Fluorination barrel sealing structure

Abstract

The invention relates to a sealing structure of a fluorination barrel, and relates to the technical field of fluorination barrels. The fluorination barrel sealing structure comprises a cover body, the cover body is used for being connected with an opening in the top of a barrel body, a flexible sealing ring is further arranged on the inner side of the cover body, the bottom of the flexible sealing ring is obliquely arranged outwards and abuts against the top of the opening of the barrel body, a ventilation cavity is further formed in the bottom of the cover body, and the ventilation cavity is communicated with the opening of the barrel body. An air allowing plate is arranged in the ventilation cavity and is in sliding connection with the inner wall of the ventilation cavity, and the sliding direction is the height direction of the cover body. The barrel has the effect that the probability that liquid in the barrel permeates into the threaded connection position of the cover body and the barrel body is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of fluorination barrels, and in particular to a sealing structure of a fluorination barrel. Background Art

[0002] Fluorinated barrels are special barrels that have a fluorination process added during the manufacturing process. After the fluorine and nitrogen mixed gas is blown on special blow molding equipment, a layer of polyfluorine material is added to the inner wall of the container itself, thereby reducing the solvent permeability. Therefore, it plays an important role.

[0003] Regarding the above-mentioned related technologies, since the barrel lid of the existing fluorination barrel is generally connected to the barrel body of the fluorination barrel by a threaded connection, and the fluorination barrel is generally used to store chemical liquids, and some chemical liquids have a high viscosity and are easy to volatilize, when the gas pressure in the barrel increases, the liquid level in the barrel is easy to rise, which makes it easy for the liquid in the barrel to penetrate into the threaded connection between the lid and the barrel body, causing the threaded connection between the lid and the barrel body to bond and solidify, thereby increasing the difficulty for relevant personnel to open the lid, so it needs to be improved. Summary of the Invention

[0004] In order to reduce the probability of liquid in the barrel penetrating into the threaded connection between the cover and the barrel body, the present application provides a fluorinated barrel sealing structure.

[0005] The present application provides a fluorination barrel sealing structure, which adopts the following technical solutions: A fluorination barrel sealing structure includes a cover body, which is used to connect with the top opening of the barrel body. A flexible sealing ring is also provided on the inner side of the cover body. The bottom of the flexible sealing ring is tilted outward and abuts against the top of the barrel opening. A ventilation cavity is also provided at the bottom of the cover body. An air-release plate is provided in the ventilation cavity. The air-release plate is slidably connected to the inner wall of the ventilation cavity, and the sliding direction is the height direction of the cover body.

[0006] By adopting the above technical solution, compared with the prior art, the liquid in the barrel body is more likely to penetrate into the threaded connection between the cover body and the barrel body when the gas pressure in the barrel increases, so that the threaded connection between the cover body and the barrel body is bonded and solidified; the setting of the flexible sealing ring and the air-allowing plate in this application enables the flexible sealing ring to abut the top of the opening in the barrel body, thereby separating the space between the barrel body opening and the threaded connection, reducing the probability of liquid in the barrel body overflowing into the threaded connection, and at the same time, the existence of the air-allowing plate enables the air-allowing plate to slide when the gas pressure in the barrel body increases, thereby increasing the overall space between the cover body and the barrel body, thereby reducing the pressure in the barrel body, causing the liquid level in the barrel body to drop or stop, and effectively reducing the probability of liquid moving out to the threaded connection.

[0007] Preferably, a vent is provided through the bottom of the air-letting plate, and a vent column is provided in the cover body, the bottom end of the vent column extends into the vent, and the side wall of the vent column abuts against the inner wall of the vent, and an air inlet is provided on the side wall of the bottom of the vent column, one end of the air inlet extends into the vent column, and both extend upward and are connected to the outside world.

[0008] By adopting the above technical solution, the ventilation column is set so that when the air plate slides upward, the air plate slides relative to the ventilation column, so that the bottom of the ventilation column is gradually exposed outside the vent, so that the air inlet at the bottom of the ventilation column is connected with the opening of the barrel body, so that the air in the barrel body can pass to the outside through the air inlet, thereby reducing the pressure of the gas in the barrel body, and then reducing the chance of the liquid level in the barrel body continuing to rise.

[0009] Preferably, an air outlet is provided on the top of the cover body, and the air inlet on the vent column is connected to the outside world through the air outlet. A sealing mechanism is also provided on the cover body, and the sealing mechanism includes a sealing cover and a driving assembly. The sealing cover is threadedly connected to the inner side wall of the air outlet to close the air outlet, and the air plate passes through the driving assembly to drive the sealing cover to rotate.

[0010] By adopting the above technical solution and setting up the sealing mechanism, the air plate can drive the sealing cover to rotate through the driving assembly when sliding, so that the air outlet is gradually opened, and the air inlet and the air outlet are connected, so that the air in the barrel body can pass out smoothly. At the same time, the existence of the sealing mechanism can also seal the air outlet when exhaust is not required, effectively ensuring the use effect of the present application and ensuring the sealing between the cover body and the barrel body.

[0011] Preferably, the bottom of the sealing cover is provided with an opening, and the side wall of the sealing cover is provided with a spiral groove. The driving assembly includes a driving column, which is connected to the top of the air release plate. The top of the driving column extends into the opening of the sealing cover. A driving part is also extended from the top of the driving column. The driving part extends into the spiral groove and abuts against the inner wall of the spiral groove.

[0012] By adopting the above technical solution, the driving column is set so that when the gas plate drives the driving column to move, the driving part on the driving column can abut against the inner wall of the spiral groove, thereby causing the sealing cover to rotate, and then one end of the sealing cover is gradually rotated out of the air outlet, so that the threaded connection between the air outlet and the sealing cover is gradually opened, and the gas in the barrel body is gradually discharged through the threaded connection, thereby effectively realizing the unsealing of the air outlet.

[0013] Preferably, a ventilation groove is provided on the side wall of the driving column, and an additional channel is provided on the cover body, and the ventilation groove is connected to the outside through the additional channel. An additional hole is also provided on the top of the ventilation column, and the ventilation groove on the driving column is used to communicate with the air inlet through the additional hole after displacement. The sealing mechanism also includes a sealing plate and a linkage assembly. The sealing plate is used to close the additional channel. One end of the sealing plate is rotatably connected to the cover body, and the linkage assembly is used to drive the sealing plate to rotate.

[0014] By adopting the above-mentioned technical solution, the ventilation groove, additional channel and additional hole are set, so that when the air plate and the driving column are allowed to slide to a certain position, the ventilation groove on the driving column can be connected with the additional hole on the ventilation column, so that the gas introduced through the air inlet can be discharged to the outside of the cover body through the additional hole, ventilation groove and additional channel, further increasing the exhaust efficiency, thereby ensuring the pressure in the barrel body, and at the same time, the presence of the sealing plate can also close the additional channel, thereby ensuring the sealing effect of the present application.

[0015] Preferably, the linkage assembly includes a linkage frame, one end of the linkage frame is rotatably connected to the sealing plate, and the rotation point is different from the rotation point of the sealing plate itself, and the other end of the linkage frame is rotatably connected to one side of the sealing cover.

[0016] By adopting the above technical solution and setting the linkage frame, when the sealing cover rotates, the sealing cover can drive the linkage frame to move, thereby causing the sealing plate to rotate, so that the sealing plate releases the blockage of the additional channel, allowing the additional channel to communicate with the outside world, thereby realizing the linkage between the sealing plate and the sealing cover.

[0017] Preferably, an extension portion is further extended downward from the top of the sealing cover, and the linkage frame is sleeved on the extension portion and is rotationally connected to the extension portion and slidingly connected to the extension portion.

[0018] By adopting the above technical solution and arranging the extension part, when the sealing cover is displaced, the linkage frame can slide relative to the extension part, thereby adapting to the rotation of the displacement of the sealing cover, so that the sealing cover can smoothly drive the linkage frame to displace, thereby ensuring the smooth operation of the linkage frame and the sealing plate.

[0019] Preferably, the number of the ventilation grooves, the additional channels, the additional holes and the sealing plates is set to be several and arranged in one-to-one correspondence, and each sealing plate is used to seal the corresponding additional channel.

[0020] By adopting the above technical solution, the setting of several sealing plates and additional channels can effectively increase the path for the gas in the barrel to pass out to the outside world, thereby effectively ensuring the discharge efficiency of the gas in the barrel and further reducing the chance of excessive gas pressure in the barrel.

[0021] Preferably, an air outlet groove is further provided on the top side wall of the sealing cover, the air outlet groove is communicated with the opening in the sealing cover, and the air inlet on the vent column is communicated with the air outlet groove on the sealing cover.

[0022] By adopting the above technical solution and setting the air outlet groove, the gas in the barrel can be discharged to the outside through the air outlet groove on the sealing cover when entering the opening of the sealing cover through the air inlet, effectively ensuring the discharge efficiency of the gas in the opening of the sealing cover.

[0023] Preferably, a return spring is further sleeved on the driving column, one end of the return spring abuts against the air release plate, and the other end of the return spring abuts against the inner wall of the cover body.

[0024] By adopting the above technical solution and setting the return spring, when the air plate and the driving column slip and the gas in the barrel body is discharged, the return spring can use its own elastic force to push the air plate and the driving column to return to their initial positions, thereby re-sealing the barrel body and effectively ensuring the sealing effect between the barrel body and the cover body.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The arrangement of the flexible sealing ring and the air release plate enables the flexible sealing ring to abut against the top of the barrel opening, thereby isolating the space between the barrel opening and the threaded connection, reducing the probability of liquid in the barrel overflowing into the threaded connection. At the same time, the presence of the air release plate allows the air release plate to slide when the gas pressure in the barrel increases, thereby increasing the overall space between the lid and the barrel, thereby reducing the pressure in the barrel, causing the liquid level in the barrel to drop or stop, and effectively reducing the probability of liquid flowing out of the threaded connection. 2. The vent column is arranged so that when the air plate slides upward, the air plate slides relative to the vent column, thereby gradually exposing the bottom of the vent column to the vent port, so that the air inlet at the bottom of the vent column is connected to the opening of the barrel body, so that the air in the barrel body can be discharged to the outside through the air inlet, thereby reducing the pressure of the gas in the barrel body and further reducing the probability of the liquid level in the barrel body continuing to rise; 3. The arrangement of the ventilation grooves, additional channels and additional holes enables the ventilation grooves on the driving column to be connected with the additional holes on the ventilation column when the air plate and the driving column are slid to a certain position, so that the gas introduced through the air inlet can be discharged to the outside of the cover body through the additional holes, ventilation grooves and additional channels, further increasing the exhaust efficiency and ensuring the pressure in the barrel body. At the same time, the presence of the sealing plate can also close the additional channels, thereby ensuring the sealing effect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram illustrating the overall sealing structure of the fluorination barrel in the embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the structure of the sealing cover in the embodiment of the present application.

[0028] Figure 3 It is a structural diagram used to reflect the ventilation column in the embodiment of the present application.

[0029] Figure 4 It is a structural diagram used to reflect the driving part in the embodiment of the present application.

[0030] Figure 5 It is a structural diagram for reflecting the linkage frame in the embodiment of the present application.

[0031] Explanation of the accompanying drawings: 1. Cover body; 11. Vent cavity; 12. Air outlet; 13. Additional channel; 2. Barrel body; 3. Flexible sealing ring; 4. Air release plate; 41. Vent; 5. Sealing mechanism; 51. Sealing cover; 511. Air outlet groove; 512. Spiral groove; 52. Drive assembly; 521. Drive column; 5211. Drive part; 53. Sealing plate; 54. Linkage assembly; 541. Linkage frame; 6. Return spring; 7. Vent column; 71. Air inlet; 72. Air inlet cavity; 73. Additional hole; 8. Vent groove; 9. Extension part. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-5 This application is described in further detail.

[0033] The embodiment of the present application discloses a fluorination barrel sealing structure. Figure 1 and Figure 2 The fluorination barrel sealing structure includes a cover 1, which is used to connect to the top opening of the barrel body 2. A flexible sealing ring 3 is also provided on the inner side of the cover 1. The bottom of the flexible sealing ring 3 is tilted outward and abuts against the top of the opening of the barrel body 2. A vent cavity 11 is also provided at the bottom of the cover 1. A vent plate 4 is provided in the vent cavity 11. The vent plate 4 is slidably connected to the inner wall of the vent cavity 11, and the sliding direction is the height direction of the cover 1.

[0034] Reference Figure 2 and Figure 3 In the embodiment of the present application, the cover 1 is sleeved over the opening of the barrel 2 and is threadedly connected to the opening of the barrel 2. In the embodiment of the present application, the flexible sealing ring 3 is made of rubber, and the top of the flexible sealing ring 3 is fixedly connected to the inner top wall of the cover 1 by gluing. In other embodiments, when the flexible sealing ring 3 abuts the top of the opening of the barrel 2, the outer side of the flexible sealing ring 3 also abuts the inner wall of the cover 1, thereby increasing the stability of the flexible sealing ring 3.

[0035] Reference Figure 2 and Figure 3 The top of the cover 1 is also provided with an air outlet 12, which communicates with the chamber within the cover 1. The cover 1 is also provided with a sealing mechanism 5, which includes a sealing cover 51 and a drive assembly 52. ​​The drive assembly 52 includes a drive column 521, which is integrally formed with the air release plate 4 and abuts against the outer wall and the inner wall of the cover 1. It is slidably connected to the cover 1, and the sliding direction is the axial direction of the cover 1.

[0036] Reference Figure 2 and Figure 3 A vent 41 is formed through the bottom of the air-release plate 4 and extends upward to the top of the drive post 521, thereby penetrating the air-release plate 4 and the drive post 521. The vent 41 is connected to the air outlet 12. A return spring 6 is also sleeved around the bottom of the drive post 521. The top end of the return spring 6 abuts against the inner wall of the cover 1, and the bottom end of the return spring 6 abuts against the top of the air-release plate 4.

[0037] Reference Figure 2 and Figure 3 A vent column 7 is also disposed within the vent opening 41. The top of the vent column 7 extends beyond the top of the drive column 521, is bent, and is integrally formed with the inner wall of the cover 1. The sidewalls of the vent column 7 are in contact with the inner wall of the drive column 521. The bottom end of the vent column 7 is higher than the bottom end of the air vent plate 4, and a plurality of air inlets 71 are formed on the bottom sidewalls of the vent column 7.

[0038] Reference Figure 2 and Figure 3 An air inlet cavity 72 is also provided at the top of the vent column 7, and the bottom of the air inlet cavity 72 is connected to each air inlet port 71, so that when the air plate 4 slides, the bottom end of the vent column 7 can extend out of the bottom of the vent port 41, so that the gas in the barrel body 2 enters the air inlet cavity 72 through the air inlet port 71, and then enters the air outlet 12 through the air inlet cavity 72.

[0039] Reference Figure 2 and Figure 3The sealing cover 51 is disposed within the air outlet 12 and is threadedly connected to the inner wall of the air outlet 12 to seal the air outlet 12. The top of the sealing cover 51 extends beyond the air outlet 12 and has a diameter greater than that of the air outlet 12. The sealing cover 51 abuts against the top wall of the cover body 1. Several air outlet grooves 511 are also defined on the top sidewall of the sealing cover 51. When the sealing cover 51 abuts against the top wall of the cover body 1, the air outlet grooves 511 are located within the air outlet 12, thereby sealing the air outlet grooves 511 against the inner wall of the air outlet 12.

[0040] Reference Figure 2 and Figure 3 The bottom of the sealing cover 51 is also provided with an opening, which is in communication with each of the air outlet grooves 511. The top end of the driving column 521 extends into the opening of the sealing cover 51, so that when the top of the sealing cover 51 is screwed out of the cover body 1, so that the air outlet grooves 511 on the sealing cover 51 are exposed outside the cover body 1, the gas that enters the air inlet cavity 72 of the vent column 7 through the air inlet 71 can enter the opening of the sealing cover 51, then enter the air outlet grooves 511 through the opening of the sealing cover 51, and finally pass through the air outlet grooves 511 to the outside.

[0041] Reference Figure 3 and Figure 4 Two spiral grooves 512 are formed on the inner sidewall of the sealing cover 51. The two spiral grooves 512 have the same rotation direction, and the axes of the two spiral grooves 512 are the axis of the sealing cover 51. Two driving parts 5211 are also provided on the top of the driving column 521. The two driving parts 5211 are provided in a one-to-one correspondence with the two spiral grooves 512, and each driving part 5211 is integrally formed with the driving column 521. One end of each driving part 5211 extends into the corresponding spiral groove 512, and the end portion is configured as a cylinder, so that the outer wall of the cylinder abuts against the inner wall of the corresponding spiral groove 512, thereby driving the sealing cover 51.

[0042] Reference Figure 2 、 Figure 3 and Figure 4 In the initial state, the air-discharging plate 4 is at the bottom of its sliding path. The bottom of the vent column 7 does not extend beyond the vent opening 41 on the air-discharging plate 4, and the sealing cover 51 seals the air outlet 12. When the gas pressure within the barrel 2 increases, the gas pushes the air-discharging plate 4 upward, compressing the return spring 6. The air-discharging plate 4 then slides relative to the vent column 7, gradually approaching the bottom of the air-discharging plate 4.

[0043] Reference Figure 2 、 Figure 3 and Figure 4During this process, the driving portion 5211 on the driving column 521 is displaced, causing the driving column 521 to be displaced within the spiral groove 512 on the sealing cover 51, thereby causing the sealing cover 51 to rotate. During this process, the top of the sealing cover 51 is gradually rotated out of the air outlet 12, thereby allowing the air outlet groove 511 on the sealing cover 51 to communicate with the outside world. When the air inlet 71 on the vent column 7 moves out of the bottom of the clearance frame, the gas in the barrel 2 enters the air inlet cavity 72 through the air inlet 71, then enters the opening of the sealing cover 51 through the air inlet cavity 72, and finally exits through the air outlet groove 511 on the sealing cover 51.

[0044] Reference Figure 2 and Figure 3 The drive column 521 also has two ventilation grooves 8 formed along its longitudinal middle sidewall, located on opposite sides of the drive column 521. Each ventilation groove 8 communicates with the vent 41 within the drive column 521. The top of the ventilation column 7 also has two additional holes 73, each of which communicates with the air inlet cavity 72. The additional holes 73 correspond to the ventilation grooves 8 one-to-one, and after the drive column 521 slides, the additional holes 73 communicate with the ventilation grooves 8.

[0045] Reference Figure 2 and Figure 3 The cover 1 is further provided with two additional channels 13, each corresponding to the additional holes 73. One end of each additional channel 13 is at the same height as the end of the corresponding additional hole 73, so that after the drive column 521 slides, the additional hole 73 can communicate with the additional channel 13 through the vent groove 8.

[0046] Reference Figure 2 、 Figure 3 and Figure 5 The other end of each additional channel 13 extends upward and extends outside the cover body 1, thereby communicating with the outside world. The sealing mechanism 5 also includes a sealing plate 53 and a linkage assembly 54. In this embodiment of the present application, there are two sealing plates 53 and two linkage assemblies 54, each of which is provided in a one-to-one correspondence. The sealing plates 53 correspond to the additional channels 13 and are located at the top of the additional channels 13, thereby separating and sealing the additional channels 13.

[0047] Reference Figure 3 and Figure 5 One end of each sealing plate 53 is pivotally connected to the cover body 1 via a pin, and its cross-sectional area is larger than the area of ​​the additional channel 13. Two extensions 9 extend downward from the top of the sealing cover 51, and are integrally formed with the sealing cover 51. Each extension 9 is cylindrical. The top wall of the cover body 1 also has an annular groove for receiving the extensions 9.

[0048] Reference Figure 3 and Figure 5 Each linkage assembly 54 includes a linkage frame 541. One end of each linkage frame 541 is sleeved on the corresponding extension portion 9 and abuts against the outer wall of the extension portion 9, thereby being slidably and rotationally connected to the extension portion 9, and the sliding direction of the linkage frame 541 is the axial direction of the extension portion 9. The other end of each linkage frame 541 is rotationally connected to the end of the corresponding sealing plate 53 via a pin, and the rotation point is different from the rotation point of the sealing plate 53 itself.

[0049] Reference Figure 2 、 Figure 3 and Figure 5 In the initial state, that is, when the gas plate 4 is at the bottom of its own sliding path, each sealing plate 53 seals the sealing channel. At this time, the vent groove 8 on the driving column 521 is located below the additional channel 13. When the gas plate 4 moves upward, the driving column 521 drives the sealing cover 51 to rotate through the linkage portion, and the sealing cover 51 drives the linkage frame 541 to move, so that the linkage frame 541 drives the sealing plates 53 to gradually rotate, so that the sealing plates 53 gradually release the seal on the additional channel 13. When the additional hole 73, the vent groove 8 and the additional channel 13 are connected, the sealing plates 53 completely release the seal on the additional channel 13, allowing the gas in the barrel body 2 to smoothly pass through the additional channel 13 to the outside.

[0050] The principle behind the sealing structure for a fluorinated barrel according to the present embodiment is as follows: When lid 1 is screwed onto the top opening of barrel 2, flexible sealing ring 3 within lid 1 abuts against the top of the opening, reducing the chance of liquid migrating into the threaded connection. Subsequently, as the gas pressure within barrel 2 increases, causing the gas to push upward against air-discharging plate 4, vent column 7 gradually approaches the bottom of air-discharging plate 4.

[0051] During this process, the driving portion 5211 on the driving column 521 is displaced, causing the driving column 521 to be displaced within the spiral groove 512 on the sealing cover 51, thereby rotating the sealing cover 51 and gradually rotating the top of the sealing cover 51 out of the air outlet 12, thereby connecting the air outlet groove 511 on the sealing cover 51 to the outside world. During this process, the driving column 521 drives the sealing cover 51 to rotate through the linkage portion, which in turn drives the linkage frame 541 to be displaced, causing the linkage frame 541 to gradually rotate the sealing plate 53, thereby gradually releasing the seal on the additional channel 13.

[0052] When the air inlet 71 on the vent column 7 is moved out of the bottom of the clearance frame, the additional hole 73, the vent groove 8 and the additional channel 13 are connected, and the gas in the barrel body 2 enters the air inlet cavity 72 through the air inlet 71, and then enters the opening and sealing channel of the sealing cover 51 from the air inlet cavity 72, and is discharged through the sealing channel and the air outlet groove 511 on the sealing cover 51.

[0053] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A fluorinated barrel sealing structure, comprising a cover (1), wherein the cover (1) is used to connect with the top opening of a barrel (2), and is characterized in that: A flexible sealing ring (3) is also provided on the inner side of the cover body (1), the bottom of the flexible sealing ring (3) is tilted outward and abuts against the top of the opening of the barrel body (2), and a ventilation cavity (11) is also provided on the bottom of the cover body (1), and an air-release plate (4) is provided in the ventilation cavity (11), and the air-release plate (4) is slidably connected to the inner wall of the ventilation cavity (11), and the sliding direction is the height direction of the cover body (1).

2. A fluorination barrel sealing structure according to claim 1, characterized in that: The bottom of the air-discharging plate (4) is also provided with an air vent (41), and the cover body (1) is also provided with an air vent column (7), the bottom end of the air vent column (7) extends into the air vent (41), and the side wall of the air vent column (7) abuts against the inner side wall of the air vent (41), and an air inlet (71) is also provided on the side wall of the bottom of the air vent column (7), one end of the air inlet (71) extends into the air vent column (7), and both extend upward and are connected with the outside.

3. A fluorination barrel sealing structure according to claim 2, characterized in that: An air outlet (12) is provided on the top of the cover body (1), and the air inlet (71) on the vent column (7) is connected to the outside through the air outlet (12). A sealing mechanism (5) is also provided on the cover body (1), and the sealing mechanism (5) includes a sealing cover (51) and a driving assembly (52). The sealing cover (51) is threadedly connected to the inner side wall of the air outlet (12) to close the air outlet (12). The air plate (4) drives the sealing cover (51) to rotate through the driving assembly (52).

4. A fluorination barrel sealing structure according to claim 3, characterized in that: The bottom of the sealing cover (51) is provided with an opening, and the side wall of the sealing cover (51) is provided with a spiral groove (512). The driving assembly (52) includes a driving column (521), and the driving column (521) is connected to the top of the air release plate (4). The top of the driving column (521) extends into the opening of the sealing cover (51). A driving part (5211) is further extended from the top of the driving column (521), and the driving part (5211) extends into the spiral groove (512) and abuts against the inner wall of the spiral groove (512).

5. The fluorination barrel sealing structure according to claim 4, characterized in that: A ventilation groove (8) is also provided on the side wall of the driving column (521), and an additional channel (13) is also provided on the cover body (1). The ventilation groove (8) is communicated with the outside world through the additional channel (13). An additional hole (73) is also provided on the top of the ventilation column (7). The ventilation groove (8) on the driving column (521) is used to communicate with the air inlet (71) through the additional hole (73) after displacement. The sealing mechanism (5) also includes a sealing plate (53) and a linkage assembly (54). The sealing plate (53) is used to seal the additional channel (13). One end of the sealing plate (53) is rotatably connected to the cover body (1), and the linkage assembly (54) is used to drive the sealing plate (53) to rotate.

6. The fluorination barrel sealing structure according to claim 5, characterized in that: The linkage assembly (54) comprises a linkage frame (541), one end of the linkage frame (541) is rotatably connected to the sealing plate (53), and the rotation point is different from the rotation point of the sealing plate (53) itself, and the other end of the linkage frame (541) is rotatably connected to one side of the sealing cover (51).

7. The fluorination barrel sealing structure according to claim 6, characterized in that: An extension portion (9) is further extended downward from the top of the sealing cover (51), and the linkage frame (541) is sleeved on the extension portion (9) and is rotationally connected to the extension portion (9) and slidingly connected to the extension portion (9).

8. The fluorination barrel sealing structure according to claim 5, characterized in that: The number of the ventilation groove (8), the additional channel (13), the additional hole (73) and the sealing plate (53) is set to be several and arranged in a one-to-one correspondence, and each sealing plate (53) is used to seal the corresponding additional channel (13).

9. The fluorination barrel sealing structure according to claim 4, characterized in that: An air outlet groove (511) is also provided on the top side wall of the sealing cover (51), and the air outlet groove (511) is communicated with an opening in the sealing cover (51), and the air inlet (71) on the vent column (7) is communicated with the air outlet groove (511) on the sealing cover (51).

10. The fluorination barrel sealing structure according to claim 1, characterized in that: The driving column (521) is also provided with a return spring (6), one end of the return spring (6) abuts against the air release plate (4), and the other end of the return spring (6) abuts against the inner wall of the cover body (1).

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