Quantitative liquid feeding assembly and quantitative liquid feeding system

Abstract

The invention discloses a quantitative liquid feeding assembly and a quantitative liquid feeding system.The quantitative liquid feeding assembly comprises a liquid storage device, a switching device, a liquid pumping device and a liquid conduction device, and the liquid storage device is used for storing liquid; the switching device comprises a base disc, and a first connecting part, a second connecting part, a third connecting part and a fourth connecting part which are communicated and connected with an internal channel of the base disc; the liquid pumping device is connected with the third connecting part and is used for pumping liquid stored in the liquid storage device; the liquid conduction device comprises a liquid outlet nozzle and a liquid outlet pipe, and the liquid outlet pipe is communicated with the liquid outlet nozzle and the fourth connecting part of the switching device. The quantitative liquid feeding system comprises a supporting device, a quantitative liquid feeding assembly and a driving device. A quantitative liquid feeding assembly in the quantitative liquid feeding system adopts the design of multiple one-way valves, the unidirectivity and stability of liquid flowing are ensured, and high-precision quantitative control is achieved. No matter the liquid is extracted or discharged, the liquid amount can be accurately controlled, and the strict requirement of customized beauty cosmetics for the component proportion is met.

Description

Technical Field

[0001] The invention belongs to the technical field of quantitative liquid feeding equipment, and in particular relates to a quantitative liquid feeding component and a quantitative liquid feeding system. Background Art

[0002] With the continuous improvement of people's living standards and the increase of personalized needs, customized beauty products are gaining more and more attention and popularity in the market. Customized beauty products include perfume, shower gel, shampoo, etc. These products can not only meet the personalized needs of consumers, but also improve the user experience and satisfaction. Market research shows that consumers have a strong demand for the personalization and customization of beauty products, especially personalized choices in fragrance, ingredients, packaging, etc., which have become an important factor in attracting consumers.

[0003] However, the development of customized beauty products in the market still faces many challenges, one of the most important of which is the lack of efficient and accurate quantitative liquid dispensing equipment. Quantitative liquid dispensing equipment plays a key role in the production process of customized beauty products, and its performance directly affects the quality of the product and the user experience.

[0004] Existing quantitative liquid dosing equipment is mostly used in industrial production, and is mainly suitable for large-scale, standardized production modes. These devices often seem to be unable to cope with small-batch, diversified customized production. Specifically, the existing equipment has the following problems: Insufficient precision: Customized beauty products have strict requirements on the ratio of ingredients, and any slight deviation may affect the effect and quality of the final product. However, many existing devices have low accuracy in quantitative liquid dosing and are difficult to meet the requirements of customized production. Complex operation: The current quantitative liquid dosing equipment has a cumbersome operating process, and it is difficult to quickly adjust the formula and production parameters, and cannot adapt to the flexible needs of personalized production. Summary of the invention

[0005] The purpose of the present invention is to provide a quantitative liquid feeding component and a quantitative liquid feeding system to overcome the deficiencies in the prior art, meet the actual needs of customized beauty and cosmetics production, and promote the development of the beauty and cosmetics industry towards personalization.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: a quantitative liquid feeding component, comprising:

[0007] A liquid storage device, wherein the liquid storage device is used to store liquid;

[0008] An adapter device, the adapter device includes a base, a first connection part, a second connection part, a third connection part and a fourth connection part which are conductively connected to an internal channel of the base, a first one-way valve is installed in the second connection part, a second one-way valve is installed in the third connection part, and a third one-way valve is installed in the fourth connection part; the first connection part is connected to the liquid storage device; the first connection part is provided with a first connection port, the second connection part is provided with a second connection port, the third connection part is provided with a third connection port, and the fourth connection part is provided with a fourth connection port; a conducting direction of the first one-way valve is from the outside to the inside of the first connection port, a conducting direction of the second one-way valve is from the inside to the outside of the second connection port, and a conducting direction of the third one-way valve is from the inside to the outside of the fourth connection port;

[0009] a liquid pumping device, the liquid pumping device being connected to the third connecting portion and being used to pump out the liquid stored in the liquid storage device;

[0010] A liquid conduction device, wherein the liquid conduction device comprises a liquid outlet nozzle and a liquid outlet pipe, wherein the liquid outlet pipe is connected with the liquid outlet nozzle and the fourth connecting portion of the adapter device.

[0011] The quantitative liquid feeding assembly of the present invention as described above, further, the liquid conduction device also includes a liquid outlet nozzle mounting seat and a fourth one-way valve, the fourth one-way valve is installed in the liquid outlet nozzle mounting seat, the liquid outlet nozzle is installed at the liquid outlet of the liquid outlet nozzle mounting seat, and one end of the liquid outlet tube is connected to the liquid inlet of the liquid outlet nozzle mounting seat.

[0012] The quantitative liquid feeding assembly of the present invention as described above, further, the liquid storage device includes a liquid bottle, a liquid bottle mounting seat and a liquid inlet pipe, the liquid bottle is installed in the liquid bottle mounting seat, the liquid bottle mounting seat is installed on the first connecting port of the adapter device, the upper end of the liquid inlet pipe is connected to the base plate of the adapter device, and the liquid inlet pipe is connected to the third connecting port and the fourth connecting port through the internal channel of the base plate.

[0013] The quantitative liquid feeding assembly of the present invention as described above, further, the third connecting portion of the adapter device is also provided with a fifth connecting port, the fifth connecting port is respectively connected to the third connecting port and the fourth connecting port, and a blocking cover is installed in the fifth connecting port.

[0014] The quantitative liquid feeding assembly of the present invention as described above, further, the liquid pumping device includes a syringe and a liquid pumping rod, a piston is installed at one end of the liquid pumping rod, the piston is arranged in the syringe, and the liquid inlet of the syringe is connected to the third connecting port of the adapter device.

[0015] The present invention also provides a quantitative liquid feeding system, which includes a supporting device, a quantitative liquid feeding component and a driving device; the quantitative liquid feeding component is a quantitative liquid feeding component as described in any one of the above items; the quantitative liquid feeding component is installed on the supporting device, the driving device is installed on the supporting device, and the driving device drives the liquid pumping device of the quantitative liquid feeding component to operate.

[0016] The quantitative liquid feeding system of the present invention as described above, further, the supporting device includes a first supporting side plate, a second supporting side plate and a mounting base, the first supporting side plate and the second supporting side plate are vertically connected to the mounting base; the adapter device is installed on the mounting base; the second supporting side plate is fixedly connected to the supporting plate, and a first holding piece is provided at the upper end of the syringe, and the first holding piece is fixed to the supporting plate by a first pressing plate.

[0017] The quantitative liquid feeding system of the present invention as described above, further, the driving device includes a driving motor, a screw and a moving seat, the motor is connected to the screw, the moving seat is arranged on the screw, the moving seat is driven to move by the rotation of the screw, and the moving seat is connected to the liquid extraction rod of the liquid extraction device.

[0018] The quantitative liquid feeding system of the present invention as described above, further, the movable seat is connected with a clamping block, the clamping block is connected to the L-shaped adapter plate, the upper end of the pumping rod of the pumping device is provided with a second holding piece, and the second holding piece is fixed to the L-shaped adapter plate by a second pressure plate.

[0019] The quantitative liquid feeding system of the present invention as described above, further, the movable seat is connected to the first guide seat, the first support side plate is equipped with a first guide rail, and the first guide seat is connected to the first guide rail; the L-shaped adapter plate is equipped with a second guide seat, the second support side plate is equipped with a second guide rail, and the second guide seat is connected to the second guide rail.

[0020] The operation process of the quantitative liquid feeding component of the present invention is as follows: the liquid pumping device sucks liquid (or draws liquid), and the liquid flows from the liquid bottle, the liquid inlet pipe and flows through the second one-way valve into the syringe; when the liquid pumping device discharges liquid, the liquid in the syringe enters the liquid outlet pipe of the liquid conduction device through the third one-way valve and flows out from the liquid outlet nozzle. Since the liquid pumping and liquid discharge amplitudes of the liquid pumping device can be quantitatively controlled, the liquid flowing out of the liquid outlet nozzle can also achieve accurate quantitative liquid feeding. In order to avoid the air pressure in the liquid bottle being lower than the external air pressure after multiple liquid pumping, the liquid pumping device cannot pump liquid or the accuracy of the pumped liquid amount is greater than the allowable error, a first one-way valve is set. When the air pressure inside the liquid bottle is lower than the external atmospheric pressure and the air pressure difference can open the first one-way valve, the external gas enters the bottle body to balance the internal and external air pressure difference, so that the liquid in the liquid bottle is smoothly pumped out. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or other advantages of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings, which are only exemplary and do not limit the present invention, wherein:

[0022] Figure 1 A schematic diagram of a quantitative liquid feeding system according to an embodiment of the present invention;

[0023] Figure 2 A schematic cross-sectional view of a quantitative liquid feeding assembly according to an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of a switching device according to an embodiment of the present invention;

[0025] Figure 4 A schematic cross-sectional view of a switching device according to an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the upper part of a quantitative liquid feeding system according to an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of the upper part of a quantitative liquid feeding system according to an embodiment of the present invention;

[0028] Figure 7 A partial schematic diagram of a driving device according to an embodiment of the present invention;

[0029] Figure 8 A partial schematic diagram of a driving device according to an embodiment of the present invention.

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] 10. Support device, 11. First support side plate, 12. Second support side plate, 13. Mounting base, 14. First guide rail, 15. Second guide rail, 16. Support plate, 17. First pressure plate, 18. First position detection device, 19. Second position detection device, 20. Liquid storage device, 21. Liquid bottle, 22. Liquid bottle mounting seat, 23. First sealing gasket, 24. Second sealing gasket, 25. Liquid inlet pipe, 30. Adapter, 31. Base plate, 32. First connecting part, 33. Second connecting part, 34. Third connecting part, 35. Fourth connecting part, 36. First one-way valve, 37. Second one-way valve, 38. Third one-way valve, 39. Blocking cover, 321, first connection port, 331, second connection port, 341, third connection port, 351, fourth connection port, 391, fifth connection port, 40, liquid extraction device, 41, syringe, 42, liquid extraction rod, 43, first holding piece, 44, second holding piece, 50, driving device, 51, driving motor, 52, lead screw, 53, movable seat, 54, L-shaped adapter plate, 55, first guide seat, 56, second guide seat, 57, second pressure plate, 58, cover plate, 59, clamping block, 60, liquid conduction device, 61, liquid outlet nozzle mounting seat, 62, liquid outlet nozzle, 63, fourth one-way valve, 64, connecting elbow, 65, liquid outlet pipe. DETAILED DESCRIPTION

[0032] Hereinafter, embodiments of a dosing assembly and a dosing system of the present invention will be described with reference to the accompanying drawings.

[0033] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are illustrative and exemplary, and should not be construed as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0034] The drawings of this specification are schematic diagrams, which assist in explaining the concept of the present invention and schematically show the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structures of various components of the embodiments of the present invention, the drawings are not drawn according to the same scale. The same reference numerals are used to represent the same parts.

[0035] In view of the problems raised in the background technology, a high-precision quantitative liquid dispensing device suitable for the production of customized beauty products is urgently needed to improve production efficiency, reduce production costs, and enhance product quality and user experience. Such a device should have high-precision quantitative control, simple operation process, low maintenance cost and good compatibility with various liquids, so as to better meet the market demand for customized beauty products.

[0036] Combination Figures 1 to 8 The specific implementation and examples of the quantitative liquid feeding component and the quantitative liquid feeding system of the present invention are described respectively. In one embodiment, the quantitative liquid feeding component includes:

[0037] The liquid storage device 20 is used to store liquid; the liquid can be perfume raw materials, cosmetic raw materials, toiletries raw materials, or beverage raw materials for drinking, such as juice raw materials. For specific raw materials such as perfume, the liquid storage device is required to be made of glass or stainless steel, or other materials that will not chemically react with the liquid to be contained. Figure 2 In a preferred embodiment shown, the liquid storage device includes a liquid bottle 21, a liquid bottle mounting seat 22 and a liquid inlet pipe 25. The liquid bottle 21 is mounted in the liquid bottle mounting seat 22. The liquid bottle mounting seat 22 is mounted on the first connection port 321 of the adapter 30. The upper end of the liquid inlet pipe 25 is connected to the base plate 31 of the adapter 30. The liquid inlet pipe 25 communicates with the third connection port 341 and the fourth connection port 351 through the internal channel of the base plate 31. Since the adapter is mounted on the mounting base 13, that is, an opening is set on the mounting base, the adapter is inserted into the above opening, and the liquid bottle mounting seat and the adapter are connected by the threaded structure or the clamping structure set at the first connection port position, which can not only realize the installation and fixation of the adapter, but also facilitate operation. In order to realize the self-sealing of the liquid storage device and the sealing of the connection part with the adapter, a first sealing gasket 23 is set between the upper opening of the liquid bottle and the liquid bottle mounting seat, and a second sealing gasket 24 is set at the connection part between the liquid bottle mounting seat 22 and the adapter 30. The above sealing gasket can be a rubber or silicone sealing gasket. Of course, sealing can also be achieved by applying sealant to the above-mentioned connecting parts instead of using a sealing gasket.

[0038] The switching device 30, such as Figure 2 , Figure 3 and Figure 4As shown, the adapter device 30 includes a base plate 31, a first connecting portion 32, a second connecting portion 33, a third connecting portion 34 and a fourth connecting portion 35 which are connected to the internal channel of the base plate 31, a first one-way valve 36 is installed in the second connecting portion 33, a second one-way valve 37 is installed in the third connecting portion 34, and a third one-way valve 38 is installed in the fourth connecting portion 35; the first connecting portion 32 is connected to the liquid storage device 20; the first connecting portion 32 is provided with a first connecting port 321, and the second connecting portion 33 is provided with a second connecting port 331 , the third connection part 34 is provided with a third connection port 341, and the fourth connection part 35 is provided with a fourth connection port 351; the conduction direction of the first one-way valve 36 is from the outside to the inside of the first connection port 321, the conduction direction of the second one-way valve 37 is from the inside to the outside of the second connection port 331, and the conduction direction of the third one-way valve 38 is from the inside to the outside of the fourth connection port 351; the conduction direction of the one-way valves mentioned above in the present invention refers to the liquid or other things that can flow along the conduction direction, while the direction opposite to the conduction direction prohibits the liquid or gas from flowing. The conduction direction of the first one-way valve 36 is from the outside to the inside of the first connection port 321. When the air pressure inside the liquid bottle is lower than the external atmospheric pressure and the air pressure difference can open the first one-way valve, the external gas enters the bottle body to balance the air pressure difference between the inside and the outside. The conduction direction of the second one-way valve 37 is from the inside to the outside of the second connection port 331. When the pumping device pumps liquid, the liquid flows from the bottle to the liquid inlet pipe, and then flows to the second one-way valve through the liquid inlet pipe. Due to the action of the pumping device, the pressure of the second one-way valve toward one end of the second connection port is less than the pressure on the other side, so that the liquid flows from the second one-way valve to the pumping device. The conduction direction of the third one-way valve 38 is from the inside to the outside of the fourth connection port 351; when the pumping device pumps liquid, the third one-way valve is in a closed state. When the pumping device pushes out liquid, since the second one-way valve can only be conducted in one direction, the liquid opens the third one-way valve and flows into the liquid conduction device.

[0039] The pumping device 40 is connected to the third connecting portion 34 and is used to extract the liquid stored in the liquid storage device 20; Figure 5 In a specific embodiment shown, the liquid extraction device 40 includes a syringe 41 and a liquid extraction rod 42. A piston is installed at one end of the liquid extraction rod 42, and the piston is arranged in the syringe 41. The liquid inlet of the syringe 41 is connected to the third connection port 341 of the adapter 30. The syringe can be a syringe made of plastic material, preferably a syringe made of glass or stainless steel.

[0040] The liquid conducting device 60 includes a liquid outlet nozzle 62 and a liquid outlet pipe 65 . The liquid outlet pipe 65 connects the liquid outlet nozzle 62 and the fourth connecting portion 35 of the adapter device 30 .

[0041] The operation process of the quantitative liquid feeding component of the present invention is as follows: the liquid pumping device sucks liquid (or draws liquid), and the liquid flows from the liquid bottle, the liquid inlet pipe and flows through the second one-way valve into the syringe; when the liquid pumping device discharges liquid, the liquid in the syringe enters the liquid outlet pipe of the liquid conduction device through the third one-way valve and flows out from the liquid outlet nozzle. Since the liquid pumping and liquid discharge amplitudes of the liquid pumping device can be quantitatively controlled, the liquid flowing out of the liquid outlet nozzle can also achieve accurate quantitative liquid feeding. In order to avoid the air pressure in the liquid bottle being lower than the external air pressure after multiple liquid pumping, the liquid pumping device cannot pump liquid or the accuracy of the pumped liquid amount is greater than the allowable error, a first one-way valve is set. When the air pressure inside the liquid bottle is lower than the external atmospheric pressure and the air pressure difference can open the first one-way valve, the external gas enters the bottle body to balance the internal and external air pressure difference, so that the liquid in the liquid bottle can be smoothly pumped out.

[0042] When the quantitative liquid dosing assembly of the above embodiment is used, the inventors found that the liquid dripping problem may occur at the liquid outlet position, resulting in bubbles or air columns inside the liquid outlet device, thereby affecting the accuracy of subsequent liquid outlet (the mixing of bubbles or air columns makes the liquid outlet less than the expected liquid outlet). The inventors further improved the above embodiment and combined Figure 2 In the quantitative liquid feeding assembly shown, the liquid conducting device 60 further includes a liquid outlet nozzle mounting seat 61 and a fourth one-way valve 63. The fourth one-way valve 63 is mounted in the liquid outlet nozzle mounting seat 61. The liquid outlet nozzle 62 is mounted at the liquid outlet of the liquid outlet nozzle mounting seat 61. One end of the liquid outlet pipe 65 is connected to the liquid inlet of the liquid outlet nozzle mounting seat 61 through a connecting elbow 64. The conduction direction of the fourth one-way valve is from the liquid outlet pipe to the liquid outlet nozzle. Due to the setting of the fourth one-way valve, when the liquid pumping device does not discharge or discharge liquid, the liquid in the liquid outlet pipe of the liquid storage device is blocked by the fourth one-way valve and will not flow out of the liquid outlet nozzle, thereby avoiding the problem of dripping at the liquid outlet nozzle position and improving the accuracy of liquid discharge.

[0043] exist Figure 2 In the quantitative liquid feeding assembly shown, the third connecting portion 34 of the adapter 30 is further provided with a fifth connecting port 391, and the fifth connecting port 391 is respectively connected to the third connecting port 341 and the fourth connecting port 351. A plugging cover 39 is installed in the fifth connecting port 391. The position of the fifth connecting port is opposite to the installation position of the third one-way valve. By opening the plugging cover, the third one-way valve can be easily pushed out using a tool, which facilitates the disassembly of the third one-way valve.

[0044] The embodiment of the present invention also provides a quantitative liquid feeding system, such as Figures 5 to 8 As shown, it includes a support device 10, a quantitative liquid feeding component and a driving device 50; the quantitative liquid feeding component is any of the quantitative liquid feeding components in the above embodiments; the quantitative liquid feeding component is installed on the support device 10, the driving device 50 is installed on the support device 10, and the driving device 50 drives the liquid pumping device 40 of the quantitative liquid feeding component to operate. Figure 5 and Figure 6As shown, the support device 10 includes a first support side plate 11, a second support side plate 12 and a mounting base 13, the first support side plate 11 and the second support side plate 12 are vertically connected to the mounting base 13; the adapter device 30 is installed on the mounting base 13; Figure 8 As shown, the second supporting side plate 12 is fixedly connected to the supporting plate 16, and the upper end of the syringe 41 is provided with a first holding member 43, and the first holding member 43 is fixed to the supporting plate 16 by the first pressing plate 17. The driving device 50 includes a driving motor 51, a screw 52 and a moving seat 53, the motor is connected to the screw 52, ​​and the moving seat 53 is arranged on the screw 52, ​​and the moving seat 53 is driven to move by the rotation of the screw 52, ​​and the moving seat 53 is connected to the liquid extraction rod 42 of the liquid extraction device 40. Specifically, in combination with Figure 7 As shown, the movable seat 53 is connected to a clamping block 59, which is connected to the L-shaped adapter plate 54. The upper end of the liquid extraction rod 42 of the liquid extraction device 40 is provided with a second holding member 44, and the second holding member 44 is fixed to the L-shaped adapter plate by a second pressing plate 57. Through the above arrangement, when the driving motor is running, it drives the screw to rotate, thereby driving the movable seat installed on the screw to move, and then the syringe is fixed, while the liquid extraction rod reciprocates and moves linearly relative to the syringe, realizing liquid extraction and discharge, and continuously pumping the liquid from the liquid bottle to the liquid outlet in a quantitative manner.

[0045] In a further preferred embodiment of the quantitative liquid feeding system, the moving seat 53 is connected to the first guide seat 55, the first support side plate 11 is provided with the first guide rail 14, and the first guide seat 55 is connected to the first guide rail 14; the L-shaped adapter plate 54 is provided with the second guide seat 56, the second support side plate 12 is provided with the second guide rail 15, and the second guide seat 56 is connected to the second guide rail 15. By providing a pair of guide seats and guide rails, the moving seat and the L-shaped adapter plate can be moved along a desired linear direction, and the moving process remains stable.

[0046] exist Figure 6 In a preferred embodiment of a quantitative liquid feeding system shown in the figure, a first position detection device 18 and a second position detection device 19 are fixed on the second supporting side plate 12 at intervals, and a shielding piece 58 is fixed on the movable seat 53. The above-mentioned position detection device is a photoelectric sensing switch. When the shielding piece passes through the photoelectric sensing switch and blocks it, the photoelectric sensing switch generates a trigger signal, thereby realizing the detection of the moving position of the movable seat, and then the motor control device can control the operating state of the driving motor through the signal to realize the quantitative discharge of liquid.

[0047] In summary, the quantitative liquid feeding system of the present invention has the following advantages:

[0048] 1. High-precision quantitative control: The quantitative liquid feeding component of the present invention adopts a multiple one-way valve design to ensure the unidirectionality and stability of liquid flow, thereby achieving high-precision quantitative control. Whether extracting or discharging liquid, the amount of liquid can be accurately controlled to meet the strict requirements of customized beauty products on the proportion of ingredients.

[0049] 2. Easy operation: The quantitative liquid feeding component and system designed by the present invention are easy to operate, and can quickly adjust the formula and production parameters to meet the flexible needs of personalized production. The modular design of the components makes each part easy to disassemble and clean, further improving the convenience of operation.

[0050] 3. Compatibility with various liquids: The present invention is applicable to various types of liquids, including raw materials of cosmetics such as perfume, shower gel, shampoo, etc. The component materials are made of corrosion-resistant glass, stainless steel or other materials with high chemical stability to ensure compatibility with different liquids and avoid chemical reactions and contamination.

[0051] 4. Avoid dripping and bubble problems: A fourth one-way valve is provided in the present invention to effectively prevent dripping from the liquid outlet and avoid the appearance of bubbles or air columns inside the system, thereby ensuring the accuracy and stability of the liquid outlet and improving the user experience.

[0052] 5. Balance the air pressure difference: Through the design of the first one-way valve, when the air pressure inside the liquid bottle is lower than the external atmospheric pressure, the external gas can enter the bottle to balance the air pressure difference inside and outside, ensuring that the liquid can be pumped out smoothly and avoiding the influence of air pressure difference on the pumping efficiency.

[0053] The technical features disclosed above are not limited to the disclosed combinations with other features. Those skilled in the art may also make other combinations between the technical features according to the purpose of the invention to achieve the purpose of the invention.

Claims

1. A quantitative liquid feeding component, characterized in that: include: A liquid storage device (20), a transfer device (30), a liquid pumping device (40) and a liquid conducting device (60); the liquid storage device (20) is used to store liquid; the transfer device (30) comprises a base plate (31), a first connecting portion (32), a second connecting portion (33), a third connecting portion (34) and a fourth connecting portion (35) which are conductively connected to an internal channel of the base plate (31); a first one-way valve (36) is installed in the second connecting portion (33), a second one-way valve (37) is installed in the third connecting portion (34), and a third one-way valve (38) is installed in the fourth connecting portion (35); the first connecting portion (32) is connected to the liquid storage device (20); the first connecting portion (32) is provided with a first connecting port (321), and the second connecting portion (33) is provided with a second connecting port (331) ), the third connection part (34) is provided with a third connection port (341), and the fourth connection part (35) is provided with a fourth connection port (351); the conduction direction of the first one-way valve (36) is from the outside to the inside of the first connection port (321), the conduction direction of the second one-way valve (37) is from the inside to the outside of the second connection port (331), and the conduction direction of the third one-way valve (38) is from the inside to the outside of the fourth connection port (351); the liquid pumping device (40) is connected to the third connection part (34), and the liquid pumping device (40) is used to pump out the liquid stored in the liquid storage device (20); the liquid conduction device (60) includes a liquid outlet nozzle (62) and a liquid outlet pipe (65), and the liquid outlet pipe (65) connects the liquid outlet nozzle (62) and the fourth connection part (35) of the adapter device (30).

2. The quantitative liquid feeding assembly according to claim 1, characterized in that: The liquid conduction device (60) further comprises a liquid outlet nozzle mounting seat (61) and a fourth one-way valve (63), wherein the fourth one-way valve is mounted in the liquid outlet nozzle mounting seat (61), the liquid outlet nozzle (62) is mounted at the liquid outlet of the liquid outlet nozzle mounting seat (61), and one end of the liquid outlet pipe (65) is connected to the liquid inlet of the liquid outlet nozzle mounting seat (61).

3. The quantitative liquid feeding assembly according to claim 1, characterized in that: The liquid storage device comprises a liquid bottle (21), a liquid bottle mounting seat (22) and a liquid inlet pipe (25); the liquid bottle (21) is mounted in the liquid bottle mounting seat (22); the liquid bottle mounting seat (22) is mounted on a first connection port (321) of the adapter device (30); the upper end of the liquid inlet pipe (25) is connected to a base plate (31) of the adapter device (30); and the liquid inlet pipe (25) is connected to a third connection port (341) and a fourth connection port (351) through an internal channel of the base plate (31).

4. The quantitative liquid feeding assembly according to claim 3 is characterized in that the third connecting portion (34) of the adapter device (30) is also provided with a fifth connecting port (391), and the fifth connecting port (391) is respectively connected to the third connecting port (341) and the fourth connecting port (351), and a blocking cover (39) is installed in the fifth connecting port (391).

5. The quantitative liquid feeding assembly according to claim 1, characterized in that: The liquid pumping device (40) comprises a syringe (41) and a liquid pumping rod (42). A piston is installed at one end of the liquid pumping rod (42). The piston is arranged in the syringe (41). The liquid inlet of the syringe (41) is connected to the third connecting port (341) of the adapter device (30).

6. A quantitative liquid feeding system, characterized in that: It comprises a supporting device (10), a quantitative liquid feeding component and a driving device (50); the quantitative liquid feeding component is the quantitative liquid feeding component according to any one of claims 1 to 5; the quantitative liquid feeding component is mounted on the supporting device (10), the driving device (50) is mounted on the supporting device (10), and the driving device (50) drives the liquid pumping device (40) of the quantitative liquid feeding component to operate.

7. The quantitative liquid feeding system according to claim 6, characterized in that: The supporting device (10) comprises a first supporting side plate (11), a second supporting side plate (12) and a mounting base (13); the first supporting side plate (11) and the second supporting side plate (12) are vertically connected to the mounting base (13); the adapter device (30) is mounted on the mounting base (13); the second supporting side plate (12) is fixedly connected to a supporting plate (16); a first holding piece (43) is provided at the upper end of the syringe (41), and the first holding piece (43) is fixed to the supporting plate (16) by a first pressing plate (17).

8. The quantitative liquid feeding system according to claim 6 or 7, characterized in that: The driving device (50) comprises a driving motor (51), a lead screw (52) and a moving seat (53); the motor is connected to the lead screw (52); the moving seat (53) is arranged on the lead screw (52); the moving seat (53) is driven to move by the rotation of the lead screw (52); and the moving seat (53) is connected to the liquid pumping rod (42) of the liquid pumping device (40).

9. The quantitative liquid feeding system according to claim 8, characterized in that: The movable seat (53) is connected to a clamping block (59), and the clamping block (59) is connected to an L-shaped adapter plate (54). A second holding member (44) is provided at the upper end of a liquid pumping rod (42) of the liquid pumping device (40), and the second holding member (44) is fixed to the L-shaped adapter plate via a second pressing plate (57).

10. The quantitative liquid feeding system according to claim 9, characterized in that: The movable seat (53) is connected to the first guide seat (55), the first support side plate (11) is provided with a first guide rail (14), and the first guide seat (55) is connected to the first guide rail (14); the L-shaped adapter plate (54) is provided with a second guide seat (56), the second support side plate (12) is provided with a second guide rail (15), and the second guide seat (56) is connected to the second guide rail (15).

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