Filling device

Abstract

The present invention discloses a filling device, comprising a liquid supply mechanism (1), a suction mechanism (5), and a filling flow path (2) communicating with the liquid supply mechanism (1), the filling flow path (2) including a throttle section (21), a metering section (22), and a filling section (23) connected in series, the suction mechanism (5) including a suction flow path (51) and a suction valve (52), one end of the suction flow path (51) being connected to the middle of the filling section (23), and the suction valve (52) being connected to the middle of the filling section (23). An extension section (24) is provided at the other end of the flow path (51), the bottom of the filling section (23) is connected to the extension section (24), the bottom of the extension section (24) is connected to a liquid outlet (25), the suction back valve (52) is provided on the suction back flow path (51), the throttle section (21) is connected to the liquid supply mechanism (1), the throttle section (21) is provided with a throttle unit (6), and the metering section (22) is provided with a metering unit (7). This filling device has a simple structure and can improve cleaning effectiveness.

Description

[Technical Field]

[0001] [CROSS-REFERENCE TO RELATED APPLICATIONS] This application is based on and claims priority from a Chinese patent application having a filing date of December 16, 2022, application number 202223544725.6, and an invention title of "Filling Apparatus," the entire contents of which are incorporated herein by reference. The present invention relates to the technical field of food and pharmaceutical packaging machinery and equipment, and in particular to a filling device. [Background technology]

[0002] Blow-fill-seal technology is a type of aseptic sealing technology, and this equipment can typically produce several dozen (10-60) products at a time. Because there are many filling heads, CIP (clean-in-place) and SIP (sterilization-in-place) are possible, filling is usually performed using the time-pressure method. That is, the filling volume is controlled by controlling the opening time of the filling valve under a constant filling pressure.

[0003] Existing related filling devices, such as the filling device disclosed in CN202222117642.2, have the following drawbacks: (1) The filling section is a vertical straight section, and both ends of the suction channel are connected at an angle to the filling section. Therefore, during the cleaning process, the cleaning liquid tends to flow straight down from the filling section, and only a small amount of cleaning liquid flows into the suction channel, resulting in a low cleaning effect of the suction channel. (2) The throttle valve and the metering valve are respectively arranged on the upstream base and the downstream base, which takes up a large space and is inconvenient to process. Summary of the Invention [Problem to be solved by the invention]

[0004] The technical problem to be solved by the present invention is to provide a filling device that overcomes the drawbacks of the prior art and has a simple structure and can improve cleaning effect. [Means for solving the problem]

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions. The present invention provides a filling device comprising a liquid supply mechanism, a suction mechanism, and a filling flow path communicating with the liquid supply mechanism, the filling flow path including a throttle section, a metering section, and a filling section connected in series, the suction mechanism including a suction flow path and a suction valve, one end of the suction flow path connected to a middle section of the filling section, an extension section provided at the other end of the suction flow path, a bottom of the filling section communicating with the extension section, a liquid outlet connected to the bottom of the extension section, the suction valve provided on the suction flow path, the throttle section communicating with the liquid supply mechanism, a throttle section provided in the throttle section, and a metering section provided in the metering section.

[0006] As a further improvement of the above technical solution, the suction flow passage is V-shaped, and the suction valve is provided at the tip of the suction flow passage.

[0007] The throttle portion is V-shaped, and a throttle valve is provided at the tip of the throttle portion.

[0008] A parallel flow path is further provided at the tip of the throttle portion.

[0009] Each of the metering portions is V-shaped, and a metering valve is provided at the tip of the metering portion.

[0010] The filling device further comprises an upstream base and a downstream base that abut each other, and a side base that abuts one side of the upstream base and the downstream base, the throttling section and the metering section being provided in the upstream base, the tips of the throttling section and the metering section all being located at the abutment point between the upstream base and the side base, the filling section, the extension section and the liquid outlet penetrating the downstream base, and the top end of the filling section extending into the upstream base, the tips of the suction flow passages all being located at the abutment point between the downstream base and the side base, and the throttling valve, the metering valve and the suction return valve all being attached to the side base.

[0011] The throttle valve, metering valve, and suck-back valve are all diaphragm valves, and the diaphragms of the valves are all clamped at the abutting points between the upstream base and the downstream base and the side base.

[0012] The filling section and the liquid outlet are both parallel to the diaphragm, and the filling section is closer to the diaphragm than the liquid outlet is to the diaphragm.

[0013] The liquid supply mechanism includes a main channel and a plurality of branch channels communicating with the main channel, and a plurality of the filling channels are provided and communicate with the branch channels in a one-to-one relationship. [Effects of the Invention]

[0014] Compared with the prior art, the advantages of the present invention are as follows: In the filling device of the present invention, the filling section is connected to the liquid outlet via the extension section, and the filling section and the liquid outlet are not directly connected, so that the cleaning liquid in the filling section does not flow directly to the liquid outlet during the cleaning process, and the blocking effect of the extension section allows more cleaning liquid to flow into the suction channel, which solves the problem of low cleaning effect of the suction channel and improves the overall cleaning effect. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a front structural schematic view of the filling device of the present invention; [Figure 2] 1 is a schematic side cross-sectional view of the filling device of the present invention. [Figure 3] FIG. 3 is an enlarged view of part A in FIG. 2. [Explanation of symbols]

[0016] 1. Liquid supply mechanism; 11. Main flow path; 12. Branch flow path; 2. Filling flow path; 21. Throttle section (nodal section, speed controller); 22. Metering section; 23. Filling section; 24. Extension section; 25. Liquid outlet; 3. Throttle valve; 4. Metering valve; 5. Suction mechanism; 51. Suction flow path; 52. Suction valve; 6. Throttle section; 61. Parallel flow path; 7. Metering section; 8. Upstream base; 9. Downstream base; 91. Side base; 92. Diaphragm. DETAILED DESCRIPTION OF THE INVENTION

[0017] The present invention will be described in more detail below based on the accompanying drawings and specific embodiments of the specification.

[0018] As shown in the present invention, unless the context clearly indicates otherwise, words such as "a," "an," "one," "a kind," and / or "the" do not specify the singular but can also include the plural. As used herein, "first," "second," and similar terms do not denote any order, quantity, or importance, but are merely used to distinguish between different components. Similarly, similar terms such as "comprise" or "include" mean that the element or member listed before the term encompasses the element or member listed after the term and its equivalents, and do not exclude other elements or members. Similar terms such as "connect" or "couple" are not limited to physical or mechanical connections, but can also include electrical connections, whether direct or indirect.

[0019] 1 to 3 show one embodiment of the filling device of the present invention. This filling device includes a liquid supply mechanism 1, a suction mechanism 5, and a filling channel 2 that communicates with the liquid supply mechanism 1. The filling channel 2 includes a throttle section 21, a metering section 22, and a filling section 23, which are connected in series. The suction mechanism 5 includes a suction channel 51 and a suction valve 52. One end of the suction channel 51 is connected to the middle of the filling section 23, and the other end is provided with an extension section 24. The bottom of the filling section 23 communicates with the extension section 24, and the bottom of the extension section 24 communicates with a liquid outlet 25. The suction valve 52 is provided on the suction channel 51. The throttle section 21 communicates with the liquid supply mechanism 1, and a throttle unit 6 is provided in the throttle section 21, and a metering unit 7 is provided in the metering section 22.

[0020] During filling, the suction valve 52 is closed and the metering valve 4 is open. After filling is complete, the metering valve 4 is closed, and then the suction valve 52 is opened to suck back fluid and prevent dripping from the filling needle. Then, before or at the same time as opening the metering valve 4 the next time, the suction valve 52 is first closed. During cleaning, both the metering valve 4 and the suction valve 52 are fully open, thereby increasing the flow rate of the cleaning fluid and improving the cleaning effect of the filling channel 2 and the suction channel 51. During sterilization, both the metering valve 4 and the suction valve 52 are fully open, and the junctions between each valve and the filling channel 2 are disinfected and sterilized, improving the sterilization effect. The throttle 6 is located upstream of the metering valve 4, which generates a pressure difference. The metering valve 4 is located upstream of the suction mechanism 5, and the pressure is blocked by the metering valve 4, so it does not affect the suction.

[0021] In this filling device, the filling section 23 is connected to the liquid outlet 25 via the extension section 24, and there is no direct communication between the filling section 23 and the liquid outlet 25. This prevents the cleaning liquid in the filling section 23 from flowing directly into the liquid outlet 25 during the cleaning process, and the blocking effect of the extension section 24 allows more cleaning liquid to flow into the suction channel 51, improving the problem of low cleaning efficiency of the suction channel 51 and thereby improving the overall cleaning effect.

[0022] In this embodiment, the suction flow path 51 is V-shaped, and the suction valve 52 is provided at the pointed end (the part where two sides of the V-shape intersect to form a V-like pointed part) of the suction flow path 51. During cleaning, by opening the suction valve 52, the cleaning liquid flows into the suction flow path 51, and the suction flow path 51 can be thoroughly cleaned.

[0023] In this embodiment, the throttle portion 6 is V-shaped, and the throttle valve 3 is provided at the tip of the throttle portion 6. By providing the throttle portion 6 in a V-shape, it becomes easy to attach the throttle valve 3.

[0024] In this embodiment, a parallel flow path 61 is further provided at the tip of the throttle section 6. During filling, the throttle valve 3 can be completely closed, and the filling medium flows through the parallel flow path 61. This prevents the throttle point from fluctuating during filling, making the filling process more stable. In addition, the throttle valve 3, metering valve 4, and open / suckback valve 52 are vertically spaced apart, with the throttle (nodal flow) at the top, which is unaffected by pressure differences and reduces the risk of dripping.

[0025] In this embodiment, the metering parts 7 are all V-shaped, and the metering valves 4 are provided at the pointed ends of the metering parts 7. By providing the metering parts 7 in a V-shape, it becomes easy to attach the metering valves 4.

[0026] 2 , the filling device further includes an upstream base 8 and a downstream base 9 that fit together (combine) with each other, and a side base 91 that fits together on one side of the upstream base 8 and the downstream base 9. The throttle section 21 and the metering section 22 are provided in the upstream base 8, and the tips of the throttle section 6 and the metering section 7 are located at the joints (abutting, joining, or joining) between the upstream base 8 and the side base 91. The filling section 23, the extension section 24, and the liquid outlet 25 pass through the downstream base 9, and the top end of the filling section 23 extends into the upstream base 8. The tip of the suction return channel 51 is located at the joint (abutting, joining, or joining) between the downstream base 9 and the side base 91, and the throttle valve 3, the metering valve 4, and the suction return valve 52 are all attached to the side base 91.

[0027] The tips of the throttle section 21, metering unit 7 and suction flow path 51 are all located where the downstream base 9 and side base 91 abut, and the throttle valve 3, metering valve 4 and suction flow path 52 are all attached to the side base 91 and are aligned and connected to the tips of the throttle section 21, metering unit 7 and suction flow path 51, respectively. As a result, during installation, it is only necessary to first attach the throttle valve 3, metering valve 4 and suction flow path 52 to the side base 91, and then fit the side base 91 with the upstream base 8 and downstream base 9. Specifically, the upstream base 8 and downstream base 9 are installed one above the other.

[0028] Both the throttle valve 3 and the metering valve 4 are located on the upstream base 8, which effectively saves space and simplifies processing. In addition, the top end of the filling section 23 extends within the upstream base 8, with its lower portion located within the downstream base 9 and its upper portion located within the upstream base 8, which facilitates separation processing and joining (connecting).

[0029] In this embodiment, the throttle valve 3, the metering valve 4, and the suck-back valve 52 are all diaphragm valves, and the diaphragm 92 of each valve is sandwiched between the upstream base 8 and the downstream base 9 and the contact point between the side base 91. This allows the diaphragm 92 of each valve to be provided independently or integrally.

[0030] In this embodiment, both the filling section 23 and the liquid outlet 25 are parallel to the diaphragm 92, and the filling section 23 is closer to the diaphragm 92 than the liquid outlet 25. The bottom of the extension section 24 is inclined toward the liquid outlet 25, and the distance of the filling section 23 from the diaphragm 92 is less than three times the diameter of the filling section 23, making the suction flow path 51 easier to clean.

[0031] In this embodiment, the liquid supply mechanism 1 includes a main channel 11 and a plurality of branch channels 12 that communicate with the main channel 11, and a plurality of filling channels 2 are provided, which communicate one-to-one with the branch channels 12. By filling via a plurality of filling channels 2, it is possible to improve filling efficiency.

[0032] Parallel flow paths 61 are provided at the tip of the throttle section 6. The parallel flow paths 61 are V-shaped and are set smaller than the filling flow paths 2, allowing the flow rate during filling to be reduced. This makes the flow rate of the medium passing through each parallel flow path 61 more uniform when each filling flow path 2 is filled, making the filling process more stable and increasing filling accuracy.

[0033] Although the present invention has been disclosed above with preferred embodiments, the present invention is not limited thereto. Those skilled in the art can make many possible changes and modifications to the technical solutions of the present invention using the technical content disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention are all within the protection scope of the technical solutions of the present invention.

Claims

1. A liquid supply mechanism (1); a suck-back mechanism (5); a filling flow path (2) communicating with the liquid supply mechanism (1); The filling channel (2) includes a throttle section (21), a metering section (22), and a filling section (23) connected in series; The suction-back mechanism (5) includes a suction-back flow path (51) and a suction-back valve (52), One end of the suction flow passage (51) is connected to the middle part of the filling section (23), and the other end of the suction flow passage (51) is provided with an extension section (24); The bottom of the filling section (23) communicates with the extension section (24), A liquid outlet (25) is connected to the bottom of the extension section (24), The suction return valve (52) is provided on the suction return flow path (51), The throttle section (21) is in communication with the liquid supply mechanism (1); The throttle section (21) is provided with a throttle portion (6), A filling device characterized in that the metering section (22) is provided with a metering part (7).

2. 2. The filling device according to claim 1, wherein the suction passage (51) is V-shaped, and the suction valve (52) is provided at the tip of the suction passage (51).

3. 3. The filling device according to claim 2, wherein the throttle portion (6) is V-shaped and a throttle valve (3) is provided at the tip of the throttle portion (6).

4. 4. The filling device according to claim 3, wherein a parallel flow path (61) is further provided at the tip of the throttle portion (6).

5. 4. The filling device according to claim 3, wherein each of said measuring portions (7) is V-shaped and a measuring valve (4) is provided at the tip of each of said measuring portions (7).

6. 6. The filling device according to claim 5, further comprising an upstream base (8) and a downstream base (9) abutting against each other, and a side base (91) abutting against one side of the upstream base (8) and the downstream base (9), wherein the throttle section (21) and the metering section (22) are provided in the upstream base (8), the tips of the throttle section (6) and the metering section (7) are all located at the abutting point between the upstream base (8) and the side base (91), the filling section (23), the extension section (24), and the liquid outlet (25) pass through the downstream base (9), and the top end of the filling section (23) extends into the upstream base (8), the tips of the suction return flow path (51) are all located at the abutting point between the downstream base (9) and the side base (91), and the throttle valve (3), the metering valve (4), and the suction return valve (52) are all attached to the side base (91).

7. The filling device according to claim 6, characterized in that the throttle valve (3), the metering valve (4), and the suction back valve (52) are all diaphragm valves, and the diaphragms (92) of each valve are all clamped at the abutment points between the upstream base (8) and the downstream base (9) and the side base (91).

8. 8. The filling device according to claim 7, wherein the filling section (23) and the liquid outlet (25) are both parallel to the diaphragm (92), and the filling section (23) is closer to the diaphragm (92) than the liquid outlet (25) is to the diaphragm (92).

9. The liquid supply mechanism (1) includes a main flow path (11) and a plurality of branch flow paths (12) connected to the main flow path (11), and the filling flow paths (2) are provided in plurality and are connected one-to-one to the branch flow paths (12).

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