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 valve body, the valve body is provided with a mounting cavity, a color paste inlet and a color paste outlet, the color paste inlet and the color paste outlet are communicated with the mounting cavity, and the valve body is also internally provided with a first backflow channel and a second backflow channel which axially extend; the large pump body and the small pump body are arranged on the valve body, and the small pump body is located in the large pump body; at least one part of the valve rod is rotatably arranged in the valve body, the valve rod is provided with a first flow channel, a second flow channel, a third flow channel, a fourth flow channel, a fifth flow channel, a small outpouring flow channel and a large outpouring flow channel which are independently arranged, and the valve rod is provided with a first position, a second position, a third position and a fourth position which are rotatably switched. According to the color paste pump and the color mixer, the problems that in the prior art, pump materials in a color paste pump are left in the pump for a long time, the pump body is abraded, and the pump body is damaged and leaks liquid are solved.

Description

Technical Field

[0001] The utility model relates to a coating color mixing technology, in particular to a color paste pump and a color mixing machine. Background Art

[0002] The color mixing pump valve body structure in the prior art is disclosed in the patents CN201310045508.9, CN201410792555.4, and CN201410792472.5. These existing color mixing pump valves can ensure the accuracy of 0.015ml small-metered color paste injection, and can also achieve large-metered color paste injection, and have an effective structure to prevent the color paste secondary outlet from being blocked. However, since the color paste contains powder solid matter, this powder solid matter has a certain wear effect on the valve body and valve stem, especially the iron red and iron yellow minerals in the color paste will have a certain wear on the valve body and valve stem made of organic resin materials when used without lubricating oil. The wear after long-term use leads to a decrease in the sealing of the pump valve, and some color pastes with low viscosity 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, which will cause certain inconvenience to the user.

[0003] As can be seen from the above, if the pump material in the existing color paste pump is retained in the pump for a long time, the pump body will be worn, resulting in damage to the pump body and leakage. Utility Model Content

[0004] The main purpose of the utility model is to provide a method to solve the problem in the prior art that the pump material in the color paste pump remains in the pump for a long time, which causes wear on the pump body and leads to damage and leakage of the pump body.

[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 valve body, the valve body has an installation cavity and a color paste inlet and an injection outlet connected with the installation cavity, and the valve body also has a first return flow channel and a second return flow channel extending axially; a large pump body and a small pump body, the large pump body and the small pump body are arranged on the valve body, and the small pump body is located inside the large pump body; at least a part of the valve stem is rotatably arranged inside the valve body, the valve stem has independently arranged first flow channel, second flow channel, third flow channel, fourth flow channel, fifth flow channel, small injection flow channel and large injection flow channel, and the valve stem has a first position, a second position, a third position and a fourth position of rotation switching; when the valve stem is in the first position, the first flow channel and the second flow channel are connected with the color paste inlet, the first flow channel is connected with the second flow channel through the fourth flow channel, and the large pump body and the small pump body are connected with the second flow channel; when the valve stem is in the second position, the large pump body and the small pump body are connected to the large injection flow channel through the third flow channel, and the large injection flow channel is connected to the injection outlet; when the valve stem is in the third position, and the small piston of the small pump body is located inside the cylinder of the small pump body, the color paste inlet is connected to the large pump body through the first flow channel, the small pump body is connected to the small injection flow channel through the third flow channel, and the small injection flow channel is connected to the injection outlet; when the valve stem is in the fourth position, the first flow channel and the second flow channel are connected to the color paste inlet, the first flow channel and the second flow channel are connected to each other through the fourth flow channel, the large pump body is connected to the color paste inlet through the first flow channel, the small pump body circulates with the third flow channel through the fifth flow channel, the small pump body is connected to the first return flow channel through the fifth flow channel, the two ends of the small injection flow channel are respectively connected to the third flow channel and the second return flow channel, the two ends of the large injection flow channel are respectively connected to the first return flow channel and the third flow channel, and the second return flow channel is connected to the first flow channel.

[0006] Furthermore, along the circumference of the valve body, the first return flow channel and the second return flow channel are arranged at an interval of 180°.

[0007] Furthermore, the valve body has a radially extending small pump body flow channel and a large pump body flow channel which are connected to the installation cavity, and the large pump body flow channel includes a first large pump body sub-flow channel and a second large pump body sub-flow channel; when the valve stem is in the first position, the third position and the fourth position, the first large pump body sub-flow channel is connected to the first flow channel; when the valve stem is in the second position, the second large pump body sub-flow channel is connected to the third flow channel.

[0008] Furthermore, the third flow channel has a first arm segment, a second arm segment, a third arm segment and a fourth arm segment which are connected to each other. The first arm segment extends along the axial direction of the valve body, the second arm segment, the third arm segment and the fourth arm segment extend along the radial direction of the valve body, the second arm segment and the third arm segment are collinear, the second arm segment and the fourth arm segment are parallel and extend in the same direction, the second arm segment and the third arm segment are arranged on the side of the first arm segment close to the color paste inlet, the second arm segment and the third arm segment are used to connect with the small pump body flow channel, and the fourth arm segment is used to connect with the second large pump body sub-flow channel.

[0009] Furthermore, the large outlet flow channel and the small outlet flow channel are collinear and connected along the radial direction of the valve body, the inner diameter of the small outlet flow channel is smaller than the inner diameter of the large outlet flow channel, and both the large outlet flow channel and the small outlet flow channel are connected to the third flow channel.

[0010] Furthermore, the first flow channel has a fifth arm segment, a sixth arm segment, a seventh arm segment and an eighth arm segment which are connected and arranged, the fifth arm segment extends along the axial direction of the valve body, the sixth arm segment, the seventh arm segment and the eighth arm segment extend along the radial direction of the valve body, the sixth arm segment is colinear with the fourth flow channel, the seventh arm segment is perpendicular to the fourth flow channel, the eighth arm segment is arranged at an end of the fifth arm segment away from the color paste inlet, the eighth arm segment is parallel to the seventh arm segment and is arranged at an interval of 180° along the circumference of the valve body; when the valve body is in the third position, the seventh arm segment is connected with the large pump body; when the valve body is in the fourth position, the sixth arm segment is connected with the large pump body, and the eighth arm segment is connected with the second return flow channel.

[0011] Furthermore, the valve body has a radially extending small pump body flow channel and a large pump body flow channel which are connected to the installation cavity. The fifth flow channel is a groove structure formed on the outer circumferential surface of the valve stem. The groove structure extends circumferentially along the valve stem. The outer circumferential surface of the valve stem is fitted with the inner circumferential surface of the valve body. The inner circumferential surface of the valve body blocks the notch of the groove structure to form a sealed flow channel structure. When the valve stem is in the fourth position, one end of the fifth flow channel is connected to the small pump body, and the other end of the fifth flow channel is connected to the first return flow channel and the third arm section of the third flow channel.

[0012] Furthermore, the second flow channel includes a ninth arm segment, a tenth arm segment and an eleventh arm segment which are connected to each other. The tenth arm segment and the fourth flow channel are colinear and connected. The tenth arm segment and the eleventh arm segment are parallel. The eleventh arm segment is located at the end of the ninth arm segment away from the color paste inlet, and the eleventh arm segment is connected to the small pump body.

[0013] Further, the first position is rotated 90 degrees clockwise to form the second position, the second position is rotated 90 degrees clockwise to form the fourth position, the fourth position is rotated 90 degrees clockwise to form the third position, and the fourth position is rotated 90 degrees clockwise to form the first position.

[0014] Furthermore, the color paste pump further comprises a driving pin, at least another part of the valve stem is exposed outside the valve body, and the driving pin is arranged on the part of the valve stem exposed outside the valve body.

[0015] According to another aspect of the present invention, a color mixing machine is provided, and the color mixing machine includes the above-mentioned color paste pump.

[0016] By applying the technical solution of the utility model, the following technical effects are achieved:

[0017] 1. Through the rotation of the valve body and the design of multiple channels in the valve body, when the valve stem rotates, it is convenient to flow liquid to different channels, thereby controlling the flow direction of the liquid and completing different liquid flow actions. In the first position, the first return channel and the second return channel are not connected to the color paste inlet, which improves the sealing between the valve body and the valve stem. When the valve stem needs to be refluxed, the valve stem rotates and switches to the reflux position. At this time, the color paste will reflux through the first return channel and the second return channel opened on the valve body to avoid the color paste retained inside the valve body from wearing the valve body and the valve stem, thereby achieving the effect of increasing the anti-leakage of the valve stem and the valve body through the reflux of the valve body.

[0018] 2. Through the rotation of the valve stem, the valve stem of the present application can be rotated and switched between four different positions. In order to facilitate the rotation of the valve stem, the valve stem of the present application rotates the same angle each time, that is, one-quarter of the arc 90 degrees. In this way, each time the position of the valve stem needs to be changed, the casing is rotated the same degree, reducing the difficulty of rotating the valve stem.

[0019] 3. The present application is provided with a driving pin. When the valve stem needs to be rotated, the valve stem can be easily driven to rotate by driving the driving pin. Since the driving pin is arranged on the outside of the valve body, it is convenient and quick to operate the driving pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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:

[0021] Figure 1 This is a schematic diagram of the overall structure of the color paste pump provided by the utility model;

[0022] Figure 2 A schematic diagram of the valve body of the color paste pump provided by the utility model;

[0023] Figure 3 A schematic diagram of the structure of the valve stem provided by the utility model;

[0024] Figure 4 A schematic diagram of a valve stem flow channel in a first position of the valve stem provided by the utility model;

[0025] Figure 5 A schematic diagram of a valve stem flow channel in the second position of the valve stem provided by the utility model;

[0026] Figure 6 A schematic diagram of a valve stem flow channel in the third position of the valve stem provided by the utility model;

[0027] Figure 7This is a schematic diagram of the valve stem flow channel when the valve stem is in the fourth position provided by the utility model.

[0028] The above drawings include the following reference numerals:

[0029] 1. Valve body; 11. First return flow channel; 12. Second return flow channel; 13. Color paste inlet; 14. Injection outlet; 2. Large pump body; 21. Large pump body flow channel; 211. First large pump body sub-flow channel; 212. Second large pump body sub-flow channel; 3. Small pump body; 31. Small pump body flow channel; 4. Valve stem; 41. First flow channel; 411. Fifth arm segment; 412. Sixth arm segment; 413. Seventh arm segment; 414. Eighth arm segment; 42. Second flow channel; 421. Ninth arm segment; 422. Tenth arm segment; 423. Eleventh arm segment; 43. Third flow channel; 431. First arm segment; 432. Second arm segment; 433. Third arm segment; 434. Fourth arm segment; 44. Fourth flow channel; 45. Fifth flow channel; 46. Small injection flow channel; 47. Large injection flow channel; 5. Driving pin. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Embodiment 1

[0034] In order to solve the problem in the prior art that the pump material in the color paste pump remains in the pump for a long time, which will cause wear on the pump body and lead to damage and leakage of the pump body, the present application provides a color paste pump, which adds a reflux channel on the valve body to recover the color paste retained in the valve body by reflux, which is beneficial to reduce the wear of the valve body and valve stem by the color paste, thereby ensuring the sealing of the valve body and reducing the occurrence of leakage.

[0035] A colorant pump, see Figures 1 to 7, valve body 1, large pump body 2, small pump body 3 and valve stem 4, the valve body 1 has an installation cavity and a color paste inlet 13 and an injection outlet 14 connected to the installation cavity, the valve body 1 also has an axially extending first return flow channel 11 and a second return flow channel 12, the large pump body 2 and the small pump body 3 are arranged on the valve body 1, the small pump body 3 is located inside the large pump body 2, at least a part of the valve stem 4 is rotatably arranged inside the valve body 1, the valve stem 4 has independently arranged first flow channel 41, second flow channel 42, third flow channel 43, fourth flow channel 44, fifth flow channel 45, small injection flow channel 46 and large injection flow channel 47, the valve stem 4 has a first position, a second position, a third position and a fourth position that can be switched by rotation,

[0036] When the valve stem 4 is in the first position, the first flow channel 41 and the second flow channel 42 are connected to the color paste inlet 13, the first flow channel 41 is connected to the second flow channel 42 through the fourth flow channel 44, and the large pump body 2 and the small pump body 3 are connected to the second flow channel 42.

[0037] When the valve stem 4 is in the second position, the large pump body 2 and the small pump body 3 are connected to the large injection flow channel 47 through the third flow channel 43, and the large injection flow channel 47 is connected to the injection port 14.

[0038] When the valve stem 4 is in the third position, and the small piston of the small pump body 3 is located inside the cylinder of the small pump body 3, the color paste inlet 13 is connected to the large pump body 2 through the first flow channel 41, the small pump body 3 is connected to the small injection flow channel 46 through the third flow channel 43, and the small injection flow channel 46 is connected to the injection outlet 14.

[0039] When the valve stem 4 is in the fourth position, the first flow channel 41 and the second flow channel 42 are connected to the color paste inlet 13, the first flow channel 41 and the second flow channel 42 are connected to each other through the fourth flow channel 44, the large pump body 2 is connected to the color paste inlet 13 through the first flow channel 41, the small pump body 3 circulates with the third flow channel 43 through the fifth flow channel 45, the small pump body 3 is connected to the first return flow channel 11 through the fifth flow channel 45, the two ends of the small injection channel 46 are connected to the third flow channel 43 and the second return flow channel 12 respectively, the two ends of the large injection channel 47 are connected to the first return flow channel 11 and the third flow channel 43 respectively, and the second return flow channel 12 is connected to the first flow channel 41.

[0040] When the valve stem 4 is in the first position, the piston in the large pump body 2 will be pulled upward to suck the color paste in the color paste barrel from the color paste inlet 13 into the first flow channel 41 and the second flow channel 42, and enter the large pump body 2 and the small pump body 3 through the second flow channel 42 to store the color paste. After a certain amount of color paste is sucked, the large piston of the large pump body 2 drives the small piston of the small pump body 3 to be pressed down by the piston head at the top of the piston rod through the driving component, and the color paste stored in the large pump body 2 and the small pump body 3 flows back to the color paste barrel. This state is the state of color paste suction.

[0041] It should be noted that the first return flow channel 11 and the second return flow channel 12 are not connected to the color paste inlet 13 to maintain a sealed structure, and the small injection flow channel 46 and the large injection flow channel 47 are not connected to the injection outlet 14 to maintain a sealed structure. The first return flow channel 11, the second return flow channel 12, the third flow channel 43, the large injection flow channel 47 and the small injection flow channel 46 are all in a sealed state, and there is no color paste inside the first return flow channel 11, the second return flow channel 12, the third flow channel 43, the small injection flow channel 46 and the large injection flow channel 47, so as to avoid the problem of the color paste wearing the valve body 1 and affecting the sealing of the valve body 1.

[0042] When the valve stem 4 is in the second position, the large piston of the large pump body 2 drives the small piston of the small pump body 3 to be pressed down by the piston head at the top of the piston rod through the driving component, and the color paste will flow out through the third flow channel 43 connected to the large pump body 2 and the small pump body 3. Since the large injection flow channel 47 is connected to the injection port 14 at this time, the color paste will flow out from the injection port 14 through the large injection flow channel 47 connected to the third flow channel 43. This state is a position state in which a large amount of injection is injected and the large injection nozzle discharges the color paste.

[0043] It should be noted that the first recirculation channel 11 and the second recirculation channel 12 are not connected to the color paste inlet 13 to maintain a sealed structure, and the first flow channel 41 is not in circulation with the large pump body 2 and the small pump body 3, and no backflow occurs, thereby avoiding affecting the stability of color paste injection.

[0044] When the valve stem 4 is in the third position, the large piston of the large pump body 2 and the small piston of the small pump body 3 are synchronously located at the position where the small piston and the cylinder of the small pump body 3 are aligned. The large piston of the large pump body 2 is pressed down by the driving component to realize that the color paste inside the large pump body 2 is connected to the color paste inlet 13 through the first flow channel 41 to realize reflux. When the small piston of the small pump body 3 is pressed down by the driving component, the color paste will flow out through the third flow channel 43 connected to the small pump body 3, because the small injection flow channel 46 is connected to the injection port 14 at this time. The color paste will flow out from the injection port 14 through the small injection flow channel 46 connected to the third flow channel 43, and this state is the position state of the small injection flow channel 46 to discharge the color paste. The liquid outflow of the small injection flow channel 46 is only controlled by the small pump body 3, which is conducive to improving the liquid outflow accuracy of the small injection flow channel 46.

[0045] When the valve stem 4 is in the fourth position, there are two circuits in the color paste pump. Under the downward pressure of the large piston of the large pump body 2 and the small piston of the small pump body 3: the color paste in one of the circuits flows back into the color paste inlet 13 through the first flow channel 41 and the second flow channel 42 connected to the large pump body 2; the color paste in the other circuit enters the first return flow channel 11 and the third flow channel 43 through the fifth flow channel 45 connected to the small pump body 3, the color paste in the first return flow channel 11 enters the third flow channel 43 through the large outlet flow channel 47 connected to the first return flow channel 11, and then flows back to the color paste inlet 13 through the small outlet flow channel 46, the second return flow channel 12 and the first flow channel 41 in sequence.

[0046] By rotating the valve body 1, the pump body can be changed into different states, and can be switched between the states of color paste suction, small amount of discharge, large amount of discharge and reflux. By rotating the valve body 1 and designing different flow channels in the valve body 1, it is convenient to change different positions. When the valve stem 4 needs to be refluxed, the valve body 1 switches to the reflux state. At this time, the color paste will reflux through the first reflux channel 11 and the second reflux channel 12 opened on the valve body 1 to avoid the color paste retained in the valve body 1 from wearing the valve body 1 and the valve stem 4. By refluxing the valve body 1 and the valve stem 4, the anti-leakage effect of the valve body 1 and the valve stem 4 is increased.

[0047] Furthermore, along the circumference of the valve body 1 , the first return flow channel 11 and the second return flow channel 12 are arranged at an interval of 180°.

[0048] From the overall structure, the first return flow channel 11 and the second return flow channel 12 are respectively located on both sides of the valve body 1, which makes it convenient to design different flow channels in the valve stem 4 and to cooperate with the valve stem 4 to switch different positions, especially the fourth position. When reflow is performed, the first reflow flow channel 11 and the second reflow flow channel 12 are designed to simultaneously perform reflow operations on both the large injection flow channel 47 and the small injection flow channel 46.

[0049] Furthermore, the valve body 1 has a radially extending small pump body flow channel 31 and a large pump body flow channel 21 which are connected to the installation cavity, and the large pump body flow channel 21 includes a first large pump body sub-flow channel 211 and a second large pump body sub-flow channel 212; when the valve stem 4 is in the first position, the third position and the fourth position, the first large pump body sub-flow channel 211 is connected to the first flow channel 41; when the valve stem 4 is in the second position, the second large pump body sub-flow channel 212 is connected to the third flow channel 43.

[0050] By adopting the above scheme, the large pump body flow channel 21 and the small pump body flow channel 31 better restrict the flow of color paste between the second flow channel 42 and the large pump body 2 and the small pump body 3, and the color paste flow channel between the third flow channel 43 and the large pump body 2, thereby facilitating the connection of the color paste between the large pump body 2, the small pump body 3, the second flow channel 42 and the third flow channel 43.

[0051] By setting two different large pump body flow channels 21, the valve stem 4 can be conveniently connected with different large pump body flow channels 21 when in different positions, which can reduce the number of flow channels in the valve stem 4 and facilitate the valve stem 4 to cooperate with different large pump body flow channels 21 when in different positions.

[0052] Furthermore, the third flow channel 43 has a first arm segment 431, a second arm segment 432, a third arm segment 433 and a fourth arm segment 434 which are connected to each other. The first arm segment 431 extends along the axial direction of the valve body 1, and the second arm segment 432, the third arm segment 433 and the fourth arm segment 434 extend along the radial direction of the valve body 1. The second arm segment 432 and the third arm segment 433 are collinear, and the second arm segment 432 and the fourth arm segment 434 are parallel and extend in the same direction. The second arm segment 432 and the third arm segment 433 are arranged on one side of the first arm segment 431 close to the color paste inlet 13, the second arm segment 432 and the third arm segment 433 are used to communicate with the small pump body flow channel 31, and the fourth arm segment 434 is used to communicate with the second large pump body sub-flow channel 212.

[0053] The third flow channel 43 is set to different arm segments, the first arm segment 431 is used as the main arm segment, and the second arm segment 432, the third arm segment 433 and the fourth arm segment 434 are used to cooperate with different flow channels. Through the protruding second arm segment 432, the third arm segment 433 and the fourth arm segment 434, when the valve stem 4 is in the second position, the second arm segment 432 is used to communicate with the small pump body 3, and the fourth arm segment 434 is used to circulate with the large pump body 2; when the valve stem 4 is in the third position, the third arm segment 433 is used to communicate with the small pump body 3; when the valve stem 4 is in the fourth position, the third arm segment 433 is connected to the small pump body 3 through the fifth flow channel 45. When in different positions, different arm segments cooperate with different flow channels, which can facilitate the flow of color paste between the valve stem 4 and the large pump body 2 and the small pump body 3, and increase the stability of the color paste flow.

[0054] In the present application, the large outlet channel 47 and the small outlet channel 46 are arranged in a radial direction of the valve body 1 in a collinear manner and are connected. The inner diameter of the small outlet channel 46 is smaller than the inner diameter of the large outlet channel 47 . Both the large outlet channel 47 and the small outlet channel 46 are connected to the third channel 43 .

[0055] The large outlet flow channel 47 and the small outlet flow channel 46 are both connected to the third flow channel 43. When the valve stem 4 rotates, the large outlet flow channel 47 is connected to the outlet 14, which is the large outlet state, at which a large amount of color paste can be injected; the small outlet flow channel 46 is connected to the outlet 14, which is the small outlet state, at which the color paste can be accurately injected. The large outlet flow channel 47 and the small outlet flow channel 46 are arranged to be radially colinear and connected, which facilitates the docking of the large outlet flow channel 47 or the small outlet flow channel 46 with the outlet 14. In this way, when the outlet 14 remains unchanged, it is only necessary to rotate the valve stem 4 to change the docking of the large outlet flow channel 47 or the small outlet flow channel 46 with the outlet 14 to complete the switching between the large outlet state and the small outlet state.

[0056] Furthermore, the first flow channel 41 has a fifth arm segment 411, a sixth arm segment 412, a seventh arm segment 413 and an eighth arm segment 414 which are connected and arranged, the fifth arm segment 411 extends along the axial direction of the valve body 1, the sixth arm segment 412, the seventh arm segment 413 and the eighth arm segment 414 extend along the radial direction of the valve body 1, the sixth arm segment 412 is colinear with the fourth flow channel 44, the seventh arm segment 413 is perpendicular to the fourth flow channel 44, the eighth arm segment 414 is arranged at an end of the fifth arm segment 411 away from the color paste inlet 13, the eighth arm segment 414 is parallel to the seventh arm segment 413 and is arranged at an interval of 180° along the circumference of the valve body 1; when the valve body 1 is in the third position, the seventh arm segment 413 is connected to the large pump body 2; when the valve body 1 is in the fourth position, the sixth arm segment 412 is connected to the large pump body 2, and the eighth arm segment 414 is connected to the second return flow channel 12.

[0057] The first flow channel 41 is set to different arm segments, the fifth arm segment 411 is used as the main arm segment, and the sixth arm segment 412, the seventh arm segment 413 and the eighth arm segment 414 are used to cooperate with different flow channels. Through the protruding sixth arm segment 412, the seventh arm segment 413 and the eighth arm segment 414, when the valve stem 4 is in the first position, the fifth arm segment 411 is connected to the color paste inlet 13; when the valve stem 4 is in the third position, the seventh arm segment 413 is connected to the large pump body 2; when the valve body 1 is in the fourth position, the sixth arm segment 412 is connected to the large pump body 2, and the eighth arm segment 414 is connected to the second return flow channel 12. In different positions, different arm segments are used to cooperate with different flow channels, which facilitates the flow of the color paste between the first flow channel 41 and the large pump body 2 or the second return flow channel 12, and increases the stability of the color paste flow.

[0058] In the present application, the valve body 1 has a radially extending small pump body flow channel 31 and a large pump body flow channel 21 which are connected to the installation cavity. The fifth flow channel 45 is a groove structure formed on the outer circumferential surface of the valve stem 4. The groove structure extends along the circumference of the valve stem 4. The outer circumferential surface of the valve stem 4 is fitted with the inner circumferential surface of the valve body 1. The inner circumferential surface of the valve body 1 blocks the notch of the groove structure to form a sealed flow channel structure. When the valve stem 4 is in the fourth position, one end of the fifth flow channel 45 is connected to the small pump body 3, and the other end of the fifth flow channel 45 is connected to the first return flow channel 11 and the third arm section 433 of the third flow channel 43.

[0059] By adopting the above-mentioned structural setting, the fifth flow channel 45 is in an arc shape and is located at the periphery of the valve stem 4, and is formed after the valve stem 4 and the valve body 1 cooperate. Since the fifth flow channel 45 is located at the periphery of the valve stem 4, it is convenient to process the valve stem 4 during the production and molding process of the valve stem 4. Since the fifth flow channel 45 is in an arc shape and is located at the periphery of the valve stem 4, relative to the other flow channels inside the valve stem 4, the fifth flow channel 45 can avoid interference with the other flow channels, thereby increasing the stability of the color paste flowing in the valve stem 4.

[0060] Furthermore, the second flow channel 42 includes a ninth arm segment 421, a tenth arm segment 422 and an eleventh arm segment 423 which are connected to each other. The tenth arm segment 422 and the fourth flow channel 44 are colinear and connected. The tenth arm segment 422 and the eleventh arm segment 423 are parallel. The eleventh arm segment 423 is located at the end of the ninth arm segment 421 away from the color paste inlet 13, and the eleventh arm segment 423 is connected to the small pump body 3.

[0061] The second flow channel 42 is arranged into different arm segments, the ninth arm segment 421 is the main arm segment, and the tenth arm segment 422 and the eleventh arm segment 423 are used to cooperate with other different flow channels. By protruding the first arm segment and the eleventh arm segment 423, when the valve stem 4 is in the first position, the tenth arm segment 422 is connected to the large pump body 2, and the eleventh arm segment 423 is connected to the small pump body 3. Through the cooperation of different arm segments with different flow channels, the second flow channel 42 cooperates with the large pump body 2 and the small pump body 3, thereby increasing the stability of the flow of the color paste.

[0062] In the present application, the first position is rotated 90 degrees clockwise to form the second position, the second position is rotated 90 degrees clockwise to form the fourth position, the fourth position is rotated 90 degrees clockwise to form the third position, and the fourth position is rotated 90 degrees clockwise to form the first position.

[0063] By rotating the valve stem 4, the valve stem 4 can be switched between four different positions. In order to facilitate the rotation of the valve stem 4, the valve stem 4 can be rotated by the same angle each time, that is, one-quarter of an arc of 90 degrees. In this way, each time the position of the valve stem 4 needs to be changed, it only needs to be rotated by the same degree, thereby reducing the difficulty of rotating the valve stem 4.

[0064] Furthermore, the color paste pump further includes a driving pin 5 , at least another part of the valve stem 4 is exposed outside the valve body 1 , and the driving pin 5 is arranged on the part of the valve stem 4 exposed outside the valve body 1 .

[0065] When the valve stem 4 needs to be rotated, the valve stem 4 can be easily driven to rotate by driving the driving pin 5. Since the driving pin 5 is arranged outside the valve body 1, it is convenient and quick to operate the driving pin 5.

[0066] In the published patents CN201310045508.9, CN201410792555.4, and CN201410792472.5, when the valve stem 4 is in the first position, the return flow channel (the first return flow channel 11 and / or the second return flow channel 12) is connected to the same color paste inlet 13, while in the structure of the present patent, when the valve stem 4 is in the first position, the return flow channel is not connected to the same color paste inlet 13, thereby improving the sealing between the valve body and the valve stem, and making the leakage resistance of the valve body doubled compared with the above-mentioned existing patents.

[0067] Embodiment 2

[0068] This embodiment provides a color mixing machine, including the color paste pump in the first embodiment.

[0069] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0070] 1. Through the rotation of the valve body 1 and the design of different flow channels in the valve body 1, when the valve stem 4 rotates, it is convenient to flow liquid to different flow channels, thereby controlling the flow direction of the liquid and completing different liquid flow actions. In the first position, the first return flow channel 11 and the second return flow channel 12 are not connected to the color paste inlet 13, which improves the sealing between the valve body 1 and the valve stem 4. When the valve stem 4 needs to be refluxed, the valve stem 4 rotates and switches to the reflux position. At this time, the color paste will reflux through the first reflux flow channel 11 and the second reflux flow channel 12 opened on the valve body 1. Reflux through the valve body 1 can increase the anti-leakage effect of the valve stem 4 and the valve body 1.

[0071] 2. By rotating the valve stem 4, the valve stem 4 switches between four different positions. In order to facilitate the rotation of the valve stem 4, the valve stem 4 can be rotated by the same angle each time, that is, one-quarter of the arc 90 degrees. In this way, each time the position of the valve stem 4 needs to be changed, the casing is rotated by the same degree, reducing the difficulty of rotating the valve stem 4.

[0072] 3. When the valve stem 4 needs to be rotated, the valve stem 4 can be easily driven to rotate by driving the driving pin 5. Since the driving pin 5 is arranged outside the valve body 1, it is convenient and quick to operate the driving pin 5.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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: include: A valve body (1), the valve body (1) having a mounting cavity and a color paste inlet (13) and an outlet (14) communicated with the mounting cavity, and the valve body (1) also having a first return flow channel (11) and a second return flow channel (12) extending axially; A large pump body (2) and a small pump body (3), wherein the large pump body (2) and the small pump body (3) are arranged on the valve body (1), and the small pump body (3) is located inside the large pump body (2); A valve stem (4), at least a portion of which is rotatably arranged inside the valve body (1), the valve stem (4) having independently arranged first flow channel (41), second flow channel (42), third flow channel (43), fourth flow channel (44), fifth flow channel (45), small injection flow channel (46) and large injection flow channel (47), the valve stem (4) having a first position, a second position, a third position and a fourth position which can be switched by rotation; When the valve stem (4) is in the first position, the first flow channel (41) and the second flow channel (42) are in communication with the color paste inlet (13), the first flow channel (41) is in communication with the second flow channel (42) via the fourth flow channel (44), and the large pump body (2) and the small pump body (3) are in communication with the second flow channel (42); When the valve stem (4) is in the second position, the large pump body (2) and the small pump body (3) are connected to the large outlet flow channel (47) through the third flow channel (43), and the large outlet flow channel (47) is connected to the outlet (14); When the valve stem (4) is in the third position, when the small piston of the small pump body (3) is located inside the cylinder of the small pump body (3), the color paste inlet (13) is connected to the large pump body (2) through the first flow channel (41), the small pump body (3) is connected to the small injection flow channel (46) through the third flow channel (43), and the small injection flow channel (46) is connected to the injection outlet (14); When the valve stem (4) is in the fourth position, the first flow channel (41) and the second flow channel (42) are connected to the color paste inlet (13), the first flow channel (41) and the second flow channel (42) are connected to each other through the fourth flow channel (44), the large pump body (2) is connected to the color paste inlet (13) through the first flow channel (41), the small pump body (3) is circulated with the third flow channel (43) through the fifth flow channel (45), the small pump body (3) is connected to the first return flow channel (11) through the fifth flow channel (45), the two ends of the small injection flow channel (46) are respectively connected to the third flow channel (43) and the second return flow channel (12), the two ends of the large injection flow channel (47) are respectively connected to the first return flow channel (11) and the third flow channel (43), and the second return flow channel (12) is connected to the first flow channel (41).

2. The color paste pump according to claim 1, characterized in that: Along the circumference of the valve body (1), the first return flow channel (11) and the second return flow channel (12) are arranged at an interval of 180°.

3. The color paste pump according to claim 1, characterized in that: The valve body (1) has a radially extending small pump body flow channel (31) and a large pump body flow channel (21) which are connected to the installation cavity, and the large pump body flow channel (21) includes a first large pump body sub-flow channel (211) and a second large pump body sub-flow channel (212); when the valve stem (4) is in a first position, a third position and a fourth position, the first large pump body sub-flow channel (211) is connected to the first flow channel (41); when the valve stem (4) is in a second position, the second large pump body sub-flow channel (212) is connected to the third flow channel (43).

4. The color paste pump according to claim 3, characterized in that: The third flow channel (43) comprises a first arm segment (431), a second arm segment (432), a third arm segment (433) and a fourth arm segment (434) which are arranged in communication with each other. The first arm segment (431) extends along the axial direction of the valve body (1). The second arm segment (432), the third arm segment (433) and the fourth arm segment (434) extend along the radial direction of the valve body (1). The second arm segment (432) and the third arm segment (433) are collinear. The second arm segment (432) and the fourth arm segment (434) are parallel and extend in the same direction. The second arm segment (432) and the third arm segment (433) are arranged on a side of the first arm segment (431) close to the color paste inlet (13). The second arm segment (432) and the third arm segment (433) are used to communicate with the small pump body flow channel (31). The fourth arm segment (434) is used to communicate with the second large pump body sub-flow channel (212).

5. The color paste pump according to claim 1, characterized in that: The large outlet channel (47) and the small outlet channel (46) are arranged in a colinear manner and in communication along the radial direction of the valve body (1); the inner diameter of the small outlet channel (46) is smaller than the inner diameter of the large outlet channel (47); and both the large outlet channel (47) and the small outlet channel (46) are in communication with the third channel (43).

6. The color paste pump according to claim 1, characterized in that: The first flow channel (41) comprises a fifth arm segment (411), a sixth arm segment (412), a seventh arm segment (413) and an eighth arm segment (414) which are connected to each other, the fifth arm segment (411) extending along the axial direction of the valve body (1), the sixth arm segment (412), the seventh arm segment (413) and the eighth arm segment (414) extending along the radial direction of the valve body (1), the sixth arm segment (412) and the fourth flow channel (44) being colinear, the seventh arm segment (413) being perpendicular to the fourth flow channel (44), and the eighth arm segment (414) being perpendicular to the fourth flow channel (44). 14) is arranged at one end of the fifth arm segment (411) away from the color paste inlet (13), the eighth arm segment (414) is parallel to the seventh arm segment (413) and is arranged at a 180° interval along the circumference of the valve body (1); when the valve body (1) is in the third position, the seventh arm segment (413) is connected to the large pump body (2); when the valve body (1) is in the fourth position, the sixth arm segment (412) is connected to the large pump body (2), and the eighth arm segment (414) is connected to the second return flow channel (12).

7. The color paste pump according to claim 1, characterized in that: The valve body (1) has a radially extending small pump body flow channel (31) and a large pump body flow channel (21) which are connected to the installation cavity. The fifth flow channel (45) is a groove structure formed on the outer peripheral surface of the valve stem (4). The groove structure extends along the circumference of the valve stem (4). The outer peripheral surface of the valve stem (4) is in contact with the inner peripheral surface of the valve body (1). The inner peripheral surface of the valve body (1) blocks the notch of the groove structure to form a sealed flow channel structure. When the valve stem (4) is in the fourth position, one end of the fifth flow channel (45) is connected to the small pump body (3), and the other end of the fifth flow channel (45) is connected to the first return flow channel (11) and the third arm section (433) of the third flow channel (43).

8. The color paste pump according to claim 1, characterized in that: The second flow channel (42) comprises a ninth arm segment (421), a tenth arm segment (422) and an eleventh arm segment (423) which are connected to each other; the tenth arm segment (422) and the fourth flow channel (44) are colinear and connected; the tenth arm segment (422) and the eleventh arm segment (423) are parallel; the eleventh arm segment (423) is located at an end of the ninth arm segment (421) away from the color paste inlet (13); and the eleventh arm segment (423) is connected to the small pump body (3).

9. The color paste pump according to claim 1, characterized in that: The first position is rotated 90 degrees clockwise to form the second position, the second position is rotated 90 degrees clockwise to form the fourth position, the fourth position is rotated 90 degrees clockwise to form the third position, and the fourth position is rotated 90 degrees clockwise to form the first position.

10. The color paste pump according to claim 1, characterized in that: The color paste pump further comprises a driving pin (5), at least another part of the valve stem (4) is exposed outside the valve body (1), and the driving pin (5) is arranged on the part of the valve stem (4) exposed outside the valve body (1).

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

Images