Double-station radioactive filter element transfer device and method

Abstract

The double-station radioactive filter element transfer device comprises a vehicle body, a winding device, a three-jaw automatic centering mechanism and a corrugated pipe sealing sleeve, a shielding case is installed on the vehicle body, and a shielding door is formed in the side face of the shielding case; the interior of the shielding cover and the vehicle body are divided into a first station and a second station, the first station and the second station both comprise round holes formed in the vehicle body, and cover plates are arranged on the round holes; a shielding cylinder is arranged at the position corresponding to the first station. The transferring method comprises the following steps that S1, the shielding cover plate and the shielding plug are hoisted; the new filter element is transferred to a station II; s2, grabbing an old filter element; and S3, replacing the old filter element with a new filter element. By adopting a double-station method, aerosol of the pit filter can be prevented from overflowing in the replacement process, the radioactive sealing containing boundary of the pit filter is guaranteed, the filter element can be rapidly replaced, the shielding cylinder is shielded by a lead layer, and it is guaranteed that the radiation level of personnel is controllable.

Description

Technical Field

[0001] This invention relates to the field of radioactive waste treatment technology, specifically to a dual-station radioactive filter cartridge transfer device and method. Background Technology

[0002] With the rapid development of industries such as nuclear energy utilization, radiotherapy, and radiation processing, the number of work scenarios in high-radiation environments is increasing. Currently, in spent fuel reprocessing radioactive facilities, the ventilation system uses a step-by-step filtration method of niche filters and pit filters to reduce the radioactivity level of the exhaust air. However, due to the high dose levels in some hot chambers, some dose still leaks into the pit filters after filtration by the niche filters, causing the dose in the pit filters to exceed the standard and resulting in a high background in the environmental field. Therefore, the monitoring equipment cannot accurately measure the surface dose rate of the filter elements, thus failing to effectively and accurately assess the surface dose of the filter elements.

[0003] In addition, pit filter cartridges are characterized by short replacement cycles and high dose levels during replacement. Statistics show that the shortest replacement cycle is one day, with a single replacement taking approximately 30 minutes, and the highest dose level during replacement is 10 mSv. Currently, the replacement of pit filter cartridges is done manually by on-site personnel, who must re-measure the surface dose rate before transporting the old cartridges. During transport, personnel are in close contact with the old cartridges, increasing the risk of secondary radiation exposure.

[0004] In summary, the entire filter replacement process is time-consuming and labor-intensive. Furthermore, the lack of effective shielding measures during replacement and transportation significantly increases the risk and level of radiation exposure for workers, and also easily leads to aerosol leakage during replacement. Therefore, there is an urgent need to develop an online filter dose detection and rapid replacement device suitable for high-dose environments. Summary of the Invention

[0005] The purpose of this invention is to provide a dual-station radioactive filter cartridge transfer device and method, suitable for online dose detection and rapid replacement of filter cartridges in high-radiation, high-dose environments. By combining online dose detection technology and automatic replacement technology, accurate dose detection and rapid filter cartridge replacement are achieved, while reducing the difficulty of filter cartridge replacement, improving replacement efficiency, and effectively reducing the radiation level of on-site personnel, ambient radiation dose, and aerosol spillage.

[0006] The technical solution of the present invention is as follows: A dual-station radioactive filter transfer device includes a vehicle body, a hoisting device, a three-jaw automatic centering mechanism, and a bellows sealing sleeve. A shielding cover is installed on the vehicle body, and a shielding door is opened on the side of the shielding cover. Inside the shielding cover, the vehicle body is divided into station one and station two. Station one and station two both include a circular hole opened on the vehicle body, and both have a cover plate on the circular hole. A shielding cylinder is located at the position corresponding to station one.

[0007] The shielding cylinder includes an outer shielding cylinder and an inner shielding cylinder. Both the outer and inner shielding cylinders are semi-circular rings, and the radius of the outer shielding cylinder is larger than that of the inner shielding cylinder. The inner side of the outer shielding cylinder matches the outer side of the inner shielding cylinder, and the outer and inner shielding cylinders move alternately, thereby opening or closing the shielding cylinder.

[0008] An AGV idler wheel is installed at the lower end of the vehicle body.

[0009] The three-jaw automatic centering mechanism includes an inflatable washer, which is a circular ring structure with a corrugated sealing sleeve installed on its inner side. The upper part of the corrugated sealing sleeve matches the circular hole of station one or station two. The inflatable washer is connected to a support lug, and a connecting rod is installed on the support lug. The upper end of the connecting rod is connected to a servo electric cylinder, and the connecting rod is located in the slide rail.

[0010] The servo electric cylinder is mounted on a track, which is located on the vehicle body and inside a shield.

[0011] The lower end of the inflatable washer is connected to three guide claws.

[0012] The top of the shield is equipped with a winch guide rail, and the winch is mounted on the winch guide rail and can move along the winch guide rail; the winch includes a robotic arm.

[0013] The shielding cylinder, corrugated pipe sealing sleeve, and shielding cover are all made of radiation shielding material.

[0014] A dual-station radioactive filter cartridge transfer method includes the following steps:

[0015] S1: Lift the shielding cover and shielding plug; and transfer the new filter element to station two;

[0016] S2: Grab the old filter cartridge:

[0017] S2.1: Align the round hole of station one of the vehicle body with the pit, open the cover, and move the three-jaw automatic centering mechanism and the bellows sealing sleeve to station one. Use the guide claw to hold the inner wall of the pit and inflate the air gasket.

[0018] S2.2: Open the cover of station one, open the shielding cylinder, move the hoist to station one and descend through the vehicle body into the pit, the hoist's robotic arm grabs the old filter element, after grabbing, the hoist returns to the shielding cylinder, closes the shielding cylinder, closes the cover of station one, the hoist's robotic arm opens, and places the old filter element in station one.

[0019] S3: Replace with a new filter;

[0020] S3.1: Open the shielding cylinder, and after the hoisting device moves to station two, close the shielding cylinder;

[0021] S3.2: The AGV idler wheel drives the vehicle body to move to the left, so that the round hole of station two is aligned with the pit. At this time, the servo electric cylinder slides on the slide rail, and the three-jaw automatic centering mechanism and the bellows sealing sleeve move to station two through the connecting rod, and the cover plate of station two is opened.

[0022] S3.3: After the winch device's robotic arm grabs the new filter element, it descends, exits the vehicle body, and transfers the new filter element to the pit 108. The winch device's robotic arm then releases, and the winch device rises back into the vehicle body.

[0023] S3.4: Close the cover of station two, deflate the air gasket, and separate the three-claw automatic centering mechanism from the pit.

[0024] In S3.2, the three-jaw automatic centering mechanism and the bellows sealing sleeve do not move relative to the pit.

[0025] The significant advantages of this invention are: by adopting a dual-station method, the aerosol overflow of the pit filter can be avoided during the replacement process, ensuring the radioactive sealing and containment boundary of the pit filter, and enabling rapid replacement of the filter element. In addition, the shielding cylinder uses lead layer shielding to ensure that the radiation level of personnel is controllable. Attached Figure Description

[0026] The accompanying drawings are provided to enhance understanding of the method and form part of the specification. They are used in conjunction with the implementation of the method to interpret this patent, but do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 Diagram of a sump filter

[0028] Figure 2 3D assembly drawing of dual-station filter cartridge transfer trolley

[0029] Figure 3 Three-jaw automatic centering mechanism

[0030] Figure 4 3D diagram of dual-station conversion unit

[0031] Figure 5 Mechanical limit section

[0032] Figure 6 3D diagram of the moving unit

[0033] Figure 7 Overall diagram of filter cartridge transfer unit

[0034] Figure 8 Shielding cover and shielding plug

[0035] Figure 9 Shielding cover and shielding plug

[0036] In the diagram: 1. Outer shielding cylinder; 2. Viewing window; 3. Inner shielding cylinder; 4. Winching device; 5. Shielding door; 6. AGV idler wheel; 7. Three-jaw automatic centering mechanism; 8. Corrugated pipe sealing sleeve; 9. Servo electric cylinder; 10. Vehicle body; 11. Shielding cover; 12. Winching device guide rail.

[0037] Workstation 1: 100; Workstation 2: 200;

[0038] Shielding cover 107, pit 108, shielding plug 109, ground 110;

[0039] 71. Inflatable washer, 72. Support lug, 73. Connecting rod, 74. Slide rail, 75. Guide claw. Detailed Implementation

[0040] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0041] The terminology used in one or more embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of one or more embodiments of this application. The singular forms “a,” “the,” and “the” used in one or more embodiments of this application and in the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” used in one or more embodiments of this application refers to and includes any or all possible combinations of one or more associated listed items.

[0042] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this application, and similarly, second may also be referred to as first.

[0043] The specific technical content of the present invention will now be described with reference to the accompanying drawings;

[0044] Example 1

[0045] like Figure 1 As shown, there is a pit 108 on the ground 110, and the radioactive filter element is located in the pit 108. The top of the pit 108 is sealed by a shielding cover plate 107 and a shielding plug 109. That is, through the dual-station radioactive filter element transfer device described in this invention, the used radioactive filter element with strong radioactivity is transferred from the pit 108 to the dual-station radioactive filter element transfer device, and it is ensured that there is no aerosol spillage during the transfer process, thereby reducing the radiation level of on-site personnel and the radiation dose of the surrounding area.

[0046] like Figure 2 As shown, a dual-station radioactive filter transfer device includes a vehicle body 10, a shielding cover 11 installed on the vehicle body 10, and a shielding door 5 opened on the side of the shielding cover 11.

[0047] like Figure 4 As shown, inside the shielding cover 11, the vehicle body 10 is divided into work station 100 and work station 200. Both work station 100 and work station 200 include round holes on the vehicle body 10, and both have cover plates on the round holes.

[0048] There is a shielding cylinder at the position corresponding to workstation 100;

[0049] Specifically, the shielding cylinder includes an outer shielding cylinder 1 and an inner shielding cylinder 3. Both the outer shielding cylinder 1 and the inner shielding cylinder 3 are semi-circular rings, and the radius of the outer shielding cylinder 1 is larger than the radius of the inner shielding cylinder 3. The inner side of the outer shielding cylinder 1 matches the outer side of the inner shielding cylinder 3 to form the shielding cylinder together. The outer shielding cylinder 1 and the inner shielding cylinder 3 can move alternately, thereby opening or closing the shielding cylinder and allowing the hoisting device 4 to move between station 100 and station 200.

[0050] Specifically, an AGV idler wheel 6 is installed at the lower end of the vehicle body 10;

[0051] like Figure 2 , 3 As shown, the three-jaw automatic centering mechanism 7 includes an inflatable washer 71, which is a circular ring structure. A bellows sealing sleeve 8 is installed on its inner side. The upper part of the bellows sealing sleeve 8 matches the circular hole of station 100 or station 200 to achieve a sealing effect. A support lug 72 is connected to the inflatable washer 71. A connecting rod 73 is installed on the support lug 72. The upper end of the connecting rod 73 is connected to the servo electric cylinder 9, and the connecting rod 73 is located in the slide rail 74.

[0052] like Figure 5 As shown, the servo electric cylinder 9 is mounted on the track 91, which is located on the vehicle body 10 and inside the shield 11.

[0053] Specifically, a limit spring 92 is also installed on the vehicle body 10 to limit the servo electric cylinder 9;

[0054] Specifically, the inflatable washer 71 is connected to four lugs 72, each lug is connected to a connecting rod 73, and every two connecting rods are located in a slide rail 74, which extends to the positions of station 100 and station 200.

[0055] Specifically, the lower end of the inflatable gasket 71 is connected to three guide claws 75. When the three-claw automatic centering mechanism 7 docks with the pit 108, the guide claws 75 press against the inner wall of the pit 108 to play a guiding role.

[0056] Specifically, the servo electric cylinder 9 slides on the track 91, and then drives the three-jaw automatic centering mechanism 7 and the bellows sealing sleeve 8 to move on station 100 and station 200 through the connecting rod 73.

[0057] like Figure 2 As shown, a winch guide rail 12 is installed on the top of the shield 11. The winch 4 is installed on the winch guide rail 12 and can move along the winch guide rail 12, thereby switching positions between work station 100 and work station 200.

[0058] Specifically, the hoisting device 4 includes a robotic arm that matches the top end cap of the radioactive filter cartridge being transferred, thereby moving the radioactive filter cartridge out of the pit 108 by the hoisting device 4.

[0059] The shielding cylinder, the bellows sealing sleeve 8, and the shielding cover 11 are all made of radiation shielding material; preferably, lead-containing radiation shielding material is used.

[0060] Example 2

[0061] A dual-station radioactive filter cartridge transfer method includes the following steps:

[0062] S1: Operate the 5T crane to lift the shielding cover 107 and shielding plug 109; and transfer the new filter element to workstation 200.

[0063] S2: Grab the old filter cartridge:

[0064] S2.1: Align the round hole of station 100 of vehicle body 10 with pit 108, open the cover, and drive the three-jaw automatic centering mechanism 7 and bellows sealing sleeve 8 to station 100 through servo electric cylinder 9, so that bellows sealing sleeve 8 is connected with the round hole of station 100, and the guide claw 75 is used to hold the inner wall of pit 108 to achieve centering; and inflate the air gasket 71 to prevent aerosol from overflowing.

[0065] S2.2: Open the cover of station 100, open the shielding cylinder, move the hoisting device 4 to station 100 and descend through the vehicle body 10 into the pit 108. The robotic arm of the hoisting device 4 grabs the old filter element (radioactive filter element). After grabbing, the hoisting device 4 returns to the shielding cylinder, closes the shielding cylinder, closes the cover of station 100, and the robotic arm of the hoisting device 4 opens to place the old filter element in station 100.

[0066] S3: Replace with a new filter;

[0067] S3.1: Open the shielding cylinder, and after the hoisting device 4 moves to station 200, close the shielding cylinder;

[0068] S3.2: The AGV idler wheel 6 drives the vehicle body 10 to move to the left, so that the round hole of the second workstation 200 is aligned with the pit 108. At this time, the servo electric cylinder 9 slides on the slide rail 74, and the three-jaw automatic centering mechanism 7 and the bellows sealing sleeve 8 move to the second workstation 200 through the connecting rod 73, so that the bellows sealing sleeve 8 is connected with the round hole of the second workstation 200, and the cover plate of the second workstation 200 is opened.

[0069] Specifically, at this time, the three-jaw automatic centering mechanism 7 and the bellows sealing sleeve 8 do not move relative to the pit 108, thus preventing the leakage of radioactive materials.

[0070] S3.3: After the robotic arm of the winch device 4 grabs the new filter element, it descends, exits the vehicle body 10, and transfers the new filter element to the pit 108. The robotic arm of the winch device 4 then releases, and the winch device 4 rises back into the vehicle body 10.

[0071] S3.4: Close the cover of station 200, deflate the air gasket 71, and separate the three-jaw automatic centering mechanism 7 from the pit 108;

[0072] S4: Hoist the vehicle body 10 above the CEFE shielded container, open the cover of station 100, and use the robotic arm of the hoisting device 4 to put the old filter element into the inner cylinder of the CEFE; close the cover of station 100.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0074] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0075] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0076] The preferred embodiments disclosed above are merely illustrative of this application. The optional embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this application. These embodiments are selected and specifically described in this application to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize this application.

Claims

1. A double position radioactive filter cartridge transfer device, characterized by: The utility model relates to a shielding device for filter element, including car body (10), hoist (4), three claw automatic centering mechanism (7), bellows seal sleeve (8), install shield (11) on car body (10), the side of shield (11) is opened shielding door (5), shield (11) inside, the car body (10) is divided into work position one (100) and work position two (200) on car body (10), work position one (100), work position two (200) all include the round hole opened on car body (10), and all have the apron on the round hole, the position corresponding to work position one (100) has shielding cylinder.

2. A dual position radioactive filter cartridge transfer device according to claim 1, wherein: Shielding cylinder includes outer shielding cylinder (1), inner shielding cylinder (3), outer shielding cylinder (1), inner shielding cylinder (3) are all semicircle ring type, and the radius of outer shielding cylinder (1) is greater than the radius of inner shielding cylinder (3), the inside of outer shielding cylinder (1) with the outside of inner shielding cylinder (3) match, and outer shielding cylinder (1) and inner shielding cylinder (3) staggered movement, to make shielding cylinder open or close.

3. The dual position radioactive cartridge transfer device of claim 1, wherein: Car body (10) lower end installs AGV idler (6).

4. The dual position radioactive cartridge transfer device of claim 1, wherein: Three claw automatic centering mechanism (7) includes inflatable gasket (71), inflatable gasket (71) is circular ring structure, its inside installs bellows seal sleeve (8), the upper portion of bellows seal sleeve (8) with the round hole of work position one (100) or work position two (200) match, inflatable gasket (71) is connected with support lug (72) on, support lug (72) installs connecting rod (73) on, connecting rod (73) upper end is connected with servo electric cylinder (9), and connecting rod (73) is located in slide (74).

5. A dual position radioactive filter cartridge transfer device according to claim 4, wherein: Servo electric cylinder (9) is installed on track (91), and track (91) is located on car body (10) inside shield (11).

6. A dual position radioactive cartridge transfer device according to claim 5, wherein: Inflatable gasket (71) lower end is connected with 3 guide claws (75).

7. A dual position radioactive filter cartridge transfer device according to claim 6, wherein: Shield (11) inner top installs hoist guide rail (12), hoist (4) is installed on hoist guide rail (12), and can move along hoist guide rail (12), hoist (4) includes manipulator.

8. A dual position radioactive cartridge transfer device according to claim 7, wherein: Shielding cylinder, bellows seal sleeve (8), shield (11) all use radiation shielding material.

9. A method of transporting radioactive filter cartridges in a double position, using the device according to claim 8, characterized in that: It includes the following steps: S1: shield apron (107) and shield plug (109) are lifted, and new filter element is transferred to work position two (200); S2: grab old filter element: S2.1: the round hole of work position one (100) of car body (10) is aligned with pit (108), the apron is opened, and three claw automatic centering mechanism (7) and bellows seal sleeve (8) are moved to work position one (100), the inner wall of pit (108) is pushed by guide claw (75), and inflatable gasket (71) is inflated; S2.2: the apron of work position one (100) is opened, the shielding cylinder is opened, the hoist (4) is moved to work position one (100) and is lowered to pass through car body (10) to pit (108), the manipulator of hoist (4) grabs old filter element, after grabbing, hoist (4) returns to shielding cylinder, the shielding cylinder is closed, the apron of work position one (100) is closed, and the manipulator of hoist (4) is opened, and old filter element is placed in work position one (100); S3: replace new filter element; S3.1: open shielding cylinder, hoist device (4) moves to the back of station two (200), close shielding cylinder; S3.2: through AGV idler (6) drive car body (10) to move left, so that the round hole of station two (200) aligns with pit (108), at this time servo cylinder (9) slides on slide (74), through connecting rod (73) makes three-jaw automatic centering mechanism (7), bellows sealing sleeve (8) move to station two (200), open the cover plate of station two (200); S3.3: the mechanical hand of hoist device (4) picks up new filter element and then drops, goes out of car body (10), transfers new filter element to pit (108), the mechanical hand of hoist device (4) loosens, hoist device (4) rises back to car body (10); S3.4: close the cover plate of station two (200), air cushion ring (71) deflates, three-jaw automatic centering mechanism (7) separates from pit (108).

10. The dual position radioactive filter cartridge transfer method of claim 9, wherein: In the S3.2, three-jaw automatic centering mechanism (7), bellows sealing sleeve (8) do not move relative to pit (108).

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