Dual-lid sealing device and opening and closing method thereof

Abstract

The application discloses a double-cover sealing device, wherein an upper cover and a lower cover are arranged in an upper cover flange and a lower cover flange respectively, a process equipment component is connected to the lower cover, the upper cover comprises a lock cover capable of moving up and down, a locking mechanism is arranged in the upper cover and the lower cover, the locking mechanism of the upper cover can lock the upper cover and the lower cover and release the upper cover and the upper cover flange when the lock cover moves upward, and can release the upper cover and the lower cover and lock the upper cover and the upper cover flange when the lock cover resets downward; the locking mechanism of the lower cover can release the lower cover and the lower cover flange when the upper cover contacts the lower cover, and can reset to lock the lower cover and the lower cover flange when the upper cover leaves the lower cover. The double-cover sealing device can be directly connected to a component to be repaired, and no additional equipment is needed. The application further provides an opening and closing method of the double-cover sealing device.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of sealing, and particularly relates to a double-cover sealing device and an opening and closing method thereof. BACKGROUND

[0002] In the field of nuclear chemical engineering, some process equipment operates in a working environment with high radioactivity and strong corrosion. The equipment is installed on the shielding floor between the radioactive maintenance area and the radioactive equipment room. The driving device is located in the radioactive maintenance area, and the key components are located in the radioactive equipment room. Therefore, when some key components need to be disassembled and maintained, special maintenance equipment needs to be used for maintenance.

[0003] In order to prevent the overflow of radioactive atmosphere to the maintenance hall, pollution of the environment, and injury to the operator when the special maintenance equipment is used for maintenance and replacement, a special double-cover sealing device is usually used to ensure the sealing requirement during the maintenance and replacement of the key components by the special maintenance equipment. The double-cover sealing device needs to disconnect the driving device and the key components to be maintained in a sealed state, and needs to ensure that the sealing surface of the double-cover sealing device is not contaminated during the opening and closing of the double-cover door and during the replacement of the key components.

[0004] In the existing double-cover sealing device technology, a gravity type double-cover sealing device disclosed in Chinese Patent No. 201410592640.6 mainly functions to close and open two sealed spaces, thereby enabling the material to be transferred between the two spaces. However, this conventional double-cover sealing device, although simple and ingenious in structure, can realize the sealing function, but the lower cover assembly only has the function of a single sealing cover, and cannot realize the function of connection with other items, and therefore cannot be directly used for maintenance of process equipment. When this double-cover sealing device is used, other equipment may be needed to grasp and move the key components, and after the maintenance is completed, additional devices need to be provided to ensure the sealing performance of the connection part. In addition, the upper cover and the flange have no locking function, and need to be externally provided with a locking mechanism, and the externally provided locking mechanism needs to be additionally controlled for locking, and is also easy to be accidentally touched, resulting in the consequences of loss of locking effect. SUMMARY

[0005] The present application aims to solve the above-mentioned problems in the prior art, and provides a double-cover sealing device which can directly connect with the components to be maintained without the need for additional equipment. The present application also provides an opening and closing method of the double-cover sealing device.

[0006] The application provides a double cover sealing device, which comprises an upper cover assembly and a lower cover assembly, the upper cover assembly comprises an upper cover flange and an upper cover, the lower cover assembly comprises a lower cover flange and a lower cover, the upper cover flange and the lower cover flange are connected to the walls of two sealing cavities to be docked respectively, the upper cover and the lower cover are arranged in the upper cover flange and the lower cover flange respectively, a process equipment component is connected to the lower cover, the upper cover comprises a lock cover capable of moving up and down, the lock mechanism is arranged in the upper cover and the lower cover, the lock mechanism of the upper cover can lock the upper cover and the lower cover and release the upper cover and the upper cover flange when the lock cover moves upward, and can release the upper cover and the lower cover and lock the upper cover and the upper cover flange when the lock cover resets downward; the lock mechanism of the lower cover can release the lower cover and the lower cover flange when the upper cover contacts the lower cover, and can reset to lock the lower cover and the lower cover flange when the upper cover leaves the lower cover.

[0007] Preferably, the upper cover further comprises an upper cover body, the lock cover is movably connected to the upper part of the upper cover body in the vertical direction, the lock mechanism of the upper cover is a first lock mechanism, the first lock mechanism is arranged in the upper cover body, the driving input end of the first lock mechanism is connected to the lock cover, the inner hole wall of the upper cover flange is provided with a first groove, the outer side wall of the upper cover body is provided with a first through hole, the position of the first through hole corresponds to the first groove, the first lock strip of the first lock mechanism is arranged in the first through hole, and the first lock mechanism is driven by the upward movement / downward reset of the lock cover, so that the first lock strip is retracted / extended to the first groove, thereby releasing / locking the upper cover body and the upper cover flange.

[0008] Preferably, the bottom of the upper cover body is provided with an inner concave accommodating area, the inner side wall of the upper cover body surrounds the outside of the accommodating area, the top of the lower cover is provided with a protruding part, the protruding part is embedded in the accommodating area when the upper cover contacts the lower cover, the upper cover further comprises a second lock mechanism, the second lock mechanism is arranged in the upper cover body, the driving input end of the second lock mechanism is connected to the lock cover, the inner side wall of the upper cover body is provided with a second through hole, the second lock strip of the second lock mechanism is arranged in the second through hole, the lower part of the protruding part is circumferentially formed with an annular second groove, the second lock mechanism is driven by the upward movement of the lock cover, so that the second lock strip is extended to the second groove, thereby locking the upper cover body and the lower cover; and the second lock strip is reset and retracted by the downward reset of the lock cover, thereby releasing the upper cover body and the lower cover.

[0009] Preferably, the lock mechanism of the lower cover is a third lock mechanism, the third lock mechanism is arranged in the lower cover, the driving input end of the third lock mechanism penetrates to the top surface of the lower cover, the inner hole wall of the lower cover flange is provided with a third groove, the outer side wall of the lower cover is provided with a third through hole, the position of the third through hole corresponds to the third groove, the third lock strip of the third lock mechanism is arranged in the third through hole, the third lock mechanism is driven by the contact of the upper cover and the lower cover, so that the third lock strip is retracted, thereby releasing the lower cover and the lower cover flange, and the third lock strip is reset and extended to the third groove by the separation of the upper cover and the lower cover, thereby locking the lower cover and the lower cover flange.

[0010] Preferably, the locking mechanism comprises a locking strip, a driving rod and a connecting rod, the driving rod is movably connected in the upper cover / lower cover in the vertical direction, the locking strip is movably connected in the upper cover / lower cover in the horizontal direction, the top end of the driving rod serves as a driving input end, the bottom end is hingedly connected to one end of the connecting rod, and the other end of the connecting rod is hingedly connected to the locking strip.

[0011] Preferably, the locking mechanism further comprises a gland and an elastic member, the gland is sleeved on the rod segment of the driving rod close to the bottom end and is connected to the upper cover / lower cover where the locking mechanism is located, the rod segment of the driving rod close to the top end is provided with a shaft shoulder, and the two ends of the elastic member are respectively abutted against the gland and the shaft shoulder, so as to drive the driving rod to reset the locking strip when the driving input end is not forced.

[0012] Preferably, the lower cover comprises a through piece, a through hole is arranged in the center of the lower cover, the through piece is sealed and blocked in the through hole, the top of the through piece is used for connecting a driving device of a process equipment component, and the bottom of the through piece is connected to the process equipment component.

[0013] Preferably, the inner holes of the upper cover flange and the lower cover flange are conical surfaces with consistent slopes, the outer sides of the upper cover and the lower cover are also conical surfaces with consistent slopes with the conical surfaces; after the two sealing chambers to be butt-jointed are butt-jointed, the conical surface of the inner hole of the upper cover flange and the conical surface of the inner hole of the lower cover flange are smoothly connected; after the upper cover and the lower cover are butt-jointed, the outer side of the upper cover and the outer side of the lower cover are smoothly connected.

[0014] Preferably, the bottom surface of the upper cover is provided with a first sealing ring, and the top surface of the lower cover flange is provided with a second sealing ring.

[0015] The application further provides an opening and closing method of the double-cover sealing device, which is used for opening and closing the double-cover sealing device and specifically comprises the following steps:

[0016] The two sealing chambers to be butt-jointed are butt-jointed, so that the upper cover contacts the lower cover, thereby driving the locking mechanism of the lower cover to loosen the lower cover and the lower cover flange;

[0017] The locking cover is grabbed by the hoisting grab, so as to drive the locking cover to move upward, thereby driving the locking mechanism of the upper cover to lock the upper cover and the lower cover and loosen the upper cover and the upper cover flange, and then the hoisting grab grabs the upper cover, the lower cover and the process equipment component to move out, thereby completing the opening;

[0018] The locking cover is grabbed by the hoisting grab, so as to drive the upper cover, the lower cover and the process equipment component to reset, and then the hoisting grab loosens the locking cover, so that the locking cover resets downward, thereby driving the locking mechanism of the upper cover to loosen the upper cover and the lower cover and lock the upper cover and the upper cover flange;

[0019] The two sealed chambers to be docked are separated to make the upper cover leave the lower cover, reset the locking mechanism of the lower cover to lock the lower cover and the lower cover flange, so as to complete the closing.

[0020] The application provides a double-cover sealing device, wherein the lower cover is directly connected to a process equipment component, when the process equipment component needs to be inspected and maintained, the double-cover sealing device is opened by a lifting grab, the process equipment component can be directly lifted and moved, no additional device is needed to perform grabbing and moving, and the sealing surfaces of the upper and lower covers are always in close contact during opening and closing and moving, and are not contaminated, meeting the requirements of process equipment inspection and maintenance in the nuclear chemical industry, and therefore can be used for sealing and locking of process equipment in the nuclear chemical industry.

[0021] In the double-cover sealing device, the locking mechanisms between the upper cover and the upper cover flange and between the upper cover and the lower cover are located in the upper cover, and the locking mechanism between the lower cover and the lower cover flange is located in the lower cover, that is, the upper cover assembly and the lower cover assembly are only locked by internal structures, and no locking components need to be arranged outside, so that the possibility of accidental touch is eliminated, and subsequent problems caused by accidental touch are avoided.

[0022] In the docked state, the locking mechanism of the lower cover releases the lower cover and the lower cover flange by contacting the lower cover through the upper cover, and the locking mechanism of the upper cover locks the upper cover and the lower cover and releases the upper cover and the upper cover flange by upward movement of the lock cover, so that when the lifting grab is lifted, the lower cover is separated from the lower cover flange after docking, the upper cover is automatically separated from the upper cover flange by rising through the lock cover and connected to the lower cover, so that the upper and lower covers can be lifted and moved together, thereby completing the lifting of the lower process equipment component of the lower cover and ensuring that the upper and lower covers are in close contact to avoid contamination.

[0023] After the inspection and maintenance are completed, the lifting force of the lifting grab is lost, the lock cover is reset downward, the locking mechanism releases the upper cover and the lower cover and locks the upper cover and the upper cover flange, that is, the upper cover is sealed to the upper cover flange to ensure the sealing of the upper sealed chamber, and is separated from the lower cover so that the upper cover can leave the lower cover when the sealed chamber is separated, and the leaving of the upper cover resets the locking mechanism to lock the lower cover and the lower cover flange, completing the sealing of the lower sealed chamber.

[0024] During the whole process, the double cover sealing device directly uses the lifting and grabbing action and the sealing chamber docking and separating action as the driving operation of the locking mechanism according to the inspection and maintenance requirements of the process equipment parts and the work steps of lifting and resetting. This setting mode fully utilizes the operation actions that the work process already has, that is, the lifting and grabbing action that is already needed to be performed drives the locking cover lifting, the locking cover lifting drives the locking mechanism action of the upper cover, the contact and separation action of the upper and lower covers caused by the sealing chamber docking and separating action that is already needed to be performed drives the locking mechanism action of the lower cover. Therefore, no additional power components and control mechanisms are needed, and no locking operation steps are needed. The locking and unlocking are automatically realized in the original operation process through the simple mechanical structure, which is ingenious and reasonable in layout. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structure schematic diagram of the double cover sealing device in the non-docking state in embodiment 1 of the present application;

[0026] Figure 2 is a structure schematic diagram of the locking mechanism 5 of the double cover sealing device in embodiment 1 of the present application;

[0027] Figure 3 is a structure schematic diagram of the double cover sealing device in the docking state in embodiment 1 of the present application;

[0028] Figure 4 is a structure schematic diagram of the double cover sealing device in the opening state in embodiment 1 of the present application.

[0029] In the figure: 1, upper cover flange; 11, first groove; 2, upper cover; 21, locking cover;

[0030] 22, upper cover body; 221, accommodation area; 222, first empty area; 23, first sealing ring; 24, cover plate; 3, lower cover flange; 31, third groove; 32, second sealing ring; 4, lower cover; 41, protruding part; 411, second groove; 42, through part; 43, second empty area; 5, locking mechanism; 51, first locking mechanism; 52, second locking mechanism; 53, third locking mechanism; 54, locking bar; 541, first locking bar; 542, second locking bar; 543, third locking bar; 55, driving rod; 56, connecting rod; 57, pin; 58, gland; 581, sealing ring; 59, elastic part; 6, process equipment part. DETAILED DESCRIPTION

[0031] The technical solutions of the invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without creative effort are within the scope of the invention.

[0032] In the description of this invention, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience and simplification of the description and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] In the description of this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "setting," "installation," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Example 1

[0036] like Figures 1 to 4 As shown, the double-cover sealing device of this embodiment includes an upper cover assembly and a lower cover assembly. The upper cover assembly includes an upper cover flange 1 and an upper cover 2, and the lower cover assembly includes a lower cover flange 3 and a lower cover 4. The upper cover flange 1 and the lower cover flange 3 are respectively connected to the walls of the two sealing chambers to be connected. The upper cover 2 and the lower cover 4 are respectively disposed in the upper cover flange 1 and the lower cover flange 3. A process equipment component 6 is connected to the lower cover 4. The upper cover 2 includes a locking cover 21 that can move up and down. Both the upper cover 2 and the lower cover 4 are provided with a locking mechanism 5. The locking mechanism 5 of the upper cover 2 can lock the upper cover 2 and the lower cover 4 and release the upper cover 2 and the upper cover flange 1 when the locking cover 21 moves upward, and release the upper cover 2 and the lower cover 4 and lock the upper cover 2 and the upper cover flange 1 when the locking cover 21 returns to its downward position. The locking mechanism 5 of the lower cover 4 can release the lower cover 4 and the lower cover flange 3 when the upper cover 2 contacts the lower cover 4, and return to lock the lower cover 4 and the lower cover flange 3 when the upper cover 2 leaves the lower cover 4.

[0037] The lower cover 4 of the double cover sealing device is directly connected with the process equipment component 6, when the process equipment component 6 needs to be inspected and maintained, the double cover sealing device is opened by the lifting grab, the process equipment component 6 can be directly lifted and moved, no additional device is needed to perform grabbing and moving, and the sealing surfaces of the upper cover 2 and the lower cover 4 are always in close contact during opening and closing and moving, and will not be contaminated, meeting the requirements of process equipment inspection and maintenance in the field of nuclear and chemical engineering, so it can be used for sealing and locking of process equipment in the field of nuclear and chemical engineering.

[0038] And the locking mechanism 5 between the upper cover 2 and the upper cover flange 1, and the locking mechanism 5 between the upper cover 2 and the lower cover 4 in the double cover sealing device are located inside the upper cover 2, and the locking mechanism 5 between the lower cover 4 and the lower cover flange 3 is located inside the lower cover 4, that is, the upper cover assembly and the lower cover assembly are only locked by the internal structure, and no locking components are needed outside, so that the possibility of accidental touch is eliminated, and subsequent problems caused by accidental touch are avoided.

[0039] When subjected to lifting and grabbing, the lower cover 4 is disconnected from the lower cover flange 3 after docking, the upper cover 2 is lifted by the locking cover 21 to automatically disconnect from the upper cover flange 1 and connect with the lower cover 4, so that the upper cover 2 and the lower cover 4 can be lifted and moved together, thereby completing the lifting of the lower process equipment component 6 of the lower cover 4, and ensuring that the surfaces of the upper cover 2 and the lower cover 4 are in close contact to avoid contamination.

[0040] After the inspection and maintenance is completed, the lifting force of the lifting grab is lost, the locking cover 21 is reset downward, the locking mechanism 5 is loosened to lock the upper cover 2 and the lower cover 4 and the upper cover flange 1; that is, the upper cover 2 is sealed to the upper cover flange 1 to ensure the sealing of the upper sealing chamber, and is disconnected from the lower cover 4, so that the upper cover 2 can be separated from the lower cover 4 after the sealing chamber is separated. The separation of the upper cover 2 resets the locking mechanism 5 to lock the lower cover 4 and the lower cover flange 3, completing the sealing of the lower sealing chamber.

[0041] In the above entire process, the double cover sealing device directly uses the lifting and grabbing action and the close contact action of the upper and lower covers as the driving operation of the locking mechanism 5 according to the inspection and maintenance requirements of the process equipment component 6 and the working steps of lifting and resetting, which fully utilizes the operation actions that the working process already has. Not only no additional power components and control mechanisms are needed, but also no locking operation steps are needed, and the locking and loosening are automatically realized in the original operation process through simple mechanical structure, which is ingenious and reasonable in layout. And the entire structure only needs to be moved vertically, without radial positioning requirement, so the operation is very simple.

[0042] In the embodiment, the upper cover 2 further comprises an upper cover body 22, and the lock cover 21 is movably connected to the upper portion of the upper cover body 22 in the vertical direction. The set of locking mechanisms 5 of the upper cover 2 is a first locking mechanism 51, which is arranged in the upper cover body 22, and the driving input end of the first locking mechanism 51 is connected to the lock cover 21. The inner hole wall of the upper cover flange 1 is provided with a first groove 11, and the upper cover body 22 is provided with a first through hole, the position of the first through hole corresponding to the first groove 11. The first locking strip 541 of the first locking mechanism 51 is arranged in the first through hole. The first locking mechanism 51 is driven by the upward movement / downward reset of the lock cover 21, so that the first locking strip 541 is retracted / extended to the first groove 11, thereby releasing / locking the upper cover body 22 and the upper cover flange 1.

[0043] Specifically, as shown in Figure 2 The first locking mechanism 51 and the second locking mechanism 52 and the third locking mechanism 53 described later are all locking mechanisms 5, which all comprise a locking strip 54. The locking strip 54 of the first locking mechanism 51 is referred to as a first locking strip 541, the locking strip 54 of the second locking mechanism 52 is referred to as a second locking strip 542, and the locking strip 54 of the third locking mechanism 53 is referred to as a third locking strip 543. In addition to the locking strip 54, the locking mechanism 5 further comprises a driving rod 55, a connecting rod 56 and a pin 57. The driving rod 55 is movably connected to the upper cover 2 / lower cover 4 in the vertical direction, and the locking strip 54 is movably connected to the upper cover 2 / lower cover 4 in the horizontal direction. The top end of the driving rod 55 serves as a driving input end, and the bottom end is hingedly connected to one end of the connecting rod 56 through the pin 57. The other end of the connecting rod 56 is hingedly connected to the locking strip 54 through the pin 57.

[0044] In the first locking mechanism 51, the bottom end of the driving rod 55 is in the same horizontal plane as the first locking strip 541 in the initial position. When the lock cover 21 is moved upward by the lifting force of the hoisting grab, the driving rod 55 rises along with it, thereby driving the first locking strip 541 to move horizontally inward and retract from the first groove 11 of the upper cover flange 1, so that the upper cover flange 1 and the upper cover 2 are no longer locked. When the lock cover 21 is no longer subjected to the lifting force, it will reset downward. At this time, the driving rod 55 descends along with it, thereby driving the first locking strip 541 to move horizontally outward and extend into the first groove 11 of the upper cover flange 1, thereby achieving the locking of the upper cover 2 and the upper cover flange 1.

[0045] In order to ensure the movement of the first locking strip 541, the driving rod 55 and the connecting rod 56, the bottom of the upper cover body 22 is further provided with a first empty area 222. The locking mechanism 5 further comprises a gland 58, which is connected in the first empty area 222 and is sleeved on the rod segment of the driving rod 55 close to the bottom end. The rod segment of the first locking strip 541 inside the upper cover body 22, the bottom end of the driving rod 55 and the connecting rod 56 are all located in the first empty area 222.

[0046] The top surface of the upper cover body 22 is provided with a counterbore, which is a stepped hole, and the lock cover 21 is arranged in the counterbore. The top of the counterbore is connected with a cover plate 24 with a through hole. The outer side surface of the lock cover 21 is provided with a protruding step. The body of the lock cover 21 can move upward through the through hole of the cover plate 24 by a certain distance, and the step on the outer side surface of the lock cover 21 is limited by the cover plate 24 to avoid being pulled out of the counterbore.

[0047] In the embodiment, the bottom of the upper cover body 22 is provided with a concave accommodating area 221, and the inner side wall of the upper cover body 22 surrounds the outside of the accommodating area 221. The top of the lower cover 4 is provided with a protruding portion 41. When the upper cover 2 contacts the lower cover 4, the protruding portion 41 is embedded in the accommodating area 221. The upper cover 2 further has a second locking mechanism 52. The second locking mechanism 52 is arranged in the upper cover body 22, and the driving input end thereof is connected with the lock cover 21. The inner side wall of the upper cover body 22 is provided with a second through hole, and the second locking strip 542 of the second locking mechanism 52 is arranged in the second through hole. The lower side of the protruding portion 41 is circumferentially formed with an annular second groove 411. The second locking mechanism 52 is driven by the upward movement of the lock cover 21, so that the second locking strip 542 extends into the second groove 411 to lock the upper cover body 22 and the lower cover 4. The second locking strip 542 is reset and retracted by the downward reset of the lock cover 21, so as to release the upper cover body 22 and the lower cover 4.

[0048] Specifically, in the second locking mechanism 52, the initial position of the driving rod 55 is lower than the horizontal plane where the second locking strip 542 is located. When the lock cover 21 is moved upward by the lifting force of the hoisting grab, the driving rod 55 is driven to rise, thereby driving the second locking strip 542 to move horizontally outward and extend into the second groove 411 of the protruding portion 41, so as to lock the upper cover 2 and the lower cover 4. When the lock cover 21 is no longer subjected to the lifting force, it will be reset downward. At this time, the driving rod 55 is driven to descend, thereby driving the second locking strip 542 to move horizontally inward and retract from the second groove 411 of the protruding portion 41, so as to release the upper cover 2 and the lower cover 4.

[0049] Similarly, in the second locking mechanism 52, the rod segment of the second locking strip 542 inside the upper cover body 22, the bottom end of the driving rod 55, and the connecting rod 56 are all located in the first empty area 222 arranged on the upper cover body 22.

[0050] The second locking mechanism 52 further includes a gland 58 and an elastic member 59. The gland 58 is sleeved on the rod segment of the driving rod 55 close to the bottom end and is connected in the first empty area 222. The rod segment of the driving rod 55 close to the top end is provided with a shaft shoulder. The two ends of the elastic member 59 abut against the gland 58 and the shaft shoulder, respectively. When the driving input end is not subjected to force, i.e., when the lock cover 21 is in the downward reset state, the elastic member 59 drives the driving rod 55 to retract and reset the second locking strip 542.

[0051] In this embodiment, the bottom opening edge of the accommodating area 221 is provided with a chamfer, the outer side of the top of the protruding part 41 is provided with an outwardly convex snap ring, the outer side of the top edge of the snap ring is also provided with a chamfer, and when the upper cover 2 and the lower cover 4 are butted, the chamfers of the two are matched, which can play a butting guiding role and effectively improve the positioning and connecting efficiency. Moreover, the lower part of the snap ring can be used as the second groove 411 to realize the locking cooperation with the second locking strip 542.

[0052] In this embodiment, the locking mechanism 5 of the lower cover 4 is a third locking mechanism 53, which is arranged in the lower cover 4, and the driving input end thereof penetrates to the top surface of the lower cover 4. The inner hole wall of the lower cover flange 3 is provided with a third groove 31, and the outer side wall of the lower cover 4 is provided with a third through hole, the position of which corresponds to the third groove 31. The third locking strip 543 of the third locking mechanism 53 is arranged in the third through hole. The third locking mechanism 53 is driven by the contact between the upper cover 2 and the lower cover 4, so that the third locking strip 543 is retracted to release the lower cover 4 and the lower cover flange 3, and the locking strip 54 is reset to extend to the third groove 31 by the upper cover 2 leaving the lower cover 4, so as to lock the lower cover 4 and the lower cover flange 3.

[0053] Similarly, in the third locking mechanism 53, the rod segment of the third locking strip 543 inside the lower cover 4, the bottom end of the driving rod 55, and the connecting rod 56 are all located in the second empty area 43 arranged on the lower cover 4.

[0054] The third locking mechanism 53 further includes a gland 58 and an elastic member 59. The gland 58 is sleeved on the rod segment of the driving rod 55 close to the bottom end and is connected in the second empty area 43. The rod segment of the driving rod 55 close to the top end is provided with a shaft shoulder, and the two ends of the elastic member 59 abut against the gland 58 and the shaft shoulder, respectively, for driving the driving rod 55 to drive the third locking strip 543 to extend and reset when the driving input end is not stressed.

[0055] In this embodiment, a sealing ring 581 can be arranged at the through hole through which the driving rod 55 passes in the gland 58, for sealing the driving rod 55.

[0056] Specifically, in the third locking mechanism 53, the initial position bottom end of the driving rod 55 and the third locking strip 543 are located in the same horizontal plane. When the lower surface of the upper cover 2 abuts against the upper surface of the lower cover 4, the driving rod 55 is pressed and driven to descend, thereby driving the third locking strip 543 to move horizontally inward and retract from the third groove 31, so as to release the lower cover 4 and the lower cover flange 3. When the upper cover 2 leaves the lower cover 4, the driving rod 55 rises under the elastic force of the elastic member 59, thereby driving the third locking strip 543 to move horizontally outward and extend into the third groove 31, so as to lock the lower cover 4 and the lower cover flange 3.

[0057] In the embodiment, the lower cover 4 comprises a through member 42, the lower cover 4 is provided with a through hole in the center, the through member 42 is sealed and blocked in the through hole, the top of the through member 42 is used for connecting the driving device of the process equipment component 6, and the bottom of the through member 42 is connected with the process equipment component 6. In the embodiment, the through hole and the through member 42 are arranged in the protruding part 41, the through member 42 in the inside of the protruding part 41 can be provided with a connecting member and a shaft coupling, and is provided with a sealing device. Due to the through member 42, the connection between the lower cover 4 and the process equipment component 6 can be realized, and the sealing can be realized when the connecting member moves axially and reciprocally. When in the working state, the process equipment component 6 in the sealing chamber can be driven and connected with the driving device, and there is no sealing leakage problem, and no additional sealing component is needed, and the opening and closing hoisting operation can be directly performed when maintenance is needed.

[0058] In the embodiment, the inner holes of the upper cover flange 1 and the lower cover flange 3 are conical surfaces with consistent slopes, the outer sides of the upper cover 2 and the lower cover 4 are also conical surfaces with consistent slopes with the conical surfaces; after the two sealing chambers to be butt-jointed are butt-jointed by the upper cover flange 1 and the lower cover flange 3, the conical surfaces of the inner holes of the upper cover flange 1 and the lower cover flange 3 are smoothly connected; after the upper cover 2 and the lower cover 4 are butt-jointed, the outer sides of the upper cover 2 and the lower cover 4 are smoothly connected.

[0059] In this matching mode, there are guide inclined surfaces between the upper cover 2 and the upper cover flange 1, and between the lower cover 4 and the lower cover flange 3, and there are also guide inclined surfaces between the whole upper cover 2 and the lower cover 4 and the whole upper cover flange 1 and the lower cover flange 3, so that the structure is regular and the opening and closing are more convenient.

[0060] In the embodiment, the bottom surface of the upper cover 2 is provided with a first sealing ring 23, and the top surface of the lower cover flange 3 is provided with a second sealing ring 32. That is, the two groups of sealing ring assemblies of the first sealing ring 23 and the second sealing ring 32 are arranged in the shape of an axis of a coordinate system. In this arrangement mode, there are sealing surfaces in each quadrant, so that the double-cover sealing device has a sealing boundary in each state.

[0061] Specifically, when the upper cover assembly and the lower cover assembly are separated, the joint between the upper cover 2 and the upper cover flange 1 is tightly sealed by the first sealing ring 23, and the joint between the lower cover 4 and the lower cover flange 3 is tightly sealed by the second sealing ring 32; when the double-cover sealing device is opened, the joint between the upper cover 2 and the lower cover 4 is tightly sealed by the first sealing ring 23, and the joint between the upper cover flange 1 and the lower cover flange 3 is tightly sealed by the second sealing ring 32; when the double-cover sealing device is docked and closed, the first sealing ring 23 and the second sealing ring 32 together seal the four circumferential joints (the upper cover 2 and the lower cover 4, the upper cover 2 and the upper cover flange 1, the upper cover flange 1 and the lower cover flange 3, and the lower cover 4 and the lower cover flange 3), and under the gravity of the equipment to which the upper cover assembly belongs, the sealing rings of each contact surface are compacted, thereby ensuring the sealing of the sealed cabin and the space connected to the process equipment in the double-cover docking state, and preventing the atmosphere in the process equipment from leaking.

[0062] In the double-cover sealing device, the upper cover assembly can be arranged at a circular hole of a sealed cabin base, and the lower cover assembly can be arranged on a process equipment that can be replaced and maintained. The locking, unlocking and sealing between the upper cover 2 and the upper cover flange 1, the upper cover 2 and the lower cover 4, and the lower cover 4 and the lower cover flange 3 are achieved by the pure mechanical structure action of the device. The mechanical mechanism action can be achieved by external force and a non-active energy storage mechanism. By using the device, after the double covers are docked, the engagement of the double covers, the unlocking of the upper cover 2 and the upper cover flange 1, and the opening and closing of the double covers can be achieved by remote operation (without manual operation, through a special grabber tool). When the double covers are opened, the space between the special maintenance equipment transfer cabin and the process equipment is communicated, and the subsequent maintenance, transfer and replacement tasks are completed, and the sealing performance is guaranteed throughout the process. In addition, the unlocking anti-disengagement mechanism is integrated in the locking mechanism 5 of the upper cover 2 and the lower cover 4 in a multi-point synchronous manner, without other external anti-disengagement mechanisms. The lower cover 4 can serve as a component of the process equipment, realizing the roles of sealing and transmission connection, and improving the utilization rate of the component.

[0063] Embodiment 2

[0064] The opening and closing method of the double-cover sealing device of the embodiment is used to open and close the double-cover sealing device in Embodiment 1, and specifically includes the following steps:

[0065] The initial state is a non-docking state, as shown in Figure 1 , other items above the lower cover assembly are removed to expose the docking surface of the lower cover assembly, the sealed cabin as a whole (the upper cover assembly is arranged at the bottom of the sealed cabin) is hoisted by a lifting tool at the lower cover assembly, the center of the upper cover assembly is roughly aligned with the center of the lower cover assembly, the sealed cabin is slowly lowered, and the double covers are docked.

[0066] As shown in Figure 3As shown, after the two sealed chambers to be docked (i.e. the sealed chamber with the upper cover assembly and the process equipment with the lower cover assembly) are docked, the upper cover 2 contacts the lower cover 4, thereby driving the locking mechanism 5 of the lower cover 4 to release the lower cover 4 and the lower cover flange 3.

[0067] like Figure 4 As shown, the locking cover 21 is gripped by a hoisting grabber, which drives the locking cover 21 to move upward, thereby driving the locking mechanism 5 of the upper cover 2 to lock the upper cover 2 and the lower cover 3 and loosen the upper cover 2 and the upper cover flange 1. Then, the hoisting grabber grabs the upper cover 2, the lower cover 3 and the process equipment component 6 and moves them out, thereby completing the opening. Specifically, a special hoisting tool and grabber are lowered into the inner hole of the locking cover 21. After the grabber hooks the locking cover 21, the special hoisting tool is operated to continue to rise, completing the opening of the double cover. At the same time, the process equipment that needs to be repaired is lifted together and enters the repair and transfer compartment through the sealed compartment. After the double cover and the repair components are raised to the designated position, the repair and transfer compartment on the sealed compartment can be transferred to the designated area for repair and replacement according to actual needs.

[0068] After the process is completed, the maintenance transfer compartment, along with the double-cover device and process equipment, is reconnected to the sealed compartment. The double covers and process equipment are then lowered using lifting equipment. When the lower cover 4 is lowered into the inner hole of the lower cover flange 3, the upper cover 2 is returned to the inner hole of the upper cover flange 1, and the locking cover 21 is also lowered into place. Figure 3 As shown, the lifting gripper grabs the lock cover 21, causing the upper cover 2, lower cover 3 and process equipment component 6 to reset. Then the lifting gripper releases the lock cover 21, causing the lock cover 21 to reset downwards, so that the locking mechanism 5 of the upper cover 2 releases the upper cover 2 and lower cover 4 and locks the upper cover 2 and upper cover flange 1.

[0069] Separate the two sealed chambers to be docked, such as Figure 1 As shown, this allows the upper cover 2 to separate from the lower cover 4, and the locking mechanism 5 of the lower cover 4 to reset and lock the lower cover 4 and the lower cover flange 3, thereby completing the closing.

[0070] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A double-cap sealing device, characterized in that: Includes the upper cover assembly and the lower cover assembly. The upper cover assembly includes an upper cover flange (1) and an upper cover (2), and the lower cover assembly includes a lower cover flange (3) and a lower cover (4). The upper cover flange (1) and the lower cover flange (3) are respectively connected to the walls of the two sealing chambers to be docked. The upper cover (2) and the lower cover (4) are respectively disposed in the upper cover flange (1) and the lower cover flange (3). A process equipment component (6) is connected to the lower cover (4). The upper cover (2) includes a locking cover (21) that can move up and down. Both the upper cover (2) and the lower cover (4) are provided with locking mechanisms (5). The locking mechanism (5) of the upper cover (2) can lock the upper cover (2) and the lower cover (4) and release the upper cover (2) and the upper cover flange (1) when the lock cover (21) moves upward, and release the upper cover (2) and the lower cover (4) and lock the upper cover (2) and the upper cover flange (1) when the lock cover (21) returns to its downward position; The locking mechanism (5) of the lower cover (4) can release the lower cover (4) and the lower cover flange (3) when the upper cover (2) contacts the lower cover (4), and reset and lock the lower cover (4) and the lower cover flange (3) when the upper cover (2) leaves the lower cover (4).

2. The double-cap sealing device according to claim 1, characterized in that: The upper cover (2) also includes an upper cover body (22), and a locking cover (21) is movably connected to the upper part of the upper cover body (22) in the vertical direction. The upper cover (2) has a set of locking mechanisms (5) which is the first locking mechanism (51). The first locking mechanism (51) is located inside the upper cover body (22), and its drive input end is connected to the lock cover (21). The inner wall of the upper cover flange (1) is provided with a first groove (11), and the outer wall of the upper cover body (22) is provided with a first through hole. The position of the first through hole corresponds to the first groove (11). The first locking bar (541) of the first locking mechanism (51) is located in the first through hole. The first locking mechanism (51) is driven by the upward movement / downward reset of the lock cover (21), causing the first locking bar (541) to retract / extend into the first groove (11) to release / lock the upper cover body (22) and the upper cover flange (1).

3. The double-cap sealing device according to claim 2, characterized in that: The bottom of the upper cover body (22) is provided with a recessed receiving area (221), and the inner sidewall of the upper cover body (22) surrounds the receiving area (221). The top of the lower cover (4) is provided with a protrusion (41). When the upper cover (2) contacts the lower cover (4), the protrusion (41) is embedded in the receiving area (221). The upper cover (2) also has a second locking mechanism (52), which is located inside the upper cover body (22). Its drive input end is connected to the lock cover (21). The inner side wall of the upper cover body (22) is provided with a second through hole. The second locking bar (542) of the second locking mechanism (52) is located in the second through hole. A second annular groove (411) is formed circumferentially below the protrusion (41). The second locking mechanism (52) is driven by the upward movement of the locking cover (21) to extend the second locking bar (542) into the second groove (411) to lock the upper cover body (22) and the lower cover (4); and by the downward reset of the locking cover (21), the second locking bar (542) is reset and retracted to release the upper cover body (22) and the lower cover (4).

4. The double-cap sealing device according to claim 1, characterized in that: The locking mechanism (5) of the lower cover (4) is a third locking mechanism (53), which is located inside the lower cover (4) and its drive input end extends to the top surface of the lower cover (4). The inner wall of the lower cover flange (3) is provided with a third groove (31), and the outer wall of the lower cover (4) is provided with a third through hole. The position of the third through hole corresponds to the third groove (31). The third locking bar (543) of the third locking mechanism (53) is provided in the third through hole. The third locking mechanism (53) is driven by the contact between the upper cover (2) and the lower cover (4), causing the third locking bar (543) to retract, thereby releasing the lower cover (4) and the lower cover flange (3), and by the upper cover (2) leaving the lower cover (4), the locking bar (54) is reset and extends to the third groove (31), thereby locking the lower cover (4) and the lower cover flange (3).

5. The double-cap sealing device according to any one of claims 1 to 4, characterized in that: The locking mechanism (5) includes a locking bar (54), a drive rod (55), and a connecting rod (56). The drive rod (55) is vertically connected to the upper cover (2) / lower cover (4) where the locking mechanism (5) is located, and the locking bar (54) is horizontally connected to the upper cover (2) / lower cover (4) where the locking mechanism (5) is located. The top end of the drive rod (55) serves as the drive input end, and the bottom end is hinged to one end of the connecting rod (56), while the other end of the connecting rod (56) is hinged to the lock bar (54).

6. The double-cap sealing device according to claim 5, characterized in that: The locking mechanism (5) further includes a pressure cap (58) and an elastic element (59). The pressure cap (58) is fitted onto the section of the drive rod (55) near the bottom end and connects to the upper cover (2) / lower cover (4) where the locking mechanism (5) is located. The drive rod (55) has a shoulder near the top end. The two ends of the elastic element (59) abut against the pressure cap (58) and the shaft shoulder respectively, and are used to drive the drive rod (55) to reset the lock bar (54) when the drive input end is not under force.

7. The double-cap sealing device according to claim 1, characterized in that: The lower cover (4) includes a through member (42), The lower cover (4) has a through hole in the center, and the through part (42) is sealed in the through hole. The top of the through part (42) is used to connect the driving device of the process equipment component (6), and the bottom of the through part (42) is connected to the process equipment component (6).

8. The double-cap sealing device according to claim 1, characterized in that: The inner hole of the upper cover flange (1) and the inner hole of the lower cover flange (3) are conical surfaces with the same slope. The outer surface of the upper cover (2) and the outer surface of the lower cover (4) are also conical surfaces with the same slope as the conical surface. After the two sealing chambers containing the upper cover flange (1) and the lower cover flange (3) are connected, the inner conical surface of the upper cover flange (1) and the inner conical surface of the lower cover flange (3) are smoothly connected; after the upper cover (2) and the lower cover (4) are connected, the outer surface of the upper cover (2) and the outer surface of the lower cover (4) are smoothly connected.

9. The double-cap sealing device according to claim 8, characterized in that: The outer edge of the bottom surface of the upper cover (2) is provided with a first sealing ring (23), and the inner edge of the top surface of the lower cover flange (3) is provided with a second sealing ring (32).

10. A method for opening and closing a double-cap sealing device, characterized in that, The method for opening and closing the double-cap sealing device according to any one of claims 1 to 9 specifically includes the following steps: The two sealed chambers to be docked are docked so that the upper cover (2) contacts the lower cover (4), thereby driving the locking mechanism (5) of the lower cover (4) to release the lower cover (4) and the lower cover flange (3); The locking cover (21) is grabbed by the hoisting gripper, which drives the locking cover (21) to move upward, thereby driving the locking mechanism (5) of the upper cover (2) to lock the upper cover (2) and the lower cover (4) and loosen the upper cover (2) and the upper cover flange (1). Then the hoisting gripper grabs the upper cover (2), the lower cover (4) and the process equipment parts (6) and moves them out, thereby completing the opening. The locking cover (21) is grabbed by the hoisting gripper to drive the upper cover (2), lower cover (4) and process equipment components (6) to reset. Then the hoisting gripper releases the locking cover (21), thereby causing the locking cover (21) to reset downwards, so that the locking mechanism (5) of the upper cover (2) releases the upper cover (2) and the lower cover (4) and locks the upper cover (2) and the upper cover flange (1). Separate the two sealing chambers to be docked so that the upper cover (2) leaves the lower cover (4) and the locking mechanism (5) of the lower cover (4) resets and locks the lower cover (4) and the lower cover flange (3), thereby completing the closing.

Images