Drip-proof liquid filling head

Abstract

The utility model provides a kind of liquid filling head of anti-dripping, belong to liquid filling technical field, specific filling head includes perfusion pipe, outer protective tube, buffer hopper, apron, for driving the driving mechanism of the apron up and down movement and for detecting the position detection element of the apron position;The perfusion pipe is as main body delivery pipeline, for conveying liquid;The outer protective tube is sleeved in the perfusion pipe outside;The buffer hopper is fixedly installed in the perfusion pipe bottom;The apron is located between the outer protective tube and the perfusion pipe, can slide in the axial direction of the perfusion pipe;The liquid filling head of this anti-dripping can solve the problem that liquid drips in the gap between two filling bottles when current conventional liquid filling head carries out liquid filling process.

Description

Technical Field

[0001] This utility model belongs to the field of liquid filling technology, specifically relating to a drip-proof liquid filling head. Background Technology

[0002] A liquid filling machine is a device used to automatically fill liquid products into containers. With the rapid development of modern industry, liquid filling machines are playing an increasingly important role in various industries, especially in the fields of food, cosmetics, pharmaceuticals, and chemicals.

[0003] Currently, conventional liquid filling machines generally include the following types: Gravity filling machine: It uses gravity to distribute liquid into containers, which is simple and economical; Pump filling machine: Uses pumps to accurately measure and transfer liquids, ensuring accuracy and consistency; Overflow filling machine: It achieves high-speed filling by allowing excess liquid to overflow and fill the container to a predetermined level.

[0004] Based on the above types of liquid filling machines, the commonly used filling methods include atmospheric pressure, isobaric, negative pressure, siphon, and mechanical pressure.

[0005] In liquid filling, the quality of the filling head determines the smoothness of the filling process. In pursuit of efficiency, many factories use high-pressure filling. However, this method not only requires high accuracy and strength from the filling head, but also causes liquid splashing due to excessive filling speed. This not only wastes raw materials, but the splashed liquid can also damage the equipment. Utility Model Content

[0006] In view of this, the present invention proposes a drip-proof liquid filling head, which can solve the problems of liquid splashing during the filling process of conventional low-viscosity liquids, and especially the problem of liquid dripping during the switching between two filling bottles.

[0007] This utility model is implemented as follows: This utility model provides a drip-proof liquid filling head, including: a filling tube, an outer protective tube, a buffer hopper, a cover plate, a driving mechanism for driving the cover plate to move up and down, and a position detection element for detecting the position of the cover plate; The injection pipe serves as the main conveying pipe for transporting liquid; the outer protective pipe is sleeved on the outside of the injection pipe; the buffer hopper is fixedly installed at the bottom of the injection pipe; the cover plate is located between the outer protective pipe and the injection pipe and can slide up and down axially on the injection pipe.

[0008] Based on the above technical solution, the anti-drip liquid filling head of this utility model can be further improved as follows: Furthermore, the driving mechanism includes a fixed plate and a telescopic pressure rod. The fixed plate is fixedly installed between the outer protective tube and the injection tube. The upper end of the telescopic pressure rod is fixed to the lower surface of the fixed plate, and the lower end of the telescopic pressure rod is fixedly connected to the cover plate.

[0009] Furthermore, there are multiple telescopic pressure rods, which are arranged in a circumferential array around the periphery of the injection tube.

[0010] Furthermore, the telescopic pressure rod includes an outer fixed sleeve, a telescopic head, and a spring disposed between the two, the spring being used to provide a force to return the cover plate to its original position after it moves upward.

[0011] Furthermore, the liquid filling head also includes a suction pipe for drawing the liquid remaining in the buffer hopper to an additional storage device, the suction pipe being fitted to the outer wall of the filling tube.

[0012] Furthermore, the position detection element is a photoresistor, which is fixedly installed on the outer wall of the injection tube and located above the cover plate in the normal state, for detecting the position of the cover plate.

[0013] Furthermore, a hole is provided in the center of the cover plate, through which the injection pipe and the back suction pipe pass, allowing the cover plate to slide up and down along it.

[0014] Furthermore, the cover plate is provided with at least one vent hole, which is used to balance the air pressure inside the bottle and the outside during filling.

[0015] Furthermore, the vent includes a first vent and a second vent. The first vent is located between the outer edge of the buffer hopper and the inner edge of the bottle mouth, and the second vent is opened on the outer edge of the cover plate.

[0016] Furthermore, an outlet is provided at the connection between the injection pipe and the buffer hopper.

[0017] Compared with existing technologies, the beneficial effects of the anti-drip liquid filling head provided by this utility model are: 1. The combination of a buffer hopper and a suction tube effectively prevents dripping: Buffer hopper: When filling stops, it can catch any liquid that may drip from the end of the filling tube, serving as a temporary storage container to prevent it from dripping directly.

[0018] Back suction pipe: It is triggered when the filling head is lifted and the cover is reset, actively sucking away the residual liquid accumulated in the buffer hopper, fundamentally eliminating the source of leakage and ensuring cleanliness after filling.

[0019] 2. The impact of the liquid flow is reduced by using a "buffer hopper": After the liquid comes out of the outlet of the injection pipe, it first enters the buffer tank with a larger space, where its kinetic energy is buffered and dissipated.

[0020] The buffered liquid then flows smoothly into the bottle, greatly reducing impact and splashing, making the filling process smoother and more precise.

[0021] 3. Intelligent linkage control is achieved through "photoresistor detection of cover plate position": When the filling head moves down and the cap is lifted by the bottle mouth, the photoresistor is triggered, and the system automatically starts filling accordingly.

[0022] When filling is finished, the filling head moves up, and the cover plate is reset under the action of the telescopic pressure rod, triggering the photoresistor again. Based on this, the system automatically starts back suction and stops filling. Attached Figure Description

[0023] Figure 1 This is an isometric view of the overall structure. Figure 2 This is a cross-sectional view before filling; Figure 3 This is a cross-sectional view during filling; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is an isometric drawing of the internal structure.

[0024] Based on the above figures, the reference numerals and their names in the figures are as follows: 1. Filling pipe; 11. Outlet; 2. Outer protective pipe; 3. Buffer hopper; 4. Cover plate; 41. First vent hole; 42. Second vent hole; 5. Photoresistor; 6. Fixing plate; 7. Telescopic pressure rod; 8. Back suction pipe. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0026] As shown in the figure, this utility model provides a drip-proof liquid filling head, mainly used to avoid problems such as dripping, splashing, and abnormal air pressure inside the bottle during the liquid filling process. The following describes its structural composition and working principle.

[0027] Structural components: The liquid filling head assembly includes a filling tube 1, an outer protective tube 2, a buffer hopper 3, a cover plate 4, a fixing plate 6, a telescopic pressure rod 7, a back suction tube 8, and a photoresistor 5. The back suction tube 8 is located outside the filling tube 1, fitting snugly against its outer wall. The buffer hopper 3 is fixedly installed at the bottom of the filling tube 1. The outer protective tube 2 is also fitted over the filling tube 1.

[0028] A fixing plate 6 is fixedly installed between the outer protective pipe 2 and the injection pipe 1. A telescopic pressure rod 7 is fixedly installed on the lower surface of the fixing plate 6, and a cover plate 4 is fixedly installed at the end of the telescopic pressure rod 7. The cover plate 4 has a hole in the center and can slide up and down along the injection pipe 1 and the return suction pipe 2. The cover plate 4 is located above the buffer hopper 3.

[0029] The photoresistor 5 is installed on the outer wall of the injection tube 1 and is located above the cover plate 4 in the normal state, close to the upper surface of the cover plate 4.

[0030] The filling pipe 1, as the main conveying pipe, is primarily responsible for introducing liquid from the storage tank into the filling bottle. The outer protective pipe 2 is mainly used to protect and support the internal structure. The buffer hopper 3 is mainly used to buffer the liquid during the filling process, and also to catch any liquid dripping inside the equipment to prevent it from leaking outside. The telescopic lever 7 is mainly used to move the cover plate 4 upwards and downwards during the liquid filling process. The photoresistor 5 is mainly used to detect the position of the cover plate 4 and to control the start / stop of filling and the backflow operation.

[0031] In this embodiment, there are four telescopic pressure rods 7, arranged in a circumferential array around the periphery of the injection tube 1. The telescopic pressure rods 7 are specifically divided into an outer fixed sleeve, a telescopic head, and a spring between the inner telescopic head and the outer fixed sleeve. The cover plate 4 moves up and down on the injection tube 1 by the telescopic head moving up and down inside the fixed sleeve, and the spring realizes the return of the cover plate 4 to its original position after moving up.

[0032] Specifically, an outlet 11 is provided at the connection between the filling pipe 1 and the buffer hopper 3 to release the liquid in the filling pipe 1 and add liquid into the filling bottle.

[0033] The cover plate 4 has a first vent 41 and a second vent 42. The first vent 41 is located between the outer edge of the buffer hopper 3 and the inner edge of the bottle mouth, while the second vent 42 is located on the outer edge of the cover plate 4. By using the first vent 41 and the second vent 42, the internal air pressure of the filling bottle is balanced with the external atmospheric pressure, thus avoiding problems such as liquid splashing, air pressure impacting the equipment, and bottle rupture due to excessive internal air pressure during liquid filling.

[0034] The specific principle of this utility model is as follows: During filling, the liquid filling head moves downwards as a whole, and the bottom surface of the cover plate 4 contacts the bottle opening first. At this time, the liquid filling head continues to move downwards, the cover plate 4 is lifted by the bottle, the cover plate 4 separates from the upper surface of the buffer hopper 3, the cover plate 4 triggers the photoresistor 5, the system triggers the start of filling, the liquid enters the filling pipe 1 from the storage tank, and exits from the outlet 11 at the bottom of the filling pipe 1. After being buffered by the buffer hopper 3, the liquid enters the bottle.

[0035] After a fixed time, the liquid in the storage tank stops flowing to the filling pipe 1, and filling stops. The liquid filling head moves upward, and the cover plate 4 is pushed back to its original position by the telescopic pressure rod 7. During the return of the cover plate 4 to its original position, the photosensitive resistor 5 will be activated again. At this time, the system activates the back suction pipe 8 to suck the liquid remaining in the buffer hopper 3 into an additional storage device. At the same time, the liquid filling head continues to move upward until it separates from the filling bottle, completing the filling process.

[0036] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations 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. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A drip-proof liquid filling head, characterized in that, include: Injection pipe (1), outer protective pipe (2), buffer hopper (3), cover plate (4), drive mechanism for driving the cover plate (4) to move up and down, and position detection element for detecting the position of the cover plate (4); The injection pipe (1) serves as the main conveying pipe for conveying liquid; the outer protective pipe (2) is sleeved on the outside of the injection pipe (1); the buffer hopper (3) is fixedly installed at the bottom of the injection pipe (1); the cover plate (4) is located between the outer protective pipe (2) and the injection pipe (1) and can slide up and down axially in the injection pipe (1).

2. The anti-drip liquid filling head according to claim 1, characterized in that, The driving mechanism includes a fixed plate (6) and a telescopic pressure rod (7). The fixed plate (6) is fixedly installed between the outer protective tube (2) and the injection tube (1). The upper end of the telescopic pressure rod (7) is fixed to the lower surface of the fixed plate (6), and the lower end of the telescopic pressure rod (7) is fixedly connected to the cover plate (4).

3. The anti-drip liquid filling head according to claim 2, characterized in that, The telescopic pressure rods (7) are multiple and arranged in a circumferential array around the injection pipe (1).

4. A drip-proof liquid filling head according to claim 2 or 3, characterized in that, The telescopic pressure rod (7) includes an outer fixed sleeve, a telescopic head, and a spring disposed between the two, the spring being used to provide a force to reset the cover plate (4) after it moves upward.

5. A drip-proof liquid filling head according to claim 1, characterized in that, It also includes a suction pipe (8) for drawing liquid remaining in the buffer hopper (3) to an additional storage device, the suction pipe (8) being fitted to the outer wall of the infusion pipe (1).

6. The anti-drip liquid filling head according to claim 1, characterized in that, The position detection element is a photoresistor (5), which is fixedly installed on the outer wall of the injection tube (1) and located above the cover plate (4) in the normal state, for detecting the position of the cover plate (4).

7. A drip-proof liquid filling head according to claim 1, characterized in that, The cover plate (4) has a hole in the center, through which the injection pipe (1) and the back suction pipe (8) pass, allowing the cover plate (4) to slide up and down.

8. A drip-proof liquid filling head according to claim 1 or 7, characterized in that, At least one vent is provided on the cover plate (4), which is used to balance the air pressure inside the bottle and the outside during filling.

9. A drip-proof liquid filling head according to claim 8, characterized in that, The vent includes a first vent (41) and a second vent (42). The first vent (41) is located between the outer edge of the buffer hopper (3) and the inner edge of the bottle mouth, and the second vent (42) is opened on the outer edge of the cover plate (4).

10. A drip-proof liquid filling head according to claim 1, characterized in that, An outlet (11) is provided at the connection between the injection pipe (1) and the buffer hopper (3).

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