Injection-out structure and liquid blending equipment

Abstract

The utility model relates to the technical field of liquid blending equipment, in particular to an outpouring structure and liquid blending equipment, the outpouring structure is used for outpouring color paste of the liquid blending equipment, the outpouring structure comprises an outpouring pipe fitting, at least part of the outpouring pipe fitting is a spiral spring pipe, and one end of the outpouring pipe fitting is used for being in butt joint with a paint outlet pipe of the liquid blending equipment; and a nozzle is arranged at the other end of the injection pipe fitting. According to the injection-out structure and the liquid blending equipment provided by the invention, the paint spraying precision and uniformity are improved, the risk that the hose is abraded or damaged due to friction is reduced, the space is saved, the paint make-up operation is smoother, the moving freedom degree, the operation flexibility and the efficiency of operators are improved, and the labor intensity of the operators is reduced. And obvious improvement and convenience are brought to automobile paint repair operation.

Description

Technical Field

[0001] This application relates to the field of liquid preparation equipment, and in particular to a dispensing structure and liquid preparation equipment. Background Technology

[0002] Liquid preparation is a common process in many fields, such as industrial applications like automotive paint, latex paint, and varnish, as well as everyday liquid products like liquid seasonings and liquid emulsion cosmetics. These are all mixtures of multiple components. In the preparation process, especially in customized preparation for single products, different raw materials are selected and mixed according to order requirements. These raw materials are typically stored in raw material containers. A pump and valve assembly pumps the liquid materials from the containers through a dispensing pipe, ultimately spraying them into the preparation container via a nozzle. Subsequent mixing and other processes then produce the desired product.

[0003] As a key pipeline connecting the paint outlet pipe of the raw material tank and the nozzle, the injection pipe needs to be easy to pull within a certain range during the injection process so that the liquid mixing equipment can perform the dispensing action within a certain range.

[0004] Nowadays, liquid dispensing equipment generally uses a flexible hose structure for its dispensing pipe. While this design improves operational flexibility to some extent, it also brings some problems. The hose is prone to sagging under its own weight, which not only affects the accuracy and uniformity of the nozzle and causes a cluttered environment, but may also cause the hose to rub against the ground or other objects, resulting in hose wear or damage. During movement, the hose may interfere with other components (such as the vehicle body, frame, etc.), which may hinder paint touch-up work or damage the hose.

[0005] To avoid the aforementioned problems, a support point is typically placed in the middle of the hose structure, resulting in an inverted U-shape. However, this inverted U-shaped hose structure requires a significant amount of space, and the larger the paint application area, the more space it occupies. This is because the hose needs to maintain a certain length on both sides of the support point to ensure it can cover the required nozzle movement distance. Furthermore, this structure may restrict the operator's range of movement. Utility Model Content

[0006] The purpose of this application is to provide an injection structure and liquid mixing device to solve, to a certain extent, the technical problems existing in the prior art, such as the hose sagging easily when affected by its own weight, affecting the accuracy and uniformity of painting, causing environmental clutter, and potentially causing the hose to rub against the ground or other objects, resulting in hose wear or damage. In addition, setting a support point in the middle section of the hose structure to make the hose structure an inverted U-shape requires a lot of space for the hose structure and may also limit the operator's movement range.

[0007] According to a first aspect of this application, an injection structure is provided for injecting pigments into a liquid mixing device. The injection structure includes an injection tube, at least a portion of which is a helical spring tube. One end of the injection tube is used to connect with the paint outlet tube of the liquid mixing device, and the other end of the injection tube is provided with a nozzle.

[0008] Preferably, the injection fitting further includes a straight guide tube, through which the nozzle and the helical spring tube are connected.

[0009] Preferably, the spiral spring tube, the straight guide tube, and the nozzle are integrated into a single connecting pipe.

[0010] Preferably, the liquid mixing equipment includes a color paste tank, the paint outlet pipe is connected to the color paste tank to pump out the color paste stored in the color paste tank, and the top of the color paste tank is provided with a grouting port;

[0011] When the injection structure is in an idle state, the nozzle can be fixed to the top of the pigment tank, and the nozzle is arranged opposite to the injection port.

[0012] Preferably, the liquid preparation device further includes a cover, which is disposed over the grouting port;

[0013] The cover is detachably connected to the color paste tank;

[0014] The cover is provided with a mounting hole that communicates with the grouting port, and the nozzle is inserted and fixed to the cover through the mounting hole.

[0015] Preferably, the cover includes a cover body and a socket, and the mounting hole is disposed in the socket;

[0016] The cover body and the plug-in socket are connected as one unit;

[0017] Alternatively, the cover body and the connector can be detachably connected.

[0018] Preferably, it further includes a guide portion, which is fixed to the cover body. The liquid outlet portion of the injection tube is fixed to one side of the cover body via the guide portion, so that the liquid outlet portion can extend along the extension direction of the mounting hole. The liquid outlet portion is the portion of the injection tube that is not inserted into the mounting hole and is closer to one end of the cover body.

[0019] Preferably, the guide portion includes a first guide plate, an insertion plate, a second guide plate, and a fixing plate. The first guide plate and the second guide plate both extend along the extension direction of the mounting hole. The first guide plate and the second guide plate are respectively disposed on both sides of the injection fitting, and the first guide plate and the second guide plate are arranged sequentially in the extension direction of the mounting hole.

[0020] The insertion plate connects the first guide plate and the second guide plate, and the insertion plate is provided with an insertion hole that extends through itself along the extension direction of the placement hole, so that the injection fitting can pass through;

[0021] The fixing plate is connected to the end of the second guide plate away from the insertion plate, and the fixing plate is in contact with the surface of the cover.

[0022] Preferably, the guide portion further includes a clearance portion, which is disposed at one end of the first guide plate away from the socket plate, and the clearance portion bends from the first guide plate toward the side away from the first guide plate.

[0023] According to a second aspect of this application, a liquid preparation device is provided, including the dispensing structure described in any of the above technical solutions, and thus possesses all the beneficial technical effects of the dispensing structure, which will not be repeated here.

[0024] Compared with the prior art, the beneficial effects of this application are as follows:

[0025] The injection structure provided in this application specifies that at least a portion of the fitting is configured as a helical spring tube. This structure inherently possesses a certain degree of rigidity and support, effectively resisting sagging caused by its own weight. This ensures the stability and continuity of the pigment during injection, contributing to improved paint accuracy and uniformity, resulting in a more ideal touch-up effect. The helical spring tube design reduces direct contact between the hose and the ground or other objects, thereby lowering the risk of hose wear or damage due to friction. Simultaneously, the helical spring tube's elasticity provides some cushioning against external impacts, further protecting the hose from damage. Compared to the traditional inverted U-shaped hose structure, the injection structure of this application eliminates the need for additional support points, saving space. The flexibility of the helical spring tube allows it to bend and extend as needed (e.g., to cooperate with a material handling mechanism (robotic arm) for extension in other directions) to accommodate different nozzle movement distances and angles without interfering with other components. This not only makes the touch-up painting operation smoother but also improves the operator's freedom of movement, operational flexibility, and efficiency, bringing significant improvements and convenience to automotive paint touch-up operations.

[0026] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 A canometric structural schematic diagram of the liquid preparation equipment provided in the embodiments of this application in an idle state;

[0029] Figure 2 for Figure 1 A magnified structural diagram of the provided liquid preparation equipment at point A;

[0030] Figure 3 for Figure 2 A magnified schematic diagram of the provided liquid preparation equipment at point B;

[0031] Figure 4 This is a partial cross-sectional structural diagram of the cover provided in an embodiment of this application;

[0032] Figure 5 for Figure 4 An enlarged structural diagram of the partial cross-sectional structure of the provided cover at point C;

[0033] Figure 6 A canometric structural schematic diagram of the liquid preparation equipment provided in the embodiment of this application in its use state;

[0034] Figure 7 This is a schematic diagram of the exploded structure of a liquid mixing device provided in an embodiment of this application.

[0035] Figure label:

[0036] 11-Helical spring tube; 12-Straight guide tube; 13-Nozzle; 14-Connecting part; 15-Guide part; 151-First guide plate; 152-Second guide plate; 153-Insertion plate; 154-Fixing plate; 155-Allowing part; 16-Snap-fit ​​part; 17-Limiting part; 2-Color paste bucket; 20-Injection port; 3-Cover body; 31-Insertion seat; 32-Cover body; 4-Paint outlet pipe.

[0037] F1 - First direction; F2 - Second direction; F3 - Third direction. Detailed Implementation

[0038] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0039] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0040] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0041] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] The following reference Figures 1 to 7 This application describes the dispensing structure and liquid preparation equipment according to some embodiments.

[0044] See Figures 1 to 7 As shown, an embodiment of the first aspect of this application provides an injection structure for injecting pigments from a liquid mixing device. The injection structure includes a docking part 14 and an injection pipe. At least a portion of the injection pipe is a spiral spring tube 11. The docking part 14 is disposed at one end of the injection pipe and is used to dock with the paint outlet pipe 4 of the liquid mixing device. A nozzle 13 is disposed at the other end of the injection pipe.

[0045] According to the injection structure provided by the aforementioned technical features, at least a portion of the nozzle is configured as a helical spring tube 11. This structure itself possesses a certain rigidity and support, effectively resisting sagging caused by its own weight, thereby ensuring the stability and continuity of the pigment during injection. This helps improve the accuracy and uniformity of the paint application, resulting in a more ideal touch-up effect. The design of the helical spring tube 11 reduces direct contact between the hose and the ground or other objects, thereby reducing the risk of wear or damage to the hose due to friction. Simultaneously, due to the elasticity of the helical spring tube 11, it can buffer external impacts to a certain extent, further protecting the hose from damage. Compared to the traditional inverted U-shaped hose structure, the injection structure of this application does not require additional support points, thus saving space. The flexibility of the helical spring tube 11 allows it to bend and extend as needed (e.g., it can extend in other directions in conjunction with the material handling mechanism (robotic arm)) to adapt to different nozzle movement distances and angles without interfering with other components. This not only makes the touch-up painting operation smoother but also improves the operator's freedom of movement, operational flexibility, and efficiency, bringing significant improvements and convenience to automotive touch-up operations.

[0046] Preferably, such as Figures 1 to 6 As shown, the above-mentioned injection fitting may also include a straight guide tube 12, through which the nozzle 13 and the helical spring tube 11 can be connected. This allows the injection fitting to possess both the flexible bending characteristics of the helical spring tube 11 and the ability to achieve more precise directional spraying via the straight guide tube 12. This not only allows the operator to maintain flexibility within a certain range but also enables precise control of the spray direction of the injection fitting, improving the overall efficiency and quality of the paint touch-up operation.

[0047] For ease of description, the extending direction of the aforementioned helical spring tube 11 is defined as the first direction F1, and two directions perpendicular to each other on a plane perpendicular to the first direction F1 are defined as the second direction F2 and the third direction F3. Here, F1 shown in the figure can be an example of the aforementioned first direction F1, F2 shown in the figure can be an example of the aforementioned second direction F2, and F3 shown in the figure can be an example of the aforementioned third direction F3. When the aforementioned nozzle 13 is in an idle state, as... Figure 1 As shown, the aforementioned third direction F3 can coincide with the direction of gravity.

[0048] Preferably, such as Figure 1 , Figure 2 and Figure 6 As shown, the spiral spring tube 11, the straight guide tube 12, and the nozzle 13 can be connected as a single unit, which avoids possible leakage problems and ensures the continuity and stability of the pigment during the transmission process.

[0049] Optionally, the aforementioned docking part 14 can be a pipe fitting to ensure the sealing and ease of assembly between the paint outlet pipe 4 and the injection fitting.

[0050] In an embodiment, such as Figure 1 , Figure 6 and Figure 7 As shown, the liquid mixing equipment described above may include a color paste tank 2, and the paint outlet pipe 4 is connected to the color paste tank 2 to pump out the color paste stored in the color paste tank 2. The top of the color paste tank 2 is provided with a grouting port 20. When the grouting structure is in an idle state, that is, the nozzle 13 can extend along a third direction F3, the nozzle 13 can be fixed to the top of the color paste tank 2, and the nozzle 13 can be arranged opposite to the grouting port 20. In this way, on the one hand, there is no need to set up an additional hanger or bracket, thereby saving space and cost; on the other hand, when the nozzle 13 is in an idle state, the color paste dripping from the nozzle 13 can flow directly back into the color paste tank 2 due to gravity, avoiding waste and contamination of the color paste and ensuring the purity and consistency of the color paste.

[0051] Preferably, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the liquid mixing equipment may also include a cover 3, which can be placed over the grouting port 20. In this way, by sealing the grouting port 20 with the cover 3, it is possible to prevent the pigment from polluting the environment due to accidental leakage, and to prevent dust, impurities and other pollutants from entering the pigment tank 2, thus ensuring the purity and quality of the pigment. In addition, it is possible to prevent the pigment from solidifying and drying due to the openness of the pigment tank 2, which would result in waste.

[0052] Preferably, such as Figure 7 As shown, the cover 3 and the pigment tank 2 are detachably connected so that pigment can be added to the pigment tank 2 by removing the cover 3, thereby realizing the recycling of the pigment tank 2.

[0053] Optionally, the cover 3 and the color paste tank 2 can be detachably connected by means of magnetic attraction, snap-fit, screw connection, etc.

[0054] Preferably, such as Figure 1 , Figure 2 , Figure 6 and Figure 7As shown, the cover 3 may include a cover body 32 and a connector 31. The mounting hole may be provided in the connector 31. In other words, the injection fitting is inserted and fixed to the connector 31. On the one hand, the connector 31 is used to fix the nozzle 13 to the color paste port. On the other hand, it facilitates the automated identification and positioning of the injection structure. That is, compared with the robotic arm and other automated equipment directly gripping the soft nozzle 13, fixing the nozzle 13 in the connector 31 not only provides a more stable and reliable gripping point for automated operation, but also facilitates the positioning and capture of the nozzle 13 by automated equipment, improving the accuracy and efficiency of automated operation, while reducing the risk of nozzle 13 damage or operation failure due to unstable gripping.

[0055] Preferably, such as Figure 4 As shown, the side of the above-mentioned plug-in 31 can also be provided with positioning protrusions to improve the clamping stability of automated equipment.

[0056] Preferably, such as Figure 1 , Figure 2 and Figure 6 As shown, the cap body 32 and the connector 31 are detachably connected. This allows for several advantages. First, when the nozzle 13 is in use, only the connector 31 portion of the injection port can be exposed, without completely removing the entire cap body 3. This not only reduces the contact area between the pigment and the external environment, lowering the risk of the pigment hardening and failing due to prolonged exposure, but also maintains most of the sealing of the injection port 20. Second, by fixing the nozzle 13 to the connector 31, rather than the entire cap body 32, the weight of the nozzle 13 is reduced, making the nozzle 13 more flexible and easier to move and operate, reducing the burden and energy consumption during operation, and improving work efficiency.

[0057] Preferably, the cover body 32 and the insertion base 31 can be detachably connected by snap-fit, insertion, or magnetic attraction.

[0058] Optionally, the cover body 32 and the plug-in seat 31 can also be detachably connected to the pigment tank 2.

[0059] Preferably, such as Figure 1 , Figure 2 and Figure 6 As shown, the cover body 32 can be the main part of the cover body 3, responsible for covering and sealing most of the area of ​​the grouting port 20. The plug-in seat 31 can only cover the area of ​​the pigment port that is directly opposite the nozzle 13. In other words, the coverage area of ​​the cover body 32 is larger than the coverage area of ​​the plug-in seat 31, so as to further reduce the area of ​​the pigment tank 2 exposed when the nozzle 13 is in operation.

[0060] However, it is not limited to this; the aforementioned cover 3 is not limited to a separate, detachable structure consisting of the cover body 32 and the connector 31. Figure 6 As shown, the cover body 32 and the plug-in base 31 can also be connected as one unit to ensure the overall sealing of the cover body 3.

[0061] Preferably, such as Figure 3 As shown, the above-mentioned injection fitting may also include a snap-fit ​​part 16, which may be provided on the outer wall of the connection between the above-mentioned straight guide tube 12 and the nozzle 13. The injection fitting is interference-fitted with the above-mentioned mounting hole through the snap-fit ​​part 16 to improve the connection strength between the injection fitting and the above-mentioned plug seat 31, and effectively prevent the injection fitting from falling off or loosening.

[0062] Optionally, such as Figure 3 As shown, the aforementioned snap-fit ​​portion 16 can be integrally connected with the aforementioned injection fitting via an annular protrusion to ensure the snap-fit ​​stability of the injection fitting in the circumferential direction.

[0063] Preferably, such as Figure 5 As shown, the aforementioned mounting hole can be a variable diameter hole, that is, the diameter of the lower end of the mounting hole is smaller than the diameter of the upper end of the mounting hole, so that a limiting boss is formed on the inner wall of the mounting hole.

[0064] Correspondingly, such as Figure 3 and Figure 5 As shown, the outer wall of the nozzle 13 is provided with a limiting part 17. When the nozzle 13 is inserted into the mounting hole from top to bottom to the predetermined position, the limiting part 17 can be abutted by the limiting protrusion to limit the depth of the nozzle 13 inserted into the mounting hole, so as to prevent the nozzle 13 from falling into the pigment tank 2 through the mounting hole due to its own weight.

[0065] Optionally, such as Figure 3 As shown, the limiting part 17 can be a convex ring fixed to the outer surface of the nozzle 13.

[0066] Optionally, such as Figure 5 As shown, the aforementioned limiting part 17 can also be formed by changing the outer diameter of the nozzle 13 (i.e., the upper outer diameter of the nozzle 13 is large and the lower outer diameter is small).

[0067] In an embodiment, preferably, such as Figure 1 , Figure 4 , Figure 6 and Figure 7As shown, the above-mentioned injection structure may further include a guide portion 15, which can be fixed to the cover 3. The liquid outlet portion of the injection tube is fixed to one side of the cover 3 via the guide portion 15, so that the liquid outlet portion can extend along the extension direction of the mounting hole. The liquid outlet portion is the portion of the injection tube that is not inserted into the mounting hole and is closer to the end of the cover 3. In this way, the liquid outlet portion is extended along the extension direction of the mounting hole by the guide portion 15. In other words, the extension direction of the liquid outlet portion can always be consistent with the spray direction of the nozzle 13. On the one hand, this ensures the smoothness of the slurry discharge from the nozzle 13 and the accuracy of the spray angle. On the other hand, the setting of the guide portion 15 improves the connection stability between the injection tube and the plug seat 31, avoids the deviation of the spray direction due to loosening or misalignment, and effectively reduces the probability of damage to the injection tube due to frequent bending at the connection between the injection tube and the cover plate.

[0068] Preferably, such as Figure 4 As shown, the guide portion 15 may include a first guide plate 151, an insertion plate 153, a second guide plate 152, and a fixing plate 154. Both the first guide plate 151 and the second guide plate 152 extend along the extension direction of the mounting hole. The first guide plate 151 and the second guide plate 152 are respectively disposed on both sides of the injection fitting, and are arranged sequentially along the extension direction of the mounting hole. The insertion plate 153 connects the first guide plate 151 and the second guide plate 152, and the insertion plate 153 has an insertion hole that penetrates itself along the extension direction of the mounting hole for the injection fitting to pass through. The fixing plate 154 is connected to the end of the second guide plate 152 away from the insertion plate 153, and the fixing plate 154 is in contact with the surface of the cover 3, so as to restrict the injection tube from bending to both sides of the first direction F1 by the first guide plate 151 and the second guide plate 152, and restrict the injection tube from bending to both sides of the second direction F2 by the side hole walls of the insertion plate 153 in the second direction F2.

[0069] Preferably, such as Figure 4 As shown, the guide portion 15 may also include a clearance portion 155, which is disposed at one end of the first guide plate 151 away from the insertion plate 153, and the clearance portion 155 bends from the first guide plate 151 toward the side away from the first guide plate 151 to blunt the edge of the first guide plate 151 and prevent the first guide plate 151 from cutting the injection tube.

[0070] Preferably, such as Figure 4 As shown, the first guide plate 151, the insertion plate 153, the second guide plate 152, the fixing plate 154, and the clearance part 155 can be an integral structural component formed by bending the sheet metal.

[0071] The second aspect of this application also provides a liquid preparation device, including the dispensing structure described in any of the above embodiments, and thus possesses all the beneficial technical effects of the dispensing structure, which will not be repeated here.

[0072] Preferably, such as Figure 1 , Figure 6 and Figure 7 As shown, the liquid mixing equipment may include a color paste tank 2, and the paint outlet pipe 4 is connected to the color paste tank 2 to pump out the color paste stored in the color paste tank 2.

[0073] Preferably, such as Figure 1 , Figure 6 and Figure 7 As shown, the color paste tank 2 can extend along the third direction F3, and the above-mentioned grouting port 20 can be provided at the upper end of the color paste tank 2 in the third direction F3.

[0074] Optionally, the liquid mixing equipment may include a drive unit, which may be located in the paint outlet pipe 4 to provide power for pumping paint from the colorant tank 2. Optionally, the drive unit may be an electric pump.

[0075] Preferably, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the liquid mixing equipment may also include a cover 3, which can be placed over the grouting port 20.

[0076] Preferably, such as Figure 7 As shown, the cover 3 and the pigment tank 2 are detachably connected so that pigment can be added to the pigment tank 2 by removing the cover 3, thereby realizing the recycling of the pigment tank 2.

[0077] Optionally, the cover 3 and the pigment tank 2 can be detachably connected by means of magnetism, snap-fit, screw connection, etc.

[0078] Preferably, such as Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the cover 3 may include a cover body 32 and a connector 31. The paint outlet tube 4 and the connector 31 may be respectively disposed at both ends of the cover body 32 in the first direction F1 to provide a certain storage space for the spring spiral tube.

[0079] Optionally, such as Figure 6 As shown, the cover body 32 and the plug-in seat 31 can be separate structures that are independent of each other.

[0080] Optionally, such as Figure 7 As shown, the cover body 32 and the plug-in socket 31 can be connected as one unit.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An injection structure, characterized in that, For dispensing pigments in a liquid mixing equipment, the dispensing structure includes a dispensing pipe, at least a portion of which is a helical spring tube. One end of the dispensing pipe is used to connect with the paint outlet pipe of the liquid mixing equipment, and the other end of the dispensing pipe is provided with a nozzle.

2. The injection structure according to claim 1, characterized in that, The injection fitting also includes a straight guide tube, through which the nozzle and the helical spring tube are connected.

3. The injection structure according to claim 2, characterized in that, The spiral spring tube, the linear guide tube, and the nozzle are integrated into a single connecting pipe.

4. The injection structure according to claim 2, characterized in that, The liquid mixing equipment includes a color paste tank, and the paint outlet pipe is connected to the color paste tank to pump out the color paste stored in the color paste tank. The top of the color paste tank is provided with a grouting port. When the injection structure is in an idle state, the nozzle can be fixed to the top of the pigment tank, and the nozzle is arranged opposite to the injection port.

5. The injection structure according to claim 4, characterized in that, The liquid preparation equipment also includes a cover, which is placed over the grouting port; The cover is detachably connected to the color paste tank; The cover is provided with a mounting hole that communicates with the grouting port, and the nozzle is inserted and fixed to the cover through the mounting hole.

6. The injection structure according to claim 5, characterized in that, The cover includes a cover body and a socket, and the mounting hole is disposed in the socket; The cover body and the plug-in socket are connected as one unit; Alternatively, the cover body and the connector can be detachably connected.

7. The injection structure according to claim 5, characterized in that, It also includes a guide portion, which is fixed to the cover body. The liquid outlet portion of the injection tube is fixed to one side of the cover body via the guide portion, so that the liquid outlet portion can extend along the extension direction of the mounting hole. The liquid outlet portion is the portion of the injection tube that is not inserted into the mounting hole and is closer to one end of the cover body.

8. The injection structure according to claim 7, characterized in that, The guide portion includes a first guide plate, an insertion plate, a second guide plate, and a fixing plate. The first guide plate and the second guide plate both extend along the extension direction of the mounting hole. The first guide plate and the second guide plate are respectively disposed on both sides of the injection fitting, and the first guide plate and the second guide plate are arranged sequentially in the extension direction of the mounting hole. The insertion plate connects the first guide plate and the second guide plate, and the insertion plate is provided with an insertion hole that extends through itself along the extension direction of the placement hole, so that the injection fitting can pass through; The fixing plate is connected to the end of the second guide plate away from the insertion plate, and the fixing plate is in contact with the surface of the cover.

9. The injection structure according to claim 8, characterized in that, The guide portion further includes a clearance portion, which is located at one end of the first guide plate away from the socket plate, and the clearance portion bends from the first guide plate toward the side away from the first guide plate.

10. A liquid preparation device, characterized in that, The injection structure includes any one of claims 1 to 9.

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