Aseptic diaphragm filling mechanism

Abstract

An aseptic diaphragm filling mechanism solves the problems of poor sealing performance in the prior art, easy generation of fine debris during repeated pushing, easy contamination inside the piston cylinder, failure to reach a sterile state, affecting the filling quality, low food hygiene level, high operating failure rate, and reduced product production efficiency. It includes a base with a support frame arranged thereon, characterized in that: a filling cylinder is arranged on the support frame, a diaphragm sleeve is movably arranged inside the filling cylinder, and a front diaphragm sleeve is arranged at the front end of the diaphragm sleeve; a filling liquid storage cavity is arranged at the front end of the filling cylinder and in front of the front diaphragm sleeve; a filling connection end is arranged at the front of the filling liquid storage cavity of the filling cylinder, and a filling inlet and a filling outlet are respectively arranged on the filling connection end; the rear end of the diaphragm sleeve is connected to the driving part of the filling driving mechanism. It has a reasonable design, compact structure, high filling quantitative accuracy, good operating stability, low failure rate, convenient maintenance, and high food hygiene level.

Description

Technical Field

[0001] The invention belongs to the technical field of food packaging equipment, and specifically relates to an aseptic diaphragm filling mechanism with high filling quantitative accuracy, good operating stability, low failure rate, convenient maintenance and high food hygiene level. Background Art

[0002] The intermittent conveying and filling of liquid food during the packaging process is currently achieved through the reciprocating push of a pneumatic piston. However, the existing pneumatic pistons of ordinary structure have poor sealing performance, are prone to produce fine debris during long-term repeated pushing, and the inside of the piston cylinder is easily contaminated by the outside world and cannot reach a sterile state. These problems seriously affect the filling quality of liquid food and the food hygiene level is low. At the same time, the existing pneumatic piston mechanism has a high operating failure rate, poor reliability, and difficult maintenance, which reduces the production efficiency of the product. Therefore, it is necessary to improve the existing filling mechanism for liquid food packaging. Summary of the invention

[0003] The present invention aims at solving the above problems and provides an aseptic diaphragm filling mechanism with high filling quantitative accuracy, good operation stability, low failure rate, convenient maintenance and high food hygiene level.

[0004] The technical solution adopted by the present invention is: the aseptic diaphragm filling mechanism includes a base, on which a support frame is arranged, and is characterized in that: a filling cylinder is arranged on the support frame, a diaphragm sleeve is movably arranged inside the filling cylinder, and a front diaphragm sleeve is arranged at the front end of the diaphragm sleeve; a filling liquid storage cavity is arranged at the front end of the filling cylinder and in front of the front diaphragm sleeve; a filling connecting end is arranged at the front of the filling liquid storage cavity of the filling cylinder, and a filling inlet and a filling outlet are respectively arranged on the filling connecting end; the rear end of the diaphragm sleeve is connected to the driving part of the filling driving mechanism arranged on the base.

[0005] The diaphragm sleeve is composed of a middle cylinder, and the two ends of the middle cylinder are respectively provided with a front end cover and a rear end cover, and the rear end cover and the front end cover are connected through a sleeve core rod located inside the middle cylinder. The front end cover, the rear end cover and the sleeve core rod are used to form a split assembly type diaphragm sleeve, thereby reducing the overall weight of the sleeve and facilitating the installation and maintenance of the device.

[0006] The middle cylinder body includes a cylindrical cylinder section, and conical cylinder sections are respectively provided at both ends of the cylindrical cylinder section, and the diameter of the outer port of the conical cylinder section is smaller than the diameter of the inner port; a cylinder cavity is provided through the middle of the cylindrical cylinder section and the conical cylinder section. The structure of the middle cylinder body being wide in the middle and narrow at both ends facilitates the reciprocating movement of the diaphragm sleeve inside the filling cylinder body, and ensures the smoothness of the front diaphragm sleeve during the movement of the diaphragm sleeve.

[0007] The front end cover is composed of a front end cover body, a core rod front end connection hole is provided in the middle of the front end cover body, and a cylinder pressing flange provided at the end side of the front end cover body is connected to the end cover pressing bevel edge at the end edge of the middle cylinder body; the rear end cover is composed of a rear end cover body, a core rod rear end connection hole is provided in the middle of the rear end cover body, and a cylinder pressing flange provided at the end side of the rear end cover body is connected to the end cover pressing bevel edge at the end edge of the middle cylinder body. The cylinder pressing flange at the end side is used to press the front end cover and the rear end cover on the end cover pressing bevel edge at the openings at both ends of the middle cylinder body, respectively, thereby improving the smoothness of the edge joint of the split assembly diaphragm sleeve.

[0008] The sleeve core rod is composed of a core rod body, the front end of the core rod body is provided with a front cover connecting part, and the rear end of the core rod body is provided with a rear cover connecting part; and the rear cover connecting part is also provided with an internal thread connecting hole, and correspondingly, a screw through hole is also provided in the core rod rear end connecting hole of the rear end cover; the front cover connecting part of the sleeve core rod is connected to the core rod front end connecting hole of the front end cover, and the rear cover connecting part of the sleeve core rod is connected to the core rod rear end connecting hole of the rear end cover through a core rod fixing screw passing through the screw through hole. The split assembled diaphragm sleeve is connected as one body by the sleeve core rod whose two ends are respectively connected to the core rod front end connecting hole of the front end cover and the core rod rear end connecting hole of the rear end cover, and at the same time, the structural stability of the diaphragm sleeve is increased.

[0009] The front diaphragm sleeve comprises a cylindrical front diaphragm sleeve body, a sleeve sleeve cavity is arranged inside the cylindrical front diaphragm sleeve body, the front end of the diaphragm sleeve extends into the sleeve sleeve cavity of the front diaphragm sleeve body, and the front end of the diaphragm sleeve is connected to the front end cover connection part of the front end of the front diaphragm sleeve body; the rear end of the front diaphragm sleeve body is provided with a front diaphragm sleeve eversion section extending to the front end of the front diaphragm sleeve body, and the end of the front diaphragm sleeve eversion section is provided with a front diaphragm sleeve opening edge for connecting to the inner side of the front end of the filling cylinder. The opening end of the front diaphragm sleeve is fixedly connected to the inner side of the front end of the filling cylinder by using the clamping flange arranged on the opening edge of the front diaphragm sleeve; and the front end cover connection part of the front end of the front diaphragm sleeve body is connected to the front end cover of the diaphragm sleeve by vacuum adsorption, bolt fixing, integral casting or hot pressing forming, so that the soft front diaphragm sleeve reciprocates with the diaphragm sleeve, thereby taking back the liquid food in the filling liquid storage cavity at the front end of the filling cylinder body and pushing out the filling action.

[0010] The rear end of the diaphragm sleeve movably arranged inside the filling cylinder is provided with a rear diaphragm sleeve, and a driving isolation cavity is provided at the rear end of the filling cylinder and behind the rear diaphragm sleeve. The rear diaphragm sleeve arranged at the rear end of the diaphragm sleeve is used to form a driving isolation cavity in the space at the rear end of the filling cylinder, thereby effectively preventing dust and debris on one side of the filling drive mechanism from being deposited into the filling cylinder during long-term use, thereby affecting the normal operation of the diaphragm sleeve.

[0011] The rear diaphragm sleeve comprises a cylindrical rear sleeve body, a sleeve sleeve cavity is arranged inside the cylindrical rear sleeve body, the rear end of the diaphragm sleeve extends into the sleeve sleeve cavity of the rear sleeve body, and the rear end of the diaphragm sleeve is connected to the rear end cover connection part of the front end of the rear sleeve body; the rear end of the rear sleeve body is provided with a rear sleeve outward section extending to the front end of the rear sleeve body, and the end of the rear sleeve outward section is provided with a rear sleeve opening edge for connecting with the inner side of the rear end of the filling cylinder. The opening end of the rear diaphragm sleeve is fixedly connected with the inner side of the rear end of the filling cylinder by using the clamping flange arranged on the opening edge of the rear sleeve; at the same time, the rear end cover connection part of the front end of the rear sleeve body is connected with the rear end cover of the diaphragm sleeve by bolt fixing, vacuum adsorption, integral casting or hot pressing, so that the soft rear diaphragm sleeve moves back and forth with the diaphragm sleeve, effectively closing the driving isolation cavity at the rear end of the filling cylinder.

[0012] The front diaphragm sleeve and the rear diaphragm sleeve at both ends of the diaphragm sleeve enclose the middle of the inner cavity of the filling cylinder to form a vacuum space, and the vacuum space is connected to the vacuum generating device through the vacuum connecting port provided on the cylinder wall of the filling cylinder. By using a vacuum generating device such as a vacuum pump, the inner cavity space between the front diaphragm sleeve and the rear diaphragm sleeve in the filling cylinder is pumped into a vacuum space in a negative pressure state through the vacuum connecting port on the cylinder wall of the filling cylinder, thereby facilitating the close fit between the front diaphragm sleeve and the rear diaphragm sleeve and the outer wall of the diaphragm sleeve and the inner wall of the filling cylinder, thereby improving the accuracy of the filling amount.

[0013] A plurality of groups of cylinder vacuum through holes are arranged on the cylinder wall of the diaphragm sleeve in the vacuum space inside the filling cylinder. Through the cylinder vacuum through holes on the cylinder wall of the diaphragm sleeve, the negative pressure in the vacuum space formed between the front diaphragm sleeve and the rear diaphragm sleeve is made more uniform and constant, thereby ensuring the fitting effect of the diaphragm sleeves at both ends of the diaphragm sleeve.

[0014] The beneficial effects of the present invention are as follows: since the present invention adopts a base on which a support frame is arranged, a filling cylinder is arranged on the base support frame, a diaphragm sleeve is movably arranged inside the filling cylinder, and a front diaphragm sleeve is arranged at the front end of the diaphragm sleeve; a filling liquid storage cavity is arranged at the front end of the filling cylinder and in front of the front diaphragm sleeve; a filling connecting end is arranged at the front of the filling liquid storage cavity of the filling cylinder, and a filling inlet and a filling outlet are respectively arranged on the filling connecting end; the rear end of the diaphragm sleeve is connected to the driving part of the filling driving mechanism, so it has a reasonable design, compact structure, high filling quantitative accuracy, good operation stability of the mechanism, low failure rate, can effectively improve production efficiency, convenient and quick maintenance, good filling product quality, and high food hygiene level. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a structural schematic diagram of the present invention.

[0016] Figure 2 yes Figure 1 Cross-sectional view of the internal structure (the diaphragm sleeve is in the pushed-out filling state).

[0017] Figure 3 yes Figure 2 A structural schematic diagram of the diaphragm sleeve in FIG.

[0018] Figure 4 yes Figure 3 A cross-sectional view of the internal structure.

[0019] Figure 5 yes Figure 3 A structural schematic diagram of the middle cylinder in FIG.

[0020] Figure 6 yes Figure 3 A structural schematic diagram of the front end cover in FIG.

[0021] Figure 7 yes Figure 6 A cross-sectional view of the internal structure.

[0022] Figure 8 yes Figure 3 A structural schematic diagram of the rear end cover in FIG.

[0023] Fig. 9 yes Figure 8 A cross-sectional view of the internal structure.

[0024] Fig.10 yes Figure 4 A structural schematic diagram of the sleeve core rod in FIG.

[0025] Fig.11 yes Figure 2 A schematic diagram of the structure of the front diaphragm sleeve in FIG.

[0026] Fig.12 yes Fig.11 A cross-sectional view of the internal structure.

[0027] Fig.13 yes Figure 2 A schematic diagram of the structure of the rear diaphragm sleeve.

[0028] Fig.14 yes Fig.13 A cross-sectional view of the internal structure.

[0029] Fig.15 yes Figure 2 A schematic diagram of a usage state in which the telescopic rod of the filling drive mechanism drives the diaphragm sleeve to retract and absorb material.

[0030] Fig.16yes Fig.15 A schematic diagram of a usage state in which the telescopic rod pushes the diaphragm sleeve out for filling.

[0031] Explanation of the numbers in the figure: 1 base, 2 support frame, 3 filling cylinder, 4 vacuum connection port, 5 filling connection end, 6 filling outlet, 7 filling inlet, 8 filling drive mechanism, 9 visual window, 10 telescopic rod, 11 diaphragm cylinder connection plate, 12 diaphragm sleeve, 13 front diaphragm sleeve, 14 rear diaphragm sleeve, 15 vacuum space, 16 filling liquid storage chamber, 17 drive isolation chamber, 18 front spacer opening edge, 19 rear spacer opening edge, 20 middle cylinder, 21 front end cover, 22 rear end cover, 23 cylinder vacuum through hole, 24 front end cover vacuum through hole, 25 positioning groove, 26 sleeve core rod , 27 core rod fixing screws, 28 cylindrical barrel section, 29 conical barrel section, 30 barrel cavity, 31 end cover pressing bevel edge, 32 front end cover body, 33 core rod front end connecting hole, 34 barrel pressing flange, 35 rear end cover body, 36 core rod rear end connecting hole, 37 connecting plate mounting hole, 38 screw through hole, 39 core rod body, 40 front cover connecting part, 41 rear cover connecting part, 42 internal thread connecting hole, 43 front spacer body, 44 front end cover connecting part, 45 front spacer eversion section, 46 sleeve sleeve cavity, 47 clamping flange, 48 rear spacer body, 49 rear spacer eversion section, 50 rear end cover connecting part. DETAILED DESCRIPTION

[0032] according to Figures 1 to 16 The specific structure of the present invention is described in detail. The aseptic diaphragm filling mechanism includes a base 1 on which a support frame 2 is arranged, and a filling cylinder 3 arranged horizontally is arranged on the support frame 2 of the base 1; a retractable diaphragm sleeve 12 is movably arranged inside the filling cylinder 3. The diaphragm sleeve 12 is composed of a middle cylinder 20 with a hollow structure, and a front end cover 21 and a rear end cover 22 are respectively arranged at the openings at both ends of the middle cylinder 20. The middle cylinder 20 of the diaphragm sleeve 12 includes a cylindrical barrel section 28, and conical barrel sections 29 are respectively arranged at both ends of the cylindrical barrel section 28, and the diameter of the outer port of the conical barrel section 29 is smaller than the diameter of the inner port; and a barrel cavity 30 is arranged through the middle of the cylindrical barrel section 28 in the middle and the conical barrel sections 29 at both ends. Thus, the structure of the middle cylinder 20 being wide in the middle and narrow at both ends facilitates the reciprocating motion of the diaphragm sleeve 12 inside the filling cylinder 3 and ensures the smoothness of the front diaphragm sleeve 13 and the rear diaphragm sleeve 14 during the movement of the diaphragm sleeve 12 .

[0033] The front end cover 21 on the diaphragm sleeve 12, which faces the filling connection end 5, is composed of a front end cover body 32, a core rod front end connection hole 33 is provided in the middle of the front end cover body 32, and a cylinder pressing flange 34 provided on the end side of the front end cover body 32 is connected to the end cover pressing bevel 31 at the edge of the front end of the middle cylinder 20. In addition, the front end cover body 32 of the front end cover 21 is also provided with a positioning groove 25 and a front end cover vacuum through hole 24 for positioning and adsorbing the front end cover connection part 44 of the front diaphragm sleeve 13 on the front end cover 21. The rear end cover 22 of the diaphragm sleeve 12 is composed of a rear end cover body 35, and a core rod rear end connecting hole 36 is provided in the middle of the rear end cover body 35. The cylinder pressing flange 34 provided on the end side of the rear end cover body 35 is connected to the end cover pressing bevel edge 31 at the edge of the rear end of the middle cylinder 20; the cylinder pressing flange 34 on the end side is used to press the front end cover 21 and the rear end cover 22 on the end cover pressing bevel edge 31 at the openings at both ends of the middle cylinder 20, respectively, to improve the smoothness of the edge joint of the split assembled diaphragm sleeve 12, and effectively reduce the friction loss of the front diaphragm sleeve 13 and the rear diaphragm sleeve 14 during the movement with the diaphragm sleeve 12.

[0034] In addition, the rear end cover 22 and the front end cover 21 are connected through the sleeve core rod 26 located inside the barrel cavity 30 of the middle barrel 20. The sleeve core rod 26 is composed of a core rod body 39, and a front cover connecting portion 40 is provided at the front end of the core rod body 39, and a rear cover connecting portion 41 is provided at the rear end of the core rod body 39. At the same time, the rear cover connecting portion 41 of the core rod body 39 is also provided with an internal thread connecting hole 42; correspondingly, a screw through hole 38 is provided in the core rod rear end connecting hole 36 of the rear end cover 22. The front cover connecting portion 40 of the sleeve core rod 26 is connected to the core rod front end connecting hole 33 of the front end cover 21, and the rear cover connecting portion 41 of the sleeve core rod 26 is connected to the core rod rear end connecting hole 36 of the rear end cover 22 through the core rod fixing screw 27 passing through the screw through hole 38. The split assembled diaphragm sleeve 12 is connected as a whole by a sleeve core rod 26 which is respectively connected to the core rod front end connecting hole 33 of the front end cover 21 and the core rod rear end connecting hole 36 of the rear end cover 22 at both ends. While reducing the overall weight of the sleeve, the structural stability of the diaphragm sleeve 12 is increased and the installation and maintenance of the device are facilitated.

[0035] A diaphragm tube connection plate 11 is also provided on the outside of the rear end cover 22 of the diaphragm sleeve 12, and the diaphragm tube connection plate 11 is installed in the connection plate installation hole 37 of the rear end cover 22 through connecting bolts; at the same time, the diaphragm tube connection plate 11 also presses the rear end cover connection part 50 of the rear diaphragm sleeve 14 onto the rear end cover 22. In addition, the diaphragm tube connection plate 11 on the rear end cover 22 of the diaphragm sleeve 12 is also connected to the front end of the telescopic rod 10 of the filling drive mechanism 8 (for example, it can be an electric push rod or a cylinder) arranged laterally on the base 1.

[0036] A soft front diaphragm sleeve 13 is provided at the front end of the diaphragm sleeve 12 and the inner side of the front part of the filling cylinder 3. The front diaphragm sleeve 13 is composed of a cylindrical front diaphragm sleeve body 43 made of sterile silicone, and a sleeve sleeve cavity 46 is provided inside the cylindrical front diaphragm sleeve body 43; the front end of the diaphragm sleeve 12 extends into the sleeve sleeve cavity 46 of the front diaphragm sleeve body 43, and the front end cover 21 of the front end of the diaphragm sleeve 12 is connected to the front end cover connection part 44 of the front end of the front diaphragm sleeve body 43. The rear end of the front diaphragm sleeve body 43 is provided with a front diaphragm sleeve eversion section 45 extending to the front end of the front diaphragm sleeve body 43, and the end of the front diaphragm sleeve eversion section 45 is provided with a front diaphragm sleeve opening edge 18 for connecting with the inner side of the front end of the filling cylinder 3, and the front diaphragm sleeve opening edge 18 is clamped at the joint between the front end of the filling cylinder 3 and the rear end of the filling connection terminal 5 through the clamping flange 47 provided thereon.

[0037] A filling liquid storage chamber 16 for temporarily storing the suction material is provided at the front end of the filling cylinder 3 and in front of the front diaphragm sleeve 13. A filling connection terminal 5 is provided at the front of the filling liquid storage chamber 16 of the filling cylinder 3, and a filling material inlet 7 and a filling material outlet 6 are provided on the filling connection terminal 5 respectively; a visual window 9 is also provided on the side wall of the filling connection terminal 5. Then, the opening end of the front diaphragm sleeve 13 is fixedly connected with the inner side of the front end of the filling cylinder 3 by using the clamping flange 47 provided on the opening edge 18 of the front diaphragm sleeve, and the front end cover connection part 44 of the front end of the front diaphragm sleeve body 43 is connected with the front end cover 21 of the diaphragm sleeve 12 by vacuum adsorption, bolt fixing, integral casting or hot pressing forming, so that the soft front diaphragm sleeve 13 reciprocates with the diaphragm sleeve 12, and the liquid food in the filling liquid storage chamber 16 at the front end of the filling cylinder 3 is withdrawn and sucked and pushed out for filling.

[0038] A soft rear diaphragm sleeve 14 is also provided at the rear end of the diaphragm sleeve 12 movably provided inside the filling cylinder 3. The rear diaphragm sleeve 14 includes a cylindrical rear diaphragm sleeve body 48 made of sterile silicone, and a sleeve sleeve cavity 46 is provided inside the cylindrical rear diaphragm sleeve body 48. The rear end of the diaphragm sleeve 12 extends into the sleeve sleeve cavity 46 of the rear diaphragm sleeve body 48; and the rear end cover 22 at the rear end of the diaphragm sleeve 12 is connected to the rear end cover connection part 50 at the front end of the rear diaphragm sleeve body 48. The rear end of the rear diaphragm sleeve body 48 is provided with a rear diaphragm sleeve outward section 49 extending to the front end of the rear diaphragm sleeve body 48, and the end of the rear diaphragm sleeve outward section 49 is provided with a rear diaphragm sleeve opening edge 19 for connecting with the inner side of the rear end of the filling cylinder 3. The rear diaphragm sleeve opening edge 19 is clamped at the joint between the rear end of the filling cylinder 3 and the front side of the support frame 2 through the clamping flange 47 provided thereon. A driving isolation chamber 17 is provided at the rear end of the filling cylinder 3 and behind the rear diaphragm sleeve 14; the opening end of the rear diaphragm sleeve 14 is fixedly connected to the inner side of the rear end of the filling cylinder 3 by using the clamping flange 47 provided on the opening edge 19 of the rear diaphragm sleeve. At the same time, the rear end cover connecting part 50 at the front end of the rear diaphragm sleeve body 48 is connected to the rear end cover 22 of the diaphragm sleeve 12 by bolting, vacuum adsorption, integral casting or hot pressing, so that the soft rear diaphragm sleeve 14 can reciprocate with the diaphragm sleeve 12, effectively sealing the driving isolation chamber 17 formed by the rear diaphragm sleeve 14 in the rear end space of the filling cylinder 3, and effectively preventing the dust and debris on one side of the filling drive mechanism 8 from being deposited into the filling cylinder 3 and affecting the normal operation of the diaphragm sleeve 12 during long-term use.

[0039] The front diaphragm sleeve 13 and the rear diaphragm sleeve 14 located inside the filling cylinder 3 and at both ends of the diaphragm sleeve 12 enclose the middle of the inner cavity of the filling cylinder 3 to form a closed vacuum space 15; the vacuum space 15 is connected to a vacuum generating device such as a vacuum pump through a vacuum connecting port 4 provided on the wall of the filling cylinder 3. The vacuum generating device is used to pump the inner cavity space between the front diaphragm sleeve 13 and the rear diaphragm sleeve 14 in the filling cylinder 3 into a vacuum space 15 in a negative pressure state through the vacuum connecting port 4 on the wall of the filling cylinder 3, thereby facilitating the close fit between the front diaphragm sleeve 13 and the rear diaphragm sleeve 14 and the outer wall of the diaphragm sleeve 12 and the inner wall of the filling cylinder 3, thereby improving the accuracy of the filling amount. It can be understood that, according to specific usage requirements, in order to ensure the fitting effect of the front diaphragm sleeve 13 and the rear diaphragm sleeve 14 at both ends of the diaphragm sleeve 12, a plurality of groups of cylinder vacuum through holes 23 are provided on the cylinder wall of the middle cylinder 20 of the diaphragm sleeve 12 located in the vacuum space 15 inside the filling cylinder 3; and then, through the cylinder vacuum through holes 23 on the cylinder wall of the diaphragm sleeve 12, the negative pressure in the vacuum space 15 formed between the front diaphragm sleeve 13 and the rear diaphragm sleeve 14 is made more uniform and constant.

[0040] When the aseptic diaphragm filling mechanism is used, first, the liquid food enters the filling connection end 5 through the opened filling inlet 7, and the filling outlet 6 is temporarily closed. Then, the telescopic rod 10 of the filling drive mechanism 8 is retracted to drive the diaphragm sleeve 12 inside the filling cylinder 3 and the front diaphragm sleeve 13 at its front end to move backward together, and then the liquid food entering from the filling inlet 7 is quantitatively sucked into the filling liquid storage cavity 16 at the front end of the filling cylinder 3 (such as Fig.15 After that, the filling outlet 6 is opened, and the filling inlet 7 is closed, and the telescopic rod 10 of the filling drive mechanism 8 is extended forward, thereby driving the diaphragm sleeve 12 and the front diaphragm sleeve 13 at the front end thereof to move forward, so as to push out a certain amount of liquid food (such as Fig.16 Then, a certain amount of liquid food enters the filling and conveying pipeline through the filling outlet 6 for subsequent liquid food packaging operations.

Claims

1. An aseptic diaphragm filling mechanism, comprising a base (1), a support frame (2) being arranged on the base (1), characterized in that: The support frame (2) is provided with a filling cylinder (3), a diaphragm sleeve (12) is movably provided inside the filling cylinder (3), and a front diaphragm sleeve (13) is provided at the front end of the diaphragm sleeve (12); a filling liquid storage chamber (16) is provided at the front end of the filling cylinder (3) and in front of the front diaphragm sleeve (13); a filling connection terminal (5) is provided at the front of the filling liquid storage chamber (16) of the filling cylinder (3), and a filling material inlet (7) and a filling material outlet (6) are provided on the filling connection terminal (5); the rear end of the diaphragm sleeve (12) is connected to a driving portion of a filling driving mechanism (8) provided on the base (1); the diaphragm sleeve (12) is provided with a filling material inlet (7) and a filling material outlet (6) at the front end of the filling cylinder (3); 2) is composed of a middle cylinder (20), wherein the two ends of the middle cylinder (20) are respectively provided with a front end cover (21) and a rear end cover (22), and the rear end cover (22) and the front end cover (21) are connected via a sleeve core rod (26) located inside the middle cylinder (20); the front end cover (21) is also provided with a positioning groove (25) and a front end cover vacuum through hole (24) for positioning and adsorbing the front diaphragm sleeve (13) on the front end cover (21); the front diaphragm sleeve (13) includes a cylindrical front diaphragm sleeve body (43), the interior of the cylindrical front diaphragm sleeve body (43) is provided with a sleeve sleeve cavity (46), and the front end of the diaphragm sleeve (12) extends The front spacer sleeve (43) is inserted into the sleeve sleeve cavity (46) of the front spacer sleeve body (43), and the front end of the diaphragm sleeve (12) is connected to the front end cover connecting portion (44) of the front end of the front spacer sleeve body (43); the rear end of the front spacer sleeve body (43) is provided with a front spacer sleeve outward-turned section (45) extending toward the front end of the front spacer sleeve body (43), and the end of the front spacer sleeve outward-turned section (45) is provided with a front spacer sleeve opening edge (18) for connecting to the inner side of the front end of the filling cylinder (3); the rear end of the diaphragm sleeve (12) movably arranged inside the filling cylinder (3) is provided with a rear diaphragm sleeve (14), and the rear end of the filling cylinder (3) and the rear of the rear diaphragm sleeve (14) are provided with a drive isolation cavity (17); the rear diaphragm sleeve (14) comprises a cylindrical rear spacer sleeve body (48), the interior of the cylindrical rear spacer sleeve body (48) is provided with a sleeve sleeve cavity (46), the rear end of the diaphragm sleeve (12) extends into the sleeve sleeve cavity (46) of the rear spacer sleeve body (48), and the rear end of the diaphragm sleeve (12) is connected to the rear end cover connecting portion (50) at the front end of the rear spacer sleeve body (48); the rear end of the rear spacer sleeve body (48) is provided with a rear spacer outer eversion section (49) extending toward the front end of the rear spacer sleeve body (48), and the end of the rear spacer outer eversion section (49) is provided with a rear spacer opening edge (19) for connecting to the inner side of the rear end of the filling cylinder (3);The front diaphragm sleeve (13) and the rear diaphragm sleeve (14) at both ends of the diaphragm sleeve (12) enclose the middle of the inner cavity of the filling cylinder (3) to form a vacuum space (15), and the vacuum space (15) is connected to the vacuum generating device through a vacuum connection port (4) provided on the cylinder wall of the filling cylinder (3); a plurality of groups of cylinder vacuum through holes (23) are provided on the cylinder wall of the diaphragm sleeve (12) in the vacuum space (15) inside the filling cylinder (3). ; 2. The aseptic diaphragm filling mechanism according to claim 1, characterized in that: The middle cylinder body (20) comprises a cylindrical cylinder section (28), and conical cylinder sections (29) are respectively arranged at both ends of the cylindrical cylinder section (28), and the diameter of the outer port of the conical cylinder section (29) is smaller than the diameter of the inner port; and a cylinder cavity (30) is arranged through the middle of the cylindrical cylinder section (28) and the conical cylinder section (29).

3. The aseptic diaphragm filling mechanism according to claim 1, characterized in that: The front end cover (21) is composed of a front end cover body (32), a core rod front end connection hole (33) is provided in the middle of the front end cover body (32), and a cylinder pressing flange (34) provided on the end side of the front end cover body (32) is connected to an end cover pressing bevel edge (31) at the end edge of the middle cylinder (20); the rear end cover (22) is composed of a rear end cover body (35), a core rod rear end connection hole (36) is provided in the middle of the rear end cover body (35), and a cylinder pressing flange (34) provided on the end side of the rear end cover body (35) is connected to an end cover pressing bevel edge (31) at the end edge of the middle cylinder (20).

4. The aseptic diaphragm filling mechanism according to claim 3, characterized in that: The sleeve core rod (26) is composed of a core rod body (39), the front end of the core rod body (39) is provided with a front cover connecting portion (40), and the rear end of the core rod body (39) is provided with a rear cover connecting portion (41); and the rear cover connecting portion (41) is also provided with an internal thread connecting hole (42), and correspondingly, a screw through hole (38) is also provided in the core rod rear end connecting hole (36) of the rear end cover (22); the front cover connecting portion (40) of the sleeve core rod (26) is connected to the core rod front end connecting hole (33) of the front end cover (21), and the rear cover connecting portion (41) of the sleeve core rod (26) is connected to the core rod rear end connecting hole (36) of the rear end cover (22) via a core rod fixing screw (27) passing through the screw through hole (38).

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