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] The present invention relates to the field of intelligent color mixing technology, and in particular to a high-precision reversing valve and an intelligent color mixing machine. Background Art

[0002] Paint is applied to the surface of the object to be protected or decorated, and can form a continuous film that is firmly attached to the coated object. It is usually a viscous liquid made of resin, oil, or emulsion, with pigments, fillers and corresponding additives added, and prepared with organic solvents or water. It has good application scenarios in the fields of automobiles, construction, furniture, printing, textiles and pigments.

[0003] Paints usually need to be mixed before use, that is, a variety of different colors of paint are mixed in a certain proportion to obtain the desired color of paint, but this requires extremely high accuracy in the amount of each color of paint mixed. Nowadays, most paint tinting machines are used for paint tinting. They are equipped with multiple tinting mechanisms to quantitatively output corresponding different colors of paint according to the mixing ratio, and then mix these paints to obtain the required color of paint. Most existing tinting machines have three working modes: large flow and fast discharge, small flow and precise discharge, and pump suction. The working mode is switched by rotating the valve core. When pumping, the paint is sucked from the storage barrel into the material pump barrel for subsequent discharge. However, whether it is large flow and fast discharge or small flow and precise discharge, the paint in the same material pump barrel is used during discharge. In particular, when performing small flow and precise discharge, the paint in the material pump barrel not only needs to be discharged through the small flow and precise channel, but also some of the paint needs to be returned to the storage barrel through the large flow and fast channel to achieve pressure relief. This also leads to the fact that when performing small flow and precise discharge, the reduction in the paint in the material pump barrel is not equal to the actual discharge amount, the discharge control accuracy is low, and the color of the mixed paint is often deviated due to inaccurate discharge amount, which seriously affects the quality of the paint. Summary of the Invention

[0004] In response to the deficiencies in the prior art, the present application provides a high-precision reversing valve and an intelligent color mixing machine.

[0005] A high-precision reversing valve disclosed in the present application includes: a valve body assembly and a valve core assembly, the valve body assembly includes a valve core pipeline member and a feed pipeline member, a first pressure pump pipeline member and a second pressure pump pipeline member respectively connected to the valve core pipeline member, the valve core assembly is rotatably arranged in the valve core pipeline member, the discharge port of the valve core pipeline member, the pipeline port of the first pressure pump pipeline member and the pipeline port of the second pressure pump pipeline member are respectively abutted against the rotating surface of the valve core assembly, and a large flow channel, a small flow channel and a feed channel are opened in the valve core assembly; the valve core assembly after rotation has a large discharge state and a small discharge state, wherein in the large discharge state, the large flow channel is respectively connected to the first pressure pump pipeline member and the discharge port, and the small flow channel is staggered with the discharge port; in the small discharge state, the small flow channel is respectively connected to the second pressure pump pipeline member and the discharge port, and the feed channel is respectively connected to the first pressure pump pipeline member and the feed pipeline member.

[0006] Preferably, the valve core assembly includes a first valve body and a second valve body rotatably arranged in the valve core pipeline member, the rotating surface of the first valve body abuts the pipeline port of the first pressure pump pipeline member, and the rotating surfaces of the second valve body abut the pipeline port and the discharge port of the second pressure pump pipeline member respectively, the small flow channel and the feed channel are opened in the second valve body, the large flow channel is opened in the first valve body and the second valve body, and the two ends of the large flow channel are respectively opened on the rotating surface of the first valve body and the rotating surface of the second valve body.

[0007] Preferably, the valve core assembly is further provided with a pressure relief channel; in the large discharge state, the pressure relief channel is communicated with the second pressure pump pipeline and the valve core pipeline respectively.

[0008] Preferably, the feed channel has a first feed port, a second feed port and a third feed port; the valve core assembly after rotation also has a feeding state, wherein in the feeding state, the first feed port is connected to the valve core pipeline member or the feed pipeline member, the second feed port is connected to the first pressure pump pipeline member, and the third feed port is connected to the second pressure pump pipeline member, and the large flow channel and the small flow channel are staggered with the discharge port.

[0009] Preferably, the feed channel further has a fourth feed port; in the small discharge state, the fourth feed port is connected to the first pressure pump pipeline component, and the first feed port is connected to the valve core pipeline component or the feed pipeline component.

[0010] Preferably, the large flow channel has a first large flow port and a second large flow port; in the large discharge state, the first large flow port is connected to the first pressure pump pipeline, and the second large flow port is connected to the discharge port, and the pipeline port of the first pressure pump pipeline, the first large flow port, the second large flow port and the discharge port are not on the same straight line.

[0011] Preferably, the small flow channel has a first small flow port and a second small flow port; in the small discharge state, the first small flow port is connected to the second pressure pump pipeline, and the second small flow port is connected to the discharge port, and the pipeline port of the second pressure pump pipeline, the first small flow port, the second small 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 are both spherical valves.

[0013] Preferably, the large flow channel, the small flow channel and the feed channel are not connected to each other.

[0014] The present application also discloses an intelligent color mixing machine, which includes a high-precision reversing valve.

[0015] The beneficial effect of the present application is that the switching of the discharge state is achieved by rotating the valve core assembly, and the valve core assembly after rotation has three discharge states: large discharge state, small discharge state and feed state, that is, the present application can respectively perform large flow rapid discharge and small flow precise discharge, and can select the corresponding flow channel for discharge according to actual production needs, thereby improving production efficiency and broadening application scenarios. When performing large flow rapid discharge, the paint in the first pressure pump pipeline is discharged through the discharge port through the large flow channel, and when performing small flow precise discharge, the paint in the second pressure pump pipeline is discharged through the discharge port through the small flow channel. The small flow channel is used for discharging. Since the diameter of the small flow channel is small, it is conducive to the precise control of the discharge volume of the paint, and can achieve precise discharging and accurate discharge volume, ensure the accuracy of the paint mixing ratio, and improve the production quality of the mixed paint. At the same time, when performing small flow precise discharging, the paint in the first pressure pump pipeline part flows back to the feed pipeline part through the feed channel to achieve reflux pressure relief. Since the first pressure pump pipeline part and the second pressure pump pipeline part are independent of each other, the actual discharge volume during small flow precise discharging is completely derived from the paint in the second pressure pump pipeline part, which is convenient for accurate control of the discharge volume and improves the discharge accuracy. In addition, whether it is high flow rapid discharging or small flow precise discharging, the paint in the other pressure pump pipeline part and the valve core pipeline part will be synchronously returned to the feed pipeline part and the barrel, which can allow the paint in the first pressure pump pipeline part, the second pressure pump pipeline part and the valve core pipeline part to flow fully, avoid the situation where the paint solidifies and causes blockage in the flow channel, and improve the discharge accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 Schematic diagram of the structure of the high-precision reversing valve in the embodiment; Figure 2Another structural diagram of the high-precision reversing valve in the embodiment; Figure 3 is a cross-sectional view of a high-precision reversing valve in an embodiment; Figure 4 Schematic diagram of the structure of the valve core assembly in the embodiment; Figure 5 A structural perspective view of the valve core assembly in the embodiment; Figure 6 is another cross-sectional view of the high-precision reversing valve in the embodiment; Figure 7 This is a cross-sectional view of the valve core assembly in the feeding state in the embodiment; Figure 8 This is a cross-sectional view of the valve core assembly in a high-flow discharge state in the embodiment; Figure 9 It is a cross-sectional view of the valve core assembly in the low flow discharge state in the embodiment.

[0017] Reference numerals: 1. Valve body assembly; 11. Valve core pipeline; 111. Discharge port; 12. Feed pipeline; 13. First pressure pump pipeline; 131. First pressure pump pipeline; 132. First pressure piston; 14. Second pressure pump pipeline; 141. Second pressure pump pipeline; 142. Second pressure piston; 2. Valve core assembly; 21. First valve body; 211. Rotating surface; 22. Second valve body; 23. Large flow channel; 231. First large flow port; 232. Second large flow port; 24. Small flow channel; 241. First small flow port; 242. Second small flow port; 25. Feed 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 DESCRIPTION

[0018] The following diagrams illustrate various embodiments of the present application. For clarity, many practical details will be included in the following description. However, it should be understood that these practical details are not intended to limit the present application. In other words, in some embodiments of the present application, these practical details are not essential. Furthermore, to simplify the drawings, some conventional structures and components are depicted in a simplified schematic manner.

[0019] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0020] In addition, in this application, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or ranking, nor are they used to limit this application. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0021] In order to further understand the application content, features and effects of this application, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0022] Reference Figure 1-Figure 3 , Figure 1 This is a structural diagram of a high-precision reversing valve in an embodiment. Figure 2 This is another structural diagram of the high-precision reversing valve in the embodiment. Figure 3 This is a cross-sectional view of a high-precision reversing valve in an embodiment. The high-precision reversing valve in this embodiment includes a valve body assembly 1 and a valve core assembly 2. The valve body assembly 1 includes a valve core conduit 11, and a feed conduit 12, a first pressure pump conduit 13, and a second pressure pump conduit 14, which are respectively connected to the valve core conduit 11. The valve core assembly 2 is rotatably disposed within the valve core conduit 11. The discharge port 111 of the valve core conduit 11, the conduit openings of the first pressure pump conduit 13, and the conduit openings of the second pressure pump conduit 14 are respectively in contact with the rotating surface 211 of the valve core assembly 2. A large flow channel 23, a small flow channel 24, and a feed channel 25 are defined within the valve core assembly 2. 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 conduit 13 and the discharge port 111, respectively, and the small flow channel 24 is offset from the discharge port 11. In the small discharge state, the small flow channel 24 is communicated with the second pressure pump pipeline 14 and the discharge port 111 respectively, and the feed channel 25 is communicated with the first pressure pump pipeline 13 and the feed pipeline 12 respectively.

[0023] Reference Figure 4 and Figure 5 , Figure 4 This is a structural diagram of the valve core assembly in the embodiment. Figure 5It is a structural perspective view of the valve core assembly in the embodiment. The high-precision reversing valve in this embodiment is used to quantitatively discharge the paint and then mix it to achieve color adjustment. It can be specifically applied to the color adjustment of paint such as car touch-up paint and wall painting. The high-precision reversing valve in this embodiment is used in an intelligent color mixing machine, and the specific description of the intelligent color mixing 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 slide groove of the side wall of the valve core assembly 2 to achieve card connection with the valve core assembly 2. The other end of the rotating handle 27 passes through the valve core pipe part 11 and extends to the outside. 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 can be understood that the switching of the discharge state is achieved by rotating the valve core component 2. The valve core component 2 after rotation has two discharge states: a large discharge state and a small discharge state, that is, the present embodiment 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. When performing large-flow rapid discharge, the paint in the first pressure pump pipeline 13 is discharged from the large-flow channel 23 through the discharge port 111, and when performing small-flow precise discharge, the paint in the second pressure pump pipeline 14 is discharged from the small-flow channel 24 through the discharge port 111. Discharging, since the channel diameter of the small flow channel 24 is small, it is conducive to the precise control of the discharge amount of the paint, and can achieve precise discharging, accurate discharge amount, ensure the accuracy of the paint mixing ratio, and improve the production quality of the mixed paint. At the same time, when performing small flow precise discharging, the paint in the first pressure pump pipeline 13 flows back to the feed pipeline 12 through the feed channel 25 to achieve reflux pressure relief. Since the first pressure pump pipeline 13 and the second pressure pump pipeline 14 are independent of each other, the actual discharge amount during small flow precise discharging is completely derived from the paint in the second pressure pump pipeline 14, which is convenient for accurate control of the discharge amount and improves the discharge accuracy. Specifically, the intelligent color mixing machine includes multiple high-precision reversing valves and multiple barrels, each barrel is connected to a feed pipeline 12, and the multiple barrels respectively contain a variety of different colors of paint. The valve core pipeline 11 is a valve core pipeline, and the feed pipeline 12 is a feed pipeline.

[0024] Re-reference Figure 4 and Figure 5Preferably, the valve core assembly 2 includes a first valve body 21 and a second valve body 22 that are rotatably disposed within the valve core conduit member 11. The rotating surface 211 of the first valve body 21 abuts against the conduit port of the first pressure pump conduit member 13, and the rotating surface 211 of the second valve body 22 abuts against the conduit port and the discharge port 111 of the second pressure pump conduit member 14, respectively. The small flow channel 24 and the feed channel 25 are opened in the second valve body 22, and the large flow channel 23 is opened in the first valve body 21 and the second valve body 22, and the two ends 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. In specific applications, the first valve body 21 and the second valve body 22 are integrally formed and are both spherical valves. The integral formation 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 rotating handle 27 is turned, thereby improving the synchronization of the rotation of the first valve body 21 and the second valve body 22. At the same time, because the first valve body 21 and the second valve body 22 are both spherical valves, compared to traditional cylindrical valves, they can fit more closely with the pipe opening of the first pressure pump pipeline member 13, the pipe opening of the second pressure pump pipeline member 14, and the discharge port 111, thereby improving the airtightness, preventing paint leakage during the discharge process, and further improving the accuracy of the discharge. Of course, in other embodiments, the first valve body 21 and the second valve body 22 can also be integrally formed cylindrical valves, which is not limited here.

[0025] Reference Figure 6 , Figure 6This is another cross-sectional view of the high-precision reversing valve in an embodiment. Preferably, the valve core assembly 2 further defines a pressure relief passage 26. In the high-discharge state, the pressure relief passage 26 communicates with the second pressure pump conduit 14 and the valve core conduit 11, respectively. In practical applications, the pressure relief passage 26 in this embodiment includes a first pressure relief port 261 and a second pressure relief port 262. It is understood that the first pressure relief port 261 is located on the rotating surface 211 of the second valve body 22, while the second pressure relief port 262 is located on the side surface 212 of the second valve body 22. When in the large discharge state, the large flow channel 23 is connected to the first pressure pump pipeline 13 and the discharge port 111 respectively, and the paint in the first pressure pump pipeline 13 can be discharged quickly and at a large flow rate through the large flow channel 23 and the discharge port 111, while the small flow channel 24 is closed by the valve core pipeline 11, that is, the small flow channel 24 is staggered with the second pressure pump pipeline 14 and the discharge port 111, and the pipeline port of the second pressure pump pipeline 14 is connected to the first pressure relief port 261, and the second pressure relief port 262 is connected to the valve core pipeline 11. At this time, the paint in the second pressure pump pipeline 14 can flow into the valve core pipeline 11 through the pressure relief channel 26, and further flow back from the valve core pipeline 11 to the feed pipeline 12 to achieve reflux pressure relief. In short, whether it is a large flow and fast discharge or a small flow and precise discharge, the paint in the other pressure pump pipeline and the valve core pipeline 11 will be synchronously returned to the feed pipeline 12 and the barrel. Specifically, the first pressure pump pipeline component 13 includes a first pressure pump pipeline 131 and a first pressure piston 132. The pipeline mouth of the first pressure pump pipeline 131 abuts against the rotating surface 211 of the first valve body 21. One end of the first pressure piston 132 is movably arranged in the first pressure pump pipeline 131, and is used to press the paint in the first pressure pump pipeline 131 toward the first valve body 21 or to suck the paint in the feed pipeline component 12 into the first pressure pump pipeline 131 through the first valve body 21. The other end of the first pressure piston 132 passes through the first pressure pump pipeline 131 and extends toward the outside. The second pressure pump pipeline component 14 includes a second pressure pump pipeline 141141 and a second pressure piston 142. The pipeline mouth of the second pressure pump pipeline 141 abuts against the rotating surface 211 of the second valve body 22. One end of the second pressure piston 142 is movably arranged in the second pressure pump pipeline 141, and is used to press the paint in the second pressure pump pipeline 141 toward the second valve body 22 or to suck the paint in the feed pipeline component 12 into the second pressure pump pipeline 141 through the second valve body 22. The other end of the second pressure piston 142 passes through the second pressure pump pipeline 141 and extends to the outside.Furthermore, the first pressure pump pipeline member 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 driving 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 the material. That is to say, when the first pressure piston 132 descends to press the material for high-flow and rapid discharge, the second pressure piston 142 also descends synchronously to discharge the paint in the second pressure pump pipeline 141. The paint in the first pressure pump pipe 131 is pressed back into the feed pipe 12 to achieve reflux. Similarly, when the second pressure piston 142 descends to press the material for small flow and precise discharge, the first pressure piston 132 also descends synchronously to press the paint in the first pressure pump pipe 131 back into the feed pipe 12 to achieve reflux. Since the paint is easily solidified when it is left stationary for a long time, it will become viscous and affect the accuracy of the next discharge. In this way, the paint in the first pressure pump pipe 131, the second pressure pump pipe 141 and the valve core pipe 11 can fully flow, avoiding the situation where the paint solidifies and causes blockage in the flow channel and improves the accuracy of discharge.

[0026] Re-reference Figure 4-Figure 6 Preferably, the feed channel 25 has a first feed port 251, a second feed port 252, and a third feed port 253. After rotation, the 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 pipeline 11 or the feed pipeline 12, the second feed port 252 is connected to the first pressure pump pipeline 13, and the third feed port 253 is connected to the second pressure pump pipeline 14. The large flow channel 23 and the small flow channel 24 are both staggered with the discharge port 111. In specific application, the first feed port 251 is opened on the side surface 212 of the first valve body 21, the second feed port 252 is opened on the rotating surface 211 of the first valve body 21, and the third feed port 253 is opened on the rotating surface 211 of the second valve body 22. It can be understood that in the feeding state, the lifting drive module simultaneously drives the first pressing piston 132 and the second pressing piston 142 to rise through the linkage block, and the paint in the barrel passes through the feed pipe part 12 and enters the valve core pipe part 11. The paint in the valve core pipe part 11 enters the feed channel 25 through the first feed port 251, and the paint in the feed channel 25 is sucked 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 simultaneously.

[0027] Re-reference Figure 4-Figure 6Preferably, the feed channel 25 also has a fourth feed port 254. In the small discharge state, the fourth feed port 254 is connected to the first pressure pump pipeline member 13, and the first feed port 251 is connected to the valve core pipeline member 11 or the feed pipeline member 12. In specific applications, the fourth feed port 254 is opened on the rotating surface 211 of the first valve body 21. It can be understood that in the small discharge state, the feed channel 25 is equivalent to the pressure relief channel of the paint in the first pressure pump pipeline 131. The first pressing piston 132 descends to press the paint in the first pressure pump pipeline 131. The paint in the first pressure pump pipeline 131 flows through the pipeline mouth of the first pressure pump pipeline 131, the fourth feed port 254, the feed channel 25, the first feed port 251, the valve core pipeline member 11, and the feed pipeline member 12 in sequence and then flows back into the barrel to achieve pressure relief and reflux.

[0028] Re-reference Figure 4 and Figure 5 Preferably, the large flow channel 23 has a first large flow port 231 and a second large flow port 232. In the large discharge state, the first large flow port 231 is connected to the first pressure pump pipeline member 13, and the second large flow port 232 is connected to the discharge port 111, and the pipeline opening of the first pressure pump pipeline member 13, the first large flow port 231, the second large flow port 232 and the discharge port 111 are not on the same straight line. In specific applications, the first large flow port 231 is opened on the rotating surface 211 of the first valve body 21, and the second large flow port 232 is opened on the rotating surface 211 of the second valve body 22. Since the large flow channel 23 is used for large-flow rapid discharge, the diameter of its port is relatively large. The pipeline opening of the first pressure pump pipeline member 13, the first large flow port 231, the second large flow port 232 and the discharge port 111 are set not on the same straight line to reduce accidental dripping of paint in the large flow channel 23 during discharge.

[0029] Re-reference Figure 4-Figure 6 Preferably, the small flow channel 24 has a first small flow port 241 and a second small flow port 242. In the small discharge state, the first small flow port 241 is connected to the second pressure pump pipeline member 14, and the second small flow port 242 is connected to the discharge port 111, and the pipeline port of the second pressure pump pipeline member 14, the first small flow port 241, the second small flow port 242 and the discharge port 111 are on the same straight line. In specific applications, the first small flow port 241 and the second small flow port 242 are respectively opened at the opposite ends of the rotating surface 211 of the second valve body 22, and the diameter of the second small flow port 242 is smaller than the diameter of the first small flow port 241. The smaller diameter of the second small flow port 242 is conducive to the precise control of the discharge amount of the paint, can achieve precise discharge, accurate discharge amount, and ensure the accuracy of the paint mixing ratio.

[0030] It should be noted that, in this embodiment, there is a gap between the first valve body 21 and the second valve body 22 and the inner wall of the valve core pipeline member 11, but the rotating surface 211 of the first valve body 21 abuts the pipeline port of the first pressure pump pipeline 131, and the rotating surface 211 of the second valve body 22 abuts the second pressure pump pipeline 141 and the discharge port 111 respectively, and there is also a gap between the side surface 212 of the first valve body 21 and the pipeline port of the feed pipeline member 12, that is, the valve core pipeline member 11 is always connected to the feed pipeline member 12, and the ports that are not connected to the pipeline port of the first pressure pump pipeline 131, the pipeline port of the second pressure pump pipeline 141 and the discharge port 111 are all connected to the valve core pipeline member 11, and the first valve body 21 The side surface 212 faces the pipe opening of the feed pipe member 12, so that when in the feeding state, the paint can directly enter the valve core pipe member 11 from the feed pipe member 12, which increases the feed amount of paint per unit time and improves the feeding efficiency. In addition, 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 paint originally in the valve core pipe member 11, the large flow channel 23, the small flow channel 24 and the pressure relief channel 26 will also flow due to the feeding process, so that the paint in the valve core pipe member 11 and the valve core component 2 can always maintain a flowing state, avoiding the paint from solidifying and becoming viscous due to long-term static state, which affects the accuracy of the next discharge. Similarly, when performing large-flow rapid discharge and small-flow precise discharge, the paint in the valve core pipe member 11 and the valve core component 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 can abut against the pipe opening of the feed pipe member 12, and the first valve body 21 and the second valve body 22 fit against the inner wall of the valve core pipe member 11, which is not limited here.

[0031] Re-reference Figure 4-Figure 6 Preferably, the large flow channel 23, the small flow channel 24 and the feed channel 25 are not connected to each other. It can be understood that the large flow channel 23, the small flow channel 24, the feed channel 25 and the pressure relief channel in this embodiment are all opened in the valve core assembly 2, and the four channels are all independent flow channels. Compared with the traditional valve core in which the channels are interconnected, this embodiment can ensure that the four channels of the valve core assembly 2 will not affect each other when it is working, which is convenient for controlling the paint discharge amount, ensuring the controllability of the paint discharge amount, and improving the accuracy of the discharge. In particular, when performing small flow and precise discharge, the paint squeezed out all comes from the second pressure pump pipeline 141 and only flows from the small flow channel 24, further improving the accuracy of the paint discharge control.

[0032] Reference Figure 7 , Figure 7The figure shows a cross-sectional view of the valve core assembly in the feeding state of the embodiment. The high-precision reversing valve in this embodiment has three operating states: feeding state, high-flow discharge state, and low-flow discharge state. In the feeding state, the valve core assembly 2 is rotated by turning the handle 27, so that the first feed port 251 is connected to the feed pipe 12, the second feed port 252 is connected to the first pressure pump pipe 131, and the third feed port 253 is connected to the second pressure pump pipe 141. The low-flow channel 24 and the high-flow channel 23 are both staggered from the discharge port. The lifting drive module drives the first and second pressure pistons 132 and 142 to rise synchronously through the linkage block to pump the paint. The paint is drawn from the barrel. The paint flows through the feed pipe 12, the valve core pipe 11, the first feed port 251, and the feed channel 25 in sequence. After that, the paint is divided into two paths and enters the first and second pressure pump pipes 131 and 141 through the second feed port 252 and the third feed port 253 respectively.

[0033] Reference Figure 8 , Figure 8 This is a cross-sectional view of the valve core assembly in the high-flow discharge state of the embodiment. When the paint in the first pressure pump pipeline 131 and the second pressure pump pipeline 141 reaches a certain amount, the valve core assembly 2 can be rotated to switch to the high-flow discharge state or the low-flow discharge state. In the high-flow discharge state, the valve core assembly 2 is rotated by turning the handle 27, so that the first high-flow port 231 is connected to the first pressure pump pipeline 131, the second high-flow port 232 is connected to the discharge port 111, the low-flow channel 24 is staggered from the discharge port 111, the first pressure relief port 261 is connected to the second pressure pump pipeline 141, and the second pressure relief port 262 is connected to the valve core pipeline member 11. The lifting drive module drives the first pressing piston 132 and the second pressing piston 142 to descend synchronously to press the materials through the linkage block. The first pressing piston 132 descends to press the paint in the first pressure pump pipeline 131. The paint in the first pressure pump pipeline 131 flows through the pipeline opening of the first pressure pump pipeline 131, the first large flow port 231, the large flow channel 23, the second large flow port 232, and the discharge port 111 in sequence for high-flow and rapid discharge. At the same time, the second pressing piston 142 descends to press the paint in the second pressure pump pipeline 141. The paint in the second pressure pump pipeline 141 flows through the pipeline opening of the second pressure pump pipeline 141, the first pressure relief port 261, the pressure relief channel 26, the second pressure relief port 262, the valve core pipeline component 11, and the feed pipeline component 12 in sequence before flowing back into the barrel to achieve pressure relief and reflux.

[0034] 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 turning the handle 27, so that the first low-flow port 241 is connected to the second pressure pump pipeline 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 pipeline 131, and the first feed port 251 is connected to the valve core pipeline member 11. The lifting drive module drives the first pressing piston 132 and the second pressing piston 142 to descend synchronously through the linkage block to press the material, wherein the second pressing piston 142 descends to press the paint in the second pressure pump pipeline 141. The paint in the second pressure pump pipeline 141 flows through the pipeline port of the second pressure pump pipeline 141, the first low-flow port 241, the low-flow channel 24, the second low-flow port 242, and the discharge port 111 in sequence to perform low-flow precise discharge. At the same time, the first pressing piston 132 descends to press the paint in the first pressure pump pipeline 131. The paint in the first pressure pump pipeline 131 flows through the pipeline mouth of the first pressure pump pipeline 131, the fourth feed port 254, the feed channel 25, the first feed port 251, the valve core pipeline part 11, and the feed pipeline part 12 in turn, and then flows back into the barrel to achieve pressure relief and reflux.

[0035] In summary, the switching of the discharging state is achieved by rotating the valve core component 2. The valve core component 2 after rotation has three discharging states: large discharging state, small discharging state and feeding state. That is, this embodiment can respectively perform large-flow rapid discharging and small-flow precise discharging. The corresponding flow channel can be selected for discharging according to actual production needs, thereby improving production efficiency and broadening application scenarios. When performing large-flow rapid discharging, the paint in the first pressure pump pipeline 13 is discharged from the large-flow channel 23 through the discharge port 111, and when performing small-flow precise discharging, the paint in the second pressure pump pipeline 14 is discharged from the small-flow channel 24 through the discharge port 111. During discharging, since the diameter of the small flow channel 24 is small, it is convenient to precisely control the discharge amount of the coating, and can achieve precise discharging and accurate discharge amount, ensure the accuracy of the coating mixing ratio, and improve the production quality of the mixed coating. At the same time, when performing small flow precise discharging, the coating in the first pressure pump pipe member 13 flows back to the feed pipe member 12 through the feed channel 25 to achieve reflux pressure relief. Since the first pressure pump pipe member 13 and the second pressure pump pipe member 14 are independent of each other, the actual discharge amount during small flow precise discharging is completely derived from the coating in the second pressure pump pipe member 14, which is convenient for accurately controlling the discharge amount and improving the discharge accuracy. In addition, whether performing large flow rapid discharging or small flow precise discharging, the coating in the other pressure pump pipe member and the valve core pipe member 11 will be synchronously returned to the feed pipe member 12 and the barrel, allowing the coating in the first pressure pump pipe member 13, the second pressure pump pipe member 14 and the valve core pipe member 11 to flow fully, avoiding the situation where the coating solidifies and causes blockage in the flow channel and improving the discharge accuracy.

[0036] The above is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A high-precision reversing valve, characterized in that: include: A valve body assembly (1) and a valve core assembly (2), wherein the valve body assembly (1) comprises a valve core pipeline member (11) and a feed pipeline member (12), a first pressure pump pipeline member (13) and a second pressure pump pipeline member (14) respectively connected to the valve core pipeline member (11); the valve core assembly (2) is rotatably arranged in the valve core pipeline member (11); the discharge port (111) of the valve core pipeline member (11), the pipeline port of the first pressure pump pipeline member (13) and the pipeline port of the second pressure pump pipeline member (14) are connected to the valve core pipeline member (11). The passages are respectively in contact with the rotating surface (211) of the valve core assembly (2), and a large flow channel (23), a small flow channel (24) and a feed channel (25) are provided in the valve core assembly (2); after rotation, the valve core assembly (2) has a large discharge state and a small discharge state, wherein in the large discharge state, the large flow channel (23) is respectively connected with the first pressure pump pipeline (13) and the discharge port (111), and the small flow channel (24) is staggered with the discharge port (111); In the small discharge state, the small flow channel (24) is communicated with the second pressure pump pipeline (14) and the discharge port (111) respectively, and the feed channel (25) is communicated with the first pressure pump pipeline (13) and the feed pipeline (12) respectively.

2. The high-precision reversing 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) which are rotatably arranged in the valve core pipeline member (11); the rotating surface (211) of the first valve body (21) is in contact with the pipeline opening of the first pressure pump pipeline member (13); the rotating surface (211) of the second valve body (22) is in contact with the pipeline opening of the second pressure pump pipeline member (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 ends 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 reversing valve according to claim 1, characterized in that: The valve core assembly (2) is further provided with a pressure relief channel (26); in a large discharge state, the pressure relief channel (26) is communicated with the second pressure pump pipeline (14) and the valve core pipeline (11) respectively.

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

5. The high-precision reversing valve according to claim 4, characterized in that: The feed channel (25) further has a fourth feed port (254); in the small discharge state, the fourth feed port (254) is communicated with the first pressure pump pipeline (13), and the first feed port (251) is communicated with the valve core pipeline (11) or the feed pipeline (12).

6. The high-precision reversing valve according to claim 1, characterized in that: The large flow channel (23) has a first large flow port (231) and a second large flow port (232); in a large discharge state, the first large flow port (231) is in communication with the first pressure pump pipeline member (13), and the second large flow port (232) is in communication with the discharge port (111), and the pipeline port of the first pressure pump pipeline member (13), the first large flow port (231), the second large flow port (232) and the discharge port (111) are not in the same straight line.

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

8. The high-precision reversing 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 spherical valves.

9. The high-precision reversing valve according to claim 1, characterized in that: The large flow channel (23), the small flow channel (24) and the feed channel (25) are not connected to each other.

10. An intelligent color mixing machine, characterized in that: It comprises the high-precision reversing valve according to any one of claims 1 to 9.

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