Dynamic seal structure for a vacuum environment

Abstract

The utility model discloses a dynamic sealing structure for vacuum environment, including sealed support subassembly, sealed support subassembly sets up in the through -hole inside the first plug -in chamber and is opened, and first plug -in rod is through sealed support subassembly, and the outer wall is with sealed support subassembly inside slide connection, realizes to the dynamic sealing of plugging. Sealed support subassembly includes first sealed support, and first sealed support is the trumpet mouth pipe body, and the trumpet mouth pipe body outer wall upper end sets up the upper notch, and the middle part sets up the middle notch, and the lower end sets up the lower notch. Sealed support subassembly still includes first sealed support upper sealing washer, first sealed support middle sealing washer and first sealed support lower sealing washer, and first sealed support upper sealing washer is connected in the upper notch, and the utility model discloses a purpose in overcoming the defect of current and provides a dynamic sealing structure for vacuum environment, satisfies the requirement of linear motion dynamic sealing.

Description

Technical Field

[0001] This utility model relates to a dynamic sealing structure for use in a vacuum environment. Background Technology

[0002] The dynamic sealing structure is mainly used in the aseptic filling production line of the pharmaceutical industry, in the vacuum filling and vacuum stoppering processes. It ensures that the equipment can be reused repeatedly without affecting the dynamic seal, thereby improving the stability of the equipment and reducing the customer's operating costs.

[0003] like Figure 5 As shown, taking the vacuum plugging process as an example, the core components of vacuum plugging include a plugging rod 12, a sealing ring cover plate 13, a first sealing ring 14, a plugging cavity 15, a guide sleeve 16, a second sealing ring 18, a silicone nozzle bracket 19, and a silicone nozzle 20. The silicone nozzle bracket 19 is bolted to the plugging cavity 15. Because the silicone nozzle has a certain degree of elasticity, it can be installed onto the outer edge protrusion of the silicone nozzle bracket 19 via an interference fit. During vacuum stoppering, after the stoppering rod 12 removes the rubber stopper from the stoppering arm, it rises to the set height. Then, the stoppering rod 12 and the stoppering cavity 15 descend in parallel. The silicone suction nozzle 20 descends synchronously with the stoppering cavity 15 to the set height until the pleated edge at the bottom of the silicone suction nozzle 20 adheres to the upper surface of the syringe glass bottle 11, thereby isolating and sealing the interior of the cavity, the interior of the glass bottle, and the external environment. The isolation and sealing between the stoppering rod and the external environment is mainly achieved by the lip contraction sealing edge of the first sealing ring 14 to achieve dynamic sealing. The existing material is mainly food-grade polyurethane, which can withstand a long-term temperature of 110℃ and a short-term temperature of 121℃. The existing lip sealing ring type must have good wear resistance (it cannot jam, otherwise it will easily cause motor torque overload alarm), good resistance to moist heat sterilization, and good elasticity. There is no relevant material that can meet all three requirements at the same time without changing the lip structure. Moreover, the existing material has low reusability and needs to be replaced in batches after 1-2 batches of use.

[0004] Therefore, a dynamic sealing structure for use in a vacuum environment is proposed to address the above problems. Utility Model Content

[0005] The purpose of this invention is to overcome the existing defects and provide a dynamic sealing structure for use in a vacuum environment, which meets the requirements of dynamic sealing for linear motion.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dynamic sealing structure for a vacuum environment, comprising a sealing support assembly; the sealing support assembly is disposed in a through hole opened inside a first plugging chamber, a first plugging rod passes through the sealing support assembly, and the outer wall is slidably connected to the inside of the sealing support assembly to achieve dynamic sealing of the plugged material.

[0007] Preferably, the sealing bracket assembly includes a first sealing bracket, which is a flared tube. The upper end of the outer wall of the flared tube has an upper groove, the middle part has a middle groove, and the lower end has a lower groove.

[0008] Preferably, the sealing bracket assembly further includes an upper sealing ring, a middle sealing ring, and a lower sealing ring; the upper sealing ring is connected to the upper groove; the middle sealing ring is connected to the middle groove; and the lower sealing ring is connected to the lower groove.

[0009] The outer walls of the sealing ring in the first sealing bracket and the lower sealing ring of the first sealing bracket are in contact with the inner wall of the through hole inside the first plugging chamber.

[0010] Preferably, it further includes a first guide sleeve, which is located at the upper port of the through hole inside the first plugging chamber, and the lower end of the first guide sleeve is pressed against the upper end of the flared tube body.

[0011] Preferably, it further includes a first stopper rod cover plate, which is connected to the upper end of the first stopper chamber and the lower end face is pressed against the first guide sleeve.

[0012] Preferably, the first sealing bracket is made of PTFE or PEEK material.

[0013] Preferably, a groove is formed at the lower end of the through hole inside the first plugging chamber, and a first silicone suction nozzle is connected inside the groove.

[0014] Preferably, a boss is provided on the outer wall of the flared tube between the middle groove and the lower groove.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: The dynamic sealing structure for vacuum environments, by setting a sealing support assembly within a through hole in the first stopper chamber, with the first stopper rod passing through the sealing support assembly and its outer wall slidably connected to the inside of the sealing support assembly, achieves dynamic sealing of the stopper. This simultaneously seals both radial and axial directions. The first sealing support and the three sealing rings are all made of high-temperature resistant food-grade material, capable of withstanding multiple high-temperature and moist heat sterilizations. While ensuring a tight seal, this increases the usability of the sealing components and reduces customer operating costs. It satisfies the requirements of linear motion dynamic sealing while increasing the reusability of the entire stopper chamber assembly after sterilization, thus improving the stability of the vacuum stoppering or vacuum filling process. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is an isometric view of the dynamic sealing structure for vacuum environment of this utility model;

[0018] Figure 2 This is an exploded view of the dynamic sealing structure for use in a vacuum environment according to this utility model;

[0019] Figure 3 This is a cross-sectional view of the dynamic sealing structure for vacuum environments according to this utility model;

[0020] Figure 4 This is a detailed drawing of the first sealing bracket of this utility model;

[0021] Figure 5 This is a schematic diagram of existing technology.

[0022] In the figure: 1. First stopper rod; 2. First stopper rod cover plate; 3. First guide sleeve; 4. Upper sealing ring of the first sealing bracket; 5. Middle sealing ring of the first sealing bracket; 6. First sealing bracket; 7. Lower sealing ring of the first sealing bracket; 8. First stopper chamber; 9. First silicone suction nozzle; 10. Rubber stopper; 11. Syringe glass bottle; 61. Flared mouth tube body; 62. Upper groove; 63. Middle groove; 64. Lower groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the existing linear motion sealing technology, the upper lip of the first sealing ring 14 mainly relies on the pressure of the upper lip of the first sealing ring 14. When the external pressure is greater than the internal pressure, the upper lip of the first sealing ring 14 contacts the outer surface of the plug rod. The existing material is food-grade polyurethane. After repeated high-temperature and humid heat sterilization, the upper lip will experience fatigue wear, elasticity failure, and poor sealing effect.

[0025] like Figure 1-4 As shown, a dynamic sealing structure for a vacuum environment includes a sealing support assembly; the sealing support assembly is disposed in a through hole opened inside a first plugging chamber 8, a first plugging rod 1 passes through the sealing support assembly, and the outer wall is slidably connected to the inside of the sealing support assembly to achieve dynamic sealing of the plugged part.

[0026] Specifically, the sealing bracket assembly includes a first sealing bracket 6, which is a flared tube body 61. The upper end of the outer wall of the flared tube body 61 has an upper groove 62, the middle part has a middle groove 63, and the lower end has a lower groove 64. A boss is provided between the upper middle groove 63 and the lower groove 64 on the outer wall of the flared tube body 61.

[0027] Specifically, the sealing bracket assembly also includes an upper sealing ring 4, a middle sealing ring 5, and a lower sealing ring 7 of the first sealing bracket; the upper sealing ring 4 is connected to the upper groove 62; the middle sealing ring 5 is connected to the middle groove 63; the lower sealing ring 7 is connected to the lower groove 64; the outer walls of the middle sealing ring 5 and the lower sealing ring 7 are fitted with the inner wall of the through hole inside the first plugging chamber 8.

[0028] Specifically, the sealing is mainly achieved through the first sealing bracket 6, the upper sealing ring 4 of the first sealing bracket, the middle sealing ring 5 of the first sealing bracket, and the lower sealing ring 7 of the first sealing bracket. The upper sealing ring 4 of the first sealing bracket is installed inside the upper groove 62. The overall shape of the flared tube body 61 is a flared shape, smaller at the top and larger at the bottom, and it is made of PTFE or PEEK. These two materials have better wear resistance than polyurethane and can withstand moist heat sterilization at 121℃. This ensures that the wear resistance is not affected after repeated sterilization.

[0029] Specifically, it also includes a first guide sleeve 3, which is located at the upper port of the through hole inside the first plugging chamber 8, and the lower end of the first guide sleeve 3 is pressed against the upper end of the flared tube body 61.

[0030] Specifically, it also includes a first stopper rod cover plate 2, which is connected to the upper end of the first stopper chamber 8, and the lower end face is pressed against the first guide sleeve 3.

[0031] Specifically, the first sealing bracket 6 is made of PTFE or PEEK material.

[0032] Specifically, a groove is opened at the lower port of the through hole inside the first insert chamber 8, and the first silicone suction nozzle 9 is connected inside the groove.

[0033] This sealing structure adds a first sealing bracket upper sealing ring 4 at the upper groove 62 of the flared tube body 61. The compression ratio of the first sealing bracket upper sealing ring 4 is controlled within the range of 10%-15%, resulting in a relatively effective sealing effect. Under the elastic restraint of the first sealing bracket upper sealing ring 4, the upper groove 62 of the flared tube body 61 ensures dynamic sealing of the reciprocating motion between the first stopper rod 1 and the sealing bracket. The middle groove 63 and the lower groove 64 are respectively provided with the middle sealing ring 5 and the lower sealing ring 7 of the first sealing bracket. The first stopper rod cover plate 2 is connected to the first stopper chamber 8 by bolts. The first stopper rod cover plate presses down on the first guide sleeve 3, and the lower edge of the first guide sleeve 3 presses against the flared tube body 61, thereby ensuring radial sealing between the first sealing bracket 6 and the inner hole of the first stopper chamber 8. After the first stopper chamber 8 removes the rubber stopper 10, the first stopper rod 1 descends in parallel with the first stopper chamber 8 to the set position until the lip of the first silicone suction nozzle 9 is attached to the upper surface of the syringe glass bottle 11. The area at the bottom of the first stopper rod 1 and the internal space of the syringe glass bottle 11 form a completely sealed space with the external environment, thereby ensuring the effectiveness of the vacuum stoppering process.

[0034] The dynamic sealing structure used in this vacuum environment employs a sealing support assembly housed within a through-hole in the first stopper chamber 8. The first stopper rod 1 passes through the sealing support assembly, with its outer wall slidably connected to the interior of the assembly, achieving dynamic sealing of the stopper. This simultaneously seals both radial and axial directions. The first sealing support and the three sealing rings are all made of high-temperature resistant, food-grade material, capable of withstanding multiple high-temperature and moist heat sterilization processes. While ensuring a tight seal, this structure enhances the durability of the sealing components and reduces customer operating costs. It satisfies the requirements for dynamic sealing during linear motion while increasing the reusability of the entire stopper chamber assembly after sterilization, thereby improving the stability of the vacuum stoppering or vacuum filling process.

[0035] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dynamic sealing structure for use in a vacuum environment, characterized in that, It includes a sealing bracket assembly; the sealing bracket assembly is disposed in a through hole opened inside the first plugging chamber (8), the first plugging rod (1) passes through the sealing bracket assembly, and the outer wall is slidably connected to the inside of the sealing bracket assembly to achieve dynamic sealing of the plug.

2. The dynamic sealing structure for a vacuum environment according to claim 1, characterized in that, The sealing bracket assembly includes a first sealing bracket (6), which is a flared tube body (61). The upper end of the outer wall of the flared tube body (61) is provided with an upper groove (62), the middle part is provided with a middle groove (63), and the lower end is provided with a lower groove (64).

3. The dynamic sealing structure for a vacuum environment according to claim 2, characterized in that, The sealing bracket assembly further includes an upper sealing ring (4), a middle sealing ring (5), and a lower sealing ring (7) of the first sealing bracket; the upper sealing ring (4) of the first sealing bracket is connected to the upper groove (62); the middle sealing ring (5) of the first sealing bracket is connected to the middle groove (63); and the lower sealing ring (7) of the first sealing bracket is connected to the lower groove (64). The outer walls of the sealing ring (5) in the first sealing bracket and the lower sealing ring (7) of the first sealing bracket are in contact with the inner wall of the through hole inside the first plugging chamber (8).

4. The dynamic sealing structure for a vacuum environment according to claim 2, characterized in that, It also includes a first guide sleeve (3), which is located at the upper port of the through hole inside the first plugging chamber (8), and the lower end of the first guide sleeve (3) is pressed against the upper end of the flared tube body (61).

5. The dynamic sealing structure for a vacuum environment according to claim 4, characterized in that, It also includes a first stopper rod cover plate (2), which is connected to the upper end of the first stopper chamber (8), and the lower end face is pressed against the first guide sleeve (3).

6. The dynamic sealing structure for a vacuum environment according to claim 2, characterized in that, The first sealing bracket (6) is made of PTFE or PEEK material.

7. The dynamic sealing structure for a vacuum environment according to claim 1, characterized in that, A groove is opened at the lower port of the through hole inside the first plugging chamber (8), and a first silicone suction nozzle (9) is connected inside the groove.

8. The dynamic sealing structure for a vacuum environment according to claim 2, characterized in that, A boss is provided between the middle groove (63) and the lower groove (64) on the outer wall of the flared tube body (61).

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