liquid outlet, and the second conveying pipe is communicated with the first liquid storage opening and the liquid inlet respectively; the third conveying device is respectively communicated with a second liquid outlet and the secondary filtering device; the fourth conveying pipe is communicated with the secondary filtering device; according to the coating recovery system provided by the utility model, the recovery tank, the first conveying pipe, the primary filtering device, the second conveying pipe, the stirring kettle, the third conveying pipe, the secondary filtering device and the fourth conveying pipe are coordinated and matched, so that small molecular impurities in the coating can be removed, and the purity and the quality of the recycled coating are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery processing technology, and in particular to a paint recycling system. Background Technology

[0002] Existing paint recycling systems primarily focus on filtering used paint. Through filtration devices such as filter screens and filter cartridges, they aim to remove solid impurities from the paint, such as dust particles, undissolved pigment agglomerates, and other foreign matter that may have mixed into the paint, in order to achieve preliminary purification of the paint and enable it to meet the basic requirements for reuse to a certain extent.

[0003] However, this method of treatment relying solely on filtration has obvious limitations. In actual operation, it was found that the filtered paint will produce sediment during storage or subsequent short-term settling. This is because some components in the paint, such as pigments and additives, although most impurities are removed after filtration, the uniformity of dispersion among the components is not effectively improved. Moreover, some particles in the paint will gradually aggregate and settle to the bottom of the container without external intervention, forming a sediment layer.

[0004] The formation of these sediments can cause numerous problems. On the one hand, sedimentation can lead to uneven distribution of coating components, causing fluctuations in coating performance. For example, color consistency of the coating is difficult to guarantee, and color differences may occur when it is used for product surface coating, affecting the appearance quality of the product. At the same time, key performance indicators such as viscosity and adhesion of the coating will also be affected, thereby reducing the coating effect and failing to meet the product's quality requirements for the coating. On the other hand, the accumulation of sediment can lead to waste of coating. As the sediment layer thickens, the coating at the bottom of the container cannot be used normally and has to be discarded. This not only increases the company's production costs but also causes unnecessary loss of resources. Utility Model Content

[0005] With the aim of at least solving one of the technical problems existing in the prior art, this utility model aims to provide a paint recycling system that can prevent paint from settling and help reduce resource waste.

[0006] To achieve the above objectives, this utility model provides a paint recycling system, including a recycling tank, a first conveying pipe, a primary filtration device, a second conveying pipe, a mixing tank, and a third conveying pipe; the recycling tank is used to collect paint; the inlet end of the first conveying pipe is connected to the recycling tank; the primary filtration device has an inlet and a first outlet, the outlet end of the first conveying pipe is connected to the inlet, and the primary filtration device is used to filter solid impurities in the paint; the inlet end of the second conveying pipe is connected to the inlet; the mixing tank has an inlet and a second outlet, the outlet end of the second conveying pipe is connected to the inlet, and the mixing tank is used to stir the paint; the inlet end of the third conveying pipe is connected to the second outlet, and the outlet end of the third conveying pipe is connected to a spraying device.

[0007] Compared with the prior art, the paint recycling system of this utility model has the following advantages: when the spraying device sprays the workpiece, the paint that does not adhere to the workpiece is transported to the recycling tank for collection. The paint in the recycling tank is transported to the primary filtration device through the first conveying pipe. The primary filtration device filters the solid impurities in the paint, which can separate the solid impurities from the liquid paint. Then, the liquid paint is transported to the stirring tank through the second conveying pipe. The stirring tank can stir the liquid paint, which can make the paint fully mixed and uniform, thereby preventing the paint from settling and improving the stability and uniformity of the paint, which helps to reduce paint waste. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of a paint recycling system provided in an embodiment of this utility model;

[0009] Figure 2 This is a cross-sectional view of the primary filtration device provided in this embodiment of the utility model;

[0010] Figure 3 This is a schematic diagram showing the tilt angle of the filter screen relative to the direction of gravity provided in this embodiment of the utility model;

[0011] Figure 4 This is a cross-sectional view of the stirring vessel provided in an embodiment of this utility model.

[0012] In the diagram, 1 represents the recycling tank;

[0013] 2. First delivery pipe; 21. First delivery pump;

[0014] 3. Primary filtration device; 31. Housing; 32. Filter element; 311. Feed inlet; 312. First liquid outlet; 313. Receptacle; 314. Waste chamber; 315. Waste discharge outlet; 321. Frame; 322. Filter screen; 3131. Feeding area; 3132. Liquid outlet; 3133. Interception area;

[0015] 4. Second delivery pipe; 41. Second delivery pump;

[0016] 5. Stirring vessel; 51. Vessel body; 52. Stirring rod; 53. Stirring blade; 54. Stirring motor; 511. Liquid inlet; 512. Second liquid outlet; 513. Receiving cavity; 5121. Discharge valve;

[0017] 6. Third delivery pipe; 61. Third delivery pump;

[0018] 7. Secondary filtration device;

[0019] 8. Fourth delivery pipe;

[0020] 9. Spraying device; Z, direction of gravity; R, direction of liquid flow in the accommodating cavity. Detailed Implementation

[0021] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having" and any variations thereof in the description, claims and foregoing drawings of this application are intended to cover non-exclusive inclusion.

[0027] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0028] like Figures 1-4 As shown, a preferred embodiment of the present invention provides a paint recycling system, comprising a recycling tank 1, a first conveying pipe 2, a primary filtration device 3, a second conveying pipe 4, a mixing vessel 5, and a third conveying pipe 6.

[0029] The recovery tank 1 is used to collect paint; the inlet end of the first conveying pipe 2 is connected to the recovery tank; the primary filtration device 3 has an inlet 311 and a first outlet 312, the outlet end of the first conveying pipe 2 is connected to the inlet 311, and the primary filtration device 3 is used to filter solid impurities in the paint; the inlet end of the second conveying pipe 4 is connected to the inlet 311; the stirring vessel 5 has an inlet 511 and a second outlet 512, the outlet end of the second conveying pipe 4 is connected to the inlet 511, and the stirring vessel 5 is used to stir the paint; the inlet end of the third conveying pipe 6 is connected to the second outlet 512, and the outlet end of the third conveying pipe 6 is connected to the spraying device 9.

[0030] Based on this technical solution, when the spraying device 9 sprays the workpiece, the paint that does not adhere to the workpiece is transported to the recovery tank 1 for recovery. The paint in the recovery tank 1 is transported to the primary filter device 3 through the first conveying pipe 2. The primary filter device 3 filters the paint to separate solid impurities from the liquid paint. Then, the liquid paint is transported to the mixing tank 5 through the second conveying pipe 4. The mixing tank 5 stirs the liquid paint to make the paint fully mixed and uniform, thereby preventing the paint from settling and improving the stability and uniformity of the paint, which helps to reduce paint waste.

[0031] See Figure 1 The paint recycling system provided in this embodiment of the present invention also includes a secondary filtration device 7 and a fourth conveying pipe 8. The secondary filtration device 7 is used to filter small molecule impurities in the paint, and the outlet end of the third conveying pipe 6 is connected to the spraying device 9 through the secondary filtration device 7 and the fourth conveying pipe 8.

[0032] Specifically, the outlet end of the third conveying pipe 6 is connected to the secondary filtration device 7, the inlet end of the fourth conveying pipe 8 is connected to the secondary filtration device 7, and the outlet end of the fourth conveying pipe 8 is connected to the spraying device 9. The liquid paint is conveyed to the secondary filtration device 7 through the second conveying pipe 4 for filtration to remove small molecule impurities from the paint, thereby improving the purity and quality of the recycled paint. The paint filtered by the secondary filtration device 7 can be conveyed to the spraying device 9 through the fourth conveying pipe 8 for direct use.

[0033] The secondary filtration device 7 can be, but is not limited to, a membrane filter, a depth filter, a ceramic filter, or a cotton filter. When a cotton filter is used, the cotton is PP cotton.

[0034] The spraying device 9 includes a material tank and a spray gun connected to the material tank, and the outlet end of the fourth conveying pipe 8 is connected to the material tank.

[0035] It should be noted that, in this utility model Figure 1 In the diagram, the arrow indicates the direction of fluid flow within the delivery pipe, and the end where the arrow is located is the outlet end of the delivery pipe. The other end of the delivery pipe opposite the outlet end is the inlet end of the delivery pipe.

[0036] The paint recycling system provided in this embodiment of the invention further includes a first conveying pump 21, a second conveying pump 41, and a third conveying pump 61. The first conveying pump 21 is installed on the first conveying pipe 2, the second conveying pump 41 is installed on the second conveying pipe 4, and the third conveying pump 61 is installed on the third conveying pipe 6. Installing the first conveying pump 21 on the first conveying pipe 2 allows for precise control of the flow rate of paint delivered from the recycling tank 1 to the primary filtration device 3. By adjusting parameters such as the power of the conveying pump, the appropriate flow rate of material can be stably delivered according to actual needs, avoiding fluctuations in flow rate that could impact the primary filtration device 3 and ensuring its stable operation. Similarly, installing the second conveying pump 41 on the second conveying pipe 4 allows for precise control of the liquid flow rate entering the mixing tank 5 from the primary filtration device 3, based on the processing capacity and process requirements of the mixing tank 5. Likewise, installing the third conveying pump 61 on the third conveying pipe 6 controls the flow rate from the mixing tank 5 to the secondary filtration device 7, ensuring it matches the filtration capacity of the secondary filtration device 7 and guaranteeing efficient operation of each stage under suitable flow conditions.

[0037] See Figures 2-3 The primary filtration device 3 provided in this embodiment of the present invention includes a housing 31 and a filter element 32. The housing 31 has a receiving cavity 313. The filter element 32 is disposed in the receiving cavity 313 and connected to the inner wall of the receiving cavity 313. The filter element 32 divides the receiving cavity 313 into a feeding area 3131 and a liquid outlet area 3132. The feeding port 311 is disposed in the housing 31 and communicates with the feeding area 3131. The first liquid outlet 312 is disposed in the housing 31 and communicates with the liquid outlet area 3132.

[0038] By using a filter element 32 to divide the accommodating cavity 313 into a feeding zone 3131 and a liquid outlet zone 3132, this design enables the coating to achieve rapid solid-liquid separation after entering the accommodating cavity 313; solid impurities are trapped in the feeding zone 3131, while liquid coating passes through the filter element 32 and enters the liquid outlet zone 3132, thus improving the efficiency of solid-liquid separation.

[0039] The housing 31 also has a waste chamber 314, which is connected to the feed area 3131. The housing 31 is provided with a waste discharge outlet 315 connected to the waste chamber 314. By connecting the waste chamber 314 to the feed area 3131, solid impurities can directly enter the waste chamber 314 during the solid-liquid separation process. The waste discharge outlet 315 facilitates the discharge of waste, enabling centralized waste treatment and preventing waste from accumulating in the feed area 3131, which would affect the solid-liquid separation effect. Simultaneously, timely waste discharge ensures the continuous and stable operation of the primary filtration device 3, improving the efficiency of the entire paint recovery system.

[0040] In some embodiments, the waste discharge outlet 315 is connected to the inlet 311 of the recycling tank 1 or the primary filter device 3 via a pipe to achieve circulating filtration.

[0041] The filter element 32 includes a frame 321 and a filter screen 322. The frame 321 is connected to the inner wall of the receiving cavity 313, and the filter screen 322 is connected inside the frame 321. By connecting the frame 321 to the inner wall of the receiving cavity 313, the installation and fixing of the filter element 32 are more convenient. When the filter screen 322 needs to be replaced or repaired, it can be easily removed from the inner wall of the receiving cavity 313 through the frame 321, which is convenient for operation. The filter screen 322, connected to the frame 321, can effectively cover the cross-section of the receiving cavity 313, allowing the filter screen 322 to perform more comprehensive filtration of the coating entering the receiving cavity 313, thereby improving the filtration effect of the filter element 32. At the same time, the frame 321 can also support and fix the filter screen 322, ensuring that the filter screen 322 remains stable during operation, thereby improving filtration efficiency and quality.

[0042] The filter screen 322 is inclined relative to the direction of gravity Z, with its lower end close to the waste chamber 314 and its upper end away from the waste chamber 314. This inclined arrangement, with its lower end close to the waste chamber 314, allows solid impurities to slide more easily down the filter screen 322 into the waste chamber 314 under gravity, preventing accumulation of solid impurities on the filter screen 322 and making the filtration process smoother, thus improving filtration efficiency. Simultaneously, the inclined arrangement of the filter screen 322 also facilitates the flow of liquid within the receiving chamber 313. Under gravity, the liquid flows along the inclined direction of the filter screen 322, making the liquid flow more evenly during filtration and improving the filtration effect.

[0043] Preferably, the tilt angle of the filter screen 322 relative to the direction of gravity Z is α, satisfying: 15°≤a≤75°. When the tilt angle α satisfies 15°≤a≤75°, it avoids situations where the tilt angle of the filter screen 322 relative to the direction of gravity Z is too small or too large. If the tilt angle α of the filter screen 322 relative to the direction of gravity Z is too large, under the action of gravity, the solid impurities will not have enough momentum to slide down the filter screen 322, and will easily accumulate on the filter screen 322, thus affecting the filtration effect and filtration efficiency. Controlling the tilt angle α within the angle range of 15°≤a≤75° can ensure that the solid impurities can slide down into the waste chamber 314 relatively smoothly, maintaining continuous and efficient filtration. If the tilt angle α of the filter screen 322 relative to the direction of gravity Z is too small, the solid impurities will slide down too fast, and some impurities may not be fully intercepted and rush into the waste chamber 314 quickly. In fact, due to the excessive impact force, the impurities may rebound or be lifted up and remix into the liquid, affecting the quality of solid-liquid separation.

[0044] Preferably, the angle of inclination of the filter screen 322 relative to the direction of gravity Z is α, where α is 75°, 65° or 55°.

[0045] Preferably, there are multiple filter screens 322, which are arranged sequentially at intervals along the flow direction R of the liquid in the receiving cavity 313. By arranging multiple filter screens 322 sequentially along the flow direction R of the liquid in the receiving cavity 313, a multi-layer filtration structure can be formed. This allows the coating to be filtered multiple times when passing through the receiving cavity 313, further improving the accuracy and effect of filtration and more effectively removing solid impurities from the coating.

[0046] In this embodiment, the flow direction R of the liquid in the accommodating cavity 313 is basically parallel to the gravity direction Z.

[0047] An interception zone 3133 is formed between two adjacent filter screens 322, and the interception zone 3133 is connected to the waste chamber 314. The interception zone 3133 increases the interception space for solid impurities. Impurities are blocked in the interception zone 3133 and are less likely to continue flowing with the liquid, thus improving the interception efficiency. Furthermore, the connection between the interception zone 3133 and the waste chamber 314 allows the intercepted impurities to directly enter the waste chamber 314, facilitating impurity collection and cleaning, preventing impurities from accumulating in the receiving chamber 313, and ensuring the normal operation of the filtration system.

[0048] Optionally, the mesh counts of the multiple filter screens 322 can be the same or different.

[0049] Preferably, along the flow direction R of the liquid within the receiving cavity 313, the mesh count of the plurality of filter screens 322 gradually increases. The higher the mesh count of the filter screen 322, the smaller the pore size of the filter screen 322, and the finer the particles that can be filtered. Mesh count refers to the number of pores per inch of length, so mesh count is inversely proportional to pore size.

[0050] In this embodiment, the filter element 32 includes three filter screens 322. Along the flow direction of the liquid in the accommodating cavity 313, the first filter screen 322 has a mesh size of 50, the second filter screen 322 has a mesh size of 100, and the third filter screen 322 has a mesh size of 200.

[0051] See Figure 3The mixing vessel 5 provided in this embodiment of the present invention includes a vessel body 51, a stirring rod 52, a stirring blade 53, and a stirring motor 54. The vessel body 51 has a receiving cavity 513. A liquid inlet 511 is provided in the vessel body 51 and communicates with the receiving cavity 513. A second liquid outlet 512 is provided in the vessel body 51 and communicates with the receiving cavity 513. The stirring rod 52 is located inside the receiving cavity 513. The stirring blade 53 is connected to the stirring rod 52 and is located inside the receiving cavity 513. The stirring motor 54 is located outside the vessel body 51. The stirring motor 54 is connected to the stirring rod 52 and can drive the stirring rod 52 to rotate around the central axis of the stirring rod 52, so that the stirring rod 52 drives the stirring blade 53 to stir the coating in the receiving cavity 513. The stirring blade 53 stirs and mixes the liquid coating in the receiving cavity 513, so that the coating is fully and evenly mixed, thereby preventing the coating from settling and improving the stability and uniformity of the coating.

[0052] Specifically, in this embodiment, the liquid inlet 511 is located at the upper part of the vessel body 51, the second liquid outlet 512 is located at the lower part of the vessel body 51, and the stirring motor 54 is installed at the top of the vessel body 51.

[0053] A discharge valve 5121 is installed inside the second liquid outlet 512.

[0054] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A paint recovery system characterized by, The application relates to a paint recovery device, which comprises: a recovery tank (1) for collecting paint; a first conveying pipe (2) with an inlet end connected to the recovery tank (1); a primary filtering device (3) with a feeding port (311) and a first liquid outlet (312), wherein the outlet end of the first conveying pipe (2) is connected to the feeding port (311), and the primary filtering device (3) is used for filtering solid impurities in the paint; a second conveying pipe (4) with an inlet end connected to the first liquid outlet (312); a stirred tank (5) with a liquid inlet (511) and a second liquid outlet (512), wherein the outlet end of the second conveying pipe (4) is connected to the liquid inlet (511), and the stirred tank (5) is used for stirring the paint; a third conveying pipe (6) with an inlet end connected to the second liquid outlet (512), and an outlet end connected to a spraying device (9).

2. The paint recycling system of claim 1, wherein, The application further comprises a secondary filtering device (7) for filtering small molecular impurities in the paint, and a fourth conveying pipe (8) connected to the spraying device (9) through the secondary filtering device (7) and the fourth conveying pipe (8); the outlet end of the third conveying pipe (6) is connected to the secondary filtering device (7), the inlet end of the fourth conveying pipe (8) is connected to the secondary filtering device (7), and the outlet end of the fourth conveying pipe (8) is connected to the spraying device (9).

3. The paint recycling system of claim 1, wherein, The primary filtering device (3) comprises a box body (31) and a filter (32), the box body (31) has a receiving cavity (313), the filter (32) is arranged in the receiving cavity (313) and connected to the inner wall of the receiving cavity (313), the filter (32) divides the receiving cavity (313) into a feeding area (3131) and a liquid outlet area (3132), the feeding port (311) is arranged on the box body (31) and connected to the feeding area (3131), and the first liquid outlet (312) is arranged on the box body (31) and connected to the liquid outlet area (3132).

4. The paint recovery system of claim 3, wherein, The filter (32) comprises a frame (321) connected to the inner wall of the receiving cavity (313) and a filter screen (322) connected to the frame (321).

5. The paint recovery system of claim 4, wherein, The box body (31) further has a waste cavity (314) connected to the feeding area (3131), and the box body (31) is provided with a waste discharge port (315) connected to the waste cavity (314).

6. The paint recycling system of claim 5, wherein, The filter screen (322) is arranged to be inclined relative to the direction of gravity (Z), the lower end of the filter screen (322) is close to the waste cavity (314), and the upper end of the filter screen (322) is away from the waste cavity (314).

7. The paint recovery system of claim 6, wherein, An inclination angle of the filter screen (322) relative to the gravity direction (Z) is a, and the following is met: 15°≤a≤75°.

8. The paint recycling system of claim 5, wherein, The number of the filter screens (322) is multiple, and the multiple filter screens (322) are arranged in sequence along the flow direction of the liquid in the accommodating cavity (313). The mesh number of the multiple filter screens (322) gradually increases along the flow direction of the liquid in the accommodating cavity (313).

9. The paint recovery system of claim 8, wherein, An intercepting area (3133) is formed between two adjacent filter screens (322), and the intercepting area (3133) is connected with the waste cavity (314).

10. The paint recycling system of claim 1, wherein, The stirring kettle (5) comprises a kettle body (51), a stirring rod (52), stirring blades (53), and a stirring motor (54). The kettle body (51) has an accommodating cavity (513). The liquid inlet (511) is arranged on the kettle body (51) and is connected with the accommodating cavity (513). The second liquid outlet (512) is arranged on the kettle body (51) and is connected with the accommodating cavity (513). The stirring rod (52) is arranged in the accommodating cavity (513). The stirring blades (53) are connected with the stirring rod (52) and are arranged in the accommodating cavity (513). The stirring motor (54) is arranged outside the kettle body (51). The stirring motor (54) is connected with the stirring rod (52). The stirring motor (54) can drive the stirring rod (52) to rotate around the central axis of the stirring rod (52), so that the stirring rod (52) drives the stirring blades (53) to stir the paint in the accommodating cavity (513).

Images