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 an injection port, the color paste inlet and the injection port are communicated with the mounting cavity, and the valve body is also internally provided with a backflow channel extending axially; 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 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 can be 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 color paste pump and a color mixing machine 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 causes damage to the pump body and leakage.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a color paste pump is provided, comprising: a valve body, the valve body having an installation cavity and a color paste inlet and an injection outlet connected to the installation cavity, and the valve body also having an axially extending return flow channel; 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; a valve stem, 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, small injection flow channel and large injection flow channel, 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 color paste inlet passes through The first flow channel is connected with the large pump body and the small pump body; when the valve stem is in the second position, the large pump body and the small pump body are connected with the large injection flow channel through the fourth flow channel, and the large injection flow channel is connected with the injection outlet; when the valve stem is in the third position, the color paste inlet is connected with the third flow channel through the first flow channel, the third flow channel is connected with the large pump body, the small pump body is connected with the small injection flow channel through the fourth flow channel, and the small injection flow channel is connected with the injection outlet; when the valve stem is in the fourth position, the first flow channel and the second flow channel are connected with the color paste inlet, the reflux flow channel is connected with the second flow channel and the small injection flow channel, the small injection flow channel is connected with the small pump body through the fourth flow channel, and the large pump body is connected with the first flow channel through the third flow channel for liquid reflux.

[0006] 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 first flow channel has a first arm segment, a second arm segment and a third arm segment which are connected and arranged. The first arm segment extends axially along the valve body, the second arm segment and the third arm segment extend radially along the valve body and are arranged in parallel, the third arm segment is arranged on the side of the second arm segment away from the color paste inlet, the second arm segment is used to communicate with the small pump body flow channel, and the third arm segment is used to communicate with the large pump body flow channel.

[0007] Furthermore, the large injection flow channel and the small injection flow channel are collinear and connected along the radial direction of the valve body, and the inner diameter of the small injection flow channel is smaller than the inner diameter of the large injection flow channel.

[0008] Furthermore, the second flow channel has a fourth arm segment and a fifth arm segment that are connected to each other. The fourth arm segment extends along the axial direction of the valve body, and the fifth arm segment extends along the radial direction of the valve body. The fifth arm segment is parallel to the large injection channel and the small injection channel. One end of the fourth arm segment away from the fifth arm segment is connected to the color paste inlet. When the valve stem is in the fourth position, the fifth arm segment is connected to the return flow channel.

[0009] 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 third flow channel is a groove structure formed on the outer circumferential surface of the valve stem. The groove structure extends along the circumference of 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 third position and the fourth position, the third flow channel is connected with the large pump body flow channel and the third arm section of the first flow channel.

[0010] Further, the fourth flow channel includes a sixth arm segment, a seventh arm segment, an eighth arm segment, a ninth arm segment and a tenth arm segment which are connected to each other. The sixth arm segment extends along the axial direction of the valve body, and the seventh arm segment, the eighth arm segment, the ninth arm segment and the tenth arm segment extend along the radial direction of the valve body. One end of the sixth arm segment is used to connect with the large injection channel and the small injection channel, and the other end of the sixth arm segment is provided with the seventh arm segment, the eighth arm segment and the ninth arm segment. The seventh arm segment, the eighth arm segment and the ninth arm segment are arranged at 90° intervals along the circumference of the valve body. The seventh arm segment, the eighth arm segment and the ninth arm segment are used to connect with the small pump body, and the tenth arm segment is used to connect with the large pump body. The seventh arm segment and the eighth arm segment are arranged linearly and parallel to the large injection channel and the small injection channel.

[0011] Furthermore, the valve body also has a through hole connected to both ends of the return flow channel, the through hole extends radially along the valve body, the extension directions of the two through holes are parallel, one of the through holes is used to connect with the second flow channel, and the other through hole is used to connect with the large injection channel or the small injection channel.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] By applying the technical solution of the utility model, the following technical effects are achieved:

[0016] 1. Through the rotation of the valve body and the design of multiple flow channels in the valve body, when the valve stem 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 reflux flow channel is not connected to the color paste inlet, which increases 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 reflux flow 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 valve body through the reflux of the valve body.

[0017] 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.

[0018] 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

[0019] 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:

[0020] Figure 1 This is a schematic diagram of the overall structure of the color paste pump provided by the utility model;

[0021] Figure 2 A schematic diagram of the valve body of the color paste pump provided by the utility model;

[0022] Figure 3 A schematic diagram of the structure of the valve stem provided by the utility model;

[0023] Figure 4 A schematic diagram of a valve stem flow channel in a first position of the valve stem provided by the utility model;

[0024] Figure 5 A schematic diagram of a valve stem flow channel in the second position of the valve stem provided by the utility model;

[0025] Figure 6 A schematic diagram of a valve stem flow channel in the third position of the valve stem provided by the utility model;

[0026] Figure 7 This is a schematic diagram of the valve stem flow channel when the valve stem is in the fourth position provided by the utility model.

[0027] The above drawings include the following reference numerals:

[0028] 1. Valve body; 11. Return flow channel; 12. Color paste inlet; 13. Injection outlet; 14. Through hole; 2. Large pump body; 21. Large pump body flow channel; 3. Small pump body; 31. Small pump body flow channel; 4. Valve stem; 41. First flow channel; 411. First arm section; 412. Second arm section; 413. Third arm section; 42. Second flow channel; 421. Fourth arm section; 422. Fifth arm section; 43. Third flow channel; 44. Fourth flow channel; 441. Sixth arm section; 442. Seventh arm section; 443. Eighth arm section; 444. Ninth arm section; 445. Tenth arm section; 45. Small injection flow channel; 46. Large injection flow channel; 5. Driving pin. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Embodiment 1

[0033] 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.

[0034] A colorant pump, see Figures 1 to 7, comprising a valve body 1, a large pump body 2, a small pump body 3 and a valve stem 4, the valve body 1 having an installation cavity and a color paste inlet 12 and an injection outlet 13 connected to the installation cavity, the valve body 1 also having a reflux flow channel 11 extending along the axis, 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 stem 4, the valve stem 4 has independently arranged first flow channels 41, second flow channels 42, third flow channels 43, fourth flow channels 44, small injection flow channels 45 and large injection flow channels 46, the valve stem 4 has a first position, a second position, a third position and a fourth position that can be rotatably switched; when the valve stem 4 is in the first position, the color paste inlet 12 is connected to the large pump body 2 and the small pump body 3 through the first flow channel 41; when the valve stem 4 is in the first position, the color paste inlet 12 is connected to the large pump body 2 and the small pump body 3 through the first flow channel 41; When in the second position, the large pump body 2 and the small pump body 3 are connected to the large injection channel 46 through the fourth flow channel 44, and the large injection channel 46 is connected to the injection port 13; when the valve stem 4 is in the third position, the color paste inlet 12 is connected to the third flow channel 43 through the first flow channel 41, the third flow channel 43 is connected to the large pump body 2, the small pump body 3 is connected to the small injection channel 45 through the fourth flow channel 44, and the small injection channel 45 is connected to the injection port 13; 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 12, the reflux flow channel 11 is connected to the second flow channel 42 and the small injection channel 45, the small injection channel 45 is connected to the small pump body 3 through the fourth flow channel 44, and the large pump body 2 is connected to the first flow channel 41 through the third flow channel 43 for liquid reflux.

[0035] When the valve stem 4 is in the first position, the large 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 12 into the first flow channel 41, and enter the large pump body 2 and the small pump body 3 through the first flow channel 41 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 can be returned to the color paste barrel. This state is the state of color paste suction. It should be noted that the reflux flow channel 11 is not connected to the color paste inlet 12 to maintain a sealed structure, and the small injection flow channel 45 and the large injection flow channel 46 are not connected to the injection outlet 13 to maintain a seal. The return flow channel 11, the third flow channel 43, the small injection flow channel 45 and the large injection flow channel 46 are all in a sealed state. There is no color paste inside the return flow channel 11, the third flow channel 43, the small injection flow channel 45 and the large injection flow channel 46, which avoids the problem of color paste wearing the valve body and affecting the sealing of the valve body.

[0036] 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 together and is 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 fourth flow channel 44 connected to the large pump body 2 and the small pump body 3. Since the large injection flow channel 46 is connected to the injection outlet 13 at this time, the color paste will flow out from the injection outlet 13 through the large injection flow channel 46 connected to the fourth flow channel 44. This state is a position state where a large amount of injection and a large injection nozzle inject the color paste pump. It should be noted that the reflux flow channel 11 is not connected to the color paste inlet 12 to maintain a sealed structure, and the first flow channel 41 is not connected to the large pump body 2 and the small pump body 3, so no reflux will occur, avoiding affecting the stability of the color paste injection.

[0037] 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 rod 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 passes through the third flow channel 43 and the first flow channel 41 and is connected to the color paste inlet 12 to realize reflux. The small piston of the small pump body 3 is pressed down by the driving component to make the color paste flow out through the fourth flow channel 44 connected to the small pump body 3. Since the small injection flow channel 45 is connected to the injection port 13 at this time, the color paste will flow out from the injection port 13 through the small injection flow channel 45 connected to the fourth flow channel 44. This state is the color paste position state of the small injection flow channel 45. The liquid outflow of the small injection flow channel 45 is only controlled by the small pump body 3, which is conducive to improving the liquid outflow accuracy of the small injection flow channel 45.

[0038] 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 circuit flows from the small pump body 3 through the fourth flow channel 44, the small injection flow channel 45, the return flow channel 11, the first flow channel 41, and then flows back through the color paste inlet 12; the color paste in the other circuit flows through the large pump body 2 into the third flow channel 43 and the second flow channel 42, and then flows back to the color paste inlet 12. When the valve stem 4 is in this position, the small piston of the small pump body 3 is located inside the small pump body 3, and this state is the state of the small injection flow channel 45 flowing back.

[0039] By rotating the valve body 1, the pump body can be changed into different states, and switch between the states of color paste suction, small amount of injection, large amount of injection 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 stem 4 switches to the reflux state. At this time, the color paste will reflux through the reflux channel 11 opened on the valve body 1 to avoid the color paste retained inside the valve body from wearing the valve body and the valve stem, thereby achieving the anti-leakage effect of the valve stem 4 and the valve body 1 by reflux through the valve body 1. Since the large injection nozzle that is not easy to dry out does not need to adopt reflux measures, only the small injection channel 45 is refluxed, which can significantly improve the anti-leakage effect.

[0040] 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. The first flow channel 41 has a first arm segment 411, a second arm segment 412 and a third arm segment 413 which are connected. The first arm segment 411 extends axially along the valve body 1, the second arm segment 412 and the third arm segment 413 extend radially along the valve body 1 and are arranged in parallel, the third arm segment 413 is arranged on the side of the second arm segment 412 away from the color paste inlet 12, the second arm segment 412 is used to communicate with the small pump body flow channel 31, and the third arm segment 413 is used to communicate with the large pump body flow channel 21.

[0041] By adopting the above scheme, the small pump body flow channel 31 and the large pump body flow channel 21 better restrict the circulation of the color paste between the first flow channel 41 and the large pump body 2 and the small pump body 3, and facilitate the communication of the color paste between the large pump body 2, the small pump body 3 and the first flow channel 41. The first flow channel 41 is set to three different arm segments, the second arm segment 412 is used to communicate with the small pump body flow channel 31, and the third arm segment 413 is used to communicate with the large pump body flow channel 21. Through the protruding second arm segment 412 and the third arm segment 413, when the valve body 1 rotates to the first position, the second arm segment 412 can better communicate with the small pump body flow channel 31, and the third arm segment 413 can better communicate with the third arm segment 413, which is convenient for the color paste to flow better between the valve stem 4 and the large pump body 2 and the small pump body 3, and increases the stability of the color paste flow.

[0042] In the present application, the large injection channel 46 and the small injection channel 45 are collinear and connected along the radial direction of the valve body 1 , and the inner diameter of the small injection channel 45 is smaller than the inner diameter of the large injection channel 46 .

[0043] The large outlet flow channel 46 and the small outlet flow channel 45 are both connected to the fourth flow channel 44. When the valve stem 4 rotates, the large outlet flow channel 46 is connected to the outlet 13 to enter the large outlet state, and the small outlet flow channel 45 is connected to the outlet 13 to enter the small outlet state. The large outlet flow channel 46 and the small outlet flow channel are radially colinear and connected, which facilitates the docking of the large outlet flow channel 46 or the small outlet flow channel 45 with the outlet 13. In this way, when the outlet 13 remains in position unchanged, it is only necessary to change the docking of the large outlet flow channel 46 or the small outlet flow channel 45 with the outlet 13 to complete the switching between the large outlet state and the small outlet state.

[0044] Furthermore, the second flow channel 42 has a fourth arm segment 421 and a fifth arm segment 422 which are connected to each other. The fourth arm segment 421 extends axially along the valve body 1, and the fifth arm segment 422 extends radially along the valve body 1. The fifth arm segment 422 is parallel to the large injection channel 46 and the small injection channel 45. The end of the fourth arm segment 421 away from the fifth arm segment 422 is connected to the color paste inlet 12. When the valve stem 4 is in the fourth position, the fifth arm segment 422 is connected to the return flow channel 11.

[0045] The fourth arm section 421 is connected to the color paste inlet 12, and the fifth arm section 422 is vertically arranged on the side of the fourth arm section 421 away from the color paste inlet 12. When it is rotated to the fourth position, the fifth arm section 422 will be connected to the return flow channel 11, and the small injection flow channel 45 is also connected to the return flow channel 11, and it is in the return state. Since the small injection flow channel 45 and the fifth arm section 422 are both located on the valve stem 4, and the two are arranged in parallel, as the valve stem 4 rotates, the fifth arm section 422 and the small injection flow channel 45 will be connected to the valve stem 4 together or not flow. When it is rotated to the return state, it can ensure that the small injection flow channel 45 and the fifth arm section 422 are both connected to the return flow channel 11, ensuring the stability of the color paste flow in the return state.

[0046] In this embodiment, 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 third flow channel 43 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 third position and the fourth position, the third flow channel 43 is connected with the large pump body flow channel 21 and the third arm section 413 of the first flow channel 41.

[0047] By adopting the above-mentioned structural setting, the third flow channel 43 is in an arc shape and is located at the periphery of the valve stem 4, and can only be formed when the valve stem 4 is matched with the valve body 1. Since the third flow channel 43 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. At the same time, since the third flow channel 43 is in an arc shape, it is convenient for the valve stem 4 to cooperate with multiple different flow channels, and it is convenient for the flow channels to be adaptively adjusted to be connected or disconnected when the valve stem 4 switches between different positions.

[0048] Furthermore, the fourth flow channel 44 includes a sixth arm segment 441, a seventh arm segment 442, an eighth arm segment 443, a ninth arm segment 444 and a tenth arm segment 445 which are connected to each other. The sixth arm segment 441 extends along the axial direction of the valve body 1, and the seventh arm segment 442, the eighth arm segment 443, the ninth arm segment 444 and the tenth arm segment 445 extend along the radial direction of the valve body 1. One end of the sixth arm segment 441 is used to communicate with the large injection flow channel 46 and the small injection flow channel 45, and the other end of the sixth arm segment 441 is used to communicate with the large injection flow channel 46 and the small injection flow channel 45. A seventh arm segment 442, an eighth arm segment 443 and a ninth arm segment 444 are provided at one end, and the seventh arm segment 442, the eighth arm segment 443 and the ninth arm segment 444 are arranged at 90° intervals along the circumference of the valve body 1. The seventh arm segment 442, the eighth arm segment 443 and the ninth arm segment 444 are used to communicate with the small pump body 3, and the tenth arm segment 445 is used to communicate with the large pump body 2. The seventh arm segment 442 and the eighth arm segment 443 are arranged linearly and are parallel to the large injection channel 46 and the small injection channel 45.

[0049] Among them, the sixth arm segment 441 extending axially along the valve body 1 serves as the main arm segment. When the valve stem 4 is in the second position, the third position and the fourth position, the fourth flow channel 44 needs to be connected with the small pump body 3. Therefore, it is necessary to set a plurality of arm segments with different positions at one end of the sixth arm segment 441, namely the seventh arm segment 442, the eighth arm segment 443 and the ninth arm segment 444. By setting different arm segments, the coordination between the fourth flow channel 44 and the small pump body 3 can be maintained when the valve stem 4 rotates to different positions, thereby maintaining the stability of the liquid flow when the valve body 1 switches between positions.

[0050] In this embodiment, the valve body 1 also has a through hole 14 connected to both ends of the return flow channel 11. The through hole 14 extends radially along the valve body 1. The extension directions of the two through holes 14 are parallel. One of the through holes 14 is used to connect with the second flow channel 42, and the other through hole 14 is used to connect with the large injection channel 46 or the small injection channel 45.

[0051] The through hole 14 provided on the valve body 1 and connected to the return flow channel 11 can facilitate the connection between the return flow channel 11 and the second flow channel 42, the small injection flow channel 45 or the large injection flow channel 46. When the valve body 1 is in the fourth position, the two through holes 14 can make the return flow channel 11 better connected with the second flow channel 42 and the small injection flow channel 45, increase the stability of the color paste flow, and reduce the possibility of the color paste flowing out from the gap between the return flow channel 11 and the second flow channel 42 or the small injection flow channel 45.

[0052] In this embodiment, 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.

[0053] 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.

[0054] 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 .

[0055] 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.

[0056] 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 11 is connected to the color paste inlet 12, while in the structure of the present patent, when the valve stem 4 is in the first position, the return flow channel 11 is not connected to the color paste inlet 12, thereby improving the sealing between the valve body and the valve stem, and making the leakage resistance of the valve body several times higher than that in the above-mentioned existing patents.

[0057] Embodiment 2

[0058] This embodiment provides a color mixing machine, including the color paste pump in the first embodiment.

[0059] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0060] 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 reflux flow channel 11 is not connected to the color paste inlet 12, which increases 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 reflux flow channel 11 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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 (12) and an outlet (13) communicated with the mounting cavity, and the valve body (1) also having an axially extending return flow channel (11); 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 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), small injection flow channel (45) and large injection flow channel (46), the return flow channel (11) is formed on one side of the third flow channel (43), and the valve stem (4) has a first position, a second position, a third position and a fourth position that can be switched by rotation; When the valve stem (4) is in the first position, the color paste inlet (12) is connected to the large pump body (2) and the small pump body (3) through the first flow channel (41); 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 outflow channel (46) through the fourth channel (44), and the large outflow channel (46) is connected to the outflow port (13); When the valve stem (4) is in the third position, the color paste inlet (12) is connected to the third flow channel (43) through the first flow channel (41), the third flow channel (43) is connected to the large pump body (2), the small pump body (3) is connected to the small injection flow channel (45) through the fourth flow channel (44), the small injection flow channel (45) is connected to the injection port (13), and at this time, the small piston of the small pump body (3) is located inside the cylinder of the small pump body (3); 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 (12), the reflux flow channel (11) is connected to the second flow channel (42) and the small injection flow channel (45), the small injection flow channel (45) is connected to the small pump body (3) through the fourth flow channel (44), and the large pump body (2) is connected to the first flow channel (41) through the third flow channel (43) for liquid reflux.

2. 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 first flow channel (41) has a first arm segment (411), a second arm segment (412) and a third arm segment (413) which are connected to each other. The first arm segment (411) extends along the axial direction of the valve body (1). The second arm segment (412) and the third arm segment (413) extend along the radial direction of the valve body (1) and are arranged in parallel. The third arm segment (413) is arranged on a side of the second arm segment (412) away from the color paste inlet (12). The second arm segment (412) is used to communicate with the small pump body flow channel (31), and the third arm segment (413) is used to communicate with the large pump body flow channel (21).

3. The color paste pump according to claim 1, characterized in that: The large outlet flow channel (46) and the small outlet flow channel (45) 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 flow channel (45) is smaller than the inner diameter of the large outlet flow channel (46).

4. The color paste pump according to claim 3, characterized in that: The second flow channel (42) has a fourth arm segment (421) and a fifth arm segment (422) which are connected to each other. The fourth arm segment (421) extends along the axial direction of the valve body (1), and the fifth arm segment (422) extends along the radial direction of the valve body (1). The fifth arm segment (422) is parallel to the large outlet flow channel (46) and the small outlet flow channel (45). The end of the fourth arm segment (421) away from the fifth arm segment (422) is connected to the color paste inlet (12). When the valve stem (4) is in the fourth position, the fifth arm segment (422) is connected to the return flow channel (11).

5. 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 third flow channel (43) 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 third position and the fourth position, the third flow channel (43) is connected to the large pump body flow channel (21) and the third arm section (413) of the first flow channel (41).

6. The color paste pump according to claim 3, characterized in that: The fourth flow channel (44) comprises a sixth arm segment (441), a seventh arm segment (442), an eighth arm segment (443), a ninth arm segment (444) and a tenth arm segment (445) which are arranged in communication with each other, the sixth arm segment (441) extending along the axial direction of the valve body (1), the seventh arm segment (442), the eighth arm segment (443), the ninth arm segment (444) and the tenth arm segment (445) extending along the radial direction of the valve body (1), One end of the sixth arm segment (441) is used to communicate with the large injection channel (46) and the small injection channel (45), and the other end of the sixth arm segment (441) is provided with the seventh arm segment (442), the eighth arm segment (443), and the ninth arm segment (444). The seventh arm segment (442), the eighth arm segment (443), and the ninth arm segment (444) are arranged at intervals of 90° along the circumference of the valve body (1). The seventh arm segment (442), the eighth arm segment (443), and the ninth arm segment (444) are used to communicate with the small pump body (3), and the tenth arm segment (445) is used to communicate with the large pump body (2). The seventh arm segment (442) and the eighth arm segment (443) are arranged linearly and in parallel with the large injection channel (46) and the small injection channel (45).

7. The color paste pump according to claim 1, characterized in that: Along the axial direction of the valve body (1), the valve body (1) also has a through hole (14) connected to the two ends of the return flow channel (11), and the through hole (14) extends along the radial direction of the valve body (1), and the extension directions of the two through holes (14) are parallel, one of the through holes (14) is used to communicate with the second flow channel (42), and the other through hole (14) is used to communicate with the large injection flow channel (46) or the small injection flow channel (45).

8. The color paste pump according to any one of claims 1 to 7, 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.

9. The color paste pump according to any one of claims 1 to 7, 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).

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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