Cantilever cover assembly for sealing and isolating inside and outside of hot chamber

Abstract

The utility model relates to a cantilever belt cover assembly for sealing and isolating the inside and the outside of a hot chamber, which at least comprises a cantilever belt cover (101), a rotating unit (102) and a lifting unit (103), the cantilever belt cover (101) is arranged on a hot chamber transfer channel, and a sealing ring (201), a barrel guide pin (202) and a guide flange (208) are arranged on the cantilever belt cover (101); a pull rod assembly (209) is installed in the supporting arm assembly (206), a balance weight (210) is installed on the tail portion of the supporting arm assembly (206), one end of the pull rod assembly (209) is connected with the six-claw shaft (207), and the other end of the pull rod assembly (209) is connected with the rotating unit (102) through a small rotating shaft (301). The radioactive substances are butted and transferred between the shielding operation room and the raw material cutting line operation room.

Description

Technical Field

[0001] This utility model relates to a sealing device, and more particularly to a cantilevered cover assembly for sealing and isolating the interior and exterior of a hot room, which enables the docking and transfer of radioactive materials between the shielded operating room and the raw material cutting line operating room. Background Technology

[0002] The current transfer system consists of imported equipment from around 2000 and some domestically produced equipment. It has various problems that affect production safety and urgently needs to be rectified and replaced.

[0003] As is well known, nuclear raw materials, nuclear products, or nuclear waste are highly radioactive and pose a great threat to the environment and human health. Given the special nature of the nuclear industry's operating environment and conditions, it is essential to ensure safety and reliability during their transfer. Utility Model Content

[0004] The purpose of this invention is to design a cantilevered cover assembly that is reliable in performance, accurate in positioning, meets sealing requirements, is corrosion resistant, and prevents the spread of radioactive materials that could cause environmental pollution or radiation damage to operators.

[0005] The purpose of this utility model is achieved as follows: a cantilevered lid assembly for sealing and isolating the interior and exterior of a hot chamber, characterized by comprising at least: a cantilevered lid 101, a rotating unit 102, and a lifting unit 103, mounted on the hot chamber via a mounting bracket. Firstly, it is used for sealing and isolating the interior and exterior of the hot chamber to prevent the spread of radioactive materials from causing environmental pollution or radiation damage to operators. Secondly, the system uses a rotating pull rod mechanism driven by a motor, and a pawl mechanism to achieve the opening and closing lock function with the 200L drum lid. This enables the unlocking and unlocking operation of the 200L drum lid during material transfer. Then, a lifting motor enables the cantilevered lid system to vertically lift the 200L drum lid from the transfer channel. Next, a swing arm motor enables the overall rotation of the cantilevered lid system, opening the transfer channel and achieving complete connection between the transfer channel inside the hot chamber and the inner cavity of the 200L drum outside the hot chamber, preparing for material transfer. After material transfer is completed, the above steps are reversed to complete the closing and sealing of the 200L drum lid, the hot chamber transfer interface, and other requirements.

[0006] The rotary unit 102 passes through the top surface of the hot chamber and connects to the cantilever cover 101 at the top and the lifting unit 103 at the bottom. The through-wall pipe assembly 305 has an O-ring seal 302 on its mounting surface and a shielded cast iron 304 inside the rotating shaft, which can achieve sealed isolation between the inside and outside of the hot chamber. The small shaft motor 307 is used to drive the six-jaw shaft 207 inside the cantilever cover to rotate, and the electric push rod 306 is used to drive the overall rotation of the cantilever cover.

[0007] The lifting unit 103 is fixed to the bottom of the hot chamber wall via the mounting bracket 401. Its function is to fix the slewing unit 102 to realize the vertical lifting of the cantilever cover 101. After the bottom surface of the double cover is raised above the ground by the screw jack 404, the electric push rod 306 drives the large rotating shaft 303 to rotate the cantilever. Two limit pins are installed on the connecting piece 403. The top is connected to the slewing unit via a bearing, which can mechanically limit the rotation of the large shaft 303 of the slewing unit.

[0008] The advantages of this utility model are:

[0009] (1) This unit has the advantages of convenient and quick operation, simple structure and good sealing effect, which can effectively prevent the spread of radioactive materials from causing environmental pollution and radiation damage to operators.

[0010] (2) Adding a counterweight (cast lead) to the tail of the cantilever can balance the center of gravity of the cantilever to the support point and prevent the "drooping" problem during rotation.

[0011] (3) The linkage assembly is equipped with a hinge mechanism, which optimizes the rigid mechanism to be flexible and can effectively prevent damage to the bearing.

[0012] (4) Add a clamping ring to support the sealing ring.

[0013] The purpose of this invention is to solve the problems of the cantilevered cover assembly during operation, where the center of gravity is on the left and the left side lacks support after the double covers are unscrewed, causing it to droop over time, thus preventing the sealing transfer device from being properly connected and interlocked; and the sealing ring installation method has defects, with the radial installation size being too small and lacking axial support, which can easily lead to the sealing ring falling off and wearing out over a long period of time. This invention aims to prevent the spread of radioactive materials that could cause environmental pollution and radiation damage to operators.

[0014] The present invention will be further described below with reference to the accompanying drawings of the embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the cantilevered cover assembly structure;

[0016] Figure 1 In the middle, the cantilever has a cover; 102-slewing unit; 103-lifting unit;

[0017] Figure 2 This is a diagram of a cantilevered structure with a cover;

[0018] Figure 2 In the middle, 201-sealing ring; 202-bucket guide pin; 203-spring seat assembly; 204-inspection cover plate; 205-knurled head screw; 206-support arm assembly; 207-six-jaw shaft; 208-guide flange; 209-tie rod assembly; 210-counterweight.

[0019] Figure 3 This is a diagram of a gyratory unit structure;

[0020] In the diagram, 301 - small shaft; 302 - O-ring seal; 303 - large shaft; 304 - shielded cast iron; 305 - through-wall pipe assembly; 306 - electric actuator; 307 - small shaft motor;

[0021] Figure 4 It is an improved unit structure diagram;

[0022] Figure 4 In the middle, 401-mounting bracket; 402-positioning screw; 403-connector; 404-screw jack. Detailed Implementation

[0023] like Figure 1 A cantilevered cover assembly for achieving sealed isolation between the interior and exterior of a hot chamber is characterized by comprising at least three main components: a cantilevered cover 101, a swivel unit 102, and a lifting unit 103. The cantilevered cover 101 is installed on the hot chamber transfer channel, and a sealing ring 201, a barrel guide pin 202, and a guide flange 208 are mounted on it. A tie rod assembly 209 is installed inside the support arm assembly 206, and a counterweight 210 is installed at its tail. One end of the tie rod assembly 209 is connected to a six-jaw shaft 207, and the other end is connected to the swivel unit 102 via a small rotating shaft 301.

[0024] During operation, the system first serves as a sealing barrier between the interior and exterior of the hot chamber, preventing the spread of radioactive materials that could cause environmental pollution or radiation damage to operators. Secondly, the system uses a rotating lever mechanism driven by a motor, along with a pawl mechanism, to lock and unlock the 200L drum lid. This allows for unlocking and unlocking of the 200L drum lid during material transfer. Next, a lifting motor enables the cantilever lid system to vertically lift the 200L drum lid from the transfer channel. Finally, a swing arm motor rotates the entire cantilever lid system, opening the transfer channel and achieving complete connection between the hot chamber's transfer channel and the 200L drum's interior cavity outside the hot chamber, thus preparing for material transfer.

[0025] After the material transfer is completed, reverse the above process to complete the requirements such as closing the lid of the 200L drum, closing and sealing the hot chamber transfer interface.

[0026] like Figure 2As shown, the cantilever with cover 101 is installed on the hot chamber transfer channel to achieve sealed isolation between the inside and outside of the hot chamber. It is a key component for double cover locking and cantilever rotation. The cantilever with cover 101 includes: a sealing ring 201, a barrel guide pin 202, a spring seat assembly 203, a maintenance cover plate 204, knurled head screws 205, a support arm assembly 206, a six-jaw shaft 207, a guide flange 208, a tie rod assembly 209, and a counterweight 210. The maintenance cover plate 204 is connected with knurled head screws 205, which can be quickly disassembled and repaired without tools.

[0027] like Figure 3 As shown, the rotary unit 102 passes through the top surface of the hot chamber and connects to the cantilever cover 101 at the top and the lifting unit 103 at the bottom. The through-wall pipe assembly 305 has an O-ring seal 302 on its mounting surface and a shielded cast iron 304 inside the rotating shaft to achieve sealing and isolation between the inside and outside of the hot chamber. The small shaft motor 307 drives the small rotating shaft 301 to rotate, which in turn drives the six-jaw shaft 207 to rotate through the pull rod assembly 209, realizing the opening and closing function of the 200L barrel lid. The electric push rod 306 drives the large rotating shaft 303 to rotate, realizing the overall rotation of the cantilever cover 101, opening the transfer channel and achieving complete connection between the transfer channel inside the hot chamber and the inner cavity of the 200L barrel outside the hot chamber.

[0028] like Figure 4 As shown, the lifting unit 103 includes: a mounting bracket 401, a positioning screw 402, a connector 403, and a screw jack 404. The lifting unit 103 is fixed to the bottom of the hot chamber wall via the mounting bracket 401. Its function is to fix the rotary unit 102 to realize the vertical lifting of the cantilever with cover 101. After the bottom surface of the double cover is raised above the ground by the screw jack 404, the electric push rod 306 drives the large rotating shaft 303 to rotate the cantilever. Two limit pins are installed on the connector 403, and the top is connected to the rotary unit via a bearing, which can mechanically limit the rotation of the large shaft 303 of the rotary unit.

[0029] Main technical parameters of this utility model embodiment

[0030] 1. Interchangeability requirement: It must be compatible with the original transfer system equipment.

[0031] 2. Sealing requirements: ① The sealing performance of the container interface shall not be lower than Level 2 as specified in EJ / T1096; ② The sealing performance of the inner container shall not be lower than Level 3 as specified in EJ / T1096; ③ When the inner container is connected to the interface, the sealing performance of the sealing part shall not be lower than Level 3 as specified in EJ / T1096; ④ During transportation, the sealing performance between the inner container and the interface sealing cover shall not be lower than Level 4 as specified in EJ / T1096.

[0032] 3. Corrosion and radiation resistance requirements: Components installed inside hot chambers should be made of materials resistant to nitric acid and radiation.

Claims

1. A cantilevered cap assembly for sealing and isolating a thermal interior from the outside, characterized in that: at least include: The cantilever with cover (101), the slewing unit (102), and the lifting unit (103) are installed on the hot chamber transfer channel. A sealing ring (201), a barrel guide pin (202), and a guide flange (208) are installed on the cantilever with cover (101). A tie rod assembly (209) is installed inside the support arm assembly (206), and a counterweight (210) is installed at the tail. One end of the tie rod assembly (209) is connected to a six-jaw shaft (207), and the other end is connected to the slewing unit (102) through a small rotating shaft (301).

2. A cantilevered cover assembly for sealing and isolating a thermal interior and exterior according to claim 1, characterized in that: The rotating unit (102) passes through the top surface of the hot chamber and connects to the upper part of the cantilever cover (101) and the lower part of the lifting unit (103); the wall-penetrating pipe assembly (305) has an O-ring seal (302) on its mounting surface and a shielded cast iron (304) inside the rotating shaft to achieve sealing isolation between the inside and outside of the hot chamber. The small shaft motor (307) drives the small rotating shaft (301) to rotate and drives the six-jaw shaft (207) to rotate through the pull rod assembly (209) to achieve the opening and closing function of the 200L barrel lid. The electric push rod (306) drives the large rotating shaft (303) to rotate, so that the cantilever cover (101) rotates as a whole, opening the transfer channel to achieve complete connection between the transfer channel inside the hot chamber and the 200L barrel cavity outside the hot chamber.

3. A cantilevered cover assembly for sealing and isolating a thermal interior from the outside, as described in claim 2, characterized in that: The lifting unit (103) includes: a mounting bracket (401), a positioning screw (402), a connector (403), and a screw jack (404). The mounting bracket (401) is installed on the top of the hot chamber. The positioning screw (402) is used to fix the rotary unit (102) to realize the vertical lifting of the cantilever with cover (101). Two limit pins are installed on the connector (403). The top is connected to the rotary unit (102) through a bearing, which can play a mechanical limiting role in the rotation of the large rotating shaft (303) of the rotary unit.

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