Liquid metering discharge device
By designing a liquid quantitative discharge device and using discharge pipes and valves with different inner diameters for control, the problem of discharge deviation in liquid quantitative discharge devices was solved, achieving precise control of the target discharge amount and improving the accuracy and efficiency of discharge.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 领航食品(肇庆)有限公司
- Filing Date
- 2025-09-22
- Publication Date
- 2026-07-31
AI Technical Summary
Existing liquid material quantitative discharge devices have deviations in discharge volume when using a thin discharge pipe, making it impossible to accurately control the target discharge volume.
Design a liquid quantitative discharge device, including a material cylinder, a buffer cylinder, first, second and third discharge pipes, and corresponding valve configuration. By controlling the opening and closing of the valves, the device achieves the switching between coarse and fine discharge using discharge pipes with different inner diameters, ensuring that the liquid level in the buffer cylinder is consistent, thereby controlling the discharge pressure and flow rate to be consistent.
It achieves more accurate target output within the same output time, reduces output deviation, and improves output accuracy and efficiency.
Smart Images
Figure CN224577239U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of liquid quantitative output technology, and more specifically, to a liquid quantitative output device. Background Technology
[0002] The liquid quantitative discharge device provided by the relevant technology is usually equipped with two discharge pipes, one coarse and one fine. When discharging, the coarse discharge pipe is used first. When the discharge amount is close to the target value (for example, reaching 99% of the target value), the device is switched to the fine discharge pipe to supplement the remaining discharge amount and reach the target discharge amount.
[0003] However, when the liquid quantitative discharge device provided by the relevant technology uses a thin discharge pipe to discharge material, the discharge volume will still have a certain deviation each time, even when the thin discharge pipe is opened for the same discharge time. Utility Model Content
[0004] The purpose of this invention is to provide a liquid quantitative discharge device that can more accurately achieve the target discharge amount, thereby improving the problem of discharge amount deviation.
[0005] The embodiments of this utility model can be implemented as follows: This utility model provides a liquid quantitative dispensing device, comprising: Material cylinder; Buffer jar; The first discharge pipe is connected between the material cylinder and the buffer cylinder, and is used to allow the liquid material in the material cylinder to flow into the buffer cylinder. The second discharge pipe is connected to the buffer tank and is used to output the liquid material in the buffer tank; The third discharge pipe is connected to the material cylinder or buffer cylinder so that the liquid material in the material cylinder can be directly discharged through the third discharge pipe or flow through the buffer cylinder and then be discharged through the third discharge pipe. The first valve is located on the second discharge pipe to control the opening and closing of the second discharge pipe; The second valve, located in the third discharge pipe, controls the opening and closing of the third discharge pipe; wherein, The inner diameter of the second discharge pipe is smaller than that of the third discharge pipe, and the first valve is configured to open when the buffer tank is full and the second valve is closed, so that liquid material is discharged from the second discharge pipe; the second valve is configured to open when the first valve is closed.
[0006] In an optional embodiment, the liquid dispensing device further includes a third valve, which is disposed on the first dispensing pipe and is used to control the opening and closing of the first dispensing pipe.
[0007] In an optional embodiment, the end of the second discharge pipe that is not connected to the buffer cylinder is connected to the third discharge pipe, and the connection between the second discharge pipe and the third discharge pipe is located downstream of the second valve along the direction of conveying liquid material through the third discharge pipe.
[0008] In an optional embodiment, the third discharge pipe is connected to the buffer cylinder so that the liquid material in the material cylinder flows through the buffer cylinder and is output through the third discharge pipe. The inner diameter of the first discharge pipe is larger than the inner diameter of the third discharge pipe so that the flow rate of liquid material delivered to the buffer cylinder through the first discharge pipe is greater than the flow rate of liquid material input from the buffer cylinder into the third discharge pipe.
[0009] In an optional embodiment, the liquid discharging device further includes an air inlet valve, which is located in the buffer cylinder.
[0010] In an optional embodiment, the liquid dispensing device further includes a support with through holes. The material cylinder includes a cylinder body and an outer edge plate. The first discharge pipe is connected to the cylinder body, and the outer edge plate is connected to the outer periphery of the cylinder body. The cylinder body is inserted into the through hole, and the outer edge plate overlaps with the bracket to prevent the cylinder body from slipping out of the through hole.
[0011] In an optional embodiment, the liquid dispensing device further includes a weighing module, which is disposed between the outer edge plate and the support, and is used to weigh the material cylinder and the liquid in the material cylinder.
[0012] In an optional embodiment, the cylinder body includes a cylinder body and a conical portion, the conical portion having a flared end and a constricted end, the flared end being connected to the cylinder body, the first discharge pipe being connected to the constricted end or to the conical surface between the flared end and the constricted end; and an outer edge plate being connected to the cylinder body.
[0013] In an optional embodiment, a feed inlet is provided at the top of the material cylinder; and / or, The top of the material cylinder is equipped with an exhaust port.
[0014] The beneficial effects of the liquid quantitative discharging device provided in this embodiment of the utility model include: when discharging, the device can open the second valve while closing the first valve to output the liquid in the material cylinder using the third discharge pipe until the amount of liquid output from the third discharge pipe is close to the target amount; then, when the buffer cylinder is full of liquid and the second valve is closed, the first valve is opened to output the liquid from the buffer cylinder using the second discharge pipe with a smaller inner diameter; in this way, each time the final fine discharging is achieved using the second discharge pipe with a smaller inner diameter, the liquid level in the buffer cylinder is the same, which helps to ensure that the discharging pressure and flow rate are the same each time the fine discharging is achieved using the second discharge pipe. This allows for more accurate discharging while maintaining the same discharging time in the second discharge pipe, effectively improving the problem of deviation in the discharging amount. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the liquid quantitative discharge device in an embodiment of the present invention; Figure 2 This is a schematic diagram of the liquid quantitative discharge device in other embodiments of the present invention; Figure 3 This is a flowchart of the liquid material quantitative discharge method in the embodiments of this utility model.
[0017] Icons: 010-Liquid material quantitative discharge device; 100-Material cylinder; 110-Cylinder body; 111-Cylinder body; 112-Conical part; 113-Inlet; 114-Exhaust port; 120-Outer edge plate; 200-Buffer cylinder; 210-Air inlet valve; 310-First discharge pipe; 320-Second discharge pipe; 330-Third discharge pipe; 341-First valve; 342-Second valve; 343-Third valve; 400-Bracket; 410-Support plate; 411-Through hole; 420-Support leg; 500-Weighing module. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0021] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.
[0022] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0023] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0024] In the liquid dispensing devices provided by related technologies, two dispensing pipes, one thick and one thin, are typically connected to the material cylinder. During dispensing, the thicker pipe is used first, and when the dispensing volume approaches the target value (e.g., reaching 99% of the target value), the thinner pipe is switched on. However, the inventors discovered that when using the thinner pipe for final fine dispensing, the dispensing speed varies due to differences in the liquid level and dispensing pressure within the material cylinder. Even with the thinner pipe operating for the same amount of time, the final dispensing volume will differ. In other words, even when the same amount of liquid needs to be output, there is still a certain deviation in the quantitative dispensing each time.
[0025] To improve the above issues, please refer to Figure 1This embodiment provides a liquid quantitative discharge device 010, which includes: a material cylinder 100, a buffer cylinder 200, a first discharge pipe 310, a second discharge pipe 320, a third discharge pipe 330, a first valve 341, and a second valve 342; the first discharge pipe 310 is connected between the material cylinder 100 and the buffer cylinder 200, and is used to allow the liquid in the material cylinder 100 to flow into the buffer cylinder 200; the second discharge pipe 320 is connected to the buffer cylinder 200, and is used to output the liquid in the buffer cylinder 200; the third discharge pipe 330 is connected to the material cylinder 100, so that the liquid in the material cylinder 100 passes through the third discharge pipe 341. 30 direct output; a first valve 341 is disposed on the second discharge pipe 320 to control the opening and closing of the second discharge pipe 320; a second valve 342 is disposed on the third discharge pipe 330 to control the opening and closing of the third discharge pipe 330; wherein, the inner diameter of the second discharge pipe 320 is smaller than the inner diameter of the third discharge pipe 330, that is, the second discharge pipe 320 is thinner than the third discharge pipe 330, and the first valve 341 is configured to open when the buffer tank 200 is full and the second valve 342 is closed, so that the liquid material is output from the second discharge pipe 320; the second valve 342 is configured to open when the first valve 341 is closed.
[0026] When discharging liquid, the liquid discharging device 010 can open the second valve 342 while closing the first valve 341, so that the liquid in the material cylinder 100 can be output through the third discharge pipe 330 until the amount of liquid output through the third discharge pipe 330 is close to the target amount (e.g., reaching 99% of the target amount). Then, when the buffer cylinder 200 is full of liquid and the second valve 342 is closed, the first valve 341 is opened, so that the liquid can be output from the buffer cylinder 200 through the second discharge pipe 320 with a smaller inner diameter. In this way, the liquid level in the buffer cylinder 200 is the same each time the final fine discharge is achieved using the second discharge pipe 320 with a smaller inner diameter. This helps to ensure that the discharge pressure and flow rate are the same each time the fine discharge is achieved using the second discharge pipe 320. In this way, when the second discharge pipe 320 is kept at the same discharge time, more accurate discharge can be achieved, and the problem of deviation in discharge amount can be improved.
[0027] Optionally, the liquid dispensing device 010 further includes a third valve 343, which is disposed on the first discharge pipe 310 and used to control the opening and closing of the first discharge pipe 310. For example, when the second valve 342 is opened and the third discharge pipe 330 is used for initial dispensing, the third valve 343 can be opened simultaneously so that the liquid in the material cylinder 100 can simultaneously enter the buffer cylinder 200. This facilitates ensuring that the buffer cylinder 200 is full or nearly full when the initial dispensing is completed using the third discharge pipe 330, which improves the efficiency of subsequently dispensing the full liquid from the buffer cylinder 200 using the second discharge pipe 320. That is, it eliminates the need to wait until the initial dispensing is completed using the third discharge pipe 330 before feeding material into the buffer cylinder 200, thus saving dispensing time and improving efficiency.
[0028] It should be noted that when the second valve 342 and the third valve 343 are opened simultaneously, even if the buffer tank 200 is already full before the third discharge pipe 330 has completed the initial discharge, it will not have an adverse effect on the subsequent fine discharge using the second discharge pipe 320. Therefore, after the buffer tank 200 is full, even if the third valve 343 is not closed, the amount of liquid in the buffer tank 200 will not increase.
[0029] Of course, in other embodiments, the third valve 343 may not be provided on the first discharge pipe 310.
[0030] Optionally, the inner diameter of the first discharge pipe 310 is larger than the inner diameter of the second discharge pipe 320.
[0031] Of course, in other embodiments, the inner diameter of the first discharge pipe 310 may also be equal to the inner diameter of the second discharge pipe 320.
[0032] Optionally, the end of the second discharge pipe 320 not connected to the buffer cylinder 200 is connected to the third discharge pipe 330, and the connection between the second discharge pipe 320 and the third discharge pipe 330 is located downstream of the second valve 342 along the direction of liquid delivery through the third discharge pipe 330. With this configuration, when using the second discharge pipe 320 for refined discharge, the liquid entering the second discharge pipe 320 from the buffer cylinder 200 can be output through the third discharge pipe 330.
[0033] Of course, in other embodiments, the end of the second discharge pipe 320 that is connected to the buffer cylinder 200 may not be connected to the third discharge pipe 330.
[0034] Optionally, the liquid dispensing device 010 further includes an air inlet valve 210, which is disposed in the buffer cylinder 200. For example, the buffer cylinder 200 is a sealed cylinder body 110. The air inlet valve 210 on the buffer cylinder 200 facilitates opening the air inlet valve 210 when dispensing liquid from the buffer cylinder 200 using the second discharge pipe 320, maintaining pressure balance within the buffer cylinder 200, and ensuring the stability of the rate at which liquid is dispensed from the buffer cylinder 200 using the second discharge pipe 320. This improves the problem of potential deviations in the dispensing volume.
[0035] Optionally, the liquid quantitative discharge device 010 also includes a support 400, which has a through hole 411; the material cylinder 100 includes a cylinder body 110 and an outer edge plate 120, the first discharge pipe 310 is connected to the cylinder body 110, the outer edge plate 120 is connected to the outer periphery of the cylinder body 110, the cylinder body 110 is inserted into the through hole 411, and the outer edge plate 120 overlaps with the support 400 to prevent the cylinder body 110 from slipping out of the through hole 411.
[0036] For example, the bracket 400 includes a support plate 410 and a plurality of support legs 420. The plurality of support legs 420 are all connected to the support plate 410 and are used together to support the support plate 410. The support plate 410 is provided with a through hole 411. The cylinder body 110 of the material cylinder 100 is inserted into the through hole 411, and part of the cylinder body 110 is located in the space enclosed by the plurality of support legs 420, while the other part of the cylinder body 110 is distributed on the side of the support plate 410 away from the support legs 420.
[0037] The connection methods between the support leg 420 and the support plate 410 include, but are not limited to, integral molding and welding.
[0038] Optionally, the outer edge plate 120 is connected in a closed loop to the outer periphery of the cylinder block 110, and the connection method includes, but is not limited to, integral molding and welding.
[0039] Of course, in other embodiments, the material cylinder 100 includes a plurality of outer edge plates 120, which are sequentially and spaced apart from each other along the circumference of the cylinder body 110 on the outer wall of the cylinder body 110.
[0040] Optionally, the cylinder body 110 includes a cylinder body 111 and a conical portion 112. The conical portion 112 has a flared end and a constricted end. The flared end is connected to the cylinder body 111. A first discharge pipe 310 is connected to the conical surface between the flared end and the constricted end. A third discharge pipe 330 is connected to the constricted end. An outer edge plate 120 is connected to the cylinder body 111. Setting the bottom of the cylinder body 110 to be conical helps to ensure that the liquid in the cylinder body 110 can be fully discharged, thus improving the problem of excessive liquid residue in the cylinder body 110.
[0041] The connection between the cylinder body 111 and the conical portion 112 can be made in a manner including but not limited to integral molding and welding. The connection between the first discharge pipe 310 and the third discharge pipe 330 and the conical portion 112 can be made in a manner including but not limited to integral molding and welding.
[0042] Optionally, the cylinder body 111 can be a cylinder, and the conical part 112 can be conical.
[0043] Optionally, a feed inlet 113 is provided at the top of the material cylinder 100; specifically, a feed inlet 113 is provided on the top wall of the cylinder body 110 of the material cylinder 100 so as to transport liquid material into the cylinder body 110 through the feed inlet 113.
[0044] Optionally, the top of the material cylinder 100 is provided with an exhaust port 114; specifically, the top wall of the rod of the material cylinder 100 is provided with an air inlet, through which air can enter and exit the cylinder 110 to maintain the air pressure balance inside the cylinder 110, ensuring that the liquid material can be smoothly replenished into the cylinder 110 from the feed port 113, and ensuring that the liquid material can be smoothly discharged from the cylinder 110 through the first discharge pipe 310 and the third discharge pipe 330.
[0045] Optionally, the liquid quantitative discharge device 010 also includes a weighing module 500 (e.g., a weighing sensor), which is disposed between the outer edge plate 120 and the bracket 400 and is used to weigh the material cylinder 100 and the liquid in the material cylinder 100.
[0046] Optionally, the types of the first valve 341, the second valve 342, and the third valve 343 can be selected as needed, such as pneumatic butterfly valves, solenoid valves, etc., without specific limitations.
[0047] like Figure 1 The discharge process of the liquid material quantitative discharge device 010 shown includes: closing the first valve 341, opening the second valve 342 and the third valve 343, so that the material in the material cylinder 100 is output from the third discharge pipe 330 to achieve preliminary coarse discharge, and allowing the material in the material cylinder 100 to enter the buffer cylinder 200 through the first discharge pipe 310; at the end of coarse discharge, closing the second valve 342, and closing the third valve 343 when the buffer cylinder 200 is full, opening the air inlet valve 210 and the first valve 341, so that the material in the buffer cylinder 200 is output through the second discharge pipe 320 to achieve fine discharge.
[0048] Of course, in other implementations, such as Figure 1 The discharge process of the liquid quantitative discharge device 010 shown may also include: simultaneously opening the first valve 341, the second valve 342, the third valve 343 and the air inlet valve 210, so as to directly and simultaneously use the third discharge pipe 330 and the second discharge pipe 320 for discharge, thereby improving the discharge efficiency.
[0049] In other embodiments of this disclosure, please refer to Figure 2 The third discharge pipe 330 can also be connected to the buffer tank 200 so that the liquid in the material tank 100 flows through the buffer tank 200 and is then output through the third discharge pipe 330. When quantitatively discharging the liquid in the material tank 100, the third valve 343 and the second valve 342 are opened, so that the liquid in the material tank 100 enters the buffer tank 200 through the first discharge pipe 310 and is then output through the third discharge pipe 330. After the amount of liquid output is close to the target amount, the second valve 342 can be closed. When the buffer tank 200 is full, the third valve 343 is closed and the first valve 341 is opened so that the liquid in the buffer tank 200 can be output through the second discharge pipe 320, achieving the final refined discharge.
[0050] Optionally, the first discharge pipe 310 is connected to the constricted end of the tapered portion 112 of the cylinder body 110, and the inner diameter of the first discharge pipe 310 is larger than the inner diameter of the third discharge pipe 330, so that the flow rate of liquid material delivered to the buffer tank 200 through the first discharge pipe 310 is greater than the flow rate of liquid material input from the buffer tank 200 into the third discharge pipe 330. With this configuration, when both the second valve 342 and the third valve 343 are open and the first valve 341 is closed, a portion of the liquid material flowing into the buffer tank 200 from the first discharge pipe 310 will always remain in the buffer tank 200, and will not be entirely output through the third discharge pipe 330. This is beneficial for accumulating a certain amount of liquid material in the buffer tank 200 simultaneously when using the third discharge pipe 330 for initial discharge, and for improving the efficiency of filling the buffer tank 200 when the third discharge pipe 330 completes the initial discharge.
[0051] Optionally, one end of the second discharge pipe 320 is connected to the buffer tank 200 via the third discharge pipe 330, and the connection point between the second discharge pipe 320 and the third discharge pipe 330 is located upstream of the second valve 342 along the direction of liquid output from the third discharge pipe 330; the other end of the second discharge pipe 320 is also connected to the third discharge pipe 330, and the connection point between the other end of the second discharge pipe 320 and the third discharge pipe 330 is located downstream of the second valve 342 along the direction of liquid output from the third discharge pipe 330. This arrangement allows the second discharge pipe 320 to output liquid from the buffer tank 200 via the third discharge pipe 330.
[0052] Of course, in other embodiments, at least one end of the second discharge pipe 320 may not be connected to the third discharge pipe 330. For example, one end of the second discharge pipe 320 may be directly connected to the buffer cylinder 200.
[0053] like Figure 2The discharge process of the liquid material quantitative discharge device 010 shown includes: closing the first valve 341, opening the second valve 342 and the third valve 343, so that the material in the material cylinder 100 flows through the buffer cylinder 200 and is output from the third discharge pipe 330, realizing preliminary coarse discharge. At the same time, some of the material entering the buffer cylinder 200 will remain in the buffer cylinder 200. At the end of coarse discharge, the second valve 342 is closed, and when the buffer cylinder 200 is full, the third valve 343 is closed. The air inlet valve 210 and the first valve 341 are opened, so that the material in the buffer cylinder 200 is output through the second discharge pipe 320, realizing fine discharge.
[0054] Of course, in other implementations, such as Figure 2 The discharge process of the liquid quantitative discharge device 010 shown may also include: simultaneously opening the first valve 341, the second valve 342, the third valve 343 and the air inlet valve 210, so as to directly and simultaneously use the third discharge pipe 330 and the second discharge pipe 320 for discharge, thereby improving the discharge efficiency.
[0055] Please refer to Figure 3 This embodiment also provides a method for quantitative discharging of liquid materials, used in the aforementioned quantitative discharging device 010; the method for quantitative discharging of liquid materials includes: Close the first valve 341 and allow the liquid material in the material cylinder 100 to be transported into the buffer cylinder 200 through the first discharge pipe 310; Open the second valve 342 so that the liquid material in the material cylinder 100 can be directly output through the third discharge pipe 330 or flow through the buffer cylinder 200 and then be output through the third discharge pipe 330; When the buffer tank 200 is full and the amount of liquid output from the third discharge pipe 330 reaches a set value (e.g., 99% of the target discharge amount), the second valve 342 is closed and the first valve 341 is opened so that the liquid in the buffer tank 200 is output through the second discharge pipe 320 until the total discharge amount reaches the target value.
[0056] This liquid quantitative discharge method involves closing the first valve 341 and opening the second valve 342 to discharge the liquid from the material cylinder 100 using the third discharge pipe 330 until the amount of liquid discharged from the third discharge pipe 330 approaches the target amount. Then, when the buffer cylinder 200 is full of liquid and the second valve 342 is closed, the first valve 341 is opened to discharge the liquid from the buffer cylinder 200 using the second discharge pipe 320 with a smaller inner diameter. In this way, the liquid level in the buffer cylinder 200 is the same each time the second discharge pipe 320 with a smaller inner diameter is used for final fine discharge. This helps to ensure that the discharge pressure and flow rate are the same each time the second discharge pipe 320 is used for fine discharge. As a result, more accurate discharge can be achieved by maintaining the same discharge time in the second discharge pipe 320, thus improving the problem of deviation in discharge amount.
[0057] Optionally, when the second valve 342 is opened, the third valve 343 can be opened simultaneously in this liquid dispensing method.
[0058] Of course, in embodiments where the third outlet pipe is directly connected to the material cylinder 100 (e.g.) Figure 1 As shown, when opening the second valve 342, the third valve 343 may not be opened at the same time. After the initial discharge is completed using the third discharge pipe 330, the second valve 342 is closed, the first valve 341 is closed, and the third valve 343 is opened until the buffer tank 200 is full of liquid material. Then the third valve 343 is closed, the air inlet valve 210 set in the buffer tank 200 is opened, and the first valve 341 is opened for fine discharge.
[0059] In summary, the liquid material quantitative discharge device 010 and method of this utility model can more accurately achieve the target discharge amount, thereby improving the problem of discharge amount deviation.
[0060] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.
Claims
1. A liquid material dosing device, characterized by comprising: include: Material cylinder (100); Buffer cylinder (200); The first discharge pipe (310) is connected between the material cylinder (100) and the buffer cylinder (200) to allow the liquid material in the material cylinder (100) to flow into the buffer cylinder (200); The second discharge pipe (320) is connected to the buffer tank (200) and is used to output the liquid material in the buffer tank (200); The third discharge pipe (330) is connected to the material cylinder (100) or the buffer cylinder (200) so that the liquid material in the material cylinder (100) can be directly output through the third discharge pipe (330) or flow through the buffer cylinder (200) and then be output through the third discharge pipe (330). The first valve (341) is disposed on the second discharge pipe (320) to control the opening and closing of the second discharge pipe (320); A second valve (342) is disposed on the third discharge pipe (330) to control the opening and closing of the third discharge pipe (330); wherein, The inner diameter of the second discharge pipe (320) is smaller than the inner diameter of the third discharge pipe (330), and the first valve (341) is configured to open when the buffer cylinder (200) is full and the second valve (342) is closed, so that liquid material is output from the second discharge pipe (320); the second valve (342) is configured to open when the first valve (341) is closed.
2. The liquid material dosing device according to claim 1, characterized in that The liquid material quantitative discharge device also includes a third valve (343), which is disposed on the first discharge pipe (310) and is used to control the opening and closing of the first discharge pipe (310).
3. The liquid material dosing device according to claim 1, characterized in that The end of the second discharge pipe (320) that is not connected to the buffer cylinder (200) is connected to the third discharge pipe (330), and the connection between the second discharge pipe (320) and the third discharge pipe (330) is located downstream of the second valve (342) along the direction of conveying liquid material in the third discharge pipe (330).
4. The liquid material dosing device according to claim 1, characterized in that The third discharge pipe (330) is connected to the buffer cylinder (200) so that the liquid material in the material cylinder (100) flows through the buffer cylinder (200) and is output through the third discharge pipe (330). The inner diameter of the first discharge pipe (310) is larger than the inner diameter of the third discharge pipe (330) so that the flow rate of liquid material delivered to the buffer cylinder (200) through the first discharge pipe (310) is greater than the flow rate of liquid material input from the buffer cylinder (200) into the third discharge pipe (330).
5. The liquid material dosing device according to claim 1, characterized in that The liquid material metering discharge device also includes an air inlet valve (210), which is located in the buffer cylinder (200).
6. The liquid dispensing device according to any one of claims 1-5, characterized in that, The liquid quantitative discharge device also includes a support (400), which is provided with a through hole (411). The material cylinder (100) includes a cylinder body (110) and an outer edge plate (120). The first discharge pipe (310) is connected to the cylinder body (110). The outer edge plate (120) is connected to the outer periphery of the cylinder body (110). The cylinder body (110) is inserted into the through hole (411), and the outer edge plate (120) overlaps with the bracket (400) to prevent the cylinder body (110) from slipping out of the through hole (411).
7. The liquid dispensing device according to claim 6, characterized in that, The liquid material quantitative discharge device also includes a weighing module (500), which is disposed between the outer edge plate (120) and the bracket (400) and is used to weigh the material cylinder (100) and the liquid material in the material cylinder (100).
8. The liquid dispensing device according to claim 6, characterized in that, The cylinder body (110) includes a cylinder body (111) and a conical part (112). The conical part (112) has a flared end and a constricted end. The flared end is connected to the cylinder body (111). The first discharge pipe (310) is connected to the constricted end or to the conical surface between the flared end and the constricted end. The outer edge plate (120) is connected to the cylinder body (111).
9. The liquid material dosing device according to any one of claims 1 to 5, characterized in that The material cylinder (100) is provided with a feed inlet (113) at the top.
10. The liquid material dosing device according to any one of claims 1 to 5, characterized in that The material cylinder (100) is provided with an exhaust port (114) at the top.