Pressure vessel heat preservation integral assembly structure and assembly method

Abstract

The application provides a pressure container heat preservation integral assembly structure and an assembly method, and relates to the technical field of pressure container equipment. The pressure container heat preservation integral assembly structure comprises a bottom head flow guide, a cylinder body section flow guide, a connecting pipe section heat preservation frame, a bottom head heat preservation support and a deformation prevention tooling lifting appliance. The bottom head flow guide is arranged at the bottom of the cylinder body section flow guide, and the connecting pipe section heat preservation frame is arranged at the top of the cylinder body section flow guide. The bottom head flow guide is located on the bottom head heat preservation support. The deformation prevention tooling lifting appliance is located in the cylinder body section flow guide. The deformation prevention tooling lifting appliance is provided with a radial support rod. The cylinder body section flow guide is provided with a first connecting hole for adapting to the radial support rod. The bottom head flow guide, the cylinder body section flow guide and the connecting pipe section heat preservation frame are all provided with a heat preservation layer. The technical effect of reducing the construction difficulty is achieved.

Description

Technical Field

[0001] This invention relates to the field of pressure vessel equipment technology, and more specifically, to an integral assembly structure and assembly method for pressure vessel insulation. Background Technology

[0002] The AP reactor type is a large-scale advanced pressurized water reactor nuclear power plant with independent intellectual property rights, developed through digestion, absorption, and reinnovation based on imported technology. The AP reactor type has become one of the main reactor types for third-generation nuclear power plant construction. Its key equipment (such as the pressure vessel) has been domestically developed and has completed installation verification. The CAP series reactor type is an important milestone in the transition from imported nuclear power technology to independent innovation, combining the safety characteristics of the AP reactor type with localized improvements, laying the foundation for the development of subsequent larger-power models such as the CAP series reactor type.

[0003] Traditional AP-type pressure vessels have many sections of insulation layer baffles. The thermal expansion gaps between the baffles may become potential air leakage channels in the VCS, resulting in poor sealing. The insulation layer support of the traditional insulation layer cylinder section has a large amount of welding, and it is located on the main line of pressure vessel hoisting and positioning, which leads to a long construction period. Due to the multi-layer structure, the accuracy of the size matching and installation position between each layer is required. Moreover, the construction is carried out in a small working space inside the island, which increases the construction difficulty. Summary of the Invention

[0004] The purpose of this invention is to provide an integral assembly structure and assembly method for pressure vessel insulation, so as to alleviate the technical problem of high construction difficulty in the prior art.

[0005] In a first aspect, embodiments of the present invention provide an integral assembly structure for the insulation of a pressure vessel, including a bottom end cap flow guide, a cylinder section flow guide, a pipe section insulation frame, a bottom end cap insulation bracket, and anti-deformation tooling and lifting fixtures; The bottom end cap guide is located at the bottom of the cylindrical section guide, and the pipe section insulation frame is located at the top of the cylindrical section guide; The bottom end cap guide is located on the bottom end cap insulation bracket; The anti-deformation tooling lifting device is located inside the cylindrical section guide member. The anti-deformation tooling lifting device has a radial support rod, and the cylindrical section guide member has a first connecting hole for matching the radial support rod. The bottom end cap guide, the cylinder section guide, and the pipe section insulation frame are all provided with insulation layers.

[0006] In conjunction with the first aspect, the present invention provides one possible implementation of the first aspect, wherein the bottom end cap guide includes a multi-lobed guide plate and a water inlet assembly; The multi-lobed guide plates are spliced ​​together to form a bowl-shaped structure, and the water inlet assembly is located at the bottom of the multi-lobed guide plates.

[0007] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein both the guide plate and the water inlet assembly are provided with the heat insulation layer.

[0008] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the insulation layer on the above-mentioned cylindrical section guide member is provided with a second connecting hole for fitting with the radial support rod.

[0009] In conjunction with the first aspect, the present invention provides one possible implementation of the first aspect, wherein the bottom end heat preservation bracket includes a plurality of support members, and the plurality of support members are detachably connected to each other.

[0010] In conjunction with the first aspect, the present invention provides one possible implementation of the first aspect, wherein the above-mentioned support member includes a support column, an adjusting connecting plate, a support base, and a thermal insulation quick-sealing plate; The adjusting connecting plate is disposed on the supporting column, and the adjusting connecting plates on the plurality of supporting members are interconnected. The support base for supporting the bottom end cap guide is disposed on the adjustment connecting plate, and the heat-insulating quick-sealing plate for supporting the heat insulation layer on the bottom end cap guide is disposed on the support base.

[0011] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the above-mentioned anti-deformation tooling lifting device includes a lifting frame, a lifting support base, and the radial support rod; The lifting frame is provided with a plurality of lifting support seats, and each of the lifting support seats is provided with an adjustable radial support rod.

[0012] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the above-mentioned anti-deformation tooling lifting device further includes an anti-deformation top rod, the anti-deformation top rod is adjustablely disposed on the lifting device frame, and the anti-deformation top rod can abut against the inner wall of the cylinder section guide member.

[0013] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein a first shielding member for heat preservation is provided between the bottom end cap guide and the cylindrical section guide, and a second shielding member for heat preservation is provided between the cylindrical section guide and the pipe section insulation frame.

[0014] Secondly, embodiments of the present invention provide a method for integrally assembling a pressure vessel insulation structure, comprising the following steps: Assemble the bottom head insulation bracket outside the nuclear island, and then assemble the bottom head flow guide on the bottom head insulation bracket; Assemble the flow guide component of the cylinder section and hoist it to the top of the flow guide component of the bottom head. Then, hoist the insulation frame of the pipe section to the top of the flow guide component of the cylinder section to form an integral structure. Assemble the anti-deformation tooling and hoist it into the inside of the cylinder section guide component. Adjust the radial support rod and anti-deformation top rod on the anti-deformation tooling and hoist it so that the radial support rod passes through the first connecting hole and the second connecting hole, and the anti-deformation top rod is pressed against the inner wall of the cylinder section guide component. Then, an insulation layer is laid on the bottom head guide, the cylinder section guide, and the pipe section insulation frame; Using anti-deformation tooling and lifting equipment, the bottom head guide component, the cylinder section guide component, and the pipe section insulation frame were hoisted as a whole to the installation position inside the nuclear island. After hoisting is completed, install the water inlet assembly and insulation layer at the bottom of the bottom end cap guide. Finally, install the shielding components between the bottom end cap guide, the cylinder section guide, and the pipe section insulation frame.

[0015] Beneficial effects: This invention provides an integrally assembled structure for the insulation of a pressure vessel, including a bottom head guide, a cylindrical section guide, a connecting pipe section insulation frame, a bottom head insulation bracket, and an anti-deformation tooling lifting device. The bottom head guide is located at the bottom of the cylindrical section guide, and the connecting pipe section insulation frame is located at the top of the cylindrical section guide. The bottom head guide is situated on the bottom head insulation bracket. The anti-deformation tooling lifting device is located inside the cylindrical section guide, and has a radial support rod. The cylindrical section guide has a first connecting hole for fitting the radial support rod. Insulation layers are provided on the bottom head guide, the cylindrical section guide, and the connecting pipe section insulation frame.

[0016] Specifically, by prefabricating the bottom head insulation support outside the nuclear island, assembling the bottom head guide component, cylinder section guide component, and pipe section insulation frame on the basis of the bottom head insulation support, and finally using anti-deformation tooling to lift the entire insulation layer into the nuclear island for installation, the construction period of the main line for lifting and positioning the pressure vessel can be significantly reduced. The original 40-day main line installation time for pressure vessel insulation has been reduced to 10 days, a time reduction of 75%, which reduces construction difficulty and improves construction efficiency.

[0017] This invention provides a method for integrally assembling insulation of a pressure vessel, used for an integrally assembled insulation structure of a pressure vessel, comprising the following steps: assembling a bottom head insulation bracket outside the nuclear island, then assembling a bottom head flow guide on the bottom head insulation bracket; assembling a cylindrical section flow guide and hoisting the cylindrical section flow guide to the top of the bottom head flow guide, then hoisting a connecting pipe section insulation frame to the top of the cylindrical section flow guide to form an integral structure; assembling an anti-deformation tooling lifting device and hoisting the anti-deformation tooling lifting device into the cylindrical section flow guide device, adjusting the radial... Support rods and anti-deformation top rods are used, allowing the radial support rods to pass through the first and second connecting holes, while the anti-deformation top rods are pressed tightly against the inner wall of the cylinder section guide component. Then, an insulation layer is laid on the bottom head guide component, cylinder section guide component, and nozzle section insulation frame. Using anti-deformation lifting tools, the entire structure of the bottom head guide component, cylinder section guide component, and nozzle section insulation frame is hoisted to its installation position within the nuclear island. After hoisting, the water inlet assembly and insulation layer at the bottom of the bottom head guide component are installed. Finally, the shielding components between the bottom head guide component, cylinder section guide component, and nozzle section insulation frame are installed. This pressure vessel insulation assembly method has the aforementioned advantages compared to existing technologies, which will not be elaborated further here. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall assembly structure for the thermal insulation of a pressure vessel provided in an embodiment of the present invention; Figure 2 This is an exploded view of the integral assembly structure for the thermal insulation of a pressure vessel provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the multi-lobed guide plate in the overall assembly structure for heat preservation of a pressure vessel provided in an embodiment of the present invention; Figure 4 A schematic diagram of the support base of the bottom end heat preservation bracket in the pressure vessel heat preservation integral assembly structure provided in the embodiment of the present invention; Figure 5 This is a schematic diagram of the anti-deformation tooling and lifting fixture in the pressure vessel insulation integral assembly structure provided in this embodiment of the invention.

[0020] icon: 100 - Bottom head guide component; 110 - Baffle plate; 120 - Water inlet assembly; 200 - Flow guide for cylinder body section; 210 - First connecting hole; 220 - Second connecting hole; 300 - Insulation frame for the pipe section; 310 - Second shielding component; 400-Bottom end cap insulation bracket; 410-Support component; 411-Support column; 412-Adjusting connecting plate; 413-Support base; 414-Insulation quick-sealing plate; 500 - Anti-deformation tooling and lifting fixture; 510 - Radial support rod; 520 - Lifting fixture frame; 530 - Lifting support base; 540 - Anti-deformation top rod; 610 - Bottom end cap insulation layer; 620 - Cylinder body section insulation layer; 630 - Connecting pipe section insulation layer. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0026] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this embodiment provides an integrally assembled pressure vessel insulation structure, including a bottom head guide 100, a cylindrical section guide 200, a pipe section insulation frame 300, a bottom head insulation bracket 400, and an anti-deformation tooling lifting device 500. The bottom head guide 100 is located at the bottom of the cylindrical section guide 200, and the pipe section insulation frame 300 is located at the top of the cylindrical section guide 200. The bottom head guide 100 is located on the bottom head insulation bracket 400. The anti-deformation tooling lifting device 500 is located inside the cylindrical section guide 200, and the anti-deformation tooling lifting device 500 has a radial support rod 510. The cylindrical section guide 200 has a first connecting hole 210 for fitting with the radial support rod 510. Insulation layers are provided on the bottom head guide 100, the cylindrical section guide 200, and the pipe section insulation frame 300.

[0027] Specifically, by prefabricating a bottom end heat preservation bracket 400 outside the nuclear island, and assembling a bottom end heat preservation guide 100, a cylinder section heat preservation guide 200, and a pipe section heat preservation frame 300 on the bottom end heat preservation bracket 400 to form an integral heat preservation layer, and finally using an anti-deformation tooling hoisting tool 500 to hoist the integral heat preservation layer into the nuclear island for installation, the construction period of the main line for the hoisting and positioning of the pressure vessel can be significantly reduced, reducing the original 40-day main line installation time for pressure vessel heat preservation to 10 days, a time reduction of 75%, reducing construction difficulty and improving construction efficiency.

[0028] The insulation layer is divided into a bottom end cap insulation layer 610, a cylinder section insulation layer 620, and a pipe section insulation layer 630. The bottom end cap insulation layer 610 is installed on the bottom end cap guide 100, the cylinder section insulation layer 620 is installed on the cylinder section guide 200, and the pipe section insulation layer 630 is installed on the pipe section insulation frame 300.

[0029] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in the optional embodiment, the bottom end cap guide 100 includes a multi-lobed guide plate 110 and a water inlet assembly 120; the multi-lobed guide plates 110 are spliced ​​together to form a bowl-shaped structure, and the water inlet assembly 120 is disposed at the bottom of the multi-lobed guide plate 110.

[0030] Both the baffle plate 110 and the water inlet assembly 120 are provided with a heat insulation layer.

[0031] The insulation layer on the cylindrical section guide member 200 is provided with a second connecting hole 220 for matching the radial support rod 510.

[0032] Among them, a first shielding component for heat preservation is provided between the bottom head guide component 100 and the cylinder section guide component 200, and a second shielding component 310 for heat preservation is provided between the cylinder section guide component 200 and the pipe section insulation frame.

[0033] Specifically, the bottom head guide component 100 and the cylinder section guide component 200 adopt a segmented design, which can be quickly assembled outside the nuclear island in a "building block" manner, greatly reducing the installation difficulty, reducing construction difficulty, and improving construction efficiency.

[0034] In addition, the overall insulation layer of the bottom head guide 100, the cylinder section guide 200, and the pipe section insulation frame 300 is covered by the insulation layer, which improves the sealing effect and enhances the insulation effect. Furthermore, a first shielding component for insulation is set between the bottom head guide 100 and the cylinder section guide 200, and a second shielding component 310 for insulation is set between the cylinder section guide 200 and the pipe section insulation frame. The thermal bridge is reduced to only the radial support rod 510, which reduces the number of thermal bridges and reduces the heat loss in the reactor cavity by more than 20%.

[0035] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in the optional embodiment, the bottom end heat preservation bracket 400 includes multiple support members 410, which are detachably connected to each other.

[0036] The support component 410 includes a support column 411, an adjusting connecting plate 412, a support base 413, and a thermal insulation quick-sealing plate 414. The adjusting connecting plate 412 is mounted on the support column 411, and the adjusting connecting plates 412 on multiple support components 410 are interconnected. The support base 413 for supporting the bottom end guide component 100 is mounted on the adjusting connecting plate 412, and the thermal insulation quick-sealing plate 414 for supporting the thermal insulation layer on the bottom end guide component 100 is mounted on the support base 413.

[0037] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in the optional scheme of this embodiment, the anti-deformation tooling lifting device 500 includes a lifting frame 520, a lifting support seat 530 and a radial support rod 510; the lifting frame 520 is provided with a plurality of lifting support seats 530, and each lifting support seat 530 is adjustablely provided with a radial support rod 510.

[0038] The anti-deformation tooling lifting device 500 also includes an anti-deformation top rod 540, which is adjustablely mounted on the lifting device frame 520 and can abut against the inner wall of the cylinder section guide member 200.

[0039] Specifically, during the hoisting process, the radial support rod 510 of the anti-deformation tooling hoist 500 is inserted into the first connecting hole 210 and the second connecting hole 220, which can hoist the overall insulation layer. After the overall insulation module is hoisted to the preset site in the nuclear island, the workers can rotate the radial support rod 510 to make it retract from the first connecting hole 210 and the second connecting hole 220. Then, a separate radial support rod 510 is inserted to connect the cylinder section guide 200 and the insulation layer thereon.

[0040] Furthermore, the anti-deformation top rod 540 prevents deformation of the guide plate 110, effectively controlling the deformation of the overall insulation module and ensuring precise docking and installation accuracy during on-site hoisting. After hoisting, workers can rotate the anti-deformation top rod 540 away from the inner wall of the guide component 200 in the cylinder section.

[0041] This embodiment provides a method for integral assembly of pressure vessel insulation, used for integral assembly structure of pressure vessel insulation, including the following steps: assembling a bottom head insulation bracket 400 outside the nuclear island, then assembling a bottom head guide component 100 on the bottom head insulation bracket 400; assembling a cylinder section guide component 200, and hoisting the cylinder section guide component 200 to the top of the bottom head guide component 100, then hoisting a pipe section insulation frame 300 to the top of the cylinder section guide component 200 to form an integral structure; assembling an anti-deformation tooling lifting device 500, and hoisting the anti-deformation tooling lifting device 500 into the cylinder section guide component 200, adjusting the radial support rod 510 and the anti-deformation top rod on the anti-deformation tooling lifting device 500. 540, so that the radial support rod 510 passes through the first connecting hole 210 and the second connecting hole 220, and the anti-deformation top rod 540 presses against the inner wall of the cylinder section guide 200; then, an insulation layer is laid on the bottom head guide 100, the cylinder section guide 200 and the pipe section insulation frame 300; the anti-deformation tooling hoist 500 is used to hoist the bottom head guide 100, the cylinder section guide 200 and the pipe section insulation frame 300 as a whole structure to the installation position inside the nuclear island; after the hoisting is completed, the water inlet assembly 120 and the insulation layer at the bottom of the bottom head guide 100 are installed; finally, the shielding component between the bottom head guide 100, the cylinder section guide 200 and the pipe section insulation frame 300 is installed.

[0042] Specifically, the overall construction process can be divided into four steps: First, the bottom head guide component 100, the cylinder section guide component 200, the nozzle section insulation frame 300, and the insulation layer are assembled outside the nuclear island to form an integral insulation layer; then, the lower radiation shielding component support and other items are installed inside the reactor pressure vessel cavity; then, the integral insulation layer is hoisted into place inside the reactor pressure vessel cavity module; finally, the individual radial support rod 510, the middle radiation shielding component support and other items are installed; after all this is completed, the pressure vessel can be hoisted.

[0043] Assembly and installation site outside the nuclear island: A sufficient assembly area is designated outside the nuclear island, and the overall insulation layer is assembled by erecting scaffolding.

[0044] Basic layout: Lay a layer of steel plate on the cement ground. The steel plate in contact with the product should be level with a deviation of no more than 2mm. Mark the position and center of the 16 support columns 411.

[0045] The bottom end cap insulation bracket 400 consists of eight support components 410, which form the load-bearing foundation of the overall insulation layer. Each support component 410 has two support columns 411. The azimuth of the center point of the 16 support columns 411 on the ground deviates from the theoretical azimuth by ±15mm, and the center circle on the ground is ±15mm.

[0046] Installation of the bottom end cap guide 100 and the cylinder section guide 200: Both the bottom end cap guide 100 and the cylinder section guide 200 are 8-petal structures, connected by bolts; during the installation of the bottom end cap guide 100 and the bottom end cap insulation bracket 400, key dimensions are measured. The dimensional control is that the inner diameter tolerance of the upper opening of the bottom end cap guide 100 is between -1 and -9 mm, and the inner diameter tolerance of the lower opening is between 0 and +10 mm; the misalignment of the inner surface joint of the bottom end cap guide 100 is ≤1.5 mm, and the gap of the inner surface joint of the bottom end cap guide 100 is ≤1.5 mm. Any excess should be sealed with a sealing plate; during adjustment, it is recommended to prioritize ensuring the dimensions of the upper and lower openings, and then adjust the misalignment and gap after ensuring the dimensions of the upper and lower openings. Install the flow guide 200 in the cylinder section. The dimensions are controlled such that the inner diameter tolerance of the flow guide 110 is between -1 and -9 mm. There are no less than 4 layers in the height direction (including at least: within 100 mm above the lowest point, within 100 mm below the highest point, and basically evenly distributed in the middle), with at least 16 points in each layer. The misalignment of the inner surface joint of the flow guide 200 in the cylinder section is ≤1.5 mm. The gap of the inner surface joint of the flow guide 200 in the cylinder section is ≤1.5 mm. Any part exceeding this gap is sealed with a sealing plate.

[0047] Installation of the bottom head insulation layer 610: Each insulation block weighs less than 30kg, facilitating rapid manual assembly; the bottom head insulation layer 610 consists of 5 layers, with insulation blocks in the same layer fixed with rivets. The bottommost first layer insulation block is the water inlet assembly 120, which is installed after the pressure vessel is hoisted into place inside the nuclear island; the controlled dimensions of the bottom head insulation layer 610 are such that the distance tolerance between the upper plane of the bottom head guide 100 and the lower plane of the second layer of the bottom head insulation layer 610 is 0 to -3mm, and the tolerance of the upper outer diameter of the bottom head insulation layer 610 is ±3mm (average value, which can be calculated by measuring the circumference).

[0048] Install the insulation layer 620 in the cylinder section: each insulation block weighs less than 30kg, facilitating quick manual assembly; a total of 5 layers, with insulation blocks in the same layer fixed with rivets; when installing the insulation layer 620 in the cylinder section, control the minimum gap between each insulation block and the outer circle of the guide plate 110 to be no less than 7mm; at the same time, measure the circumference of the outer surface of each insulation layer (within 100mm at both ends) to ensure that the average gap between the insulation block and the guide plate 110 is no less than 12mm; the gap between the upper and lower layers is not subject to assessment requirements.

[0049] Installation of anti-deformation fixtures and lifting tools: After the anti-deformation fixture lifting tool 500 is assembled, it is verified. Then, the anti-deformation fixture lifting tool 500 is installed into the cylinder section guide component 200. After the lifting is completed, the anti-deformation fixture lifting tool 500 is removed from the cylinder section guide component 200. The radial support rods 510 at the top and bottom of the anti-deformation fixture lifting tool 500, the upper anti-deformation top rod 540, and the lower anti-deformation top rod 540 can cooperate with the cylinder section guide component 200. The radial support rods 510, the upper anti-deformation top rod 540, and the lower anti-deformation top rod 540 can be close to or far away from the cylinder section guide component 200.

[0050] The installation of the pressure vessel's overall insulation layer is completed within the nuclear island before it enters the reactor pit: Inside the reactor pressure vessel cavity, the lower radiation shielding assembly support and the middle radiation shielding assembly support base plate are installed. Then, the overall insulation of the pressure vessel is hoisted into place.

[0051] Before the actual hoisting, 3D scanning technology was used to accurately simulate the spatial relationship between the integral insulation layer, the reactor pressure vessel cavity, and the nuclear testing sleeve, ensuring that the minimum safe distance was calculated, thus eliminating the risk of collision during the simulation phase. After confirming that the simulation results were correct and met the safe hoisting conditions, the subsequent actual operation was carried out. The integral insulation layer was assembled outside the island and transported to the hoisting area outside the nuclear island. A 1600t gantry crane, in conjunction with anti-deformation lifting equipment, smoothly hoisted the integral insulation layer into place inside the reactor pressure vessel cavity module.

[0052] The pressure vessel insulation layer is hoisted into the crater, and radial supports for connecting the cylinder section guide component 200 and its insulation layer, the central radiation shielding component bracket, and the cylinder section sealing insulation layer are installed.

[0053] In addition, the pressure vessel insulation integral assembly method provided in this embodiment has the advantages of the above-mentioned pressure vessel insulation integral assembly structure compared with the prior art, which will not be elaborated here.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended 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 therein. Such 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 pressure vessel insulation integral assembly structure, characterized in that, include: Bottom head guide (100), cylinder section guide (200), pipe section insulation frame (300), bottom head insulation bracket (400) and anti-deformation tooling lifting device (500). The bottom end cap guide (100) is located at the bottom of the cylindrical section guide (200), and the pipe section insulation frame (300) is located at the top of the cylindrical section guide (200). The bottom end cap guide (100) is located on the bottom end cap insulation bracket (400); The anti-deformation tooling lifting device (500) is located inside the cylindrical section guide member (200). The anti-deformation tooling lifting device (500) has a radial support rod (510) on its position. The cylindrical section guide member (200) has a first connecting hole (210) for adapting to the radial support rod (510). The bottom end cap guide (100), the cylinder section guide (200), and the pipe section insulation frame (300) are all provided with insulation layers.

2. The pressure vessel insulation integral assembly structure according to claim 1, characterized in that, The bottom end cap guide (100) includes a multi-lobed guide plate (110) and a water inlet assembly (120). The multi-lobed guide plates (110) are spliced ​​together to form a bowl-shaped structure, and the water inlet assembly (120) is located at the bottom of the multi-lobed guide plates (110).

3. The pressure vessel insulation integral assembly structure according to claim 2, characterized in that, Both the flow guide plate (110) and the water inlet assembly (120) are provided with the heat insulation layer.

4. The pressure vessel insulation integral assembly structure according to claim 1, characterized in that, The insulation layer on the cylindrical section guide (200) is provided with a second connecting hole (220) for matching the radial support rod (510).

5. The pressure vessel insulation integral assembly structure according to claim 1, characterized in that, The bottom end heat preservation bracket (400) includes multiple support members (410), and the multiple support members (410) are detachably connected to each other.

6. The pressure vessel insulation integral assembly structure according to claim 5, characterized in that, The support component (410) includes a support column (411), an adjusting connecting plate (412), a support base (413), and a heat-insulating quick-sealing plate (414). The adjusting connecting plate (412) is disposed on the supporting column (411), and the adjusting connecting plates (412) on the plurality of supporting members (410) are interconnected; The support base (413) for supporting the bottom end cap guide (100) is disposed on the adjustment connecting plate (412), and the heat insulation quick-sealing plate (414) for supporting the heat insulation layer on the bottom end cap guide (100) is disposed on the support base (413).

7. The pressure vessel insulation integral assembly structure according to claim 1, characterized in that, The anti-deformation tooling lifting device (500) includes a lifting frame (520), a lifting support base (530), and the radial support rod (510). The lifting frame (520) is provided with a plurality of lifting support seats (530), and each of the lifting support seats (530) is provided with an adjustable radial support rod (510).

8. The pressure vessel insulation integral assembly structure according to claim 7, characterized in that, The anti-deformation tooling lifting device (500) also includes an anti-deformation top rod (540), which is adjustablely mounted on the lifting device frame (520) and can abut against the inner wall of the cylinder section guide (200).

9. The pressure vessel insulation integral assembly structure according to claim 1, characterized in that, A first shielding component for heat preservation is provided between the bottom end cap guide (100) and the cylinder section guide (200), and a second shielding component (310) for heat preservation is provided between the cylinder section guide (200) and the pipe section insulation frame.

10. A method for integrally assembling insulation of a pressure vessel, characterized in that, The integral assembly structure for thermal insulation of pressure vessels as described in any one of claims 1-9 includes the following steps: Assemble the bottom end heat insulation bracket (400) outside the nuclear island, and then assemble the bottom end heat insulation bracket (400) and the bottom end flow guide (100). Assemble the cylinder section guide component (200), and hoist the cylinder section guide component (200) to the top of the bottom head guide component (100). Then hoist the pipe section insulation frame (300) to the top of the cylinder section guide component (200) to form an integral structure. Assemble the anti-deformation tooling lifting device (500) and lift the anti-deformation tooling lifting device (500) into the inside of the cylinder section guide component (200). Adjust the radial support rod (510) and anti-deformation top rod (540) on the anti-deformation tooling lifting device (500) so that the radial support rod (510) passes through the first connecting hole (210) and the second connecting hole (220), and the anti-deformation top rod (540) presses against the inner wall of the cylinder section guide component (200); Then, an insulation layer is laid on the bottom head guide (100), the cylinder section guide (200), and the pipe section insulation frame (300); Using anti-deformation tooling and lifting equipment (500), the bottom head guide component (100), the cylinder section guide component (200), and the pipe section insulation frame (300) are hoisted as a whole to the installation position inside the nuclear island; After hoisting is completed, install the water inlet assembly (120) and insulation layer at the bottom of the bottom end cap guide (100); Finally, install the shielding between the bottom end cap guide (100), the cylinder section guide (200), and the pipe section insulation frame (300).

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