Stack top bundle tube shield and method of assembly, reactor

Abstract

The present application relates to the field of reactor technology, and more particularly to a reactor, a top beam tube shielding body and an assembling method. In the top beam tube shielding body, a hoisting assembly is arranged on the top of a shielding main body, so that remote control hoisting and falling of the shielding body is more convenient. A plurality of support assemblies are arranged around the sidewall of the shielding main body and connected to the sidewall. The sidewall of the shielding main body is adapted to be embedded and connected to each support assembly under the action of gravity, so that the falling and centering of the shielding body are more stable and reliable. A shielding block is adapted to be embedded in the top sidewall of the shielding main body. The shielding block is used to drive the beam tube to be embedded in or removed from the cavity of the shielding main body, so that the beam tube can be accurately and efficiently closed in the cavity of the shielding main body, and the subsequent replacement and maintenance of the beam tube are more convenient. Therefore, the top beam tube shielding body, the assembling method and the reactor can have the functions of anti-seismic, high-precision positioning and disassembly and assembly without personnel intervention in a high radiation environment.

Description

Technical Field

[0001] This invention relates to the field of reactor technology, and more particularly to a reactor top bundle tube shield and its assembly method, and a reactor. Background Technology

[0002] The top-mounted tube (CiADS) of the China initiative Accelerator Driven System serves as a high-vacuum channel between the accelerator and the spallation target, and also constitutes the reactor pressure boundary. The existing gap between the shield and the tube results in a relatively high dose rate within a 3m radius of the center, prohibiting personnel access for extended periods after operation and shutdown. Replacement requires a single-hook overhead crane, but the orientation must be maintained during hoisting. The shield requires seismic resistance and support, but the area within a 3.8m radius of the tube's central axis above the reactor top is a critical structural element and cannot be used as a support landing point. Furthermore, the remaining space above ground is extremely limited due to the presence of reactor cooling pipes and other structures. The concrete shielding material is prone to debris generation due to impact and radiation-thermal stress coupling, endangering reactor operational safety. Traditional structures cannot simultaneously meet the requirements for seismic resistance, remote operation and maintenance, and rapid disassembly and assembly, severely restricting the maintainability of the device.

[0003] Due to the aforementioned issues, existing top-mounted coil shielding cannot be quickly replaced in high-irradiation, confined spaces. Summary of the Invention

[0004] This invention provides a top-mounted tube shield and its assembly method, as well as a reactor, which solves the shortcomings of existing top-mounted tube shields that cannot be quickly replaced in high-irradiation and confined spaces. This invention enables the shield to simultaneously possess earthquake resistance in high-irradiation environments, high-precision positioning, and disassembly and assembly capabilities with zero personnel intervention.

[0005] This invention provides a top-mounted bundled tube shield, comprising: The shielding body has an internal cavity for accommodating the bundle tube; A hoisting assembly is installed on top of the shielding body; Multiple sets of support components surround and are connected to the sidewalls of the shielding body, the sidewalls of the shielding body being adapted to fit and connect to each set of support components under the action of gravity; A shielding block is adapted to be embedded in the top side wall of the shielding body; the shielding block is used to drive the bundle tube to be inserted into or removed from the cavity of the shielding body.

[0006] According to the present invention, a top-mounted bundled tube shielding body is provided, wherein the hoisting assembly comprises: A pair of hinge seats are disposed at the top of the shielding body; The lifting lugs are hinged at both ends to a pair of hinge seats, and the lifting lugs span the top of the cavity of the shielding body.

[0007] According to the present invention, a stack top bundle shield is provided, wherein a counterweight is provided at the connection between the lifting lug and the hinge seat, and a limiting part is provided on the hinge seat. The limiting part is disposed on the rotation plane of the counterweight and is disposed on the side of the counterweight opposite to the lifting lug.

[0008] According to the present invention, a top-mounted bundled tube shielding body is provided, wherein the support assembly includes a support rod, a fitting structure and a locking structure, one end of the support rod is connected to the outer surface of the side wall of the shielding body through the fitting structure, and the other end of the support rod is provided with the locking structure.

[0009] According to the present invention, a top-mounted bundled tube shielding body is provided, wherein the fitting structure includes a limiting embedded plate and a groove plate, the limiting embedded plate is connected to the outer surface of the side wall of the shielding body, and the groove plate is connected to the support rod; the limiting embedded plate is provided with a protruding shaft protruding relative to the outer surface of the side wall of the shielding body, and the groove plate is provided with a slot suitable for the protruding shaft to be embedded and assembled.

[0010] According to the present invention, a top-mounted tube shielding body is provided, wherein the locking structure includes a slider, a guide rail and a pin, the slider is connected to the support rod and the slider is slidably engaged with the guide rail; the pin is adapted to pass through the slider and the guide rail so that the slider is locked in a preset locking position on the guide rail.

[0011] According to the present invention, a top-mounted bundled tube shielding body is provided, wherein the inner surface of the side wall of the shielding body forms the cavity, the side wall of the shielding body is provided with a clearance channel, the clearance channel communicates with the cavity, and the shielding block is adapted to be embedded in the clearance channel; the shielding block is connected to the bundled tube, and the bundled tube can move with the shielding block.

[0012] According to the present invention, a top-of-the-line tube shielding body is provided with a protective layer on the outer surface of the shielding body.

[0013] The present invention also provides a reactor comprising the reactor top bundle shield as described above.

[0014] The present invention also provides a method for assembling a top-mounted tube shield, for performing the assembly of a top-mounted tube shield as described above; or for performing the assembly of a top-mounted tube shield of a reactor as described above.

[0015] The assembly method of the top-mounted bundled tube shield includes the following: The shielding body is hoisted to the pre-set installation position using a hoisting assembly. The shielding body is driven to fall to the preset installation position using the hoisting assembly. The shielding body is located in the preset installation position, and the side wall of the shielding body is fitted and connected to multiple sets of the support assemblies, and the support assemblies are in a self-locking state. The shielding block is used to move the bundle tube and assemble it into the cavity of the shielding body.

[0016] The reactor top bundle tube shield and assembly method provided by this invention have at least the following beneficial effects.

[0017] The stack-top bundled tube shielding provided by this invention (hereinafter referred to as the "shielding body") simultaneously possesses earthquake resistance under high-irradiation environments, high-precision positioning, and disassembly / removal capabilities with zero personnel intervention. The shielding body has an internal cavity for accommodating the bundled tube. A hoisting assembly is located at the top of the shielding body, facilitating the remote-controlled shielding body's hoisting and placement. Multiple sets of support assemblies surround and connect to the sidewalls of the shielding body, which are adapted to fit into and connect to each set of support assemblies under gravity, thus ensuring higher stability and reliability in the placement and centering support of the shielding body during remote-controlled shielding body hoisting and placement. A shielding block is adapted to be embedded in the top sidewall of the shielding body. The shielding block is used to drive the bundled tube into or out of the cavity of the shielding body. The movement of the shielding block drives the movement of the bundled tube, thereby enclosing the bundled tube within the cavity of the shielding body after the remote-controlled shielding body is reliably placed, and facilitating subsequent replacement and maintenance of the bundled tube.

[0018] Therefore, the reactor top bundled tube shielding provided by this invention can significantly reduce the total radiation exposure of maintenance personnel, shorten maintenance time from 30 minutes to 2 minutes, and is easy to disassemble, requiring only 2 minutes to complete the entire disassembly process; the entire installation and maintenance process does not require personnel to enter the near-end high-dose area, truly achieving 100% remote operation and maintenance at the near end; it has the advantages of simple structure and reliable seismic resistance. On the 0.3g safe shutdown earthquake (SSE) test bench, the maximum horizontal displacement of the shielding body after being locked by the support components is <0.5mm, meeting the seismic resistance specifications. Thus, this reactor top bundled tube shielding can solve the technical problem of the inability to quickly replace the reactor top bundled tube shielding body in high-irradiation, confined spaces in CIADS terminal reactors, as well as the technical problem of achieving remote assembly and maintenance of the shielding body in the "near-end unmanned area" and achieving rapid maintenance by personnel in the "far-end low-dose area", and is applicable to reactor top bundled tube shielding scenarios including lead-bismuth cooled fast neutron reactors and other small modular reactors.

[0019] The present invention also provides a reactor including the above-described top-mounted tube shield. By providing the above-described top-mounted tube shield, the reactor possesses all the advantages of the above-described top-mounted tube shield, which will not be elaborated here.

[0020] The present invention also provides a method for assembling a top-mounted tube shield (hereinafter referred to as the "assembly method" or "method"), used to perform the assembly of the top-mounted tube shield described above; or used to perform the assembly of the top-mounted tube shield of the reactor described above. Since this method is the assembly method for the top-mounted tube shield described above, it possesses all the advantages of the top-mounted tube shield described above, which will not be elaborated here. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the top-of-the-line tube shield provided by the present invention.

[0023] Figure 2 This is a partial structural schematic diagram of the lifting lug provided by the present invention.

[0024] Figure 3 This is a schematic diagram of the connection structure between the support arm and the shielding body provided by the present invention.

[0025] Figure 4 This is a top view of the locking structure provided by the present invention.

[0026] Figure 5 This is a front view of the locking structure provided by the present invention.

[0027] Figure 6 This is a schematic diagram of the cooperation between the shielding block and the channel provided by the present invention.

[0028] Figure label: 1. Shielding body; 11. Clearance channel; 12. Shielding block; 13. Protective layer; 14. Limiting embedded plate; 15. Hinge seat; 2. Lifting lug; 21. Counterweight block; 22. Limiting part; 3. Support arm; 31. Slot plate; 4. Slider; 5. Guide rail; 6. Pin body. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0030] The following is combined Figures 1-6 The invention describes the top-mounted bundled tube shield.

[0031] like Figure 1 As shown, the stack-top bundled tube shielding of this embodiment of the invention includes a shielding body 1, a hoisting assembly, multiple sets of support assemblies, and a shielding block 12. The shielding body 1 has an internal cavity for accommodating the bundled tube. The hoisting assembly is located at the top of the shielding body 1, facilitating the hoisting and placement of the remote-controlled shielding. Multiple sets of support assemblies surround and connect to the sidewalls of the shielding body 1. The sidewalls of the shielding body 1 are adapted to fit and connect to each set of support assemblies under gravity, thereby ensuring higher stability and reliability in the placement and centering support of the shielding during the hoisting and placement of the remote-controlled shielding. The shielding block 12 is adapted to be embedded in the top sidewall of the shielding body 1. The shielding block 12 is used to drive the bundled tube into or out of the cavity of the shielding body 1. The movement of the shielding block 12 can drive the bundled tube to move, thereby enclosing the bundled tube within the cavity of the shielding body 1 after the remote-controlled shielding is reliably placed, and making subsequent replacement and maintenance of the bundled tube more convenient. Therefore, the top-mounted bundled tube shielding can simultaneously possess earthquake resistance in high-irradiation environments, high-precision positioning, and disassembly and assembly capabilities with zero personnel intervention.

[0032] In some embodiments, such as Figure 1 and Figure 2 As shown, the lifting assembly includes a lifting lug 2 and a pair of hinge seats 15. The pair of hinge seats 15 are disposed at the top of the shielding body 1. The two ends of the lifting lug 2 are respectively hinged to the pair of hinge seats 15. The lifting lug 2 spans the top of the cavity of the shielding body 1 to provide a lifting fulcrum for the shielding body 1.

[0033] In some specific embodiments, such as Figure 2 As shown, in order to allow the lifting lug 2 to naturally tilt to one side of the top surface of the shielding body 1 when not in a lifting state, it is preferable to have a counterweight 21 at the connection between the lifting lug 2 and the hinge seat 15. The hinge hole of the counterweight 21 is connected to the hinge shaft of the hinge seat 15 to achieve relative rotation between the counterweight 21 and the hinge seat 15. The hinge seat 15 is provided with a limiting part 22, which is disposed on the rotation plane of the counterweight 21 and is located on the side of the counterweight 21 facing away from the lifting lug 2. That is, referring to... Figure 2 As shown, the counterweight 21 rotates around the hinge axis of the hinge seat 15 and drives the lifting lug 2 to rotate. When the lifting lug 2 rotates to the position where it tilts to the top of the shield body 1, the counterweight 21 can be stopped by the limiting part 22 to avoid interference between the lifting lug 2 and the bundle tube and other related mechanisms during the replacement and maintenance of the bundle tube, thus effectively improving the stability and safety of the hoisting.

[0034] In some specific embodiments, such as Figure 1As shown, the lifting lug 2 is preferably configured as an arc-shaped structure. The curvature of the arc-shaped lifting lug 2 is preferably adapted to the side wall of the shielding body 1, that is, the lifting lug 2 naturally tilts to the top of the shielding body 1 and does not exceed the outer surface of the side wall of the shielding body 1, so that it can naturally tilt to the top of the shielding body 1 in the non-lifting state, and can avoid interference with surrounding components.

[0035] In some embodiments, such as Figure 1 , Figure 3 and Figure 4 As shown, the support assembly includes a support rod, a fitting structure, and a locking structure. One end of the support rod is connected to the outer surface of the side wall of the shielding body 1 via the fitting structure. This allows the shielding body 1 to be hoisted above the support assembly and, during its descent to the preset installation position, to be connected to the end of the support rod under gravity via the fitting structure, thereby improving assembly efficiency, accuracy, and safety. The other end of the support rod is equipped with a locking structure. This locking structure can self-lock in the low-dose area far from the shielding body 1 through short-term manual intervention, fixing the locking structure to the ground and thus improving the overall seismic resistance of the shield.

[0036] In some specific embodiments, such as Figure 3 As shown, the fitting structure includes a limiting embedded plate 14 and a groove plate 31. The limiting embedded plate 14 is connected to the outer surface of the side wall of the shielding body 1, providing a support fulcrum for the placement and assembly of the shielding body 1. The groove plate 31 is connected to a support rod. The limiting embedded plate 14 has a protruding shaft protruding relative to the outer surface of the side wall of the shielding body 1, and the groove plate 31 has a slot suitable for the protruding shaft to be embedded in the assembly. During the assembly of the shielding body, the shielding body 1 falls and, with the help of gravity, the limiting embedded plate 14 is embedded in the groove plate 31, and the protruding shaft of the limiting embedded plate 14 is fitted into the slot of the groove plate 31, so that the limiting embedded plate 14 and the groove plate 31 form a shaft-groove embedded fit structure. Reference Figure 3 In the illustrated embodiment, the shaft groove embedded mating structure is that the two cylindrical protruding shafts extending outward from the limiting embedded plate 14 automatically engage with the two open slots on the groove plate 31 under the action of gravity, thereby achieving accurate assembly and positioning between the limiting embedded plate 14 and the groove plate 31, and effectively limiting the rotation state of the shielding body 1 around the axis, thereby achieving accurate positioning and assembly between the shielding body 1 and the support component, and realizing remote operation and centering of the shielding body assembly.

[0037] In some specific embodiments, reference is made to Figure 4 and Figure 5As shown, the locking structure includes a slider 4, a guide rail 5, and a pin 6. The slider 4 is connected to the support rod, and the slider 4 and guide rail 5 are slidably engaged. The guide rail 5 is suitable for fixing to the ground. The sliding engagement between the slider 4 and guide rail 5 allows for flexible adjustment of the horizontal position of the support rod, ensuring that the support assembly can accommodate shielding bodies with different outer diameters. The sliding engagement between the slider 4 and guide rail 5 also provides a certain buffer margin for the lowered shielding body 1. The pin 6 is suitable for passing through the slider 4 and guide rail 5, so that the slider 4 is locked in a preset locking position on the guide rail 5. Preferably, the pin 6 is a tapered pin. After the slider 4 is pushed along the guide rail 5 to the preset locking position, the pin 6 passes through the guide rail 5 and slider 4 to form a seismic locking structure. Preferably, the tapered pin and the tapered pin hole on the slider 4 are interference-fitted, capable of withstanding 0.3g SSE seismic loads. Thus, the support assembly, using a locking structure located at the far end, achieves "zero personnel near-end intervention + short-term remote intervention" in the assembly and disassembly process of the shielding body.

[0038] In some specific embodiments, the support rods are preferably inclined relative to the axis of the shielding body 1. The preferred inclination angle is between 0 and 90 degrees, with an optimal range of 45 to 80 degrees, to ensure that each support rod provides uniform central support to the shielding body 1, preventing the shielding body 1 from tipping over and increasing structural stability. To improve the reliability of the support components for the shielding body 1 and the accuracy of centering, ensuring quick and accurate placement of the shielding body 1 and reducing placement errors, the shielding body preferably has at least three sets of support components. Preferably, the support rods of each set of support components are fixed to the slot plate 31 and are located at the same radial height position on the limiting embedded plate 14 of the shielding body 1. Thus, after the shielding body 1 is placed and fixed by the fitting structure, multiple support rods can provide uniform and stable central support to the shielding body 1.

[0039] In some embodiments, such as Figure 1 As shown, the shield also includes a beam-changing assembly. This assembly enables remote operation of the beam tube for replacement and maintenance, improving the stability and safety of beam tube replacement.

[0040] In some specific embodiments, such as Figure 1 and Figure 6As shown, the inner surface of the sidewall of the shielding body 1 forms the aforementioned cavity. A clearance channel 11 is provided on the sidewall of the shielding body 1. The clearance channel 11 communicates with the cavity. A shielding block 12 is adapted to be embedded within the clearance channel 11. The shielding block 12 connects to the bundle tube, and the bundle tube can move along with the shielding block 12. The embedded connection between the shielding body and the clearance channel 11 enables rapid local clearance and repositioning of the shielding body, thereby achieving zero-personnel intervention during bundle tube replacement and improving the efficiency and safety of bundle tube replacement and maintenance. Furthermore, the movement of the shielding block 12 along with the bundle tube ensures the integrity of the shielding performance of the shielding body 1 before and after the bundle tube is removed. Preferably, the height of the shielding block 12 is adapted to the length of the bundle tube, thus facilitating the movement of the bundle tube. Preferably, the width of the shielding block 12 is adapted to the width of the clearance channel 11, so that the shielding block 12 can reliably fill the clearance channel 11, ensuring that the integrity and reliability of the sidewall shielding performance of the shielding body 1 before and after bundle tube replacement are not affected. Preferably, the inner surface of the shielding block 12 is adapted to the contour of the inner surface of the side wall of the shielding body 1, so that they can be together to form the cavity mentioned above, thereby adapting to the outer wall of the bundle tube, which can more easily fix the bundle tube, prevent the bundle tube from falling off the shielding block 12 during the movement of the bundle tube, and improve transportation safety and reliability.

[0041] In some embodiments, such as Figure 1 As shown, a protective layer 13 is provided on the outer surface of the shielding body 1 to prevent debris from entering the outer surface of the side wall of the shielding body 1, thereby improving the shielding effect of the shielding body 1. Preferably, the protective layer 13 is an aluminum alloy debris-proof protective layer 13. Preferably, the protective layer 13 covers the entire outer surface of the shielding body 1.

[0042] For example, refer to Figure 1As shown, the shielding body 1 in this embodiment is preferably constructed as a hollow cylindrical structure, forming an annular cross-section. An arc-shaped clearance channel 11 is opened in the upper half of the shielding body 1. The clearance channel 11 and the side wall of the shielding body 1 together form the aforementioned annular cross-section structure. The shielding block 12 can be remotely moved into or out of the clearance channel 11 along with the bundle tube, thereby using the shielding block 12 to shield the bundle tube assembled in the cavity. During the movement of the bundle tube in or out, the clearance channel 11 and the shielding block 12 form a localized rapid clearance and repositioning. A pair of hinge seats 15 are provided at the top of the shielding body 1, symmetrically arranged along the axial direction of the shielding body 1. The lifting lugs 2 are connected at both ends to the pair of hinge seats 15 and span across the top of the shielding body 1. The lifting lugs 2 are arc-shaped and can tilt to one side of the top of the shielding body 1, while the shielding block 12 is located on the other side of the top of the shielding body 1. This allows the tilting of the lifting lugs 2 to avoid interference with the shielding block 12. The shielding body has four sets of support components. Correspondingly, four limiting embedded plates 14 are evenly distributed on the outer surface of the side wall of the shielding body 1 at the same level. Four guide rails 5 fixed to the ground are respectively set at the far ends around the preset installation position of the shielding body 1. The angle between the four support rods and the shielding body 1 is 75 degrees. The top of each of the four support rods is fitted into the limiting embedded plate 14 on the outer surface of the side wall of the shielding body 1 through a groove plate 31, so as to limit the placement height of the shielding body 1 and restrict the rotation of the shielding body 1, ensuring stable and reliable placement. After the shielding body 1 is placed, the end of the support rod is pushed to the locking position by the slider 4 on the guide rail 5, and the pin 6 is inserted in the slider 4 and the guide rail 5 to form a lock, thereby ensuring that the support rod is relatively fixed to the ground and preventing slippage that could cause the shielding body 1 to overturn.

[0043] The reactor provided by the present invention is described below. The reactor described below can be referred to in correspondence with the reactor top bundle tube shielding described above.

[0044] Based on the above-described top-mounted tube shield, this embodiment of the invention also provides a reactor. This reactor includes the aforementioned top-mounted tube shield. By providing the aforementioned top-mounted tube shield, the reactor possesses all the advantages of the aforementioned top-mounted tube shield, which will not be elaborated further here.

[0045] In some embodiments, the preferred reactor is a lead-bismuth cooled fast neutron reactor.

[0046] In some embodiments, the preferred reactor is a CIADS terminal reactor.

[0047] The assembly method of the top-of-the-capacity (TOC) shield provided by the present invention is described below. The assembly method of the TOC shield described below can be referred to in correspondence with the TOC shield described above.

[0048] Based on the above-described top-of-reactor (TOD) shield, this embodiment of the invention also provides a method for assembling a TOD shield, used to perform the assembly of the TOD shield as described above; or used to perform the assembly of a reactor's TOD shield as described above. Since this method is the assembly method for the TOD shield described above, it possesses all the advantages of the TOD shield described above, which will not be elaborated further here.

[0049] In some embodiments, the assembly method includes the following.

[0050] The shielding body 1 is hoisted to the top of the preset installation position using the hoisting assembly.

[0051] The shielding body 1 is driven to fall to the preset installation position using the hoisting assembly. The shielding body 1 is in the preset installation position, and the side wall of the shielding body 1 is fitted and connected with multiple sets of support assemblies, and the support assemblies are in a self-locking state.

[0052] The shielding block 12 is used to move the bundle tube and assemble it into the cavity of the shielding body 1.

[0053] In some specific embodiments, the assembly method includes the following steps.

[0054] Step 1: The overhead crane is used to lift the shielding body 1 using the hoisting assembly and move it directly above the preset installation position. The shielding body 1 is then slowly lowered into the bottom groove without touching the bottom.

[0055] Step 2: Fine-tune the rotation angle of the shielding body 1 around the axis so that the top groove plate 31 of the four support arms 3 engages with the convex shaft of the corresponding limit embedded plate 14 set on the side wall of the shielding body 1 to achieve positioning and assembly.

[0056] Step 3: The overhead crane continues to lower the shielding body 1 and unhooks it, causing the lifting lugs 2 of the hoisting assembly to automatically tilt and avoid it.

[0057] Step 4: Manually push the sliders 4 of each support component toward the shielding body 1 to the locked position from the remote end.

[0058] Step 5: Drill a tapered through hole above the overlap of the guide rail 5 and the slider 4, and drive a tapered pin 6 into the hole to lock it in place.

[0059] Step 6: Remotely operate the shielding block 12 to move synchronously with the bundle tube and embed it into the arc-shaped clearance channel 11 at the top of the shielding body 1 until the bundle tube is located in the cavity inside the shielding body 1, thus completing the installation.

[0060] In some specific embodiments, if maintenance of the shielding body is required, the shielding block 12 and the bundle tube are first remotely removed, and then the pin 6 in the locking structure is pulled out. Then, the slider 4 and guide rail 5 are slid at least 0.3 meters away from the shielding body 1. Finally, the shielding body 1 is lifted out by a remotely operated overhead crane. The entire process requires no personnel to enter the near-end high-dose area, and the overall maintenance and disassembly time is a maximum of 2 minutes, making it highly efficient and convenient.

[0061] 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A top-mounted bundled tube shield, characterized in that, include: The shielding body has an internal cavity for accommodating the bundle tube; A hoisting assembly is installed at the top of the shielding body; Multiple sets of support components surround and are connected to the sidewalls of the shielding body, the sidewalls of the shielding body being adapted to fit and connect to each set of support components under the action of gravity; A shielding block is adapted to be embedded in the top side wall of the shielding body; the shielding block is used to drive the bundle tube to be inserted into or removed from the cavity of the shielding body.

2. The top-of-charge tube shielding body according to claim 1, characterized in that, The hoisting assembly includes: A pair of hinge seats are disposed at the top of the shielding body; The lifting lugs are hinged at both ends to a pair of hinge seats, and the lifting lugs span the top of the cavity of the shielding body.

3. The top-of-charge tube shielding body according to claim 2, characterized in that, A counterweight is provided at the connection between the lifting lug and the hinge seat. A limiting part is provided on the hinge seat. The limiting part is located on the rotation plane of the counterweight and is located on the side of the counterweight opposite to the lifting lug.

4. The top-mounted bundled tube shielding according to claim 1, characterized in that, The support assembly includes a support rod, a fitting structure, and a locking structure. One end of the support rod is connected to the outer surface of the side wall of the shielding body through the fitting structure, and the other end of the support rod is provided with the locking structure.

5. The top-of-charge tube shielding body according to claim 4, characterized in that, The fitting structure includes a limiting embedded plate and a groove plate. The limiting embedded plate is connected to the outer surface of the side wall of the shielding body, and the groove plate is connected to the support rod. The limiting embedded plate is provided with a protruding shaft that protrudes relative to the outer surface of the side wall of the shielding body, and the groove plate is provided with a slot suitable for the protruding shaft to be embedded and assembled.

6. The top-of-charge tube shielding body according to claim 4, characterized in that, The locking structure includes a slider, a guide rail, and a pin. The slider is connected to the support rod and slides with the guide rail. The pin is adapted to pass through the slider and the guide rail so that the slider is locked in a preset locking position on the guide rail.

7. The top-of-charge bundled tube shielding according to any one of claims 1-6, characterized in that, The inner surface of the sidewall of the shielding body forms the cavity, and the sidewall of the shielding body is provided with a clearance channel that communicates with the cavity. The shielding block is adapted to be embedded in the clearance channel. The shielding block is connected to the bundle tube, and the bundle tube can move with the shielding block.

8. The top-of-charge tube shielding according to any one of claims 1-6, characterized in that, The outer surface of the shielding body is provided with a protective layer.

9. A reactor, characterized in that, Includes the top-mounted bundled tube shield as described in any one of claims 1-8.

10. A method for assembling a top-mounted bundled tube shield, characterized in that, Used for assembling the top bundle shield as described in any one of claims 1-8; or used for assembling the top bundle shield of the reactor as described in claim 9; The assembly method of the top-mounted bundled tube shield includes the following: The shielding body is hoisted to the pre-set installation position using a hoisting assembly. The shielding body is driven to fall to the preset installation position using the hoisting assembly. The shielding body is located in the preset installation position, and the side wall of the shielding body is fitted and connected to multiple sets of the support assemblies, and the support assemblies are in a self-locking state. The shielding block is used to move the bundle tube and assemble it into the cavity of the shielding body.

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