Filling device

Abstract

Disclosed in the present invention is a filling device, the filling device comprises a liquid supply mechanism (1), a suck-back mechanism (5), and a filling channel (2) communicating with the liquid supply mechanism (1). The filling channel (2) comprises a throttling section (21), a metering section (22) and a filling section (23) which are successively connected, the suck-back mechanism (5) comprises a suck-back channel (51) and a suck-back valve (52), the suck-back channel (51) has an end connected to a middle of the filling section (23) as well as an end provided with an extended section (24), a bottom end of the filling section (23) communicates with the extended section (24), a bottom end of the extended section (24) communicates with a liquid outlet end (25), the suck-back valve (52) is arranged on the suck-back channel (51), the throttling section (21) communicates with the liquid supply mechanism (1) and provided with a throttling portion (6), and the metering section (22) is provided with a metering portion (7). The filling device has advantages such as simple structure and improved cleaning effect.

Description

Cross-Reference to Related Applications

[0001] The application is based on and claims priority to Chinese Patent Application No. 202223544725.6, filed on December 16, 2022, entitled "Filling Device", which is incorporated herein by reference in its entirety, as one part of the application.Field of the Invention

[0002] The invention relates to the technical field of mechanical equipment for food and medicine packaging, in particular to a filling device.Background of the Invention

[0003] The blow-fill-seal (BFS) technique is an aseptic packaging technique. A BFS device generally produces dozens of (10-60) products at a time. Due to the large number of filling nozzles, to realize clean in place (CIP) and sanitize in place (SIP), a time-pressure method is often adopted for filling, that is, under a certain filling pressure, the turn-on time of a filling valve is controlled to control the filling quantity.

[0004] Existing related filling devices, such as the filling device provided by Patent Application No. CN202222117642.2, have the following defects: (1) A filling section is a vertical straight section, and two ends of a suck-back channel are obliquely connected to the filling section; during the cleaning process, cleaning liquid directly flows downward from the filling section more easily, and only a little cleaning liquid flows back into the suck-back channel, leading to an unsatisfactory cleaning effect on the suck-back channel; (2) A throttling valve and a metering valve are respectively located on an upstream base and a downstream base, thus occupying a large space and being inconvenient to machine. Summary of the Invention

[0005] The technical issue to be settled by the invention is to overcome the defects in the prior art by providing a filling device, which is simple in structure and capable of improving the cleaning effect.

[0006] To settle the above technical issue, the invention adopts the following technical solution: A filling device, comprises a liquid supply mechanism , a suck-back mechanism and a filling channel communicating with the liquid supply mechanism , wherein the filling channel comprises a throttling section , a metering section and a filling section which are successively connected, the suck-back mechanism comprises a suck-back channel and a suck-back valve , the suck-back channel has an end connected to a middle of the filling section as well as an end provided with an extended section , a bottom end of the filling section communicates with the extended section , a bottom end of the extended section communicates with a liquid outlet end , the suck-back valve is arranged on the suck-back channel , the throttling section communicates with the liquid supply mechanism, a throttling portion is provided on the throttling section, and the metering section is provided with a metering portion .

[0007] As a further improvement to the above technical solution: The suck-back channel is V-shaped, and the suck-back valve is arranged at a sharp corner of the suck-back channel.

[0008] The throttling portion is V-shaped, and a throttling valve is arranged at a sharp corner of the throttling portion.

[0009] A parallel channel is arranged at the sharp corner of the throttling portion.

[0010] The metering portion is V-shaped, and a metering valve is arranged at a sharp corner of the metering portion.

[0011] The filling device further comprises an upstream base and a downstream base which are spliced together and a side base spliced on a side of the upstream base and the downstream base , wherein the throttling section and the metering section are arranged in the upstream base , the sharp corner of the throttling portion and the sharp corner of the metering portion are located at a splicing position between the upstream base and the side base , the filling section , the extended section and the liquid outlet end penetrate through the downstream base , and a top end of the filling section extends into the upstream base , the sharp corner of the suck-back channel is located at a splicing position between the downstream base and the side base , and the throttling valve , the metering valve and the suck-back valve are mounted on the side base .

[0012] The metering valve and the suck-back valve are membrane valves, and membranes of the throttling valve, the metering valve and the suck-back valve are located at the splicing position between the upstream base and the side base as well as the splicing position between the downstream base and the side base.

[0013] The filling section and the liquid outlet end are parallel to the membranes, and a distance from the filling section to the membranes is less than a distance from the liquid outlet end to the membranes.

[0014] The liquid supply mechanism comprises 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 one-to-one correspondence.

[0015] Compared with the prior art, the invention has the following advantages: According to the filling device provided by the invention, the filling section is connected to the liquid outlet end by means of the extended section rather than being directly connected to the liquid outlet end, such that cleaning liquid in the filling section is prevented from directly flowing into the liquid outlet during the cleaning process; and under the blocking effect of the extended section, more cleaning liquid flows back into the suck-back channel to better clean the suck-back channel, thus improving the overall cleaning effect.Brief Description of the Drawings

[0016] FIG. 1 is a front structural view of a filling device according to the invention. FIG. 2 is a side sectional structural view of the filling device according to the invention. FIG. 3 is an enlarged view of part A in FIG. 2.

[0017] Reference signs: 1, liquid supply mechanism; 11, main channel; 12, branch channel; 2, filling channel; 21, throttling section; 22, metering section; 23, filling section; 24, extended section; 25, liquid outlet end; 3, throttling valve; 4, metering valve; 5, suck-back mechanism; 51, suck-back channel; 52, suck-back valve; 6, throttling portion; 61, parallel channel; 7, metering portion; 8, upstream base; 9, downstream base; 91, side base; 92, membrane.Detailed Description of the Invention

[0018] The invention is described in further detail below in conjunction with accompanying drawings and specific embodiments.

[0019] As indicated in the invention, terms such as "a / an", "one", "one type" and / or "said" do not refer in particular to the singular form and may also include the plural form, unless otherwise expressly stated in the context. "First", "second" and similar terms used in the disclosure do not indicate any sequence, quantity or importance and are only used for distinguishing different components. Similarly, "comprises", "include" or other similar terms are intended to indicate that an element or article before said term covers elements, articles or their equivalents after said term, not excluding other elements or articles. "Connect", "link" and similar terms are not limited to physical or mechanical connection and may include electrical connection no matter whether the connection is direct or indirect.

[0020] Referring to FIGS. 1-3 which illustrate one embodiment of a filling device according to the invention, the filling device includes a liquid supply mechanism 1, a suck-back mechanism 5, and a filling channel 2 communicating with the liquid supply mechanism 1. The filling channel 2 includes a throttling section 21, a metering section 22 and a filling section 23 which are successively connected. The suck-back mechanism 5 includes a suck-back channel 51 and a suck-back valve 52. One end of the suck-back channel 51 is connected to the middle of the filling section 23, and the other end of the suck-back channel 51 is provided with an extended section 24. A bottom end of the filling section 23 communicates with the extended section 24. A bottom end of the extended section 24 communicates with a liquid outlet end 25. The suck-back valve 52 is arranged on the suck-back channel 51. The throttling section 21 communicates with the liquid supply mechanism 1, a throttling portion 6 is provided on the throttling section 21. The metering section 22 is provided with a metering portion 7.

[0021] During filling, the suck-back valve 52 is turned off, and a metering valve 4 is turned on. After filling is completed, the metering valve 4 is turned off, and then the suck-back valve 52 is turned on to realize suck-back, such that liquid drops are prevented from being retained in a filling needle; and before or when the metering valve 4 is turned on next time, the suck-back valve 52 is turned off. During cleaning, the metering valve 4 and the suck-back valve 52 are turned on completely to increase the flow rate of cleaning liquid so as to improve the cleaning effect on the filling channel 2 and the suck-back channel 51. During sanitizing, the metering valve 4 and the suck-back valve 52 are turned on completely, and the portions, matched with the filling channel 2, of the valves are sanitized, thus improving the sanitizing effect. The throttling portion 6 is arranged at an upstream position of the metering valve 4, such that a pressure difference is generated by throttling; and the metering valve 4 is arranged at an upstream position of the suck-back mechanism 5, such that the pressure is blocked by the metering valve 4 and will not exert an influence on suck-back.

[0022] According to the filling device, the filling section 23 is connected to the liquid outlet end 25 by means of the extended section 24 rather than being directly connected to the liquid outlet end 25, such that cleaning liquid in the filling section 23 is prevented from directly flowing into the liquid outlet 25 during the cleaning process; and under the blocking effect of the extended section 24, more cleaning liquid flows back into the suck-back channel 51 to better clean the suck-back channel 51, thus improving the overall cleaning effect.

[0023] In this embodiment, the suck-back channel 51 is V-shaped, and the suck-back valve 52 is arranged at a sharp corner of the suck-back channel 51. During cleaning, the suck-back valve 52 is turned on to allow cleaning liquid to enter the suck-back channel 51, such that the suck-back channel 51 is thoroughly cleaned.

[0024] In this embodiment, the throttling portion 6 is V-shaped, and a throttling valve 3 is arranged at a sharp corner of the throttling portion 6. The throttling portion 6 is V-shaped, such that the throttling valve 3 may be mounted easily.

[0025] In this embodiment, a parallel channel 61 is arranged at the sharp corner of the throttling portion 6. During filling, the throttling valve 3 may be completely turned off, and a filling medium flows through the parallel channel 61. In this way, a throttling point remains unchanged during filling, making the filling process more stable. In addition, the throttling valve 3, the metering valve 4 and the suck-back valve 52 are arranged at intervals in the vertical direction, and throttling is performed at the upper end and has no influence on the pressure difference, thus lowering the risk of liquid dripping.

[0026] In this embodiment, the metering portion 7 is V-shaped, and the metering valve 4 is arranged at a sharp corner of the metering portion 7. The metering portion 7 is V-shaped, such that the metering valve 4 may be mounted easily.

[0027] In this embodiment, as shown in FIG. 2, the filling device further includes an upstream base 8 and a downstream base 9 which are spliced together and a side base 91 spliced on one side of the upstream base 8 and the downstream base 9. The throttling section 21 and the metering section 22 are arranged in the upstream base 8. The sharp corner of the throttling portion 6 and the sharp corner of the metering portion 7 are located at a splicing position between the upstream base 8 and the side base 91. The filling section 23, the extended section 24 and the liquid outlet end 25 penetrate through the downstream base 9, and a top end of the filling section 23 extends into the upstream base 8. The sharp corner of the suck-back channel 51 is located at a splicing position between the downstream base 9 and the side base 91. The throttling valve 3, the metering valve 4 and the suck-back valve 52 are mounted on the side base 91.

[0028] The sharp corner of the throttling valve 21, the sharp corner of the metering portion 7 and the sharp corner of the suck-back channel 51 are located at the splicing position between the downstream base 9 and the side base 91, and the throttling valve 3, the metering valve 4 and the suck-back valve 52 are mounted on the side base 91 and matched and connected with the sharp corner of the throttling valve 21, the sharp corner of the metering portion 7 and the sharp corner of the suck-back channel 51. In this way, during installation, the throttling valve 3, the metering valve 4 and the suck-back valve 52 are mounted on the side base 91, and then the side base 91 is spliced on the upstream base 8 and the downstream base 9. Specifically, the upstream base 8 and the downstream base 9 are arranged with one above the other.

[0029] The throttling valve 3 and the metering valve 4 are located on the upstream base 8, such that space is effectively saved, and machining is easy. In addition, the top end of the filling section 23 extends into the upstream base 8, that is, a lower portion of the filling section 23 is located in the downstream base 9 and an upper portion of the filling section 23 is located in the upstream base 8, such that the upper portion and the lower portion of the filling section 23 may be machined separately and then spliced together.

[0030] In this embodiment, the throttling valve 3, the metering valve 4 and the suck-back valve 52 are membrane valves, and membranes 92 of the throttling valve 3, the metering valve 4 and the suck-back valve 52 are located at the splicing position between the upstream base 8 and the side base 91 as well as the splicing position between the downstream base 9 and the side base 91. In this way, the membranes of the throttling valve 3, the metering valve 4 and the suck-back valve 52 may be arranged separately or integrally.

[0031] In this embodiment, the filling section 23 and the liquid outlet end 25 are parallel to the membranes 92, and the distance from the filling section 23 to the membranes 92 is less than the distance from the liquid outlet end 25 to the membranes 92. The bottom end of the extended section 24 inclines towards the liquid outlet end 25, and the distance from the filling section 23 to the membranes 92 is three times less than the diameter of the filling section 23, such that the suck-back channel 51 is easier to clean.

[0032] In this embodiment, the liquid supply mechanism 1 includes a main channel 11 and a plurality of branch channels 12 communicating with the main channel 11. A plurality of filling channels 2 are provided and communicate with the branch channels 12 in one-to-one correspondence. By providing the plurality of filling channels 2 for filling, the filling efficiency is improved.

[0033] Parallel channels 61 are arranged at the sharp corners of the throttling portions 6. The parallel channels 61 are V-shaped and smaller than the filling channels 2, such that the flow rate during filling is decreased. In this way, when filling is performed by means of the filling channels 2, the flow rate of a medium in the parallel channels 61 is more uniform, the filling process is more stable, and the filling accuracy is higher.

[0034] Although the invention has been disclosed above with reference to preferred embodiments, the above embodiments are not intended to limit the invention. For any skilled in the art, many possible variations and modifications may be made to the technical solution of the invention according to the technical contents disclosed above without departing from the scope of the technical solution of the invention. Therefore, any simple amendments, equivalent variations and embellishments made to the above embodiments according to the technical essence of the invention without departing from the contents of the technical solution of the invention should also fall within the protection scope of the technical solution of the invention.

Claims

1. A filling device, comprising a liquid supply mechanism (1), a suck-back mechanism (5) and a filling channel (2) communicating with the liquid supply mechanism (1), wherein the filling channel (2) comprises a throttling section (21), a metering section (22) and a filling section (23) which are successively connected, the suck-back mechanism (5) comprises a suck-back channel (51) and a suck-back valve (52), the suck-back channel (51) has an end connected to a middle of the filling section (23) as well as an end provided with an extended section (24), a bottom end of the filling section (23) communicates with the extended section (24), a bottom end of the extended section (24) communicates with a liquid outlet end (25), the suck-back valve (52) is arranged on the suck-back channel (51), the throttling section (21) communicates with the liquid supply mechanism (1), a throttling portion (6) is provided on the throttling section (21), and the metering section (22) is provided with a metering portion (7).

2. The filling device according to Claim 1, wherein the suck-back channel (51) is V-shaped, and the suck-back valve (52) is arranged at a sharp corner of the suck-back channel (51).

3. The filling device according to Claim 2, wherein the throttling portion (6) is V-shaped, and a throttling valve (3) is arranged at a sharp corner of the throttling portion (6).

4. The filling device according to Claim 3, wherein a parallel channel (61) is arranged at the sharp corner of the throttling portion (6).

5. The filling device according to Claim 3, wherein the metering portion (7) is V-shaped, and a metering valve (4) is arranged at a sharp corner of the metering portion (7).

6. The filling device according to Claim 5, further comprising an upstream base (8) and a downstream base (9) which are spliced together, and a side base (91) spliced on a side of the upstream base (8) and the downstream base (9), wherein the throttling section (21) and the metering section (22) are arranged in the upstream base (8), the sharp corner of the throttling portion (6) and the sharp corner of the metering portion (7) are located at a splicing position between the upstream base (8) and the side base (91), the filling section (23), the extended section (24) and the liquid outlet end (25) penetrate through the downstream base (9), and a top end of the filling section (23) extends into the upstream base (8), the sharp corner of the suck-back channel (51) is located at a splicing position between the downstream base (9) and the side base (91), and the throttling valve (3), the metering valve (4) and the suck-back valve (52) are mounted on the side base (91).

7. The filling device according to Claim 6, wherein the throttling valve (3), the metering valve (4) and the suck-back valve (52) are membrane valves, and membranes (92) of the throttling valve (3), the metering valve (4) and the suck-back valve (52) are located at the splicing position between the upstream base (8) and the side base (91) as well as the splicing position between the downstream base (9) and the side base (91).

8. The filling device according to Claim 7, wherein the filling section (23) and the liquid outlet end (25) are parallel to the membranes (92), and a distance from the filling section (23) to the membranes (92) is less than a distance from the liquid outlet end (25) to the membranes (92).

9. The filling device according to any one of Claims 1-8, wherein the liquid supply mechanism (1) comprises a main channel (11) and a plurality of branch channels (12) communicating with the main channel (11), and a plurality of the filling channels (2) are provided and communicate with the branch channels (12) in one-to-one correspondence.

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