Filling equipment for suspending agent

Abstract

The invention relates to the field of suspending agent packaging, in particular to suspending agent filling equipment which comprises a box body, a limiting mechanism, a filling mechanism, a stock bin mechanism and a conveying mechanism. The limiting mechanism drives a baffle through a telescopic electric cylinder to achieve accurate positioning of the packaging bottle. According to the filling mechanism, a linear motor drives a filling pipe to adjust the height, a sealing plug of a filling connector and an airflow cleaning structure are matched, and residual liquid is prevented from dripping; the stock bin mechanism adopts a stirring paddle and a circulating pipe to ensure the uniformity of the suspending agent; and the conveying mechanism is linked with the piston through the material suction barrel to realize equal-volume filling. The equipment solves the problems of low filling precision, uneven settlement of the suspending agent and residual pollution in the prior art, has the advantages of accurate positioning, uniform filling, high automation degree and the like, and is suitable for high-precision filling production of the suspending agent.

Description

Technical Field

[0001] The present invention relates to the field of suspension packaging, and particularly to a filling device for suspensions. Background Art

[0002] As a heterogeneous system with solid particles dispersed in a liquid medium, suspensions are widely used in fields such as pesticides, pharmaceuticals, coatings, and cosmetics. The filling process requires ensuring uniform particle distribution, accurate filling volume, and no contamination, which poses stringent requirements on the filling device. However, the high-concentration characteristics of suspensions and the tendency of particles to settle easily make it difficult to maintain uniformity during the dynamic filling process. For example, when the low-shear stirring is insufficient, the particles are prone to aggregation, while excessive stirring may introduce air bubbles, exacerbating the filling error. In addition, the viscosity differences of different suspensions are significant, and traditional filling devices are difficult to adapt to multiple types of products, with insufficient flexibility, restricting production versatility.

[0003] In addition, most existing filling devices use mechanical valves to control the flow rate. Although the structure is simple, liquid droplet residues are easily generated when the valves open and close, causing pollution to the packaging bottle mouth and material waste. Especially in the high-speed filling scenario, the dripping problem is more prominent. Summary of the Invention

[0004] To solve the foregoing technical problems, the present invention provides a filling device for suspensions, which solves the problems of low filling accuracy, uneven sedimentation of suspensions, and residual pollution in the prior art, and is specifically achieved through the following technical solutions.

[0005] A filling device for suspensions of the present invention includes a box body, with a square through-hole oppositely opened on its side surface; A conveyor, installed in the square through-hole, for conveying packaging containers to the filling position; A limiting mechanism, installed on the side of the conveyor, including a support frame, a telescopic electric cylinder, and a baffle. The telescopic electric cylinder drives the baffle to intermittently block the packaging containers on the conveyor for positioning; A filling mechanism, installed above the limiting mechanism, including a linear motor, a mounting frame, and a plurality of filling pipes. The linear motor drives the mounting frame to drive the filling pipes to lift and lower to dock with the packaging containers; A material storage mechanism for storing suspensions, including a material storage bin, a stirring paddle, and a circulation pipe. The stirring paddle is rotatably arranged in the material storage bin, and the circulation pipe cooperates with a circulation pump to realize the circulation of suspensions; A conveying mechanism, including a screw, a driving plate, and a suction bucket. The screw drives the driving plate to lift and lower through a rotating motor, and the suction bucket is connected to the material storage bin and the filling pipes through a three-way valve to convey suspensions to the filling pipes in equal volume; Among them, the filling pipe includes a main pipe, a switching part and a filling joint. The switching part drives a plug column to open and close the feed pipe of the main pipe through air pressure. The filling joint is provided with an annular groove, a vent hole and a sealing ring, and the residual suspending agent is removed by air flow.

[0006] Preferably, in the limiting mechanism, two sets of structures composed of the telescopic electric cylinder and the baffle are symmetrically distributed about the center of the support frame for synchronously positioning a plurality of packaging containers.

[0007] Preferably, the switching part includes a sleeve, a first piston and a connecting rod. The sleeve controls the air pressure to drive the first piston through a second air valve and a third air valve, and then drives the plug column to open and close the feed pipe.

[0008] Preferably, the filling joint further includes a sealing plug and a compression spring. The sealing plug is linked with the sealing ring through a connecting rod, and the compression spring drives the sealing plug to reset to block the vent hole.

[0009] Preferably, multiple groups of the circulation pipes are evenly distributed along the length direction of the silo and are symmetrically arranged on both sides.

[0010] Preferably, in the conveying mechanism, the suction bucket is connected with a second piston through a driving connecting rod, and the second piston slides in the suction bucket to extrude the suspending agent.

[0011] Preferably, the three-way valve communicates the silo and the suction bucket when the driving plate descends, and switches to communicate the suction bucket and the filling pipe when it ascends.

[0012] Preferably, the sealing ring seals and separates the internal spaces of the main pipe and the sleeve, and the connecting rod is hermetically and slidably arranged inside the sealing ring.

[0013] Preferably, the mounting bracket is slidably connected with a guiding support through a first guiding rod, and the guiding support is fixed inside the box body.

[0014] Preferably, the conveying mechanism further includes a guiding pipe and a second guiding rod. The guiding pipe is slidably arranged on the second guiding rod to limit the movement track of the driving plate.

[0015] After adopting the above technical solutions, the beneficial effects of the present invention are as follows: 1. The present invention realizes the precise positioning of the packaging bottle through the combination of the symmetric telescopic electric cylinder and the baffle in the limiting mechanism, and cooperates with the height adjustment of the filling pipe driven by the linear motor to ensure the rapid and precise docking of the filling pipe and the bottle mouth, significantly improving the filling efficiency.

[0016] 2. The filling joint is designed with an annular groove, a vent hole and a linkage structure of the sealing plug, and combines the air valve to control the air flow, which can completely remove the residual suspending agent and avoid dripping pollution.

[0017] 3. The silo mechanism is equipped with stirring paddles, multiple groups of circulation pipes and circulation pumps. Through dynamic stirring and forced circulation flow, it effectively prevents particle sedimentation, ensures the uniformity of the suspending agent, and improves the consistency of the filled products.

[0018] 4. The conveying mechanism adopts a linkage design of a suction bucket and a piston. Through the switching of a three-way valve and the drive of a screw, it realizes the equal-volume extraction and evacuation of the suspending agent, avoids air mixing, and ensures the high uniformity of the single filling volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a perspective view of the filling equipment for the suspending agent; Figure 2 It is an installation schematic diagram of the core components of the filling equipment for the suspending agent; Figure 3 It is a structural schematic diagram of the limiting mechanism; Figure 4 It is a structural schematic diagram of the filling mechanism; Figure 5 It is a structural schematic diagram of the filling pipe; Figure 6 For Figure 5 the front sectional view; Figure 7 For Figure 5 the partially sectioned and disassembled schematic diagram; Figure 8 It is an installation schematic diagram of the silo mechanism and the transmission mechanism; Figure 9 For Figure 8 the front perspective view of the partial structure.

[0021] Description of the reference numerals: 101 - box body, 102 - conveyor; 200 - limiting mechanism, 201 - support frame, 202 - telescopic electric cylinder, 203 - baffle; 300 - Filling mechanism, 301 - Linear motor, 302 - Mounting frame, 303 - First guide rod, 304 - Guide support, 305 - Profile, 310 - Filling pipe, 311 - Main pipe, 312 - Mounting plate, 313 - Feed pipe, 314 - Plug column, 315 - Sealing washer, 320 - Filling joint, 321 - Joint housing, 322 - Annular groove, 323 - First valve, 324 - Vent hole, 325 - Inner ring, 326 - Through slot, 327 - Connecting rod, 328 - Sealing ring, 329 - Sealing plug, 330 - Mounting pipe, 331 - Compression spring, 340 - On - off part, 341 - Sleeve, 342 - Second valve, 343 - Third valve, 344 - First piston, 345 - Connecting rod, 346 - Sealing ring; 400 - Silo mechanism, 401 - Silo, 402 - Incoming material valve, 403 - Driving motor, 404 - Stirring paddle, 405 - Circulation pipe, 406 - Circulation pump, 407 - Output pipe; 500 - Conveying mechanism, 501 - Rotating motor, 502 - Screw, 503 - Nut, 504 - Driving plate, 505 - Guide pipe, 506 - Second guide rod, 507 - Fixed plate, 508 - Suction bucket, 509 - Three - way valve, 510 - Driving connecting rod, 511 - Second piston. Detailed implementation mode

[0022] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. To make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in combination with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention.

[0023] The orientation terms appearing in the following description are all the directions shown in the drawings and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "installation, connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present invention can be understood according to specific situations.

[0024] An embodiment of the present invention provides a filling device for a suspending agent. Refer to Figure 1, the filling equipment for the suspending agent includes a box body 101. A square through hole communicating with the outside is opened on the side surface of the box body 101. A conveyor 102 is installed in the square through hole. The conveyor 102 is used to convey empty packaging bottles or packaging boxes to the filling position.

[0025] See Figure 2 , Figure 3 , a limiting mechanism 200 is installed on the side surface of the conveyor 102. The limiting mechanism 200 includes a support frame 201. The support frame 201 is fixedly installed inside the box body 101. A telescopic electric cylinder 202 is fixedly installed at the upper end of the support frame 201. The output end of the telescopic electric cylinder 202 is fixed to a baffle 203. The baffle 203 can be intermittently arranged above the conveyor 102 to block the packaging bottles or packaging boxes during the transfer of the conveyor 102, so as to facilitate the limitation of their positions and then complete the filling.

[0026] Among them, two sets of structures composed of the telescopic electric cylinder 202 and the baffle 203 are symmetrically distributed about the center of the support frame 201, which is convenient for positioning a fixed number of packaging bottles and is conducive to completing the filling docking.

[0027] See Figure 2 , Figure 4 , a filling mechanism 300 is installed above the limiting mechanism 200. The filling mechanism 300 includes a linear motor 301 fixedly installed inside the box body 101. The output end of the linear motor 301 is fixed to a mounting frame 302. The mounting frame 302 is fixed to the first ends of at least two first guide rods 303. The first guide rods 303 are slidably arranged in through holes opened on a guide support 304. The guide support 304 is fixedly installed inside the box body 101.

[0028] A profile 305 is fixedly installed on the side surface of the mounting frame 302. A number of filling pipes 310 are fixedly installed along the length direction of the profile 305. The filling pipes 310 are used to align with the packaging bottles and inject the suspending agent into them.

[0029] The above structure drives the mounting frame 302 to move along the height direction through the linear motor 301, and drives the up and down movement of a number of filling pipes 310 through the profile 305 fixed on the side surface of the mounting frame 302. After the packaging bottles on the conveyor 102 are conveyed to the target position, the linear motor 301 is used to control the height adjustment of a number of filling pipes 310, so that the filling pipes 310 are docked with the packaging bottles, and then the filling work is completed.

[0030] As a further explanation of the above embodiment, see Figure 5 , Figure 6 , Figure 7, the filling pipe 310 includes a main pipe 311, an on-off part 340 installed at the top of the main pipe 311, and a filling joint 320 installed at the bottom of the main pipe 311. The side of the main pipe 311 is fixed to the first end of the mounting plate 312, and the second end of the mounting plate 312 is fixedly installed on the profile 305. The bottom side of the main pipe 311 is fixedly connected to the feed pipe 313, and the feed pipe 313 is used to convey the suspending agent into the main pipe 311. A plug column 314 is hermetically and slidably arranged inside the main pipe 311, and the plug column 314 can completely seal and block the feed pipe 313. A sealing gasket 315 is arranged at the bottom end of the main pipe 311, and the main pipe 311 is hermetically and fixedly installed with the filling joint 320 through the sealing gasket 315.

[0031] The on-off part 340 installed at the top of the main pipe 311 is used to drive the up and down movement of the plug column 314. When the filling action is to be completed, the on-off part 340 drives the plug column 314 to move upward, so that the suspending agent is injected into the main pipe 311 through the feed pipe 313, and then is conveyed to the packaging bottle through the filling joint 320 to complete the filling. After the conveyance of the suspending agent is completed, the on-off part 340 drives the plug column 314 to move downward, evacuates the suspending agent inside the plug column 314, and blocks the feed pipe 313 to avoid the appearance of air bubbles in the feed pipe 313, thus affecting the filling volume and filling accuracy of the suspending agent.

[0032] The filling joint 320 installed at the bottom of the main pipe 311 is used to complete the docking and filling with the packaging bottle, and evacuates the suspending agent remaining in the filling joint 320 in time after the filling is completed, so as to avoid the dripping of the suspending agent remaining inside the filling joint 320 before the docking of the packaging bottle is completed, causing pollution and waste of materials.

[0033] The filling joint 320 includes a joint housing 321, and the joint housing 321 is hermetically screwed on the outer side of the bottom of the main pipe 311. An annular groove 322 is coaxially fixed on the outer side of the joint housing 321, and the outer wall of the annular groove 322 is fixedly connected to the first air valve 323. A plurality of ventilation holes 324 are circumferentially formed on the inner wall of the annular groove 322, and the ventilation holes 324 communicate the joint housing 321 and the annular groove 322.

[0034] An inner ring 325 is coaxially fixed inside the joint housing 321. A plurality of through grooves 326 are circumferentially formed on the side wall of the inner ring 325. A connecting rod 327 is slidably arranged in some of the through grooves 326. The first end of the connecting rod 327 is fixed to the sealing ring 328, and the sealing ring 328 can block the ventilation holes 324. The other end of the connecting rod 327 is fixed to the outer surface of the sealing plug 329, and the sealing plug 329 is slidably arranged in the installation pipe 330, and the installation pipe 330 is fixedly installed inside the inner ring 325.

[0035] The inside of the installation pipe 330 is fixed to the first end of the compression spring 331. The second end of the compression spring 331 is fixed to the sealing plug 329, and the sealing plug 329 can be hermetically fitted to the bottom end of the sealing washer 315.

[0036] Among them, the first air valve 323 is fixedly communicated with the external air supply pipe. By controlling its opening and closing state, the first air valve 323 can introduce air flow into the annular groove 322 at a reasonable time to empty the suspending agent remaining in the joint housing 321.

[0037] Among them, the sealing washer 315 is arranged between the bottom end of the main pipe 311 and the inner ring 325, so as to ensure the sealed docking of the main pipe 311 and the joint housing 321 and prevent the leakage of the suspending agent.

[0038] Among them, the bottom end of the sealing washer 315 is provided with an inclined chamfer, and the top end of the sealing plug 329 is designed with a dome, which facilitates the hermetic fit of the top end of the sealing plug 329 and the bottom end of the sealing washer 315.

[0039] In this embodiment, through the above structure, the suspending agent remaining in the filling joint 320 can be emptied in time, avoiding the pollution caused by the dripping of the suspending agent. When filling the suspending agent, the suspending agent in the main pipe 311 flows downward through the sealing washer 315, thereby compressing the compression spring 331. The suspending agent flows downward through the gap between the sealing plug 329 and the sealing washer 315. At this time, the sealing plug 329 drives the sealing ring 328 to move downward synchronously through the connecting rod 327, so that the sealing ring 328 blocks the ventilation hole 324, that is, during the filling process of the suspending agent, air flow cannot enter the inside of the joint housing 321 through the ventilation hole 324.

[0040] After the filling of the suspending agent is completed, under the action of the elastic force of the compression spring 331, the sealing plug 329 moves upward and is hermetically fitted to the bottom end of the sealing washer 315. At this time, the sealing plug 329 drives the sealing ring 328 to move upward synchronously through the connecting rod 327, so that the sealing ring 328 no longer blocks the ventilation hole 324. The first air valve 323 opens, and the external air supply pipe transports gas to the annular groove 322 through the first air valve 323 and evenly transports it to the inside of the joint housing 321 to blow out the suspending agent remaining in the joint housing 321, thereby achieving the above technical effect.

[0041] The on-off part 340 includes a sleeve 341. The top of the side wall of the sleeve 341 is fixedly communicated with the second air valve 342, the bottom of the side wall of the sleeve 341 is fixedly communicated with the third air valve 343. A first piston 344 is hermetically and slidably arranged inside the sleeve 341. The second air valve 342 and the third air valve 343 are distributed on both sides of the first piston 344, and the second air valve 342 and the third air valve 343 are respectively fixedly communicated with the external air supply pipe.

[0042] When the second valve 342 is turned on, the pressure in the upper part of the sleeve 341 is greater than that in the lower part, causing the first piston 344 to slide downward. Conversely, when the third valve 343 is turned on, the pressure in the lower part of the sleeve 341 is greater than that in the upper part, causing the first piston 344 to slide upward.

[0043] The lower surface of the first piston 344 is fixedly connected to the first end of the connecting rod 345. The connecting rod 345 is hermetically and slidably arranged inside the sealing ring 346. The sealing ring 346 is hermetically fixed to the inner surface of the main pipe 311. The second end of the connecting rod 345 is fixedly connected to the plug column 314.

[0044] The inner space of the main pipe 311 and the sleeve 341 is hermetically separated by the sealing ring 346. The up and down movement of the first piston 344 drives the synchronous up and down movement of the plug column 314 through the connecting rod 345 fixed to it, realizing the driving of the up and down movement of the plug column 314.

[0045] As a further explanation of the above embodiment, see Figure 8 、 Figure 9 Inside the box body 101, a bin mechanism 400 and a conveying mechanism 500 are further installed. The bin mechanism 400 is installed above the conveying mechanism 500. The bin mechanism 400 includes a bin 401. The inside of the bin 401 is used to hold the suspending agent to be filled. On one side of the bottom of the bin 401, a feeding valve 402 is fixedly installed for supplementing the suspending agent into the bin 401. At one end of the bin 401, a driving motor 403 is fixedly installed. The driving motor 403 is drivingly connected to a stirring paddle 404 rotatably installed inside the bin 401 through a reduction device for driving the stirring paddle 404 to rotate inside the bin 401.

[0046] The bottom of the bin 401 is also fixedly communicated with the first end of a circulation pipe 405. The second end of the circulation pipe 405 is fixedly communicated with the top of the side surface of the bin 401. A circulation pump 406 is installed on the circulation pipe 405.

[0047] Structures composed of the circulation pipe 405 and the circulation pump 406 are uniformly distributed in multiple groups along the length direction of the bin 401, and this structure is symmetrically distributed on both sides of the bin 401.

[0048] By arranging a rotating stirring paddle 404 inside the bin 401, the sedimentation and aggregation of suspended particles in the suspending agent, which may cause uneven filling, are avoided. In addition, the circulation of the suspending agent is realized by using the circulation pipe 405 and the circulation pump 406, further achieving the uniformity of the suspending agent, and thus ensuring the uniformity of the filled products.

[0049] A number of output pipes 407 are uniformly and fixedly installed along the length direction of the bottom of the bin 401 for transporting the suspending agent in the bin 401 into the conveying mechanism 500.

[0050] The conveying mechanism 500 includes a rotating motor 501 which is fixedly installed inside the box body 101. The output end of the rotating motor 501 is coaxially fixed to one end of a screw rod 502. The screw rod 502 is in threaded connection with a nut 503. The nut 503 is fixedly installed on a driving plate 504. A number of guide tubes 505 are fixed on the driving plate 504. A second guide rod 506 is slidably arranged inside the guide tube 505. One end of the second guide rod 506 is fixed to a fixing plate 507.

[0051] A number of material suction barrels 508 are fixedly installed on the upper surface of the fixing plate 507. The top end of the material suction barrel 508 is fixedly communicated with the first port of a three-way valve 509. The second port of the three-way valve 509 is fixedly communicated with an output pipe 407. The third port of the three-way valve 509 is fixedly communicated with a feed pipe 313 through a hose.

[0052] The driving plate 504 is fixed to the first ends of a number of driving connecting rods 510. The second ends of the driving connecting rods 510 are fixed to a second piston 511. The second piston 511 is hermetically and slidably arranged inside the material suction barrel 508.

[0053] With the above structure of this embodiment, the output end of the rotating motor 501 can drive the up and down movement of the driving plate 504 through the threaded connection relationship between the screw rod 502 and the nut 503 and the sliding fit relationship between the second guide rod 506 and the guide tube 505. Further, the driving connecting rods 510 installed on the driving plate 504 drive the second piston 511 to move up and down along the material suction barrel 508. By cooperating with the on-off state of the three-way valve 509, the equal-volume conveying of the suspending agent contained in the bin 401 is realized, ensuring that the volume of the suspending agent conveyed each time is equal to the internal volume of the material suction barrel 508, and further realizing the uniformity of the filling volume of the filled product.

[0054] When the rotating motor 501 drives the driving plate 504 to move downward, the three-way valve 509 connects the first port and the second port. At this time, the suspending agent in the bin 401 enters the material suction barrel 508 through the output pipe 407. When the driving plate 504 moves to the bottommost position, the three-way valve 509 connects the first port and the third port. The rotating motor 501 starts to drive the driving plate 504 to move upward. At this time, the second piston 511 moves upward synchronously and pushes the suspending agent in the material suction barrel 508 through the hose to the filling pipe 310 to complete the filling.

[0055] By the above method, the volume of the suspending agent filled each time is equal to the volume of the material suction barrel 508, and the suspending agent in the material suction barrel 508 is ensured to be emptied by the way of piston extrusion. This method avoids the entry of external air into the filling path, thus minimizing the influence on the filling volume and maintaining the consistency of the filling volume.

[0056] In accordance with the embodiments of the present invention as described above, these embodiments do not exhaustively describe all the details and do not limit the invention to only the specific embodiments. Obviously, many modifications and variations can be made based on the above description. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and its modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A filling device for a suspending agent, characterized in that Comprising: A box body (101) with a square through hole opened on the side facing each other. A conveyor (102) is installed in the square through hole for conveying packaging containers to the filling position; A limiting mechanism (200), including a support frame (201), a telescopic electric cylinder (202) and a baffle (203). The telescopic electric cylinder (202) drives the baffle (203) to intermittently block the packaging containers on the conveyor (102) for positioning; A filling mechanism (300), including a linear motor (301). The linear motor (301) drives the mounting frame (302) to drive a plurality of filling pipes (310) to move up and down to dock with the packaging containers; A bin mechanism (400), including a bin (401) for storing suspension agents; A conveying mechanism (500), including a screw (502) and a suction bucket (508). The screw (502) drives a driving plate (504) to move up and down through a rotating motor (501). The suction bucket (508) is connected to the bin (401) and the filling pipes (310) through a three-way valve (509) to convey the suspension agent to the filling pipes (310) in equal volume; Wherein, the filling pipe (310) includes a main pipe (311), a on-off part (340) and a filling joint (320). The on-off part (340) drives a plug column (314) to open and close the feed pipe (313) of the main pipe (311) through air pressure. The filling joint (320) is provided with an annular groove (322), a ventilation hole (324) and a sealing ring (328) to remove the residual suspension agent through air flow.

2. The filling device according to claim 1, characterized in that, In the limiting mechanism (200), two sets of structures composed of the telescopic electric cylinder (202) and the baffle (203) are symmetrically distributed about the center of the support frame (201) for synchronously positioning a plurality of packaging containers.

3. The filling device according to claim 1, characterized in that The on-off part (340) includes a sleeve (341), a first piston (344) and a connecting rod (345). The sleeve (341) controls the air pressure to drive the first piston (344) through a second valve (342) and a third valve (343), and then drives the plug column (314) to open and close the feed pipe (313).

4. The filling device according to claim 1, characterized in that, The filling joint (320) further includes a sealing plug (329) and a compression spring (331). The sealing plug (329) is linked with the sealing ring (328) through a connecting rod (327), and the compression spring (331) drives the sealing plug (329) to reset to block the ventilation hole (324).

5. The filling device according to claim 1, characterized in that, The bin mechanism (400) further includes a stirring paddle (404) and a circulation pipe (405). The stirring paddle (404) is rotatably arranged in the bin (401). The circulation pipe (405) cooperates with a circulation pump (406) to realize the circulation of the suspension agent. The circulation pipes (405) are uniformly distributed in multiple groups along the length direction of the bin (401) and are symmetrically arranged on both sides.

6. The filling device according to claim 1, characterized in that, In the conveying mechanism (500), the suction bucket (508) is connected to a second piston (511) through a driving link (510). The second piston (511) slides in the suction bucket (508) to squeeze the suspension agent.

7. The filling device according to claim 6, characterized in that, When the drive plate (504) descends, the three-way valve (509) connects the silo (401) and the material suction bucket (508), and when it ascends, it switches to connect the material suction bucket (508) and the filling pipe (310).

8. The filling device according to claim 3, characterized in that, The sealing ring (346) seals and separates the internal space of the main pipe (311) and the sleeve (341), and the connecting rod (345) is hermetically and slidably arranged inside the sealing ring (346).

9. The filling device according to claim 1, characterized in that, The mounting bracket (302) is slidably connected to the guiding support (304) through the first guiding rod (303), and the guiding support (304) is fixed inside the box body (101).

10. The filling device according to claim 1, characterized in that, The conveying mechanism (500) further includes a guiding pipe (505) and a second guiding rod (506), and the guiding pipe (505) is slidably arranged on the second guiding rod (506) to limit the movement track of the drive plate (504).

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