A double-cover sealed transfer device for radioactive materials

Abstract

The present invention relates to a double-cover sealed transfer device for radioactive materials, which includes a cylinder body, a rotating lock seat, a wall flange and an inner cover. The wall flange is fixedly arranged at the bottom of the sealed chamber. An umbrella-shaped mechanism is arranged at the bottom of the inner cover. The umbrella-shaped mechanism is locked by expanding outwards and embedding into a groove arranged on the circumference of the cylinder cover. The rotating lock seat is fixedly connected to the bottom of the wall flange by threads. During the transfer process of large-volume radioactive materials, when the transfer container is sealed and locked on the sealed chamber, the present invention simultaneously realizes the sealed connection between the inner cover and the cylinder cover, thereby ensuring the continuous sealing of the sealed chamber during the transfer process of the materials and preventing mutual contamination between the two covers.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear chemical engineering, and specifically relates to a double-cover sealed transfer device for radioactive materials. Background Art

[0002] In the field of nuclear chemical engineering, it is often necessary to transfer radioactive materials between hot cells and hot cells or other sealed chambers. A sealed chamber is a sealed box with a medium- and low-level radioactive environment, where relevant process operations are carried out inside, such as a glove box. A hot cell is a sealed place with shielding, sealing, and ventilation for performing high-radiation experiments and operations. The inner wall is generally covered with stainless steel, and the outer wall is made of concrete structure.

[0003] The above transfer process requires the use of radioactive material transfer equipment. At present, there are mainly two solutions for material transfer in sealed chambers under irradiation environments at home and abroad:

[0004] (1) Double-cover sealed transfer container

[0005] The double-cover sealed transfer container is a radioactive material transfer equipment with relatively mature technology at present. The double-cover container is a sealed container with double door covers, which can be used to transfer radioactive materials or radiation-contaminated waste between sealed chambers. The maximum diameter size of such a container is φ350, and the capacity is 50L, and it can only transfer materials with medium and small volumes. And the connection method with the flange is rotary locking, and the operation method is manual. If the weight of the material is large, there will be a leakage risk during the rotary locking process. In the transfer operation of the existing small double-cover container, the material needs to be transferred in batches multiple times. This transfer method has low efficiency, increases the labor intensity of operators, increases the risk of misoperation, and there are certain safety hazards.

[0006] (2) Sealed bag and adapter plate transfer

[0007] Since the double-cover container can only transfer materials with medium and small volumes or medium and small weights, for the transfer of large-volume and large-mass materials with an effective diameter of more than φ500 (or φ700) and an effective volume of more than 200L (the effective loading of φ700 diameter reaches 400L), the traditional bag-sealing and adapter plate transfer mode is still used at present. The sealed bag and adapter plate is a formed metal flange with a ring groove fixed on the sealed chamber by means of threads or welding. A sealed bag or other flexible parts with a terminal flanging can be directly installed on it, and a snap ring with the same diameter can also be installed at the flanging. The diameter of the sealed bag and adapter plate can generally be made to 400mm in diameter, and is used to transfer large-sized objects.

[0008] Although the sealed bag transfer solves the transfer of large - volume materials, due to the large - volume and large - mass materials being relatively bulky, this transfer method requires manual operation during the operation process. The labor intensity of the operator is relatively large. Frequent transfer significantly increases the fatigue level of the operator and also significantly increases the probability of misoperation. At the same time, there is also a relatively high leakage risk during the sealed bag receiving tray transfer process, posing a threat to the safety of the operators. Therefore, the bag - sealing mode is not only inefficient but also has a relatively high leakage risk. Summary of the Invention

[0009] The purpose of the present invention is to provide a double - lid sealed transfer device for radioactive materials. On the premise of not destroying the environmental atmosphere between chambers, ensuring sealing and not causing cross - contamination, it can safely transfer the in - and - out of large - volume and large - mass radioactive materials, improve the material transfer efficiency, the transfer process is fully sealed throughout, eliminating the leakage risk, and the opening, closing and locking of the inner lid located inside the chamber can all be electrically controlled, reducing the labor intensity of the operators.

[0010] To achieve the above - mentioned purpose, the present invention provides the following technical solutions:

[0011] The double - lid sealed transfer device for radioactive materials includes a cylinder body, a rotating lock seat, a wall flange and an inner lid. The wall flange is fixedly arranged at the bottom of the sealed chamber. The rotating lock seat is fixedly connected to the bottom of the wall flange through threads. A cylinder cover is arranged at the mouth of the cylinder body, and a cylinder sealing ring for sealing is arranged between the cylinder body and the cylinder cover; the cylinder sealing ring is also provided with a flanging and a groove. A boss is arranged at the bottom of the wall flange. The flanging of the cylinder sealing ring and the boss of the wall flange form a sealed connection through pressure; protrusions and grooves are arranged on the circumference of the cylinder cover; the circumferential protrusions of the cylinder cover are embedded in the grooves of the cylinder sealing ring to form a sealed connection.

[0012] A handle is arranged outside the rotating lock seat, a pin seat is arranged inside, a retractable locking pin is arranged in the pin seat, and the pin seat is also connected with a locking - pin guide plate for controlling the expansion and contraction of the locking pin; by rotating the handle, the pin seat slides along the direction of the locking - pin guide plate, thereby controlling the expansion and contraction of the locking pin; a step is arranged on the outer edge of the mouth of the cylinder body, and the cylinder body is fixed by the protrusion of the locking pin catching under the step of the cylinder body.

[0013] Lip - shaped sealing rings are arranged at the joints of the outer edge of the cylinder cover, the inner - hole surface of the wall flange and the outer edge of the inner lid; the cylinder cover, the wall flange and the inner lid form a sealed connection by compressing the lip - shaped sealing rings.

[0014] An umbrella - shaped mechanism is arranged at the bottom of the inner lid. The umbrella - shaped mechanism is locked by expanding outwards and then embedding into the groove arranged on the circumference of the cylinder cover, and is unlocked by retracting from the groove arranged on the circumference of the cylinder cover.

[0015] An opening - cover rotating shaft is also movably connected between the wall flange and the inner lid, and the inner lid opens and closes along the opening - cover rotating shaft.

[0016] A locking ring is movably arranged on the surface of the wall flange along the flange holes, and an inner cover guide seat is fixedly arranged; an arc-shaped rising angle inclined groove is formed on the locking ring corresponding to the inner cover guide seat; an inner cover bearing seat is fixedly arranged on the outer edge of the inner cover; the bearing arranged on the inner cover bearing seat is simultaneously embedded in the inner cover guide seat and the arc-shaped rising angle inclined groove formed on the locking ring; by rotating the locking ring along the circumference of the wall flange, the bearing in the arc-shaped rising angle inclined groove is pushed to move along the arc, and at the same time, the bearing moves up and down in the inner cover guide seat, thereby driving the inner cover to move up and down.

[0017] In the above-mentioned double-cover sealed transfer device for radioactive materials, a tapered hole is arranged at the butt joint of the inner hole of the wall flange, and the inner surface of the tapered hole is a tapered hole surface.

[0018] In the above-mentioned double-cover sealed transfer device for radioactive materials, an interlocking mechanism is further included, and the interlocking mechanism includes a rotating seat interlocking component and a cylinder cover interlocking component.

[0019] In the above-mentioned double-cover sealed transfer device for radioactive materials, the rotating seat interlocking component includes a locking ring lock tongue, a spring lock pin and a positioning hole corresponding to it on the rotating lock seat; the locking ring lock tongue is fixedly arranged on the outer wall of the locking ring, and the spring lock pin is arranged through the wall flange; by rotating the locking ring lock tongue along with the locking ring, the spring lock pin is pressed down and inserted into the positioning hole on the rotating lock seat to form a locked state; by rotating the locking ring lock tongue along with the locking ring, the spring lock pin is released from being pressed down and pops out of the positioning hole on the rotating lock seat to form an unlocked state.

[0020] In the above-mentioned double-cover sealed transfer device for radioactive materials, the cylinder cover interlocking component includes an interlocking mechanism, the interlocking mechanism is provided with a pin rod and a lock tongue, and a clamping groove is arranged on the locking ring; the interlocking mechanism is vertically arranged on the top of the inner cover, and the pin rod and the lock tongue of the interlocking mechanism are vertically and fixedly connected; when the cylinder cover is locked with the inner cover through the opening of the umbrella-shaped mechanism, the pin rod and the lock tongue of the interlocking mechanism are pushed out of the clamping groove on the locking ring at the same time, and the locking ring can rotate; when the cylinder cover is separated from the inner cover through the retraction of the umbrella-shaped mechanism, at the same time, the pin rod and the lock tongue of the interlocking mechanism fall and catch the clamping groove on the locking ring, and the locking ring is locked and cannot rotate.

[0021] In the above-mentioned double-cover sealed transfer device for radioactive materials, an umbrella-shaped mechanism is arranged at the bottom of the inner cover, and an electric push rod for controlling the opening and retraction actions of the umbrella-shaped mechanism is arranged on the top of the inner cover, and the electric push rod controls the opening and retraction of the umbrella-shaped mechanism through the expansion and contraction of the push rod.

[0022] In the above-mentioned double-cover sealed transfer device for radioactive materials, an electric push rod is fixedly arranged on the upper surface of the wall flange, the electric push rod includes a locking electric push rod and an opening cover electric push rod, the top end of the push rod of the locking electric push rod is connected to the locking ring, and the locking ring is rotated by the expansion and contraction of the locking electric push rod; the top end of the push rod of the opening cover electric push rod is connected to the rotating end of the opening cover rotating shaft, and the other end of the opening cover rotating shaft is connected to the inner cover, and the opening and closing of the inner cover are controlled by pushing the opening cover rotating shaft through the opening cover electric push rod.

[0023] The beneficial effects of the present invention are:

[0024] 1. The present invention no longer uses the docking, locking and rotating method of other double-cover products in terms of design structure, but adopts direct docking to reduce the risk of leakage. The use of automatic control mode can replace the manual opening, locking and closing of double covers, greatly reducing the labor intensity of operators, and the operation process is simple and convenient, thus solving the problem of safe transportation of large-volume radioactive materials between hot chambers or other sealed chambers.

[0025] 2. During the transportation of large-volume radioactive materials, the present invention seals and locks the transport container on the sealed chamber, while simultaneously achieving a sealed connection between the inner cover and the cylinder cover, thereby ensuring that the sealed chamber is continuously sealed during the transportation of the materials and preventing the two covers from contaminating each other.

[0026] 3. The present invention has an interlocking mechanism to prevent misoperation, which is safe and reliable.

[0027] 4. The present invention uses a direct connection method to replace the rotation locking method of the traditional double-cover container, reducing the difficulty of operation and the risk of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structural principle of the present invention;

[0029] Figure 2 This is a schematic diagram of the disassembled components of the structure of the present invention;

[0030] Figure 3 It is a schematic diagram of the closed structure principle of the present invention;

[0031] Figure 4 This is a schematic diagram of the opening structure principle of the present invention;

[0032] Figure 5 It is a schematic diagram of the cutaway structural principle of the present invention;

[0033] Figure 6 It is an enlarged schematic diagram of local A of the present invention.

[0034] In the figure: 1. Cylinder body; 1-1. Cylinder cover; 1-2. Cylinder sealing ring; 2. Rotating lock seat; 2-1. Pin seat; 2-2. Handle; 2-3. Lock pin; 2-4. Lock pin guide plate; 3. Wall flange; 3-1. Spring lock pin; 3-2. Locking ring lock tongue; 3-3. Inner cover guide seat; 3-4. Locking electric push rod; 3-5. Locking ring; 3-6. Opening cover electric push rod; 3-7. Opening cover shaft; 4. Inner cover; 4-1. Inner cover bearing seat; 4-2. Interlocking mechanism; 4-3. Umbrella mechanism; 4-4. Lip-shaped sealing ring; 4-5. Electric push rod. DETAILED DESCRIPTION

[0035] Reference Figures 1 to 6 , the double-cover sealed transfer device for radioactive materials involved in the present invention includes a cylinder body 1, a rotating lock seat 2, a wall flange 3 and an inner cover 4. The wall flange 3 is fixedly arranged at the bottom of the sealed chamber. The rotating lock seat 2 is fixedly connected to the bottom of the wall flange 3 by threads. A cylinder cover 1-1 is arranged at the mouth of the cylinder body 1, and a cylinder sealing ring 1-2 for sealing is arranged between the cylinder body 1 and the cylinder cover 1-1; the cylinder sealing ring 1-2 is also provided with a flanging and a groove. A boss is arranged at the bottom of the wall flange 3. The flanging of the cylinder sealing ring 1-2 and the boss of the wall flange 3 are hermetically connected by pressure; protrusions and grooves are arranged on the circumference of the cylinder cover 1-1; the circumference of the cylinder cover 1-1 is convexly embedded into the groove of the cylinder sealing ring 1-2 to form a sealed connection;

[0036] A handle 2-2 is arranged outside the rotating lock seat 2, and a pin seat 2-1 is arranged inside. A retractable lock pin 2-3 is arranged in the pin seat 2-1. The pin seat 2-1 is also connected with a lock pin guide plate 2-4 for controlling the retraction and extension of the lock pin 2-3; by rotating the handle 2-2, the pin seat 2-1 slides along the direction of the lock pin guide plate 2-4, so as to control the retraction and extension of the lock pin 2-3; a step is arranged on the outer edge of the mouth of the cylinder body 1, and the cylinder body 1 is fixed by the protrusion of the lock pin 2-3 under the step of the cylinder body 1;

[0037] A conical hole is arranged at the butt joint of the inner hole of the wall flange 3. The inner surface of the conical hole is a conical hole surface. A lip seal ring 4-4 is arranged at the joint of the outer edge of the cylinder cover 1-1, the conical hole surface of the wall flange 3 and the outer edge of the inner cover 4; the cylinder cover 1-1, the wall flange 3 and the inner cover 4 are hermetically connected by compressing the lip seal ring 4-4;

[0038] An umbrella mechanism 4-3 is arranged at the bottom of the inner cover 4. The umbrella mechanism 4-3 is locked by expanding outwards and embedding into the groove arranged on the circumference of the cylinder cover 1-1, and the umbrella mechanism 4-3 is unlocked by retracting from the groove arranged on the circumference of the cylinder cover 1-1;

[0039] An opening and closing rotating shaft 3-7 is also movably connected between the wall flange 3 and the inner cover 4. The inner cover 4 opens and closes along the opening and closing rotating shaft 3-7;

[0040] A locking ring 3-5 is movably arranged along the flange hole on the surface of the wall flange 3, and an inner cover guide seat 3-3 is fixedly arranged; an arc-shaped rising angle inclined groove is arranged on the locking ring 3-5 corresponding to the inner cover guide seat 3-3; an inner cover bearing seat 4-1 is fixedly arranged on the outer edge of the inner cover 4; the bearing arranged on the inner cover bearing seat 4-1 is simultaneously embedded into the inner cover guide seat 3-3 and the arc-shaped rising angle inclined groove arranged on the locking ring 3-5; by rotating the locking ring 3-5 along the wall flange 3, the bearing in the arc-shaped rising angle inclined groove is pushed to move along the arc, and at the same time, the bearing moves up and down in the inner cover guide seat 3-3, so as to drive the inner cover 4 to move up and down.

[0041] The present invention is also provided with an interlocking mechanism to prevent misoperation. The interlocking mechanism includes a rotating seat interlocking component and a cylinder cover interlocking component. The rotating seat interlocking component includes a locking ring locking tongue 3-2, a spring lock pin 3-1, and a positioning hole corresponding to the rotating lock seat 2; the locking ring locking tongue 3-2 is fixedly arranged on the outer wall of the locking ring 3-5, and the spring lock pin 3-1 is penetrated through the wall flange 3; when the locking ring locking tongue 3-2 rotates with the locking ring 3-5, the spring lock pin 3-1 is pressed down and inserted into the positioning hole on the rotating lock seat 2 to form a locked state; when the locking ring locking tongue 3-2 rotates with the locking ring 3-5, the spring lock pin 3-1 is released from being pressed down and pops out of the positioning hole on the rotating lock seat 2 to form an unlocked state. The cylinder cover interlocking component includes an interlocking mechanism 4-2, the interlocking mechanism 4-2 is provided with a pin rod and a locking tongue, and the locking ring 3-5 is provided with a card slot; the interlocking mechanism 4-2 is vertically arranged on the top of the inner cover 4, and the pin rod and the locking tongue of the interlocking mechanism 4-2 are vertically and fixedly connected; when the cylinder cover 1-1 is locked with the inner cover 4 through the opening of the umbrella-shaped mechanism 4-3, the pin rod and the locking tongue of the interlocking mechanism 4-2 are pushed out of the card slot on the locking ring 3-5, and the locking ring 3-5 can rotate; when the cylinder cover 1-1 is separated from the inner cover 4 through the retraction of the umbrella-shaped mechanism 4-3, at the same time, the pin rod and the locking tongue of the interlocking mechanism 4-2 fall and catch the card slot on the locking ring 3-5, and the locking ring 3-5 is locked and cannot rotate.

[0042] To meet the need for electrification, the present invention is also provided with an electric device. An umbrella-shaped mechanism 4-3 is arranged at the bottom of the inner cover 4, and an electric push rod 4-5 for controlling the opening and retraction actions of the umbrella-shaped mechanism 4-3 is arranged on the top of the inner cover 4. The electric push rod 4-5 controls the opening and retraction of the umbrella-shaped mechanism 4-3 through the telescopic movement of the push rod. An electric push rod is fixedly arranged on the upper surface of the wall flange 3. The electric push rod includes a locking electric push rod 3-4 and an opening electric push rod 3-6. The top end of the push rod of the locking electric push rod 3-4 is connected to the locking ring 3-5, and the locking ring 3-5 is pushed to rotate through the telescopic movement of the locking electric push rod 3-4; the top end of the push rod of the opening electric push rod 3-6 is connected to the rotating end of the opening rotating shaft 3-7, and the other end of the opening rotating shaft 3-7 is connected to the inner cover 4. The opening and closing of the inner cover 4 are controlled by pushing the opening rotating shaft 3-7 through the opening electric push rod 3-6.

[0043] Refer to Figures 1 to 4 Describe the process of transferring materials into the chamber. At the start and end of the transfer operation, both the container and the sealed chamber are in a sealed state.

[0044] The wall flange 3 is installed at the bottom of the hot chamber or other sealed chamber, and can be connected by welding or bolt connection according to the actual situation. Both the cylinder body 1 and the rotating lock seat 2 are outside the sealed chamber.

[0045] The rotating lock seat 2 and the wall flange 3 are connected to each other by bolts. The cylinder 1 loaded with radioactive materials, including the cylinder cover 1-1 and the cylinder sealing ring 1-2 installed on the cylinder 1, is moved together to the bottom of the wall flange 3, and is docked with the rotating lock seat 2 from the bottom of the sealed chamber through a lifting vehicle. The warped edge of the cylinder sealing ring 1-2 contacts the wall flange 3 and is flattened by the boss of the wall flange 3. At this time, the cylinder 1 and the wall flange 3 are connected and are in a sealed state.

[0046] At this time, the cylinder cover 1-1 lifts the pin of the interlocking structure 4-2 installed on the inner cover, so that the locking tongue of the interlocking structure 4-2 is disengaged from the slot of the locking ring 3-5, and the locking ring 3-5 is unlocked and can be rotated.

[0047] At this time, the handle 2-2 is turned clockwise to extend the lock pin 2-3 of the rotating lock seat 2, which is stuck at the step of the mouth of the cylinder 1 to lock the cylinder 1. The cylinder seal ring 1-2 is deformed to achieve mutual sealing.

[0048] The control electric push rod 4-5 is extended, and the umbrella-shaped structure 4-3 installed on the bottom of the inner cover is opened outward and inserted into the groove of the barrel cover 1-1. The inner cover 4 is connected with the barrel cover 1-1, and the double covers are connected at this time.

[0049] Control the two locking electric push rods 3-4 to extend. Two electric push rods are selected here to ensure sufficient torque. There is a conical hole surface at the joint of the inner hole of the wall flange 3. Through compression and deformation with the lip-shaped sealing ring 4-4 ​​on the inner cover 4, the two are in a sealed state. (Driven by the extension of the locking electric push rod 3-4) Turn the locking ring 3-5 counterclockwise, and the locking ring lock tongue 3-2 of the interlocking assembly installed on the locking ring 3-5 will rotate at the same time, pressing down the spring lock pin 3-1 installed on the wall flange 3. There is a positioning hole reserved on the rotating lock seat 2. When the handle 2-2 is rotated to the position of locking the cylinder, the positioning hole is just aligned with the spring lock pin 3-1, and the spring lock pin 3-1 pin rod is inserted into the positioning hole of the rotating lock seat 2, locking the cylinder 1 so that the handle 2-2 cannot rotate. The interlocking assembly here mainly prevents the misoperation of the rotating handle 2-2, so that the cylinder 1 is unloaded when the inner cover 4 is not closed normally, causing the cylinder 1 to detach from the wall flange 3, resulting in leakage.

[0050] At the same time, through the rotation of the locking ring 3-5, the inner cover bearing seat 4-1 slides upward in the inner cover guide seat 3-3, and the inner cover 4 moves upward along the arc-shaped rising angle groove of the locking ring 3-5. At the same time, the umbrella-shaped mechanism 4-3 drives the cylinder cover 1-1 to move upward, so that the cylinder cover 1-1 is separated from the groove of the cylinder sealing ring 1-2, and the locking state of the cylinder and the cylinder sealing ring 1-2 is released.

[0051] Control the opening electric push rod 3-6 to extend and lift the inner cover 4. Open the inner cover 4 and the barrel cover 1-1 simultaneously. The inside of the barrel body is connected to the inside of the sealed chamber, and use a manipulator to take out the radioactive material. At this time, the space between the barrel body and the sealed chamber is in a sealed state. The space between the inner cover 4 and the barrel cover 1-1 is also sealed.

[0052] During the entire transfer process, the space between the inner cover 4 and the barrel cover 1-1 is always in a sealed state.

[0053] The rotating seat interlock assembly makes the entire device non-rotatable when it is in the open state to prevent leakage caused by misoperation (the rotating seat interlock assembly includes a locking ring locking tongue 3-2, a spring lock pin 3-1 and the corresponding positioning holes on the rotating lock seat 2).

[0054] The barrel cover interlock assembly can detect whether the barrel cover 1-1 is properly assembled with the barrel body during docking installation to prevent misoperation without the barrel cover 1-1 (the barrel cover interlock assembly includes an interlock mechanism 4-2 and its pin rod, locking tongue, and the card slot of the locking ring 3-5).

[0055] The rotation and opening of the locking ring 3-5, the unfolding of the umbrella-shaped structure 4-3, and the opening of the inner cover are all electrically controlled (electric push rod), reducing the labor intensity of the operator.

[0056] Refer to Figure 5 and the cross-section Figure 6 to illustrate the transfer of radioactive material out of the sealed chamber.

[0057] From Figure 2 In this state, load the radioactive material into the barrel body, control the opening electric push rod 3-6 to retract, push the opening shaft 3-7, and the inner cover 4 together with the barrel cover 1-1 connected to it by a card slot fall together under the drive of the opening shaft 3-7.

[0058] Control the locking electric push rod 3-4 to retract, the locking ring 3-5 rotates clockwise and is installed on the inner cover 4 (by the clockwise rotation of the locking ring 3-5, the inner cover bearing seat 4-1 slides downward in the inner cover guide seat 3-3, and the inner cover 4 moves downward along the arc-shaped rising angle chute of the locking ring 3-5 at the same time); the lip seal 4-4 contacts the tapered hole surface of the wall flange 3-8 and forms a tightening pressure on the lip seal 4-4, causing the lip seal 4-4 to deform and form a seal with the wall flange 3-8.

[0059] While the locking ring 3-5 drives the inner cover 4 to move downward, the barrel cover 1-1 supported by the umbrella mechanism 4-3 also moves downward. The barrel cover 1-1 is subjected to a downward pressure, and the circumferential protrusion of the barrel cover 1-1 causes the barrel seal ring 1-2 to deform. The circumferential protrusion of the barrel cover 1-1 is embedded in the groove of the barrel seal ring 1-2, and the two are combined to complete and form a seal.

[0060] The locking ring tongue 3-2 of the rotating seat interlocking assembly rotates clockwise simultaneously with the locking ring 3-5, loosening the spring lock pin 3-1, and the pin rod of the spring lock pin 3-1 pops out from the positioning hole of the rotating lock seat 2, the rotating lock seat 2 is unlocked, and the handle 2-2 becomes rotatable.

[0061] The electric push rod 4-5 is controlled to retract the umbrella-shaped mechanism 4-3 and withdraw it from the groove of the barrel cover 1-1, thereby releasing the clamping state with the barrel cover 1-1, and the inner cover 4 is separated from the barrel cover 1-1.

[0062] The handle 2-2 is turned, and the lock pin 2-3 of the rotating lock seat 2 is retracted and no longer blocks the step at the mouth of the cylinder body. The rotating lock seat 2 is unlocked, and the cylinder body 1 is unloaded.

[0063] At this time, the lifting force of the cylinder cover 1-1 on the interlocking mechanism 4-2 disappears, the locking tongue of the interlocking mechanism 4-2 falls down, and is stuck in the slot of the locking ring 3-5, and the locking ring 3-8 is locked and cannot rotate. At this point, the material transfer operation is completed.

[0064] The entire operation process is sealed, safe and reliable, ensuring the safety of operators and the operating environment.

[0065] The operation process is simple and the learning cost is low. Remote operation and automated operation can be achieved through monitoring equipment.

[0066] The two interlocking mechanisms can completely eliminate misoperation, prevent the cylinder from being unloaded when the inner cover is not closed, and prevent the inner cover from being accidentally opened when there is no cylinder or the cylinder cover is not correctly installed.

[0067] The present invention has a larger caliber, and the effective diameter of the material passing through is φ500 (φ700 is optional), and the effective volume reaches 200L (φ700 diameter effective loading reaches 400L). In terms of design structure, it no longer adopts the docking, locking and rotating method of other double-cover products, but adopts direct docking to reduce the risk of leakage. The use of automatic control mode can replace the manual opening, locking and closing of double covers, etc., greatly reducing the labor intensity of operators, and the operation process is simple and convenient, thus solving the problem of safe transportation of large-volume radioactive materials between hot chambers or other sealed chambers.

[0068] The present invention is used to seal the entire process during transportation to avoid leakage and cross contamination. The present invention has an interlocking mechanism to prevent misoperation, which is safe and reliable. The present invention is automated and reduces the labor intensity of the operator. The present invention uses a direct connection method to replace the traditional double-cover container's rotation locking method, reducing the difficulty of operation and the risk of leakage.

[0069] The invention is easy to operate and does not require a rotating operation to lock the container. It can load and transport larger volumes of materials. The cylinder sealing ring has a simple structure and reduces manufacturing costs.

[0070] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A double-cover sealed transfer device for radioactive materials, comprising a cylinder body (1), a rotating lock seat (2), a wall flange (3) and an inner cover (4). The wall flange (3) is fixedly arranged at the bottom of the sealed chamber, and the rotating lock seat (2) is fixedly connected to the bottom of the wall flange (3) by threads. It is characterized in that, A cylinder cover (1-1) is provided at the mouth of the cylinder body (1), and a cylinder sealing ring (1-2) for sealing is provided between the cylinder body (1) and the cylinder cover (1-1); the cylinder sealing ring (1-2) is also provided with a flanging and a groove, a boss is provided at the bottom of the wall flange (3), and the flanging of the cylinder sealing ring (1-2) is hermetically connected with the boss of the wall flange (3) by pressure; protrusions and grooves are provided on the circumference of the cylinder cover (1-1); a sealing connection is formed by embedding the circumferential protrusions of the cylinder cover (1-1) into the grooves of the cylinder sealing ring (1-2). A handle (2-2) is provided outside the rotating lock seat (2), a pin seat (2-1) is provided inside, a retractable lock pin (2-3) is provided in the pin seat (2-1), and a lock pin guide plate (2-4) for controlling the expansion and contraction of the lock pin (2-3) is also connected to the pin seat (2-1); by rotating the handle (2-2), the pin seat (2-1) slides along the direction of the lock pin guide plate (2-4), thereby controlling the expansion and contraction of the lock pin (2-3); a step is provided on the outer edge of the mouth of the cylinder body (1), and the cylinder body (1) is fixed by the protrusion of the lock pin (2-3) being stuck under the step of the cylinder body (1). A lip seal ring (4-4) is provided at the joint of the outer edge of the cylinder cover (1-1), the inner hole surface of the wall flange (3), and the outer edge of the inner cover (4); the cylinder cover (1-1), the wall flange (3), and the inner cover (4) are hermetically connected by compressing the lip seal ring (4-4). An umbrella mechanism (4-3) is provided at the bottom of the inner cover (4), and the umbrella mechanism (4-3) is locked by expanding outwards and embedding into the groove provided on the circumference of the cylinder cover (1-1), and the umbrella mechanism (4-3) is unlocked by retracting from the groove provided on the circumference of the cylinder cover (1-1). An opening / closing rotating shaft (3-7) is also movably connected between the wall flange (3) and the inner cover (4), and the inner cover (4) opens and closes along the opening / closing rotating shaft (3-7). A locking ring (3-5) is movably provided on the surface of the wall flange (3) along the flange hole, and an inner cover guide seat (3-3) is fixedly provided; an arc-shaped rising angle inclined groove is provided on the locking ring (3-5) corresponding to the inner cover guide seat (3-3); an inner cover bearing seat (4-1) is fixedly provided on the outer edge of the inner cover (4); the bearings provided on the inner cover bearing seat (4-1) are simultaneously embedded into the arc-shaped rising angle inclined grooves provided on the inner cover guide seat (3-3) and the locking ring (3-5); by rotating the locking ring (3-5) along the circumference of the wall flange (3), the bearings in the arc-shaped rising angle inclined groove are pushed to move along the arc, and at the same time, the bearings move up and down in the inner cover guide seat (3-3), thereby driving the inner cover (4) to move up and down. A tapered hole is provided at the butt joint of the inner hole of the wall flange (3), and the inner surface of the tapered hole is a tapered hole surface. An electric push rod is fixedly arranged on the upper surface of the wall flange (3). The electric push rod includes a locking electric push rod (3-4) and an opening electric push rod (3-6). The top end of the push rod of the locking electric push rod (3-4) is connected to a locking ring (3-5), and the locking ring (3-5) is rotated by the telescopic movement of the locking electric push rod (3-4). The top end of the push rod of the opening electric push rod (3-6) is connected to the rotating end of an opening rotating shaft (3-7), and the other end of the opening rotating shaft (3-7) is connected to the inner cover (4). The opening and closing of the inner cover (4) are controlled by pushing the opening rotating shaft (3-7) by the opening electric push rod (3-6).

2. The double-cover sealed transfer device for radioactive materials according to claim 1, characterized in that, It also includes an interlocking mechanism, which includes a rotating seat interlocking component and a cylinder cover interlocking component.

3. The double-cover sealed transfer device for radioactive materials according to claim 2, characterized in that, The rotating seat interlocking component includes a locking ring lock tongue (3-2), a spring lock pin (3-1) and its corresponding positioning hole on the rotating lock seat (2). The locking ring lock tongue (3-2) is fixedly arranged on the outer wall of the locking ring (3-5), and the spring lock pin (3-1) is arranged through the wall flange (3). The spring lock pin (3-1) is pressed down and inserted into the positioning hole on the rotating lock seat (2) by the rotation of the locking ring lock tongue (3-2) along with the locking ring (3-5) to form a locked state. The spring lock pin (3-1) is released from being pressed down and ejected from the positioning hole on the rotating lock seat (2) by the rotation of the locking ring lock tongue (3-2) along with the locking ring (3-5) to form an unlocked state.

4. The double-cover sealed transfer device for radioactive materials according to claim 3, characterized in that, The cylinder cover interlocking component includes an interlocking mechanism (4-2). The interlocking mechanism (4-2) is provided with a pin rod and a lock tongue, and a clamping groove is arranged on the locking ring (3-5). The interlocking mechanism (4-2) is vertically arranged on the top of the inner cover (4), and the pin rod and the lock tongue of the interlocking mechanism (4-2) are vertically and fixedly connected. When the cylinder cover (1-1) is locked with the inner cover (4) by the opening of the umbrella mechanism (4-3), the pin rod and the lock tongue of the interlocking mechanism (4-2) are pushed out of the clamping groove on the locking ring (3-5), and the locking ring (3-5) can rotate. When the cylinder cover (1-1) is separated from the inner cover (4) by the retraction of the umbrella mechanism (4-3), the pin rod and the lock tongue of the interlocking mechanism (4-2) fall and block the clamping groove on the locking ring (3-5), and the locking ring (3-5) is locked and cannot rotate.

5. The double-cover sealed transfer device for radioactive materials according to claim 1, characterized in that, An umbrella mechanism (4-3) is arranged at the bottom of the inner cover (4), and an electric push rod (4-5) for controlling the opening and retraction of the umbrella mechanism (4-3) is arranged on the top of the inner cover (4). The opening and retraction of the umbrella mechanism (4-3) are controlled by the telescopic movement of the push rod of the electric push rod (4-5).

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