CN219225917U - Closing cap opening and closing device based on radioactive waste steel drum - Google Patents

Abstract

The utility model discloses a cover closing and opening device based on a radioactive waste steel drum, which relates to the field of radioactive waste transportation and comprises a bottom plate; the shielding container is fixedly arranged on the upper plane of the bottom plate; the shielding container is configured for placement of the steel drum; the cover is movably arranged on the bottom plate through the sliding component; the top of the cover is additionally provided with a bracket, and a lifting assembly and a sealing cover grabbing assembly fixed in the lifting assembly are arranged in the bracket; a bolt torsion component is arranged in the cover; after the cover moves to the position right above the shielding container, the bolt torsion assembly is configured to firstly screw the fastening bolt on the sealing cover, then the sealing cover grabbing assembly is configured to grab the neck of the sealing cover, and finally the lifting assembly moves upwards to separate the sealing cover from the steel drum body. The automatic cover opening and cover closing device can automatically open and close the steel drum in the shielding container, so that manual operation is greatly reduced, safety of operators is guaranteed, and the risk of leakage of radioactive substances to the environment is effectively reduced.

Description

Closing cap opening and closing device based on radioactive waste steel drum

Technical Field

The utility model relates to the field of radioactive waste transportation, in particular to an opening and closing device for a steel drum sealing cover in the radioactive waste transportation process.

Background

The process of transferring radioactive waste is generally to inject the waste with an overdose of radiation into a steel drum in a shielded container and then transfer the drum to a container in a waste treatment center for cement curing.

The traditional shielding container and the steel drum are required to be opened and closed, so that too many working procedures are needed to be manually operated, workers are in a radioactive substance environment for a long time, and the risk level of contacting radioactive substances and the like is obviously increased; therefore, optimizing the structural composition of the traditional shielding container and minimizing the manual participation is the direction of current research, especially for the operations of opening and closing the cover of the steel drum, the design of the radioactive waste shielding container for solving the problems is necessary, and the opening and closing device for simultaneously providing the steel drum cover is necessary.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model provides the capping opening and closing device based on the radioactive waste steel drum, and the safe transfer of the radioactive waste is effectively completed by adopting the device, so that the purposes of optimizing the structure of the shielding device and reducing the manual participation are achieved.

Specifically, the detailed technical scheme provided by the utility model is as follows:

a cover opening and closing device based on radioactive waste steel drum comprises

A bottom plate;

the shielding container is fixedly arranged on the upper plane of the bottom plate; the shielding container is configured for placement of a steel drum;

the cover is movably arranged on the bottom plate through the sliding component; a bracket is additionally arranged at the top of the cover, and a lifting assembly and a sealing cover grabbing assembly fixed in the lifting assembly are arranged in the bracket; a bolt torsion component is arranged in the cover;

after the cover moves to the position right above the shielding container, the bolt torsion assembly is configured to firstly screw the fastening bolt on the sealing cover, then the sealing cover grabbing assembly is configured to grab the neck of the sealing cover, and finally the lifting assembly moves upwards to lift the sealing cover grabbing assembly and the sealing cover at the same time, so that the sealing cover and the steel drum body are separated.

Further, the lifting assembly comprises a driving source, a shaft sleeve nut, a lifting shaft and a base plate;

the shaft sleeve nut is rotatably embedded in the bracket; external threads are engraved on the outer surface of the lifting shaft, and the lifting shaft is in threaded connection with the shaft sleeve nut; the substrate is fixed at the bottom of the lifting shaft, and the cover grabbing component is fixed at the lower bottom surface of the substrate;

the driving source drives the shaft sleeve nut to rotate, and the lifting shaft and the base plate move up and down in a spiral transmission mode.

Further, the lifting assembly further comprises a lower shaft sleeve embedded in the cover; the inner surface of the shaft sleeve is also provided with a vertical guide groove;

a guide piece is fixed at the lower section of the lifting shaft, is arranged in the guide groove and can move up and down along the guide groove; when the shaft sleeve nut rotates, the lifting shaft only moves axially under the cooperation of the guide piece and the guide groove and does not rotate around the axis.

Further, the cover grabbing assembly comprises at least two grabbing slide blocks, and the grabbing slide blocks are distributed in an equiangular array by taking the center of the substrate as the center of the circle; all the gripper sliding blocks are slidably arranged on the lower surface of the substrate and are in linkage arrangement; each gripper slide block is provided with a hook part;

all the gripper sliding blocks move in a linkage way so that the hook parts are close to or far away from each other, and further the neck part of the sealing cover is clamped or loosened.

Further, the cover grabbing assembly further comprises a turntable and a plurality of connecting rod mechanisms;

the connecting rod mechanisms are in one-to-one correspondence with the gripper sliding blocks, and the gripper sliding blocks are movably connected with the turntable through the connecting rod mechanisms;

the rotation of the turntable drives all the gripper blocks to be linked.

Further, the device also comprises a hand wheel assembly, wherein the hand wheel assembly comprises a rotating shaft and a hand wheel disc; the hand wheel disc is fixed at the top of the rotating shaft; the turntable is fixed at the bottom of the rotating shaft; the hand wheel disc drives the turntable to rotate through a rotating shaft;

the rotating shaft is coaxially arranged with the lifting shaft and is internally arranged in the lifting shaft; an upper bearing and a lower bearing are fixedly arranged between the rotating shaft and the lifting shaft, and the rotating shaft rotates relative to the lifting shaft through the upper bearing and the lower bearing and simultaneously moves up and down along with the lifting shaft.

Further, the bolt torsion assembly comprises a torsion bar, the torsion bar penetrates through the cover and the base plate, and the bottom of the torsion bar extends out of the base plate; the bottom of the torsion bar is provided with a hexagonal sleeve; the torsion bar is sleeved in the hexagon bolt of the sealing cover through the hexagon sleeve, and the torsion bar is rotated to screw and loosen the hexagon bolt.

Further, the bolt torsion assembly further comprises an upper shaft sleeve and a lower shaft sleeve; the upper shaft sleeve is embedded and fixed in the cover, and the lower shaft sleeve is embedded and fixed in the base plate;

the torsion bar is connected with the cover in a relative rotation way through the upper shaft sleeve and the lower shaft sleeve.

Further, the torsion bar is a stepped shaft, and specifically comprises a first shaft lever, a second shaft lever and a third shaft lever, wherein the diameters of the first shaft lever, the second shaft lever and the third shaft lever are gradually increased; the first shaft rod is sleeved in the upper shaft sleeve; the third shaft rod is sleeved in the lower shaft sleeve;

in the process of up-and-down movement of the torsion bar, a first stage step formed by the first shaft lever and the second shaft lever is an upper limit position when the first stage step is attached to the upper shaft sleeve; the second-stage steps formed by the second shaft rod and the third shaft rod are lower limit when being attached to the lower shaft sleeve.

Further, the bolt torsion assembly further comprises a first spring sleeved on the torsion bar, and the first spring is located between the upper shaft sleeve and the second-stage step.

Further, the shielding container comprises a body, wherein a containing cavity is formed in the body and is configured for placing the steel drum.

Further, a plurality of guide strips are fixed at the notch of the accommodating cavity, guide holes are formed in the upper end of each guide strip, and the guide holes correspond to the fastening bolts on the sealing cover in position; a portion of the shank of the fastening bolt is positioned within the guide bore when the steel drum is placed within the receiving cavity.

Further, a push rod is arranged at the bottom of the accommodating cavity, and the push rod is elastically connected with the shielding container through a second spring; the upper end part and the lower end part of the ejector rod penetrate out of the shielding container;

the lower end part of the ejector rod is of a conical structure, and a proximity switch is arranged on the outer surface of the shielding container; after the accommodating cavity of the steel drum is completely in place, the steel drum presses down the ejector rod through self gravity and enables the second spring to be compressed, and the lower end portion of the ejector rod moves downwards to be close to the proximity switch so as to trigger the proximity switch.

The beneficial effects achieved by adopting the technical scheme are as follows:

the cover opening and closing device provided by the scheme can realize automatic cover opening and cover closing of the steel drum in the shielding container through the field control cabinet or the remote control, so that manual operation is greatly reduced, safety and health of operators are ensured, and the risk of leakage of radioactive substances to the environment is effectively reduced.

Drawings

FIG. 1 is a schematic diagram of a current transport system.

Fig. 2 is a block diagram of the lid opening/closing device according to the present embodiment.

Fig. 3 is a structural view of the steel tub.

Fig. 4 is a cross-sectional view of the lid opening/closing device.

Fig. 5 is a partial enlarged view at a in fig. 4.

Fig. 6 is a plan view of the closure grasping assembly.

Fig. 7 is a schematic diagram of the crank block structure.

Fig. 8 is a cross-sectional view of the bolt torque assembly.

Fig. 9 is a cross-sectional view of the shielded container.

Wherein: 10 bottom plate, 11 driving motor, 12 slide rail, 20 shielding container, 21 body, 22 guide bar, 23 ejector pin, 24 proximity switch, 30 cover, 31 support, 41 driving source, 42 sleeve nut, 43 lifting shaft, 44 base plate, 45 pinion, 46 big gear, 47 guide sleeve, 51 claw slide block, 52 carousel, 53 link mechanism, 61 rotation axis, 62 roulette, 63 upper bearing, 64 lower bearing, 71 torsion bar, 72 upper sleeve, 73 lower sleeve, 74 first spring, 101 steel drum body, 102 closing cap, 103 fastening bolt, 104 neck, 511 hook.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

Currently, in some radioactive waste treatment processes, a radioactive waste transfer device is required to receive radioactive waste at a waste receiving factory and store the radioactive waste in a steel drum, and then transfer the steel drum to a waste treatment center for subsequent treatment. The radioactive waste transferring device generally comprises a radioactive waste shielding container system, a transport vehicle, a vehicle-mounted crane and other devices, and the specific structure is shown in fig. 1.

In this process, the radioactive waste-shielding container in the system requires that the lid of the steel drum be opened before receiving the radioactive waste and closed after receiving the radioactive waste. In the process of the traditional equipment, a person is required to operate the crane equipment in a short distance in an orange zone (a region with high radioactive measurement) to finish a series of operations such as lifting, aligning and fixing of the sealing cover, and the like, so that the harm to the operator is great. According to the sealing cover opening and closing device for the radioactive waste shielding steel drum, automatic cover opening and closing can be realized through a site control cabinet or a remote site, the number of devices and the manual operation amount are greatly reduced, the safety and the health of operators are ensured, and radioactive substances can be effectively prevented from leaking to the environment.

Specifically, referring to fig. 1, the lid opening and closing device provided in this embodiment includes a base plate 10, a shielding container 20, and a cover 30; the base plate 10 provides a foundation for the installation of the rest of the structure of the device, and the shielding container 20 is fixedly installed on the upper plane of the base plate 10; the shielding container 20 here is configured for placement of a steel drum; cover 30 is movably mounted to base plate 10 by a sliding assembly.

The sliding assembly comprises a driving motor 11 and a sliding rail 12, the sliding rail 12 is arranged along the length direction of the bottom plate 10, the cover 30 is connected to the sliding rail 12 through a sliding seat, and the cover 30 can move back and forth under the driving action of the driving motor 11. For ease of description we define that the cover 30 can be moved back and forth between the waiting and operating positions under the influence of the drive motor 11.

The top of the cover 30 is additionally provided with a bracket 31, and a lifting component and a sealing cover grabbing component fixed in the lifting component are arranged in the bracket 31; while a bolt torque assembly is mounted in the cover 30.

The working principle of the scheme is as follows: the steel drum (here, an empty drum, see fig. 2, the concrete composition comprising a steel drum body 101 and a cover 102, the cover 102 being fixed to the steel drum body 101 by eight sets of fastening bolts 103, while the cover 102 also has a neck 104) is hoisted into the shielding container 20 by means of a crane; after the cover 30 automatically moves to the position right above the shielding container 20 (namely, moves from the waiting position to the working position) under the action of the driving motor 11, an operator firstly screws the fastening bolt on the sealing cover through the bolt torsion assembly, so that the sealing cover and the steel drum body are loosened; then, an operator uses the closure grabbing component to grab the neck of the closure; finally, the lifting assembly is controlled to automatically move upwards, so that the sealing cover grabbing assembly and the sealing cover can be lifted at the same time, and the sealing cover is separated from the steel drum body; the cover at this point will remain in the cover 30 here, with the cover 30 moving with it to the waiting position.

When the steel drum is filled with radioactive waste, the driving motor 11 actively drives the cover 30 from the waiting position to the working position, and then the lifting assembly drives the cover to downwards seal the opening of the steel drum body, so that the radioactive waste is prevented from leaking; and finally, an operator sequentially operates the sealing cover grabbing assembly and the bolt torsion assembly to seal and fasten the sealing cover and the steel drum body.

For a thorough understanding, the following describes in detail the specific composition of the lifting assembly, the closure grasping assembly, and the bolt torque assembly:

in a specific embodiment of the present solution, referring to fig. 3, the lifting assembly includes a driving source 41, a bushing nut 42, a lifting shaft 43, and a base plate 44; wherein the sleeve nut 42 is rotatably embedded in the bracket 31; the outer surface of the lifting shaft 43 is carved with external threads, and the lifting shaft 43 is in spiral connection with the sleeve nut 42; the base plate 44 is fixed to the bottom of the lift shaft 43, and the above-mentioned cap grasping assembly is fixed to the lower bottom surface of the base plate 44.

The lifting assembly has the main effect of lifting the sealing cover upwards to separate from the steel drum body or downwards to be attached to the steel drum body. Specifically, the driving source 41 provided in this scheme is a motor, the motor is fixed on the bracket 31, a pinion 45 is fixed at the output end of the motor, and meanwhile, a large gear 46 is sleeved on the outer surface of the sleeve nut 42, and the large gear and the small gear are meshed; as long as the driving source 41 (i.e., the motor) is started, the shaft sleeve nut 42 can be driven to rotate through the gear transmission, and because the shaft sleeve nut 42 is in spiral connection with the lifting shaft 43, the lifting shaft 43 moves up and down in a straight line under the rotation of the shaft sleeve nut 42; of course, the substrate 44 fixed to the lift shaft 43 will also move up and down synchronously.

Through fixed support 31 on cover 30 for there is partial space region between support 31 and the cover 30, sets up the transmission connection of gear wheel and pinion in this partial space region, and then has guaranteed the rationality of transmission structural design effectively.

Further designs are made here in order to ensure that the lifting shaft 43 only performs a straight up and down movement without rotating the base plate 44 during the movement. Specifically, the lifting assembly further includes a guide sleeve 47, the guide sleeve 47 being embedded in the cover 30; a vertical guide groove is also provided at the inner surface of the guide sleeve 47; at the same time, a guide is fixed to the lower portion of the lift shaft 43, and is housed in a guide groove and movable up and down along the guide groove. With the guiding of the guide by the guide groove, the lifting shaft 43 can be moved only in the vertical direction. That is, when the sleeve nut 42 rotates, the lift shaft 43 can move only in the axial direction of itself by the engagement of the guide and the guide groove, and does not rotate about the axis of itself.

The cover grabbing component is fixed on the lower end face of the base plate 44, so that the lifting shaft 43 moves up and down and drives the whole cover grabbing component to follow up, and particularly after the cover grabbing component grabs the cover of the steel drum, the cover and the steel drum body can be separated by the lifting component.

In a specific embodiment of the present solution, referring to fig. 5-6, the capping gripping assembly includes at least two gripper blocks 51, where the gripper blocks 51 are distributed in an equiangular array with the center of the substrate 44 as the center; all the gripper blocks 51 are slidably mounted on the lower surface of the base plate 44, and all the gripper blocks 51 are arranged in a linkage manner; each gripper slide 51 has a hook 511.

The linkage arrangement means that all the gripper blocks 51 can act simultaneously, specifically, when all the gripper blocks 51 move in a linkage manner, the hook portions 511 are close to or far away from each other, and the hook portions 511 are close to each other, so that the neck portion of the sealing cover can be clamped; the hooks 511 are moved away from each other to release the neck of the closure.

Optionally, four gripper blocks 51 are designed in total in the embodiment; four gripper blocks 51 are distributed in an annular array, and every two gripper blocks 51 form an angle of 90 degrees. Through the overall arrangement of adopting above structure, can form the omnidirectional cover in the neck position of closing cap, guarantee the stability of snatching the process.

In the scheme, the linkage between the gripper slide blocks 51 is realized through a turntable 52 and a link mechanism 53; specifically, the closure gripping assembly further includes a turntable 52 and a plurality of linkages 53; wherein the link mechanisms 53 are in one-to-one correspondence with the gripper blocks 51, and the gripper blocks 51 are movably connected with the turntable 52 through the link mechanisms 53; the rotation of the turntable 52 drives all the gripper blocks 51 to be linked at the same time.

Specifically, the link mechanism 53 includes a switching link, a first gripper bar protruding from one end of the gripper slider 51 facing the turntable 52 is provided, a corresponding second gripper bar is provided on the turntable 52, and two ends of the switching link are hinged to the first gripper bar and the second gripper bar through pins, respectively.

It can be simply understood that the cover grabbing component is of a crank block structure, referring to fig. 6-7, through rotation of the turntable 52, linkage of all the gripper blocks 51 is achieved, and the hook portion 511 on the gripper blocks 51 is utilized to clamp or unclamp the cover, so that the cover grabbing component has good positioning precision and aligning capability when grabbing the cover.

In this embodiment, the rotation of the turntable 52 is accomplished by a hand wheel assembly; specifically, the handwheel assembly includes a rotation shaft 61 and a handwheel plate 62; the hand wheel plate 62 is fixed on the top of the rotating shaft 61; the turntable 52 is fixed to the bottom of the rotation shaft 61; the roulette plate 62 rotates the dial 52 by driving the rotation shaft 61. Meanwhile, in the present embodiment, the rotation shaft 61 is provided coaxially with the above-mentioned lift shaft 43 and is built in the lift shaft 43; that is, in this scheme, through optimizing the structure, the lifting shaft 43 and the rotating shaft 61 are reasonably fused, so that the lifting shaft 43 can synchronously drive the rotating shaft 61 to move up and down in the up and down moving process, and the rationality of the whole structure is ensured.

In this embodiment, an upper bearing 63 and a lower bearing 64 are fixedly installed between the rotation shaft 61 and the lift shaft 43, and the rotation shaft 61 rotates relative to the lift shaft 43 through the upper bearing 63 and the lower bearing 64 and moves up and down along with the lift shaft 43.

Through the upper bearing 63 and the lower bearing 64, the effective rotation of the rotating shaft 61 can be ensured, and the rotation of the rotating shaft 61 can be completed through rotating the hand wheel disc 62, so that the aim of promoting the linkage of all the gripper sliding blocks 51 is fulfilled; meanwhile, the rotating shaft 61 also forms a limit of the vertical position by virtue of the upper bearing 63 and the lower bearing 64, so that the situation that the rotating shaft 61 and the lifting shaft 43 do not move relatively is ensured.

In a specific embodiment of the present solution, referring to fig. 8, the bolt torque assembly includes a torsion bar 71, the torsion bar 71 extending through the cover 30 and the base plate 44, the bottom of the torsion bar 71 extending downwardly until it protrudes out of the base plate 44; the fastening bolts 103 on the cover are screwed or loosened by the torsion bar 71 here.

Specifically, the bottom of the torsion bar 71 is provided as a hexagonal sleeve; the torsion bar 71 is sleeved in the hexagonal bolt of the sealing cover through a hexagonal sleeve, and the torsion bar 71 is rotated to screw and loosen the hexagonal bolt.

Optionally, the fastening bolt on the sealing cover is a specially processed outer hexagon bolt, and the top and the bottom of the fastening bolt are designed into cone structures. When the torsion bar 71 is first put on and is in alignment with the fastening bolt, there may be a case where the positioning is inaccurate, and at this time, only the torsion bar bush needs to be slightly rotated to be adjusted, so that the putting on of the fastening bolt is ensured by such external rotation. In addition, after the torsion bar 71 is fitted over the fastening bolt, the upper end of the torsion bar 71 has a partial length to be exposed to the cover 30, and the length of the exposed portion is set to be substantially constant. In such a manner, in an environment where the inside of the shielded container 20 cannot be observed, it is possible to judge whether the fastening bolt has been put on or not by judging the length of the exposed portion.

In this embodiment, the bolt torque assembly further includes an upper sleeve 72 and a lower sleeve 73; the upper shaft sleeve 72 is embedded and fixed in the cover 30, and the lower shaft sleeve 73 is embedded and fixed in the base plate 44; the torsion bar 71 is rotatably connected to the cover 30 via an upper sleeve 72 and a lower sleeve 73, thereby screwing the fastening bolt.

Alternatively, the torsion bar 71 mentioned is a stepped shaft, specifically including a first shaft, a second shaft, and a third shaft, which gradually increase in diameter; the first shaft is sleeved in the upper shaft sleeve 72; the third shaft is sleeved in the lower shaft sleeve 73; in the up-and-down movement process of the torsion bar 71, a first step formed by the first shaft lever and the second shaft lever is an upper limit position when being bonded with the upper shaft sleeve 72; the second step formed by the second shaft rod and the third shaft rod is lower limit when being attached to the lower shaft sleeve 73.

That is, by structurally designing the torsion bar 71, the torsion bar 71 can have a certain movable adjustment space in the vertical direction, so that the torsion bar 71 can be effectively and movably adjusted, and the torsion bar 71 and the fastening bolt can be effectively sleeved.

In this embodiment, the bolt torque assembly further includes a first spring 74, the first spring 74 is sleeved on the torsion bar 71, and the first spring 74 is located between the upper shaft sleeve 72 and the secondary step.

The design of the first spring 74 enables the bottom of the torsion bar 71 to be tightly attached to the steel drum cover during the whole process of descending and grabbing the cover or lifting the cover, so that the falling of the steel drum fastening bolt can be avoided during the process of lifting the cover by the device. Meanwhile, the torsion bar 71 is manually screwed by an operator through a wrench, and the closing state of the closing cover and the steel drum body needs to be ensured before screwing, so that the radiation dose received by the operator during operation can be ensured to be safe; meanwhile, the torsion bar 71 is designed into a stepped shaft type structure, so that radiation in the shielding container 20 can be prevented from directly overflowing through the holes of the torsion bar 71.

In a specific embodiment of the present solution, referring to fig. 9, the shielding container 20 described includes a body 21, in which a receiving cavity is formed in the body 21, the receiving cavity being configured to house a steel drum. Meanwhile, a plurality of guide strips 22 are fixed at the notch of the accommodating cavity, guide holes are formed in the upper end of each guide strip 22, and the guide holes correspond to the fastening bolts on the sealing cover in position; so that when the steel drum is placed in the receiving chamber, a portion of the shank of the fastening bolt is positioned exactly in the guide hole. By such guiding, it is possible to further ensure that the positions of the fastening bolts and the torsion bar 71 can be corresponded, and in actual operation, the socket joint with the fastening bolts can be completed only by simply rotating the torsion bar 71.

In the scheme, the bottom of the accommodating cavity is also provided with a push rod 23, a second spring is sleeved on the push rod 23, and the push rod 23 is elastically connected with the shielding container 20 through the second spring; the upper end part and the lower end part of the ejector rod 23 penetrate out of the shielding container; meanwhile, the lower end part of the ejector rod 23 is of a conical structure, and a proximity switch 24 is arranged on the outer surface of the shielding container 20; after the accommodating cavity of the steel drum is completely in place, the steel drum presses the ejector rod 23 downwards through self gravity and enables the second spring to be compressed, and the lower end part of the ejector rod 23 moves downwards to be close to the proximity switch 24 so as to trigger the proximity switch 24.

Because the environment within the shielded container 20 is highly radioactive, it should be avoided to mount the electronics directly within the shielded container 20, preferably with all electronics or devices disposed outside the shielded container 20, driven by mechanical structure; the proximity switch 24 is thus disposed outside the shielded container 20, effectively extending its useful life.

All procedures for using the device are summarized here:

in a specific embodiment of the present solution, the functions of the provided device may be specifically divided into an open cover and a closed cover, and these two functional steps are briefly described below.

And (3) uncapping:

(1) The steel drum with the cover 102 is hoisted into the receiving cavity of the shielding container 20 by the crane, and the guide bar 22 in the shielding container 20 can make the fastening bolt 103 on the steel drum at a predetermined position corresponding to the torsion bar 71 assembly.

(2) The drive motor is started to drive the cover 30 to move to the working position.

(3) The operator unscrews the fastening bolt 103 on the closure 102 via the torsion bar 71 and grips the neck 104 of the closure by rotating the hand wheel 62 to drive the gripper slide 51.

(4) The lifting assembly causes the lifting shaft to lift the closure upwardly, receiving the closure into the lid 30 and the steel drum opened.

(5) The driving motor 11 drives the cover 30 again to return to the waiting position.

(6) The radioactive waste is injected into the opened steel drum.

Closing the cover:

(1) After filling the empty drum with a sufficient amount of radioactive waste, the motor 11 is driven to drive the cover 30 to the working position again.

(2) The lifting assembly starts an automatic operation such that the cover 102 descends to cover the steel drum body 101 and releases the gripper blocks 51.

(3) The operator then operates the hand wheel assembly to tighten the closure cap to the steel can body 101 by rotating the torsion bar 71 to tighten the fastening bolts 103 on the closure cap.

The cover opening and closing device provided by the scheme can realize automatic cover opening and cover closing of the steel drum in the shielding container through the field control cabinet or the remote control, so that manual operation is greatly reduced, safety and health of operators are ensured, and the risk of leakage of radioactive substances to the environment is effectively reduced.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims (13)

1. A lid opening and closing device based on radioactive waste steel drum, characterized by comprising

A bottom plate (10);

a shielding container (20) fixedly installed on the upper plane of the base plate (10); the shielding container (20) is configured for placement of a steel drum;

a cover (30) movably mounted on the base plate (10) by a sliding assembly; a bracket (31) is additionally arranged at the top of the cover (30), and a lifting assembly and a sealing cover grabbing assembly fixed in the lifting assembly are arranged in the bracket (31); a bolt torsion assembly is arranged in the cover (30);

after the cover (30) moves to the position right above the shielding container (20), the bolt torsion assembly is configured to firstly screw a fastening bolt (103) on the sealing cover (102), then the sealing cover grabbing assembly is configured to grab a neck (104) of the sealing cover, and finally the lifting assembly moves upwards to lift the sealing cover grabbing assembly and the sealing cover at the same time, so that the sealing cover and the steel drum body (101) are separated.

2. The lid opening and closing device based on a radioactive waste steel drum according to claim 1, wherein the lifting assembly comprises a driving source (41), a sleeve nut (42), a lifting shaft (43) and a base plate (44);

the shaft sleeve nut (42) is rotatably embedded in the bracket (31); an external thread is carved on the outer surface of the lifting shaft (43), and the lifting shaft (43) is in spiral connection with the shaft sleeve nut (42); the base plate (44) is fixed at the bottom of the lifting shaft (43), and the cover grabbing component is fixed at the lower bottom surface of the base plate (44);

the driving source (41) drives the shaft sleeve nut (42) to rotate, and the lifting shaft (43) and the base plate (44) are moved up and down in a spiral transmission mode.

3. A lid opening and closing device based on a radioactive waste steel drum according to claim 2, characterized in that said lifting assembly further comprises a guide bush (47), said guide bush (47) being embedded in said cover (30); the inner surface of the guide shaft sleeve (47) is also provided with a vertical guide groove;

a guide member is fixed at the lower section of the lifting shaft (43), and the guide member is arranged in the guide groove and can move up and down along the guide groove; when the sleeve nut (42) rotates, the lifting shaft (43) only moves axially under the cooperation of the guide piece and the guide groove and does not rotate around the axis.

4. The lid opening and closing device based on radioactive waste steel drum according to claim 2, characterized in that said lid gripping assembly comprises at least two gripper blocks (51), said gripper blocks (51) being equiangularly arrayed around the center of said base plate (44); all the gripper sliding blocks (51) are slidably arranged on the lower surface of the base plate (44), and all the gripper sliding blocks (51) are arranged in a linkage manner; each gripper slide (51) has a hook (511);

all the gripper sliding blocks (51) move in a linkage mode to enable the hook parts to be close to or far away from each other, and further clamping or loosening of the neck of the sealing cover is achieved.

5. The lid opening and closing device based on radioactive waste steel drum according to claim 4, wherein the lid gripping assembly further comprises a turntable (52) and a plurality of link mechanisms (53);

the connecting rod mechanisms (53) are in one-to-one correspondence with the gripper sliding blocks (51), and the gripper sliding blocks (51) are movably connected with the rotary table (52) through the connecting rod mechanisms (53);

the rotation of the turntable (52) drives all the gripper blocks (51) to be linked.

6. The lid opening and closing device based on a radioactive waste steel drum according to claim 5, further comprising a hand wheel assembly including a rotation shaft (61) and a hand wheel disc (62); the hand wheel disc (62) is fixed on the top of the rotating shaft (61); the turntable (52) is fixed at the bottom of the rotating shaft (61); the hand wheel disc (62) drives the rotary disc (52) to rotate through a rotary shaft (61);

the rotation shaft (61) is provided coaxially with the lift shaft (43) and is built in the lift shaft (43); an upper bearing and a lower bearing are fixedly arranged between the rotating shaft (61) and the lifting shaft (43), and the rotating shaft (61) rotates relative to the lifting shaft (43) through the upper bearing (63) and the lower bearing (64) and simultaneously moves up and down along with the lifting shaft (43).

7. A lid opening and closing device based on a radioactive waste steel drum according to any one of claims 2 to 6, characterized in that said bolt torsion assembly comprises a torsion bar (71), said torsion bar (71) penetrating said cover (30) and said base plate (44), the bottom of said torsion bar (71) protruding from said base plate (44); the bottom of the torsion bar (71) is provided as a hexagonal sleeve; the torsion bar (71) is sleeved in a hexagonal bolt (103) of the sealing cover through the hexagonal sleeve, and the torsion bar (71) is rotated to screw and loosen the hexagonal bolt.

8. The lid opening and closing device based on a radioactive waste steel drum according to claim 7, wherein the bolt torque assembly further comprises an upper bushing (72) and a lower bushing (73); the upper shaft sleeve (72) is embedded and fixed in the cover (30), and the lower shaft sleeve (73) is embedded and fixed in the base plate (44);

the torsion bar (71) is connected with the cover (30) in a relative rotation way through the upper shaft sleeve (72) and the lower shaft sleeve (73).

9. The lid opening and closing device based on a radioactive waste steel drum according to claim 8, characterized in that said torsion bar (71) is a stepped shaft, in particular comprising a first shaft, a second shaft and a third shaft with gradually increasing diameters; the first shaft lever is sleeved in the upper shaft sleeve (72); the third shaft rod is sleeved in the lower shaft sleeve (73);

in the up-and-down movement process of the torsion bar (71), a first step formed by the first shaft lever and the second shaft lever is an upper limit position when the first step is attached to the upper shaft sleeve (72); the second-stage steps formed by the second shaft rod and the third shaft rod are lower limit when being attached to the lower shaft sleeve (73).

10. The lid opening and closing device based on a radioactive waste steel drum according to claim 9, wherein the bolt torsion assembly further comprises a first spring (74), the first spring (74) is sleeved on the torsion bar (71), and the first spring (74) is located between the upper shaft sleeve (72) and the secondary step.

11. The lid opening and closing device based on radioactive waste steel drum according to claim 1, characterized in that said shielding container (20) comprises a body (21), said body (21) having a housing cavity formed therein, said housing cavity being configured to house said steel drum.

12. The lid opening and closing device based on the radioactive waste steel drum according to claim 11, characterized in that a plurality of guide bars (22) are also fixed at the notch of the accommodating cavity, and the upper end of each guide bar (22) is provided with a guide hole, and the guide holes correspond to the fastening bolt positions on the lid; a portion of the shank of the fastening bolt is positioned within the guide bore when the steel drum is placed within the receiving cavity.

13. The lid opening and closing device based on the radioactive waste steel drum according to claim 12, characterized in that the bottom of the containing cavity is further provided with a push rod (23), the push rod (23) is elastically connected with the shielding container (20) through a second spring; the upper end part and the lower end part of the ejector rod (23) penetrate out of the shielding container (20);

the lower end part of the ejector rod (23) is of a conical structure, and a proximity switch (24) is arranged on the outer surface of the shielding container (20); after the accommodating cavity of the steel drum is completely in place, the steel drum presses down the ejector rod (23) through self gravity and enables the second spring to be compressed, and the lower end portion of the ejector rod (23) moves downwards to be close to the proximity switch (24) so as to trigger the proximity switch (24).

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