An accident-resistant screwless quick connection device for a sealed container and its use method

Abstract

The present invention discloses an accident-resistant screwless quick connection device for a sealed container and a method for using the same. The device adopts a technical approach in which multiple lock tongues are synchronously extended radially, and the lock tongues and the second inclined surface of the mounting groove of the second sealed container are transmitted and fastened and pressed to replace the traditional screw connection method, so as to realize axial pressing and sealing limitation and axial and circumferential anti-rotation between the second sealing cover and the second sealed container; the first-level torque amplification is realized by meshing transmission of a transmission wheel and a helical wheel; the lock tongue passes through a dovetail groove to form a sliding pair, and the helical wheel drives the lock tongue to complete the rotational-translational conversion, and the lock tongue is synchronously extended with force to realize the second-level force amplification; the multiple lock tongues and the second inclined surface of the mounting groove are synchronously contacted and transmitted to realize the third-level force amplification; the resultant force of the axial component of the supporting force of the multiple lock tongues and the second inclined surface of the mounting groove is doubled compared with the operating torque applied to the transmission wheel, so as to ensure that the second sealing cover is reliably pressed into place.

Description

Technical Field

[0001] The present invention relates to the technical field of sealed containers for hazardous chemicals, and in particular to an accident-resistant screwless quick connection device for a sealed container and a use method thereof. Background Art

[0002] Sealed containers for hazardous chemicals are used to store and transport toxic and hazardous chemicals, radioactive materials, flammable and explosive materials, and other items. They are required to maintain reliable connections and seals even in static storage and during typical impact accidents during transportation, preventing hazardous chemical leaks from causing environmental pollution and threatening public safety. To ensure a reliable connection and effective seal between the sealing lid and the container in the event of an impact, measures such as increasing the structural dimensions of the connection, increasing the specifications and number of connectors, and applying sufficient preload force are often adopted. This leads to cumbersome assembly and disassembly operations, low assembly and disassembly efficiency, a large number of operators, and insufficient assembly and disassembly convenience. This is especially true for items that are time-sensitive or urgently needed, as the time required to load and unload items from the sealed container must be shortened as much as possible. This is when the problem of low operational efficiency becomes particularly prominent.

[0003] Traditional technical solution: In the traditional technical solution, the first sealing cover 2 and the first sealed container 1 are usually sealed by an end face sealing ring 4, and a plurality of connecting screws 3 evenly distributed along the circumference are used to achieve a reliable connection between the first sealing cover 2 and the first sealed container 1. The reliability and sealing of the connection between the first sealing cover 2 and the first sealed container 1 in the event of a collision are ensured by increasing the local structural dimensions to increase the strength and rigidity, increasing the specifications and number of the connecting screws 3, and applying sufficient pre-tightening torque to the connecting screws 3 in a graded and symmetrical manner. The connection diagram of the traditional solution is shown in the figure below. Figure 1-3 Lock shown.

[0004] In the traditional technical solution, the sealing cover and the sealed container are sealed at the contact surface with an end face seal, and the sealing cover and the sealed container are connected with multiple screws evenly distributed along the circumference, and the tightening torque is applied symmetrically in stages. There are the following disadvantages:

[0005] The operation process is cumbersome and inefficient: To ensure connection reliability and prevent leakage of hazardous chemicals in sealed containers in the event of an impact, sufficient connection strength and rigidity are required. Therefore, a large number of connecting screws are used, with large specifications, and they need to be symmetrically applied in stages to a given pre-tightening force. Due to the large number of screws, the pre-tightening force required is large, and the torque usually needs to be tightened symmetrically in two or even three stages. This results in many operation steps, low efficiency, and long installation and removal time for the sealing cover.

[0006] A large number of operators and poor operational convenience: To shorten the installation and removal time of the sealing cover, multiple people are usually deployed to perform screw installation and symmetrical tightening operations, which increases the demand for personnel support. In addition, multiple-person operation introduces problems of operator coordination and interference in operating space.

[0007] The problem of screw torque reduction / loosening is prominent: When using screw connections, sealed containers are subject to the possibility of screw torque reduction and loosening in dynamic environments such as long-distance transportation, resulting in the risk of reduced connection strength and sealing performance.

[0008] Therefore, there is an urgent need to develop an accident-resistant screwless quick connection device for a sealed container and a method of using the same to solve the above problems. Summary of the Invention

[0009] The purpose of the present invention is to design an accident-resistant screwless quick connection device for a sealed container and a method for using the same in order to solve the above problems.

[0010] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0011] An anti-accident screwless quick connection device for a sealed container, used for connecting a second sealing cover and a second sealed container, the anti-accident screwless quick connection device comprising an end face sealing ring and a radial sealing ring;

[0012] The second sealed container is formed into a barrel-shaped structure, and a plurality of mounting grooves are provided on the side wall of the open end of the second sealed container; an annular second step stop is provided on the side wall of the open end, and the distance from the second step stop to the open end of the second sealed container is greater than the distance from the mounting groove to the open end; a first mounting ring groove is provided in the end face of the second step stop, and an end face sealing ring is disposed between the first mounting ring groove and the first step stop;

[0013] The second sealing cover is formed into a columnar structure, and the second sealing cover includes a base, a spiral wheel, a transmission wheel, an operating knob, a ratchet locking mechanism, a plurality of lock tongues, a mounting ring, and a plurality of dovetail grooves; an annular first step stop is provided on the lower end side wall of the base, the first step stop is matched with the second step stop for installation, and the end face sealing ring is matched with the end face of the first step stop; a second mounting ring groove is provided on the end side wall of the base, the end side wall of the base is matched with the inner wall of the second sealed container, and the radial sealing ring is placed between the second mounting ring groove and the inner wall of the second sealed container ; The helical wheel is rotatably installed on the upper center of the base, the transmission wheel is rotatably installed on the upper end of the base, the ratchet locking mechanism is installed on the upper end of the base, the edge of the helical wheel is engaged with the transmission wheel, and the ratchet locking mechanism cooperates with the transmission wheel; the mounting ring is installed at the upper edge of the base, and a plurality of dovetail grooves are provided on the mounting ring. A card slot is provided on the first end of the lock tongue, and the card slot is engaged with the spiral of the helical wheel. The second end of the lock tongue passes through the dovetail slot and is clamped into the mounting slot. The multiple lock tongues are radially distributed around the center of the upper end of the base; the operating knob is connected to the upper end of the transmission wheel.

[0014] Furthermore, a first inclined surface lowered toward the end is formed on the upper side of the second end of the lock tongue, and correspondingly, a second inclined surface rising from the outside to the inside is formed on the upper side of the mounting groove, and the first inclined surface and the second inclined surface are matched and connected.

[0015] Preferably, the multiple locking tongues and the multiple dovetail grooves are evenly distributed around the axis of the base, and correspondingly, the multiple mounting grooves are evenly distributed around the axis of the second sealed container.

[0016] Preferably, the helical wheel is rotatably connected to the base via a first bearing; and the transmission wheel is rotatably connected to the base via a second bearing.

[0017] Specifically, the ratchet locking mechanism includes a mounting box, two locking rods, multiple mounting screws, two cylindrical compression springs, and a limit block. The mounting box is mounted on the upper end of the base by multiple mounting screws. A cavity is provided in the mounting box. The limit block is formed as a cam structure. The limit block is rotatably mounted on the base and placed at the center of the cavity. The upper end of the limit block is fixedly connected to one end of the locking lever through a connecting rod, and the locking lever is perpendicular to the limit block; the first ends of the two cylindrical compression springs are respectively mounted on both sides of the cavity, and the two locking rods are rotatably connected to the mounting box. The inner sides of the two locking rods are respectively placed on both sides of the limit block and are in contact with each other; the second ends of the two cylindrical compression springs are respectively connected to the outer sides of the two locking rods, and one locking rod is used to lock the transmission wheel in a certain rotation direction.

[0018] Furthermore, the second sealing cover also includes a cover plate, which is arranged above the base. The cover plate is provided with two through holes, and the operating knob and the connecting rod are respectively arranged through the two through holes. The locking lever is placed above the cover plate.

[0019] A method for using an accident-resistant screwless quick connection device for a sealed container, comprising the following steps:

[0020] S1. Rotate the operating knob to rotate the transmission wheel, which engages with the helical wheel to achieve the first level of force amplification.

[0021] S2. A spiral groove with equal pitch is set on the spiral wheel. As the spiral wheel rotates, the wall of the spiral groove drives the lock tongue to be pushed out along the dovetail groove, achieving the second level of force amplification;

[0022] S3. After the lock tongue contacts the second sealed container, an inclined transmission is performed to achieve the third level of force amplification, and the connecting device is self-locking.

[0023] Specifically, the number of teeth on the transmission wheel and the helical wheel are Z and 传动 and Z 螺线 , the torque M applied by the operator to the transmission wheel 传动轮 The torque M acting on the helical wheel by the transmission wheel 螺线轮 The relationship is as shown in formula (1). The gear ratio of the transmission wheel and the helical wheel is designed to achieve the first-level force increase;

[0024] …… ...

[0025] The pitch of the helical groove is P, and the bearing force of the contact surface between the lock tongue and the helical wheel is F. N , friction force f N =μF N , where μ is the dynamic friction factor between the lock tongue and the helical wheel; the radius of gyration of the contact point between the lock tongue and the helical groove ρ, F N The action line to the center force arm L of the helical wheel F Approximately as formula (2); the helical wheel torque M 螺线轮 By friction force f N And support force F N The generated torque is balanced. Assuming the number of lock tongues Q and approximating that the radius of rotation of all lock tongues and the contact point of the spiral wheel is equal, we can get:

[0026] ……… ...

[0027] ……… ...

[0028] The bolt is supported by the dovetail groove during the pushing process N 1燕尾槽 、N 2燕尾槽 and friction force f 燕尾槽 Effect, N 2燕尾槽 The point of action is the center of rotation, N 1燕尾槽 Lever L1, f N The lever arm L2, the equivalent width B of the contact surface between the lock tongue and the dovetail groove, according to the equilibrium condition:

[0029] …… ...

[0030] ………(5)

[0031] ……… ...

[0032] The angle θ of the inclined plane and the contact support force F between the lock tongue and the inclined plane are 斜面 , friction force f 斜面 , f 斜面 =μF 斜面 , according to the equilibrium condition:

[0033] ……… ...

[0034] The resistance from the radial sealing ring during the assembly of the second sealing cover is f 径向密封 , the resistance from the end face seal is F 端面密封 , assume that the total axial thrust generated by the force-amplifying linkage mechanism on the sealing cover is F 总推力 , according to the equilibrium condition:

[0035] …… ...

[0036] According to formulas (1)-(8), we can get:

[0037] ………(9)

[0038] According to formula (9), the total axial thrust F obtained by the second sealing cover is 总推力 The force multiplier compared to the operating force (torque) applied by the operator to the helical wheel and the ratio of the number of teeth of the helical wheel to the transmission wheel Z 螺线 / Z 传动 When θ<atctanμ, the force multiplier decreases as θ increases, and it is self-locking when θ>atctanμ.

[0039] Furthermore, a method for using an accident-resistant screwless quick connection device for a sealed container also includes step S4, after the second sealing cover is assembled in place, using a ratchet locking mechanism to limit the one-way rotation of the transmission wheel to prevent the lock tongue from retreating; specifically: the locking lever is pointed toward the closing side, and the limit block limits the orientation of the two locking rods, so that the locking rod on one side interferes with the transmission wheel, and the locking rod on the other side is disengaged from the transmission wheel, thereby limiting the rotation of the transmission wheel in the opening direction and the rotation in the closing direction is unrestricted. At this time, the lock tongue can only extend outward and cannot retreat, preventing the lock tongue from loosening and retreating in a dynamic environment, causing the second sealing cover to be accidentally unlocked.

[0040] The beneficial effects of the present invention are:

[0041] In the present application, a plurality of locking tongues are synchronously extended radially, and the locking tongues and the second inclined surface of the mounting groove of the second sealed container are driven and fastened to replace the traditional screw connection method, thereby achieving axial compression, sealing, and axial and circumferential anti-rotation between the second sealing cover and the second sealed container;

[0042] The first stage of torque amplification is achieved by meshing the transmission wheel and the helical wheel. The lock tongue passes through the dovetail groove to form a sliding pair. The helical wheel drives the lock tongue to complete the rotation-translation conversion, and the lock tongue is synchronously extended with increased force, achieving the second stage of force amplification. The multiple lock tongues and the second inclined surface of the installation groove are synchronously contacted and driven to achieve the third stage of force amplification. The resultant force of the axial component of the supporting force of the multiple lock tongues and the second inclined surface of the installation groove is doubled compared to the operating force (torque) applied to the transmission wheel, ensuring that the second sealing cover is reliably pressed into place.

[0043] By applying a specified torque to the operating knob, all lock tongues can be extended and retracted simultaneously, allowing the second sealing cover to be assembled and unlocked quickly. To prevent the lock tongue from accidentally retracting or extending in a dynamic environment, a one-way locking technique based on a ratchet mechanism is used to lock the transmission wheel in one direction, thereby locking the lock tongue position and preventing it from changing position in a dynamic environment.

[0044] Add a radial sealing ring to achieve radial sealing, and cooperate with the end face sealing ring to realize a double sealing design; the end face sealing focuses on external high-pressure protection to improve the waterproof performance in deep water environment; the radial sealing focuses on improving the sealing performance under impact accidents, and maintains the corresponding sealing performance when the deformation does not exceed a certain threshold; the double sealing design enhances the sealing performance under typical abnormal accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 The figure is a schematic diagram (cross-sectional view) of the structure of the connection device between the sealing cover and the sealed container of hazardous chemicals in the prior art.

[0046] Figure 2 This is a schematic diagram (stereoscopic diagram) of the structure of the connection device between the sealing cover and the sealed container of hazardous chemicals in the prior art.

[0047] Figure 3 for Figure 1 Enlarged view of the middle part of the structure.

[0048] Figure 4 It is a cross-sectional view of the present invention.

[0049] Figure 5 for Figure 4 Enlarged view of the middle part of the structure.

[0050] Figure 6 Schematic diagram of the lock tongue in the second sealing cover of the present invention in the open state, wherein a is the state before opening, b is the state during opening, and c is the state after opening.

[0051] Figure 7 Schematic diagram of the rotation direction of the operating knob and the position of the locking lever in the open and closed states of the present invention.

[0052] Figure 8 The structure of the second sealing cover in the present invention is shown as follows Figure 1 .

[0053] Figure 9 The structure of the second sealing cover in the present invention is shown as follows Figure 2 .

[0054] Figure 10 The structure of the second sealing cover in the present invention is shown as follows Figure 3 .

[0055] Figure 11 The force condition of the lock tongue in the present invention is shown as follows Figure 1 .

[0056] Figure 12 The force condition of the lock tongue in the present invention is shown as follows Figure 2 .

[0057] Figure 13 Schematic diagram of the one-way locking principle (preventing back-off) of the ratchet locking mechanism of the present invention (back side).

[0058] Figure 14 Schematic diagram of the one-way locking principle (preventing back-off) of the ratchet locking mechanism in the present invention (front view).

[0059] Figure 15 Schematic diagram of the one-way locking principle (preventing accidental extension) of the ratchet locking mechanism in the present invention (back).

[0060] Figure 16 Schematic diagram of the one-way locking principle (preventing accidental extension) of the ratchet locking mechanism in the present invention (front view).

[0061] Figure 17 Schematic diagram of automatic reset of the locking lever by a small rotation angle (locked state) in the present invention.

[0062] Figure 18 Schematic diagram of the automatic reset of the locking lever by a small rotation angle in the present invention (it can return to the limit rotation angle).

[0063] In the figure: 1. First sealed container; 2. First sealing cover; 3. Connecting screw; 4. End face sealing ring; 5. Second sealing cover; 51. Second mounting ring groove; 52. First bearing; 53. Screw wheel; 531. Screw; 54. Transmission wheel; 55. Second bearing; 56. Lock tongue; 561. Slot; 562. First inclined surface; 57. Base; 571. Mounting ring; 572. Dovetail groove; 58. Cover plate; 59. Valve protection cover; 510. Gas valve; 511. Ratchet locking mechanism; 512. Locking rod; 513. Mounting screw; 514. Cylindrical compression spring; 515. Limit block; 516. First step stop; 6. Radial sealing ring; 7. Locking lever; 8. Operating knob; 9. Second sealed container; 91. Mounting groove; 92. Second inclined surface; 93. Second step stop; 94. First mounting ring groove. DETAILED DESCRIPTION

[0064] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0065] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0066] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0067] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0068] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0069] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also mean internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0070] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0071] like Figure 4-10 As shown, an anti-accident screwless quick connection device for a sealed container is used to connect a second sealing cover 5 and a second sealed container 9. The anti-accident screwless quick connection device includes an end face sealing ring 4 and a radial sealing ring 6;

[0072] The second sealed container 9 is formed into a barrel-shaped structure. A plurality of mounting grooves 91 are provided on the side wall of the open end of the second sealed container 9. An annular second step stop 93 is provided on the side wall of the open end. The distance from the second step stop 93 to the open end of the second sealed container 9 is greater than the distance from the mounting groove 91 to the open end. A first mounting ring groove 94 is provided in the end surface of the second step stop 93. The end face sealing ring 4 is placed between the first mounting ring groove 94 and the first step stop 516.

[0073] The second sealing cover 5 is formed into a columnar structure, and the second sealing cover 5 includes a base 57, a spiral wheel 53, a transmission wheel 54, an operating knob 8, a ratchet locking mechanism 511, a multi-piece lock tongue 56, a mounting ring 571, and a plurality of dovetail grooves 572; an annular first step stop 516 is provided on the lower end side wall of the base 57, the first step stop 516 is installed in conjunction with the second step stop 93, and the end face sealing ring 4 is connected to the end face of the first step stop 516; a second mounting ring groove 51 is provided on the end side wall of the base 57, the end side wall of the base 57 is matched with the inner wall of the second sealed container 9, and the radial sealing ring 6 is placed between the second mounting ring groove 51 and the inner wall of the second sealed container 9; the spiral wheel 53 is rotatable The cam 512 is actuated by a spring 522 which is adapted to engage with the drive wheel 54 and to engage with the drive wheel 54. The cam 512 is actuated by a spring 522 which is adapted to engage with the drive wheel 54. The cam 512 is actuated by a spring 522 which is adapted to engage with the drive wheel 54. The cam 512 is actuated by a spring 522 which is adapted to engage with the drive wheel 54. The cam 512 is actuated by a spring 522 which is adapted to engage with the drive wheel 54. The cam 512 is actuated by a spring 522 which is adapted to engage with the drive wheel 54.

[0074] A first slope 562 is formed on the upper side of the second end of the locking tongue 56 and is lowered toward the end. Correspondingly, a second slope 92 is formed on the upper side of the mounting groove 91 and is raised from the outside to the inside. The first slope 562 and the second slope 92 are connected in a beveled manner.

[0075] The multiple locking tongues 56 and the multiple dovetail grooves 572 are evenly distributed around the axis of the base 57 . Correspondingly, the multiple mounting grooves 91 are evenly distributed around the axis of the second sealed container 9 .

[0076] The spiral wheel 53 is rotatably connected to the base 57 via a first bearing 52 ; the transmission wheel 54 is rotatably connected to the base 57 via a second bearing 55 .

[0077] In some embodiments, the outer diameter of the base 57 is slightly smaller than the inner diameter of the opening of the second sealed container 9 .

[0078] like Figure 13-16 As shown, in some embodiments, the ratchet locking mechanism 511 includes a mounting box, two locking rods 512, multiple mounting screws 513, two cylindrical compression springs 514, and a limit block 515. The mounting box is mounted on the upper end of the base 57 by multiple mounting screws 513. A cavity is provided in the mounting box. The limit block 515 is formed into a cam structure. The limit block 515 is rotatably mounted on the base 57 and placed at the center of the cavity. The upper end of the limit block 515 is fixedly connected to one end of the locking lever 7 through a connecting rod, and the locking lever 7 is perpendicular to the limit block 515; the first ends of the two cylindrical compression springs 514 are respectively mounted on both sides of the cavity, and the two locking rods 512 are rotatably connected to the mounting box. The inner sides of the two locking rods 512 are respectively placed on both sides of the limit block 515 and are in contact with each other; the second ends of the two cylindrical compression springs 514 are respectively connected to the outer sides of the two locking rods 512, and one locking rod 512 is used to lock the transmission wheel 54 in a certain rotation direction.

[0079] like Figure 7 and 8 As shown, in some embodiments, the second sealing cover 5 also includes a cover plate 58, which is arranged above the base 57. Two through holes are provided on the cover plate 58, and the operating knob 8 and the connecting rod are respectively provided through the two through holes. The locking lever 7 is placed above the cover plate 58.

[0080] The installation positions of the valve protection cover 59 and the gas valve 510 are also shown in this application.

[0081] A method for using an accident-resistant screwless quick connection device for a sealed container, as shown in the schematic diagram Figure 8-12 , specifically including:

[0082] 1. Rotate the operating knob 8 to rotate the transmission wheel 54, and the transmission wheel 54 engages with the spiral wheel 53 for transmission. The number of teeth of the transmission wheel 54 and the spiral wheel 53 are Z 传动、 Z 螺线 , the torque M applied by the operator to the transmission wheel 54 传动轮 The torque M acting on the helical wheel 53 by the transmission wheel 54 螺线轮 The relationship is as shown in formula (1). The gear ratio of the transmission wheel 54 and the spiral wheel 53 is reasonably designed to achieve the first level of force amplification;

[0083] …… ...

[0084] 2. The spiral wheel 53 is designed with a spiral groove 531 of equal pitch, with a pitch of P. As the spiral wheel 53 rotates, the groove wall of the spiral 531 drives the lock tongue 56 to be pushed out along the dovetail groove 572 of the cover plate 58, achieving the second level of force amplification. The contact surface support force F between the lock tongue 56 and the spiral wheel 53 N , friction force f N=μF N , where μ is the dynamic friction factor between the lock tongue 56 and the spiral wheel 53. The radius of gyration ρ of the contact point between the lock tongue 56 and the spiral 531 groove is F N The action line is to the central force arm L of the spiral wheel 53 F It can be approximated as formula (2). The torque M of the spiral wheel 53 螺线轮 By friction force f N And support force F N The generated torque is balanced. Assuming the number of locking tongues 56 is Q and the rotation radius of the contact points of all locking tongues 56 and the spiral wheel 53 is approximately equal, we can get:

[0085] ……… ...

[0086] ……… ...

[0087] 3. The locking tongue 56 is supported by the dovetail groove 572 of the cover plate 58 during the pushing process. 1燕尾槽 、N 2燕尾槽 and friction force f 燕尾槽 Effect, N 2燕尾槽 The point of action is the center of rotation, N 1燕尾槽 Lever L1, f N The lever arm L2, the equivalent width B of the contact surface between the lock tongue 56 and the dovetail groove 572, according to the equilibrium condition:

[0088] …… ...

[0089] ………(5)

[0090] ……… ...

[0091] 4. After the locking tongue 56 contacts the second sealed container 9, the inclined surface transmission is performed to achieve the third level of force amplification. The inclined surface angle θ, the contact support force F between the locking tongue 56 and the inclined surface 斜面 , friction force f 斜面 , f 斜面 =μF 斜面 , according to the equilibrium condition:

[0092] ……… ...

[0093] 5. During the assembly of the second sealing cover 5, the resistance from the radial sealing ring 6 is f 径向密封 , the resistance from the end face seal ring 4 is F 端面密封 , assume that the total axial thrust generated by the force-amplifying linkage mechanism on the sealing cover is F 总推力 , according to the equilibrium condition:

[0094] …… ...

[0095] According to formulas (1) to (8), we can obtain:

[0096] ………(9)

[0097] According to formula (9), the total axial thrust F obtained by the second sealing cover 5 is 总推力 The force multiplier of the operating force (torque) applied by the operator to the helical wheel 53 and the tooth ratio Z of the helical wheel 53 / transmission wheel 54 螺线 / Z 传动 When θ<atctanμ, the force multiplier decreases as θ increases, and it is self-locking when θ>atctanμ.

[0098] According to formula (9), if the gear ratio of the helical wheel 53 and the transmission wheel 54 is Z 螺线 / Z 传动 =105 / 17, μ=0.1, spiral groove radius of gyration ρ=0.17m, pitch P=0.02m, θ=12°, L1=0.09m, L2=0.1m, B=0.045m, we can get F 总推力 ≈955M 传动 When the operator applies a rotational torque of 100 N·m to the operating knob 8 , the second sealing cover 5 is expected to obtain an axial thrust of approximately 95,500 N.

[0099] In order to prevent the lock tongue 56 from retreating in a dynamic environment such as transportation vibration after the second sealing cover 5 is assembled in place, a ratchet locking mechanism is used to limit the unidirectional rotation of the transmission wheel 54 to prevent the lock tongue 56 from retreating, thereby preventing the lock tongue 56 from retreating. The principle is as follows: Figure 13 and 14 As shown;

[0100] The mounting box is mounted on the base 57 via mounting screws 513. The two locking rods 512 form a rotating pair with the mounting box and can rotate around the rotation point. The locking lever 7 is fixedly connected to the limit block 515 and is located on the outside of the cover plate 58 for easy operation. The locking lever 7 is moved to drive the limit block 515 to rotate. Under the action of the cylindrical compression spring 514, the locking rod 512 always remains in contact with the limit block 515. The locking rod 512 is constrained by the shape of the limit block 515. As the limit block 515 rotates, the opening and closing angle of the locking rod 512 changes, and it rotates around the rotation point.

[0101] The locking lever 7 points to the "closed cover" side, and the limit block 515 limits the Figure 13 and 14The left and right locking rods 512 are oriented so that the left locking rod 512 interferes with the transmission wheel 54, while the right locking rod 512 is out of contact with the transmission wheel 54, thereby restricting the transmission wheel 54 from rotating in the "opening" direction, while rotating in the "closing" direction is unrestricted, that is, the operating knob 8 can only rotate counterclockwise. At this time, the locking tongue 56 can only extend outward and cannot retract, preventing the locking tongue 56 from loosening and retracting in a dynamic environment, causing the second sealing cover 5 to be accidentally unlocked;

[0102] Similarly, the locking lever 7 points to the "open cover" side, and the limit block 515 limits the Figure 15 and 16 The left and right locking rods 512 are oriented so that the right locking rod 512 interferes with the transmission wheel 54, and the left locking rod 512 is out of contact with the transmission wheel 54, thereby limiting the transmission wheel 54 from rotating in the "closing" direction, and rotating in the "opening" direction is not restricted, that is, the operating knob 8 can only rotate clockwise, at this time the lock tongue 56 can only retreat, and the second sealing cover 5 performs the opening and unlocking operation.

[0103] In the dynamic environment of transportation vibration, when the locking lever 7 rotates by a small angle, the locking lever 7 will automatically return to the initial locking position due to the return action of the cylindrical compression spring 514, preventing the locking state from changing. Figure 17 and 18 As shown, when the locking lever 7 is locked to the left and rotates clockwise by an angle not exceeding β, the left locking lever 512, under the action of the return spring, generates a torque that causes the limit block 515 to return counterclockwise. The force exerted by the right locking lever 512 exceeds the rotation axis of the limit block 515 without exerting any torque, allowing the limit block 515 to reliably return to its original position. The same principle applies when the locking lever 7 is locked to the right. Therefore, the locking lever 7 can reliably return to its original position when locked, provided the rotation angle does not exceed the critical angle β.

[0104] Compared with traditional technology, the advantages of this patented technology are:

[0105] 1. The force-amplifying linkage mechanism + inclined synchronous transmission technology replaces the traditional multiple screw connection method, realizing screw-free operation during the installation and removal of the sealing cover, greatly shortening the operation steps and process, simplifying the operation method, and improving the convenience and efficiency of operation;

[0106] 2. A three-stage force-increasing method is adopted, which includes meshing transmission of the transmission wheel 54 and the helical wheel 53, synchronous force-increasing extension and retraction of the lock tongue 56 driven by the helical wheel 53, and transmission between the lock tongue 56 and the inclined surface of the sealed container. The sealing cover can be reliably assembled and unlocked by simply turning the operating knob 8 to a given torque. This avoids the traditional method of applying torque symmetrically to multiple screws in stages, simplifies the operating process and method, improves operational convenience and efficiency, and reduces the number of operating personnel.

[0107] 3. The one-way locking technology of the ratchet mechanism prevents the sealing cover and the sealed container from being loosened in a dynamic environment, thus avoiding the problem of screw loosening in the traditional screw connection method;

[0108] 4. The dual sealing measures of radial seal and end face seal are adopted to enhance the sealing performance under typical abnormal accidents.

[0109] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An anti-accident screwless quick connection device for a sealed container, used for connecting a second sealing cover and a second sealed container, characterized in that: The accident-resistant screwless quick connection device includes an end face sealing ring and a radial sealing ring; The second sealed container is formed into a barrel-shaped structure, and a plurality of mounting grooves are provided on the side wall of the open end of the second sealed container; an annular second step stop is provided on the side wall of the open end, and the distance from the second step stop to the open end of the second sealed container is greater than the distance from the mounting groove to the open end; a first mounting ring groove is provided in the end face of the second step stop, and an end face sealing ring is disposed between the first mounting ring groove and the first step stop; The second sealing cover is formed into a columnar structure, and the second sealing cover includes a base, a spiral wheel, a transmission wheel, an operating knob, a ratchet locking mechanism, a plurality of lock tongues, a mounting ring, and a plurality of dovetail grooves; an annular first step stop is provided on the lower end side wall of the base, the first step stop is matched with the second step stop for installation, and the end face sealing ring is matched with the end face of the first step stop; a second mounting ring groove is provided on the end side wall of the base, the end side wall of the base is matched with the inner wall of the second sealed container, and the radial sealing ring is placed between the second mounting ring groove and the inner wall of the second sealed container The helical wheel is rotatably mounted on the center of the upper end of the base, the transmission wheel is rotatably mounted on the upper end of the base, the ratchet locking mechanism is mounted on the upper end of the base, the edge of the helical wheel is meshed with the transmission wheel, and the ratchet locking mechanism cooperates with the transmission wheel; the mounting ring is mounted at the edge of the upper end of the base, a plurality of dovetail grooves are provided on the mounting ring, a card slot is provided on the first end of the lock tongue, the card slot is engaged with the spiral of the helical wheel, the second end of the lock tongue passes through the dovetail slot and is engaged in the mounting slot, and the plurality of lock tongues are radially distributed around the center of the upper end of the base; the operating knob is connected to the upper end of the transmission wheel; A first inclined surface lowered toward the end is formed on the upper side of the second end of the lock tongue. Correspondingly, a second inclined surface rising from the outside to the inside is formed on the upper side of the mounting groove. The first inclined surface and the second inclined surface are matched and connected.

2. The anti-accident screwless quick connection device for a sealed container according to claim 1, characterized in that: The multiple locking tongues and the multiple dovetail grooves are evenly distributed around the axis of the base. Correspondingly, the multiple mounting grooves are evenly distributed around the axis of the second sealed container.

3. The anti-accident screwless quick connection device for a sealed container according to claim 1, characterized in that: The spiral wheel is rotatably connected to the base through a first bearing; the transmission wheel is rotatably connected to the base through a second bearing.

4. The anti-accident screwless quick connection device for a sealed container according to claim 1, characterized in that: The ratchet locking mechanism includes a mounting frame, two locking rods, multiple mounting screws, two cylindrical compression springs, and a limit block. The mounting frame is mounted on the upper end of the base by multiple mounting screws. A cavity is provided in the mounting frame. The limit block is formed as a cam structure. The limit block is rotatably mounted on the base and placed at the center of the cavity. The upper end of the limit block is fixedly connected to one end of the locking lever through a connecting rod, and the locking lever is perpendicular to the limit block; the first ends of the two cylindrical compression springs are respectively mounted on both sides of the cavity, and the two locking rods are rotatably connected to the mounting frame. The inner sides of the two locking rods are respectively placed on both sides of the limit block and are in contact with each other; the second ends of the two cylindrical compression springs are respectively connected to the outer sides of the two locking rods, and one locking rod is used to lock the transmission wheel in a certain rotation direction.

5. The anti-accident screwless quick connection device for a sealed container according to claim 4, characterized in that: The second sealing cover also includes a cover plate, which is arranged above the base. The cover plate is provided with two through holes, through which the operating knob and the connecting rod are respectively arranged, and the locking lever is placed above the cover plate.

6. The method for using the accident-resistant screwless quick connection device for a sealed container according to claim 4 or 5, characterized in that: The following steps are involved: S1. Rotate the operating knob to rotate the transmission wheel, which engages with the helical wheel to achieve the first level of force amplification. S2. A spiral groove with equal pitch is set on the spiral wheel. As the spiral wheel rotates, the wall of the spiral groove drives the lock tongue to be pushed out along the dovetail groove, achieving the second level of force amplification; S3. After the lock tongue contacts the second sealed container, an inclined transmission is performed to achieve the third level of force amplification, and the connecting device is self-locking.

7. The method for using the accident-resistant screwless quick connection device for a sealed container according to claim 6, characterized in that: The step S4 is also included, in which, after the second sealing cover is assembled in place, a ratchet locking mechanism is used to limit the unidirectional rotation of the transmission wheel to prevent the lock tongue from retreating; specifically, the locking lever is directed to the closing side, and the limit block limits the orientation of the two locking rods, so that the locking rod on one side interferes with the transmission wheel, and the locking rod on the other side is disengaged from the transmission wheel, thereby limiting the rotation of the transmission wheel in the direction of opening the cover, and the rotation in the direction of closing the cover is unrestricted. At this time, the lock tongue can only extend outward and cannot retreat, thereby preventing the lock tongue from loosening and retreating in a dynamic environment and causing the second sealing cover to be accidentally unlocked.

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