Sealing device for vacuum extraction

Abstract

The sealing device for vacuum extraction comprises a pressing ring, a plurality of rotating holes are formed in the position, close to the periphery, of the pressing ring, and the rotating holes are rotationally connected with a fastening device. The fastening device comprises a rotating rod, a rotating plate and an abutting assembly, the rotating plate is fixedly connected to the top end of the rotating rod, the abutting assembly is fixedly connected to the position, close to the bottom end, of the rotating rod, and the top end is the end away from the groove; a limiting groove is formed in any side close to the rotating plate and used for being matched with the rotating plate. An abutting hole is formed in the position, away from the limiting groove, of the rotating hole and used for being matched with the abutting assembly; the rotating plate rotates to drive the rotating rod and the abutting assembly to rotate so as to abut against the inner wall of the groove or be away from the inner wall of the groove.

Description

Technical Field

[0001] The utility model relates to the field of sealing, in particular to a sealing device for vacuum extraction. Background Art

[0002] When the heat exchange tube is vacuumed, it needs to be sealed to ensure the vacuum effect. Usually, a sealing ring is placed in the groove, and the sealing ring is used to form a seal between the two contacting surfaces to prevent external gas from entering (see Figure 5 );

[0003] However, since the service life of the sealing ring is limited, continuing to use it beyond the service life will affect the sealing effect and needs to be replaced according to usage. In order to prevent the existing sealing ring from falling out of the groove, it is generally stuck in the groove more tightly, which also makes it more troublesome to remove the sealing ring. Forced removal can easily cause damage to other components. For this reason, the utility model provides a sealing device for vacuum extraction. Utility Model Content

[0004] The purpose of the utility model is to provide a sealing device for vacuum extraction to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A sealing device for vacuum extraction includes a pressure ring, a plurality of rotating holes are opened near the outer circumference of the pressure ring, and a fastening device is rotatably connected to the rotating holes.

[0007] The fastening device includes a rotating rod, a rotating plate and an abutment assembly. The rotating plate is fixedly connected to the top end of the rotating rod, and the abutment assembly is fixedly connected to the rotating rod near the bottom end, and the top end is the end away from the groove; a limiting groove is provided on either side close to the rotating plate for matching the rotating plate; an abutment hole is provided at the rotating hole away from the limiting groove for matching the abutment assembly;

[0008] The rotating plate is rotated to drive the rotating rod and the abutting assembly to rotate, so as to abut against the inner wall of the groove or to stay away from the inner wall of the groove.

[0009] Preferably, the abutment assembly comprises a fixed rod and an abutment plate, and two ends of the fixed rod are fixedly connected to the rotating rod and the abutment plate respectively.

[0010] Preferably, the abutment plate is in a symmetrical arc shape.

[0011] Preferably, the rotating plate and the fixing rod are vertically distributed, so that when the rotating plate rotates to the inside of the limiting groove, the fixing rod drives the abutting plate to rotate to the inner wall of the groove and abut against it.

[0012] Preferably, the rotating rod is fixedly connected with a toggle rod near the rotating plate, and the toggle rod is parallel to the fixed rod, so as to facilitate the rotating plate located in the limiting groove to be rotated out.

[0013] Preferably, the height distance from the bottom end of the abutment plate to the top end of the rotating plate is located within the height range of the pressure ring along the axial direction of the rotating rod.

[0014] Preferably, the rotating plate is located on the upper side of the maximum diameter of the outer circumference of the pressure ring, and the end of the rotating plate away from the rotating hole is located on the inner side of the maximum diameter of the outer circumference of the pressure ring.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model has a simple structure and is easy to operate. By adding a fastening device, the fastening state of the pressure ring and the groove can be controlled, so that the pressure ring is easy to take out and replace.

[0017] The rotation of the rotating plate drives the abutment assembly to rotate, so that it can abut against the inner wall of the groove, which will not cause the pressure ring to fall off during use, or move away from the inner wall of the groove to facilitate the removal of the pressure ring; at the same time, the abutment assembly moves in the space defined by the contact between the pressure ring and the inner wall of the groove, and the rotating plate is outside the groove, so when the pressure ring is placed in the groove, it will not affect the normal operation of the rotating device; the top of the limiting groove can limit the axial movement of the rotating rod and define the position of the abutment plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the connection between the fastening device and the pressure ring of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the fastening device being separated from the rotating hole at the rotating hole of the utility model;

[0021] Figure 4 This is a front view of the connection between the pressure ring and the fastening device of the utility model;

[0022] Figure 5 This is a cross-sectional view of the pressure ring of the utility model at the groove.

[0023] In the figure: 1 is a pressure ring, 2 is a fastening device, 21 is a rotating rod, 22 is a rotating plate, 23 is an abutting assembly, 231 is a fixing rod, 232 is an abutting plate, 3 is a limiting groove, and 4 is a rotating hole. DETAILED DESCRIPTION

[0024] Embodiment 1:

[0025] See also Figure 1-5The utility model provides a technical solution: a vacuum extraction sealing device, comprising a pressure ring 1, which is generally placed in a groove and is used to seal when two different surfaces are in contact (see Figure 5 ), to ensure that when extracting gas, external gas will not enter from the contact point between two different surfaces; the pressure ring 1 is made of metal;

[0026] A plurality of rotating holes 4 are provided near the periphery of the pressure ring 1, and the rotating holes 4 are rotatably connected with a fastening device 2, and the fastening device 2 comprises a rotating rod 21, a rotating plate 22 and an abutting assembly 23, the rotating plate 22 is fixedly connected to the top end of the rotating rod 21, and the abutting assembly 23 is fixedly connected to the rotating rod 21 near the bottom end, and the top end is the end away from the groove; a limiting groove 3 is provided on any side close to the rotating plate 22 for matching the rotating plate 22; an abutting hole is provided at the rotating hole 4 away from the limiting groove 3 for matching the abutting assembly 23;

[0027] The abutment assembly 23 includes a fixed rod 231 and an abutment plate 232. The two ends of the fixed rod 231 are fixedly connected to the rotating rod 21 and the abutment plate 232 respectively. The abutment plate 232 is symmetrically arc-shaped. The rotating plate 22 and the fixed rod 231 are vertically distributed, so that when the rotating plate 22 rotates to the inside of the limiting groove 3, the fixed rod 231 drives the abutment plate 232 to rotate to the inner wall of the groove and abut.

[0028] A toggle rod 24 is fixedly connected to the rotating rod 21 near the rotating plate 22. The toggle rod 24 is parallel to the fixed rod 231, so as to facilitate the rotating plate 22 located in the limiting groove 3 to be rotated out.

[0029] The height distance from the bottom end of the abutment plate 232 to the top end of the rotating plate 22 is located within the height interval of the pressure ring 1 along the axial direction of the rotating rod 21, and the rotating plate 22 is located on the upper side along the maximum diameter of the outer circumference of the pressure ring 1, and the end of the rotating plate 22 away from the rotating hole 4 is located on the inner side along the maximum diameter of the outer circumference of the pressure ring 1 (see Figure 4 ), so placing the pressure ring 1 in the groove does not affect the normal use of the fastening device 2;

[0030] Working principle: When in use, the operator passes the abutment assembly 23 and the rotating rod 21 through the abutment hole and the rotating hole 4 as the initial state; the pressure ring 1 is placed in the groove so that the abutment assembly 23 faces the inner wall of the groove. At this time, the maximum diameter of the outer circumference of the pressure ring 1 contacts the inner wall of the groove, and the pressure ring 1 is easier to take out from the groove; the rotating plate 22 is rotated into the limiting groove 3, so that the abutment plate 232 rotates toward the inner wall of the groove and abuts, thereby preventing the pressure ring 1 from falling off from the groove;

[0031] When replacing the pressing ring 1 , the operator rotates the toggle rod 24 in a direction away from the limiting groove 3 , so that the abutment plate 232 is separated from the inner wall of the groove, thereby reducing the friction resistance and facilitating the removal of the pressing ring 1 .

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing device for vacuum extraction, characterized in that: The pressure ring (1) comprises a plurality of rotation holes (4) formed near the outer circumference of the pressure ring (1), and the rotation holes (4) are rotationally connected to a fastening device (2). The fastening device (2) comprises a rotating rod (21), a rotating plate (22) and an abutment assembly (23); the rotating plate (22) is fixedly connected to the top end of the rotating rod (21); the abutment assembly (23) is fixedly connected to the rotating rod (21) near the bottom end, and the top end is the end away from the groove; a limiting groove (3) is provided on any side close to the rotating plate (22) for matching the rotating plate (22); an abutment hole is provided at a position of the rotating hole (4) away from the limiting groove (3) for matching the abutment assembly (23); The rotating plate (22) is rotated to drive the rotating rod (21) and the abutment assembly (23) to rotate, so as to abut against the inner wall of the groove or to move away from the inner wall of the groove.

2. A vacuum extraction sealing device according to claim 1, characterized in that: The abutment assembly (23) comprises a fixed rod (231) and an abutment plate (232), and two ends of the fixed rod (231) are fixedly connected to the rotating rod (21) and the abutment plate (232) respectively.

3. A vacuum extraction sealing device according to claim 2, characterized in that: The abutment plate (232) is in a symmetrical arc shape.

4. A vacuum extraction sealing device according to claim 2, characterized in that: The rotating plate (22) and the fixing rod (231) are vertically distributed, so that when the rotating plate (22) rotates to the inside of the limiting groove (3), the fixing rod (231) drives the abutting plate (232) to rotate to the inner wall of the groove and abut against it.

5. A vacuum extraction sealing device according to claim 1, characterized in that: The rotating rod (21) is fixedly connected to a toggle rod (24) near the rotating plate (22); the toggle rod (24) is parallel to the fixed rod (231) to facilitate the rotating plate (22) located in the limiting groove (3) to be rotated out.

6. A vacuum extraction sealing device according to claim 4, characterized in that: The height distance from the bottom end of the abutment plate (232) to the top end of the rotating plate (22) is located within the height range of the pressure ring (1) along the axial direction of the rotating rod (21).

7. A vacuum extraction sealing device according to claim 1, characterized in that: The rotating plate (22) is located on the upper side of the maximum diameter of the outer circumference of the pressing ring (1), and the end of the rotating plate (22) away from the rotating hole (4) is located on the inner side of the maximum diameter of the outer circumference of the pressing ring (1).

Images