Negative pressure atmosphere isolation device with hoisting opening and hoisting method

Abstract

The invention discloses a negative pressure atmosphere isolation device with a hoisting opening and a hoisting method, the hoisting opening is formed in the top end of the negative pressure atmosphere isolation device, the hoisting opening is of a cylindrical structure made of a flexible material, the inner diameter of the hoisting opening is larger than the size of the cross section of a to-be-hoisted object, and the length of the hoisting opening is larger than the height of the to-be-hoisted object; one end of the cylindrical structure is adhered and sealed with the top covering surface of the atmosphere isolation device, the end is the end A of the hoisting opening, the other end of the cylindrical structure is sealed by the tying opening, the end is the end B of the hoisting opening, the middle part of the cylindrical structure can be sealed by the tying opening, and the middle part is the position M of the hoisting opening, so that the problem of negative pressure reduction or failure caused by the opening when the negative pressure atmosphere isolation device enters and exits is effectively solved; and meanwhile, diffusion and cross infection of pollutants contaminating the hoisting items are avoided, and guarantee is provided for safety of personnel and equipment in the operation process.

Description

Technical Field

[0001] This invention relates to the field of reactor equipment maintenance, specifically to a negative pressure atmosphere isolation device with a lifting port and a lifting method. Background Technology

[0002] High-temperature gas-cooled reactors (HTGRs) use helium as a coolant. During maintenance of the primary coolant circuit, the primary coolant circuit is typically maintained at positive or slightly positive pressure to ensure the purity of the helium in the core. However, during HTGR operation, the friction and wear of hundreds of thousands of fuel elements and graphite balls within the reactor core generate a certain amount of graphite dust. Openings in the primary coolant circuit during maintenance can lead to leaks of helium, graphite dust, and aerosols, necessitating the use of atmosphere isolation devices to prevent the spread of radioactive materials from the primary coolant circuit and to protect personnel and the environment.

[0003] Chinese patent application CN112850447A discloses a multi-station hoisting device for overhauling control rod drive mechanisms in high-temperature gas-cooled reactors. This device comprises a frame, outer shell, hoisting components, and mounting plates. The frame is a structure formed by multiple columns, with mounting positions for the hoisting components. The outer shell is fitted over the frame, and the hoisting device is connected to an atmosphere isolation device via the mounting plate. When using this device, an atmosphere isolation device must first be erected on the control rod drive mechanism to be disassembled and hoisted. The hoisting device is then erected above the atmosphere isolation device and connected to it via the mounting plate. The hoisting device's frame utilizes a skin-like structure to achieve atmosphere isolation within the hoisting space. The hoisting activity is completed inside the device. The hoisting components, consisting of a crossbeam and an electric hoist, are installed on top of the device. During hoisting, the hoisting device is placed on the atmosphere isolation device, and the mounting plate is secured by positioning columns and positioning sleeves. Start the electric hoist, lower the hook to the control rod drive mechanism inside the atmosphere isolation device, lift the drive mechanism into the hoisting device, and then use the gantry crane in the factory to lift the entire hoisting device to the special maintenance platform to complete the hoisting.

[0004] The aforementioned existing technology has the following drawbacks: during hoisting operations, the hoisting device is in continuous contact with the atmosphere isolation device for an extended period, resulting in continuous radioactive contamination. Furthermore, existing hoisting devices are designed for repeated use, inevitably leading to the risk of cross-contamination between the hoisting device and the object being hoisted, and potentially even exacerbating the contamination of the object. Summary of the Invention

[0005] To achieve the above and other related objectives, this invention discloses a negative pressure atmosphere isolation device with a lifting port. The top of the negative pressure atmosphere isolation device is provided with a lifting port, which is a cylindrical structure made of flexible material. Its inner diameter is larger than the cross-sectional dimension of the object to be lifted, and its length is larger than the height of the object to be lifted. One end of the lifting port is bonded and sealed to the top cover of the atmosphere isolation device, which is end A of the lifting port. The other end of the lifting port can be sealed by a sash, which is end B of the lifting port. The middle part of the cylindrical structure can be sealed by a sash, which is point M of the lifting port.

[0006] Preferably, the flexible material includes at least one of plastic sheeting, three-proof fabric, and Oxford cloth, and the closure includes at least one of adhesive tape, tape, and rope.

[0007] Preferably, the flexible material can be spliced ​​together by bonding after one hoisting operation to ensure sufficient length for the next hoisting operation.

[0008] Secondly, the present invention provides a method for hoisting a negative pressure atmosphere isolation device, using the aforementioned hoisting port of the negative pressure atmosphere isolation device, comprising:

[0009] The lifting port is placed above and outside the atmosphere isolation device, and end A of the lifting port is sealed to the top cover of the atmosphere isolation device, while end B and the middle M are sealed with a ziplock.

[0010] Open the B-end closure and operate the gantry crane to bring the lifting equipment into the lifting opening, while keeping the M-end sealed.

[0011] After the lifting device enters the lifting port, reseal the lifting port B end above the lifting device and unseal the M end to make the ambient atmosphere of the lifting device the same as that inside the atmosphere isolation device.

[0012] Operate the gantry crane to lower the lifting device to a lower height. During the descent, end B of the lifting port descends with the lifting device and folds inward.

[0013] Mounting or unmounting items;

[0014] Operate the gantry crane to raise the lifting device to a higher height. During the raising process, end B of the lifting port rises with the lifting device and folds outward.

[0015] The lifting port is sealed a second time to isolate the ambient atmosphere of the lifting equipment from the atmosphere isolation device, and the lifting port is cut off to separate the lifting port containing the lifting equipment from the atmosphere isolation device.

[0016] Remove the hoisting port that is separate from the atmosphere isolation device.

[0017] Preferably, the secondary sealing of the lifting port includes:

[0018] If the object is to be lifted out of the atmosphere isolation device, after the bottom of the object to be lifted exceeds the atmosphere isolation device, seal the bottom of the object by tying the lifting sleeve at a preset distance at the top and bottom, and cut the lifting sleeve in the middle of the two tying seals to separate the lifting port from the atmosphere isolation device, so that the object to be lifted has been lifted out of the atmosphere isolation device and both the lifting port of the atmosphere isolation device and the object to be lifted are in a sealed state.

[0019] If the object is to be hoisted into the atmosphere isolation device, after the bottom of the hoisting device extends beyond the atmosphere isolation device, seal the bottom of the hoisting sleeve with two slits at a certain distance. Cut the hoisting sleeve in the middle of the two slits to separate the hoisting port from the atmosphere isolation device, so that the hoisting device has left the atmosphere isolation device and both the hoisting port and the hoisting device are sealed.

[0020] Preferably, the mounted or unmounted items include:

[0021] If the item is to be lifted out of the atmosphere isolation device, the lifting equipment will be loaded with the item after reaching the lifting position, and the gantry crane will be operated to lift it up. During the lifting process, the item will be gradually entered into the lifting port, and end B will be kept sealed.

[0022] If the object is to be hoisted into the atmosphere isolation device, after the lifting device is loaded with the object and enters the hoisting opening, the gantry crane is operated to lower the object. During the descent, end B of the hoisting opening is lowered with the lifting device and folds inward, while the lifting device is always exposed in the hoisting opening. After the object reaches the designated position, the lifting device is unloaded and the position of the lifting device is adjusted to detach it from the object.

[0023] By adopting the above technical solution, the lifting port structure is simple, easy to operate, and low in cost. It effectively solves the problem of negative pressure reduction or failure caused by the opening when the negative pressure atmosphere isolation device enters or exits. At the same time, it avoids the spread of pollutants and cross-infection from the hoisted object, providing a guarantee for the safety of personnel and equipment during the operation. After each hoisting is completed, part of the lifting port is cut off and a new lifting port is glued on for the next use, reducing the risk of cross-contamination or worsening of contamination. Attached Figure Description

[0024] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. The drawings are provided for a better understanding of the invention and are not intended to limit the scope of this disclosure. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0025] Figure 1 This is a schematic diagram illustrating the lifting of an item when the lifting port of the present invention is located outside the atmosphere isolation device;

[0026] Figure 2This is a schematic diagram illustrating the lifting of an item when the lifting port of the present invention is located outside the atmosphere isolation device;

[0027] Figure 3 This is a schematic diagram illustrating the lifting of an item when the lifting port of the present invention is located inside the atmosphere isolation device;

[0028] Figure 4 This is a schematic diagram illustrating the lifting of an item when the lifting port of the present invention is located inside an atmosphere isolation device. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Reference Figure 1 This invention provides a negative pressure atmosphere isolation device with a lifting port. The lifting port is a cylindrical structure made of flexible material, with an inner diameter larger than the cross-sectional dimension of the object to be lifted and a length greater than the height of the object to be lifted. The lifting port is located on the top of the atmosphere isolation device, with its A end bonded and sealed to the top surface D of the atmosphere isolation device, its B end sealed by a sash, and the middle part M of the cylindrical structure sealed by a sash.

[0031] The flexible material includes at least one of plastic sheeting, three-proof fabric, and Oxford cloth, and the closure includes at least one of tape, braided tape, and rope.

[0032] After a hoisting operation is completed, the flexible material can be spliced ​​together by bonding to ensure sufficient length for the next hoisting operation.

[0033] The present invention also provides a method for hoisting a negative pressure atmosphere isolation device, which uses the hoisting port of the negative pressure atmosphere isolation device to perform the following steps:

[0034] Reference Figure 1 and Figure 2 The negative pressure atmosphere isolation device is installed with its hoisting port on the outside of the atmosphere isolation device. The A end of the negative pressure atmosphere isolation device is bonded and sealed to the top cover of the atmosphere isolation device, and the B end and the middle M end are sealed with a zip closure.

[0035] Open the B-end closure and operate the gantry crane to bring the lifting equipment into the lifting opening, while keeping the M-end sealed.

[0036] After the lifting device enters the lifting port, reseal the lifting port B end above the lifting device and unseal the M end to make the ambient atmosphere of the lifting device the same as that inside the atmosphere isolation device.

[0037] Operate the gantry crane to lower the lifting device to a lower height. During the descent, end B of the lifting port descends with the lifting device and folds inward.

[0038] Mounting or unmounting items;

[0039] Operate the gantry crane to raise the lifting device to a higher height. During the raising process, end B of the lifting port rises with the lifting device and folds outward.

[0040] The lifting port is sealed a second time to isolate the ambient atmosphere of the lifting equipment from the atmosphere isolation device, and the lifting port is cut off to separate the lifting port containing the lifting equipment from the atmosphere isolation device.

[0041] Remove the hoisting port that is separate from the atmosphere isolation device.

[0042] Mounted or unmounted items include:

[0043] If the item is to be lifted out of the atmosphere isolation device, the lifting equipment will be loaded with the item after reaching the lifting position, and the gantry crane will be operated to lift it up. During the lifting process, the item will be gradually entered into the lifting port, and end B will be kept sealed.

[0044] If the object is to be hoisted into the atmosphere isolation device, after the lifting device is loaded with the object and enters the hoisting opening, the gantry crane is operated to lower the object. During the descent, end B of the hoisting opening is lowered with the lifting device and folds inward, while the lifting device is always exposed in the hoisting opening. After the object reaches the designated position, the lifting device is unloaded and the position of the lifting device is adjusted to detach it from the object.

[0045] The secondary sealing of the lifting port includes:

[0046] If the object is to be lifted out of the atmosphere isolation device, after the bottom of the object to be lifted exceeds the atmosphere isolation device, seal the bottom of the object with two ties at a preset distance, namely C11 and C12, and cut the lifting sleeve in the middle of the two ties to separate the lifting port from the atmosphere isolation device, so that the object to be lifted has been lifted out of the atmosphere isolation device and both the lifting port of the atmosphere isolation device and the object to be lifted are in a sealed state.

[0047] If the object is to be hoisted into the atmosphere isolation device, after the bottom of the hoisting device extends beyond the atmosphere isolation device, two seals, namely C11 and C12, are made at a certain distance at the bottom of the hoisting sleeve. The hoisting sleeve is then cut in the middle of the two seals to separate the hoisting port from the atmosphere isolation device, so that the hoisting device has left the atmosphere isolation device and both the hoisting port and the hoisting device are sealed.

[0048] The above method can be summarized as follows: When it is necessary to lift an item from an atmosphere isolation device, the following steps are included:

[0049] The lifting port of the negative pressure atmosphere isolation device is placed on the outside and above the atmosphere isolation device, and the A end of the negative pressure atmosphere isolation device is bonded and sealed to the top cover of the atmosphere isolation device, while the B end and the middle M part are sealed with a knot.

[0050] Open the B-end closure and operate the gantry crane to bring the lifting equipment into the lifting opening, while keeping the M-end sealed.

[0051] After the lifting device enters the lifting port, reseal the lifting port B end above the lifting device and unseal the M end to make the ambient atmosphere of the lifting device the same as that inside the atmosphere isolation device.

[0052] Operate the gantry crane to lower the lifting device to a lower height. During the descent, end B of the lifting port descends with the lifting device and folds inward.

[0053] After the lifting equipment reaches the lifting position, the object to be lifted is attached. Then, the gantry crane is operated to lift and raise the object. During the lifting process, the object to be lifted is gradually put into the lifting opening, and end B is kept sealed.

[0054] Operate the gantry crane to raise the lifting device to a higher height. During the raising process, end B of the lifting port rises with the lifting device and folds outward.

[0055] After the bottom of the object to be lifted exceeds the atmosphere isolation device, seal the bottom of the object with two ties at a preset distance, and cut the lifting sleeve in the middle of the two ties to separate the lifting port from the atmosphere isolation device, so that the object to be lifted has been lifted out of the atmosphere isolation device and both the lifting port of the atmosphere isolation device and the object to be lifted are in a sealed state.

[0056] Operate the gantry crane to move the hoisted item to the designated area and complete the hoisting process.

[0057] When it is necessary to hoist an object into an atmosphere-isolated device, the following steps are included:

[0058] The lifting port of the negative pressure atmosphere isolation device is placed on the outside and above the atmosphere isolation device, and the A end of the negative pressure atmosphere isolation device is bonded and sealed to the top cover of the atmosphere isolation device, while the B end and the middle M part are sealed with a knot.

[0059] Load the item onto the lifting device, open the sash at end B, and operate the gantry crane to bring the lifting device into the lifting opening. At this time, the M point remains sealed.

[0060] After the lifting device enters the lifting port, reseal the lifting port B end above the lifting device and unseal the M end to make the ambient atmosphere of the lifting device the same as that inside the atmosphere isolation device.

[0061] Operate the gantry crane to lower the lifting device to a lower height. During the descent, end B of the lifting port descends with the lifting device and folds inward.

[0062] After the lifting device is loaded with the object to be lifted into the lifting opening, the gantry crane is operated to lower the object to be lifted. During the descent, end B of the lifting opening is lowered with the lifting device and folds inward, while the lifting device is always exposed in the lifting opening. After the object reaches the designated position, the lifting device is unloaded and the position of the lifting device is adjusted to detach it from the object.

[0063] Operate the gantry crane to raise the lifting device to a higher height. During the raising process, end B of the lifting port rises with the lifting device and folds outward.

[0064] After lifting the lifting device, once the bottom of the lifting device extends beyond the atmosphere isolation device, seal the bottom of the lifting sleeve with two ties at a certain distance between the top and bottom. Cut the lifting sleeve in the middle of the two ties to separate the lifting port from the atmosphere isolation device, so that the lifting device has left the atmosphere isolation device and both the lifting port of the atmosphere isolation device and the lifting device are in a sealed state.

[0065] Operate the gantry crane to remove the lifting equipment, complete the hoisting and installation, and perform measurement and decontamination work on the lifting equipment at the designated location.

[0066] The above-mentioned method for hoisting in and out of objects uses a simple hoisting port structure, is easy to operate, and is inexpensive. It effectively solves the problem of reduced negative pressure or failure caused by the opening when the negative pressure atmosphere isolation device is in and out. At the same time, it avoids the spread of pollutants and cross-infection from the hoisted objects, and provides protection for the safety of personnel and equipment during the operation. After each hoisting is completed, the hoisting port is cut off and a new hoisting port is glued on for the next use, reducing the risk of cross-contamination or worsening of contamination.

[0067] The above-mentioned method of hoisting in and out of items is for situations where there is sufficient longitudinal space above the atmosphere isolation device. When there is insufficient longitudinal space above the atmosphere isolation device and it is not possible to place the hoisting port outside the atmosphere isolation device, the hoisting port can be placed inside the atmosphere isolation device to hoist in and out of the items. In this case, end A of the hoisting port is still bonded to the top cover of the atmosphere isolation device, and the extension direction of the hoisting port extends into the atmosphere isolation device. Ends B and M are both sealed.

[0068] Reference Figure 3 and Figure 4When hoisting in or out an item, first loosen the seal at point M, operate the gantry crane, and ensure the lifting device and item are completely inside the hoisting opening. Then, seal point M again, followed by loosening the seal at end B. Control the lifting device to move downwards until it is completely outside the hoisting opening. If the item is being hoisted in, remove it from the lifting device; if it is being hoisted out, attach the item to the lifting device. After hoisting in or out, control the lifting device to move upwards. When the device reaches inside the hoisting opening, seal end B and loosen the seal at point M. Then, control the lifting device to continue moving upwards, away from the atmosphere isolation device. This method, while avoiding the failure of negative pressure within the atmosphere isolation device, minimizes the diffusion of contaminants and radiation from the atmosphere isolation device to the outside. Furthermore, the hoisting opening is easy to disassemble and can be replaced as needed, resulting in lower costs and a simpler process.

[0069] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined.

[0070] For the sake of simplicity, the method embodiments are described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0071] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of this application.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A negative pressure atmosphere isolation device equipped with a hoisting port, characterized in that, The top of the negative pressure atmosphere isolation device is equipped with a lifting port, which is a cylindrical structure made of flexible material. Its inner diameter is larger than the cross-sectional dimension of the object to be lifted, and its length is larger than the height of the object to be lifted. One end is bonded and sealed to the top cover of the atmosphere isolation device, which is end A of the hoisting port. The other end can be sealed by a sash, which is end B of the hoisting port. The middle part of the cylindrical structure can be sealed by a sash, which is part M of the hoisting port.

2. The negative pressure atmosphere isolation device with a lifting port according to claim 1, characterized in that, The flexible material includes at least one of plastic sheeting, three-proof fabric, and Oxford cloth, and the closure includes at least one of tape, braided tape, and rope.

3. A negative pressure atmosphere isolation device with a lifting port according to claim 1, characterized in that, After a hoisting operation is completed, the flexible material can be spliced ​​together by bonding to ensure sufficient length for the next hoisting operation.

4. A method for hoisting a negative pressure atmosphere isolation device, characterized in that, Using the negative pressure atmosphere isolation device hoisting port as described in any one of claims 1 to 3, perform the following steps: The lifting port is placed above and outside the atmosphere isolation device, and end A of the lifting port is sealed to the top cover of the atmosphere isolation device, while end B and the middle M are sealed with a ziplock. Open the B-end closure and operate the gantry crane to bring the lifting equipment into the lifting opening, while keeping the M-end sealed. After the lifting device enters the lifting port, reseal the lifting port B end above the lifting device and unseal the M end to make the ambient atmosphere of the lifting device the same as that inside the atmosphere isolation device. Operate the gantry crane to lower the lifting device to a lower height. During the descent, end B of the lifting port descends with the lifting device and folds inward. Mounting or unmounting items; Operate the gantry crane to raise the lifting device to a higher height. During the raising process, end B of the lifting port rises with the lifting device and folds outward. The lifting port is sealed a second time to isolate the ambient atmosphere of the lifting equipment from the atmosphere isolation device, and the lifting port is cut off to separate the lifting port containing the lifting equipment from the atmosphere isolation device. Remove the hoisting port that is separate from the atmosphere isolation device.

5. The method according to claim 4, characterized in that, Secondary sealing of the lifting port includes: If the object is to be lifted out of the atmosphere isolation device, after the bottom of the object to be lifted exceeds the atmosphere isolation device, seal the bottom of the object by tying the lifting sleeve at a preset distance at the top and bottom, and cut the lifting sleeve in the middle of the two tying seals to separate the lifting port from the atmosphere isolation device, so that the object to be lifted has been lifted out of the atmosphere isolation device and both the lifting port of the atmosphere isolation device and the object to be lifted are in a sealed state. If the object is to be hoisted into the atmosphere isolation device, after the bottom of the hoisting device extends beyond the atmosphere isolation device, seal the bottom of the hoisting sleeve with two slits at a certain distance. Cut the hoisting sleeve in the middle of the two slits to separate the hoisting port from the atmosphere isolation device, so that the hoisting device has left the atmosphere isolation device and both the hoisting port and the hoisting device are sealed.

6. The method according to claim 4, characterized in that, The mounted or unmounted items include: If the item is to be lifted out of the atmosphere isolation device, the lifting equipment will be loaded with the item after reaching the lifting position, and the gantry crane will be operated to lift it up. During the lifting process, the item will be gradually entered into the lifting port, and end B will be kept sealed. If the object is to be hoisted into the atmosphere isolation device, after the lifting device is loaded with the object and enters the hoisting opening, the gantry crane is operated to lower the object. During the descent, end B of the hoisting opening is lowered with the lifting device and folds inward, while the lifting device is always exposed in the hoisting opening. After the object reaches the designated position, the lifting device is unloaded and the position of the lifting device is adjusted to detach it from the object.

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