Multi-sealing mechanism

Abstract

The utility model relates to the technical field of sealing devices of vacuum freeze dryers, in particular to a multi-sealing mechanism which comprises a sealing ring and a cold bridge breaking flange. The broken cold bridge flange is fixedly arranged at the top of a cold trap flange of the vacuum freeze dryer, and the central axis of the broken cold bridge flange and the central axis of the cold trap flange are collinear; the sealing ring is arranged at the top of the broken cold bridge flange, the central axis of the sealing ring and the central axis of the end cold bridge flange are collinear, the sealing ring is a medical silica gel sealing ring, the top of the sealing ring is connected with a bottom port of a material barrel of the vacuum freeze dryer, and the sealing ring is used for sealing the bottom port of the material barrel. According to the utility model, the sealing ring made of a medical silica gel material is selected to solve the problem that the sealing ring is easy to crack in the prior art, and the sealing ring of the device can also have a good sealing effect without being matched with vacuum silicone grease, so that the problem that a freeze-dried sample is polluted by the vacuum silicone grease is avoided, and the device has the characteristic of good sealing effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vacuum freeze drying machine sealing device technical field, especially in kind a multiple sealing mechanism. BACKGROUND

[0002] The vacuum freeze drying machine in prior art generally adopts nitrile O-shaped sealing ring to seal between the material cylinder and the cold trap flange of the vacuum freeze drying machine, however, when the freeze-dried sample in the material cylinder contains organic matter, it is easy to cause the nitrile O-shaped sealing ring to crack, and destroy its sealing property, therefore, the user generally guarantees the sealing effect of the nitrile O-shaped sealing ring by vacuum silicone grease on the outer surface of the nitrile O-shaped sealing ring, however, the vacuum silicone grease is very easy to cause pollution to the freeze-dried sample, and make the freeze-dried sample denature. SUMMARY

[0003] In view of the technical problems in the prior art, the utility model embodiment provides a multiple sealing mechanism, which comprises: a sealing ring and a cold bridge breaking flange.

[0004] The cold bridge breaking flange is fixedly arranged at the top of the cold trap flange of the vacuum freeze drying machine, and the central axis of the cold bridge breaking flange is collinear with the central axis of the cold trap flange.

[0005] The sealing ring is arranged at the top of the cold bridge breaking flange, the central axis of the sealing ring is collinear with the central axis of the cold bridge breaking flange, the sealing ring is a medical silica gel sealing ring, the top of the sealing ring is connected with the bottom port of the material cylinder of the vacuum freeze drying machine, and the bottom port of the material barrel is sealed.

[0006] Further, the sealing ring comprises: a sealing body and a plurality of sealing protrusions.

[0007] The sealing body is arranged at the top of the cold bridge breaking flange, and the central axis of the sealing body is collinear with the central axis of the cold bridge breaking flange.

[0008] The plurality of sealing protrusions are fixedly arranged at the top of the sealing body, the central axis of any sealing protrusion is collinear with the central axis of the sealing body, when the material barrel is buckled at the top of the sealing ring, the top of the sealing protrusion abuts against the bottom end surface of the material barrel.

[0009] Further, when the material barrel is buckled at the top of the sealing ring, the number of the sealing protrusions abutting against the bottom end surface of the material barrel is not less than 3.

[0010] Further, the top of the cold bridge breaking flange is provided with a positioning groove, the bottom of the sealing body is fixedly provided with a positioning protrusion, the positioning protrusion is inserted into the positioning groove, and the sealing body is positioned.

[0011] Furthermore, a limiting protrusion is fixedly provided on the top outer edge of the sealing body. When the material barrel is buckled on the top of the sealing ring, the top port of the material barrel is located in the inner cavity of the limiting protrusion.

[0012] Furthermore, a receiving groove is provided on the top of the cold-breaking bridge flange, and a heater is provided inside the receiving groove for heating the cold-breaking bridge flange.

[0013] Furthermore, the accommodating groove is an annular groove, the heater matches the inner cavity shape of the accommodating groove, and the sealing ring is located on the inner side of the heater.

[0014] The multiple sealing mechanism according to the embodiment of the present invention has the following beneficial effects:

[0015] 1. This device uses a sealing ring made of medical silicone to solve the problem of easy cracking of the sealing ring in the existing technology, and the sealing ring of this device can also have a good sealing effect without the need for vacuum silicone grease, thus avoiding the problem of vacuum silicone grease contaminating the freeze-dried sample.

[0016] 2. This device provides a plurality of sealing protrusions distributed in a "U" shape on the top of the sealing body. When the material barrel is buckled on the top of the sealing ring, the plurality of sealing protrusions abut against the bottom end surface of the material barrel to form a multi-layer seal on the bottom port of the material barrel, thereby improving the sealing effect of the device.

[0017] 3. This device heats the cold bridge flange by setting a heater on the cold bridge flange to prevent the cold air in the cold trap from leaking out and causing the water vapor in the air to condense into ice at the bottom port of the material barrel.

[0018] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of an assembly according to an embodiment of the present utility model;

[0020] Figure 2 for Figure 1 A partial enlarged schematic diagram of area A in the middle;

[0021] Figure 3 1 is a parts diagram of a sealing ring according to an embodiment of the present utility model.

[0022] Description of the accompanying drawings:

[0023] 1-sealing ring, 11-sealing body, 12-sealing protrusion, 13-positioning protrusion, 14-limiting protrusion, 2-breaking cold bridge flange, 21-positioning groove, 22-accommodating groove, 3-cold trap flange, 4-material barrel. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to further illustrate the present invention.

[0025] The aforementioned and other technical aspects, features, and functions of the present invention will be more clearly understood in the following detailed description of the embodiments with reference to the accompanying drawings. Directional terms such as up, down, left, right, front, and back, used in the following embodiments, are merely references to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes only and are not intended to limit the present invention. Furthermore, identical reference numerals throughout the embodiments denote identical components.

[0026] First, combine Figures 1 to 3 The multiple sealing mechanism according to the embodiment of the present invention is described, which is used to seal the material barrel 4 of a vacuum freeze dryer and has a wide range of application scenarios.

[0027] like Figure 1 As shown, the multiple sealing mechanism of the embodiment of the present invention includes: a sealing ring 1 and a cold-break bridge flange 2.

[0028] Specifically, if Figure 1 As shown, the cold bridge flange 2 is fixedly arranged on the top of the cold trap flange 3 of the vacuum freeze dryer, and the central axis of the cold bridge flange 2 is collinear with the central axis of the cold trap flange 3. A mechanical sealing mechanism is provided between the cold bridge flange 2 and the cold trap flange 3 to seal the cold bridge flange 2 and the cold trap flange 3; the sealing ring 1 is arranged on the top of the cold bridge flange 2, and the central axis of the sealing ring 1 is collinear with the central axis of the end cold bridge flange. The sealing ring 1 is a medical silicone sealing ring 1, and the top of the sealing ring 1 is connected to the bottom port of the material barrel of the vacuum freeze dryer, which is used to seal the bottom port of the material barrel 4; in this embodiment, the sealing ring 1 made of medical silicone material is selected to solve the problem of easy cracking of the sealing ring 1 in the prior art, and the sealing ring 1 of the device can also have a good sealing effect without being used with vacuum silicone grease, thereby avoiding the problem of contamination of the freeze-dried sample by vacuum silicone grease.

[0029] Further, if Figures 1 to 3As shown, the sealing ring 1 includes: a sealing body 11 and a plurality of sealing protrusions 12; the sealing body 11 is arranged at the top of the cold bridge flange 2, and the central axis of the sealing body 11 is collinear with the central axis of the end cold bridge flange; a plurality of sealing protrusions 12 are fixedly arranged at the top of the sealing body 11, and the central axis of any sealing protrusion 12 is collinear with the central axis of the sealing body 11, and a plurality of sealing protrusions 12 are arranged in a "U" shape on the top of the sealing body 11. When the material barrel 4 is buckled on the top of the sealing ring 1, the top of the sealing protrusion 12 abuts against the bottom end face of the material barrel 4; in this embodiment, by arranging a plurality of sealing protrusions 12 distributed in a "U" shape on the top of the sealing body 11, when the material barrel 4 is buckled on the top of the sealing ring 1, the plurality of sealing protrusions 12 abut against the bottom end face of the material barrel 4 to form a multi-layer seal on the bottom port of the material barrel 4, thereby improving the sealing effect of the device.

[0030] Further, if Figures 1 to 3 As shown, when the material barrel 4 is buckled on the top of the sealing ring 1, the number of the sealing protrusions 12 abutting against the bottom end surface of the material barrel 4 is not less than 3.

[0031] Further, if Figures 1 to 3 As shown, a positioning groove 21 is provided on the top of the end cold bridge flange, and a positioning protrusion 13 is fixedly provided on the bottom of the sealing body 11. The positioning protrusion 13 is plugged into the positioning groove 21 for positioning the sealing body 11.

[0032] Further, if Figures 1 to 3 As shown, a limiting protrusion 14 is fixedly provided on the top outer edge of the sealing body 11. When the material barrel 4 is buckled on the top of the sealing ring 1, the top port of the material barrel 4 is located in the inner cavity of the limiting protrusion 14, which is used to limit the material barrel 4.

[0033] Further, if Figures 1 to 3 As shown, a receiving groove 22 is provided on the top of the cold bridge flange 2, and an internal heater (not shown in the figure) of the receiving groove 22 is used to heat the cold bridge flange 2; in this embodiment, a heater is provided on the cold bridge flange to heat the cold bridge flange 2 to prevent the cold air in the cold trap from leaking out and causing the water vapor in the air to condense into ice at the bottom port of the material barrel 4.

[0034] Further, if Figures 1 to 3 As shown, the accommodating groove 22 is an annular groove, the heater matches the inner cavity shape of the accommodating groove 22, and the sealing ring 1 is located on the inner side of the heater.

[0035] Above, refer to ​ The multiple sealing mechanism according to the embodiment of the present invention is described, which has the following beneficial effects:

[0036] 1. This device solves the problem of easy cracking of the sealing ring 1 in the prior art by selecting a sealing ring 1 made of medical silicone, and enables the sealing ring 1 of this device to have a good sealing effect without the need for vacuum silicone grease, thereby avoiding the problem of vacuum silicone grease contaminating the freeze-dried sample.

[0037] 2. This device provides a plurality of sealing protrusions 12 distributed in a "U" shape on the top of the sealing body 11. When the material barrel 4 is buckled on the top of the sealing ring 1, the plurality of sealing protrusions 12 abut against the bottom end surface of the material barrel 4 to form a multi-layer seal on the bottom port of the material barrel 4, thereby improving the sealing effect of the device.

[0038] 3. This device heats the cold bridge flange 2 by arranging a heater on the cold bridge flange to prevent the cold air in the cold trap from leaking out and causing the water vapor in the air to condense into ice at the bottom port of the material barrel 4.

[0039] It should be noted that, in this specification, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the elements.

[0040] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as limiting the present invention. After reading the above description, various modifications and alternatives to the present invention will be readily apparent to those skilled in the art. Therefore, the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A multiple sealing mechanism, characterized in that: Including: sealing ring and cold-break bridge flange; The cold-break bridge flange is fixedly arranged on the top of the cold trap flange of the vacuum freeze dryer, and the central axis of the cold-break bridge flange is collinear with the central axis of the cold trap flange; The sealing ring is arranged on the top of the cold-breaking bridge flange, and the central axis of the sealing ring is collinear with the central axis of the cold-breaking bridge flange. The sealing ring is a medical silicone sealing ring, and the top of the sealing ring is connected to the bottom port of the material barrel of the vacuum freeze dryer for sealing the bottom port of the material barrel.

2. The multiple sealing mechanism according to claim 1, wherein: The sealing ring comprises: a sealing body and a plurality of sealing protrusions; The sealing body is arranged on the top of the cold end bridge flange, and the central axis of the sealing body is collinear with the central axis of the cold end bridge flange; The plurality of sealing protrusions are fixedly arranged on the top of the sealing body, and the central axis of any sealing protrusion is collinear with the central axis of the sealing body. When the material barrel is buckled on the top of the sealing ring, the top of the sealing protrusion abuts against the bottom end surface of the material barrel.

3. The multiple sealing mechanism according to claim 2, wherein: When the material barrel is buckled on the top of the sealing ring, the number of the sealing protrusions abutting against the bottom end surface of the material barrel is no less than 3.

4. The multiple sealing mechanism according to claim 2, wherein: A positioning groove is provided on the top of the end cold bridge flange, and a positioning protrusion is fixedly provided on the bottom of the sealing body. The positioning protrusion is plugged into the positioning groove to position the sealing body.

5. The multiple sealing mechanism according to claim 2, wherein: A limiting protrusion is fixedly provided on the top outer edge of the sealing body. When the material barrel is buckled on the top of the sealing ring, the top port of the material barrel is located in the inner cavity of the limiting protrusion.

6. The multiple sealing mechanism according to claim 1, wherein: A receiving groove is provided on the top of the cold-breaking bridge flange, and a heater is provided inside the receiving groove for heating the cold-breaking bridge flange.

7. The multiple sealing mechanism according to claim 6, wherein: The accommodating groove is an annular groove, the heater matches the inner cavity shape of the accommodating groove, and the sealing ring is located on the inner side of the heater.

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