A can end construction and a sealed can

Abstract

The application provides a tank mouth sealing structure and a sealed tank. The tank mouth sealing structure comprises a tank mouth and a sealing mechanism assembled in the tank mouth. The sealing mechanism comprises a sealing cover assembly, a rotating shaft assembly and a sliding block assembly. The sealing cover assembly is sealingly matched with the tank mouth. The rotating shaft assembly is rotatably assembled on the sealing cover assembly. The sliding block assembly comprises a plurality of sliding blocks movably connected with the rotating shaft assembly around the rotating shaft assembly. The sealing cover assembly guides the plurality of sliding blocks in the radial direction. When the rotating shaft assembly rotates, the plurality of sliding blocks are driven to extend to a locking position for locking cooperation with the inner wall of the tank mouth in the radial direction, or are driven to contract to an unlocking position for being separated from the tank mouth. The plurality of sliding blocks can lock the sealing mechanism in the tank mouth in the locking position, so as to ensure the sealing property of the tank mouth and improve the safety and reliability. The installation and dismounting of the sealing mechanism can be realized by rotating the rotating shaft assembly, and the operation is simple and convenient.

Description

Technical Field

[0001] This application relates to the field of can opening sealing technology, and in particular to a can opening sealing structure and a sealed can. Background Technology

[0002] Liquefied natural gas (LNG) storage tanks are specialized products for storing LNG. They are classified as special equipment, specifically Class III pressure vessels. Manufacturing processes include flaw detection, hydrostatic and pneumatic pressure testing, on-site inspection by the technical supervision bureau, issuance of a pressure vessel inspection certificate, and external rust removal and painting. LNG storage tanks undergo rigorous quality assessments regarding the materials of pressure-bearing components, external dimensions and weld quality, operational quality, installation quality, internal devices, and safety accessories.

[0003] Currently, liquefied natural gas storage tanks are generally sealed using a flange and sealing ring solution. However, this sealing solution is too simple in structure, prone to leakage, and poses safety hazards. Summary of the Invention

[0004] This application aims to solve the sealing problems existing in the prior art by providing a can opening sealing structure and a sealed can.

[0005] According to a first aspect of this application, a can opening sealing structure is provided, including a can opening and a sealing mechanism assembled within the can opening, the sealing mechanism comprising:

[0006] A sealing cap assembly that seals with the can opening;

[0007] A rotating shaft assembly, which is mounted on the sealing cover assembly and is rotatable relative to the sealing cover assembly about a rotation axis;

[0008] A slider assembly comprising a plurality of sliders distributed around the pivot assembly, the plurality of sliders being movably connected to the pivot assembly;

[0009] The sealing cap assembly is configured to guide the plurality of sliders in the radial direction;

[0010] The rotating shaft assembly is configured to, when rotated, cause the plurality of sliders to extend radially to a locked position or retract to an unlocked position;

[0011] The slider engages with the inner wall of the can opening in the locked position and can disengage from the can opening in the unlocked position.

[0012] In one embodiment of this application, the inner wall of the can opening extends axially, and the can opening forms a constricted structure with the outer end smaller than the inner end.

[0013] In one embodiment of this application, when in the locked position, the outer surfaces of the plurality of sliders form an arc surface adapted to the shape of the inner wall of the can opening;

[0014] And / or,

[0015] A sealing element is provided between the sealing mechanism and the inner wall of the can opening, and the sealing element is pressed when the plurality of sliders extend to the locking position.

[0016] In one embodiment of this application, a radial engagement structure is provided between adjacent sliders, and the adjacent sliders engage with each other in the radial direction through the radial engagement structure when in the locked position.

[0017] In one embodiment of this application, a plurality of sliders are movably connected to the rotating shaft assembly via connecting rods. The plurality of sliders and the corresponding connecting rods have a certain amount of mobility to move relative to each other in the radial direction. The rotating shaft assembly is configured to drive the connecting rods to move a certain distance in the radial direction when rotated, thereby causing the corresponding sliders to extend or retract.

[0018] The plurality of sliders includes a plurality of alternating first sliders and a plurality of second sliders, wherein an elastic member is disposed between the first slider and the pivot assembly, the elastic member being configured to drive the first slider to extend radially from the unlock position.

[0019] In one embodiment of this application, a plurality of sliders are respectively provided with relief grooves, one end of the connecting rod is movably restricted in the relief groove, and the connecting rod is capable of moving in the relief groove in the radial and circumferential directions;

[0020] And / or,

[0021] A ball-head plunger is provided between each of the first sliders and the sealing cover assembly. When the first slider extends to the locking position, it is locked with the sealing cover assembly by the ball-head plunger.

[0022] And / or,

[0023] Multiple links are configured to extend in the radial direction when pushing the corresponding slider to the locked position.

[0024] In one embodiment of this application, the sealing cap assembly includes a first cap body near the outer end of the can opening and a second cap body near the inner end of the can opening; the rotating shaft assembly is rotatably engaged with the first cap body and the second cap body, and a plurality of sliders are engaged between the first cap body and the second cap body, and the first cap body and the second cap body are provided with guide rails that respectively engage with the plurality of sliders.

[0025] In one embodiment of this application, the rotating shaft assembly includes:

[0026] A rotating shaft is movably connected to a plurality of the sliders via connecting rods, and the outer end of the rotating shaft extends outward through the first cover.

[0027] A bushing is rotatably fitted onto the outside of the rotating shaft. The inner end of the bushing is fixedly connected to the second cover. The bushing is provided with an extension hole for avoiding the connecting rod, and the extension hole extends along the circumferential direction.

[0028] A fixed cover is fixedly connected to the outer end of the bushing and pressed against the outside of the first cover body.

[0029] In one embodiment of this application, a protective tube for installing sensor cables is provided inside the rotating shaft, and the protective tube is sealed to the second cover.

[0030] And / or,

[0031] A detachable and fixed pressure ring is provided on the outside of the can opening. The pressure ring presses against the outside of the first cover body, and the inner hole of the pressure ring avoids the outer end of the fixed cover and the rotating shaft.

[0032] According to a second aspect of this application, a sealed container is also provided, including a container body, the container body including the aforementioned container opening sealing structure.

[0033] One beneficial effect of this application is that the sealing mechanism assembled inside the can opening can seal the can opening. Multiple sliders of the sealing mechanism are movably connected to the rotating shaft assembly. The sealing cover assembly guides the sliders in the radial direction. Rotating the rotating shaft assembly can drive multiple sliders to extend or retract radially. When the multiple sliders retract to the unlocked position, the sealing mechanism can be installed in the can opening. When extended to the locked position, it fits tightly with the inner wall of the can opening, locking the sealing mechanism in the can opening, ensuring the sealing performance of the can opening, and improving safety and reliability. It can maintain the sealing effect under high pressure. By controlling the forward or reverse rotation of the rotating shaft assembly, the installation and disassembly of the sealing mechanism can be realized, which is simple and convenient to operate.

[0034] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0036] Figure 1 This is a cross-sectional view of a sealed container provided in one embodiment of this application;

[0037] Figure 2 yes Figure 1 Enlarged view of section A;

[0038] Figure 3 This is a top view of the slider assembly and the rotating shaft assembly of the can opening sealing structure provided in an embodiment of this application when in the locked position;

[0039] Figure 4 This is an exploded view of a can opening sealing structure provided in an embodiment of this application;

[0040] Figure 5 This is an exploded view of the first slider and the corresponding connecting rod of the can opening sealing structure provided in an embodiment of this application;

[0041] Figure 6 This is an exploded view of the second slider and corresponding connecting rod of the can opening sealing structure provided in one embodiment of this application;

[0042] Figure 7 This is a cross-sectional view of the position of the clearance groove of the first slider in the initial position of the can opening sealing structure provided in an embodiment of this application;

[0043] Figure 8 This is a cross-sectional view of the position of the elastic component in the initial position of the can opening sealing structure provided in an embodiment of this application;

[0044] Figure 9 This is a cross-sectional view of the position of the clearance groove of the second slider in the initial position of the can opening sealing structure provided in an embodiment of this application;

[0045] Figure 10 This is a cross-sectional view of the position of the clearance groove of the second slider in the unlocked position of the can opening sealing structure provided in an embodiment of this application;

[0046] Figure 11 This is a cross-sectional view of the position of the clearance groove of the first slider in the unlocked position of the can opening sealing structure provided in an embodiment of this application;

[0047] Figure 12 This is a cross-sectional view of the position of the clearance groove of the first slider in the locked position of a can opening sealing structure provided in an embodiment of this application;

[0048] Figure 13 This is a cross-sectional view of the position of the clearance groove of the second slider in the locked position of the can opening sealing structure provided in an embodiment of this application;

[0049] Figure 14 This is an isometric view of a sealed container provided in one embodiment of this application.

[0050] Figures 1 to 14 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows:

[0051] 1. Tank body; 11. Tank opening; 12. Pressure ring;

[0052] 2. Sealing cap assembly; 21. First cap body; 22. Second cap body; 23. Sealing ring;

[0053] 211, First guide rail; 221, Second guide rail; 222, Stepped hole;

[0054] 3. Shaft assembly; 31. Shaft; 32. Bushing; 33. Fixing cover; 34. Cable sheath;

[0055] 311. Drive end; 321. Extension hole; 322. Arc-shaped component;

[0056] 4. Slider assembly; 41. Slider; 42. Radial engagement structure; 43. Relief groove; 44. Limiting block; 45. Fastening screw;

[0057] 411. First slider; 412. Second slider;

[0058] 421. First step groove; 422. Second step groove;

[0059] 431. Radial guide section; 432. Oblique guide section;

[0060] 433. Assembly port; 434. Extension port;

[0061] 4101, First mating groove; 4102, Second mating groove; 4110, Self-locking hole;

[0062] 4301, First clearance slot; 4302, Second clearance slot;

[0063] 441. Groove;

[0064] 5. Connecting rod; 51. First connecting end; 52. Second connecting end;

[0065] 511. Fixed pin; 521. Short shaft;

[0066] 6. Elastic components; 61. Guide posts;

[0067] 7. Ball-head plunger;

[0068] 8. Seals;

[0069] 9. Sensors; 91. Pipelines. Detailed Implementation

[0070] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0071] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0072] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0073] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0074] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0075] In this article, terms such as "upper," "lower," "inner," and "outer" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0076] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0077] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0078] In this document, unless otherwise stated, "multiple" means two or more.

[0079] This application provides a can opening sealing structure, applied to the can body 1 of a sealed can. For example... Figure 1 and Figure 2 As shown, the can opening sealing structure includes a can opening 11 and a sealing mechanism assembled inside the can opening 11. The sealing mechanism includes a sealing cover assembly 2, a rotating shaft assembly 3, and a slider assembly 4.

[0080] The sealing cap assembly 2 is sealed to the can opening 11 to achieve a sealing effect. The rotating shaft assembly 3 is mounted on the sealing cap assembly 2 and can rotate relative to the sealing cap assembly 2 about its rotation axis. Specifically, one end of the rotating shaft assembly 3 faces inward to the can opening 11, and the other end faces outward to the can opening 11. The rotation axis of the rotating shaft assembly 3 can be its own axis.

[0081] The slider assembly 4 includes a plurality of sliders 41 distributed around the pivot assembly 3. Each slider 41 is movably connected to the pivot assembly 3. The sealing cap assembly 2 is configured to guide the plurality of sliders 41 in the radial direction.

[0082] Specifically, the inner sides of the plurality of sliders 41 face the rotating shaft assembly 3, and the outer sides of the plurality of sliders 41 face the inner wall of the can opening 11. The radial direction is the direction toward or away from the rotating shaft assembly 3, and the plurality of sliders 41 can move along the sealing cap assembly 2 toward or away from the rotating shaft assembly 3, respectively.

[0083] The rotating shaft assembly 3 is configured to drive multiple sliders 41 to extend to the locking position or retract to the unlocking position in the radial direction when rotated. The sliders 41 are locked to the inner wall of the can opening 11 in the locking position and can be disengaged from the can opening 11 or inserted into the can opening 11 in the unlocking position.

[0084] During operation, rotating the shaft assembly 3 in the forward direction causes multiple sliders 41 to extend outward, while rotating in the reverse direction causes multiple sliders 41 to retract inward. The forward direction can be clockwise or counterclockwise, and the reverse direction is either counterclockwise or clockwise, which is the opposite of the forward direction.

[0085] The rotating shaft assembly 3 is driven to rotate by an external force. The rotating shaft assembly 3 can be connected to a drive device and rotate by the torque provided by the drive device. The rotating shaft assembly 3 can be directly connected to the output end of the drive device, or connected to the output end of the drive device through a transmission mechanism such as a crank and connecting rod; the rotating shaft assembly 3 can also be driven to rotate by human power, which is not limited in this application.

[0086] The can opening 11 is sealed by the sealing cap assembly 2. By controlling the rotation of the rotating shaft assembly 3, multiple sliders 41 extend to the locking position. The sliders 41 can tightly fit with the inner wall of the can opening 11, locking the sealing mechanism in the can opening 11, ensuring the sealing performance between the sealing cap assembly 2 and the can opening 11, and improving safety and reliability, maintaining the sealing effect under high pressure. Furthermore, by controlling the forward or reverse rotation of the rotating shaft assembly 3, the sealing mechanism can be installed and disassembled, making operation simple and convenient.

[0087] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the inner wall of the can opening 11 is designed to extend axially. The can opening 11 forms a constricted structure with the outer end smaller than the inner end.

[0088] The radial dimension of the outer end of the can opening 11 is smaller than the radial dimension of its inner end. When the multiple sliders 41 are retracted to the unlocked position, their radial dimension is smaller than the outer end of the can opening 11, allowing them to be inserted into the can opening 11. When the multiple sliders 41 are extended to the locked position, their radial dimension is larger than the outer end of the can opening 11, preventing them from detaching from the can opening 11 and achieving self-locking with the can opening 11. This increases the safety of the sealing mechanism and ensures the sealing effect. Furthermore, when the pressure inside the can body 1 is high, it generates outward pressure on the sealing mechanism, causing the multiple sliders 41 to fit more tightly against the inner wall of the can opening 11.

[0089] In detail, such as Figure 2 As shown, the inner wall of the can opening 11 forms a conical structure, and the inclination angle of the conical structure is α. The angle α can be arbitrarily set, such as 1°, 2°, 3°, 5°, etc., and this application does not limit it in this regard. Figure 2 In one specific embodiment shown, α is set to 2°.

[0090] Furthermore, the inner end of the tank opening 11 may be provided with a stepped surface extending radially inward. The stepped surface limits the assembly position of the sealing mechanism to prevent the sealing mechanism from falling into the tank body 1.

[0091] In some embodiments of this application, such as Figure 3 As shown, a radial engaging structure 42 is provided between adjacent sliders 41, and the adjacent sliders 41 are engaged with each other in the radial direction by the radial engaging structure 42 when they are in the locked position. Figure 3 In the specific embodiment shown, the radial engagement structure 42 can be configured as a stepped groove structure with a concave-convex fit, and adjacent sliders 41 can interact with each other in the radial direction.

[0092] In some embodiments of this application, such as Figure 2 and Figure 4 As shown, multiple sliders 41 are movably connected to the rotating shaft assembly 3 via connecting rods 5. When the rotating shaft assembly 3 rotates, the connecting rods 5 pull the sliders 41 inward to retract, or push the sliders 41 outward to extend.

[0093] In detail, such as Figure 5 and Figure 6 As shown, the two opposite ends of the connecting rod 5 are a first connecting end 51 and a second connecting end 52, respectively. The first connecting end 51 of the connecting rod 5 is movably connected to the rotating shaft assembly 3, and the second connecting end 52 is movably connected to the corresponding slider 41. When the rotating shaft assembly 3 rotates, it drives the first connecting end 51 of the connecting rod 5 to rotate around the rotating shaft assembly 3, and the second connecting end 52 of the connecting rod 5 moves radially under the restriction of the slider 41.

[0094] In some embodiments of this application, the plurality of sliders 41 and the corresponding connecting rods 5 have a certain amount of mobility to move relative to each other in the radial direction, that is, the corresponding sliders 41 and the connecting rods 5 can move relative to each other in the radial direction by a certain distance. The rotating shaft assembly 3 is configured to drive the connecting rods 5 to move a certain distance in the radial direction when rotated, thereby causing the corresponding sliders 41 to extend or retract.

[0095] When the rotating shaft assembly 3 rotates, it first drives the connecting rod 5 to move. The second connecting end 52 of the connecting rod 5 moves radially a certain distance, and then drives the slider 41 to move radially. The allowable movement between the slider 41 and the connecting rod 5 is less than the stroke of the slider 41 relative to the sealing cover assembly 2.

[0096] In some specific embodiments of this application, such as Figure 3 and Figure 4 As shown, the plurality of sliders 41 include a plurality of first sliders 411 and a plurality of second sliders 412 that are alternately distributed. Among them, an elastic member 6 is provided between the first slider 411 and the rotating shaft assembly 3, and the elastic member 6 is configured to drive the first slider 411 to extend radially from the unlocked position.

[0097] The elastic component 6 can be a coil spring, a sheet spring, etc. For example... Figure 6 In the specific embodiment shown, the elastic component 6 is a compression spring, with one end of the spring engaging with the first slider 411 and the other end engaging with the rotating shaft assembly 3. The elastic component 6 can be mounted on the first slider 411 via a guide post 61, one end of which is threaded to the first slider 411 for easy assembly and disassembly. The guide post 61 extends radially and is mounted within the elastic component 6, providing guidance for the elastic component 6.

[0098] like Figure 7 and Figure 8 As shown, when the rotating shaft assembly 3 is not driven by an external force, the multiple first sliders 41 are respectively positioned in an outwardly extended position under the drive of the elastic component 6. At this time, the first sliders 41 are in their initial positions.

[0099] In one specific embodiment of this application, such as Figure 5 and Figure 6 As shown, each of the multiple sliders 41 is provided with a relief groove 43, and one end of the connecting rod 5 is movably restricted in the relief groove 43. The connecting rod 5 can move in the radial direction and the circumferential direction in the relief groove 43.

[0100] To make this application clear and concise, the rotating shaft assembly 3 is defined as causing the slider 41 to retract when rotating in the forward direction and causing the slider 41 to extend when rotating in the reverse direction. Figures 7 to 13 From this perspective, the forward direction is clockwise, and the reverse direction is counterclockwise.

[0101] like Figure 9 , Figure 10 and Figure 11 As shown, when the rotating shaft assembly 3 is subjected to force and rotates in the forward direction, it drives the connecting rod 5 to move a certain distance, thereby overcoming the force exerted by the elastic component 6 on the first slider 411 and causing multiple first sliders 411 to retract, while simultaneously causing multiple second sliders 412 to retract. When the multiple sliders 41 retract to the unlocked position, the sealing mechanism can be inserted into or removed from the can opening 11.

[0102] After the external force on the rotating shaft assembly 3 is removed, the elastic component 6 pushes the first slider 411 out through the elastic restoring force, returning it to the initial position.

[0103] like Figure 12 and Figure 13 As shown, when the rotating shaft assembly 3 is subjected to reverse rotation, it pushes the corresponding first slider 411 and second slider 412 to move via the connecting rod 5. Specifically, the connecting rod 5 corresponding to the second slider 412 moves radially along the relief groove 43 via the second connecting end 52, and after moving to the bottom of the relief groove 43, it pushes the corresponding second slider 412 to extend radially. When the second connecting end 52 of the connecting rod 5 corresponding to the first slider 411 also moves to the bottom of the relief groove 43, it pushes the corresponding first slider 411 to extend radially from its initial position. When multiple first sliders 411 and multiple second sliders 412 extend to the locking position, they engage with the inner wall of the can opening 11 and are locked within the can opening 11.

[0104] In detail, such as Figure 6 As shown, the first connecting end 51 of the connecting rod 5 can be provided with a fixing pin 511, and the second connecting end 52 can be provided with a short shaft 521. The short shaft 521 and the fixing pin 511 extend in the same direction as the rotating shaft assembly 3. The first connecting end 51 can be provided with a mounting hole, and the fixing pin 511 is detachably fitted into the mounting hole of the first connecting end 51. The short shaft 521 can be fixedly set in the second connecting end 52. The first connecting end 51 is hinged to the rotating shaft assembly 3 through the fixing pin 511, and the second connecting end 52 is movably fitted into the relief groove 43 of the corresponding slider 41 through the short shaft 521.

[0105] In detail, such as Figure 6 As shown, the opening of the relief groove 43 includes a connecting assembly port 433 and an extension port 434, with the extension port 434 extending along the circumferential direction of the rotating shaft assembly 3. A limiting block 44 is fixedly connected to the assembly port 433 by a fastening screw 45. The limiting block 44 restricts the short shaft 521 on the second connecting end 52 of the connecting rod 5 within the relief groove 43, preventing the short shaft 521 from disengaging from the relief groove 43. The limiting block 44 is provided with a groove 441 communicating with the extension port 434, and the connecting rod 5 extends out of the relief groove 43 from the groove 441 and the extension port 434.

[0106] The connecting rod 5 is inserted into the relief groove 43 through the assembly port 433. The detachable and detachable limit block 44 enables the connection rod 5 to be disassembled and assembled with the slider 41. When the rotating shaft assembly 3 rotates, it drives the connecting rod 5 to move simultaneously in the radial and circumferential directions. The connecting rod 5 can move radially in the relief groove 43 and rotate into the extension port 434.

[0107] Furthermore, such as Figure 7 and Figure 9As shown, the clearance groove 43 includes a radial guide portion 431 and an oblique guide portion 432. The radial guide portion 431 extends radially, and the oblique guide portion 432 is inclined relative to the radial guide portion 431. The radial guide portion 431 guides and limits the short shaft 521 of the second connecting end 52 of the connecting rod 5. The short shaft 521 is assembled in the radial guide portion 431 and moves radially within it. The portion of the connecting rod 5 near the short shaft 521 can rotate within the oblique guide portion 432.

[0108] When the corresponding slider 41 and connecting rod 5 move relative to each other, the radial guide portion 431 and the oblique guide portion 432 guide and limit the second connecting end 52 of the connecting rod 5, and provide space for radial displacement and rotation in the circumferential direction. Furthermore, the radial guide portion 431 and the oblique guide portion 432 also limit the angle of relative rotation between the rotating shaft assembly 3 and the slider 41, thereby limiting the forward rotation of the rotating shaft assembly 3 to cause the slider 41 to retract, and the reverse rotation to cause the slider 41 to extend.

[0109] In detail, such as Figure 3 As shown, the radial engagement structure 42 between adjacent first sliders 411 and second sliders 412 includes a first stepped groove 421 disposed on the first slider 411 and a second stepped groove 422 disposed on the second slider 412. The first stepped groove 421 is disposed on opposite sides of the first slider 411, and the stepped surface of the first stepped groove 421 faces the direction of the rotating shaft assembly 3; the second stepped groove 422 is disposed on opposite sides of the second slider 412, and the stepped surface of the second stepped groove 422 faces the inner wall of the can opening 11.

[0110] In the locked position, adjacent first sliders 411 and second sliders 412 are engaged with each other via first stepped grooves 421 and second stepped grooves 422. For example... Figure 3 As shown, at this time, the outer surface of the first slider 411 and the outer surface of the second slider 412 form a continuous surface.

[0111] In order for the first slider 411 and the second slider 412, which are locked together in the locked position, to retract, the rotating shaft assembly 3 first drives the multiple second sliders 412 to retract radially when rotating in the opposite direction, so that the second step groove 422 disengages from the first step groove 421, so that the second sliders 412 do not obstruct the retraction of the first slider 411; then it drives the first slider 411 and the second slider 412 to retract radially at the same time.

[0112] Specifically, such as Figure 12 and Figure 13As shown, the clearance groove 43 of the first slider 411 is defined as the first clearance groove 4301, and the clearance groove 43 of the second slider 412 is defined as the second clearance groove 4302. The radial movement margin of the connecting rod 5 in the first clearance groove 4301 is L1, and the radial movement margin of the connecting rod 5 in the second clearance groove 4302 is L2, and L1 > L2.

[0113] Therefore, when the rotating shaft assembly 3 rotates in the opposite direction, it drives multiple connecting rods 5 to move synchronously. After moving radially by L2, it pulls the second slider 412 to contract radially. After continuing to move radially to a displacement of L1, it pulls the first slider 411 and the second slider 412 to contract synchronously.

[0114] like Figure 10 and Figure 11 As shown, when the unlock position is reached, the second slider 412 is located between the first step grooves 421 of the first slider 411 on both sides.

[0115] When the rotating shaft assembly 3 rotates in the forward direction, the first slider 411 first extends radially under the drive of the elastic component 6 to make way for the second slider 412 so as not to obstruct the second slider 412; after the rotating shaft assembly 3 drives the connecting rod 5 to move radially by L2, it pushes the second slider 412 to extend radially. After the connecting rod 5 continues to move radially to a displacement of L1, it pushes the first slider 411 and the second slider 412 to extend synchronously and extend to the locking position to lock with the can opening 11.

[0116] In some specific embodiments of this application, such as Figure 4 As shown, multiple first sliders 411 are respectively provided with ball-head plungers 7 between them and the sealing cover assembly 2. When the first slider 411 extends to the locking position, it locks with the sealing cover assembly 2 through the ball-head plungers 7. That is, the first slider 411 and the sealing cover assembly 2 can achieve self-locking through the ball-head plungers 7, which can restrict the first slider 411 to the locked position, thus improving safety.

[0117] In detail, one of the first slider 411 and the sealing cap assembly 2 is fitted with a ball plunger 7, and the other is provided with a self-locking hole 4110 that mates with the ball plunger 7. As the first slider 411 moves radially along the sealing cap assembly 2, the ball plunger 7 is compressed. When the first slider 411 moves to a position where the ball plunger 7 is directly aligned with the self-locking hole 4110, the ball plunger 7 springs into the self-locking hole 4110.

[0118] like Figure 4 In the specific embodiment shown, the ball plunger 7 is assembled on the sealing cap assembly 2, and the first slider 411 is provided with a self-locking hole 4110. The ball plunger 7 is a standard part well known to those skilled in the art, and its specific structure and principle will not be described in detail.

[0119] In some specific embodiments of this application, such as Figure 3As shown, the slider 41 is configured to adapt to the shape of the inner wall of the can opening 11. In the locked position, the outer surfaces of the multiple sliders 41 form an arc surface that adapts to the shape of the inner wall of the can opening 11. The arc surface of the multiple sliders 41 fits tightly with the inner wall of the can opening 11 to achieve locking, resulting in better sealing and stability.

[0120] In some embodiments of this application, the slider assembly 4 includes at least two first sliders 411 and two second sliders 412, and the number of first sliders 411 and second sliders 412 is equal. For example, there may be two, three, four, five, etc., of first sliders 411 and second sliders 412.

[0121] like Figure 3 and Figure 4 In one specific embodiment shown, the slider assembly 4 includes four first sliders 411 and four second sliders 412, which are evenly distributed around the rotating shaft assembly 3.

[0122] In some embodiments of this application, such as Figure 3 and Figure 4 As shown, to avoid interference between the multiple connecting rods 5, they can be staggered in the axial direction of the rotating shaft assembly 3 to avoid each other. Furthermore, the elastic component 6 can also be staggered in the axial direction with respect to the connecting rods 5 to avoid interference between the elastic component 6 and the connecting rods 5. That is, the connecting rod 5 corresponding to the first slider 411, the connecting rod 5 corresponding to the second slider 412, and the elastic component 6 are distributed on different planes.

[0123] In detail, such as Figure 7 , Figure 8 and Figure 9 As shown, the connecting rods 5 corresponding to the multiple first sliders 411 are distributed on the same cross-section, the connecting rods 5 corresponding to the multiple second sliders 412 are distributed on the same cross-section, and the multiple elastic components 6 are distributed on the same cross-section.

[0124] In some embodiments of this application, such as Figure 3 and Figure 4 As shown, the arc length of the outer surface of the first slider 411 is greater than the arc length of the outer surface of the second slider 412. The first slider 411 has an approximate fan-shaped structure. The radial length of the first slider 411 is greater than the radial length of the second slider 412.

[0125] After the multiple first sliders 411 extend to the locking position, they are limited by the second slider 412 through the radial engagement structure 42 and by the sealing cap assembly 2 through the ball plunger 7, resulting in a better locking effect in the radial direction. Therefore, increasing the outer surface arc length of the first slider 411 allows the slider assembly 4 to mainly bear the radial pressure through the first slider 411, making it more stable after locking and less prone to loosening.

[0126] In some embodiments of this application, such as Figure 12 and Figure 13 As shown, multiple links 5 are configured to extend radially when pushing the corresponding slider 41 to the locked position, supporting the slider 41 radially and preventing it from contracting radially when compressed by radial external force. Specifically, when the first slider 411 and the second slider 412 are in the locked position, they are both supported by the corresponding links 5.

[0127] In some embodiments of this application, such as Figure 2 and Figure 4 As shown, the sealing cap assembly 2 includes a first cap 21 near the outer end of the can opening 11 and a second cap 22 near the inner end of the can opening 11. Multiple sliders 41 engage between the first cap 21 and the second cap 22. Furthermore, a rotating shaft assembly 3 rotatably engages with the first cap 21 and the second cap 22, which are fixed relative to the can opening 11. The first cap 21 and the second cap 22 are provided with guide rails that respectively engage with the multiple sliders 41. The multiple guide rails extend radially, and the multiple sliders 41 slide radially along the rails.

[0128] In detail, the first cover 21 and the second cover 22 can be configured as a disc structure adapted to the can opening 11, and the rotating shaft assembly 3 is fitted at the center position of the first cover 21 and the second cover 22. Holes for assembling the rotating shaft assembly 3 are respectively provided in the middle of the first cover 21 and the second cover 22. The guide rails on the first cover 21 and the second cover 22 can be radially extending grooves, slide rods, protrusions, or other conventional guide structures, and the multiple sliders 41 are respectively provided with structures that mate with the corresponding guide rails.

[0129] like Figure 4 In one specific embodiment shown, the guide rail on the first cover 21 is a first guide rail 211, and the guide rail on the second cover 22 is a second guide rail 221. The first guide rail 211 and the second guide rail 221 are configured with a convex rib structure. One end of the slider 41 is provided with a first mating groove 4101 that mates with the first guide rail 211, and the other end is provided with a second mating groove 4102 that mates with the second guide rail 221.

[0130] Furthermore, the first guide rail 211 has a rectangular cross-section, and the first mating groove 4101 is configured as a matching rectangular groove to facilitate assembly. The second guide rail 221 has a T-shaped cross-section, and the second mating groove 4102 is configured as a matching T-shaped groove to prevent the slider 41 from disengaging from the second guide rail 221.

[0131] In other embodiments, the first guide rail 211 may also be configured as a T-shaped structure, and the first mating groove 4101 may be configured as a matching T-shaped groove. In addition, the first guide rail 211 and the second guide rail 221 may also be configured as dovetail structures, and the first mating groove 4101 and the second mating groove 4102 may be configured as matching dovetail grooves to prevent the slider 41 from disengaging.

[0132] In one embodiment of this application, such as Figure 2 As shown, a sealing element 8 is provided between the sealing mechanism and the inner wall of the can opening 11, thereby sealing the can opening 11. The sealing cap assembly 2 is sealed to the can opening 11 through the sealing element 8. When the multiple sliders 41 extend to the locking position, they can press the sealing element 8, increasing the sealing effect.

[0133] In detail, the sealing element 8 is an integral structure, designed as a cylinder, fitting snugly against the inner wall of the can opening 11 and sleeved on the outside of the sealing mechanism. The end of the sealing element 8 facing outwards from the can opening 11 is open, while the end facing inwards is closed, engaging with the second cover 22. The outer surfaces of the multiple sliders 41 engage with the inner wall of the can opening 11 via the sealing element 8. When the multiple sliders 41 extend to the locked position, they form a continuous arc surface, which compresses the sealing element 8, preventing gaps and achieving a better sealing effect. Furthermore, because the can opening 11 is designed as a constricted structure, the sealing mechanism can further compress the sealing element 8 under the internal pressure of the can body 1, thereby further enhancing the sealing effect.

[0134] In some embodiments of this application, such as Figure 2 and Figure 4 As shown, the rotating shaft assembly 3 includes a rotating shaft 31, a bushing 32, and a fixed cover 33. The rotating shaft 31 is movably connected to multiple sliders 41 via connecting rods 5, and the outer end of the rotating shaft 31 extends outward from the hole in the middle of the first cover 21.

[0135] Specifically, the outer end of the rotating shaft 31 is the drive end 311, which is used to withstand forward or reverse torque. A spline may be provided on the drive end 311 of the rotating shaft 31. A bearing seat that is hinged to the connecting rod 5 may be provided on the side wall of the rotating shaft 31, and the bearing seat and the first connecting end 51 of the connecting rod 5 are hinged by a fixing pin 511.

[0136] The bushing 32 is rotatably fitted onto the outside of the rotating shaft 31, and its inner end is fixedly connected to the second cover 22. The bushing 32 is provided with extension holes 321 for avoiding the connecting rod 5, each extension hole 321 extending circumferentially. Specifically, the extension holes 321 avoid the bearing seat on the side wall of the rotating shaft 31. When the rotating shaft 31 rotates relative to the bushing 32, it drives the first connecting end 51 of the connecting rod 5 to rotate along the corresponding extension hole 321. The two ends of the extension holes 321 can limit the rotation of the connecting rod 5, restricting the rotation angle of the connecting rod 5.

[0137] The fixing cover 33 is fixedly connected to the outer end of the bushing 32 and presses against the outside of the first cover body 21, thus restricting the first cover body 21. The fixing cover 33 can also serve as a handle, allowing the operator to hold the fixing cover 33 with one hand and the drive end 311 of the rotating shaft 31 with the other hand to rotate it, facilitating the application of force. The fixing cover 33 can be designed as a ring structure with anti-slip texture on the outer side. The drive end 311 of the rotating shaft 31 extends from the center of the fixing cover 33.

[0138] For ease of assembly, the bushing 32 includes at least two interlocking arc-shaped components 322. For example... Figure 2 and Figure 4 In the specific embodiment shown, the bushing 32 includes two semi-circular arc-shaped components 322. The edges of the two arc-shaped components 322 can be engaged by a snap-fit ​​structure, which can be mutually engaging stepped grooves. The two side edges of one arc-shaped component 322 are configured as stepped grooves facing outwards, and the two side edges of the other arc-shaped component 322 are configured as stepped grooves facing inwards.

[0139] Furthermore, the fixed cover 33 and the second cover body 22 can serve as fasteners for the bushing 32, fixing the interlocked arc-shaped component 322. The specific fastening methods can be insertion, snap-fit, threaded connection, etc.

[0140] In detail, such as Figure 2 and Figure 4 As shown, when the arc-shaped component 322 is engaged, its outer and inner ends form external thread structures. The inner side of the fixed cover 33 is provided with internal threads, and the second cover 22 is also provided with internal threads. The outer end of the bushing 32 is threadedly connected to the fixed cover 33, and the inner end is threadedly connected to the second cover 22.

[0141] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, a protective tube 34 is installed inside the rotating shaft 31. A sensor 9 can be installed inside the tank 1, with its cable 91 extending out of the tank 1 from the tank opening 11. The protective tube 34 is used to mount the sensor cable 91, and the cable 91 fits tightly with the protective tube 34. The sensor cable 91 can extend out of the tank 1 from the protective tube 34, transmitting data through the cable 91. To ensure a tight seal, the cable 91 and the protective tube 34 can be designed as a single, integrally formed structure.

[0142] Sensor 9 is not limited to pressure sensors, temperature sensors, etc. Of course, the conduit 34 can also be used for pipelines to install other devices as needed. The disassembly and assembly sealing mechanism allows for quick and easy replacement of sensor 9.

[0143] In detail, such as Figure 2 and Figure 4 As shown, the protective tube 34 can rotate relative to the rotating shaft 31. One end of the protective tube 34 extends from the outer end of the rotating shaft 31, and the other end extends from the inner end of the rotating shaft 31, passing through the second cover 22 and the sealing element 8 to enter the tank body 1. The bottom of the sealing element 8 can be provided with a conical opening for the protective tube 34 or the pipeline 91 to extend out. Under the pressure inside the tank body 1, the conical opening of the sealing element 8 can fit against the protective tube 34 or the pipeline 91 to achieve a sealing effect.

[0144] like Figure 2 and Figure 4 In one specific embodiment shown, the protective tube 34 is fixedly connected to the second cover 22 and they are sealed together. A sealing ring 23 can be provided between the protective tube 34 and the second cover 22 for sealing.

[0145] Specifically, refer to Figure 2 and Figure 4 From this perspective, the second cover 22 has a stepped hole 222 in the middle, which includes a large threaded hole at the top and a small threaded hole at the bottom. The lower end of the bushing 32 is threaded into the large threaded hole of the stepped hole 222, and the lower end of the protective tube 34 is threaded into the small threaded hole of the stepped hole 222.

[0146] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, a detachable and fixed pressure ring 12 is provided on the outer side of the can opening 11. The pressure ring 12 presses against the outer side of the first cover 21, confining the sealing mechanism within the can opening 11. The pressure ring 12 is an annular structure with an inner hole. The inner hole of the pressure ring 12 avoids the outer ends of the fixed cover 33 and the rotating shaft 31. That is, the driving ends 311 of the fixed cover 33 and the rotating shaft 31 protrude from the inner hole of the pressure ring 12, and a certain gap is left between them and the inner hole of the pressure ring 12 to facilitate operation by the staff.

[0147] Specifically, the pressure ring 12 can be fixed to the tank body 1 by multiple screws and nuts. The multiple screws can be fixed to the tank body 1 by welding, integral machining or other connection methods that ensure the integrity of the tank body 1.

[0148] like Figure 14 In the specific embodiment shown, four screws are fixedly connected to the tank body 1, and the four screws are evenly distributed around the tank opening 11. The pressure ring 12 is provided with through holes corresponding to the four screws. The screws pass through the corresponding through holes on the pressure ring 12, and nuts are threaded onto the screws respectively. The nuts fix the pressure ring 12 to the tank body 1.

[0149] This application also provides a sealed container, including a container body 1, which includes a container opening sealing structure. The container opening sealing structure includes a container opening 11 disposed on the container body 1, and a sealing mechanism assembled within the container opening 11. The specific structure, principle, and effect of the container body 1 and the container opening sealing structure can be referred to the container opening sealing structure provided above in this specification, and therefore will not be repeated here.

[0150] In some embodiments of this application, such as Figure 1 As shown, the tank body 1 of the sealed tank can be configured as a one-piece spun-formed tank body, with a seamless structure, uniform wall thickness, and high structural strength, which can reduce pressure loss within the tank body 1. The tank body 1 can also be configured as a vacuum tank, comprising an integrally formed inner tank and an outer tank, with a vacuum layer between the inner and outer tanks, providing good insulation. The tank opening 11 of the sealed tank is tightly sealed and can withstand high pressure, making it suitable for storing liquefied natural gas or other high-pressure fluids.

[0151] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technological improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this application is defined by the appended claims.

Claims

1. A can opening sealing structure, characterized in that, Includes a can opening and a sealing mechanism fitted within the can opening, the sealing mechanism comprising: A sealing cap assembly that seals with the can opening; A rotating shaft assembly, which is mounted on the sealing cover assembly and is rotatable relative to the sealing cover assembly about a rotation axis; A slider assembly comprising a plurality of sliders distributed around the pivot assembly, the plurality of sliders being movably connected to the pivot assembly; The sealing cap assembly is configured to guide the plurality of sliders in the radial direction; The rotating shaft assembly is configured to, when rotated, cause the plurality of sliders to extend radially to a locked position or retract to an unlocked position; The slider is locked to the inner wall of the can opening in the locked position and can be disengaged from the can opening in the unlocked position. A radial engagement structure is provided between adjacent sliders, and the adjacent sliders engage with each other in the radial direction through the radial engagement structure when in the locked position; The plurality of sliders includes a plurality of alternating first sliders and a plurality of second sliders, wherein an elastic member is disposed between the first slider and the pivot assembly, the elastic member being configured to drive the first slider to extend radially from the unlock position.

2. The can opening sealing structure according to claim 1, characterized in that, The inner wall of the can opening extends axially, and the can opening forms a constricted structure with the outer end smaller than the inner end.

3. The can opening sealing structure according to claim 1, characterized in that, When locked in position, the outer surfaces of the plurality of sliders form an arc surface that conforms to the shape of the inner wall of the can opening; And / or, A sealing element is provided between the sealing mechanism and the inner wall of the can opening, and the sealing element is pressed when the plurality of sliders extend to the locking position.

4. The can opening sealing structure according to claim 1, characterized in that, The plurality of sliders are movably connected to the rotating shaft assembly via connecting rods. The plurality of sliders and the corresponding connecting rods have a certain amount of mobility to move relative to each other in the radial direction. The rotating shaft assembly is configured to drive the connecting rods to move a certain distance in the radial direction when rotated, thereby causing the corresponding sliders to extend or retract.

5. The can opening sealing structure according to claim 4, characterized in that, Each of the multiple sliders is provided with a clearance groove, one end of the connecting rod is movably restricted in the clearance groove, and the connecting rod is able to move in the radial and circumferential directions in the clearance groove; And / or, A ball-head plunger is provided between each of the first sliders and the sealing cover assembly. When the first slider extends to the locking position, it is locked with the sealing cover assembly by the ball-head plunger. And / or, Multiple links are configured to extend in the radial direction when pushing the corresponding slider to the locked position.

6. The can opening sealing structure according to any one of claims 1 to 5, characterized in that, The sealing cap assembly includes a first cap body near the outer end of the can opening and a second cap body near the inner end of the can opening; the rotating shaft assembly is rotatably engaged with the first cap body and the second cap body, and a plurality of sliders are engaged between the first cap body and the second cap body, and the first cap body and the second cap body are provided with guide rails that respectively engage with the plurality of sliders.

7. The can opening sealing structure according to claim 6, characterized in that, The rotating shaft assembly includes: A rotating shaft is movably connected to a plurality of the sliders via connecting rods, and the outer end of the rotating shaft extends outward through the first cover. A bushing is rotatably fitted onto the outside of the rotating shaft. The inner end of the bushing is fixedly connected to the second cover. The bushing is provided with an extension hole for avoiding the connecting rod, and the extension hole extends along the circumferential direction. A fixed cover is fixedly connected to the outer end of the bushing and pressed against the outside of the first cover body.

8. The can opening sealing structure according to claim 7, characterized in that, The rotating shaft is provided with a protective tube for installing sensor pipelines, and the protective tube is sealed to the second cover. And / or, A detachable and fixed pressure ring is provided on the outside of the can opening. The pressure ring presses against the outside of the first cover body, and the inner hole of the pressure ring avoids the outer end of the fixed cover and the rotating shaft.

9. A sealed container, characterized in that, Includes a tank body, said tank body comprising the tank opening sealing structure according to any one of claims 1 to 8.

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