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, the small pump body is located in the large pump body, and the valve body is provided with an auxiliary flow channel communicated with the valve rod and the small 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 the technology of paint color matching, and more specifically, to a color paste pump and a color matching machine. Background Art

[0002] The valve body structures of color matching pumps in the prior art are as disclosed in the patents CN201310045508.9, CN201410792555.4, and CN201410792472.5. These existing color matching pump valves can not only ensure the injection accuracy of 0.015 ml of small-measure color paste, but also achieve the injection of large-measure color paste, and at the same time have an effective structure to prevent dry blockage at the secondary outlet of the color paste. However, since the color paste contains powder solid substances, these powder solid substances have a certain wear effect on the valve body and the valve stem. In particular, minerals such as iron red and iron yellow in the color paste will have a certain wear on the valve body and the valve stem made of organic resin materials in the state without the use of lubricating oil. The wear after long-term use results in a decrease in the sealing performance of the pump valve, which will cause a certain leakage for some color pastes with low viscosity, increasing the number of automatic cleaning times of the injection nozzle of the color paste pump and increasing the number of times of replacing the cleaning liquid in the color matching machine during daily maintenance, causing certain inconvenience to users.

[0003] As can be seen from the above, the pump material in the existing color paste pump staying in the pump for a long time will cause wear to the pump body, resulting in the phenomenon of pump body damage and liquid leakage. Summary of the Utility Model

[0004] The main purpose of the present utility model is to provide one, so as to solve the problem that the pump material in the color paste pump in the prior art staying in the pump for a long time will cause wear to the pump body, resulting in pump body damage and liquid leakage.

[0005] To achieve the above object, according to one aspect of the present utility model, there is provided a color paste pump including a valve body. The valve body has an installation cavity, a color paste inlet and a injection outlet communicating with the installation cavity. 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. The valve body has an auxiliary flow channel communicating with the valve stem and the small 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, fifth flow channel, small injection flow channel and large injection flow channel. The valve stem has first position, second position, third position and fourth position for rotational switching; when the valve stem is in the first position, the first flow channel and the second flow channel communicate with the color paste inlet, the first flow channel and the second flow channel communicate with each other through the fourth flow channel, and the large pump body and the small pump body communicate with the second flow channel; when the valve stem is in the second position, the large pump body and the small pump body communicate with the large injection flow channel through the third flow channel, and the large injection flow channel communicates with the injection outlet; when the valve stem is in the third position, the small piston of the small pump body is located inside the cylinder body of the small pump body. The color paste inlet communicates with the large pump body through the first flow channel and the second flow channel. The small pump body communicates with the small injection flow channel through the third flow channel, and the small injection flow channel communicates with the injection outlet; when the valve stem is in the fourth position, the first flow channel and the second flow channel communicate with the color paste inlet, the first flow channel and the second flow channel communicate with each other through the fourth flow channel. The large pump body communicates with the color paste inlet through the first flow channel. The small pump body communicates with the fifth flow channel through the auxiliary flow channel. The large injection flow channel communicates with the fifth flow channel through the first return flow channel. The small injection flow channel communicates with the first flow channel through the second return flow channel. One end of the large injection flow channel and the small injection flow channel close to each other communicates with each other.

[0006] Further, along the axial direction of the valve body, the auxiliary flow channel is arranged on the side of the first flow channel and the second flow channel away from the color paste inlet.

[0007] Further, the valve body has a radially extending small pump body flow channel and a large pump body flow channel communicating with the installation cavity. The large pump body flow channel includes a first large pump body sub-flow channel and a second large pump body sub-flow channel arranged at intervals along the axial direction of the valve body. The first large pump body sub-flow channel and the second large pump body sub-flow channel are arranged on both sides of the small pump body. The auxiliary flow channel is communicated with the small pump body 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 communicates with the first flow channel; when the valve stem is in the second position, the second large pump body sub-flow channel communicates with the third flow channel.

[0008] Further, the auxiliary flow channel is arranged on the side of the small pump body flow channel away from the color paste inlet.

[0009] Further, the third flow channel has a first arm section, a second arm section, a third arm section, and a fourth arm section that are connected in series. The first arm section extends along the axial direction of the valve body, and the second arm section, the third arm section, and the fourth arm section extend along the radial direction of the valve body. The second arm section and the third arm section are collinear, the second arm section and the fourth arm section are parallel and extend in the same direction, the second arm section and the third arm section are arranged on the side of the first arm section close to the color paste inlet, the second arm section and the third arm section are used to communicate with the small pump body flow channel, and the fourth arm section is used to communicate with the second large pump body sub-flow channel.

[0010] Further, the extension length of the first arm section along the axial direction of the valve body is greater than the distance between the auxiliary flow channel and the small injection flow channel and the large injection flow channel.

[0011] Further, the extension length of the first arm section along the axial direction of the valve body is greater than the extension length of the first return flow channel and less than the extension length of the second return flow channel; and / or along the axial direction of the valve body, the second arm section and the third arm section are located on the side of the first return flow channel facing the color paste inlet.

[0012] Further, the large injection flow channel and the small injection flow channel are collinear and connected along the radial direction of the valve body. The inner diameter of the small injection flow channel is smaller than the inner diameter of the large injection flow channel. Both the large injection flow channel and the small injection flow channel are connected to the third flow channel.

[0013] Further, the valve body has a small pump body flow channel and a large pump body flow channel that extend radially and are connected to the installation cavity. The fifth flow channel is a groove structure formed on the outer peripheral surface of the valve stem. The groove structure extends along the circumferential direction of the valve stem. The outer peripheral surface of the valve stem fits with the inner peripheral surface of the valve body. The inner peripheral 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 through the auxiliary flow channel, and the other end of the fifth flow channel is connected to the first return flow channel.

[0014] Further, along the circumferential direction of the valve body, the first return flow channel and the second return flow channel are arranged at an interval of 180°; along the axial direction of the valve body, the extension length of the first return flow channel is less than the extension length of the second return flow channel.

[0015] Further, the first position rotates 90 degrees clockwise to form the second position, the second position rotates 90 degrees clockwise to form the fourth position, the fourth position rotates 90 degrees clockwise to form the third position, and the fourth position rotates 90 degrees clockwise to form the first position.

[0016] According to another aspect of the present invention, a color mixer is provided, and the color mixer includes the above-mentioned color paste pump.

[0017] Applying the technical solution of the present invention, the following technical effects are achieved:

[0018] 1. Through the rotation of the valve body and the design of multiple flow channels inside the valve body, when the valve stem rotates, it is convenient to allow liquid to flow through different flow channels, thereby controlling the liquid flow direction and completing different liquid flow actions. In the first position, neither the first return flow channel nor the second return flow channel is connected to the color paste inlet, improving the sealing performance between the valve body and the valve stem. When it is necessary to return the valve stem, the valve stem rotates and switches to the return position. At this time, the color paste will flow back through the first return flow channel and the second return flow channel opened on the valve body to prevent the color paste remaining inside the valve body from wearing the valve body and the valve stem, thereby achieving the anti-leakage effect of increasing the valve stem and valve body through the return flow of the valve body.

[0019] 2. By setting up an auxiliary flow channel, the length of the first return flow channel can be changed so that the end of the first return flow channel far from the injection outlet is not connected to the third flow channel. In this way, when the valve stem is in the fourth position and the valve body and the valve stem are returned, the color paste can not enter the third flow channel, reducing the flow travel of the color paste, improving the return efficiency, and since the color paste does not flow in the third flow channel during the return process, the wear of the third flow channel caused by the flow of the color paste can be reduced.

[0020] 3. Through the rotation of the valve stem, the valve stem of the present application can be rotated and switched between four different positions. To facilitate the rotation of the valve stem, the valve stem of the present application rotates the same angle each time, that is, a quarter of an arc, 90 degrees. In this way, each time the position of the valve stem needs to be changed, the same degree of rotation of the casing is carried out, reducing the operation difficulty of rotating the valve stem. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The schematic diagrams in the specification that form a part of the present application are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0022] Figure 1 is the overall structural schematic diagram of the color paste pump provided by the present utility model;

[0023] Figure 2 is the schematic diagram of the valve body part of the color paste pump provided by the present utility model;

[0024] Figure 3 is the structural schematic diagram of the valve stem provided by the present utility model;

[0025] Figure 4 is the schematic diagram of the valve stem flow channel at the first position of the valve stem provided by the present utility model;

[0026] Figure 5 is the schematic diagram of the valve stem flow channel at the second position of the valve stem provided by the present utility model;

[0027] Figure 6Schematic diagram of the valve stem flow channel at the third position of the valve stem provided by the present utility model;

[0028] Figure 7 Schematic diagram of the valve stem flow channel at the fourth position of the valve stem provided by the present utility model.

[0029] Among them, the above-mentioned drawings include the following reference numerals:

[0030] 1. Valve body; 11. First return flow channel; 12. Second return flow channel; 13. Color paste inlet; 14. Injection outlet; 15. Auxiliary flow channel; 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 section; 412. Sixth arm section; 413. Seventh arm section; 414. Eighth arm section; 42. Second flow channel; 421. Ninth arm section; 422. Tenth arm section; 423. Eleventh arm section; 43. Third flow channel; 431. First arm section; 432. Second arm section; 433. Third arm section; 434. Fourth arm section; 44. Fourth flow channel; 45. Fifth flow channel; 46. Small injection flow channel; 47. Large injection flow channel; 5. Driving pin. Detailed implementation manners

[0031] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0032] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0033] In the present utility model, unless otherwise stated, the orientation words such as "upper, lower, top, bottom" are usually in the directions shown in the drawings, or in the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contours of the components themselves, but the above orientation words are not used to limit the present utility model. Embodiment

[0034] In order to solve the problem that the pump material in the color paste pump in the prior art remains in the pump for a long time, which will cause wear to the pump body, resulting in damage and leakage of the pump body, the present application provides a color paste pump. By adding a return flow channel on the valve body, the color paste remaining inside the valve body can be recovered through the return flow, which is beneficial to reducing the wear of the color paste on the valve body and the valve stem, thereby ensuring the sealing performance of the valve body and reducing the occurrence of leakage.

[0035] A color paste pump, see Figures 1 to 7, including a valve body 1, a large pump body 2, a small pump body 3, and a valve stem 4. The valve body 1 has an installation cavity, a color paste inlet 13 and a discharge outlet 14 communicating with 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, and the small pump body 3 is located inside the large pump body 2. The valve body 1 has an auxiliary flow channel 15 communicating with the valve stem 4 and the small pump body 3. 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 discharge flow channel 46 and large discharge flow channel 47. The valve stem 4 has first, second, third and fourth positions for rotational switching.

[0036] When the valve stem 4 is in the first position, the first flow channel 41 and the second flow channel 42 communicate with the color paste inlet 13. The first flow channel 41 and the second flow channel 42 communicate with each other through the fourth flow channel 44. The large pump body 2 and the small pump body 3 communicate with 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 communicate with the large discharge flow channel 47 through the third flow channel 43, and the large discharge flow channel 47 communicates with the discharge outlet 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 body of the small pump body 3, the color paste inlet 13 communicates with the large pump body 2 through the first flow channel 41 and the second flow channel 42. The small pump body 3 communicates with the small discharge flow channel 46 through the third flow channel 43, and the small discharge flow channel 46 communicates with the discharge outlet 14.

[0039] When the valve stem 4 is in the fourth position, the first flow channel 41 and the second flow channel 42 communicate with the color paste inlet 13. The first flow channel 41 and the second flow channel 42 communicate with each other through the fourth flow channel 44. The large pump body 2 communicates with the color paste inlet 13 through the first flow channel 41. The small pump body 3 communicates with the fifth flow channel 45 through the auxiliary flow channel 15. The large discharge flow channel 47 communicates with the fifth flow channel 45 through the first return flow channel 11. The small discharge flow channel 46 communicates with the first flow channel 41 through the second return flow channel 12. One end of the large discharge flow channel 47 and the small discharge flow channel 46 close to each other communicate with each other.

[0040] When the valve stem 4 is in the first position, at this time, the piston in the large pump body 2 will pull upward to suck the color paste in the color paste bucket 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 sucking a certain amount of color paste, the large piston pump of the large pump body 2 drives the small piston of the small pump body 3 to be pressed down together 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 is returned to the color paste bucket. 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 and maintain a sealed structure, and both the small injection flow channel 46 and the large injection flow channel 47 are not connected to the injection outlet 14 and maintain a seal. There is no color paste inside 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, avoiding the problem that the color paste wears the valve body 1 and affects the sealing performance of the valve body 1.

[0042] When the valve stem 4 is in the second position, when the 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, the color paste will flow out through the third flow channel 43 communicating with the large pump body 2 and the small pump body 3. Since the large injection flow channel 47 is connected to the injection outlet 14 at this time, the color paste will flow out from the injection outlet 14 through the large injection flow channel 47 communicating with the third flow channel 43. This state is the position state where a large amount of color paste is injected and the large injection nozzle discharges color paste.

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

[0044] 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 body of the small pump body 3, at this time, 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 corresponding to the small piston and the cylinder body of the small pump body 3. The large piston of the small pump body 3 presses down through the driving component to realize the backflow of the color paste inside the large pump body 2 through the first flow channel 41 communicating with the color paste inlet 13. When the small piston of the small pump body 3 presses down through the driving component, the color paste will flow out through the third flow channel 43 communicating with the small pump body 3. At this time, since the small injection flow channel 46 is connected to the injection outlet 14, the color paste will flow out from the injection outlet 14 through the small injection flow channel 46 communicating with the third flow channel 43. This state is the position state where the small injection flow channel 46 discharges the color paste pump. The liquid discharge of the small injection flow channel 46 is only controlled by the small pump body 3, which is beneficial to improving the liquid discharge accuracy of the small injection flow channel 46.

[0045] When the valve stem 4 is in the fourth position, under the pressing action of the large piston of the large pump body 2 and the small piston of the small pump body 3, the color paste enters the second return flow channel 12 through the first flow channel 41, then enters the first return flow channel 11 through the small injection flow channel 46 and the large injection flow channel 47, and then enters the small pump body 3 through the fifth flow channel 45 communicating with the first return flow channel 11. Or, the color paste directly enters the large pump body 2 from the first flow channel 41. The two circuits of the color paste are connected inside the large pump body 2 and the small pump body 3. This position is the backflow state of the color paste.

[0046] 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 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, the auxiliary flow channel 15 is arranged along the axial direction of the valve body 1 on a side of the first flow channel 41 and the second flow channel 42 away from the color paste inlet 13 .

[0048] The auxiliary flow channel 15 is mainly used to cooperate with the fifth flow channel 45, and is connected to the first return flow channel 11 through the fifth flow channel 45. The auxiliary flow channel 15 is set on the side of the first flow channel 41 and the second flow channel 42 away from the color paste inlet 13, which can reduce the interference between the fifth flow channel 45 and the first flow channel 41 and the second flow channel 42.

[0049] 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 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 which are arranged at intervals along the axial direction of the valve body 1. The first large pump body sub-flow channel 211 and the second large pump body sub-flow channel 212 are arranged on both sides of the small pump body 3, and the auxiliary flow channel 15 is connected to the small pump body flow channel 31; 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 connection of the color paste between the second flow channel 42 and the large pump body 2 and the small pump body 3, and the flow of the color paste 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 providing two different large pump body flow channels 21, it is convenient for the valve stem 4 to communicate with different large pump body flow channels 21 when in different positions, and the number of flow channels provided in the valve stem 4 can be reduced, so that it is convenient to cooperate with different large pump body flow channels 21 when in different positions of the valve stem 4. At the same time, since the number of flow channels in the valve stem 4 is reduced, it is convenient to produce and process the valve stem 4.

[0052] Further, the auxiliary flow channel 15 is arranged on the side of the small pump body flow channel 31 away from the color paste inlet 13.

[0053] In the fourth position, the auxiliary flow channel 15 cooperates with the fifth flow channel 45 to facilitate the return flow of the valve stem 4 of the valve body 1. The two ends of the fifth flow channel 45 are respectively connected to the auxiliary flow channel 15 and the first return flow channel 11. Since the auxiliary flow channel 15 is arranged on the side of the small pump body flow channel 31 away from the color paste inlet 13, the length of the first return flow channel 11 can be shortened, making the length of the first return flow channel 11 less than the length of the third flow channel 43. When the valve stem 4 is in the fourth position, one end of the third flow channel 43 and the first return flow channel 11 close to the injection outlet 14 are connected through the large injection flow channel 47, and the other end cannot be connected due to the length difference between the third flow channel 43 and the first return flow channel 11. In this way, during the return flow of the color paste, the color paste can enter the third flow channel 43 without passing through the first return flow channel 11.

[0054] In the present application, 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 that are connected. 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, 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 the 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.

[0055] The third flow channel 43 is set into different arm segments, 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 communicate 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. At different positions, different arm segments are used to cooperate with different flow channels to facilitate the flow of the color paste between the valve stem 4, the large pump body 2, and the small pump body 3, and the stability of the color paste flow is increased.

[0056] Further, the extension length of the first arm segment 431 along the axial direction of the valve body 1 is greater than the distance between the auxiliary flow channel 15, the small injection flow channel 46, and the large injection flow channel 47.

[0057] The length of the first arm section 431 is greater than the distance between the auxiliary flow channel 15 and the small injection flow channel 46 and the large injection flow channel 47, resulting in different distances between the first arm section 431 and the auxiliary flow channel 15 and between the large injection flow channel 47 and the small injection flow channel 46. The auxiliary flow channel 15 is connected to the first return flow channel 11 through the fifth flow channel 45. When the valve stem 4 is in the fourth position, the end of the fifth flow channel 45 far from the auxiliary flow channel 15 cannot be connected to the first arm section 431. In this way, during the process of color paste reflux, the color paste can enter the first arm section 431 without passing through the first return flow channel 11.

[0058] Furthermore, along the axial direction of the valve body 1, the extending length of the first arm section 431 is greater than the extending length of the first return flow channel and less than the extending length of the second return flow channel 12.

[0059] By adopting the above scheme, the length of the first arm section 431 is different from the lengths of both the first return flow channel 11 and the second return flow channel 12. When the valve stem 4 is in the fourth position, the end of the first arm section 431 close to the injection outlet 14 is connected to the first return flow channel 11 through the large injection flow channel 47 and is connected to the second return flow channel 12 through the small injection flow channel 46. However, since the length of the first arm section 431 is different from both the first return flow channel 11 and the second return flow channel 12, the end of the first arm section 431 far from the injection outlet 14 cannot be connected to the first return flow channel 11 and the second return flow channel 12. During the process of color paste reflux, the color paste can enter the first arm section 431 without passing through the first return flow channel 11.

[0060] Furthermore, along the axial direction of the valve body 1, the second arm section 432 and the third arm section 433 are located on the side of the first return flow channel 11 facing the color paste inlet 13.

[0061] This can prevent the second arm section 432 and the third arm section 433 from crossing the first return flow channel 11, and when the valve stem 4 rotates, it can avoid interference between the second arm section 432 and the third arm section 433.

[0062] In this application, the large injection flow channel 47 and the small injection flow channel 46 are collinear and connected along the radial direction of the valve body 1. The inner diameter of the small injection flow channel 46 is smaller than the inner diameter of the large injection flow channel 47. Both the large injection flow channel 47 and the small injection flow channel 46 are connected to the third flow channel 43.

[0063] Both the large injection outlet channel 47 and the small injection outlet channel 46 are connected to the third channel 43. After the valve stem 4 rotates, when the large injection outlet channel 47 is connected to the injection outlet 14, it is in the large injection state, and at this time, a large amount of color paste can be injected; when the small injection outlet channel 46 is connected to the injection outlet 14, it is in the small injection state, and at this time, precise injection of the color paste can be carried out. The radial co-linearity and connection of the large injection outlet channel 47 and the small injection outlet channel 46 facilitate the docking of the large injection outlet channel 47 or the small injection flow with the injection outlet 14. In this way, with the injection outlet 14 remaining unchanged, only by rotating the valve stem 4 and changing the docking of the large injection outlet channel 47 or the small injection outlet channel 46 with the injection outlet 14, the switching between the large injection state and the small injection state can be completed.

[0064] Furthermore, the valve body 1 is provided with a radially extending small pump body channel 31 and a large pump body channel 21 that are connected to the installation cavity. The fifth channel 45 is a groove structure formed on the outer peripheral surface of the valve stem 4, and the groove structure extends along the circumferential direction of the valve stem 4. The outer peripheral surface of the valve stem 4 fits with the inner peripheral surface of the valve body 1, and the inner peripheral surface of the valve body 1 shields the notch of the groove structure to form a sealed channel structure. When the valve stem 4 is in the fourth position, one end of the fifth channel 45 is connected to the small pump body 3 through the auxiliary channel 15, and the other end of the fifth channel 45 is connected to the first return channel 11.

[0065] By adopting the above structural arrangement, the fifth channel 45 is arc-shaped and is located on the outer periphery of the valve stem 4, formed after the cooperation of the valve stem 4 and the valve body 1. Since the fifth channel 45 is located on the outer periphery of the valve stem 4, it is convenient to process the valve stem 4 during the production and forming process of the valve stem 4. Since the fifth channel 45 is arc-shaped and is on the outer periphery of the valve stem 4, compared with the other channels inside the valve stem 4, the fifth channel 45 can avoid interference with the other channels and increase the stability of the flow of the color paste inside the valve stem 4.

[0066] In the present application, along the circumferential direction of the valve body 1, the first return channel 11 and the second return channel 12 are arranged at an interval of 180°; along the axial direction of the valve body 1, the extension length of the first return channel is greater than the extension length of the second return channel 12.

[0067] From the overall structure, the first return channel 11 and the second return channel 12 are respectively located on both sides of the valve body 1, which can facilitate the design of different channels inside the valve stem 4 and is convenient for switching different positions in cooperation with the valve stem 4. Especially in the fourth position, when performing reflux, the first return channel 11 and the second return channel 12 can simultaneously perform reflux operations on both the large injection outlet channel 47 and the small injection outlet channel 46. The lengths of the first return channel 11 and the second return channel 12 are different, which is convenient for cooperation with different channels.

[0068] Further, the first position rotates 90 degrees clockwise to form the second position, the second position rotates 90 degrees clockwise to form the fourth position, the fourth position rotates 90 degrees clockwise to form the third position, and the fourth position rotates 90 degrees clockwise to form the first position.

[0069] By rotating the valve stem 4, the valve stem 4 is switched between four different positions. To facilitate the control of the rotation of the valve stem 4 and ensure the accuracy after each rotation, the valve stem 4 can be rotated by the same angle each time, that is, a quarter arc of 90 degrees. In this way, each time the position of the valve stem 4 needs to be changed, rotating by the same angle can reduce the operation difficulty of rotating the valve stem 4.

[0070] It should be noted that the first flow channel 41 has a fifth arm section 411, a sixth arm section 412, a seventh arm section 413, and an eighth arm section 414 that are connected in series. The fifth arm section 411 extends along the axial direction of the valve body 1, and the sixth arm section 412, the seventh arm section 413, and the eighth arm section 414 extend along the radial direction of the valve body 1. The sixth arm section 412 is collinear with the fourth flow channel 44, the seventh arm section 413 is perpendicular to the fourth flow channel 44, the eighth arm section 414 is provided at one end of the fifth arm section 411 away from the color paste inlet 13, and the eighth arm section 414 is parallel to the seventh arm section 413 and is arranged at an interval of 180° along the circumferential direction of the valve body 1; when the valve body 1 is in the third position, the seventh arm section 413 communicates with the large pump body 2; when the valve body 1 is in the fourth position, the sixth arm section 412 communicates with the large pump body 2, and the eighth arm section 414 communicates with the second return flow channel 12.

[0071] The first flow channel 41 is set into different arm sections. The fifth arm section 411 serves as the main arm section, and the sixth arm section 412, the seventh arm section 413, and the eighth arm section 414 are used to cooperate with different flow channels. Through the protruding sixth arm section 412, seventh arm section 413, and eighth arm section 414, when the valve stem 4 is in the first position, the fifth arm section 411 communicates with the color paste inlet 13; when the valve stem 4 is in the third position, the seventh arm section 413 communicates with the large pump body 2; when the valve body 1 is in the fourth position, the sixth arm section 412 communicates with the large pump body 2, and the eighth arm section 414 communicates with the second return flow channel 12. At different positions, different arm sections cooperate with different flow channels, facilitating 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 increasing the stability of the color paste flow.

[0072] The second flow channel 42 includes a ninth arm section 421, a tenth arm section 422, and an eleventh arm section 423 that are connected in series. The tenth arm section 422 is collinear and connected with the fourth flow channel 44, the tenth arm section 422 and the eleventh arm section 423 are parallel, and the eleventh arm section 423 is located at one end of the ninth arm section 421 away from the color paste inlet 13, and the eleventh arm section 423 communicates with the small pump body 3.

[0073] The second flow channel 42 is set as 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 tenth arm segment and the eleventh arm segment 423, when the valve stem 4 is in the first position, the tenth arm segment 422 communicates with the large pump body 2, and the eleventh arm segment 423 communicates with the small pump body 3. Through the cooperation of different arm segments and different flow channels, the second flow channel 42 cooperates with the large pump body 2 and the small pump body 3, increasing the stability of the color paste flow.

[0074] In the present application, the color paste pump further includes a drive pin 5. At least another part of the valve stem 4 is exposed outside the valve body 1, and the drive pin 5 is arranged on the part of the valve stem 4 exposed outside the valve body 1.

[0075] When it is necessary to rotate the valve stem 4, by driving the drive pin 5, it is convenient to drive the valve stem 4 to rotate. Since the drive pin 5 is arranged outside the valve body 1, when operating the drive pin 5, it is convenient and fast. Embodiment

[0076] This embodiment provides a color mixer, including the color paste pump in Embodiment 1.

[0077] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0078] 1. Through the rotation of the valve body 1 and the design of multiple flow channels in the valve body 1, when the valve stem 4 rotates, it is convenient to conduct liquid flow in different flow channels, thereby controlling the liquid flow direction and completing different liquid flow actions. In the first position, neither the first return flow channel 11 nor the second return flow channel 12 communicates with the color paste inlet 13, improving the sealing performance between the valve body 1 and the valve stem 4. When it is necessary to conduct a return flow for the valve stem 4, the valve stem 4 rotates and switches to the return position. At this time, the color paste will flow back through the first return flow channel 11 and the second return flow channel 12 opened on the valve body 1 to avoid the color paste remaining inside the valve body 1 from wearing the valve body 1 and the valve stem 4, thereby achieving the anti-leakage effect of increasing the valve stem 4 and the valve body 1 through the return flow of the valve body 1.

[0079] 2. By setting the auxiliary flow channel 15, the length of the first return flow channel 11 can be changed, so that the end of the first return flow channel 11 far from the injection outlet 14 does not communicate with the third flow channel 43. In this way, when the valve stem 4 is in the fourth position and a return flow is conducted for the valve body 1 and the valve stem 4, the color paste can not enter the third flow channel 43, reducing the flow travel of the color paste and improving the return flow efficiency. And since the color paste does not flow in the third flow channel 43 during the return flow process, the wear of the third flow channel 43 caused by the flow of the color paste can be reduced.

[0080] 3. By rotating the valve stem 4, the valve stem 4 of the present application can be rotated and switched between four different positions. To facilitate the rotation of the valve stem 4, the valve stem 4 of the present application rotates by the same angle each time, that is, a quarter of an 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 operation difficulty of rotating the valve stem 4.

[0081] 4. When the valve core rotates to the closed position, neither the first radial injection channel nor the first radial injection channel can communicate with the color paste injection port, further improving the sealing performance of the valve body. At the same time, when the first piston abuts against the sealing tube for limiting, the first inlet and outlet channel is blocked, further increasing the sealing performance of the valve body.

[0082] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0083] 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, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0084] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein.

[0085] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

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 therein; 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) being rotatably disposed inside the valve body (1), the valve stem (4) having independently disposed first flow passages (41), second flow passages (42), third flow passages (43), fourth flow passages (44), fifth flow passages (45), small injection flow passages (46) and large injection flow passages (47), the valve body (1) having an auxiliary flow passage (15) communicating with the valve stem (4) and the small pump body (3), 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) and the second flow channel (42) are in communication with each other 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 in communication with the large outflow channel (47) via the third channel (43), and the large outflow channel (47) is in communication with the outflow port (14); When the valve stem (4) is in the third position, 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) and the second flow channel (42), 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 in communication with the color paste inlet (13), the first flow channel (41) and the second flow channel (42) are in communication with each other via the fourth flow channel (44), the large pump body (2) is in communication with the color paste inlet (13) via the first flow channel (41), the small pump body (3) is in communication with the fifth flow channel (45) via the auxiliary flow channel (15), the large outlet flow channel (47) is in communication with the fifth flow channel (45) via the first return flow channel (11), the small outlet flow channel (46) is in communication with the first flow channel (41) via the second return flow channel (12), and the large outlet flow channel (47) and the small outlet flow channel (46) are in communication with each other at their ends close to each other.

2. The color paste pump according to claim 1, characterized in that: The auxiliary flow channel (15) is arranged along the axial direction of the valve body (1) on a side of the first flow channel (41) and the second flow channel (42) that is away from the color paste inlet (13).

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. 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) which are arranged at intervals along the axial direction of the valve body (1). The first large pump body sub-flow channel (211) and the second large pump body sub-flow channel (212) are arranged on both sides of the small pump body (3). The auxiliary flow channel (15) is arranged in communication with the small pump body flow channel (31). 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).

4. The color paste pump according to claim 3, characterized in that: The auxiliary flow channel (15) is arranged on a side of the small pump body flow channel (31) away from the color paste inlet (13).

5. 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); and the fourth arm segment (434) is used to communicate with the second large pump body sub-flow channel (212).

6. The color paste pump according to claim 5, characterized in that: The extension length of the first arm section (431) along the axial direction of the valve body (1) is greater than the distance between the auxiliary flow channel (15) and the small injection flow channel (46) and the large injection flow channel (47).

7. The color paste pump according to claim 5, characterized in that: An extension length of the first arm section (431) along the axial direction of the valve body (1) is greater than an extension length of the first return flow channel (11) and less than an extension length of the second return flow channel (12); and / or Along the axial direction of the valve body (1), the second arm section (432) and the third arm section (433) are located on a side of the first return flow channel (11) facing the color paste inlet (13).

8. The color paste pump according to claim 1, characterized in that: The large outlet flow channel (47) and the small outlet flow 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 flow channel (46) is smaller than the inner diameter of the large outlet flow channel (47); and both the large outlet flow channel (47) and the small outlet flow channel (46) are in communication with the third flow channel (43).

9. 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) through the auxiliary flow channel (15), and the other end of the fifth flow channel (45) is connected to the first return flow channel (11).

10. The color paste pump according to any one of claims 1 to 8, 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°; Along the axial direction of the valve body (1), the extension length of the first return flow channel (11) is smaller than the extension length of the second return flow channel (12).

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

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

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