Air pressure pressing mechanism for sealing vacuum cabin

Abstract

The utility model relates to an air pressure hold-down mechanism for vacuum cabin sealing, which comprises an air cylinder assembly, a pulling plate assembly, a locking plate and an elastic piece, the air cylinder assembly comprises an air cylinder body, an air cylinder support and an air cylinder joint fixedly connected to a piston shaft end, and the air cylinder support is connected to the outer wall of a vacuum cabin; the pulling plate assembly comprises a pulling plate body and a pulling plate support hinged to the pulling plate body, the pulling plate support is connected to the outer wall of the vacuum cabin, and the pulling plate support and the air cylinder support correspond to each other in the axial direction; the locking plate comprises a driving part and a follow-up part which are distributed in an obtuse angle, a turning part is formed at the joint of the driving part and the follow-up part, one end of the driving part is hinged to the air cylinder connector, the turning part is hinged to the other end of the pulling plate body, and the follow-up part is constructed to be capable of being driven by the driving part to loosen or press the end socket through swinging; the elastic piece is connected between the pulling plate body and the driving part. The pressing device is simple in structure and convenient to operate, and the pressing effect and the air tightness of the vacuum cabin can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of cabin sealing technology, specifically a pneumatic pressing mechanism for sealing vacuum cabins. Background Technology

[0002] To ensure the internal sealing of large vacuum equipment, a clamping mechanism is typically used to seal and lock the end caps at one or both ends. Existing clamping mechanisms are complex and cumbersome to operate. For example, utility model patent CN215763247U discloses an end cap suitable for vacuum environments, further explaining that "when establishing a vacuum in a vacuum container, the end cap body can be manually rotated around the hinge structure assembly to the minimum angle from the container body. Then, the clamping unit's clips are engaged on the two flange surfaces, and four handwheels are rotated sequentially to ensure the two flanges are clamped. When a vacuum pump is used to establish a vacuum in the vacuum container, the sealing ring is continuously compressed and deformed under the action of the clamping unit, ultimately achieving a vacuum seal. After repressurization, the four clamping units can be rotated to completely release, and then the end cap body can be opened using the switch handle." This solution, requiring manual operation of the clamping structure, not only restricts operational efficiency but also limits the application scenarios of the vacuum equipment, necessitating urgent improvement. Utility Model Content

[0003] The purpose of this utility model is to provide a pneumatic pressing mechanism for sealing vacuum chambers, which can solve the technical problems of complex structure and cumbersome operation mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic pressing mechanism for sealing a vacuum chamber, comprising a cylinder assembly, a pull plate assembly, a locking plate, and an elastic element. The cylinder assembly includes a cylinder body, a cylinder support hinged to the bottom end of the cylinder body, and a cylinder connector fixedly connected to the piston shaft end of the cylinder body. The cylinder support is fixedly connected to the outer wall of the vacuum chamber. The pull plate assembly includes a pull plate body and a pull plate support hinged to one end of the pull plate body. The pull plate support is fixedly connected to the outer wall of the vacuum chamber, and the pull plate support and the cylinder support are axially corresponding to each other. The locking plate includes an active part and a follower part distributed at an obtuse angle, with the junction of the two forming a turning part. One end of the active part is hinged to the cylinder connector, and the turning part is hinged to the other end of the pull plate body. The follower part is configured to be able to loosen or press against the end cap flange by swinging under the drive of the active part. The elastic element is connected between the pull plate body and the active part.

[0005] In a preferred embodiment, the pull plate body is constructed as an L-shape formed by connecting a long axis and a short axis, one end of the short axis is hinged to the pull plate support, the long axis is connected to the other end of the short axis, and the long axis is connected to a U-shaped connector for connecting the bend at the end facing the end cap.

[0006] In a preferred embodiment, the length of the long shaft is greater than the sum of the heights of the vacuum chamber flange and the head flange.

[0007] In a preferred embodiment, the active part has a first connecting groove on the side facing the pull rod assembly, the long axis of the pull plate body has a second connecting groove on the side facing the locking plate, and the two ends of the elastic member are respectively connected to the first connecting groove and the second connecting groove.

[0008] In a preferred embodiment, the elastic element is a spring or a tension spring.

[0009] In another aspect, this utility model also provides a technical solution for a vacuum chamber, including the pneumatic pressing mechanism described in any of the above solutions.

[0010] In a preferred embodiment, the pneumatic clamping mechanism is configured in multiple groups and distributed at intervals along the circumference of the vacuum chamber to further ensure the tightness of the connection between the end cap and the vacuum chamber.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: The pneumatic pressing mechanism for sealing vacuum chambers provided by this utility model, through the cooperation of cylinder assembly, pull plate assembly and locking plate, not only has a simple structure and is easy to operate, but also ensures the pressing effect and the airtightness of the vacuum chamber. Furthermore, through the setting of elastic elements, the stability of the locking plate movement can be further improved, and the overall reliability of the pressing mechanism can be improved. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the pneumatic pressing mechanism for sealing a vacuum chamber in an embodiment of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the pneumatic pressing mechanism (elastic part not shown) and the vacuum chamber in an embodiment of this utility model.

[0014] Figure 3 This is a schematic diagram of the structure of the pull plate assembly in an embodiment of this utility model;

[0015] Figure 4 This is a schematic diagram of the locking plate in an embodiment of the present invention.

[0016] The meanings of the labels in the diagram are as follows:

[0017] 1. Vacuum chamber; 2. Vacuum chamber flange; 3. End cap; 4. End cap flange; 5. Cylinder assembly; 51. Cylinder body; 52. Cylinder support; 53. Cylinder connector; 6. Pull plate assembly; 61. Pull plate body; 611. Long shaft; 612. Short shaft; 613. Second connecting groove; 62. Pull plate support; 63. U-shaped connector; 7. Locking plate; 71. Active part; 711. First connecting groove; 72. Follower part; 73. Turning part; 8. Elastic element. Detailed Implementation

[0018] 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.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] See Figures 1-2 This embodiment discloses a pneumatic pressing mechanism for sealing a vacuum chamber. The pneumatic pressing mechanism is connected to the outer wall of the vacuum chamber 1 and close to the end cap 3 of the vacuum chamber 1. The end cap 3 is pressed against the vacuum chamber 1 by the pneumatic pressing mechanism to ensure the sealing of the inside of the vacuum chamber 1.

[0021] The pneumatic clamping mechanism includes a cylinder assembly 5 fixedly connected to the outer wall of the vacuum chamber 1, a pull plate assembly 6 fixedly connected to the outer wall of the vacuum chamber 1, and a locking plate 7 connected between the cylinder assembly 5 and the pull plate assembly 6. The locking plate 7 is connected to the output end of the cylinder assembly 5. The cylinder assembly 5 can drive the locking plate 7 to move and swing with its connection point with the pull plate assembly 6 as the fulcrum. The swinging motion causes the locking plate 7 to loosen or press against the end flange 4.

[0022] In this embodiment, the pneumatic clamping mechanism further includes an elastic element 8 connected between the locking plate 7 and the pull plate assembly 6. The traction force of the elastic element 8 can control the accuracy and stability of the relative movement between the locking plate 7 and the pull plate assembly 6.

[0023] Specifically, the cylinder assembly 5 includes a cylinder body 51, a cylinder support 52 hinged to the bottom end of the cylinder body 51, and a cylinder connector 53 fixedly connected to the piston shaft end of the cylinder body 51. The cylinder connector 53 is used to connect the locking plate 7. In this embodiment, the cylinder support 52 is fixedly connected to the outer wall of the vacuum chamber 1, providing support for one end of the cylinder assembly 5. The other end of the cylinder assembly 5 is supported by the locking plate 7 and the pull plate assembly 6. The cylinder body 51 is arranged along the length of the vacuum chamber 1, and the piston shaft of the cylinder body 51 faces the end cap 3. It is understood that in other embodiments not shown, the cylinder body 51 may also adopt a linear motion structure such as a hydraulic cylinder or an electric cylinder.

[0024] The pull plate assembly 6 includes a pull plate body 61 and a pull plate support 62 hinged to one end of the pull plate body 61. In this embodiment, the pull plate support 62 is fixedly connected to the outer wall of the vacuum chamber 1 and corresponds to the cylinder support 52 in the axial direction. The pull plate support 62 is located on one side of the vacuum chamber flange 2.

[0025] like Figure 3 As shown, the pull plate body 61 is constructed as an L-shape formed by integrally connecting a long shaft 611 and a short shaft 612. One end of the short shaft 612 is hinged to the pull plate support 62, and the long shaft 611 is integrally connected to the other end of the short shaft 612 and extends towards the end cap 3. In this embodiment, the length of the long shaft 611 needs to be greater than the sum of the heights of the vacuum chamber flange 2 and the end cap flange 4, and a U-shaped connector 63 for connecting the locking plate 7 is fixed at the end of the long shaft 611 facing the end cap 3.

[0026] like Figure 4 As shown, the locking plate 7 includes an integrally formed active part 71 and a follower part 72, which are distributed at an obtuse angle, and the junction of the two forms a turning part 73. One end of the active part 71 is hinged to the cylinder connector 53, and the turning part 73 is hinged to the U-shaped connector of the pull plate body 61. This connection provides support to the other end of the piston assembly. The follower part 72 corresponds to the position of the end flange 4. The piston assembly drives the active part 71 of the locking plate 7 to swing around the turning part 73 as a fulcrum, thereby driving the follower part 72 to swing towards or away from the end flange 4. When the piston rod extends, the follower part 72 can press against the end flange 4, pressing it tightly against the vacuum chamber 1.

[0027] In practical applications, the vacuum chamber is placed horizontally. When the cylinder assembly 5 is installed at or near the bottom of the vacuum chamber 1, or due to factors such as the cylinder's own weight or unstable compressed air, the follower part 72 of the locking plate 7 may become unbalanced and unable to accurately engage with the end cap flange 4. Therefore, in this embodiment, an elastic element 8 is specially provided to traction the movement of the locking plate 7. The elastic element 8 is connected between the active part 71 of the locking plate 7 and the long axis 611 of the pull plate body 61. Specifically, the active part 71 of the locking plate 7 has a first connecting groove 711 on the side facing the pull rod assembly, and correspondingly, the long axis 611 of the pull plate body 61 has a second connecting groove 613 on the side facing the locking plate 7. The two ends of the elastic element 8 are fixedly connected to the first connecting groove 711 and the second connecting groove 613, respectively. The elastic element 8 can traction the movement of the locking plate 7 to ensure that its position relative to the pull plate body 61 does not shift, thereby improving the reliability and stability of its locking. The elastic element 8 can be an existing elastic structure such as a spring or tension spring.

[0028] To further ensure the tightness of the connection between the end cap 3 and the vacuum chamber 1, preferably, the pneumatic clamping mechanism is set in multiple sets and distributed at intervals along the circumference of the vacuum chamber 1.

[0029] The pneumatic pressing mechanism for sealing the vacuum chamber provided in this embodiment, through the cooperation of the cylinder assembly 5, the pull plate assembly 6 and the locking plate 7, not only has a simple structure and is easy to operate, but also ensures the pressing effect and the airtightness of the vacuum chamber 1. Furthermore, the setting of the elastic element 8 can further improve the stability of the movement of the locking plate 7 and improve the overall reliability of the pressing mechanism.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pneumatic pressing mechanism for sealing a vacuum chamber, characterized in that, include: The cylinder assembly (5) includes a cylinder body (51), a cylinder support (52) hinged to the bottom end of the cylinder body (51), and a cylinder connector (53) fixedly connected to the piston shaft end of the cylinder body (51). The cylinder support (52) is fixedly connected to the outer wall of the vacuum chamber (1). The pull plate assembly (6) includes a pull plate body (61) and a pull plate support (62) hinged to one end of the pull plate body (61). The pull plate support (62) is fixedly connected to the outer wall of the vacuum chamber (1). The pull plate support (62) and the cylinder support (52) are axially corresponding to each other. The locking plate (7) includes an active part (71) and a follower part (72) distributed at an obtuse angle. The junction of the two forms a turning part (73). One end of the active part (71) is hinged to the cylinder connector (53), and the turning part (73) is hinged to the other end of the pull plate body (61). The follower part (72) is configured to be able to loosen or press against the end flange (4) by swinging under the drive of the active part (71). The elastic element (8) is connected between the pull plate body (61) and the active part (71).

2. The pneumatic pressing mechanism for sealing a vacuum chamber according to claim 1, characterized in that, The pull plate body (61) is constructed as an L-shape formed by connecting a long shaft (611) and a short shaft (612). One end of the short shaft (612) is hinged to the pull plate support (62), and the long shaft (611) is connected to the other end of the short shaft (612). The long shaft (611) is connected to a U-shaped connector (63) for connecting the turning part (73) at the end facing the end cap.

3. The pneumatic pressing mechanism for sealing a vacuum chamber according to claim 2, characterized in that, The length of the long axis (611) is greater than the sum of the heights of the vacuum chamber flange (2) and the head flange (4).

4. The pneumatic pressing mechanism for sealing a vacuum chamber according to claim 1, characterized in that, The active part (71) has a first connecting groove (711) on the side facing the pull rod assembly, and the long axis (611) of the pull plate body (61) has a second connecting groove (613) on the side facing the locking plate (7). The two ends of the elastic member (8) are respectively connected to the first connecting groove (711) and the second connecting groove (613).

5. The pneumatic pressing mechanism for sealing a vacuum chamber according to claim 1, characterized in that, The elastic element (8) is a spring or a tension spring.

6. A vacuum chamber, characterized in that, Includes the pneumatic pressing mechanism as described in any one of claims 1-5.

7. The vacuum chamber according to claim 6, characterized in that, The pneumatic pressing mechanism is configured in multiple groups and is distributed circumferentially along the vacuum chamber (1).

Images