Color paste pump and color mixer

Abstract

The utility model provides a color paste pump and a color mixer. The color paste pump comprises a control valve and a pump body structure, and the pump body structure comprises a first pump body; a second pump body; the piston rod is provided with a first piston and a second piston; a first access channel is formed in the bottom of the first pump body; the second pump body is provided with a second access channel; the control valve comprises a valve body and a valve element, the valve body is provided with a backflow channel, and the valve element is provided with a color paste injection port, a first axis channel, a second axis channel, a first radial injection-out channel and a second radial injection-out channel. The first in-out channel and the second in-out channel are respectively communicated with the color paste injection port through the axis channel, the radial injection-out channel and the backflow channel; and when the valve element rotates to a second preset position, the second inlet and outlet channel communicates with the color paste injection opening through the axis channel, the radial injection-out channel and the backflow channel. The color paste pump solves the problem that in the prior art, a color paste pump is prone to being abraded by color paste to cause leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of color mixing equipment, in particular to a color paste pump and a color mixing machine. Background Art

[0002] At present, the existing color paste pump can not only ensure the accuracy of 0.015ml small-meter color paste injection, but also realize large-meter color paste injection, and at the same time has an effective structure to prevent the color paste secondary outlet from being blocked. However, in actual use, it is found that since the color paste contains powder solid matter, this powder solid matter has a certain wear effect on the valve body and valve core of the color paste pump, especially the minerals such as iron red and iron yellow in the color paste will have a certain wear on the valve body and valve core made of organic resin materials when used without lubricating oil. This wear after long-term use will cause the sealing of the color paste pump to decrease, and for some color pastes with low viscosity, it will cause certain leakage, increase the number of automatic cleaning times of the injection nozzle of the color paste pump, and increase the number of daily maintenance and replacement of the cleaning liquid in the color mixing machine, making it inconvenient for customers to use.

[0003] As can be seen from the above, in the prior art, there is a problem that the color paste pump is easily worn by the color paste and causes leakage. Utility Model Content

[0004] The main purpose of the utility model is to provide a color paste pump and a color mixing machine to solve the problem in the prior art that the color paste pump is easily worn by the color paste and causes leakage.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a color paste pump is provided, including a control valve and a pump body structure, the control valve is connected to the pump body structure and the color paste barrel in an on-off manner, and is used to enable the pump body structure to draw color paste from the color paste barrel or inject color paste, the pump body structure includes: a first pump body; a second pump body, the second pump body is coaxially arranged with the first pump body and is located at the bottom of the first pump body; a piston rod, the lower end of the piston rod is provided with a first piston and a second piston at intervals, the first piston is used to seal the first pump body, and the second piston is used to seal the second pump body; a first inlet and outlet channel is opened at the bottom of the first pump body, the first inlet and outlet channel is connected to the first pump body and the control valve, the second pump body has a second inlet and outlet channel, the second inlet and outlet channel is connected to the second pump body and the control valve; the control valve includes a valve body and a valve core, the valve core is rotatably arranged relative to the valve body, The valve body has a reflux channel, and the valve core has a color paste injection port, a first axial channel, a second axial channel, and a first radial outlet channel and a second radial outlet channel that are perpendicular to each other, wherein when the valve core rotates to a closed position, none of the channels in the valve core is connected to the valve body or the channels in the pump body structure; when the valve core rotates to a first preset position, the first inlet and outlet channels and the second inlet and outlet channels are connected to the color paste injection port through the first axial channel, the first radial outlet channel, the reflux channel, and the second axial channel, respectively, so as to allow the color paste in the first pump body and the second pump body to flow back to the color paste barrel, respectively; when the valve core rotates to a second preset position, the second inlet and outlet channels are connected to the color paste injection port through the first axial channel, the second radial outlet channel, the reflux channel, and the second axial channel, so as to allow the color paste in the second pump body to flow back to the color paste barrel.

[0006] Furthermore, the valve core also has a first radial channel and a second radial channel. When the valve core rotates to the first preset position, the first inlet and outlet channel and the second inlet and outlet channel are connected to the first axial channel through the first radial channel and the second radial channel respectively.

[0007] Furthermore, the valve core also has a third radial channel and a fourth radial channel. When the valve core rotates to the first preset position, the reflux channel is connected to the second axial channel through the third radial channel and the fourth radial channel respectively.

[0008] Furthermore, the valve core also has a fifth radial channel and a sixth radial channel. When the valve core rotates to the second preset position, the second inlet and outlet channel is connected to the first axial channel through the fifth radial channel, and the return channel is connected to the second axial channel through the third radial channel and the sixth radial channel respectively.

[0009] Furthermore, a third inlet and outlet channel is opened at the bottom of the first pump body, and the valve core also has a seventh radial channel v. When the valve core rotates to the second preset position, the third inlet and outlet channel is connected to the color paste injection port through the seventh radial channel v and the second axial channel.

[0010] Furthermore, a third inlet and outlet channel is opened at the bottom of the first pump body, and the valve core also has an eighth radial channel and a ninth radial channel. When the valve core rotates to the third preset position, the second inlet and outlet channel is connected with the color paste injection port through the eighth radial channel and the second axial channel, and the third inlet and outlet channel is connected with the color paste injection port through the ninth radial channel and the second axial channel.

[0011] Furthermore, the valve body also has a color paste injection outlet, and the valve core also has a tenth radial channel and an eleventh radial channel. When the valve core rotates to a fourth preset position, the first inlet and outlet channel is connected to the color paste injection outlet through the tenth radial channel, the first axial channel and the first radial injection channel, and the second inlet and outlet channel is connected to the color paste injection outlet through the eleventh radial channel, the first axial channel and the first radial injection channel.

[0012] Furthermore, a third inlet and outlet channel is provided at the bottom of the first pump body, the valve body also has a color paste injection outlet, and the valve core also has a twelfth radial channel and a thirteenth radial channel. When the valve core rotates to the fifth preset position, the second inlet and outlet channel is connected with the color paste injection outlet through the twelfth radial channel, the first axial channel and the second radial injection channel, and the third inlet and outlet channel is connected with the color paste injection port through the thirteenth radial channel and the second axial channel.

[0013] Furthermore, the valve body also has a color paste injection outlet, and when the valve core rotates to a closed position, the first radial injection channel and the second radial injection channel are located on a side of the valve core away from the color paste injection outlet.

[0014] Further, the cross-sectional area of ​​the first radial injection channel is greater than the cross-sectional area of ​​the second radial injection channel.

[0015] According to another aspect of the utility model, a color mixing machine is provided, comprising the above-mentioned color paste pump.

[0016] Applying the technical solution of the utility model, the color paste pump includes a control valve and a pump body structure, the control valve is connected to the pump body structure and the color paste barrel in an on-off manner, and is used to enable the pump body structure to draw color paste from the color paste barrel or inject color paste, the pump body structure includes a first pump body, a second pump body and a piston rod, the second pump body is coaxially arranged with the first pump body and is located at the bottom of the first pump body, the lower end of the piston rod is spaced apart with a first piston and a second piston, the first piston is used to seal the first pump body, the second piston is used to seal the second pump body, the bottom of the first pump body is provided with a first inlet and outlet channel, the first inlet and outlet channel is connected to the first The pump body and the control valve, the second pump body has a second inlet and outlet channel, and the second inlet and outlet channel communicates with the second pump body and the control valve; the control valve includes a valve body and a valve core, the valve core is rotatably arranged relative to the valve body, the valve body has a reflux channel, the valve core has a color paste injection port, a first axial channel, a second axial channel, and a first radial injection channel and a second radial injection channel that are perpendicular to each other. When the valve core is rotated to a closed position, the channels in the valve core are not connected to the valve body or the channels in the pump body structure; when the valve core is rotated to a first preset position, the first inlet and outlet channel and the second inlet and outlet channel are respectively connected through the first inlet and outlet channel. The first axial channel, the first radial outlet channel, the reflux channel, and the second axial channel are connected with the color paste injection port, and are used to make the color paste in the first pump body and the second pump body flow back to the color paste barrel respectively; when the valve core rotates to the second preset position, the second inlet and outlet channel is connected with the color paste injection port through the first axial channel, the second radial outlet channel, the reflux channel, and the second axial channel, and is used to make the color paste in the second pump body flow back to the color paste barrel. In this way, when the valve core is in the closed position, each channel cannot be connected with the color paste injection port, thereby improving the sealing performance of the control valve. In addition, by The angle between the injection channel and the second radial injection channel is set to 90°, so that the distance between the large and small injection nozzles and the color paste injection outlet is increased when the valve core is in the closed position, and the sealing of the control valve is also increased. Furthermore, through the two preset rotation positions of the valve core, the reflux of the large and small injection nozzles is respectively realized, so that the reflux flow of the large and small injection nozzle pipes is large and the reflux effect is good, thereby minimizing the color paste residue in the control valve, preventing the color paste from causing wear on the control valve and causing leakage, and solving the problem that the color paste pump is easily worn by the color paste and causes leakage in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A schematic diagram showing the structure of a color paste pump in a specific embodiment of the utility model is shown; and

[0019] Figure 2A schematic diagram of the structure of a color paste pump at the connection between the valve body and the pump body structure in a specific embodiment of the utility model is shown;

[0020] Figure 3 A schematic diagram showing the structure of a valve core in a specific embodiment of the utility model is shown;

[0021] Figure 4 A schematic diagram showing the structure of a valve core in a specific embodiment of the utility model when the valve core is located at a first preset position;

[0022] Figure 5 A schematic diagram showing the structure of a valve core in a specific embodiment of the utility model when the valve core is located at a second preset position;

[0023] Figure 6 A schematic diagram showing the structure of a valve core in a specific embodiment of the utility model when the valve core is located at a third preset position;

[0024] Figure 7 A schematic diagram showing the structure of a valve core in a specific embodiment of the utility model when the valve core is located at a fourth preset position;

[0025] Figure 8 A structural schematic diagram is shown when the valve core in a specific embodiment of the utility model is located at the fifth preset position.

[0026] The above drawings include the following reference numerals:

[0027] 10. First pump body; 11. First inlet and outlet channel; 12. Third inlet and outlet channel; 20. Second pump body; 21. Second inlet and outlet channel; 30. Piston rod; 31. Second piston; 40. Valve stem; 50. Valve body; 51. Reflow channel; 52. Color paste outlet; 60. Valve core; 61. Color paste inlet; 601. First axial channel; 602. Second axial channel; 603. First radial outlet channel; 604. Second radial outlet channel; 605. First radial channel; 606. Second radial channel; 607. Third radial channel; 608. Fourth radial channel; 609. Fifth radial channel; 610. Sixth radial channel; 611. Seventh radial channel; 612. Eighth radial channel; 613. Ninth radial channel; 614. Tenth radial channel; 615. Eleventh radial channel; 616. Twelfth radial channel; 617. Thirteenth radial channel. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0030] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0031] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0032] In order to solve the problem in the prior art that a color paste pump is easily worn out by color paste and causes leakage, the utility model provides a color paste pump and a color mixing machine.

[0033] like Figures 1 to 8As shown, the color paste pump includes a control valve and a pump body structure, and the control valve is connected to the pump body structure and the color paste barrel in an on-off manner, and is used to allow the pump body structure to draw color paste from the color paste barrel or inject color paste. The pump body structure includes a first pump body 10, a second pump body 20 and a piston rod 30. The second pump body 20 is coaxially arranged with the first pump body 10 and is located at the bottom of the first pump body 10. The lower end of the piston rod 30 is provided with a first piston and a second piston 31, the first piston is used to seal the first pump body 10, and the second piston 31 is used to seal the second pump body 20. The bottom of the first pump body 10 is provided with a first inlet and outlet channel 11, and the first inlet and outlet channel 11 is connected to the first pump body 10 and the control valve. The second pump body 20 has a second inlet and outlet channel 21, and the second inlet and outlet channel 21 is connected to the second pump body 20 and the control valve. The control valve includes a valve body 50 and a valve core 60, and the valve core 60 is rotatably arranged relative to the valve body 50. The valve body 50 has a reflux channel 51 , and the valve core 60 has a color paste injection port 61 , a first axial channel 601 , a second axial channel 602 , and a first radial outlet channel 603 and a second radial outlet channel 604 that are perpendicular to each other. Among them, when the valve core 60 rotates to the closed position, the channels in the valve core 60 are not connected with the channels in the valve body 50 or the pump body structure; when the valve core 60 rotates to the first preset position, the first inlet and outlet channel 11 and the second inlet and outlet channel 21 are connected to the color paste injection port 61 through the first axial channel 601, the first radial injection channel 603, the reflux channel 51, and the second axial channel 602 respectively, so as to make the color paste in the first pump body 10 and the second pump body 20 flow back to the color paste barrel respectively; when the valve core 60 rotates to the second preset position, the second inlet and outlet channel 21 is connected to the color paste injection port 61 through the first axial channel 601, the second radial injection channel 604, the reflux channel 51, and the second axial channel 602, so as to make the color paste in the second pump body 20 flow back to the color paste barrel.

[0034] Through the above arrangement, when the valve core 60 is in the closed position, each channel cannot be connected to the color paste injection port 61, thereby improving the sealing performance of the control valve. Furthermore, through the two preset rotation positions of the valve core 60, the reflux of the large and small injection nozzles is realized respectively, so that the reflux flow rate of the large and small injection nozzle pipelines is large and the reflux effect is good, thereby minimizing the color paste residue in the control valve and preventing the color paste from causing wear on the control valve and leakage.

[0035] In this embodiment, the cross-sectional area of ​​the first radial injection channel 603 is greater than the cross-sectional area of ​​the second radial injection channel 604. That is, the first radial injection channel 603 is a large injection nozzle of the color paste pump, and the second radial injection channel 604 is a small injection nozzle of the color paste pump.

[0036] It can be understood that the axial channel is a channel extending along the central axis of the valve core 60. In this embodiment, the second axial channel 602 is spaced apart from the first axial channel 601. That is, the second axial channel 602 is not connected to the first axial channel 601.

[0037] like Figures 3 to 8 As shown, in this embodiment, the control valve further includes a valve stem 40. The valve stem 40 is drivingly connected to the valve core 60 and is located outside the valve body 50, thereby driving the valve core 60 to rotate in the valve body 50. Further, a driving pin is provided on the valve stem 40, so as to facilitate the operation of the valve stem 40 to rotate.

[0038] In this embodiment, if Figures 7 and 8 As shown, the valve body 50 also has a color paste injection outlet 52, and when the valve core 60 rotates to the closed position, the first radial injection channel 603 and the second radial injection channel 604 are located on the side of the valve core 60 away from the color paste injection outlet 52. Specifically, when the valve core 60 is in the closed position, the valve stem 40 is in a horizontal state, and at this time, the first radial injection channel 603 and the second radial injection channel 604 are in a symmetrical state relative to the mid-perpendicular line of the valve core 60. Through the above setting, the angle between the first radial injection channel 603 and the second radial injection channel 604 is set to 90°, so that the distance between the large and small injection nozzles and the color paste injection outlet 52 is increased when the valve core 60 is in the closed position, and the sealing performance of the control valve is also improved.

[0039] like Figure 4 As shown, in this embodiment, the valve core 60 also has a first radial channel 605 and a second radial channel 606. When the valve core 60 rotates to the first preset position, the first inlet and outlet channel 11 and the second inlet and outlet channel 21 are connected to the first axial channel 601 through the first radial channel 605 and the second radial channel 606 respectively.

[0040] like Figure 4 As shown, in this embodiment, the valve core 60 also has a third radial channel 607 and a fourth radial channel 608. When the valve core 60 rotates to the first preset position, the return channel 51 is connected to the second axial channel 602 through the third radial channel 607 and the fourth radial channel 608 respectively. That is to say, when the valve core 60 is located at the first preset position, the first inlet and outlet channel 11 is connected to the color paste injection port 61 through the first radial channel 605, the first axial channel 601, the first radial injection channel 603, the return channel 51, the third radial channel 607 and the fourth radial channel 608, and the second axial channel 602 in sequence. It can be understood that the first preset position is the position where the large pump body, the small pump body, and the large injection nozzle return the color paste.

[0041] like Figure 5As shown, in this embodiment, the valve core 60 further has a fifth radial channel 609 and a sixth radial channel 610. When the valve core 60 rotates to the second preset position, the second inlet and outlet channel 21 is connected to the first axial channel 601 through the fifth radial channel 609. The return channel 51 is connected to the second axial channel 602 through the third radial channel 607 and the sixth radial channel 610. That is, when the valve core 60 is located at the second preset position, the second inlet and outlet channel 21 is connected to the color paste injection port 61 through the fifth radial channel 609, the first axial channel 601, the second radial injection channel 604, the return channel 51, the third radial channel 607 and the sixth radial channel 610, and the second axial channel 602 in sequence.

[0042] like Figure 5 As shown, in this embodiment, the bottom of the first pump body 10 is provided with a third inlet and outlet channel 12, and the valve core 60 also has a seventh radial channel 611. When the valve core 60 rotates to the second preset position, the third inlet and outlet channel 12 is connected to the color paste injection port 61 through the seventh radial channel 611 and the second axial channel 602, so that the color paste in the first pump body 10 flows back to the color paste barrel. It can be understood that the second preset position is the position where the large pump body, the small pump body, and the small injection nozzle return the color paste.

[0043] In this embodiment, the valve body 50 is provided with through holes corresponding to the three inlet and outlet channels, so that the three inlet and outlet channels are connected to the inner side surface of the valve body 50 .

[0044] In this embodiment, the reflux channel 51 is a U-shaped channel, and the opening of the U-shaped channel faces the color paste injection port 61. Specifically, the bottom and two opening ends of the reflux channel 51 have openings, wherein the bottom opening is located in the same rotation plane as the first radial injection channel 603 and the second radial injection channel 604 to achieve communication with the first radial injection channel 603 and the second radial injection channel 604. The openings at the two opening ends are located in the same rotation plane as the third radial channel 607, the fourth radial channel 608, and the sixth radial channel 610 to achieve communication with the three radial channels.

[0045] like Figure 6As shown, the valve core 60 also has an eighth radial channel 612 and a ninth radial channel 613. When the valve core 60 rotates to the third preset position, the second inlet and outlet channel 21 is connected to the color paste injection port 61 through the eighth radial channel 612 and the second axial channel 602, and the third inlet and outlet channel 12 is connected to the color paste injection port 61 through the ninth radial channel 613 and the second axial channel 602. Specifically, the third preset position is the color paste suction position, which is also the channel state of the color paste pump sucking the color paste from the color paste barrel into the pump body structure. At this time, the first piston first descends, and then the first piston is pulled upward to cause the color paste in the color paste barrel to be sucked into the first pump body 10 and the second pump body 20 from the color paste injection port 61. After sucking a certain amount of color paste, the first piston drives the second piston 31 together and is pressed down by the piston rod head at the top of the piston rod 30 by the driving component, so that the color paste flows back into the color paste barrel.

[0046] like Figure 7 As shown, in this embodiment, the valve core 60 further has a tenth radial channel 614 and an eleventh radial channel 615. When the valve core 60 rotates to the fourth preset position, the first inlet and outlet channel 11 is connected to the color paste outlet 52 through the tenth radial channel 614, the first axial channel 601 and the first radial outlet channel 603, and the second inlet and outlet channel 21 is connected to the color paste outlet 52 through the eleventh radial channel 615, the first axial channel 601 and the first radial outlet channel 603. In other words, the fourth preset position is the position where the large pump body, the small pump body and the large outlet nozzle of the color paste pump inject the color paste.

[0047] like Figure 8 As shown, in this embodiment, the valve core 60 also has a twelfth radial channel 616 and a thirteenth radial channel 617. When the valve core 60 rotates to the fifth preset position, the second inlet and outlet channel 21 is connected to the color paste outlet 52 through the twelfth radial channel 616, the first axial channel 601 and the second radial outlet channel 604, and the third inlet and outlet channel 12 is connected to the color paste injection port 61 through the thirteenth radial channel 617 and the second axial channel 602. In other words, the fifth preset position is the position where the large pump body, the small pump body and the small injection nozzle of the color paste pump inject the color paste.

[0048] In this embodiment, the closed position, the first preset position, the second preset position, the third preset position, the fourth preset position and the fifth preset position are positions where the valve core 60 rotates at different angles. Specifically, based on the state of the valve stem 40, when in the closed position, the valve stem 40 is in a horizontal state. When executing the reflux procedure, the valve stem 40 first rotates 90° clockwise, then switches from the closed position to the third preset position for absorbing the color paste, then rotates 45° counterclockwise, then switches to the first preset position, the large mouth reflux position, and then continues to rotate 90° counterclockwise, then switches to the second preset position, the small mouth reflux position. When executing the large mouth injection procedure, the valve stem 40 first rotates 90° clockwise, then switches from the closed position to the third preset position for absorbing the color paste, then rotates 225° counterclockwise, then switches to the fourth preset position, the large mouth injection position. When executing the small nozzle injection procedure, the valve stem 40 first rotates 90° clockwise to switch from the closed position to the third preset position for absorbing color paste, and then rotates 45° clockwise to switch to the fifth preset position for small nozzle injection.

[0049] In this embodiment, the first radial channel 605 and the tenth radial channel 614 are located in the same rotation plane; the second radial channel 606, the fifth radial channel 609, the eleventh radial channel 615 and the twelfth radial channel 616 are located in the same rotation plane; the seventh radial channel 611, the ninth radial channel 613 and the thirteenth radial channel 617 are also located in the same rotation plane.

[0050] The present application also provides a color mixing machine, comprising the above-mentioned color paste pump, wherein the color paste pump is connected to the color paste barrel.

[0051] From the above description, it can be seen that the above-mentioned embodiments of the utility model achieve the following technical effects: the color paste pump includes a control valve and a pump body structure, the control valve is connected to the pump body structure and the color paste barrel in an on-off manner, and is used to enable the pump body structure to draw color paste from the color paste barrel or inject color paste, the pump body structure includes a first pump body 10, a second pump body 20 and a piston rod 30, the second pump body 20 is coaxially arranged with the first pump body 10 and is located at the bottom of the first pump body 10, and the lower end of the piston rod 30 is spaced apart with a first piston and a second piston 31, the first piston is used to seal the first pump body 10, and the second piston 31 is used to seal the second pump body 10. Two pump bodies 20, the first pump body 10 has a first inlet and outlet channel 11 at the bottom, the first inlet and outlet channel 11 connects the first pump body 10 and the control valve, the second pump body 20 has a second inlet and outlet channel 21, the second inlet and outlet channel 21 connects the second pump body 20 and the control valve, the control valve includes a valve body 50 and a valve core 60, the valve core 60 is rotatably arranged relative to the valve body 50, the valve body 50 has a reflux channel 51, the valve core 60 has a color paste injection port 61, a first axial channel 601, a second axial channel 602, and a first radial injection channel 603 and a second radial injection channel 604 perpendicular to each other, wherein When the valve core 60 rotates to the closed position, none of the channels in the valve core 60 is connected to the valve body 50 or the channels in the pump body structure; when the valve core 60 rotates to the first preset position, the first inlet and outlet channel 11 and the second inlet and outlet channel 21 are connected to the color paste injection port 61 through the first axial channel 601, the first radial injection channel 603, the reflux channel 51, and the second axial channel 602, respectively, so as to make the color paste in the first pump body 10 and the second pump body 20 flow back to the color paste barrel; when the valve core 60 rotates to the second preset position, the second inlet and outlet channel 21 is connected to the color paste injection port 61 through the first axial channel 601, the second radial injection channel 603, the reflux channel 51, and the second axial channel 602, respectively. The injection channel 604, the reflux channel 51, the second axial channel 602 are connected to the color paste injection port 61, so as to allow the color paste in the second pump body 20 to flow back to the color paste barrel. In this way, when the valve core 60 is in the closed position, each channel cannot be connected to the color paste injection port 61, thereby improving the sealing performance of the control valve. Furthermore, through the two preset rotation positions of the valve core 60, the reflux of the large and small injection nozzles is realized respectively, so that the reflux flow rate of the large and small injection nozzle pipelines is large and the reflux effect is good, thereby minimizing the residual color paste in the control valve and preventing the color paste from causing wear on the control valve and leakage.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0053] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0054] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A color paste pump, characterized in that: The invention comprises a control valve and a pump structure, wherein the control valve is connected to the pump structure and the color paste barrel in an on-off manner, and is used to allow the pump structure to draw color paste from the color paste barrel or to inject the color paste. The pump structure comprises: A first pump body (10); a second pump body (20), the second pump body (20) being coaxially arranged with the first pump body (10) and located at the bottom of the first pump body (10); A piston rod (30), wherein a first piston and a second piston (31) are arranged at a distance from each other at the lower end of the piston rod (30), wherein the first piston is used to seal the first pump body (10), and the second piston (31) is used to seal the second pump body (20); The first pump body (10) has a first inlet and outlet channel (11) at the bottom thereof, the first inlet and outlet channel (11) being in communication with the first pump body (10) and the control valve, and the second pump body (20) has a second inlet and outlet channel (21), the second inlet and outlet channel (21) being in communication with the second pump body (20) and the control valve; The control valve comprises a valve body (50) and a valve core (60), wherein the valve core (60) is rotatably arranged relative to the valve body (50), the valve body (50) has a reflux channel (51), and the valve core (60) has a color paste injection port (61), a first axial channel (601), a second axial channel (602), and a first radial injection channel (603) and a second radial injection channel (604) which are perpendicular to each other, wherein: When the valve core (60) rotates to the closed position, none of the channels in the valve core (60) is connected to the valve body (50) or the channels in the pump body structure; when the valve core (60) rotates to the first preset position, the first inlet and outlet channel (11) and the second inlet and outlet channel (21) are connected to the color paste injection port (61) through the first axial channel (601), the first radial injection channel (603), the reflux channel (51), and the second axial channel (602), respectively, so as to make the color paste in the first pump body (10) and the second pump body (20) flow back to the color paste barrel; when the valve core (60) rotates to the second preset position, the second inlet and outlet channel (21) is connected to the color paste injection port (61) through the first axial channel (601), the second radial injection channel (604), the reflux channel (51), and the second axial channel (602), so as to make the color paste in the second pump body (20) flow back to the color paste barrel.

2. The color paste pump according to claim 1, characterized in that: The valve core (60) also has a first radial channel (605) and a second radial channel (606). When the valve core (60) rotates to the first preset position, the first inlet and outlet channel (11) and the second inlet and outlet channel (21) are connected to the first axial channel (601) through the first radial channel (605) and the second radial channel (606), respectively.

3. The color paste pump according to claim 1, characterized in that: The valve core (60) also has a third radial channel (607) and a fourth radial channel (608). When the valve core (60) rotates to the first preset position, the return channel (51) is connected to the second axial channel (602) through the third radial channel (607) and the fourth radial channel (608) respectively.

4. The color paste pump according to claim 3, characterized in that: The valve core (60) also has a fifth radial channel (609) and a sixth radial channel (610). When the valve core (60) rotates to the second preset position, the second inlet and outlet channel (21) is connected to the first axial channel (601) through the fifth radial channel (609), and the return channel (51) is connected to the second axial channel (602) through the third radial channel (607) and the sixth radial channel (610).

5. The color paste pump according to claim 1, characterized in that: A third inlet and outlet channel (12) is provided at the bottom of the first pump body (10), and the valve core (60) also has a seventh radial channel (611). When the valve core (60) rotates to the second preset position, the third inlet and outlet channel (12) is connected to the color paste injection port (61) through the seventh radial channel (611) and the second axial channel (602).

6. The color paste pump according to claim 1, characterized in that: The bottom of the first pump body (10) is also provided with a third inlet and outlet channel (12), and the valve core (60) also has an eighth radial channel (612) and a ninth radial channel (613). When the valve core (60) rotates to a third preset position, the second inlet and outlet channel (21) is communicated with the color paste injection port (61) via the eighth radial channel (612) and the second axial channel (602), and the third inlet and outlet channel (12) is communicated with the color paste injection port (61) via the ninth radial channel (613) and the second axial channel (602).

7. The color paste pump according to claim 1, characterized in that: The valve body (50) further comprises a color paste injection outlet (52), and the valve core (60) further comprises a tenth radial channel (614) and an eleventh radial channel (615). When the valve core (60) rotates to a fourth preset position, the first inlet and outlet channel (11) is connected to the color paste injection outlet (52) via the tenth radial channel (614), the first axial channel (601) and the first radial injection channel (603), and the second inlet and outlet channel (21) is connected to the color paste injection outlet (52) via the eleventh radial channel (615), the first axial channel (601) and the first radial injection channel (603).

8. The color paste pump according to claim 1, characterized in that: A third inlet and outlet channel (12) is provided at the bottom of the first pump body (10); the valve body (50) also has a color paste injection port (52); the valve core (60) also has a twelfth radial channel (616) and a thirteenth radial channel (617); when the valve core (60) rotates to a fifth preset position, the second inlet and outlet channel (21) is connected to the color paste injection port (52) via the twelfth radial channel (616), the first axial channel (601) and the second radial injection channel (604); and the third inlet and outlet channel (12) is connected to the color paste injection port (61) via the thirteenth radial channel (617) and the second axial channel (602).

9. The color paste pump according to claim 1, characterized in that: The valve body (50) also has a color paste injection outlet (52), and when the valve core (60) rotates to the closed position, the first radial injection channel (603) and the second radial injection channel (604) are located on a side of the valve core (60) away from the color paste injection outlet (52).

10. The color paste pump according to any one of claims 1 to 9, characterized in that: The cross-sectional area of ​​the first radial injection channel (603) is greater than the cross-sectional area of ​​the second radial injection channel (604).

11. A color mixing machine, characterized in that: The invention comprises the color paste pump according to any one of claims 1 to 10.

Images