Drip-proof filling head and filling machine

Abstract

The invention relates to the field of liquid filling, and provides a drip-proof filling head and a filling machine, the drip-proof filling head comprises a discharging pipeline, a first piston, a liquid pumping pipe, a negative pressure assembly and a first driving assembly, and a first discharging opening and a second discharging opening are formed in the bottom and the side wall of the lower end of the discharging pipeline correspondingly; the first piston is in sliding fit with the inner wall of the discharging pipeline; a lower guide part is arranged at the lower end of the first piston; the liquid pumping pipe is located in the discharging pipeline and connected with the first piston, the lower end of the liquid pumping pipe penetrates through the lowest point of the lower guide part, and the bottom of the liquid pumping pipe is lower than or equal to the lowest point of the lower guide part; the negative pressure assembly is communicated with the liquid pumping pipe; the first driving assembly is connected with the liquid pumping pipe and used for driving the liquid pumping pipe to move, so that the first piston slides to close or open the second discharging port, and when the second discharging port is closed by the first piston, the lower guiding part is located on the outer side of the first discharging port. The problem that the anti-leakage effect of filling equipment is poor is solved.

Description

Technical Field

[0001] The present application relates to the field of liquid filling, and in particular to a drip-proof filling head and a filling machine. Background Art

[0002] Liquid filling is a crucial step in modern industrial production, widely used in industries such as food, beverages, and pharmaceuticals. With the advancement of automation technology, the precision and efficiency of filling equipment have been significantly improved, significantly enhancing the overall effectiveness of production lines. However, with the diversification of market demands and the expansion of production scale, traditional filling equipment still faces numerous challenges in coping with complex operating conditions.

[0003] After liquid filling is completed, there are residual droplets on the filling head, which can easily drip onto the container or conveyor line and cause contamination. Currently, the remaining droplets on the filling head are usually treated by catching the droplets with a container or using negative pressure to absorb the droplets.

[0004] However, to achieve rapid filling or when solid particles are present in the material, the filling head is often designed to be larger. After filling, the remaining liquid may not quickly form droplets, but instead spread out at the bottom of the filling head, making it difficult to handle the remaining liquid. If left untreated, as the filling head moves and the liquid inside continues to flow down, the liquid at the bottom of the filling head may gather into droplets and fly out at any time, causing contamination. Summary of the Invention

[0005] In order to solve the problem of poor anti-drip effect of filling equipment, the present application provides an anti-drip filling head and a filling machine.

[0006] In a first aspect, the present application provides a drip-proof filling head, comprising: The discharge pipe has a first discharge port at the bottom, and a second discharge port is provided on the lower end side wall of the discharge pipe.

[0007] The first piston is arranged in the discharge pipe and slidably fits against the inner wall of the discharge pipe. The lower end of the first piston is provided with a lower guide portion which is wider at the top and narrower at the bottom.

[0008] The liquid extraction pipe is at least partially located in the discharge pipe, and the liquid extraction pipe is connected to the first piston. The lower end of the liquid extraction pipe passes through the lowest point of the lower guide part and the bottom height of the liquid extraction pipe is lower than or equal to the height of the lowest point of the lower guide part.

[0009] a negative pressure assembly, connected to the upper end of the liquid withdrawal tube and used to create negative pressure in the liquid withdrawal tube; The first driving assembly is connected to the liquid pumping tube and is used to drive the liquid pumping tube to move, so that the first piston slides to close or open the second discharge port, and when the first piston closes the second discharge port, the lower guide portion is located on the outside of the first discharge port.

[0010] By adopting the above technical solution, the filling head can quickly gather and process the remaining liquid. Specifically: The first piston can slide downward to open the second discharge port, and the material can be discharged from the second discharge port and filled.

[0011] The first piston can close the second discharge port by sliding upward, and the first piston can scrape the material around the second discharge port on the inner wall of the discharge pipe when moving upward, preventing the material from continuing to flow out of the second discharge port.

[0012] The residual material at the second discharge port can flow to the bottom of the liquid extraction pipe through the guidance of the lower guide part, and then be sucked away by the liquid extraction pipe.

[0013] Preferably, the first piston has a first state and a second state.

[0014] In the first state, the first piston closes the first discharge port but does not block the second discharge port.

[0015] In the second state, the first piston closes the first discharge port and the second discharge port, and the lower guide portion is located outside the first discharge port.

[0016] By adopting the above technical solution, the filling head can accurately control the opening and closing of the discharge port under different conditions, ensuring accurate measurement and effective sealing of the material during the filling process.

[0017] Preferably, the first piston further has a third state.

[0018] In the third state, the first piston does not block the first discharge port and the second discharge port.

[0019] By adopting the above technical solution, the first piston of the filling head has three states: first, second, and third. In the third state, the first piston does not block the first and second outlets, allowing material to be discharged from both outlets simultaneously, accelerating filling efficiency. Furthermore, after filling through the first outlet, the first piston becomes wetted, enhancing the flow diversion effect of the lower guide.

[0020] Preferably, the first piston includes an upper guide portion, a middle portion and the lower guide portion which are sequentially connected from top to bottom.

[0021] The upper guide portion is in a structure that is narrow at the top and wide at the bottom.

[0022] The side wall of the middle portion is used to fit tightly with the inner wall of the discharge pipe.

[0023] By adopting this technical solution, the upper guide portion of the first piston has a narrow upper and wide lower structure, making it easier for the first piston to return to the discharge pipe after leaving it. The sidewalls of the middle portion fit tightly against the inner wall of the discharge pipe, ensuring that the first piston effectively seals the various discharge openings in the discharge pipe during sliding, preventing material leakage and improving filling accuracy and reliability.

[0024] Preferably, the drip-proof filling head further includes a second piston.

[0025] The second piston is arranged in the discharge pipe and is slidably fitted with the inner wall of the discharge pipe. The liquid extraction tube passes through the second piston and is connected to the second piston.

[0026] A feed port is provided on a portion of the discharge pipe between the second piston and the first discharge port.

[0027] By adopting the above technical solution, the second piston can limit the liquid extraction pipe, thereby limiting and guiding the first piston. Secondly, the second piston can push out the material in the discharge pipe by sliding, completing the cleaning of the discharge pipe.

[0028] Preferably, the height of the second discharge port gradually decreases in a direction away from the inner side of the discharge pipe.

[0029] By adopting the above technical solution, the height of the second discharge port gradually decreases in the direction away from the inner side of the discharge pipe, so that the material can flow out obliquely downward during the discharge process, avoiding the material splashing out of the container to be filled; secondly, the inclined second discharge port facilitates the outflow of material in the second discharge port and converges at the bottom of the liquid extraction pipe.

[0030] Preferably, a collecting groove is provided on the outer wall of the discharge pipe, and the collecting groove is used to connect the second discharge port and the bottom of the discharge pipe.

[0031] By adopting the above technical solution, the collecting trough can effectively collect the material flowing out from the second discharge port and guide it to the bottom of the discharge pipe, avoiding the material from remaining on the outer wall of the discharge pipe, accelerating the material convergence speed, reducing the difficulty of cleaning, and improving the cleanliness and anti-drip effect of the equipment.

[0032] Preferably, there are multiple second discharge ports, and the multiple second discharge ports are arranged at intervals along the circumferential direction.

[0033] By adopting the above technical solution, multiple second discharge ports are arranged at intervals along the circumference, which can increase the uniformity of material outflow and improve filling efficiency and accuracy. The design of multiple discharge ports also helps to reduce the pressure of a single discharge port and extend the service life of the equipment.

[0034] Preferably, a third discharge port is further provided on the discharge pipe, and there is a distance between the third discharge port and the second discharge port along the axial direction of the discharge pipe. The first piston can slide to simultaneously close the first discharge port, the second discharge port and the third discharge port.

[0035] By adopting the above technical solution, the filling machine can realize the simultaneous closure of multiple discharge ports under different working conditions, ensuring the precise control of the filling process. Specifically: The first piston can simultaneously close the first discharge port, the second discharge port and the third discharge port by sliding, effectively preventing material leakage and improving filling accuracy and stability.

[0036] The design of multiple discharge ports allows the filling machine to flexibly adjust the position of the first piston according to actual needs, thereby changing the discharge position and flow rate, enhancing the adaptability and operational flexibility of the equipment.

[0037] In a second aspect, the present application further provides a filling machine, comprising: a feeding assembly, a second driving assembly and the drip-proof filling head described in any one of the above items.

[0038] The feeding assembly is connected to the discharge pipe and is used to transport materials into the discharge pipe.

[0039] The second driving assembly is connected to the discharge pipe and is used to drive the anti-drip filling head to move closer to or away from the container to be filled.

[0040] By adopting the above technical solution, the filling machine provided by the present invention can achieve precise control of the inflow and outflow of materials and effectively prevent the occurrence of dripping. Specifically: 1. Anti-drip function: Through the design of the first piston and the second piston in the discharge pipe, the opening and closing of the first discharge port and the second discharge port can be accurately controlled under different conditions to ensure that no dripping occurs during the filling process.

[0041] 2. Multiple discharge port design: There are multiple second discharge ports and they are spaced apart along the circumference, so that the material can flow out evenly, improving the filling efficiency and stability.

[0042] 3. Collecting trough design: The collecting trough on the outer wall of the discharge pipe can effectively collect the material flowing out from the second discharge port and guide it to the bottom of the discharge pipe, further reducing material waste and pollution.

[0043] 4. Dynamic adjustment: The first drive assembly can drive the liquid extraction tube to move, so that the first piston closes or opens the second discharge port by sliding, realizing dynamic control of the filling process and ensuring filling accuracy and reliability.

[0044] 5.Automated operation: The second drive component can drive the anti-drip filling head close to or away from the container to be filled, realizing automated operation and improving production efficiency and safety.

[0045] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the different states of the first piston (blocking the first discharge port but not blocking the second discharge port, blocking the first and second discharge ports at the same time, and not blocking the first and second discharge ports), precise control of liquid flow is achieved, avoiding liquid dripping and improving the stability and accuracy of the filling process; 2. The lower end of the liquid extraction tube passes through the lowest point of the lower guide part of the first piston, so that the bottom height of the liquid extraction tube is lower than or equal to the height of the lowest point of the lower guide part. After the filling is completed, the residual liquid can be quickly withdrawn, further reducing the risk of dripping and improving the filling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural diagram of the filling machine provided in this application.

[0047] Figure 2 This application provides Figure 1 Enlarged schematic diagram of point A in the middle.

[0048] Figure 3 It is a partial schematic diagram of Example 1 provided in the present application when the first piston is in the first state.

[0049] Figure 4 This application provides Figure 3 Enlarged schematic diagram of point B in the middle.

[0050] Figure 5 It is a partial schematic diagram of Example 1 provided in the present application when the first piston is in the second state.

[0051] Figure 6 It is a partial schematic diagram of Example 1 provided in the present application when the first piston is in the third state.

[0052] Figure 7 It is a partial schematic diagram of the anti-drip filling head in Example 2 provided in this application.

[0053] Description of reference numerals: 1. Discharge pipe; 11. First discharge port; 12. Second discharge port; 13. Collecting trough; 14. Third discharge port; 2. First piston; 21. Upper guide portion; 22. Intermediate portion; 23. Lower guide portion; 3. Liquid extraction tube; 4. First drive assembly; 5. Second piston; 6. Feed assembly; 7. Second drive assembly; 71. Second cylinder; 72. Mounting bracket; 8. Conveying components; 200. Containers to be filled. DETAILED DESCRIPTION

[0054] The following is combined with Figures 1 to 7 This application is described in further detail.

[0055] Example 1 like Figures 1 to 3 As shown, an embodiment of the present application provides a drip-proof filling head, including a discharge pipe 1, a first piston 2, a liquid suction pipe 3, a negative pressure component and a first drive component 4.

[0056] The discharge pipe 1 is a vertically arranged circular pipe with a first discharge port 11 at its bottom, and a second discharge port 12 is provided on the side wall of the lower end of the discharge pipe 1 .

[0057] The first piston 2 is disposed in the discharge pipe 1 and slidably fits against the inner wall of the discharge pipe 1 .

[0058] The liquid extraction pipe 3 is arranged vertically and is at least partially located in the discharge pipe 1, and the liquid extraction pipe 3 is connected to the first piston 2. The lower end of the liquid extraction pipe 3 passes through the lowest point of the lower guide part 23 and the bottom height of the liquid extraction pipe 3 is lower than or equal to the height of the lowest point of the lower guide part 23.

[0059] The first drive assembly 4 is connected to the liquid extraction tube 3 and is used to drive the liquid extraction tube 3 to move along the axial direction of the discharge pipe 1, so that the first piston 2 slides to close or open the second discharge port 12, and when the first piston 2 closes the second discharge port 12, the lower guide portion 23 is located on the outside of the first discharge port 11.

[0060] Since the liquid extraction pipe 3 is connected to the first piston 2, the liquid extraction pipe 3 and the first piston 2 can move synchronously along the axis direction of the discharge pipe 1. When the first piston 2 moves, it can switch between the first state, the second state and the third state.

[0061] like Figures 3 and 4 As shown, in the first state, the first piston 2 closes the first discharge port 11 but does not block the second discharge port 12. The material in the discharge pipe 1 can flow out from the second discharge port 12 for filling.

[0062] like Figure 5 As shown, in the second state, the first piston 2 closes the first discharge port 11 and the second discharge port 12, the material in the discharge pipe 1 cannot flow out, and the filling process stops.

[0063] like Figure 6 As shown, in the third state, the first piston 2 moves downwardly away from the discharge pipe 1, and the first piston 2 does not block the first discharge port 11 and the second discharge port 12. The material in the discharge pipe 1 can flow out from the first discharge port 11 and the second discharge port 12 at the same time for filling, thereby improving the filling efficiency.

[0064] When filling is required, the first drive assembly 4 drives the liquid extraction tube 3 and the first piston 2 to move downward synchronously, thereby switching the first piston 2 from the second state to the first state or the third state, thereby performing filling. After filling is completed, the first piston 2 moves upward and returns to the second state, stopping filling. When the first piston 2 moves upward to the second state, it can move the material on the inner wall of the discharge pipe 1 around the second discharge port 12 upward, thereby preventing the material from continuing to flow out of the second discharge port 12. The second discharge port 12 is as close to the bottom of the discharge pipe 1 as possible, so that any material remaining at the second discharge port 12 can flow to the bottom of the discharge pipe 1.

[0065] The first piston 2 includes an upper guide portion 21 , a middle portion 22 and a lower guide portion 23 which are sequentially connected from top to bottom.

[0066] The upper guide portion 21 has a frustoconical structure, narrow at the top and wide at the bottom. When the first piston 2 switches from the third state to the first or second state, the first piston 2 must return to the discharge pipe 1. The upper guide portion 21 then serves as a guide, facilitating the smooth return of the first piston 2 to the discharge pipe 1. Furthermore, in the third state, the upper guide portion 21 guides material flowing out of the first discharge port 11, reducing impact and evenly directing it in different directions.

[0067] The middle portion 22 is cylindrical in structure, and the side wall of the middle portion 22 is used to fit tightly with the inner wall of the discharge pipe 1. Specifically, a sealing ring can be sleeved on the middle portion 22 to increase the sealing performance.

[0068] The lower guide portion 23 has an inverted truncated cone structure that is wider at the top and narrower at the bottom. The lower end of the liquid extraction tube 3 extends through the lowest point of the lower guide portion 23, and the bottom height of the liquid extraction tube 3 is lower than or equal to the lowest point of the lower guide portion 23. When the first piston 2 is in the second state, the lower guide portion 23 is located outside the first discharge port 11, and the top of the lower guide portion 23 is flush with the bottom of the discharge pipe 1, with a smooth transition. This allows any remaining material at the bottom of the discharge pipe 1 to flow along the lower guide portion 23 and ultimately converge at the bottom of the liquid extraction tube 3.

[0069] The negative pressure generating assembly is connected to the upper end of the liquid extraction pipe 3 and can create negative pressure in the liquid extraction pipe 3 to suck away the material gathered at the bottom of the liquid extraction pipe 3, thereby preventing the residual material from dripping and causing pollution.

[0070] The negative pressure generating component may be an air pump, and the first driving component 4 may be a first air cylinder.

[0071] like Figure 3 As shown, the filling head further includes a second piston 5. The second piston 5 is disposed within the discharge pipe 1 and slidably engages the inner wall of the discharge pipe 1. The liquid extraction tube 3 passes through the second piston 5 and is connected to the second piston 5. The portion of the discharge pipe 1 between the second piston 5 and the first discharge port 11 is provided with a feed port, through which material enters the discharge pipe 1.

[0072] The second piston 5 limits the position of the liquid extraction tube 3. When the first piston 2 switches from the third state to the first state or the second state, the second piston 5 prevents the first piston 2 from deviating from its movement path. Furthermore, after filling is completed, the first drive assembly 4 drives the liquid extraction tube 3 downward, allowing the second piston 5 to move downward to push out material adhering to the inner wall of the discharge pipe 1, thereby preventing material waste and simultaneously completing the cleaning of the discharge pipe 1.

[0073] Furthermore, the height of the second discharge port 12 gradually decreases in a direction away from the inner side of the discharge pipe 1 .

[0074] Specifically, the lower end of the discharge pipe 1 has a tapered structure that is wider at the top and narrower at the bottom, making it easier for the discharge pipe 1 to extend into the container 200 to be filled. A second discharge port 12 is arranged at an angle on the tapered structure. Multiple second discharge ports 12 may be provided, evenly spaced along the circumference. The tilted second discharge port 12 allows material ejected from the second discharge port 12 to be ejected diagonally downward, preventing it from splashing out of the container 200 to be filled. Furthermore, the tilted second discharge port 12 facilitates the outflow of any remaining material within the second discharge port 12 and its convergence at the bottom of the liquid extraction pipe 3.

[0075] Furthermore, a collecting groove 13 is provided on the outer wall of the discharge pipe 1. This groove 13 connects the second discharge port 12 with the bottom of the discharge pipe 1. Any remaining material at the second discharge port 12 flows along the collecting groove 13 to the bottom of the discharge pipe 1, where it is further guided by the lower guide portion 23 and converges at the bottom of the liquid extraction pipe 3. The collecting groove 13 prevents the remaining material from becoming too dispersed.

[0076] like Figures 1 to 3 As shown, this embodiment further provides a filling machine, comprising a feeding assembly 6, a second driving assembly 7, a conveying assembly 8 and the above-mentioned anti-drip filling head.

[0077] Specifically, the conveyor assembly 8 can be a belt conveyor or a chain conveyor. The conveyor assembly 8 is used to transport the containers 200 to be filled. The conveyor assembly 8 can be provided with multiple receiving slots for the containers 200 to be filled, thereby ensuring accurate positioning of the containers 200. For example, the conveyor assembly 8 can be provided with multiple evenly spaced partitions, with the partitions forming receiving slots therebetween. The slots are sized to accommodate the containers 200 to be filled. By placing the containers 200 to be filled into the receiving slots and then conveying them through the conveyor assembly 8, the containers 200 to be filled can be accurately delivered to the bottom of the anti-drip filling head. For applications where positioning accuracy is not high, this method can achieve rapid positioning between the anti-drip filling head and the containers 200 to be filled. Of course, for applications requiring higher positioning accuracy, other conventional positioning methods, such as industrial camera-assisted positioning, can be used, which will not be discussed here.

[0078] The feeding assembly 6 may include a feeding pipe, a valve, and a feeding pump. The valve is provided on the feeding pipe, and the feeding pipe is connected to the feeding port on the discharge pipe 1. When filling is required, the valve is opened, and the feeding pump transports the material through the feeding pipe to the discharge pipe 1.

[0079] The second driving assembly 7 may include a second cylinder 71 and a mounting bracket 72. The first cylinder and the discharge pipe 1 of the anti-drip filling head are both arranged on the mounting bracket 72. The second cylinder 71 drives the mounting bracket 72 to rise and fall, so that the filling head can be raised and lowered and moved closer to or away from the container 200 to be filled.

[0080] Example 2 The difference between this embodiment and embodiment 1 is that a third discharge port 14 is further provided on the discharge pipe 1 , and a distance exists between the third discharge port 14 and the second discharge port 12 along the axial direction of the discharge pipe 1 .

[0081] like Figure 7 As shown, specifically, the third discharge port 14 can be provided above the second discharge port 12 , and there can be multiple third discharge ports 14 , which are evenly spaced along the circumferential direction.

[0082] The first piston 2 can change the discharge position and flow rate of the material by sliding, and when the first piston 2 slides to the highest point of the lower guide part 23 and is flush with the bottom of the discharge pipe 1, the first piston 2 can simultaneously close the first discharge port 11, the second discharge port 12 and the third discharge port 14, thereby stopping the discharge, and the residual material at the second discharge port 12 and the third discharge port 14 can flow to the bottom of the discharge pipe 1 through the collecting groove 13, and be further guided by the lower guide part 23 to converge at the bottom of the liquid suction pipe 3.

Claims

1. A drip-proof filling head, characterized in that: include: A discharge pipe (1) having a first discharge port (11) at the bottom, and a second discharge port (12) is provided on the side wall at the lower end of the discharge pipe (1); A first piston (2) is disposed in the discharge pipe (1) and slidably fits against the inner wall of the discharge pipe (1), wherein the lower end of the first piston (2) has a lower guide portion (23) which is wider at the top and narrower at the bottom; a liquid extraction pipe (3) at least partially located in the discharge pipe (1), the liquid extraction pipe (3) being connected to the first piston (2), the lower end of the liquid extraction pipe (3) passing through the lowest point of the lower guide portion (23), and the bottom height of the liquid extraction pipe (3) being lower than or equal to the height of the lowest point of the lower guide portion (23); A negative pressure component, connected to the upper end of the liquid extraction tube (3) and used to create a negative pressure in the liquid extraction tube (3); A first driving assembly (4) is connected to the liquid extraction pipe (3) and is used to drive the liquid extraction pipe (3) to move, so that the first piston (2) closes or opens the second discharge port (12) by sliding, and when the first piston (2) closes the second discharge port (12), the lower guide portion (23) is located outside the first discharge port (11).

2. The anti-drip filling head according to claim 1, characterized in that: The first piston (2) has a first state and a second state; In the first state, the first piston (2) closes the first discharge port (11) but does not block the second discharge port (12); In the second state, the first piston (2) closes the first discharge port (11) and the second discharge port (12), and the lower guide portion (23) is located outside the first discharge port (11).

3. The anti-drip filling head according to claim 2, characterized in that: The first piston (2) also has a third state; In the third state, the first piston (2) does not block the first discharge port (11) and the second discharge port (12).

4. The anti-drip filling head according to claim 3, characterized in that: The first piston (2) comprises an upper guide portion (21), a middle portion (22), and the lower guide portion (23) which are connected in sequence from top to bottom; The upper guide portion (21) is of a structure that is narrow at the top and wide at the bottom; The side wall of the middle portion (22) is used to fit tightly with the inner wall of the discharge pipe (1).

5. The anti-drip filling head according to claim 3, characterized in that: The anti-drip filling head also includes a second piston (5); The second piston (5) is arranged in the discharge pipe (1) and is slidably fitted with the inner wall of the discharge pipe (1), and the liquid extraction pipe (3) passes through the second piston (5) and is connected to the second piston (5); A feed port is provided in the portion of the discharge pipe (1) between the second piston (5) and the first discharge port (11).

6. The anti-drip filling head according to claim 1, characterized in that: The height of the second discharge port (12) gradually decreases in a direction away from the inner side of the discharge pipe (1).

7. The anti-drip filling head according to claim 1, characterized in that: A collecting groove (13) is provided on the outer wall of the discharge pipe (1), and the collecting groove (13) is used to connect the second discharge port (12) and the bottom of the discharge pipe (1).

8. The anti-drip filling head according to claim 1, characterized in that: The number of the second material outlets (12) is multiple, and the multiple second material outlets (12) are arranged at intervals along the circumferential direction.

9. The anti-drip filling head according to claim 1, characterized in that: The discharge pipe (1) is also provided with a third discharge port (14), and there is a spacing between the third discharge port (14) and the second discharge port (12) along the axial direction of the discharge pipe (1), and the first piston (2) can slide to simultaneously close the first discharge port (11), the second discharge port (12) and the third discharge port (14).

10. A filling machine, characterized in that: include: A feeding assembly (6), a second driving assembly (7), and the drip-proof filling head according to any one of claims 1 to 9; The material supply assembly (6) is connected to the material discharge pipe (1) and is used to transport materials into the material discharge pipe (1); The second driving assembly (7) is connected to the discharge pipe (1) and is used to drive the anti-drip filling head to move closer to or away from the container (200) to be filled.

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