CAP1000 steel containment equipment gate mounting method and reinforcing tool

Abstract

The invention provides a CAP1000 steel containment equipment gate mounting method and a reinforcing tool, and relates to the technical field of nuclear power construction. According to the installation method for the equipment gate of the CAP1000 steel containment, before the installation hole in the cylinder is machined and the equipment gate and the cylinder are welded and installed, the installation position on the cylinder is reinforced by welding a reinforcing tool on the cylinder, the deformation amount of the cylinder is controlled, and therefore the installation deviation is within the related required range, and the installation accuracy is improved. And inconvenience factors of nuclear island installation are avoided. And meanwhile, the reinforcing tool surrounds the periphery of the mounting position, so that the mounting of the equipment gate is not influenced by the arrangement of the reinforcing tool, and the equipment gate does not need to be transformed in the mounting construction process.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power construction, and in particular to a method for installing a gate of a CAP1000 steel containment vessel equipment and a reinforcement tool. Background Art

[0002] In a nuclear power plant, the equipment gate is the inner shielding structure of the reactor building and an important safety barrier of the nuclear power plant. Figure 1 Shows the structure of the existing equipment gate 1, as shown Figure 1 The gate 1 shown in the figure consists of a gate sleeve 2 and an insert plate assembly 3. Typically, the insert plate assembly 3 and gate sleeve 2 are welded together after a ring of modules is installed in the nuclear island. The insert plate assembly weighs approximately three-fifths of the total weight, allowing ample adjustment margin for installing the gate sleeve after the insert plate assembly.

[0003] However, the gate sleeve and insert plate assembly of the equipment gate of the CAP1000 steel containment are supplied as a whole, that is, before the equipment gate is installed to the first ring module, the equipment gate 1 is as follows Figure 1 The overall structure shown here provides limited adjustment margin during installation. Furthermore, the insert plate assembly typically has an outer diameter of 7010mm, and the opening in the cylinder is relatively large. Once this integrated gate is installed on the first-ring module cylinder, installation deviations are difficult to control within design requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a CAP1000 steel containment equipment gate installation method, which can effectively control the deformation of the equipment gate during installation, so that the installation deviation is within the design requirements and avoid the inconvenience of nuclear island installation.

[0005] Another object of the present invention is to provide a reinforcement tool that can effectively control the deformation during the installation of the equipment gate, so that the installation deviation is within the design requirements and avoid inconveniences in the installation of the nuclear island.

[0006] The embodiments of the present invention can be implemented in the following ways:

[0007] A CAP1000 steel containment equipment gate installation method is used for installing the equipment gate on a cylinder; the equipment gate includes a gate sleeve and an insert plate assembly fixedly connected to the outer periphery of the gate sleeve; the CAP1000 steel containment equipment gate installation method includes:

[0008] Determine the installation position of the equipment gate on the cylinder;

[0009] Welding a reinforcement tool to the cylinder; wherein the reinforcement tool is a frame-shaped member, and the welding portion between the reinforcement tool and the cylinder surrounds the installation position;

[0010] Processing a mounting hole at the mounting position of the cylinder to which the reinforcement tooling is welded;

[0011] Installing the equipment gate into the mounting hole, and welding the insert plate assembly to the cylinder;

[0012] After the equipment gate is installed on the cylinder, the reinforcement tooling is removed.

[0013] Optionally, the reinforcement tooling includes a backing plate and a frame; and the step of welding and fixing the reinforcement tooling to the cylinder includes:

[0014] Weld the frame and the backing plate together;

[0015] Welding the backing plate to the cylinder;

[0016] Wherein, the material of the pad is the same as that of the cylinder.

[0017] Optionally, the equipment gate includes an upper gate and a lower gate;

[0018] The steps for determining the installation location of the equipment gate on the cylinder include:

[0019] Determine the installation positions of the upper gate and the lower gate on the cylinder respectively; wherein the installation position of the upper gate is the first installation position, and the installation position of the lower gate is the second installation position;

[0020] The reinforcement tooling includes an upper reinforcement tooling and a lower reinforcement tooling; the steps of welding and fixing the reinforcement tooling on the cylinder include:

[0021] Welding and fixing the upper reinforcement tooling at the periphery of the first installation position;

[0022] The lower reinforcement tooling is fixed by welding at the outer periphery of the second installation position.

[0023] Optionally, the cylinder includes a first ring body, a second ring body, a third ring body, and a fourth ring body connected in sequence from bottom to top, the first ring body and the second ring body are connected to form a lower cylinder body, and the third ring body and the fourth ring body are connected to form an upper cylinder body; the steps of respectively determining the installation positions of the upper gate and the lower gate on the cylinder body include:

[0024] determining the first installation position on the upper cylinder;

[0025] The second installation position is determined on the lower cylinder.

[0026] Optionally, part of the lower gate is located below the lower edge of the cylinder, and the lower reinforcement tooling includes a lower side pull plate;

[0027] The step of welding and fixing the lower reinforcement tooling at the periphery of the second installation position includes:

[0028] The lower side pull plate is welded and fixed to the lower edge through the lower side pad; wherein the upper end of the lower side pad is welded and fixed to the lower edge, and the lower end of the lower side pad is welded and fixed to the lower side pull plate, so that the lower side pull plate is located below the lower edge.

[0029] Optionally, the step of installing the equipment gate into the installation hole includes:

[0030] Installing the lower gate into the mounting hole machined at the second mounting position;

[0031] The steps of removing the reinforcement tooling include:

[0032] removing the lower reinforcement tooling;

[0033] After the step of installing the lower gate into the mounting hole machined at the second mounting position and before the step of removing the lower reinforcement tooling, the CAP1000 steel containment equipment gate installation method further includes:

[0034] The lower gate is heat treated.

[0035] A reinforcement tool is used to weld and fix the equipment gate of a CAP1000 steel containment vessel to the cylinder before the equipment gate is installed on the cylinder to reinforce the cylinder. The cylinder has an installation position for installing the equipment gate. The reinforcement tool comprises:

[0036] An upper pull plate and a lower pull plate, the upper pull plate and the lower pull plate are spaced apart from each other and are in an arc shape that matches the circumferential curvature of the cylinder; and

[0037] A left connecting plate and a right connecting plate, wherein the left connecting plate and the right connecting plate are spaced apart, and the upper and lower ends of the left connecting plate and the upper and lower ends of the right connecting plate are respectively connected to the upper pull plate and the lower pull plate to form the frame-shaped reinforcement tooling;

[0038] Among them, the upper side pull plate is used to be welded and fixed on the cylinder, and is located on the upper side of the installation position; the lower side pull plate is used to be welded and fixed on the cylinder, and is located on the lower side of the installation position; the left connecting plate is used to be welded and fixed on the cylinder, and is located on the left side of the installation position; the right connecting plate is used to be welded and fixed on the cylinder, and is located on the right side of the installation position.

[0039] Optionally, the reinforcement tooling further includes a pad, the material of the pad being the same as that of the cylinder; at least one of the upper side pull plate, the lower side pull plate, the left connecting plate and the right connecting plate is welded and fixed to the cylinder via the pad.

[0040] Optionally, the equipment gate includes a lower gate, the installation position includes a lower installation position for installing the lower gate; a portion of the lower gate is located below the lower edge of the cylinder and is in a suspended state; the reinforcement tooling includes a lower reinforcement tooling for welding around the lower installation position;

[0041] The pad includes a lower pad, the lower end of the lower pad is welded and fixed to the lower pull plate of the lower reinforcement tooling, and the upper end of the lower pad is used to be welded and fixed to the lower edge of the cylinder.

[0042] Optionally, the lower mounting position is used to process a mounting hole, and the mounting hole is used to install the lower gate; an avoidance notch is provided on the lower side pull plate of the lower reinforcement tooling, and the avoidance notch is used to correspond to the position of the mounting hole, so as to avoid the processing position when processing the mounting hole at the lower mounting position.

[0043] Optionally, the left connecting plate and the right connecting plate of the lower reinforcement tooling are made of I-beams.

[0044] Optionally, the reinforcement tooling further includes a support plate; the support plate is welded and fixed below the upper side pull plate to support the upper side pull plate; and / or the support plate is welded and fixed below the lower side pull plate to support the lower side pull plate.

[0045] Optionally, the reinforcement tooling also includes a first rib plate; the two ends of the first rib plate are respectively welded and fixed to the upper side pull plate and the left connecting plate; and / or, the two ends of the first rib plate are respectively welded and fixed to the upper side pull plate and the right connecting plate; and / or, the two ends of the first rib plate are respectively welded and fixed to the lower side pull plate and the left connecting plate; and / or, the two ends of the first rib plate are respectively welded and fixed to the lower side pull plate and the right connecting plate.

[0046] The beneficial effects of the CAP1000 steel containment equipment gate installation method and reinforcement tooling provided by the embodiments of the present invention include:

[0047] An embodiment of the present invention provides a CAP1000 steel containment vessel equipment gate installation method for installing the equipment gate on a cylinder. The equipment gate includes a gate sleeve and an insert plate assembly fixedly connected to the outer periphery of the gate sleeve. The CAP1000 steel containment vessel equipment gate installation method includes: determining the installation position of the equipment gate on the cylinder; welding and fixing a reinforcement tool to the cylinder; wherein the reinforcement tool is a frame-shaped member, and the weld between the reinforcement tool and the cylinder surrounds the installation position; machining a mounting hole at the installation position of the cylinder to which the reinforcement tool is welded; installing the equipment gate into the mounting hole and welding and fixing the insert plate assembly to the cylinder; and after the equipment gate is installed on the cylinder, removing the reinforcement tool. This CAP1000 steel containment equipment gate installation method reinforces the installation position on the cylinder by welding reinforcement tooling on the cylinder before machining the installation holes on the cylinder and welding the equipment gate to the cylinder, thereby controlling the deformation of the cylinder. At the same time, since the reinforcement tooling surrounds the outer periphery of the installation position, the setting of the reinforcement tooling will not affect the installation of the equipment gate, and no modification is required during the equipment gate installation construction process.

[0048] An embodiment of the present invention further provides a reinforcement fixture, which is used to weld and fix the equipment gate of the CAP1000 steel containment vessel to the cylinder before it is installed, thereby reinforcing the cylinder. The reinforcement fixture is a square frame structure formed by connecting the upper pull plate, the left connecting plate, the lower pull plate, and the right connecting plate end to end. The upper pull plate is used to weld and fix it to the upper side of the cylinder's installation location, the lower pull plate is used to weld and fix it to the lower side of the cylinder's installation location, the left connecting plate is used to weld and fix it to the left side of the cylinder's installation location, and the right connecting plate is used to weld and fix it to the right side of the cylinder's installation location. In this way, the reinforcement fixture strengthens the cylinder and controls the deformation of the cylinder during the opening and welding processes without affecting the installation of the equipment gate. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The above features and advantages of the present invention will be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or characteristics may have the same or similar reference numerals.

[0050] Figure 1 Shows the structural diagram of the current equipment gate;

[0051] Figure 2 A schematic diagram showing the position of a device gate on a cylinder according to one aspect of the present invention is shown;

[0052] Figure 3A schematic diagram showing the positions of the upper reinforcement tooling and the upper gate provided according to one aspect of the present invention is shown;

[0053] Figure 4 A schematic diagram showing the positions of the lower reinforcement tooling and the lower gate provided according to one aspect of the present invention is shown;

[0054] Figure 5 A schematic structural diagram of an upper side pull plate of a reinforcement tool provided according to one aspect of the present invention is shown;

[0055] Figure 6 A schematic structural diagram of a support plate in a reinforcement tool provided according to one aspect of the present invention is shown;

[0056] Figure 7 A schematic structural diagram of a lower side pull plate of an upper reinforcement tooling provided according to one aspect of the present invention is shown;

[0057] Figure 8 A schematic structural diagram of a lower side pull plate of a lower side reinforcement tooling provided according to one aspect of the present invention is shown;

[0058] Figure 9 A step diagram of a method for installing a CAP1000 steel containment vessel gate according to one aspect of the present invention is shown.

[0059] Reference numerals:

[0060] 1-Equipment gate; 2-Gate sleeve; 3-Insert plate assembly;

[0061] 100 - reinforcement tooling; 111 - upper side pull plate; 112 - lower side pull plate; 113 - left connecting plate; 114 - right connecting plate; 115 - pad; 116 - first rib plate; 117 - support plate; 120 - upper reinforcement tooling; 121 - second rib plate; 130 - lower reinforcement tooling; 131 - avoidance gap; 132 - lower side pad;

[0062] 200 - cylinder; 210 - upper cylinder; 211 - third ring; 212 - fourth ring; 213 - first installation position; 215 - stiffening rib; 220 - lower cylinder; 221 - first ring; 222 - second ring; 223 - second installation position;

[0063] 311-upper gate; 312-lower gate. DETAILED DESCRIPTION

[0064] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Note that the various aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention.

[0065] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inner", "outer", "vertical" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0066] At the same time, it should be noted that the terms "first", "second", etc. are only used to distinguish and describe, and cannot be understood as indicating or implying relative importance.

[0067] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connection, integral connection, or detachable connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0068] Figure 2 Schematic diagram showing the position of the device gate provided in this embodiment on the cylinder 200, Figure 3 Schematic diagram showing the positions of the upper reinforcement tooling 120 and the upper gate 311 provided in this embodiment, Figure 4 The schematic diagram of the position of the lower reinforcement tool 130 and the lower gate 312 provided in this embodiment is shown. Figure 1-Figure 4 This embodiment provides a reinforcement tool 100. Before the equipment gate of the CAP1000 steel containment vessel is installed on the cylinder 200, the reinforcement tool 100 is welded and fixed to the cylinder 200, thereby reinforcing the cylinder 200 and controlling the deformation of the cylinder 200. Specifically, the equipment gate includes a gate sleeve and an insert plate assembly that are interconnected. The insert plate assembly is annular and is sleeved on the outer circumference of the gate sleeve. The cylinder 200 has an installation position for installing the equipment gate. Before the equipment gate is installed, a mounting hole is machined at the installation position. When the equipment gate is installed, the gate sleeve is inserted into the mounting hole, and the insert plate assembly is welded and fixed to the cylinder 200. Therefore, in the description of this embodiment, the "installation position" on the cylinder 200 can also be regarded as the position where the mounting hole is opened and the position of the outer contour of the insert plate assembly after the equipment gate is installed on the cylinder 200.

[0069] Figure 5 The structural diagram of the upper side pull plate 111 of the reinforcement tool 100 provided in this embodiment is shown. Figures 1 to 5In this embodiment, the reinforcement tooling 100 includes an upper side pull plate 111, a lower side pull plate 112, a left connecting plate 113 and a right connecting plate 114. The upper side pull plate 111 and the lower side pull plate 112 are spaced apart in the upper and lower directions, and the left connecting plate 113 and the right connecting plate 114 are spaced apart in the upper and lower directions. The upper and lower ends of the left connecting plate 113 are respectively connected to the upper side pull plate 111 and the lower side pull plate 112, and the upper and lower ends of the right connecting plate 114 are respectively connected to the upper side pull plate 111 and the lower side pull plate 112. In this way, the upper side pull plate 111, the left connecting plate 113, the lower side pull plate 112 and the right connecting plate 114 are connected end to end to form the frame of the reinforcement tooling 100. Accordingly, the reinforcement tooling 100 is in the shape of a square frame. When the reinforcement tooling 100 is welded and fixed on the cylinder 200, the upper pull plate 111 is welded and fixed on the upper side of the installation position of the cylinder 200, the lower pull plate 112 is welded and fixed on the lower side of the installation position of the cylinder 200, the left connecting plate 113 is welded and fixed on the left side of the installation position of the cylinder 200, and the right connecting plate 114 is welded and fixed on the right side of the installation position of the cylinder 200.

[0070] Specifically, the cylinder 200 is a cylindrical structure, and the upper side pull plate 111 and the lower side pull plate 112 distributed above and below extend along the circumference of the cylinder 200. Therefore, the upper side pull plate 111 and the lower side pull plate 112 are in an arc shape that matches the circumference of the cylinder 200 (such as Figure 5 As shown in FIG. 1 , the left connecting plate 113 and the right connecting plate 114 extend along the axial direction of the cylinder 200 , and thus the left connecting plate 113 and the right connecting plate 114 can be configured as a linear structure.

[0071] Furthermore, the reinforcement tool 100 further includes a backing plate 115. The material of the backing plate 115 is the same as that of the cylinder 200. At least one of the upper pull plate 111, the lower pull plate 112, the left connecting plate 113, and the right connecting plate 114 is welded and fixed to the cylinder 200 via the backing plate 115. Specifically, in this embodiment, the upper pull plate 111, the lower pull plate 112, the left connecting plate 113, and the right connecting plate 114 are all welded and fixed to the cylinder 200 via the backing plate 115, that is, the backing plate 115 is directly welded and fixed to the cylinder 200, and the upper connecting plate, the lower connecting plate, the left connecting plate 113, and the right connecting plate 114 are all directly welded to the backing plate 115, thereby achieving a fixed connection with the cylinder 200 via the backing plate 115. Since the material of the pad 115 is the same as that of the cylinder 200, the upper side pull plate 111, the lower side pull plate 112, the left connecting plate 113 and the right connecting plate 114 can all be made of materials different from the material of the cylinder 200, thereby reducing the cost of the reinforcement tool 100. It can be understood that in other embodiments, only part of the upper side pull plate 111, the lower side pull plate 112, the left connecting plate 113 and the right connecting plate 114 can be set to be welded and fixed to the cylinder 200 through the pad 115.

[0072] Optionally, in this embodiment, the material of the backing plate 115 is SA738GrB, and the material of other parts of the reinforcement tool 100 is Q235B.

[0073] Furthermore, the backing plate 115 includes a plurality of blocks, which are spaced apart along the outline of the frame formed by the upper pull plate 111, the lower pull plate 112, the left connecting plate 113, and the right connecting plate 114. This helps reduce the material used for the backing plate 115, further reducing costs, and can also reduce the welding area between the reinforcement tool 100 and the cylinder 200. Specifically, when welding the blocks to the cylinder 200, at least the two opposing sides of the blocks are welded to the cylinder 200.

[0074] Figure 6 The structural diagram of the support plate 117 in the reinforcement tool 100 provided in this embodiment is shown. Figures 1-6 In this embodiment, the reinforcement tool 100 further includes a support plate 117. The support plate 117 is welded and fixed below the upper side pull plate 111 to support the upper side pull plate 111; and / or, the support plate 117 is welded and fixed below the lower side pull plate 112 to support the lower side pull plate 112.

[0075] Specifically, in this embodiment, the support plate 117 is a right-angled trapezoidal plate-shaped member, and its right-angled side connecting the upper bottom and the lower bottom is welded and fixed to the lower plate surface of the upper side pull plate 111 or the lower plate surface of the lower side pull plate 112.

[0076] In this embodiment, the equipment gate includes an upper gate 311 and a lower gate 312. The installation positions on the cylinder 200 include a first installation position 213 and a second installation position 223. The first installation position 213 is the position on the cylinder 200 for installing the upper gate 311, and the second installation position 223 is the position on the cylinder 200 for installing the lower gate 312. Specifically, the cylinder 200 includes a first ring body 221, a second ring body 222, a third ring body 211, and a fourth ring body 212, which are connected in sequence from bottom to top. The third circle body 211 and the fourth circle body 212 are connected to form the upper cylinder body 210, the first installation position 213 is located at the upper cylinder body 210, and part of the first installation position 213 is located at the third circle body 211, and another part of the first installation position 213 is located at the fourth circle body 212; the first circle body 221 and the second circle body 222 are connected to form the lower cylinder body 220, the second installation position 223 is located at the lower cylinder body 220, and part of the second installation position 223 is located at the first circle body 221, and another part of the second installation position 223 is located at the second circle body 222.

[0077] Correspondingly, the reinforcement tooling 100 includes an upper reinforcement tooling 120 and a lower reinforcement tooling 130. The upper reinforcement tooling 120 is used to be welded and fixed outside the first installation position 213, thereby reinforcing the upper cylinder 210 to reduce deformation and other problems that occur during the installation of the upper gate 311; the lower reinforcement tooling 130 is used to be welded and fixed outside the second installation position 223, thereby reinforcing the lower cylinder 220 to reduce deformation and other problems that occur during the installation of the lower gate 312.

[0078] Figure 7 The schematic diagram of the structure of the lower side pull plate 112 of the upper reinforcement tool 120 provided in this embodiment is shown. Figure 3 、 Figure 5 and Figure 7 In this embodiment, a ring of stiffening ribs 215 is installed on the third ring body 211. This ring of stiffening ribs 215 is formed by welding multiple sections of stiffening ribs 215 fixed to the third ring body 211 and then splicing them together. The axial position of the stiffening ribs 215 in the third ring body 211 partially overlaps with the first installation position 213. Therefore, to avoid interference between the upper reinforcement fixture 120 and the position of the stiffening ribs 215, the section of stiffening ribs 215 directly opposite the first installation position 213 is delayed during the welding of the stiffening ribs 215. This section of stiffening ribs 215 is installed after the upper gate 311 is installed and the upper reinforcement fixture 120 is removed.

[0079] At the same time, a position for a stiffening rib 215 is reserved on the upper reinforcement fixture 120 to avoid another stiffening rib 215 on the side. By configuring the structure of the upper reinforcement fixture 120, only one section of the stiffening rib 215 needs to be installed later, ensuring the stiffening effect of the stiffening rib 215 on the cylinder 200. Specifically, the lower end of the right connecting plate 114 of the upper reinforcement fixture 120 is cut off, and the right end of the lower side pull plate 112 of the upper reinforcement fixture 120 is cut off. The right connecting plate 114 and the lower side pull plate 112 are not directly connected, thereby reserving some space at the lower right corner of the upper reinforcement fixture 120 to avoid the stiffening rib 215. Specifically, the lower end of the right connecting plate 114 is connected to the right end of the lower pull plate 112 via a second rib plate 121 . The second rib plate 121 is a strip plate that is tilted relative to the right connecting plate 114 and the lower pull plate 112 .

[0080] It should be noted that in this embodiment, after the installation of a section of stiffening ribs 215 that is opposite to the first installation position 213 is delayed, there is an interference problem between the lower right corner of the upper reinforcement tooling 120 and the installed stiffening ribs 215. Therefore, a structural setting is made at the lower right corner of the upper reinforcement tooling 120 to avoid the stiffening ribs 215. It can be understood that in some other embodiments, if the interference position between the installed stiffening ribs 215 and the upper reinforcement tooling 120 is in the lower left corner, a structural setting can also be made at the lower left corner of the upper reinforcement tooling 120 to avoid the stiffening ribs 215.

[0081] In this embodiment, the reinforcement tooling 100 further includes a first rib plate 116. Specifically, the first rib plate 116 is a plate-like member connected between the pull plate and the connecting plate and arranged obliquely. In the upper reinforcement tooling 120, there are four first rib plates 116, the two ends of one of the first rib plates 116 are respectively welded and fixed to the upper pull plate 111 and the left connecting plate 113, the two ends of one of the first rib plates 116 are respectively welded and fixed to the upper pull plate 111 and the right connecting plate 114, the two ends of one of the first rib plates 116 are respectively welded and fixed to the lower pull plate 112 and the left connecting plate 113, and the two ends of the remaining first rib plate 116 are respectively welded and fixed to the lower pull plate 112 and the right connecting plate 114.

[0082] In this embodiment, support plates 117 are provided below the upper side plate 111 and below the lower side plate 112 of the upper reinforcement tooling 120. Specifically, two support plates 117 are spaced apart on the upper side plate 111. These two support plates 117 are located outside the first ribs 116 of the upper side plate 111. Specifically, the support plate 117 on the left side of the upper side plate 111 is located on the side of the first rib 116 on the left side of the upper side plate 111, close to the left end of the upper side plate 111, and the support plate 117 on the right side of the upper side plate 111 is located on the side of the first rib 116 on the right side of the upper side plate 111, close to the right end of the upper side plate 111. Two support plates 117 are spaced apart on the lower side plate 112. The connection between these two support plates 117 and the lower side plate 112 is located between the welding points between the lower side plate 112 and the two first ribs 116, and are symmetrically distributed about the vertical axis of the upper gate 311.

[0083] Figure 8 The schematic diagram of the structure of the lower side pull plate 112 of the lower side reinforcement tool 100 provided in this embodiment is shown. Figure 4 、 Figure 5 and Figure 8The lower mounting position is used to machine a mounting hole for mounting the lower gate 312, which is the second mounting hole. In this embodiment, part of the lower gate 312 is located below the lower edge of the cylinder 200 and is in a suspended state, so the second mounting hole is arched. Specifically, the arch is a figure formed by connecting a circular arc and a chord (i.e., a straight line that does not pass through the center of the circle). Therefore, the height of the lower reinforcement tooling 130 can be set to be slightly smaller than the radial dimension of the lower gate 312. The lower side pull plate 112 of the lower reinforcement tooling 130 is welded and fixed to the lower edge of the cylinder 200 by a pad 115.

[0084] Specifically, the backing plate 115 connecting the lower side plate 112 of the lower reinforcement fixture 130 and the lower edge of the cylinder 200 is the lower backing plate 132. The lower end of the lower backing plate 132 is welded to the lower side plate 112 of the lower reinforcement fixture 130, while the upper end of the lower backing plate 132 is welded to the lower edge of the cylinder 200. This ensures that the lower side plate 112 of the lower reinforcement fixture 130 is effectively reinforced on the lower cylinder 220 while allowing the lower side plate 112 of the lower reinforcement fixture 130 to be positioned lower than the lower edge of the cylinder 200. This allows the lower backing plate 132 to be a longer plate-like member than the backing plates 115 in other locations. Furthermore, only the left and right ends of the lower side plate 112 are welded to the cylinder 200, leaving the middle portion of the lower side plate 112 unconnected to the cylinder 200.

[0085] Furthermore, the lower side pull plate 112 of the lower reinforcement fixture 130 is provided with an escape notch 131. This escape notch 131 is designed to correspond to the position of the mounting hole on the lower cylinder 220. After the lower reinforcement fixture 130 is welded and fixed to the cylinder 200, the escape notch 131 can be used to avoid the machining position when the mounting hole is machined at the lower mounting location. This prevents the lower side pull plate 112 from being locally heated and breaking during high-temperature drilling. Specifically, the escape notch 131 is a semicircular notch with a radius of 50 mm. Two escape notches 131 are provided on the lower side pull plate 112 of the lower reinforcement fixture 130.

[0086] In this embodiment, first ribs 116 are provided between the upper pull plate 111 and the left connecting plate 113, and between the upper pull plate 111 and the right connecting plate 114, in the lower reinforcement fixture 130. No first ribs 116 are provided on the lower pull plate 112. In other words, the number of first ribs 116 in the lower reinforcement fixture 130 is two. It is understood that in other embodiments, the number and position of first ribs 116 in the reinforcement fixture 100 may be specifically adjusted as needed. Furthermore, in the lower reinforcement fixture 130, a support plate 117 is provided below the upper pull plate 111, but no support plate 117 is provided below the lower pull plate 112.

[0087] Furthermore, in the lower reinforcement tooling 130 , the left connecting plate 113 and the right connecting plate 114 are made of I-beams. Compared with flat plate parts, the use of I-beams can effectively control the tension in the direction of gravity.

[0088] Figure 9 The figure shows the steps of the CAP1000 steel containment equipment gate installation method provided in this embodiment. Figure 9 Embodiments of the present invention also provide a method for installing a CAP1000 steel containment vessel equipment gate. Prior to machining the mounting holes on the cylinder 200 and welding the equipment gate to the cylinder 200, this method reinforces the installation location on the cylinder 200 by welding a reinforcement tool 100 thereon, thereby controlling deformation of the cylinder 200. The reinforcement tool 100 can be the aforementioned reinforcement tool 100. Because the reinforcement tool 100 surrounds the periphery of the installation location, its installation does not affect the installation of the equipment gate, eliminating the need for modifications during the equipment gate installation process.

[0089] The specific steps of the CAP1000 steel containment equipment gate installation method provided in this embodiment include:

[0090] S01: Determine the installation position of the equipment gate on the cylinder 200.

[0091] The installation positions of the equipment gates are determined on the cylinder 200 by laying out lines or other methods. Optionally, in this embodiment, the equipment gates include an upper gate 311 and a lower gate 312. Accordingly, the installation positions include an installation position for the upper gate 311 and an installation position for the lower gate 312. Thus, step S01 specifically includes: determining the installation positions of the upper gate 311 and the lower gate 312 on the cylinder 200, respectively. The installation position of the upper gate 311 is the first installation position 213, and the installation position of the lower gate 312 is the second installation position 223.

[0092] S02: Weld and fix the reinforcement tool 100 to the cylinder 200.

[0093] The reinforcement tool 100 is fixed to the cylinder 200 by welding. Specifically, in order to reduce the cost of the reinforcement tool 100 and the welding area of ​​the cylinder 200 and ensure the welding effect, the reinforcement tool 100 includes a pad 115 and a frame. The frame is welded to the cylinder 200 by the pad 115. The pad 115 and the cylinder 200 are made of the same material, while the frame can be made of a different material from the cylinder 200. Therefore, when executing step S02, it includes:

[0094] S21: Weld and fix the frame and the backing plate 115.

[0095] S22: Weld and fix the backing plate 115 to the cylinder 200.

[0096] It should be noted that the execution order of step 21 and step S22 is not restricted here. It can be understood that when welding the reinforcement tooling 100, the pad 115 can be welded to the cylinder 200 first, and then the frame and the pad 115 on the cylinder 200 can be welded and fixed. Alternatively, the pad 115 can be welded to the frame first to form a complete reinforcement tooling 100, and then the pad 115 and the cylinder 200 can be welded, thereby realizing the welding and fixation of the reinforced winter clothing and the cylinder 200.

[0097] In this embodiment, the equipment gate includes an upper gate 311 and a lower gate 312. Correspondingly, the reinforcement tool 100 includes an upper reinforcement tool 120 and a lower reinforcement tool 130. Therefore, step S02 further includes:

[0098] S23 : Welding and fixing the upper reinforcement tool 120 at the periphery of the first installation position 213 .

[0099] S24 : Welding and fixing the lower reinforcement tooling 130 at the periphery of the second installation position 223 .

[0100] The cylinder 200 includes a first circle 221, a second circle 222, a third circle 211 and a fourth circle 212 connected from bottom to top. The first circle 221 and the second circle 222 are connected to form the lower cylinder 220, and the third circle 211 and the fourth circle 212 are connected to form the upper cylinder 210.

[0101] The first installation position 213 is located at the upper cylinder 210 , and the second installation position 223 is located at the lower cylinder 220 . Accordingly, step S23 specifically involves welding and fixing the upper reinforcement tooling 120 to the upper cylinder 210 , and step S24 specifically involves welding and fixing the lower reinforcement tooling 130 to the lower cylinder 220 . At the same time, since the upper cylinder 210 and the lower cylinder 220 are connected by welding the upper end of the second circle 222 to the lower end of the third circle 211, the execution order of welding the upper reinforcement tooling 120 on the upper cylinder 210, welding the lower reinforcement tooling 130 on the lower cylinder 220, and welding the upper cylinder 210 and the lower cylinder 220 to form the cylinder 200 can be selected according to needs. For example, the upper reinforcement tooling 120 is first welded to the upper cylinder 210, the lower reinforcement tooling 130 is welded to the lower cylinder 220, and then the upper cylinder 210 and the lower cylinder 220 are welded and fixed; or, the upper cylinder 210 and the lower cylinder 220 are first welded and fixed, and then the upper reinforcement tooling 120 and the lower reinforcement tooling 130 are welded to the cylinder 200.

[0102] Furthermore, the welding of the upper cylinder 210 and the lower cylinder 220 can also be performed after the equipment gate is installed.

[0103] In this embodiment, step S24 specifically includes:

[0104] The lower side pull plate 112 of the lower reinforcement tool 130 is welded and fixed to the lower edge of the cylinder 200 through the lower side pad 132. After welding and fixing, the lower side pull plate 112 is located below the lower edge.

[0105] S03: Processing a mounting hole at the mounting position of the cylinder 200 to which the reinforcement tool 100 is welded.

[0106] Mounting holes can be machined at the mounting locations by methods such as thermal cutting, thereby facilitating subsequent equipment gate installation. Furthermore, since the mounting locations include a first mounting location 213 and a second mounting location 223, the mounting holes accordingly include a first mounting hole machined at the first mounting location 213 and a second mounting hole machined at the second mounting location 223.

[0107] S04: Install the equipment gate into the installation hole, and weld and fix the insert plate assembly to the cylinder 200.

[0108] Insert the gate sleeve of the upper gate 311 into the first mounting hole until the insert plate assembly of the upper gate 311 contacts the surface of the cylinder 200, and then weld the insert plate assembly of the upper gate 311 to the upper cylinder 210 by welding, thereby achieving the installation of the upper gate 311.

[0109] Insert the gate sleeve of the lower gate 312 into the second mounting hole until the insert plate assembly of the lower gate 312 contacts the surface of the cylinder 200, and then weld the insert plate assembly of the lower gate 312 to the lower cylinder 220 by welding, thereby completing the installation of the lower gate 312.

[0110] S05: After the equipment gate is installed on the cylinder 200, the reinforcement tooling 100 is removed.

[0111] After the upper gate 311 is installed on the cylinder 200, the upper reinforcement fixture 120 is removed. After the lower gate 312 is installed on the cylinder 200, the lower reinforcement fixture 130 is removed. Furthermore, after welding the lower gate 312 to the cylinder 200 and before removing the lower reinforcement fixture 130, the CAP1000 steel containment vessel gate installation method further includes heat treating the lower gate 312.

[0112] The CAP1000 steel containment equipment gate installation method and reinforcement tooling 100 provided in an embodiment of the present invention, through the reinforcement of the cylinder 200 by the reinforcement tooling 100, effectively reduces the technical problem of large deformation of the cylinder 200 due to factors such as large-sized openings, welding deformation, and heat treatment deformation, and difficulty in controlling the deviation of the equipment gate within the design requirements after installation when the equipment gate is installed at the assembly site. At the same time, the equipment gate and the cylinder 200 are installed before hoisting, so that the overall hoisting installation of a ring module can be achieved after the equipment gate is installed to the cylinder 200, thereby helping to shorten the construction period and improve economic benefits.

[0113] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in this field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A method for installing a CAP1000 steel containment equipment gate on a cylinder; the equipment gate comprises a gate sleeve and an insert plate assembly fixedly connected to the outer periphery of the gate sleeve; characterized in that: The CAP1000 steel containment equipment gate installation method includes: Determine the installation position of the equipment gate on the cylinder; Welding a reinforcement tool to the cylinder; wherein the reinforcement tool is a frame-shaped member, and the welding portion between the reinforcement tool and the cylinder surrounds the installation position; Processing a mounting hole at the mounting position of the cylinder to which the reinforcement tooling is welded; Installing the equipment gate into the mounting hole, and welding the insert plate assembly to the cylinder; After the equipment gate is installed on the cylinder, the reinforcement tooling is removed.

2. The CAP1000 steel containment equipment gate installation method according to claim 1 is characterized in that: The reinforcement tooling includes a pad and a frame; the steps of welding and fixing the reinforcement tooling to the cylinder include: Weld the frame and the backing plate together; Welding the backing plate to the cylinder; Wherein, the material of the pad is the same as that of the cylinder.

3. The CAP1000 steel containment equipment gate installation method according to claim 1 is characterized in that: The equipment gate includes an upper gate and a lower gate; The steps for determining the installation location of the equipment gate on the cylinder include: Determine the installation positions of the upper gate and the lower gate on the cylinder respectively; wherein the installation position of the upper gate is the first installation position, and the installation position of the lower gate is the second installation position; The reinforcement tooling includes an upper reinforcement tooling and a lower reinforcement tooling; the steps of welding and fixing the reinforcement tooling on the cylinder include: Welding and fixing the upper reinforcement tooling at the periphery of the first installation position; The lower reinforcement tooling is fixed by welding at the outer periphery of the second installation position.

4. The CAP1000 steel containment equipment gate installation method according to claim 3 is characterized in that: The cylinder includes a first ring body, a second ring body, a third ring body and a fourth ring body connected in sequence from bottom to top, the first ring body and the second ring body are connected to form a lower cylinder body, and the third ring body and the fourth ring body are connected to form an upper cylinder body; The steps of respectively determining the installation positions of the upper gate and the lower gate on the cylinder include: determining the first installation position on the upper cylinder; The second installation position is determined on the lower cylinder.

5. The CAP1000 steel containment equipment gate installation method according to claim 3 is characterized in that: The lower gate portion is located below the lower edge of the cylinder, and the lower reinforcement tooling includes a lower side pull plate; The step of welding and fixing the lower reinforcement tooling at the periphery of the second installation position includes: The lower side pull plate is welded and fixed to the lower edge through the lower side pad; wherein the upper end of the lower side pad is welded and fixed to the lower edge, and the lower end of the lower side pad is welded and fixed to the lower side pull plate, so that the lower side pull plate is located below the lower edge.

6. The CAP1000 steel containment equipment gate installation method according to claim 3 is characterized in that: The steps of installing the equipment gate into the mounting hole include: Installing the lower gate into the mounting hole machined at the second mounting position; The steps of removing the reinforcement tooling include: removing the lower reinforcement tooling; After the step of installing the lower gate into the mounting hole machined at the second mounting position and before the step of removing the lower reinforcement tooling, the CAP1000 steel containment equipment gate installation method further includes: The lower gate is heat treated.

7. A reinforcement tool, characterized in that: The reinforcement tool is used to weld and fix the equipment gate of the CAP1000 steel containment vessel to the cylinder before it is installed to reinforce the cylinder. The cylinder has an installation position for installing the equipment gate. The reinforcement tool includes: An upper pull plate and a lower pull plate, the upper pull plate and the lower pull plate are spaced apart from each other and are in an arc shape that matches the circumferential curvature of the cylinder; and A left connecting plate and a right connecting plate, wherein the left connecting plate and the right connecting plate are spaced apart, and the upper and lower ends of the left connecting plate and the upper and lower ends of the right connecting plate are respectively connected to the upper pull plate and the lower pull plate to form the frame-shaped reinforcement tooling; Among them, the upper side pull plate is used to be welded and fixed on the cylinder, and is located on the upper side of the installation position; the lower side pull plate is used to be welded and fixed on the cylinder, and is located on the lower side of the installation position; the left connecting plate is used to be welded and fixed on the cylinder, and is located on the left side of the installation position; the right connecting plate is used to be welded and fixed on the cylinder, and is located on the right side of the installation position.

8. The reinforcement tool according to claim 7, characterized in that: The reinforcement tooling further includes a pad, the material of which is the same as that of the cylinder; at least one of the upper pull plate, the lower pull plate, the left connecting plate and the right connecting plate is welded and fixed to the cylinder via the pad.

9. The reinforcement tool according to claim 8, characterized in that: The equipment gate includes a lower gate, and the installation position includes a lower installation position for installing the lower gate; a portion of the lower gate is located below the lower edge of the cylinder and is in a suspended state; the reinforcement tooling includes a lower reinforcement tooling for welding around the lower installation position; The pad includes a lower pad, the lower end of the lower pad is welded and fixed to the lower pull plate of the lower reinforcement tooling, and the upper end of the lower pad is used to be welded and fixed to the lower edge of the cylinder.

10. The reinforcement tool according to claim 9, characterized in that: The lower installation position is used for processing the installation hole, and the installation hole is used to install the lower gate; an avoidance notch is provided on the lower side pull plate of the lower reinforcement tooling, and the avoidance notch is used to correspond to the position of the installation hole, so as to avoid the processing position when processing the installation hole at the lower installation position.

11. The reinforcement tool according to claim 9, characterized in that: The left connecting plate and the right connecting plate of the lower reinforcing tooling are made of I-beams.

12. The reinforcement tool according to claim 7, characterized in that: The reinforcement tooling further includes a support plate; the support plate is welded and fixed below the upper side pull plate to support the upper side pull plate; and / or the support plate is welded and fixed below the lower side pull plate to support the lower side pull plate.

13. The reinforcement tool according to claim 7, characterized in that: The reinforcement tooling also includes a first rib plate; the two ends of the first rib plate are respectively welded and fixed to the upper side pull plate and the left connecting plate; and / or, the two ends of the first rib plate are respectively welded and fixed to the upper side pull plate and the right connecting plate; and / or, the two ends of the first rib plate are respectively welded and fixed to the lower side pull plate and the left connecting plate; and / or, the two ends of the first rib plate are respectively welded and fixed to the lower side pull plate and the right connecting plate.

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