Sealing mechanism

Abstract

The utility model discloses a sealing mechanism which ensures that an annular sealing piece can be continuously and stably kept in a compressed state on a convex ring through the close fit of a sealing part and a fixing part through a locking piece. The sealing part is not in direct contact with the convex ring, so that the sealing performance is effectively prevented from being influenced by direct abrasion between the sealing part and the convex ring. And moreover, the sealing performance cannot be reduced due to the change of external conditions (such as temperature fluctuation or mechanical vibration), and the long-term stable sealing effect is ensured.

Description

Technical Field

[0001] The utility model relates to the field of film coating equipment, in particular to a sealing mechanism. Background Art

[0002] In the field of vacuum technology applications, especially in the use of vacuum coating machines, an efficient and reliable vacuum system is essential to ensure the quality and efficiency of the coating process. The vacuum coating machine is mainly composed of a coating chamber, a vacuum system, an electrical control system, and a rack. In the vacuum system, the diffusion pump plays an indispensable role as a key component to improve the vacuum degree.

[0003] The working principle of the diffusion pump relies on operation under high temperature conditions to achieve effective extraction of gas molecules and thus achieve a high vacuum state. In this process, the sealing performance of the interface of the pump body is particularly important. Traditionally, the KF joint of the diffusion pump uses an O-type rubber seal ring in conjunction with the frame and pressure plate of the limit seal ring for sealing. This design can provide a satisfactory sealing effect in the early stage and ensure the normal operation of the vacuum system. However, due to the continuous operation of the diffusion pump at high temperature, the O-type rubber seal ring will deform due to thermal expansion. When the equipment needs maintenance or encounters a malfunction and must be shut down, the temperature of the diffusion pump will drop accordingly. At this time, the originally expanded O-type rubber seal ring will gradually harden due to the continuous pressure during the cooling process. After multiple starts and stops, the seal ring may be flattened, resulting in direct contact between the pressure plate and the frame. In this case, the original seal ring will no longer be able to continue to perform its sealing function, thereby affecting the sealing performance of the entire vacuum system, and further affecting the normal operation and coating quality of the vacuum coating machine.

[0004] Therefore, there is an urgent need for a sealing mechanism with better sealing performance. Utility Model Content

[0005] In order to overcome the defects of the sealing methods in the prior art, the utility model provides a sealing mechanism whose sealing performance does not decay after multiple operation cycles.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A sealing mechanism for sealing a quick-release connector, comprising:

[0008] A quick-release connector having a tube body and a convex ring disposed at an opening of the tube body;

[0009] A sealing portion, the sealing portion covers the convex ring along one side of the opening of the tube body and has a first connecting end;

[0010] an annular seal, the annular seal being arranged between the sealing portion and the convex ring;

[0011] A fixing portion, the fixing portion is fixedly connected to the quick connector and has a second connecting end;

[0012] The first connection end and the second connection end are locked together by a locking member, so that the sealing portion presses the annular sealing member and seals the opening of the quick connector.

[0013] Furthermore, the sealing portion has a positioning groove, and the annular sealing member is embedded in the positioning groove.

[0014] Furthermore, the depth of the positioning groove is greater than the thickness of the annular sealing member, and the convex ring can be fully or partially accommodated in the positioning groove.

[0015] Furthermore, the sealing portion further comprises a convex column, the positioning groove is arranged around the convex column, and the convex column is plugged into the tube body of the quick connector.

[0016] Furthermore, the fixing portion is sleeved on the tube body, and a contact end is provided on the fixing portion facing the convex ring. When the first connecting end and the second connecting end are locked by a locking member, the contact end contacts the convex ring.

[0017] Furthermore, the fixing portion includes a first fixing unit and a second fixing unit having the same structure, and the first fixing unit and the second fixing unit are cooperated to be fixed and sleeved on the tube body of the quick connector.

[0018] Furthermore, the width of the annular seal is not greater than the width of the convex ring, and the cross-section is rectangular.

[0019] Furthermore, the annular seal is a polytetrafluoroethylene sealing gasket.

[0020] Furthermore, the locking member is a bolt, the first connecting end and the second connecting end are bolt holes arranged opposite to each other, and the bolt passes through the bolt holes to lock the sealing part and the fixing part.

[0021] Furthermore, the bolt hole is a through hole or a threaded hole.

[0022] The beneficial effects of the utility model are:

[0023] The sealing mechanism of the utility model ensures that the annular seal can be continuously and stably kept in a compressed state on the convex ring by the tight fit of the sealing part and the fixed part through the locking piece. The sealing part will not be in direct contact with the convex ring, which can effectively avoid the sealing performance being affected by the direct wear between the sealing part and the convex ring. In addition, the sealing performance will not be reduced due to changes in external conditions (such as temperature fluctuations or mechanical vibrations), ensuring a long-term stable sealing effect. Through the design of the locking piece, this solution makes it easy to assemble and disassemble the sealing part and the fixed part, thereby facilitating the rapid replacement of the annular seal or daily maintenance, thereby improving the maintenance efficiency of the equipment and reducing downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is an exploded schematic diagram of the utility model;

[0026] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0027] Figure 3 It is a front schematic diagram of the utility model.

[0028] in,

[0029] 10. Quick-release connector; 11. Pipe body; 12. Convex ring;

[0030] 20. Sealing portion; 21. First connecting end; 22. Positioning groove; 23. Boss;

[0031] 30. Annular seal;

[0032] 40. fixing portion; 41. second connecting end; 42. abutting end; 43. first fixing unit; 44. second fixing unit;

[0033] 50. Locking parts. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0035] Reference Figure 1 A sealing mechanism is used to seal a quick connector 10, wherein the quick connector 10 has a tube body 11 and a convex ring 12 disposed at the opening of the tube body 11, and includes a sealing portion 20, an annular sealing member 30, and a fixing portion 40. The sealing portion 20 covers the convex ring 12 along one side of the opening of the tube body 11 and has a first connecting end 21; the annular sealing member 30 is disposed between the sealing portion 20 and the convex ring 12; the fixing portion 40 is sleeved on the tube body 11 and has a second connecting end 41; the first connecting end 21 and the second connecting end 41 are locked by a locking member 50, so that the sealing portion 20 presses the annular sealing member 30 and seals the opening of the quick connector 10.

[0036] The utility model discloses a sealing mechanism, wherein the sealing portion 20 and the fixing portion 40 are locked together through the first connecting end 21 and the second connecting end 41 through the locking member 50, so that the sealing portion 20 presses the annular sealing member 30 and seals the opening of the quick connector 10, that is, the annular sealing member 30 abuts against the sealing portion 20 and the fixing portion 40 respectively, and the sealing portion 20 is locked with the fixing portion 40 through the locking member 50, so that the sealing portion 20 can always and continuously press the annular sealing member 20 against the convex ring 12, and the sealing portion 20 will not directly contact the convex ring 12, so that the sealing mechanism of the utility model has reliable, long-term and stable sealing performance, can ensure that the seal is maintained under different pressure and temperature conditions, and prevent gas exchange between the inside and the outside of the quick connector 10.

[0037] The quick-release connector 10 here is a KF connector having a tube body 11 and a convex ring 12 . It is understandable that the present invention is also applicable to connectors having a similar structure to the quick-release connector 10 .

[0038] In some embodiments, the width of the annular seal 30 is not greater than the width of the convex ring 12, and the cross section is rectangular. It is understandable that if the width of the annular seal 30 is greater than the width of the convex ring 12, when the annular seal 30 is squeezed by the convex ring 12, the pressure at the position where the annular seal 30 contacts the convex ring 12 will be greater than other positions that are not in contact, so that the position where the annular seal 30 does not contact the convex ring 12 is deformed, which may cause damage to the annular seal 30, thereby affecting the sealing performance of the sealing mechanism. Further, the cross section of the annular seal 30 is rectangular, and the annular seal 30 is parallel to the contact surface of the convex ring 12 and the sealing part 20, that is, the annular seal 30 is in parallel surface contact with the convex ring 12 and the sealing part 20. When the sealing part 20 is squeezed by the convex ring 12, the annular seal 30 is evenly stressed, which can not only improve the service life of the annular seal 30, but also further improve the sealing performance. In some embodiments, the annular seal 30 is a polytetrafluoroethylene gasket. The tetrafluoroethylene gasket is made of polytetrafluoroethylene (PTFE) material. Polytetrafluoroethylene is suitable for use as a gasket due to its excellent chemical stability, excellent temperature resistance, low friction coefficient and excellent electrical insulation performance. Of course, the annular seal 30 can also be selected from other gaskets with the same or similar materials, such as polytetrafluoroethylene propylene (FFKM), Viton (i.e. fluororubber), etc.

[0039] When the sealing portion 20 is pressed and squeezed, the annular seal 30 may be displaced on the surface of the convex ring 12. That is, the extrusion causes the annular seal 30 to deviate from its original position, making the annular seal 30 between the sealing portion 20 and the convex ring 12 unevenly distributed or even causing the sealing portion 20 to directly contact the convex ring 12. To solve this problem, refer to Figure 3 In some embodiments, the sealing portion 20 has a positioning groove 22, and the annular seal 30 is embedded in the positioning groove 22. It is understandable that the annular seal 30 can be partially embedded in the positioning groove 22, or can be fully embedded in the positioning groove 22. The positioning groove allows the annular seal 30 to remain in a preset position during the extrusion process, thereby further improving the sealing stability and sealing performance.

[0040] In some embodiments, the depth of the positioning groove 22 is greater than the thickness of the annular seal 30, and the convex ring 12 can be fully or partially accommodated in the positioning groove 22. It can be understood that when the depth of the positioning groove 22 is greater than the thickness of the annular seal 30, the annular seal 30 is accommodated in the positioning groove 22. At this time, the convex ring 12 needs to maintain contact with the annular seal 30 and needs to be fully or partially accommodated in the positioning groove 22, so that when the convex ring 12 squeezes the annular seal 30, the annular seal 30 is always inside the positioning groove 22, and even if the annular seal 30 is deformed due to squeezing, it will not exceed the range of the positioning groove 22, thereby further improving the sealing stability of the sealing mechanism.

[0041] In some embodiments, reference Figure 1 , 3 , the sealing part 20 also has a boss 23, the positioning groove 22 is arranged around the boss 23, and the boss 23 is plugged into the tube body 11 of the quick connector 10. It can be understood that at this time, the positioning groove 22 is an annular positioning groove 22, and the annular seal 30 is accommodated in the positioning groove 22. The boss 23 extends along the inside of the tube body 11, that is, the boss 23 is plugged into the tube body 11. Specifically, the boss 23 is a plug. On the one hand, the plug is plugged into the tube body 11, and the plug cooperates with the inner wall of the tube body 11 to seal, which is used to close the opening of the tube body 11 and achieve the first seal; on the other hand, when installing, the plug can facilitate the positioning of the annular seal 30, and quickly position and install the sealing part 20 on the quick connector 10. With respect to the first aspect, the plug cooperates with the tube body 11 to form a first seal, and the sealing part 20, the annular seal 30 and the convex ring 12 cooperate to form a second seal. Through the two seals, the sealing performance of the sealing mechanism is further improved.

[0042] In some embodiments, reference Figure 1-3 The fixing portion 40 is provided with an abutting end 42 on the side facing the convex ring 12. When the first connecting end 21 and the second connecting end 41 are locked by the locking member 50, the abutting end 42 abuts against the convex ring 12. Specifically, the abutting end 42 is integrally formed with the fixing portion 40, and the abutting end 42 is arranged along the circumferential direction of the inner diameter of the fixing portion 40, and the second connecting end 41 is located on the side away from the abutting end 42. When the sealing mechanism is in a sealing state, the fixing portion 40 and the sealing portion 20 are locked by the locking member 50. At this time, the spacing between the fixing portion 40 and the sealing portion 20 can be increased by setting the abutting portion, thereby reserving a scheduling space for adjusting the sealing degree between the fixing portion 40 and the sealing portion 20.

[0043] In some embodiments, reference Figure 1In order to facilitate the disassembly and installation of the fixing part 40, the fixing part 40 includes a first fixing unit 43 and a second fixing unit 44 having the same structure, and having a semi-cylindrical concave surface. The first fixing unit 43 and the second fixing unit 44 are fixed and sleeved on the tube body 11 of the quick connector 10. It can be understood that the first fixing unit 43 and the second fixing unit 44 are connected by fasteners, and the fasteners are preferably bolts. When in use, it is only necessary to combine the first fixing unit 43 and the second fixing unit 44 and fix them by bolts, and sleeve them on the tube body 11, which is convenient for installation and later disassembly. In addition, the structure is simple and easy to produce and process. In some embodiments, the first fixing unit 43 and the second fixing unit 44 are movably connected at one end, and when in use, they are fixed at the other end by bolts.

[0044] In some embodiments, further reference is made to Figure 1 , the locking member 50 is a bolt, the first connection end 21 and the second connection end 41 are bolt holes arranged oppositely, and the bolt passes through the bolt hole to lock the sealing part 20 and the fixing part 40. The bolt holes are arranged on the sealing part 20 and the fixing part 40, which have a simple structure and are easy to produce and process. They are also easy to install and disassemble through bolt connection, which is economical and reliable. Of course, in addition to bolt connection, other connection methods such as clamping can also be adopted. Further, the bolt hole is a through hole or a threaded hole. That is to say, the first connection end 21 and the second connection end 41 can be a through hole or a threaded hole. When the first connection end 21 and the second connection end 41 are through holes, the bolt needs to be fixed with a nut; when the first connection end 21 is a through hole and the second connection end 41 is a threaded hole, the bolt is inserted from the first connection end 21 and then fixed with the threaded hole of the second end. In addition, the positions of the bolt holes on the sealing part 20 and the fixing part 40 correspond to each other and the number is the same. On the sealing part 20, bolt holes are arranged along the outer circumference of the annular seal, at least two bolt holes are provided, and at least two bolt holes are located on the extension line of the diameter of the annular seal. In this case, there are preferably four threaded holes, which are arranged at intervals along the outer circumference of the annular seal.

[0045] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A sealing mechanism for sealing a quick-release connector, characterized in that: include: A quick-release connector having a tube body and a convex ring disposed at an opening of the tube body; A sealing portion, the sealing portion covers the convex ring along one side of the opening of the tube body and has a first connecting end; an annular seal, the annular seal being arranged between the sealing portion and the convex ring; A fixing portion, the fixing portion is fixedly connected to the quick connector and has a second connecting end; The first connection end and the second connection end are locked together by a locking member, so that the sealing portion presses the annular sealing member and seals the opening of the quick connector.

2. The sealing mechanism according to claim 1, characterized in that: The sealing portion has a positioning groove, and the annular sealing component is embedded in the positioning groove.

3. The sealing mechanism according to claim 2, characterized in that: The depth of the positioning groove is greater than the thickness of the annular sealing member, and the convex ring can be fully or partially accommodated in the positioning groove.

4. The sealing mechanism according to claim 2, characterized in that: The sealing portion further comprises a convex column, the positioning groove is arranged around the convex column, and the convex column is plugged into the tube body of the quick connector.

5. The sealing mechanism according to claim 1, characterized in that: The fixing portion is sleeved on the tube body, and a contact end is provided on the fixing portion facing the convex ring. When the first connecting end and the second connecting end are locked by a locking member, the contact end contacts the convex ring.

6. The sealing mechanism according to claim 5, characterized in that: The fixing portion includes a first fixing unit and a second fixing unit having the same structure. The first fixing unit and the second fixing unit are matched and fixed to and sleeved on the tube body of the quick connector.

7. The sealing mechanism according to any one of claims 1 to 6, characterized in that: The width of the annular seal is not greater than the width of the convex ring, and the cross section is rectangular.

8. The sealing mechanism according to claim 7, characterized in that: The annular sealing member is a polytetrafluoroethylene sealing gasket.

9. The sealing mechanism according to any one of claims 1 to 6, characterized in that: The locking member is a bolt, the first connecting end and the second connecting end are bolt holes arranged opposite to each other, and the bolt passes through the bolt holes to lock the sealing part and the fixing part.

10. The sealing mechanism according to claim 9, characterized in that: The bolt hole is a through hole or a threaded hole.

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