High-precision reversing valve and intelligent color mixer

Abstract

The high-precision reversing valve comprises a valve body assembly and a valve element assembly, the valve body assembly comprises a valve element pipeline part, a feeding pipeline part, a first pressure pump pipeline part and a second pressure pump pipeline part, and a large-flow channel, a small-flow channel and a feeding channel are formed in the valve element assembly; and in the small discharging state, the small flow channel is communicated with the second pressure pump pipeline piece and the discharging port, and the feeding channel is communicated with the first pressure pump pipeline piece and the feeding pipeline piece. When small-flow discharging is carried out, the actual discharging amount completely comes from paint in the second pressure pump pipeline piece, accurate control over the discharging amount is facilitated, meanwhile, no matter large-flow discharging or small-flow discharging is carried out, paint in the other pressure pump pipeline piece and the valve element pipeline piece can flow back into the feeding pipeline piece synchronously, and therefore the working efficiency is improved. And the coating fully flows, so that the coating is prevented from being solidified, and the discharging precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of intelligent color matching technology, specifically to a high-precision reversing valve and an intelligent color matching machine. Background Technology

[0002] Paint is a coating applied to the surface of an object to be protected or decorated, forming a continuous film that adheres firmly to the object. It is usually a viscous liquid made of resin, oil, or emulsion as the main component, with added pigments, fillers, and appropriate additives, and formulated with organic solvents or water. It has good applications in the automotive, construction, furniture, printing, textile, and pigment industries.

[0003] Paints typically need to be mixed before use, which means mixing multiple different colors of paint in a certain proportion to obtain the desired color. However, this requires extremely high accuracy in the amount of each color paint mixed in. Currently, most paint mixing processes utilize color mixing machines. These machines employ multiple mixing mechanisms to quantitatively output different colors of paint according to the mixing ratio. These paints are then mixed to obtain the desired color. Existing color mixing machines typically offer three operating modes: high-flow-rate rapid discharge, low-flow-rate precise discharge, and pump suction. The operating mode is switched by rotating a valve core. In pump suction mode, paint is drawn from the storage cylinder into the pump cylinder for subsequent discharge. However, both high-flow-rate rapid discharge and low-flow-rate precise discharge utilize the same paint from the same pump cylinder. Especially in low-flow-rate precise discharge, some paint in the pump cylinder not only needs to be discharged through the low-flow-rate precise channel but also needs to flow back to the storage cylinder through the high-flow-rate rapid channel for pressure relief. This results in the amount of paint reduced in the pump cylinder not equaling the actual discharge volume during low-flow-rate precise discharge. Low discharge control accuracy often leads to color deviations in the mixed paint due to inaccurate discharge volume, severely impacting paint quality. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a high-precision reversing valve and an intelligent color matching machine.

[0005] This application discloses a high-precision reversing valve comprising: a valve body assembly and a valve core assembly. The valve body assembly includes a valve core pipe fitting and a feed pipe fitting, a first pressure pump pipe fitting, and a second pressure pump pipe fitting, which are respectively connected to the valve core pipe fitting. The valve core assembly is rotatably disposed within the valve core pipe fitting. The outlet of the valve core pipe fitting, the pipe port of the first pressure pump pipe fitting, and the pipe port of the second pressure pump pipe fitting are respectively abutted against the rotating surface of the valve core assembly. The valve core assembly has a large flow channel, a small flow channel, and a feed channel. After rotation, the valve core assembly has a large discharge state and a small discharge state. In the large discharge state, the large flow channel is connected to the first pressure pump pipe fitting and the outlet, while the small flow channel is offset from the outlet. In the small discharge state, the small flow channel is connected to the second pressure pump pipe fitting and the outlet, while the feed channel is connected to the first pressure pump pipe fitting and the feed pipe fitting.

[0006] Preferably, the valve core assembly includes a first valve body and a second valve body rotatably disposed within the valve core pipe fitting. The rotating surface of the first valve body abuts against the pipe opening of the first pressure pump pipe fitting, and the rotating surface of the second valve body abuts against the pipe opening and the discharge port of the second pressure pump pipe fitting, respectively. A small flow channel and a feed channel are opened in the second valve body, and a large flow channel is opened in the first valve body and the second valve body. The two ports of the large flow channel are respectively opened on the rotating surfaces of the first valve body and the second valve body.

[0007] Preferably, the valve core assembly is also provided with a pressure relief channel; under the large discharge condition, the pressure relief channel is connected to the second pressure pump pipe fitting and the valve core pipe fitting respectively.

[0008] Preferably, the feeding channel has a first feeding port, a second feeding port, and a third feeding port; the rotated valve core assembly also has a feeding state, wherein in the feeding state, the first feeding port is connected to the valve core pipe fitting or to the feeding pipe fitting, the second feeding port is connected to the first pressure pump pipe fitting, the third feeding port is connected to the second pressure pump pipe fitting, and the large flow channel and the small flow channel are both staggered from the discharge port.

[0009] Preferably, the feeding channel also has a fourth feeding port; in the small discharge state, the fourth feeding port is connected to the first pressure pump pipe fitting, and the first feeding port is connected to the valve core pipe fitting or the feeding pipe fitting.

[0010] Preferably, the high-flow channel has a first high-flow port and a second high-flow port; under high-discharge conditions, the first high-flow port is connected to the first pressure pump pipe fitting, the second high-flow port is connected to the discharge port, and the pipe opening of the first pressure pump pipe fitting, the first high-flow port, the second high-flow port and the discharge port are not on the same straight line.

[0011] Preferably, the low-flow channel has a first low-flow port and a second low-flow port; in the low-discharge state, the first low-flow port is connected to the second pressure pump pipe fitting, the second low-flow port is connected to the discharge port, and the pipe opening of the second pressure pump pipe fitting, the first low-flow port, the second low-flow port and the discharge port are on the same straight line.

[0012] Preferably, the first valve body and the second valve body are integrally formed and both are ball valves.

[0013] Preferably, the high-flow channel, low-flow channel, and feed channel are not interconnected.

[0014] This application also discloses an intelligent color mixing machine, including a high-precision reversing valve.

[0015] The beneficial effects of this application are as follows: the discharge state is switched by rotating the valve core assembly. After rotation, the valve core assembly has three discharge states: large discharge state, small discharge state, and feeding state. That is, this application can respectively perform large-flow rapid discharge and small-flow precise discharge. The corresponding flow channel can be selected for discharge according to actual production needs, thereby improving production efficiency and broadening application scenarios. Specifically, when performing large-flow rapid discharge, the coating in the first pressure pump pipe component is discharged through the discharge port via the large-flow channel, while when performing small-flow precise discharge, the coating in the second pressure pump pipe component is discharged through the small-flow channel. The material is discharged from the outlet. Due to the small diameter of the small flow channel, it is beneficial to precisely control the discharge volume of the coating, achieving accurate discharge and ensuring the accuracy of the coating mixing ratio, thus improving the production quality of the mixed coating. Simultaneously, during small-flow precise discharge, the coating in the first pump pipe component flows back into the feed pipe component through the feed channel to achieve backflow pressure relief. Since the first and second pump pipe components are independent, the actual discharge volume during small-flow precise discharge originates entirely from the coating in the second pump pipe component, facilitating accurate control of the discharge volume and improving discharge precision. Furthermore, whether performing large-flow rapid discharge or small-flow precise discharge, the coating in the other pump pipe component and the valve core pipe component is simultaneously returned to the feed pipe component and the barrel. This allows the coating in the first, second, and valve core pipe components to flow fully, preventing coating solidification and blockage of the flow channels, and further improving discharge precision. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a schematic diagram of the high-precision directional valve in the embodiment;

[0018] Figure 2 This is another structural schematic diagram of the high-precision directional valve in the embodiment;

[0019] Figure 3 This is a cross-sectional view of the high-precision directional valve in the embodiment;

[0020] Figure 4 This is a schematic diagram of the valve core assembly in the embodiment;

[0021] Figure 5 This is a perspective view of the valve core assembly in the embodiment;

[0022] Figure 6 This is another cross-sectional view of the high-precision directional valve in the embodiment;

[0023] Figure 7 This is a cross-sectional view of the valve core assembly in the feeding state in the embodiment;

[0024] Figure 8 This is a cross-sectional view of the valve core assembly under high flow rate discharge conditions in the embodiment.

[0025] Figure 9 This is a cross-sectional view of the valve core assembly under low flow rate discharge conditions in the embodiment.

[0026] Figure label:

[0027] 1. Valve body assembly; 11. Valve core piping assembly; 111. Discharge port; 12. Feeding piping assembly; 13. First pressure pump piping assembly; 131. First pressure pump piping; 132. First pressure piston; 14. Second pressure pump piping assembly; 141. Second pressure pump piping assembly; 142. Second pressure piston; 2. Valve core assembly; 21. First valve body; 211. Rotating surface; 22. Second valve body; 23. High flow channel; 231. First high flow port; 232. Second high flow port; 24. Low flow channel; 241. First low flow port; 242. Second low flow port; 25. Feeding channel; 251. First feed port; 252. Second feed port; 253. Third feed port; 254. Fourth feed port; 26. Pressure relief channel; 261. First pressure relief port; 262. Second pressure relief port; 27. Rotating handle. Detailed Implementation

[0028] The following drawings disclose several embodiments of this application. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this application. That is, in some embodiments of this application, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0029] It should be noted that all directional indications in the embodiments of this application, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0030] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit this application. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0031] To further understand the content, features, and effects of this application, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0032] Reference Figures 1-3 , Figure 1 This is a schematic diagram of the high-precision directional valve in the embodiment. Figure 2 This is another structural schematic diagram of the high-precision directional valve in the embodiment. Figure 3 The diagram shows a cross-sectional view of the high-precision directional valve in this embodiment. The high-precision directional valve includes a valve body assembly 1 and a valve core assembly 2. The valve body assembly 1 includes a valve core pipe component 11 and an inlet pipe component 12, a first pressure pump pipe component 13, and a second pressure pump pipe component 14, all connected to the valve core pipe component 11. The valve core assembly 2 is rotatably disposed within the valve core pipe component 11. The outlet 111 of the valve core pipe component 11, the pipe opening of the first pressure pump pipe component 13, and the pipe opening of the second pressure pump pipe component 14 are respectively abutted against the rotating surface 211 of the valve core assembly 2. The valve core assembly 2 has a high-flow-rate channel 23, a low-flow-rate channel 24, and an inlet channel 25. The rotated valve core assembly 2 has a high-flow-rate state and a low-flow-rate state. In the high-flow-rate state, the high-flow-rate channel 23 is connected to both the first pressure pump pipe component 13 and the outlet 111, while the low-flow-rate channel 24 is offset from the outlet 11. In the low discharge state, the low flow channel 24 is connected to the second pressure pump pipe fitting 14 and the discharge port 111 respectively, and the feed channel 25 is connected to the first pressure pump pipe fitting 13 and the feed pipe fitting 12 respectively.

[0033] Reference Figure 4 and Figure 5 , Figure 4This is a schematic diagram of the valve core assembly in the embodiment. Figure 5 This is a perspective view of the valve core assembly in this embodiment. The high-precision reversing valve in this embodiment is used to quantitatively dispense paint and mix it to achieve color matching. Specifically, it can be applied to color matching of paints such as automotive touch-up paint and wall painting. The high-precision reversing valve in this embodiment is used in an intelligent color matching machine, and the specific description of the intelligent color matching machine composed of the high-precision reversing valve in this embodiment is also introduced in this embodiment. In specific application, the valve core assembly 2 also includes a rotating handle 27. One end of the rotating handle 27 is embedded in the sliding groove on the side wall of the valve core assembly 2 to achieve a snap-fit ​​with the valve core assembly 2. The other end of the rotating handle 27 extends outward after passing through the valve core pipe fitting 11. The other end of the rotating handle 27 is provided with a rotating handle, which is convenient for connection with the intelligent control mechanism or manual rotation. The valve core assembly 2 can be rotated by rotating the rotating handle. It is understandable that the discharge state is switched by rotating the valve core assembly 2. After rotation, the valve core assembly 2 has two discharge states: large discharge state and small discharge state. That is, this embodiment can perform large-flow rapid discharge and small-flow precise discharge respectively. The corresponding flow channel can be selected for discharge according to actual production needs, thereby improving production efficiency and expanding application scenarios. When performing large-flow rapid discharge, the coating in the first pressure pump pipe component 13 is discharged through the large-flow channel 23 and the discharge port 111. When performing small-flow precise discharge, the coating in the second pressure pump pipe component 14 is discharged through the small-flow channel 24 and the discharge port 111. For discharge, the small diameter of the low-flow channel 24 facilitates precise control of the paint discharge volume, enabling accurate discharge and ensuring the accuracy of the paint mixing ratio, thus improving the production quality of the mixed paint. Simultaneously, during low-flow precise discharge, the paint in the first pressure pump pipe component 13 flows back to the feed pipe component 12 through the feed channel 25 for pressure relief. Since the first pressure pump pipe component 13 and the second pressure pump pipe component 14 are independent, the actual discharge volume during low-flow precise discharge originates entirely from the paint in the second pressure pump pipe component 14, facilitating accurate control of the discharge volume and improving discharge precision. Specifically, the intelligent color mixing machine includes multiple high-precision reversing valves and multiple material cylinders, each connected to a feed pipe component 12. The multiple material cylinders contain various colors of paint. The valve core pipe component 11 is the valve core pipe, and the feed pipe component 12 is the feed pipe.

[0034] Rereference Figure 4 and Figure 5Preferably, the valve core assembly 2 includes a first valve body 21 and a second valve body 22 rotatably disposed within the valve core pipe component 11. The rotating surface 211 of the first valve body 21 abuts against the pipe opening of the first pressure pump pipe component 13, and the rotating surface 211 of the second valve body 22 abuts against the pipe opening and the discharge port 111 of the second pressure pump pipe component 14, respectively. A small flow channel 24 and a feed channel 25 are opened in the second valve body 22, and a large flow channel 23 is opened in the first valve body 21 and the second valve body 22, with the two ends of the large flow channel 23 respectively opened on the rotating surface 211 of the first valve body 21 and the rotating surface 211 of the second valve body 22. In specific applications, the first valve body 21 and the second valve body 22 are integrally formed and are both ball valves. The integral forming of the first valve body 21 and the second valve body 22 allows the first valve body 21 and the second valve body 22 to rotate synchronously when the handle 27 is rotated, improving the synchronicity of the rotation of the first valve body 21 and the second valve body 22. Meanwhile, since both the first valve body 21 and the second valve body 22 are ball valves, compared to traditional column valves, they can fit more tightly with the pipe openings of the first pressure pump pipe fitting 13, the second pressure pump pipe fitting 14, and the discharge port 111, improving sealing performance, preventing paint leakage during the discharge process, and further improving the accuracy of discharge. Of course, in other embodiments, the first valve body 21 and the second valve body 22 can also be integrally formed column valves, which is not limited here.

[0035] Reference Figure 6 , Figure 6This is another cross-sectional view of the high-precision reversing valve in the embodiment. Preferably, the valve core assembly 2 also has a pressure relief channel 26. Under the large discharge state, the pressure relief channel 26 is connected to the second pressure pump pipe component 14 and the valve core pipe component 11 respectively. In specific applications, in this embodiment, the pressure relief channel 26 has a first pressure relief port 261 and a second pressure relief port 262. It can be understood that the first pressure relief port 261 is opened on the rotating surface 211 of the second valve body 22, and the second pressure relief port 262 is opened on the side surface 212 of the second valve body 22. When in high-flow mode, the high-flow channel 23 is connected to the first pump pipe fitting 13 and the discharge port 111. The coating in the first pump pipe fitting 13 can be discharged quickly and at a high flow rate through the high-flow channel 23 and the discharge port 111. The low-flow channel 24 is closed by the valve core pipe fitting 11, meaning that the low-flow channel 24 is staggered from the second pump pipe fitting 14 and the discharge port 111. The pipe opening of the second pump pipe fitting 14 is connected to the first pressure relief port 261, and the second pressure relief port 262 is connected to the valve core pipe fitting 11. At this time, the coating in the second pump pipe fitting 14 can flow into the valve core pipe fitting 11 through the pressure relief channel 26, and then further flow back from the valve core pipe fitting 11 to the feed pipe fitting 12 to achieve backflow pressure relief. In short, whether performing high-flow rapid discharge or low-flow precise discharge, the coating in the other pump pipe fitting and the valve core pipe fitting 11 will be simultaneously returned to the feed pipe fitting 12 and the barrel. Specifically, the first pressure pump pipe component 13 includes a first pressure pump pipe 131 and a first pressure piston 132. The pipe opening of the first pressure pump pipe 131 abuts against the rotating surface 211 of the first valve body 21. One end of the first pressure piston 132 is movably disposed in the first pressure pump pipe 131 for pressing the paint in the first pressure pump pipe 131 toward the first valve body 21 or for drawing the paint in the feed pipe component 12 into the first pressure pump pipe 131 through the first valve body 21. The other end of the first pressure piston 132 extends outward after passing through the first pressure pump pipe 131. The second pressure pump pipe component 14 includes a second pressure pump pipe 141141 and a second pressure piston 142. The pipe opening of the second pressure pump pipe 141 abuts against the rotating surface 211 of the second valve body 22. One end of the second pressure piston 142 is movably disposed in the second pressure pump pipe 141 for pressing the paint in the second pressure pump pipe 141 against the second valve body 22 or for drawing the paint in the feed pipe component 12 into the second pressure pump pipe 141 through the second valve body 22. The other end of the second pressure piston 142 extends outward after passing through the second pressure pump pipe 141.Furthermore, the first pressure pump pipe component 13 also includes a linkage block and a lifting drive module. The linkage block is connected to the other end of the first pressure piston 132 and the other end of the second pressure piston 142, respectively. The drive end of the lifting drive module is connected to the linkage block. The lifting drive module is used to drive the linkage block to rise and fall, thereby driving the first pressure piston 132 and the second pressure piston 142 to rise and fall synchronously to press or suck up material. That is, when the first pressure piston 132 descends to press material for a large flow and rapid discharge, the second pressure piston 142 also descends synchronously to remove the coating material in the second pressure pump pipe 141. The coating is forced back into the feed pipe fitting 12 to achieve reflux. Similarly, when the second pressure piston 142 descends to press the coating for precise discharge at a small flow rate, the first pressure piston 132 also descends simultaneously to press the coating in the first pressure pump pipe 131 back into the feed pipe fitting 12 to achieve reflux. Since the coating is prone to solidification if left to stand for a long time, it will become viscous and affect the accuracy of the next discharge. This allows the coating in the first pressure pump pipe 131, the second pressure pump pipe 141 and the valve core pipe fitting 11 to flow fully, avoiding the coating from solidifying and causing blockage inside the flow channel, and improving the accuracy of the discharge.

[0036] Rereference Figures 4-6 Preferably, the feed channel 25 has a first feed port 251, a second feed port 252, and a third feed port 253. The rotated valve core assembly 2 also has a feeding state, wherein in the feeding state, the first feed port 251 is connected to the valve core pipe component 11 or the feed pipe component 12, the second feed port 252 is connected to the first pressure pump pipe component 13, the third feed port 253 is connected to the second pressure pump pipe component 14, and the high flow channel 23 and the low flow channel 24 are both staggered from the discharge port 111. In specific applications, the first feed port 251 is located on the side surface 212 of the first valve body 21, the second feed port 252 is located on the rotating surface 211 of the first valve body 21, and the third feed port 253 is located on the rotating surface 211 of the second valve body 22. It can be understood that in the feeding state, the lifting drive module drives the first pressing piston 132 and the second pressing piston 142 to rise simultaneously through the linkage block. The paint in the barrel enters the valve core pipe 11 after passing through the feed pipe 12. The paint in the valve core pipe 11 enters the feed channel 25 through the first feed port 251. The paint in the feed channel 25 is drawn into the first pressure pump pipe 131 and the second pressure pump pipe 141 through the second feed port 252 and the third feed port 253, respectively. That is, the first pressure pump pipe 131 and the second pressure pump pipe 141 are fed at the same time.

[0037] Rereference Figures 4-6Preferably, the feed channel 25 also has a fourth feed port 254. In the low discharge state, the fourth feed port 254 is connected to the first pressure pump pipe fitting 13, and the first feed port 251 is connected to the valve core pipe fitting 11 or the feed pipe fitting 12. In specific applications, the fourth feed port 254 is located on the rotating surface 211 of the first valve body 21. It can be understood that in the low discharge state, the feed channel 25 is equivalent to the pressure relief channel of the coating in the first pressure pump pipe fitting 131. The first pressing piston 132 descends to press the coating in the first pressure pump pipe fitting 131. The coating in the first pressure pump pipe fitting 131 flows sequentially through the pipe opening of the first pressure pump pipe fitting 131, the fourth feed port 254, the feed channel 25, the first feed port 251, the valve core pipe fitting 11, and the feed pipe fitting 12 before flowing back into the barrel to achieve pressure relief and return.

[0038] Rereference Figure 4 and Figure 5 Preferably, the high-flow-rate channel 23 has a first high-flow-rate port 231 and a second high-flow-rate port 232. In the high-discharge state, the first high-flow-rate port 231 is connected to the first pump pipe fitting 13, and the second high-flow-rate port 232 is connected to the discharge port 111. Furthermore, the pipe opening of the first pump pipe fitting 13, the first high-flow-rate port 231, the second high-flow-rate port 232, and the discharge port 111 are not on the same straight line. In specific applications, the first high-flow-rate port 231 is located on the rotating surface 211 of the first valve body 21, and the second high-flow-rate port 232 is located on the rotating surface 211 of the second valve body 22. Since the high-flow-rate channel 23 is used for high-flow-rate rapid discharge, its port diameter is relatively large. By setting the pipe opening of the first pump pipe fitting 13, the first high-flow-rate port 231, the second high-flow-rate port 232, and the discharge port 111 to be non-linear, accidental dripping of paint within the high-flow-rate channel 23 during discharge is reduced.

[0039] Rereference Figures 4-6 Preferably, the low-flow channel 24 has a first low-flow port 241 and a second low-flow port 242. In the low-discharge state, the first low-flow port 241 is connected to the second pump pipe fitting 14, and the second low-flow port 242 is connected to the discharge port 111. The pipe opening of the second pump pipe fitting 14, the first low-flow port 241, the second low-flow port 242, and the discharge port 111 are all on the same straight line. In specific applications, the first low-flow port 241 and the second low-flow port 242 are respectively located at opposite ends of the rotating surface 211 of the second valve body 22, and the diameter of the second low-flow port 242 is smaller than the diameter of the first low-flow port 241. The smaller diameter of the second low-flow port 242 facilitates precise control of the paint discharge rate, enabling accurate discharge and ensuring the accuracy of the paint mixing ratio.

[0040] It should be noted that in this embodiment, there are gaps between the first valve body 21 and the second valve body 22 and the inner wall of the valve core pipe fitting 11. However, the rotating surface 211 of the first valve body 21 abuts against the pipe opening of the first pressure pump pipe 131, and the rotating surface 211 of the second valve body 22 abuts against the second pressure pump pipe 141 and the discharge port 111 respectively. Furthermore, there is also a gap between the side surface 212 of the first valve body 21 and the pipe opening of the feed pipe fitting 12. In other words, the valve core pipe fitting 11 is always connected to the feed pipe fitting 12. Ports not connected to the pipe openings of the first pressure pump pipe 131, the second pressure pump pipe 141, and the discharge port 111 are all connected to the valve core pipe fitting 11. The side surface 212 faces the inlet of the feed pipe fitting 12. In this feeding state, the coating material can directly enter the valve core pipe fitting 11 from the feed pipe fitting 12, increasing the amount of coating material fed per unit time and improving feeding efficiency. Furthermore, during the feeding process, in addition to entering the first pressure pump pipe 131 and the second pressure pump pipe 141 through the feed channel 25, the coating material in the valve core pipe fitting 11, the high-flow channel 23, the low-flow channel 24, and the pressure relief channel 26 also flows due to the feeding process. This ensures that the coating material in the valve core pipe fitting 11 and the valve core assembly 2 remains in a flowing state, preventing the coating material from solidifying and becoming viscous due to prolonged static storage, which would affect the accuracy of the next discharge. Similarly, when performing high-flow rapid discharge and low-flow precise discharge, the coating material in the valve core pipe fitting 11 and the valve core assembly 2 is also in a flowing state, further improving the accuracy of the discharge. Of course, in other embodiments, the side surface 212 of the first valve body 21 may abut against the pipe opening of the feed pipe fitting 12, and the first valve body 21 and the second valve body 22 may fit against the inner wall of the valve core pipe fitting 11, which is not limited here.

[0041] Rereference Figures 4-6 Preferably, the high-flow-rate channel 23, the low-flow-rate channel 24, and the feed channel 25 are not interconnected. It is understood that in this embodiment, the high-flow-rate channel 23, the low-flow-rate channel 24, the feed channel 25, and the pressure relief channel are all located within the valve core assembly 2, and all four channels are independent flow paths. Compared to traditional valve cores where the channels are interconnected, this embodiment ensures that the four channels do not affect each other during operation of the valve core assembly 2, facilitating control of the paint output, ensuring the controllability of the paint output, and improving the accuracy of the output. Especially when performing precise low-flow output, the pressed paint originates from the second pressure pump pipe 141 and flows only within the low-flow-rate channel 24, further improving the accuracy of paint output control.

[0042] Reference Figure 7 , Figure 7This is a cross-sectional view of the valve core assembly in the feeding state of this embodiment. The high-precision reversing valve in this embodiment has three working states: feeding state, large flow discharge state, and small flow discharge state. In the feeding state: by rotating the handle 27, the valve core assembly 2 is rotated, so that the first feeding port 251 is connected to the feeding pipe 12, the second feeding port 252 is connected to the first pressure pump pipe 131, and the third feeding port 253 is connected to the second pressure pump pipe 141. The small flow channel 24 and the large flow channel 23 are both staggered from the discharge port. The lifting drive module drives the first pressure piston 132 and the second pressure piston 142 to rise synchronously through the linkage block to extract the material. The paint is extracted from the barrel and flows sequentially through the feeding pipe 12, the valve core pipe 11, the first feeding port 251, and the feeding channel 25. Then, it splits into two paths and enters the first pressure pump pipe 131 and the second pressure pump pipe 141 through the second feeding port 252 and the third feeding port 253, respectively.

[0043] Reference Figure 8 , Figure 8 This is a cross-sectional view of the valve core assembly in the high-flow-rate discharge state of the embodiment. When the coating in the first pressure pump pipe 131 and the second pressure pump pipe 141 reaches a certain amount, the valve core assembly 2 can be rotated to switch to the high-flow-rate discharge state or the low-flow-rate discharge state. In the high-flow-rate discharge state: the valve core assembly 2 is rotated by rotating the handle 27, so that the first high-flow-rate port 231 is connected to the first pressure pump pipe 131, the second high-flow-rate port 232 is connected to the discharge port 111, the low-flow-rate channel 24 is offset from the discharge port 111, the first pressure relief port 261 is connected to the second pressure pump pipe 141, and the second pressure relief port 262 is connected to the valve core pipe component 11. The lifting drive module drives the first pressing piston 132 and the second pressing piston 142 to descend synchronously via a linkage block to press material. The first pressing piston 132 descends to press the coating material in the first pressure pump pipe 131. The coating material in the first pressure pump pipe 131 flows sequentially through the pipe opening of the first pressure pump pipe 131, the first high-flow port 231, the high-flow channel 23, the second high-flow port 232, and the discharge port 111 for rapid high-flow discharge. Simultaneously, the second pressing piston 142 descends to press the coating material in the second pressure pump pipe 141. The coating material in the second pressure pump pipe 141 flows sequentially through the pipe opening of the second pressure pump pipe 141, the first pressure relief port 261, the pressure relief channel 26, the second pressure relief port 262, the valve core pipe fitting 11, and the feed pipe fitting 12 before flowing back into the material cylinder to achieve pressure relief and return.

[0044] Reference Figure 9 , Figure 9This is a cross-sectional view of the valve core assembly in the low-flow discharge state of the embodiment. In the low-flow discharge state: the valve core assembly 2 is rotated by rotating handle 27, so that the first low-flow port 241 is connected to the second pressure pump pipe 141, the second low-flow port 242 is connected to the discharge port 111, the fourth feed port 254 is connected to the first pressure pump pipe 131, and the first feed port 251 is connected to the valve core pipe component 11. The lifting drive module drives the first pressing piston 132 and the second pressing piston 142 to descend synchronously for pressing material through the linkage block. The second pressing piston 142 descends to press the coating in the second pressure pump pipe 141. The coating in the second pressure pump pipe 141 flows sequentially through the pipe opening of the second pressure pump pipe 141, the first low-flow port 241, the low-flow channel 24, the second low-flow port 242, and the discharge port 111 for precise low-flow discharge. At the same time, the first pressing piston 132 descends to press the coating material in the first pressure pump pipe 131. The coating material in the first pressure pump pipe 131 flows sequentially through the pipe opening of the first pressure pump pipe 131, the fourth feed port 254, the feed channel 25, the first feed port 251, the valve core pipe fitting 11, and the feed pipe fitting 12 before flowing back into the material cylinder to achieve pressure relief and return.

[0045] In summary, the discharge state is switched by rotating the valve core assembly 2. After rotation, the valve core assembly 2 has three discharge states: large discharge state, small discharge state, and feeding state. That is, this embodiment can perform large-flow rapid discharge and small-flow precise discharge respectively. The corresponding flow channel can be selected for discharge according to actual production needs, thereby improving production efficiency and broadening application scenarios. Specifically, when performing large-flow rapid discharge, the coating in the first pressure pump pipe component 13 is discharged through the large-flow channel 23 and the discharge port 111. When performing small-flow precise discharge, the coating in the second pressure pump pipe component 14 is discharged through the small-flow channel 24 and the discharge port 111. During discharge, the small diameter of the low-flow channel 24 facilitates precise control of the coating discharge volume, enabling accurate discharge and ensuring the accuracy of the coating mixing ratio, thus improving the production quality of the mixed coating. Simultaneously, during low-flow precise discharge, the coating in the first pump pipe component 13 flows back to the feed pipe component 12 through the feed channel 25 for pressure relief. Since the first pump pipe component 13 and the second pump pipe component 14 are independent, the actual discharge volume during low-flow precise discharge originates entirely from the coating in the second pump pipe component 14, facilitating accurate control of the discharge volume and improving discharge precision. Furthermore, whether performing high-flow rapid discharge or low-flow precise discharge, the coating in the other pump pipe component and the valve core pipe component 11 is simultaneously returned to the feed pipe component 12 and the barrel. This allows the coating in the first pump pipe component 13, the second pump pipe component 14, and the valve core pipe component 11 to flow fully, preventing coating solidification and internal blockage, and further improving discharge precision.

[0046] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A high-precision directional control valve, characterized in that, include: The valve body assembly (1) and the valve core assembly (2) are provided. The valve body assembly (1) includes a valve core pipe fitting (11) and a feed pipe fitting (12), a first pressure pump pipe fitting (13), and a second pressure pump pipe fitting (14) respectively connected to the valve core pipe fitting (11). The valve core assembly (2) is rotatably disposed inside the valve core pipe fitting (11). The valve core pipe fitting (111) has a discharge port (111), the first pressure pump pipe fitting (13) has a pipe opening, and the second pressure pump pipe fitting (14) has a pipe opening. The openings respectively abut against the rotating surface (211) of the valve core assembly (2). The valve core assembly (2) is provided with a large flow channel (23), a small flow channel (24) and a feed channel (25). After rotation, the valve core assembly (2) has a large discharge state and a small discharge state. In the large discharge state, the large flow channel (23) is connected to the first pressure pump pipe fitting (13) and the discharge port (111) respectively, and the small flow channel (24) is offset from the discharge port (111). In the low discharge state, the low flow channel (24) is connected to the second pressure pump pipe fitting (14) and the discharge port (111) respectively, and the feed channel (25) is connected to the first pressure pump pipe fitting (13) and the feed pipe fitting (12) respectively.

2. The high-precision directional valve according to claim 1, characterized in that, The valve core assembly (2) includes a first valve body (21) and a second valve body (22) rotatably disposed within the valve core pipe fitting (11). The rotating surface (211) of the first valve body (21) abuts against the pipe opening of the first pressure pump pipe fitting (13). The rotating surface (211) of the second valve body (22) abuts against the pipe opening of the second pressure pump pipe fitting (14) and the discharge port (111), respectively. The small flow channel (24) and the feed channel (25) are opened in the second valve body (22). The large flow channel (23) is opened in the first valve body (21) and the second valve body (22), and the two ports of the large flow channel (23) are opened in the rotating surface (211) of the first valve body (21) and the rotating surface (211) of the second valve body (22), respectively.

3. The high-precision directional valve according to claim 1, characterized in that, The valve core assembly (2) is also provided with a pressure relief channel (26); under the large discharge state, the pressure relief channel (26) is connected to the second pressure pump pipe fitting (14) and the valve core pipe fitting (11) respectively.

4. The high-precision directional valve according to claim 1, characterized in that, The feeding channel (25) has a first feeding port (251), a second feeding port (252) and a third feeding port (253); the valve core assembly (2) after rotation also has a feeding state, wherein in the feeding state, the first feeding port (251) is connected to the valve core pipe fitting (11) or the feeding pipe fitting (12), the second feeding port (252) is connected to the first pressure pump pipe fitting (13), the third feeding port (253) is connected to the second pressure pump pipe fitting (14), and the large flow channel (23) and the small flow channel (24) are both offset from the discharge port (111).

5. The high-precision directional valve according to claim 4, characterized in that, The feeding channel (25) also has a fourth feeding port (254); in the small discharge state, the fourth feeding port (254) is connected to the first pressure pump pipe fitting (13), and the first feeding port (251) is connected to the valve core pipe fitting (11) or the feeding pipe fitting (12).

6. The high-precision directional valve according to claim 1, characterized in that, The high-flow channel (23) has a first high-flow port (231) and a second high-flow port (232). Under high discharge conditions, the first high-flow port (231) is connected to the first pressure pump pipe fitting (13), and the second high-flow port (232) is connected to the discharge port (111). The pipe opening of the first pressure pump pipe fitting (13), the first high-flow port (231), the second high-flow port (232) and the discharge port (111) are not on the same straight line.

7. The high-precision directional valve according to claim 1, characterized in that, The low-flow channel (24) has a first low-flow port (241) and a second low-flow port (242); In the low discharge state, the first low flow port (241) is connected to the second pressure pump pipe fitting (14), the second low flow port (242) is connected to the discharge port (111), and the pipe opening of the second pressure pump pipe fitting (14), the first low flow port (241), the second low flow port (242) and the discharge port (111) are on the same straight line.

8. The high-precision directional valve according to claim 2, characterized in that, The first valve body (21) and the second valve body (22) are integrally formed and are both ball valves.

9. The high-precision directional valve according to claim 1, characterized in that, The high-flow channel (23), the low-flow channel (24), and the feed channel (25) are not interconnected.

10. An intelligent color mixing machine, characterized in that, Including the high-precision directional valve as described in any one of claims 1-9.

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