High-precision large-capacity and small-capacity simultaneous discharging metering pump, color mixer and split charging and filling machine

Abstract

The utility model provides a high-precision metering pump capable of simultaneously discharging large capacity and small capacity. The high-precision metering pump comprises a charging barrel assembly, a large pump assembly, a small pump assembly and a material valve assembly. The large pump assembly comprises a large pump pipeline piece and a large pump piston piece, and one end of the large pump piston piece is movably arranged in the large pump pipeline piece in a penetrating mode. The small pump assembly comprises a small pump pipeline piece, a small pump piston piece and a linkage piece, the small pump pipeline piece is arranged beside the large pump pipeline piece side by side, and the two ends of the linkage piece are connected with the large pump piston piece and the small pump piston piece respectively; the material valve assembly comprises a valve element part and a material valve pipeline part, and the valve element part is rotationally arranged on the material valve pipeline part. Due to the fact that the small pump pipeline part and the large pump pipeline part are arranged side by side and are independent of each other, the small pump pipeline part with the larger capacity can be conveniently arranged, meanwhile, the discharging precision can be higher by being matched with a small-flow channel, and the small pump piston part always moves in the small pump pipeline part; and collision and abrasion caused by repeated entering and exiting of the small pump piston piece in the small pump pipeline piece are avoided, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of color mixing machines, in particular to a high-precision metering pump capable of discharging materials of large and small capacities at the same time, a color mixing machine and a sub-packaging and filling machine. Background Art

[0002] A color mixer is a device used for precise color mixing. It primarily mixes different color pastes according to color recipe data, precisely dispensing the required weight or volume of paste using a metering pump, to achieve the desired color. A color mixer typically includes multiple discharge pumps, each pumping out a specific color of paste.

[0003] In order to achieve different application scenarios, the existing discharge pumps generally have two discharge modes: large-flow fast discharge and small-flow precise discharge. For example, the publication number CN105756919B discloses a color paste pump that can inject both large and small amounts of color paste. It arranges two reciprocating positive displacement pumps of different sizes in a large-capacity metering pump to respectively perform large-scale discharge and small-amount discharge. When the small reciprocating part is pressed down in the small pump body for small-amount discharge, the volume of the small pump body determines the total amount of color paste that can be discharged in small amounts. Since the small pump body is arranged inside the large pump body, the volume of the small pump body is small, and the color paste that can be discharged in a small-amount discharge operation is small. The total amount is also small, which often leads to the inability to complete the micro-injection of color paste in one go when small-flow precise discharging is required. For this reason, it is often necessary to close the discharge port and re-pump new color paste into the small pump body and repeat the micro-injection. The steps are cumbersome and seriously affect production efficiency. Moreover, when it switches from a large-scale injection state to a micro-injection state, the small pump piston needs to be allowed to enter the small pump body first, and when it is in the extraction state, the small pump piston needs to be pulled out of the small pump body. In this way, the small pump piston repeatedly enters and exits the small pump body, which is easy to cause the small pump piston to collide or scratch with the small pump body due to insufficient accuracy of the piston rod movement, thereby causing damage to the small pump piston, and then causing the color paste pump to be unusable. Utility Model Content

[0004] In response to the deficiencies in the prior art, the present application provides a high-precision metering pump, a color mixing machine, and a sub-packaging and filling machine that can discharge materials of both large and small capacities simultaneously.

[0005] The present application discloses a high-precision metering pump for discharging materials of large and small capacities simultaneously, comprising: a barrel assembly, a large pump assembly, a small pump assembly and a valve assembly; the barrel assembly is loaded with color paste; the large pump assembly comprises a large pump pipeline and a large pump piston, one end of the large pump piston is movably arranged in the large pump pipeline, and the other end of the large pump piston is located outside the large pump pipeline; the small pump assembly comprises a small pump pipeline, a small pump piston and a linkage, the small pump pipeline is arranged side by side beside the large pump pipeline, one end of the small pump piston is movably arranged in the small pump pipeline, and the other end of the small pump piston is located outside the small pump pipeline. The two ends of the linkage part are respectively connected to the other end of the large pump piston part and the other end of the small pump piston part; the material valve assembly includes a valve core part and a material valve pipeline part, the valve core part is rotatably arranged on the material valve pipeline part, and the material valve pipeline part is respectively connected with the barrel assembly, the large pump pipeline part and the small pump pipeline part; the valve core part after rotation has a large discharge state and a small discharge state, wherein in the large discharge state, the large pump pipeline part and the small pump pipeline part are connected with the valve core part at the same time, and large discharge is carried out through the valve core part; in the small discharge state, the large pump pipeline part is connected with the barrel assembly through the valve core part, and the small pump pipeline part performs small discharge through the valve core part.

[0006] Preferably, the material valve pipeline component includes a valve core pipeline, a feed pipeline, a first pressure pump pipeline and a second pressure pump pipeline. The valve core component is rotatably arranged in the valve core pipeline. One end of the feed pipeline is connected to the barrel assembly, and the other end of the feed pipeline is abutted against the sealing surface of the valve core component. The first pressure pump pipeline is respectively connected to the large pump pipeline component and the valve core pipeline, one end of the second pressure pump pipeline is connected to the small pump pipeline component, and the other end of the second pressure pump pipeline is abutted against the conversion surface of the valve core component. A discharge port is opened at the bottom of the valve core pipeline, and the discharge port is abutted against the conversion surface.

[0007] Preferably, a large flow channel, a small flow channel, a feed channel and a pressure channel are provided in the valve core component, the large flow channel has a first port and a second port, the first port is connected to the valve core pipeline, the second port is opened on the conversion surface, the feed channel has a fourth port, a fifth port and a sixth port, the fourth port and the fifth port are respectively opened on the sealing surface and the conversion surface, the sixth port is connected to the valve core pipeline, the two ports of the small flow channel are respectively opened on opposite sides of the conversion surface, the pressure channel has a seventh port and an eighth port, the seventh port is opened on the conversion surface, and the eighth port is connected to the valve core pipeline.

[0008] Preferably, the large flow channel further has a third port, and the third port is opened on the sealing surface.

[0009] Preferably, the small pump assembly further comprises a stabilizing member, one end of which is fixed to the outer wall of the barrel assembly, and the other end of which is fixedly connected to the large pump pipeline member and the small pump pipeline member respectively.

[0010] Preferably, the material valve pipeline further includes at least two fixing blocks, which are respectively arranged at two opposite ends of the valve core pipeline, and each fixing block is provided with a threaded hole.

[0011] Preferably, the valve core pipeline includes a valve core pipeline body and a bottom cover, the bottom cover is detachably installed at the bottom of the valve core pipeline body, the valve core part is rotatably arranged in the valve core pipeline body, the valve core pipeline body is connected to the first pressure pump pipeline, and the discharge port is opened at the bottom cover.

[0012] Preferably, the outer wall ring of the bottom cover is provided with a third thread, and the inner wall ring of the bottom of the valve core pipe body is provided with a fourth thread. The bottom cover can be detachably installed on the bottom of the valve core pipe body through the cooperation of the third thread and the fourth thread.

[0013] The present application also discloses a color mixing machine, comprising a high-precision metering pump capable of discharging materials of large and small capacities simultaneously.

[0014] The present application also discloses a sub-packaging and filling machine, comprising a high-precision metering pump capable of discharging materials of large and small capacities simultaneously.

[0015] The beneficial effect of the present application is that by rotating the valve core, two discharging modes, large discharging and small discharging, can be achieved. In the small discharging state, the small pump pipeline part performs small discharging through the valve core, and the amount of color paste it can discharge is the capacity of the small pump pipeline part. Since the small pump pipeline part and the large pump pipeline part are arranged side by side and are independent of each other, it is convenient to set a small pump pipeline part with a larger capacity, thereby increasing the total amount of color paste that can be injected at one time in the small discharging state, improving the discharging efficiency, and the small pump piston part always moves in the small pump pipeline part, avoiding collision and wear of the small pump piston part due to repeated entry and exit of the small pump pipeline part, thereby extending the service life. At the same time, through the setting of the linkage part, only one driving source is needed to drive the large pump piston part and the small pump piston part to move synchronously, and in the small discharging state, the large pump pipeline part is connected to the barrel assembly through the valve core, that is, the color paste in the small pump pipeline part is used for small discharging, and the color paste in the large pump pipeline part can flow back into the barrel assembly to complete pressure relief, thereby improving the stability of discharging. 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:

[0017] Figure 1 Schematic diagram of the structure of a high-precision metering pump with large and small capacities discharging materials simultaneously in an embodiment;

[0018] Figure 2 A cross-sectional view of a high-precision metering pump for simultaneously discharging large and small capacities in an embodiment;

[0019] Figure 3 for Figure 2 Enlarged view of part A;

[0020] Figure 4 Schematic diagram of the structure of the feed valve pipeline in the embodiment;

[0021] Figure 5 Another structural diagram of the feed valve pipeline in the embodiment;

[0022] Figure 6 Schematic diagram of the structure of the valve core member in the embodiment;

[0023] Figure 7 is another structural schematic diagram of the valve core member in the embodiment;

[0024] Figure 8 A perspective view of a valve core member in an embodiment;

[0025] Figure 9 is another perspective view of the valve core member in the embodiment;

[0026] Figure 10 It is a cross-sectional view of the valve core member in the pumping state in the embodiment;

[0027] Figure 11 It is a cross-sectional view of the valve core member in the large discharge state in the embodiment;

[0028] Figure 12 It is a cross-sectional view of the valve core member in the small discharge state in the embodiment;

[0029] Figure 13 This is a schematic diagram of the structure of a high-precision metering pump with large and small capacities discharging simultaneously in an embodiment.

[0030] Reference numerals:

[0031] 1. Barrel assembly; 2. Large pump assembly; 21. Large pump piping; 22. Large pump piston; 3. Small pump assembly; 31. Small pump piping; 32. Small pump piston; 33. Linkage; 34. Stabilizer; 4. Valve assembly; 41. Valve core; 411. Sealing surface; 412. Conversion surface; 413. Large flow channel; 4131. First port; 4132. Second port; 4133. Third port; 414. Small flow channel; 415. Feed channel; 4151 , fourth port; 4152, fifth port; 4153, sixth port; 416, material pressing channel; 4161, seventh port; 4162, eighth port; 417, valve core surface; 42, material valve pipeline; 421, valve core pipeline; 4211, material outlet; 4212, valve core pipeline body; 4213, bottom cover; 422, feed pipeline; 423, first pressure pump pipeline; 424, second pressure pump pipeline; 425, fixed block; 426, second cavity; 43, rotating handle. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Example 1:

[0037] Reference Figure 1-Figure 3 , Figure 1 This is a schematic diagram of the structure of a high-precision metering pump with large and small capacities discharging simultaneously in an embodiment. Figure 2 This is a cross-sectional view of a high-precision metering pump for simultaneously discharging large and small capacities in an embodiment. Figure 3 for Figure 2The enlarged view of section A in the middle shows a high-precision, large- and small-capacity metering pump in this embodiment, which simultaneously discharges materials. The pump assembly 1 is loaded with color paste. The large pump assembly 2 includes a large pump pipe 21 and a large pump piston 22. One end of the large pump piston 22 is movably inserted into the large pump pipe 21, while the other end of the large pump piston 22 is located outside the large pump pipe 21. The small pump assembly 3 includes a small pump pipe 31, a small pump piston 32, and a linkage 33. The small pump pipe 31 is arranged side by side with the large pump pipe 21. One end of the small pump piston 32 is movably inserted into the small pump pipe 31, while the other end of the small pump piston 32 is located outside the small pump pipe 31. The two ends of the linkage 33 are connected to the other ends of the large pump piston 22 and the small pump piston 32, respectively. The material valve assembly 4 includes a valve core 41 and a material valve conduit 42. The valve core 41 is rotatably mounted on the material valve conduit 42, which is connected to the barrel assembly 1, the large pump conduit 21, and the small pump conduit 31, respectively. After rotation, the valve core 41 has a large discharge state and a small discharge state. In the large discharge state, the large pump conduit 21 and the small pump conduit 31 are simultaneously connected to the valve core 41, and large discharge is carried out through the valve core 41. In the small discharge state, the large pump conduit 21 is connected to the barrel assembly 1 through the valve core 41, and the small pump conduit 31 is connected to the valve core 41 for small discharge.

[0038] The high-precision metering pump with simultaneous large and small capacity discharge in this embodiment can achieve two discharge modes, large discharge and small discharge, by rotating the valve core member 41. In the small discharge state, the small pump pipeline member 31 performs small discharge through the valve core member 41, and the amount of color paste it can discharge is equal to the capacity of the small pump pipeline member 31. Since the small pump pipeline member 31 and the large pump pipeline member 21 are arranged side by side and are independent of each other, it is convenient to set the small pump pipeline member 31 with a larger capacity, thereby increasing the total amount of color paste that can be injected at one time in the small discharge state and improving discharge efficiency. At the same time, through the arrangement of the linkage member 33, this embodiment only needs to set a single drive source to drive the large pump piston member 22 and the small pump piston member 32 to move synchronously. In the small discharge state, the large pump pipeline member 21 is connected to the barrel assembly 1 through the valve core member 41. That is, the color paste in the small pump pipeline member 31 is used for small discharge, while the color paste in the large pump pipeline member 21 can flow back into the barrel assembly 1 to complete pressure relief, thereby improving the stability of discharge. Specifically, the barrel assembly 1 is an existing color paste receiving barrel, in which a stirring mechanism is installed.

[0039] Reference Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the structure of the feed valve pipeline in the embodiment. Figure 5This is another structural schematic diagram of the material valve pipeline component in the embodiment. Preferably, the material valve pipeline component 42 includes a valve core pipeline 421, a feed pipeline 422, a first pressure pump pipeline 423 and a second pressure pump pipeline 424. The valve core component 41 is rotatably arranged in the valve core pipeline 421, one end of the feed pipeline 422 is connected to the barrel assembly 1, and the other end of the feed pipeline 422 is abutted against the sealing surface 411 of the valve core component 41. The first pressure pump pipeline 423 is respectively connected to the large pump pipeline component 21 and the valve core pipeline 421, one end of the second pressure pump pipeline 424 is connected to the small pump pipeline component 31, and the other end of the second pressure pump pipeline 424 is abutted against the conversion surface 412 of the valve core component 41. A discharge port 4211 is provided at the bottom of the valve core pipeline 421, and the discharge port 4211 is abutted against the conversion surface 412. In specific applications, the valve core member 41 in this embodiment is a spherical valve, and the two opposite sides of the valve core member 41 are flattened to form planes, namely the sealing surface 411 and the valve core surface 417, while the arc surface in the middle of the valve core member 41 is the conversion surface 412. It can be understood that the rotation of the valve core member 41 is based on the line connecting the center of the sealing surface 411 and the center of the valve core surface 417 as the rotation axis. The valve core member 41 is equivalent to dividing the valve core pipeline 421 into two left and right cavities. For ease of description in this embodiment, the left and right cavities are respectively referred to as the first cavity and the second cavity 426. The valve core member 41 is rotatably arranged in the first cavity, with the sealing surface 411 facing the feed pipeline 422 and the valve core surface 417 facing the second cavity 426. The second cavity 426 is connected to the first pressure pump pipeline 423. Specifically, a rotating groove is also provided on the valve core surface 417 of the valve core member 41, and the material valve assembly 4 also includes a rotating handle 43. One end of the rotating handle 43 extends into the rotating groove, and the other end of the rotating handle 43 passes through the second cavity 426 and extends toward the outside of the valve core pipe 421. By rotating the other end of the rotating handle 43, the valve core member 41 can be driven to rotate, thereby switching to different discharging states or extraction states.

[0040] Reference Figure 6-Figure 9 , Figure 6 This is a schematic diagram of the structure of the valve core member in the embodiment. Figure 7 This is another structural diagram of the valve core member in the embodiment, Figure 8 A perspective view of the valve core member in the embodiment, Figure 9This is another perspective view of the valve core component in the embodiment. Preferably, a large flow channel 413, a small flow channel 414, a feed channel 415 and a pressure channel 416 are provided in the valve core component 41. The large flow channel 413 has a first port 4131 and a second port 4132. The first port 4131 is connected to the valve core pipe 421, and the second port 4132 is opened on the conversion surface 412. The feed channel 415 has a fourth port 4151, a fifth port 4152 and a sixth port 4153. The fourth port 4151 and the fifth port 4152 are respectively opened on the sealing surface 411 and the conversion surface 412, and the sixth port 4153 is connected to the valve core pipe 421. The two ports of the small flow channel 414 are respectively opened on opposite sides of the conversion surface 412. The pressure channel 416 has a seventh port 4161 and an eighth port 4162. The seventh port 4161 is opened on the conversion surface 412, and the eighth port 4162 is connected to the valve core pipe 421. The high-flow channel 413 also has a third port 4133, which is located on the sealing surface 411. In practical applications, the valve core 41 defines four independent channels: the high-flow channel 413, the low-flow channel 414, the feed channel 415, and the pressure channel 416. The third port 4133 and the fourth port 4151 are located on the sealing surface 411, while the first port 4131, the sixth port 4153, and the eighth port 4162 are located on the valve core surface 417. The second port 4132, the fifth port 4152, the seventh port 4161, and both ports of the low-flow channel 414 are located on the switching surface 412.

[0041] Re-reference Figure 1Preferably, the small pump assembly 3 also includes a stabilizing member 34, one end of which is fixed to the outer wall of the barrel assembly 1, and the other end of the stabilizing member 34 is fixedly connected to the large pump pipe member 21 and the small pump pipe member 31 respectively. In specific applications, the large pump pipe member 21 and the small pump pipe member 31 in this embodiment are both long cylindrical pressure pump pipes, which can ensure that the capacity is increased while the outer diameter of their cross-section is small. By setting the stabilizing member 34, the position stability of the large pump pipe member 21 and the small pump pipe member 31 can be improved, and the large pump pipe member 21 and the small pump pipe member 31 can be prevented from tipping over. Specifically, the stabilizing member 34 is a fixed sleeve. The large pump piston member 22 includes a large piston rod and a pressing block. The pressing block is provided at one end of the large piston rod and is lifted and lowered back and forth in the large pump pipe member 21 to achieve material extraction and pressing. The other end of the large piston rod passes through the top cover of the large pump pipe member 21 and extends outward, and the linkage member 33 is connected to the other end of the large piston rod. The structure of the small pump piston 32 is similar to that of the large pump piston 22, except that the diameter of the large pump conduit 21 is larger than that of the small pump conduit 31. The small pump piston 32 is adapted to fit within the small pump conduit 31, and this will not be further described here. The linkage 33, a linkage block, connects the other end of the large pump piston 22 to the other end of the small pump piston 32. This allows both pistons to be raised and lowered synchronously using a single drive source, simplifying the structure.

[0042] Re-reference Figure 4 Preferably, the inner wall ring of the first pressure pump pipeline 423 is provided with a first thread, and the outer wall ring of one end of the large pump pipeline member 21 is provided with a second thread, and the large pump pipeline member 21 is threadedly sealed to the first pressure pump pipeline 423 by the first thread and the second thread. The provision of the first thread and the second thread not only improves the sealing performance of the connection between the large pump pipeline member 21 and the first pressure pump pipeline 423, but also enables the large pump pipeline member 21 and the first pressure pump pipeline 423 to be detachably connected, which facilitates the later disassembly and separation of the large pump pipeline member 21 and the first pressure pump pipeline 423 for cleaning or maintenance. Specifically, the inner wall ring of the second pressure plate pipeline 424 is provided with a fifth thread, and the outer wall ring of one end of the small pump pipeline member 31 is provided with a sixth thread, and the small pump pipeline member 31 is threadedly sealed to the second pressure plate pipeline 424 by the fifth thread and the sixth thread.

[0043] Re-reference Figure 5Preferably, the valve core pipeline 421 includes a valve core pipeline body 4212 and a bottom cover 4213. The bottom cover 4213 is detachably mounted on the bottom of the valve core pipeline body 4212. The valve core member 41 is rotatably mounted in the valve core pipeline body 4212. The valve core pipeline body 4212 is in communication with the first pressure pump pipeline 423. The discharge port 4211 is provided in the bottom cover 4213. Due to the provision of the bottom cover 4213, when the valve core member 41 inside the valve core pipeline body 4212 is severely worn and needs to be replaced, or when the color paste inside the valve core pipeline body 4212 solidifies and needs to be cleaned, the bottom cover 4213 can be removed from the valve core pipeline body 4212, thereby allowing the valve core member 41 to be removed from the valve core pipeline body 4212 for subsequent replacement or cleaning. Specifically, the outer wall ring of the bottom cover 4213 is provided with a third thread, and the inner wall ring of the bottom of the valve core pipe body 4212 is provided with a fourth thread. The third and fourth threads cooperate to enable the bottom cover 4213 to be detachably mounted on the bottom of the valve core pipe body 4212. Due to the provision of the third and fourth threads, when the bottom cover 4213 is screwed onto the bottom of the valve core pipe body 4212, not only is its sealing performance good, but the screwed installation method also keeps the bottom cover 4213 in a relatively horizontal state. Compared to the traditional method of fixing the bottom cover 4213 with multiple screws, this avoids the situation where one side of the bottom cover 4213 is higher than the other side due to different tightening depths of the screws, thereby improving the fit between the bottom cover 4213 and the valve core member 41 and further enhancing the sealing performance.

[0044] Reference Figure 10 and Figure 13 , Figure 10 This is a cross-sectional view of the valve core member in the pumping state in the embodiment. Figure 13 This is a schematic diagram of the structure of a high-precision, large-capacity, and small-capacity metering pump in an embodiment. This high-precision, large-capacity, and small-capacity metering pump has three operating states: pumping, large-capacity, and small-capacity. These three operating states are switched by rotating the valve core 41 by turning the handle 43. In the pumping state, the fourth port 4151 communicates with the feed pipe 422, the fifth port 4152 communicates with the second pressure pump pipe 424, and the sixth port 4153 communicates with the second cavity 426. The discharge port 4211 is offset from all ports on the switching surface 412. At this point, the large pump piston 22 and the small pump piston 32 rise synchronously to pump. The colorant is drawn from the large pump pipe 21 along a path that follows: the barrel assembly 1, the feed pipe 422, the fourth port 4151, the feed channel 415, the sixth port 4153, the second cavity 426, the first pressure pump pipe 423, and the large pump pipe 21. The extraction path of the color paste in the small pump pipe 31 is: barrel assembly 1, feed pipe 422, fourth port 4151, feed channel 415, fifth port 4152, second pressure pump pipe 424, and small pump pipe 31. Extraction is completed after the large pump piston 22 and the small pump piston 32 rise to a predetermined height.

[0045] Reference Figure 11 and Figure 13 , Figure 11 This is a cross-sectional view of the valve core component in the embodiment in the large discharge state. In this state, the feed pipe 422 is staggered from the third port 4133 and the fourth port 4151. The seventh port 4161 is connected to the second pressure pump pipe 424, the eighth port 4162 is connected to the second cavity 426, the first port 4131 is connected to the second cavity 426, and the second port 4132 is connected to the discharge port 4211. At this time, the large pump piston 22 and the small pump piston 32 descend synchronously to begin pressing the material. The pressing path of the color paste in the large pump pipe 21 is: large pump pipe 21, first pressure pump pipe 423, second cavity 426, first port 4131, large flow channel 413, second port 4132, and discharge port 4211. The color paste pressing path in the small pump conduit 31 is as follows: small pump conduit 31, second pressure pump conduit 424, seventh port 4161, pressing channel 416, eighth port 4162, second cavity 426, first port 4131, high-flow channel 413, second port 4132, and discharge port 4211. It is understood that in the high-flow discharge mode, the color paste in both the large pump conduit 21 and the small pump conduit 31 participates in the discharge, and is ultimately discharged from the discharge port 4211 through the second port 4132 of the high-flow channel 413.

[0046] Reference Figure 12 and Figure 13 , Figure 12 This is a cross-sectional view of the valve core assembly in the embodiment in the low-discharge state. In this state, the two ports of the small-flow channel 414 are connected to the second pressure pump pipeline 424 and the discharge port 4211, respectively. The first port 4131 is connected to the second cavity 426, and the third port 4133 is connected to the feed pipeline 422. At this point, the large pump piston 22 and the small pump piston 32 descend synchronously to begin pressurizing the material. The color paste in the small pump pipeline 31 sequentially passes through the small pump pipeline 31, the second pressure pump pipeline 424, the low-flow channel 414, and the discharge port 4211 for low-discharge. The color paste in the large pump pipeline 21 then flows through the large pump pipeline 21, the first pressure pump pipeline 423, the second cavity 426, the first port 4131, the high-flow channel 413, the third port 4133, and the feed pipeline 422 before flowing back into the barrel assembly 1 to relieve pressure. It can be understood that in the small discharging state, only the small pump pipe fitting 31 cooperates with the small flow channel 414 to perform small discharging, and the color paste in the large pump pipe fitting 21 flows back into the barrel assembly 1. The channel radius of the small flow channel 414 is much smaller than the channel radius of the large flow channel 413, and combined with the smaller pipe diameter of the small pump pipe fitting 31, small flow and precise discharging can be achieved.

[0047] Example 2:

[0048] The color mixing machine in this embodiment includes a rotating disk and multiple high-precision, large- and small-capacity simultaneous metering pumps, as described in Example 1. These high-precision, large- and small-capacity simultaneous metering pumps are arranged around the rotating disk, each responsible for discharging a specific color paste. The method and structure for switching between different discharge pumps in the color mixing machine are conventional and will not be further described here. Specifically, the material valve conduit 42 also includes at least two fixed blocks 425, located at opposite ends of the valve core conduit 421. Each fixed block 425 has a threaded hole. In specific applications, the barrel assembly 1 of the high-precision metering pump for simultaneous discharge of large and small capacities in this embodiment is fixed on a rotating disk, a through hole is opened on the rotating disk at the position corresponding to the material valve assembly 4, the bottom of the material valve assembly 4 is passed through the through hole, and is screwed to the threaded hole on the fixed block 425 and then fixed to the rotating disk, thereby fixing the valve core pipe 421 to the rotating disk. In this way, when the rotating handle 43 is rotated, the position of the valve core pipe 421 will not shake, ensuring that the color paste can be discharged stably.

[0049] Example 3:

[0050] The sub-packaging filling machine in this embodiment includes the high-precision metering pump with large and small capacities that discharges materials simultaneously, the rotary drive mechanism, and the pressure pump drive mechanism in the first embodiment. The rotary drive mechanism is used to rotate the rotary handle 43 to realize the control valve core member 41 to rotate and switch the working state. The pressure pump drive mechanism is used to drive the linkage member 33 to rise and fall, thereby driving the large pump piston member 22 and the small pump piston member 32 to rise and fall, thereby realizing material extraction and discharge. The pressure pump drive mechanism can be an existing lifting module with a lifting clamp, and the lifting clamp is connected to the linkage member 33. The lifting module drives the lifting clamp to rise and fall, thereby driving the linkage member 33 to rise and fall. The rotary drive mechanism can be a combination of a motor, a turntable, and a lever. The motor drives the turntable to rotate, thereby driving the lever set on the edge of the turntable to move circumferentially with the center of the turntable as the rotation axis, thereby turning the rotary handle 43 to rotate. Of course, other mechanisms can also be used for driving in other embodiments, which will not be repeated here. In this way, the sub-packaging filling machine in this embodiment can be used to accurately discharge and pack the color paste of the same color, thereby realizing precise quantitative packing.

[0051] To sum up, by rotating the valve core part 41, two discharging modes, large discharging and small discharging, can be achieved. In the small discharging state, the small pump pipeline part 31 performs small discharging through the valve core part 41, and the amount of color paste it can discharge is the capacity of the small pump pipeline part 31. Since the small pump pipeline part 31 and the large pump pipeline part 21 are arranged side by side and independent of each other, it is convenient to set a small pump pipeline part 31 with a larger capacity, thereby increasing the total amount of color material that can be injected at one time in the small discharging state, improving the discharging efficiency, and the small pump piston part 32 always moves in the small pump pipeline part 31, avoiding collision and wear of the small pump piston part 32 due to repeated entry and exit of the small pump pipeline part 31, thereby extending the service life. At the same time, through the setting of the linkage part 33, only one driving source is needed to drive the large pump piston part 22 and the small pump piston part 32 to move synchronously, and in the small discharging state, the large pump pipeline part 21 is connected with the barrel assembly 1 through the valve core part 41, that is, the color paste in the small pump pipeline part 31 is used for small discharging, and the color paste in the large pump pipeline part 21 can flow back to the barrel assembly 1 to complete the pressure relief, thereby improving the stability of the discharging.

[0052] 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 metering pump with large and small capacity discharging at the same time, characterized in that: include: A barrel assembly (1) containing color paste; A large pump assembly (2) includes a large pump pipe member (21) and a large pump piston member (22), one end of the large pump piston member (22) is movably inserted into the large pump pipe member (21), and the other end of the large pump piston member (22) is located outside the large pump pipe member (21); A small pump assembly (3), comprising a small pump pipe member (31), a small pump piston member (32) and a linkage member (33), wherein the small pump pipe member (31) is arranged side by side beside the large pump pipe member (21), one end of the small pump piston member (32) is movably inserted into the small pump pipe member (31), and the other end of the small pump piston member (32) is located outside the small pump pipe member (31), and two ends of the linkage member (33) are respectively connected to the other end of the large pump piston member (22) and the other end of the small pump piston member (32); as well as A material valve assembly (4) comprises a valve core (41) and a material valve pipeline (42), wherein the valve core (41) is rotatably arranged on the material valve pipeline (42), and the material valve pipeline (42) is respectively connected to the barrel assembly (1), the large pump pipeline (21) and the small pump pipeline (31); after rotation, the valve core (41) has a large discharge state and a small discharge state, wherein in the large discharge state, the large pump pipeline (21) and the small pump pipeline (31) are simultaneously connected to the valve core (41), and large discharge is performed through the valve core (41); in the small discharge state, the large pump pipeline (21) is connected to the barrel assembly (1) through the valve core (41), and the small pump pipeline (31) is small discharged through the valve core (41).

2. The high-precision metering pump with large and small capacity simultaneous discharge according to claim 1 is characterized in that: The material valve pipeline component (42) includes a valve core pipeline (421), a feed pipeline (422), a first pressure pump pipeline (423) and a second pressure pump pipeline (424). The valve core component (41) is rotatably arranged in the valve core pipeline (421). One end of the feed pipeline (422) is communicated with the barrel assembly (1), and the other end of the feed pipeline (422) is in contact with the sealing surface (411) of the valve core component (41). The channel (423) is connected to the large pump pipeline (21) and the valve core pipeline (421) respectively, one end of the second pressure pump pipeline (424) is connected to the small pump pipeline (31), and the other end of the second pressure pump pipeline (424) is in contact with the conversion surface (412) of the valve core component (41), and a discharge port (4211) is provided at the bottom of the valve core pipeline (421), and the discharge port (4211) is in contact with the conversion surface (412).

3. The high-precision metering pump with large and small capacity simultaneous discharge according to claim 2 is characterized in that: The valve core (41) is provided with a large flow channel (413), a small flow channel (414), a feed channel (415) and a pressing channel (416), wherein the large flow channel (413) has a first port (4131) and a second port (4132), wherein the first port (4131) is in communication with the valve core pipe (421), and the second port (4132) is provided on the conversion surface (412), and the feed channel (415) has a fourth port (4151), a fifth port (4152) and a sixth port (4153), wherein the four ports ( The first and second ports (4151 and 4152) are respectively opened on the sealing surface (411) and the conversion surface (412), the sixth port (4153) is communicated with the valve core pipeline (421), the two ports of the small flow channel (414) are respectively opened on the two opposite sides of the conversion surface (412), the pressing channel (416) has a seventh port (4161) and an eighth port (4162), the seventh port (4161) is opened on the conversion surface (412), and the eighth port (4162) is communicated with the valve core pipeline (421).

4. The high-precision metering pump with large and small capacity simultaneous discharge according to claim 3 is characterized in that: The large flow channel (413) further has a third port (4133), and the third port (4133) is opened on the sealing surface (411).

5. The high-precision metering pump with large and small capacity simultaneous discharge according to claim 1 is characterized in that: The small pump assembly (3) further comprises a stabilizing member (34), one end of which is fixed to the outer wall of the barrel assembly (1), and the other end of which is fixedly connected to the large pump pipeline member (21) and the small pump pipeline member (31), respectively.

6. The high-precision metering pump with large and small capacity simultaneous discharge according to claim 2 is characterized in that: The material valve pipeline (42) further comprises at least two fixing blocks (425), and the at least two fixing blocks (425) are respectively arranged at two opposite ends of the valve core pipeline (421), and each of the fixing blocks (425) is provided with a threaded hole.

7. The high-precision metering pump with large and small capacity simultaneous discharge according to claim 2, characterized in that: The valve core pipeline (421) includes a valve core pipeline body (4212) and a bottom cover (4213), wherein the bottom cover (4213) is detachably mounted on the bottom of the valve core pipeline body (4212), and the valve core member (41) is rotatably disposed in the valve core pipeline body (4212). The valve core pipeline body (4212) is communicated with the first pressure pump pipeline (423), and the discharge port (4211) is opened on the bottom cover (4213).

8. The high-precision metering pump with large and small capacity simultaneous discharge according to claim 7, characterized in that: The outer wall ring of the bottom cover (4213) is provided with a third thread, and the inner wall ring of the bottom of the valve core pipe body (4212) is provided with a fourth thread. The bottom cover (4213) is detachably installed on the bottom of the valve core pipe body (4212) through the cooperation of the third thread and the fourth thread.

9. A color mixing machine, characterized in that: It comprises a high-precision metering pump with large and small capacities and capable of discharging materials simultaneously as described in any one of claims 1 to 8.

10. A filling and packaging machine, characterized in that: It comprises a high-precision metering pump with large and small capacities and capable of discharging materials simultaneously as described in any one of claims 1 to 8.

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