Paint supply device

Abstract

The invention provides a paint supply device which comprises a raw material feeding pipe, the raw material feeding pipe is connected with a paint supply pump mechanism, the paint supply pump mechanism is connected with a paint conveying pipe, the paint conveying pipe is connected with a paint box, an outer box is arranged outside the paint box, a circulating pump mechanism is arranged in the paint box, and the circulating pump mechanism is connected with the outer box. And the circulating pump mechanism is connected with the filtering mechanism through a pipeline, the filtering mechanism is connected with the connecting pipe, and a redundant paint recycling mechanism is arranged above the paint box. By arranging the redundant paint recycling mechanism, unused redundant paint flowing out can return to the paint box again after being filtered, cyclic utilization of paint is achieved, waste is reduced, cost is reduced, stable supply and circulation of the paint can be ensured by arranging the paint supply pump mechanism and the circulating pump mechanism, and the paint recycling efficiency is improved. The paint is kept in a good flowing state in the system, and the paint supply efficiency and stability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of paint supply, and in particular to a paint supply device. Background Art

[0002] In the coating industry, the paint supply device is one of the key equipment to ensure the quality and efficiency of coating. The paint supply device proposed in Chinese invention patent application number: CN202111392171.X includes a first paint bucket and a second paint bucket, a paint extraction structure is arranged between the first paint bucket and the second paint bucket, and a paint supply pipe and an overflow pipe are arranged in parallel on the second paint bucket, and the insulating paint in the paint supply pipe and the overflow pipe flows into the machine. The present invention provides a paint supply device that uses a pneumatic pump to automatically draw the insulating paint in the paint bucket into a fixed paint bucket, so as to achieve the purpose of sustainable paint supply without disassembling the quick connector.

[0003] However, the existing paint supply devices have some shortcomings during use and still need to be improved. In terms of paint quality, traditional paint supply devices often lack an effective filtration system, which leads to the inability to fully remove impurities, odors and harmful substances in the paint, thereby affecting the coating effect and the service life of the paint.

[0004] In terms of paint resource utilization, the existing paint supply devices are not perfect in handling excess paint, and a large amount of unused paint is directly discarded, causing serious waste and increasing production costs.

[0005] In terms of maintaining paint performance, many paint supply devices do not take into account the thermal insulation of paint. Paint is easily affected by temperature changes during storage and transportation, resulting in a decrease in its performance and affecting the quality of coating.

[0006] In terms of paint supply stability, the paint supply and circulation systems of some paint supply devices are not stable enough, which may easily lead to discontinuous paint supply or poor flow, affecting production efficiency.

[0007] In terms of device mobility, existing paint supply devices are often bulky and inconvenient to move, which limits their application in different work scenarios.

[0008] In terms of liquid level monitoring, some paint supply devices lack liquid level meters or have imperfect liquid level monitoring systems, so operators cannot timely and accurately understand the liquid level of paint and related liquids, which brings inconvenience to production. Therefore, we have made improvements to this and proposed a paint supply device. Summary of the invention

[0009] The purpose of the present invention is to address the problems raised by the existing background technology. In order to achieve the above invention purpose, the present invention provides the following technical solutions: a paint supply device, including a raw material feed pipe, the raw material feed pipe is connected to a paint supply pump mechanism, the paint supply pump mechanism is connected to a paint delivery pipe, the paint delivery pipe is connected to a paint box, an outer box is provided outside the paint box, a circulation pump mechanism is provided inside the paint box, the circulation pump mechanism is connected to a filter mechanism through a pipeline, the filter mechanism is connected to a connecting pipe, one end of the connecting pipe is connected to a paint overflow return pipe, the other end of the connecting pipe is connected to an output pipe, an output pipe connector is provided at the end of the output pipe, an output pipe valve is provided on the output pipe connector, and an excess paint circulation recovery mechanism is provided above the paint box.

[0010] As a preferred technical solution of the present invention, the paint supply pump mechanism is provided with a paint supply motor, the paint supply motor is connected to the paint supply rotating shaft, the paint supply rotating shaft is connected to the driving belt hub, the driving belt hub is connected to the driven belt hub through a conveyor belt, and the rotating shaft of the driven belt hub is connected to the paint extraction gear pump.

[0011] As a preferred technical solution of the present invention, the circulating pump mechanism is provided with a circulating motor, the circulating motor is connected to the circulating rotating shaft, the circulating rotating shaft is connected to the circulating gear pump, and the circulating gear pump is provided with a circulating paint inlet pipe and a circulating paint outlet pipe.

[0012] As a preferred technical solution of the present invention, the filtering mechanism is provided with a filter tank, a filter fiber screen is provided in the filter tank, an activated carbon filter sheet is provided below the filter fiber screen, a reverse osmosis membrane sheet is provided below the activated carbon filter sheet, and a sponge filter layer is provided below the reverse osmosis membrane sheet.

[0013] As a preferred technical solution of the present invention, the excess paint circulation recovery mechanism is provided with an excess paint circulation recovery pipe, the excess paint circulation recovery pipe is connected to the filter box, a filter screen is provided in the filter box, a circulation recovery delivery pipe is provided at the lower end of the filter box, and the circulation recovery delivery pipe is connected to the paint box.

[0014] As a preferred technical solution of the present invention, a heat-insulating layer is provided inside the outer box, and liquid level gauges are provided on the paint box and the outer box.

[0015] As a preferred technical solution of the present invention, a base is arranged below the outer box, a wheel frame is arranged below the base, and movable wheels are arranged on the wheel frame.

[0016] A paint supply method for a paint supply device comprises the following steps:

[0017] Step 1. Start the paint supply pump mechanism: turn on the paint supply motor, the paint supply motor drives the paint supply rotating shaft to rotate, the paint supply rotating shaft drives the active belt wheel hub to rotate, and the driven belt wheel hub is driven to rotate through the conveyor belt, thereby making the paint extraction gear pump work; the raw material enters the paint extraction gear pump through the raw material feed pipe and is pumped to the paint delivery pipe;

[0018] Step 2. Paint delivery: The paint enters the paint box through the paint delivery pipe;

[0019] Step 3. Paint box circulation: start the circulation pump mechanism, the circulation motor drives the circulation rotating shaft to rotate, and the circulation rotating shaft drives the circulation gear pump to work; the paint in the paint box enters the circulation gear pump through the circulation paint inlet pipe, and then enters the filter mechanism through the circulation paint outlet pipe through the pipeline;

[0020] Step 4. Filtration: The paint enters the filter tank of the filtration mechanism and is filtered through the filter fiber filter, activated carbon filter, reverse osmosis membrane and sponge filter layer in sequence;

[0021] Step 5. Diversion: The filtered paint enters the connecting pipe, part of it flows back through the paint overflow return pipe, and the other part enters the output pipe;

[0022] Step 6. Output control: When the paint needs to be output, open the output pipe valve on the output pipe connector, and the paint is output from the end of the output pipe;

[0023] Step 7. Recycling of excess paint: The excess paint that has not been used up enters the filter box through the excess paint recycling pipe, is filtered through the filter net, and returns to the paint box through the recycling delivery pipe.

[0024] As a preferred technical solution of the present invention, step 2. paint delivery: the paint enters the paint box through the paint delivery pipe, an outer box is arranged outside the paint box, and warm water is filled inside the outer box to keep the paint warm.

[0025] As a preferred technical solution of the present invention, the flow formula of the paint extraction gear pump is: Q=n*V; wherein n is the rotation speed and V is the displacement.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: In the scheme of the present invention, through the multiple filtering treatments of the filtering fiber filter, activated carbon filter, reverse osmosis membrane and sponge filter layer in the filtering mechanism, impurities, odors and harmful substances in the paint can be effectively removed, the purity and quality of the paint can be improved, and thus the coating effect can be improved.

[0027] By setting up a surplus paint recycling mechanism, the surplus paint that has flowed out but not used up can be filtered and then returned to the paint box, thus realizing the recycling of paint, reducing waste and lowering costs.

[0028] The warm water in the outer box provides insulation for the paint in the paint box, which helps to maintain the performance of the paint and ensure the stability and reliability of the paint during use.

[0029] The setting of the paint supply pump mechanism and the circulation pump mechanism can ensure the stable supply and circulation of paint, keep the paint in a good flow state in the system, and improve the efficiency and stability of paint supply.

[0030] A base is arranged below the outer box, and movable wheels are arranged on the wheel frame below the base, which facilitates the movement and arrangement of the entire paint supply device and increases the flexibility and operability of the device.

[0031] The flow rate of the paint extraction gear pump can be calculated and controlled by the formula Q=n*V (where n is the speed and V is the displacement), which can achieve precise adjustment of the paint supply to meet different painting requirements.

[0032] Liquid level gauges are installed on the paint box and outer box to facilitate operators to understand the liquid levels of paint and insulation water in real time and to replenish or adjust them in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure provided by the present invention;

[0034] Figure 2 A schematic diagram of the paint overflow return pipe structure provided by the present invention;

[0035] Figure 3 A schematic diagram of the circulation pump mechanism structure provided by the present invention;

[0036] Figure 4 A schematic diagram of the outer box structure provided by the present invention;

[0037] Figure 5 A schematic diagram of the paint supply pump mechanism provided by the present invention;

[0038] Figure 6 A schematic diagram of the structure of the excess paint recycling mechanism provided by the present invention;

[0039] Figure 7 A schematic diagram of the filter structure provided by the present invention;

[0040] Figure 8 A schematic diagram of the paint box structure provided by the present invention;

[0041] Fig. 9 A schematic diagram of the structure of the filtering mechanism provided by the present invention;

[0042] Fig.10 This is a schematic diagram of the main structure provided by the present invention.

[0043] Indicated in the figure:

[0044] 1. Raw material feeding pipe; 2. Paint supply pump mechanism; 201. Paint supply motor; 202. Paint supply rotating shaft; 203. Driving belt wheel hub; 204. Conveyor belt; 205. Driven belt wheel hub; 206. Paint extraction gear pump; 3. Paint conveying pipe; 4. Paint box; 5. Outer box; 501. Insulation layer; 6. Circulation pump mechanism; 601. Circulation motor; 602. Circulation rotating shaft; 603. Circulation gear pump; 6031. Circulation paint inlet pipe; 6032. Circulation paint outlet pipe; 7. Filter mechanism; 701. Filter tank; 702, filter fiber filter; 703, activated carbon filter; 704, reverse osmosis membrane; 705, sponge filter layer; 8, connecting pipe; 801, paint overflow return pipe; 802, output pipeline; 9, output pipe connector; 901, output pipe valve; 10, excess paint recycling mechanism; 101, excess paint recycling pipe; 102, filter box; 103, filter net; 104 recycling delivery pipe; 11, liquid level meter; 12, base; 1201, wheel frame; 1202, moving wheel. DETAILED DESCRIPTION

[0045] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0046] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features and technical solutions in the embodiments can be combined with each other without conflict. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0047] Example 1: Please refer to Figure 1-Figure 10A paint supply device includes a raw material feeding pipe 1, the raw material feeding pipe 1 is connected to a paint supply pump mechanism 2, the paint supply pump mechanism 2 is connected to a paint delivery pipe 3, the paint delivery pipe 3 is connected to a paint box 4, an outer box 5 is arranged outside the paint box 4, a circulating pump mechanism 6 is arranged inside the paint box 4, the circulating pump mechanism 6 is connected to a filtering mechanism 7 through a pipeline, the filtering mechanism 7 is connected to a connecting pipe 8, one end of the connecting pipe 8 is connected to a paint overflow return pipe 801, and the other end of the connecting pipe 8 is connected to an output pipe 802, an output pipe connector 9 is arranged at the end of the output pipe 802, an output pipe valve 901 is arranged on the output pipe connector 9, and an excess paint circulation recovery mechanism 10 is arranged above the paint box 4.

[0048] The paint supply pump mechanism 2 is provided with a paint supply motor 201, which is connected to a paint supply rotating shaft 202, which is connected to a driving belt hub 203, which is connected to a driven belt hub 205 through a conveyor belt 204, and the rotating shaft of the driven belt hub 205 is connected to a paint extraction gear pump 206.

[0049] The circulation pump mechanism 6 is provided with a circulation motor 601 , which is connected to a circulation rotating shaft 602 , which is connected to a circulation gear pump 603 , and the circulation gear pump 603 is provided with a circulation paint inlet pipe 6031 and a circulation paint outlet pipe 6032 .

[0050] The filtering mechanism 7 is provided with a filtering tank 701, a filtering fiber screen 702 is provided in the filtering tank 701, an activated carbon filter sheet 703 is provided below the filtering fiber screen 702, a reverse osmosis membrane sheet 704 is provided below the activated carbon filter sheet 703, and a sponge filtering layer 705 is provided below the reverse osmosis membrane sheet 704.

[0051] The excess paint recycling mechanism 10 is provided with an excess paint recycling pipe 101, which is connected to a filter box 102. A filter screen 103 is provided in the filter box 102. A recycling conveying pipe 104 is provided at the lower end of the filter box 102, and the recycling conveying pipe 104 is connected to the paint box 4.

[0052] A heat-insulating layer 501 is provided inside the outer box 5 , and a liquid level gauge 11 is provided on the paint box 4 and the outer box 5 .

[0053] A base 12 is provided below the outer box 5 , a wheel frame 1201 is provided below the base 12 , and moving wheels 1202 are provided on the wheel frame 1201 .

[0054] Working principle of the paint supply device: First, start the paint supply pump mechanism 2. After the paint supply motor 201 is started, it drives the paint supply rotating shaft 202 to rotate, and then the driving belt wheel hub 203 rotates. Through the transmission of the conveyor belt 204, the driven belt wheel hub 205 rotates accordingly, thereby driving the paint extraction gear pump 206 to work. The raw material enters the paint extraction gear pump 206 from the raw material feed pipe 1. According to the flow formula of the paint extraction gear pump 206 Q = n * V, where n is the speed and V is the displacement, the raw material is quantitatively pumped to the paint delivery pipe 3.

[0055] Then, the paint enters the paint box 4 through the paint delivery pipe 3. In this process, the warm water in the outer box 5 outside the paint box 4 provides heat preservation for the paint, ensuring the performance of the paint.

[0056] Next, the circulation pump mechanism 6 is started. The circulation motor 601 drives the circulation rotating shaft 602 to rotate, thereby operating the circulation gear pump 603. The paint in the paint box 4 enters the circulation gear pump 603 through the circulation paint inlet pipe 6031, and is then transported to the filter mechanism 7 through the circulation paint outlet pipe 6032 through the pipeline.

[0057] In the filtering mechanism 7, after the paint enters the filtering tank 701, it is sequentially filtered through a filter fiber filter 702, an activated carbon filter sheet 703, a reverse osmosis membrane sheet 704 and a sponge filter layer 705 to remove impurities and improve the quality of the paint.

[0058] The filtered paint enters the connecting pipe 8, where it is split. A portion of the paint flows back through the paint overflow return pipe 801, and the other portion enters the output pipe 802.

[0059] When the paint needs to be output, the output pipe valve 901 on the output pipe connector 9 is opened, and the paint is output from the end of the output pipe 802 and can be used for actual painting work.

[0060] In addition, the excess paint that flows out but is not used up enters the filter box 102 through the excess paint recycling pipe 101. After being filtered by the filter screen 103, the paint returns to the paint box 4 through the recycling delivery pipe 104, realizing the recycling of paint and reducing waste.

[0061] Embodiment 2: A paint supply method of a paint supply device, comprising the following steps:

[0062] Step 1. Start the paint supply pump mechanism 2: Turn on the paint supply motor 201, the paint supply motor 201 drives the paint supply rotating shaft 202 to rotate, the paint supply rotating shaft 202 drives the active belt wheel hub 203 to rotate, and drives the driven belt wheel hub 205 to rotate through the conveyor belt 204, thereby making the paint extraction gear pump 206 work; the raw material enters the paint extraction gear pump 206 through the raw material feed pipe 1 and is pumped to the paint delivery pipe 3;

[0063] Step 2. Paint delivery: the paint enters the paint box 4 through the paint delivery pipe 3;

[0064] Step 3. Circulation of the paint box 4: Start the circulation pump mechanism 6, the circulation motor 601 drives the circulation rotating shaft 602 to rotate, and the circulation rotating shaft 602 drives the circulation gear pump 603 to work; the paint in the paint box 4 enters the circulation gear pump 603 through the circulation paint inlet pipe 6031, and then enters the filter mechanism 7 through the circulation paint outlet pipe 6032 through the pipeline;

[0065] Step 4. Filtration: The paint enters the filter tank 701 of the filtration mechanism 7, and is filtered through the filter fiber filter 702, the activated carbon filter sheet 703, the reverse osmosis membrane sheet 704 and the sponge filter layer 705 in sequence;

[0066] Step 5. Dividing: The filtered paint enters the connecting pipe 8, a part of it flows back through the paint overflow return pipe 801, and the other part enters the output pipe 802;

[0067] Step 6. Output control: When the paint needs to be output, the output pipe valve 901 on the output pipe connector 9 is opened, and the paint is output from the end of the output pipe 802;

[0068] Step 7. Recycling of excess paint: The excess paint that has not been used up enters the filter box 102 through the excess paint recycling pipe 101, is filtered by the filter screen 103, and then returns to the paint box 4 through the recycling delivery pipe 104.

[0069] Step 2. Paint transportation: The paint enters the paint box 4 through the paint transportation pipe 3. An outer box 5 is arranged outside the paint box 4. The outer box 5 is filled with warm water to keep the paint warm.

[0070] The flow formula of the paint extraction gear pump 206 is: Q=n*V, wherein n is the rotation speed and V is the displacement.

[0071] Embodiment 3: A paint supply device, the specific technical characteristic parameters are as follows:

[0072] Paint supply motor 201: power is 3kW, speed is 1450r / min.

[0073] Paint pump 206: displacement is 0.1m 3 / min.

[0074] Circulation motor 601: power is 2.2kW, speed is 1430r / min.

[0075] Circulation gear pump 603: displacement is 0.08m 3 / min.

[0076] Filter tank 701: diameter 300mm, height 800mm.

[0077] Outer box 5: The volume is 500L, and the internal warm water temperature is maintained at 40℃.

[0078] Paint box 4: volume is 300L.

[0079] Liquid level meter 11: The measuring range is 0-1000mm.

[0080] Operation process:

[0081] Follow the steps for the paint supply method above.

[0082] In step 1, the paint supply motor 201 runs at a speed of 1450 r / min. According to the flow formula Q=n*V of the paint extraction gear pump 206, the flow rate is Q=1450×0.1=145 L / min.

[0083] In step 3, the circulation motor 601 runs at a rotation speed of 1430 r / min, and the flow rate of the circulation gear pump 603 is Q=1430×0.08=114.4 L / min.

[0084] After the paint is filtered by the filter mechanism 7, it is diverted according to step 5. Assuming that the flow rate of the paint overflow return pipe 801 is 40 L / min, the flow rate entering the output pipe 802 is 74.4 L / min.

[0085] When the paint needs to be output, the output pipe valve 901 is opened, and the paint is output from the end of the output pipe 802 at a flow rate of 74.4 L / min.

[0086] Excess paint enters the filter box 102 through the excess paint circulation recovery pipe 101 for filtration and then returns to the paint box 4 .

[0087] Embodiment 4: A paint supply device, the specific technical characteristic parameters are as follows: Paint supply motor 201: power is 5kW, speed is 1500r / min.

[0088] Paint pump 206: displacement is 0.2m 3 / min.

[0089] Circulation motor 601: power is 3kW, speed is 1500r / min.

[0090] Circulation gear pump 603: displacement is 0.12m 3 / min.

[0091] Filter tank 701: diameter 400mm, height 1000mm.

[0092] Outer box 5: The volume is 800L, and the internal warm water temperature is maintained at 45℃.

[0093] Paint box 4: volume is 500L.

[0094] Liquid level meter 11: The measuring range is 0-1200mm.

[0095] Operation process: Follow the steps of the paint supply method.

[0096] In step 1, the paint supply motor 201 runs at a speed of 1500 r / min, and the flow rate of the paint extraction gear pump 206 is Q=1500×0.2=300 L / min.

[0097] In step 3, the circulation motor 601 runs at a rotation speed of 1500 r / min, and the flow rate of the circulation gear pump 603 is Q=1500×0.12=180 L / min.

[0098] After the paint is filtered, it is divided in step 5. Assuming that the flow rate of the paint overflow return pipe 801 is 60 L / min, the flow rate entering the output pipe 802 is 120 L / min.

[0099] When the paint needs to be output, the output pipe valve 901 is opened, and the paint is output at a flow rate of 120L / min from the end of the output pipe 802. The excess paint enters the filter box 102 through the excess paint recycling pipe 101 and is filtered, and then returns to the paint box 4.

[0100] Specific work flow of the paint supply device:

[0101] 1. Start the paint supply pump mechanism 2

[0102] The paint supply motor 201 is turned on, and the paint supply motor 201 drives the paint supply rotating shaft 202 to rotate.

[0103] The paint supply rotating shaft 202 drives the driving belt wheel hub 203 to rotate, and drives the driven belt wheel hub 205 to rotate through the conveyor belt 204.

[0104] The rotating shaft of the driven pulley hub 205 drives the paint extraction gear pump 206 to work.

[0105] The raw material enters the paint extraction gear pump 206 from the raw material feed pipe 1 , and according to the flow formula of the paint extraction gear pump 206 Q=n*V where n is the rotation speed and V is the displacement, the raw material is quantitatively pumped to the paint delivery pipe 3 .

[0106] 2. Paint delivery

[0107] The paint enters the paint box 4 through the paint delivery pipe 3.

[0108] During this process, the warm water in the outer box 5 keeps the paint in the paint box 4 warm.

[0109] 3. Paint box 4 cycles

[0110] The circulation pump mechanism 6 is started, and the circulation motor 601 drives the circulation rotating shaft 602 to rotate.

[0111] The circulating rotating shaft 602 drives the circulating gear pump 603 to work.

[0112] The paint in the paint box 4 enters the circulating gear pump 603 through the circulating paint inlet pipe 6031 , and then enters the filtering mechanism 7 through the circulating paint outlet pipe 6032 through the pipeline.

[0113] 4. Filter

[0114] The paint enters the filter tank 701 of the filter mechanism 7 .

[0115] The paint passes through the filter fiber screen 702 in sequence to remove larger particle impurities.

[0116] Passing through the activated carbon filter 703, the odor and some harmful substances in the paint are absorbed.

[0117] After passing through the reverse osmosis membrane 704, tiny particles and harmful substances are further removed.

[0118] After passing through the sponge filter layer 705, the final filtering treatment is carried out to improve the purity of the paint.

[0119] 5. Diversion

[0120] The filtered paint enters the connecting pipe 8.

[0121] A portion of the paint flows back through the paint overflow return pipe 801 to maintain the flow and stability of the paint in the system.

[0122] Another portion of the paint enters the output pipe 802.

[0123] 6. Output control

[0124] When the paint needs to be output, the output pipe valve 901 on the output pipe connector 9 is opened.

[0125] The paint is output from the end of the output pipe 802 and can be used for painting and other works.

[0126] 7. Recycling of excess paint

[0127] The excess paint that flows out but is not used up enters the filter box 102 through the excess paint circulation recovery pipe 101.

[0128] The impurities are removed by filtering through the filter screen 103 in the filter box 102.

[0129] The filtered paint is returned to the paint box 4 through the recycling and delivery pipe 104, so that the paint is recycled.

[0130] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A paint supply device, comprising a raw material feeding pipe (1), characterized in that: The raw material feed pipe (1) is connected to a paint supply pump mechanism (2), the paint supply pump mechanism (2) is connected to a paint delivery pipe (3), the paint delivery pipe (3) is connected to a paint box (4), an outer box (5) is provided outside the paint box (4), a circulation pump mechanism (6) is provided inside the paint box (4), the circulation pump mechanism (6) is connected to a filter mechanism (7) through a pipeline, the filter mechanism (7) is connected to a connecting pipe (8), one end of the connecting pipe (8) is connected to a paint overflow return pipe (801), the other end of the connecting pipe (8) is connected to an output pipe (802), an output pipe connector (9) is provided at the end of the output pipe (802), an output pipe valve (901) is provided on the output pipe connector (9), and an excess paint circulation recovery mechanism (10) is provided above the paint box (4).

2. A paint supply device according to claim 1, characterized in that: The paint supply pump mechanism (2) is provided with a paint supply motor (201), the paint supply motor (201) is connected to a paint supply rotating shaft (202), the paint supply rotating shaft (202) is connected to a driving belt hub (203), the driving belt hub (203) is connected to a driven belt hub (205) via a conveyor belt (204), and the rotating shaft of the driven belt hub (205) is connected to a paint extraction gear pump (206).

3. A paint supply device according to claim 1, characterized in that: The circulation pump mechanism (6) is provided with a circulation motor (601), the circulation motor (601) is connected to a circulation rotating shaft (602), the circulation rotating shaft (602) is connected to a circulation gear pump (603), and the circulation gear pump (603) is provided with a circulation paint inlet pipe (6031) and a circulation paint outlet pipe (6032).

4. A paint supply device according to claim 1, characterized in that: The filtering mechanism (7) is provided with a filtering tank (701), a filtering fiber screen (702) is provided in the filtering tank (701), an activated carbon filter sheet (703) is provided below the filtering fiber screen (702), a reverse osmosis membrane sheet (704) is provided below the activated carbon filter sheet (703), and a sponge filtering layer (705) is provided below the reverse osmosis membrane sheet (704).

5. A paint supply device according to claim 1, characterized in that: The excess paint recycling mechanism (10) is provided with an excess paint recycling pipe (101), the excess paint recycling pipe (101) is connected to a filter box (102), a filter screen (103) is provided inside the filter box (102), a recycling conveying pipe (104) is provided at the lower end of the filter box (102), and the recycling conveying pipe (104) is connected to a paint box (4).

6. A paint supply device according to claim 1, characterized in that: A heat-insulating layer (501) is provided inside the outer box (5), and a liquid level meter (11) is provided on the paint box (4) and the outer box (5).

7. A paint supply device according to claim 6, characterized in that: A base (12) is arranged below the outer box (5), a wheel frame (1201) is arranged below the base (12), and moving wheels (1202) are arranged on the wheel frame (1201).

8. A paint supply method for a paint supply device, characterized in that: The following steps are involved: Step 1. Start the paint supply pump mechanism (2): turn on the paint supply motor (201), the paint supply motor (201) drives the paint supply rotating shaft (202) to rotate, the paint supply rotating shaft (202) drives the driving belt wheel hub (203) to rotate, and drives the driven belt wheel hub (205) to rotate through the conveyor belt (204), thereby making the paint extraction gear pump (206) work; the raw material enters the paint extraction gear pump (206) through the raw material feed pipe (1) and is pumped to the paint delivery pipe (3); Step 2. Paint delivery: the paint enters the paint box (4) through the paint delivery pipe (3); Step 3. Circulation of the paint box (4): start the circulation pump mechanism (6), the circulation motor (601) drives the circulation rotating shaft (602) to rotate, and the circulation rotating shaft (602) drives the circulation gear pump (603) to work; the paint in the paint box (4) enters the circulation gear pump (603) through the circulation paint inlet pipe (6031), and then enters the filtering mechanism (7) through the circulation paint outlet pipe (6032) through the pipeline; Step 4. Filtration: The paint enters the filter tank (701) of the filtration mechanism (7), and is filtered through the filter fiber filter (702), the activated carbon filter (703), the reverse osmosis membrane (704) and the sponge filter layer (705) in sequence; Step 5. Splitting: The filtered paint enters the connecting pipe (8), a part of it flows back through the paint overflow return pipe (801), and the other part enters the output pipe (802); Step 6. Output control: When the paint needs to be output, the output pipe valve (901) on the output pipe connector (9) is opened, and the paint is output from the end of the output pipe (802); Step 7. Recycling of excess paint: The excess paint that has not been used up enters the filter box (102) through the excess paint recycling pipe (101), is filtered through the filter screen (103), and then returns to the paint box (4) through the recycling delivery pipe (104).

9. The paint supply method of the paint supply device according to claim 8, characterized in that: Step 2. Paint transportation: The paint enters the paint box (4) through the paint transportation pipe (3). An outer box (5) is arranged outside the paint box (4). The outer box (5) is filled with warm water to keep the paint warm.

10. The paint supply method of the paint supply device according to claim 8, characterized in that: The flow formula of the paint extraction gear pump (206) is: Q=n*V; wherein n is the rotation speed and V is the displacement.

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