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 which are respectively used for sealing the first pump body and the second pump body; the sealing pipe is located at the bottom in the first pump body and provided with a first inlet and outlet channel, the first inlet and outlet channel communicates with the first pump body and the control valve, and the first inlet and outlet channel is blocked when the first piston abuts against the sealing pipe for limiting; the control valve comprises a valve body and a valve element, the valve element is rotatably arranged relative to the valve body, the control valve is provided with a backflow channel and a color paste injection port, and the valve element is provided with a first radial outpouring channel and a second radial outpouring channel. The first inlet and outlet channel is communicated with the color paste injection opening through the backflow channel, the first radial injection-out channel and the second radial injection-out channel when the valve element rotates to a first preset position. 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 sealing tube, the sealing tube is located at the bottom of the first pump body and is spaced apart from the second pump body, The sealing tube has a first inlet and outlet channel, which is connected to the first pump body and the control valve. The first inlet and outlet channel is blocked when the first piston abuts against the sealing tube to limit the position; 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, the color paste injection port is connected to the color paste barrel, the valve core has a first radial outlet channel and a second radial outlet channel extending along the same straight line, and the first inlet and outlet channel is connected to the color paste injection port through the reflux channel, the first radial outlet channel and the second radial outlet channel when the valve core rotates to the first preset position, so as to make the color paste in the first pump body flow back to the color paste barrel.

[0006] Furthermore, the reflux channel includes a first reflux channel and a second reflux channel, the first reflux channel and the second reflux channel are respectively located on both sides of the valve body and are located in the same plane, and the valve core also has an arc groove channel. When the valve core rotates to a first preset position, the arc groove channel is respectively connected to the first inlet and outlet channel and the first reflux channel, and the second reflux channel is connected to the second radial injection channel.

[0007] Furthermore, the valve core also has a first axial channel and a first radial channel. When the valve core rotates to the first preset position, the second reflux channel is connected to the color paste injection port through the first radial channel and the first axial channel.

[0008] Furthermore, the second pump body has a second inlet and outlet channel, and the valve core also has a first axial channel and a second radial channel. When the valve core rotates to a first preset position, the second inlet and outlet channel is connected to the color paste injection port through the second radial channel and the first axial channel, so as to allow the color paste in the second pump body to flow back to the color paste barrel.

[0009] Furthermore, a third inlet and outlet channel is provided at the bottom of the first pump body, and the valve core also has a first axial channel, a second axial channel, a third radial channel and a fourth radial channel. The second axial channel and the third radial channel are symmetrically arranged with respect to the first axial channel and the second radial channel respectively, and the fourth radial channel is connected in parallel with the first axial channel and the second axial channel. When the valve core rotates to a closed position, the second inlet and outlet channel is connected to the color paste injection port through the third radial channel, the second axial channel and / or the first axial channel, and the third inlet and outlet channel is connected to the color paste injection port through the fourth radial channel, the second axial channel and / or the first axial channel.

[0010] Furthermore, the valve body also has a color paste injection port, and the valve core also has a second axial channel, a fifth radial channel and a sixth radial channel. When the valve core rotates to a second preset position, the third inlet and outlet channel is connected to the color paste injection port through the fifth radial channel and the first axial channel, and the second inlet and outlet channel is connected to the color paste injection port through the sixth radial channel, the second axial channel and the second radial outlet channel.

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

[0012] Further, the cross-sectional area of ​​the first radial injection channel is greater than the cross-sectional area of ​​the second radial injection channel.

[0013] Furthermore, the pump body structure also includes an elastic seal, which is arranged on a side of the first piston close to the sealing tube.

[0014] According to another aspect of the utility model, a color mixing machine is provided, comprising the above-mentioned color paste pump.

[0015] According to 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, a piston rod and a sealing tube. 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 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. The sealing tube is located at the bottom of the first pump body and is spaced apart from the second pump body. The sealing tube has a first inlet and outlet channel, and the first inlet and outlet channel is connected to the first pump body and the control valve. The first piston blocks the first inlet and outlet channel when the sealing tube abuts against the limit position. The control valve includes a valve body and a valve core, and the valve core is relative to the valve body. The valve body is rotatably arranged, and the valve core has a reflux channel, and the valve core has a color paste injection port, the color paste injection port is connected to the color paste barrel, and the valve core has a first radial outlet channel and a second radial outlet channel extending along the same straight line. When the valve core is rotated to a first preset position, the first inlet and outlet channel are connected to the color paste injection port through the reflux channel, the first radial outlet channel and the second radial outlet channel, so that the color paste in the first pump body can flow back to the color paste barrel. In this way, the first radial outlet channel and the second radial outlet channel are used to realize the series reflux of the first pump body, so that the reflux flow of the color paste from the first pump body to the color paste barrel is larger, thereby minimizing the color paste residue in the control valve, preventing the color paste from causing wear and leakage on the control valve, and solving the problem that the color paste pump in the prior art is easily worn by the color paste and leaks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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:

[0017] Figure 1 A schematic structural diagram showing an angle of a color paste pump in a specific embodiment of the utility model; and

[0018] Figure 2 A schematic structural diagram showing another angle of a color paste pump in a specific embodiment of the utility model;

[0019] Figure 3 A cross-sectional view of a color paste pump at the connection between a valve body and a pump body structure in a specific embodiment of the utility model is shown;

[0020] Figure 4 A schematic diagram showing a first piston abutting against a position limiting sealing tube in a specific embodiment of the utility model is shown;

[0021] Figure 5 A schematic diagram showing the structure of a valve core in a specific embodiment of the utility model is shown;

[0022] 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 first preset position;

[0023] 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 in a closed position;

[0024] Figure 8 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;

[0025] Fig. 9 A structural schematic diagram is shown when the valve core in a specific embodiment of the utility model is located at the third preset position.

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

[0027] 10. First pump body; 11. Third inlet and outlet channel; 20. Second pump body; 30. Piston rod; 31. First piston; 32. Second piston; 40. Sealing tube; 50. Valve body; 51. First return channel; 52. Second return channel; 53. Color paste injection outlet; 60. Valve core; 61. Color paste injection port; 601. First radial injection channel; 602. Second radial injection channel; 603. Arc groove channel; 604. First axial channel; 605. First radial channel; 606. First axial channel; 607. Second radial channel; 608. Second axial channel; 609. Third radial channel; 610. Fourth radial channel; 611. Second axial channel; 612. Fifth radial channel; 613. Sixth radial channel; 614. Seventh radial channel; 615. Eighth radial channel; 70. Elastic sealing element; 80. Valve stem. 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 5 As 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 make the pump body structure 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, a piston rod 30 and a sealing tube 40. 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 31 and a second piston 32 at intervals, the first piston 31 is used to seal the first pump body 10, and the second piston 32 is used to seal the second pump body 20. The sealing tube 40 is located at the bottom of the first pump body 10 and is spaced from the second pump body 20. The sealing tube 40 has a first inlet and outlet channel, the first inlet and outlet channel communicates with the first pump body 10 and the control valve, and the first piston 31 blocks the first inlet and outlet channel when the sealing tube 40 abuts against the limit position. 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, the valve core 60 has a color paste injection port 61, the color paste injection port 61 is connected to the color paste barrel, the valve core 60 has a first radial injection channel 601 and a second radial injection channel 602 extending along the same straight line, and the first inlet and outlet channel is connected to the color paste injection port 61 through the reflux channel, the first radial injection channel 601 and the second radial injection channel 602 when the valve core 60 rotates to the first preset position, so as to make the color paste in the first pump body 10 flow back to the color paste barrel. It can be understood that the first pump body 10 is a large pump body and the second pump body 20 is a small pump body. The angle between the first radial injection channel 601 and the second radial injection channel 602 is 180°.

[0034] Through the above-mentioned arrangement, the first radial injection channel 601 and the second radial injection channel 602 are utilized to realize the series reflux of the first pump body 10, so that the reflux flow rate of the color paste from the first pump body 10 to the color paste barrel is larger, thereby minimizing the residual color paste in the control valve and preventing the color paste from causing wear on the control valve and causing leakage.

[0035] like Figures 1 to 2 , Figure 5 As shown, in this embodiment, the control valve further includes a valve stem 80. The valve stem 80 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 80, so as to facilitate the operation of the valve stem 80 to rotate.

[0036] like Figure 4 As shown, in this embodiment, the pump body structure further includes an elastic seal 70, which is disposed on a side of the first piston 31 close to the sealing tube 40. When the first piston 31 moves downward by a preset distance, the elastic seal 70 abuts against the sealing tube 40 to block the first inlet and outlet channel, thereby increasing the anti-leakage performance of the color paste pump. Specifically, the elastic seal 70 may be an elastic rubber member.

[0037] like Figure 3 and Figure 6 As shown, in this embodiment, the reflux channel includes a first reflux channel 51 and a second reflux channel 52. The first reflux channel 51 and the second reflux channel 52 are respectively located on both sides of the valve body 50 and are located in the same plane. Specifically, the first reflux channel 51 and the second reflux channel 52 are respectively opened on the two side walls of the valve body 50 along the axial direction, and the two ends are connected to the inner side of the valve body 50 through two radial holes. Further, the color paste injection port 61 is located at one end of the valve core 60, and the valve body 50 also has a color paste injection outlet 53, and the color paste injection outlet 53 is located at the end of the valve body 50 away from the color paste injection port 61. Correspondingly, the first radial injection channel 601 and the second radial injection channel 602 are also located at the end of the valve core 60 away from the color paste injection port 61, that is, the end close to the color paste injection outlet 53. In order to adapt to the radial injection channel, the reflux channel is relatively far away from the color paste injection port 61. In addition, in order for the first reflux channel 51 to be properly connected to the first inlet and outlet channel and for the second reflux channel 52 to be able to extend to be connected to the color paste injection port 61 , the length of the first reflux channel 51 is smaller than that of the second reflux channel 52 .

[0038] like Figures 5 and 6As shown, the valve core 60 also has an arc groove channel 603. In this embodiment, the arc groove channel 603 is a quarter arc and is opened on the outer peripheral surface of the valve core 60. When the valve core 60 rotates to the first preset position, the arc groove channel 603 is connected with the first inlet and outlet channel and the first return channel 51 respectively, and the second return channel 52 is connected with the second radial injection channel 602.

[0039] like Figures 5 and 6 As shown, in this embodiment, the valve core 60 also has a first axial channel 604 and a first radial channel 605. It can be understood that the axial channel is a channel extending along the central axis of the valve core 60. When the valve core 60 rotates to the first preset position, the second return channel 52 is connected to the color paste injection port 61 through the first radial channel 605 and the first axial channel 604. That is to say, when the valve core 60 is located at the first preset position, the color paste in the first pump body 10 flows back to the color paste barrel through the first inlet and outlet channel, the arc groove channel 603, the first return channel 51, the first radial injection channel 601, the second radial injection channel 602, the second return channel 52, the first radial channel 605 and the first axial channel 604 in sequence.

[0040] like Figures 5 and 6 As shown, in this embodiment, the second pump body 20 has a second inlet and outlet channel, and the valve core 60 also has a first axial channel 606 and a second radial channel 607. Specifically, the axial channel is spaced from the axial channel, that is, the axial channel is located at the outer side of the valve core 60 relative to the central axis. When the valve core 60 rotates to the first preset position, the second inlet and outlet channel is connected to the color paste injection port 61 through the second radial channel 607 and the first axial channel 606, so as to make the color paste in the second pump body 20 flow back to the color paste barrel. It can be understood that the first preset position is the position where the first pump body 10 and the second pump body 20 flow back at the same time, and at this time the second piston 32 needs to extend into the second pump body 20.

[0041] like Figures 2 to 5 , Figure 7As shown, in this embodiment, the bottom of the first pump body 10 is provided with a third inlet and outlet channel 11. The valve core 60 also has a first axial channel 604, a second axial channel 608, a third radial channel 609 and a fourth radial channel 610. The second axial channel 608 and the third radial channel 609 are symmetrically arranged with respect to the first axial channel 604, respectively, with respect to the first axial channel 604, with respect to the first axial channel 606 and the second radial channel 607. The fourth radial channel 610 is connected in parallel with the first axial channel 604 and the second axial channel 608. In other words, the first axial channel 606, the second radial channel 607, the second axial channel 608, the third radial channel 609 and the fourth radial channel 610 are located in the same plane. When the valve core 60 rotates to the closed position, the second inlet and outlet channel is communicated with the color paste injection port 61 through the third radial channel 609, the second axial channel 608 and / or the first axial channel 604. The third inlet and outlet channel 11 is connected to the color paste injection port 61 through the fourth radial channel 610 , the second axial channel 608 and / or the first axial channel 604 .

[0042] Specifically, when the valve core 60 is in the closed position, the driving pin of the valve stem 80 is horizontal, and this is also the channel state for the color paste pump to draw the color paste from the color paste barrel into the pump body structure. At this time, the first piston 31 first descends so that the elastic sealing member 70 below it presses the upper end surface of the sealing tube 40, and then the first piston 31 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 31 drives the second piston 32 together with the piston rod head at the top of the piston rod 30 to be pressed down by the driving component until the first piston 31 contacts the sealing tube 40 before the stroke, so that the color paste flows back into the color paste barrel.

[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] like Figure 5 and Figure 8 As shown, in this embodiment, the valve core 60 also has a second axial channel 611, a fifth radial channel 612 and a sixth radial channel 613. When the valve core 60 rotates to the second preset position, the third inlet and outlet channel 11 is connected to the color paste injection port 61 through the fifth radial channel 612 and the first axial channel 604, and the second inlet and outlet channel is connected to the color paste injection port 53 through the sixth radial channel 613, the second axial channel 611 and the second radial outlet channel 602. Specifically, one end of the first radial outlet channel 601 and the second radial outlet channel 602 are respectively connected to one end of the second axial channel 611 away from the color paste injection port 61, that is, the first radial outlet channel 601 and the second radial outlet channel 602 are in a T-shaped structure with the second axial channel 611.

[0045] In this embodiment, the cross-sectional area of ​​the first radial injection channel 601 is greater than the cross-sectional area of ​​the second radial injection channel 602. That is, the first radial injection channel 601 is a large injection nozzle of the color paste pump, and the second radial injection channel 602 is a small injection nozzle of the color paste pump. The second preset position is the position where the small pump body of the color paste pump and the small injection nozzle inject the color paste.

[0046] like Fig. 9 As shown, in this embodiment, the valve body 50 further has a color paste injection outlet 53, and the valve core 60 further has a second axial channel 611, a seventh radial channel 614, and an eighth radial channel 615. When the valve core 60 rotates to the third preset position, the first inlet and outlet channel is connected to the color paste injection outlet 53 through the seventh radial channel 614, the second axial channel 611, and the first radial injection channel 601, and the second inlet and outlet channel is connected to the color paste injection outlet 53 through the eighth radial channel 615, the second axial channel 611, and the first radial injection channel 601. In other words, the third preset position is the position where the large pump body, the small pump body, and the large injection nozzle of the color paste pump inject the color paste.

[0047] In this embodiment, the first preset position, the second preset position, the third preset position and the closed position are positions where the valve core 60 rotates at equal angles, that is, the rotation angle of the valve core 60 between two adjacent positions is 90°. Correspondingly, the angle between the fourth radial channel 610 and the fifth radial channel 612 is 90°, and they are located in the same rotation plane as the third inlet and outlet channel 11. The angle between the first radial channel 605 and the fourth radial channel 610 is 90°. The angle between the sixth radial channel 613 and the eighth radial channel 615 is 180°, and they are respectively connected to one end of the second axial channel 611 close to the color paste injection port 61, that is, the sixth radial channel 613 and the eighth radial channel 615 are in a T-shaped structure with the second axial channel 611. The angle between the third radial channel 609 and the sixth radial channel 613 is 90°, and the second radial channel 607, the third radial channel 609, the sixth radial channel 613 and the eighth radial channel 615 are located in the same rotation plane as the second inlet and outlet channel. The seventh radial channel 614 is parallel to the eighth radial channel 615. By rotating the valve core 60, the colorant pump can be adjusted to different states, and switched between the colorant suction, small amount of injection, large amount of injection and reflux states. By rotating the valve core 60 and designing different channels in the valve core 60, it is convenient to switch different functional positions according to usage requirements.

[0048] It should be noted that in Figures 6 to 9 In the figure, the black channel is a channel through which the colorant can flow, and the colorless channel is a channel through which the colorant cannot flow.

[0049] 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.

[0050] From the above description, it can be seen that the above-mentioned embodiments of the utility model achieve the following technical effects: by setting the color paste pump 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, so that the pump body structure can 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, a piston rod 30 and a sealing tube 40, 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 spaced apart with a first piston 31 and a second piston 32, the first piston 31 is used to seal the first pump body 10, the second piston 32 is used to seal the second pump body 20, the sealing tube 40 is located at the bottom of the first pump body 10 and is spaced apart from the second pump body 20, the sealing tube 40 has a first inlet and outlet channel, the first inlet and outlet channel connects the first pump body 10 and the control valve, and the first piston 31 is blocked when it abuts against the sealing tube 40 to limit the position. The first inlet and outlet channel, 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, the valve core 60 has a color paste injection port 61, the color paste injection port 61 is connected to the color paste barrel, the valve core 60 has a first radial outlet channel 601 and a second radial outlet channel 602 extending along the same straight line, the first inlet and outlet channel is connected to the color paste injection port 61 through the reflux channel, the first radial outlet channel 601 and the second radial outlet channel 602 when the valve core 60 rotates to the first preset position, and is used to make the color paste in the first pump body 10 flow back to the color paste barrel, and the first radial outlet channel 601 and the second radial outlet channel 602 are used to realize the series reflux of the first pump body 10, so that the reflux flow of the color paste from the first pump body 10 to the color paste barrel is larger, thereby reducing the color paste residue in the control valve as much as possible, and preventing the color paste from causing wear on the control valve and leakage.

[0051] 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.

[0052] 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.

[0053] 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 (31) and a second piston (32) are arranged at a lower end of the piston rod (30), wherein the first piston (31) is used to seal the first pump body (10), and the second piston (32) is used to seal the second pump body (20); a sealing tube (40), the sealing tube (40) being located at the bottom of the first pump body (10) and spaced apart from the second pump body (20), the sealing tube (40) having a first inlet and outlet passage, the first inlet and outlet passage being connected to the first pump body (10) and the control valve, and the first piston (31) blocking the first inlet and outlet passage when abutting against the sealing tube (40) to limit the position; 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, the valve core (60) has a color paste injection port (61), and the color paste injection port (61) is communicated with the color paste barrel, the valve core (60) has a first radial injection channel (601) and a second radial injection channel (602) extending along the same straight line, and when the valve core (60) rotates to a first preset position, the first inlet and outlet channel is communicated with the color paste injection port (61) through the reflux channel, the first radial injection channel (601) and the second radial injection channel (602), so as to allow the color paste in the first pump body (10) to flow back to the color paste barrel.

2. The color paste pump according to claim 1, characterized in that: The reflux channel comprises a first reflux channel (51) and a second reflux channel (52), wherein the first reflux channel (51) and the second reflux channel (52) are respectively located on two sides of the valve body (50) and are located in the same plane, and the valve core (60) further comprises a circular arc groove channel (603), and when the valve core (60) rotates to the first preset position, the circular arc groove channel (603) is respectively connected to the first inlet and outlet channel and the first reflux channel (51), and the second reflux channel (52) is connected to the second radial injection channel (602).

3. The color paste pump according to claim 2, characterized in that: The valve core (60) also has a first axial channel (604) and a first radial channel (605). When the valve core (60) rotates to the first preset position, the second return channel (52) is connected to the color paste injection port (61) through the first radial channel (605) and the first axial channel (604).

4. The color paste pump according to claim 1, characterized in that: The second pump body (20) has a second inlet and outlet channel, and the valve core (60) also has a first axial channel (606) and a second radial channel (607). When the valve core (60) rotates to the first preset position, the second inlet and outlet channel is connected to the color paste injection port (61) through the second radial channel (607) and the first axial channel (606), so as to allow the color paste in the second pump body (20) to flow back to the color paste barrel.

5. The color paste pump according to claim 4, characterized in that: A third inlet and outlet channel (11) is provided at the bottom of the first pump body (10); the valve core (60) further comprises a first axial channel (604), a second axial channel (608), a third radial channel (609) and a fourth radial channel (610); the second axial channel (608) and the third radial channel (609) are symmetrically arranged with respect to the first axial channel (604) and the first axial channel (606) and the second radial channel (607), respectively; the fourth radial channel (610) is symmetrically arranged with respect to the first axial channel (604). The third inlet / outlet channel (604) and the second axial channel (608) are connected in parallel. When the valve core (60) rotates to the closed position, the second inlet / outlet channel is connected to the color paste injection port (61) through the third radial channel (609), the second axial channel (608) and / or the first axial channel (604). The third inlet / outlet channel (11) is connected to the color paste injection port (61) through the fourth radial channel (610), the second axial channel (608) and / or the first axial channel (604).

6. The color paste pump according to claim 5, characterized in that: The valve body (50) also has a color paste injection port (53), and the valve core (60) also has a second axial channel (611), a fifth radial channel (612) and a sixth radial channel (613). When the valve core (60) rotates to a second preset position, the third inlet and outlet channel (11) is connected to the color paste injection port (61) via the fifth radial channel (612) and the first axial channel (604), and the second inlet and outlet channel is connected to the color paste injection port (53) via the sixth radial channel (613), the second axial channel (611) and the second radial injection channel (602).

7. The color paste pump according to claim 1, characterized in that: The second pump body (20) has a second inlet and outlet channel, the valve body (50) also has a color paste injection outlet (53), and the valve core (60) also has a second axial channel (611), a seventh radial channel (614) and an eighth radial channel (615). When the valve core (60) rotates to a third preset position, the first inlet and outlet channel is connected to the color paste injection outlet (53) through the seventh radial channel (614), the second axial channel (611) and the first radial injection channel (601), and the second inlet and outlet channel is connected to the color paste injection outlet (53) through the eighth radial channel (615), the second axial channel (611) and the first radial injection channel (601).

8. The color paste pump according to any one of claims 1 to 7, characterized in that: The cross-sectional area of ​​the first radial injection channel (601) is greater than the cross-sectional area of ​​the second radial injection channel (602).

9. The color paste pump according to any one of claims 1 to 7, characterized in that: The pump body structure further comprises an elastic sealing member (70), wherein the elastic sealing member (70) is arranged on a side of the first piston (31) close to the sealing tube (40).

10. A color mixing machine, characterized in that: The invention comprises the color paste pump according to any one of claims 1 to 9.

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