Lifting device in manufacturing process of pressure stabilizer end socket

Abstract

The utility model discloses a hoisting device in the manufacturing process of a pressure stabilizer end socket, which comprises an upper annular plate (1), a barrel (2), a lower annular plate (3), a plurality of lifting lugs (4) and a connecting piece (5), the upper annular plate (1) is fixedly connected with the periphery of the top of the barrel (2), the lower annular plate (3) is fixedly connected with the periphery of the bottom of the barrel (2), the plane where the upper annular plate (1) is located is parallel to the plane where the lower annular plate (3) is located, and the connecting piece (5) is connected with the lifting lugs (4). A plurality of lifting lugs (4) are evenly arranged on the side, close to the upper annular plate (1), of the outer wall of the barrel (2) in the circumferential direction, the upper annular plate (1) is connected and fastened with a process annular plate of a pressure stabilizer end socket (6) through a connecting piece (5), the size of the upper annular plate (1) is consistent with that of the process annular plate of the pressure stabilizer end socket (6), and the diameter of the barrel (2) is larger than that of the pressure stabilizer end socket (6).

Description

Technical Field

[0001] The utility model belongs to the technical field of nuclear power, and particularly relates to a lifting device for manufacturing a pressurizer head. Background Art

[0002] The "Hualong One" third-generation million-kilowatt pressurized water reactor nuclear power technology independently developed in China, in which the pressurizer is one of the main equipment of the reactor coolant system. The safety class of the pressurizer is Class 1, and the equipment is a vertical cylindrical high-temperature (360 °C), high-pressure (17.23 MPa) container.

[0003] The pressurizer is assembled and welded by a cylinder assembly, an upper head assembly, a lower head assembly, a support skirt assembly, etc., and an austenitic stainless steel surfacing layer is surfacing-welded on the surface of the container in contact with the reactor coolant.

[0004] The pressurizer head is spherical. The head completes processes such as preheating, welding, hydrogen elimination, and grinding by rotating on a positioner, so as to ensure the welding quality of the final equipment. When the pressurizer head needs to be hoisted during welding, the current lifting device is not compatible with the pressurizer, cannot meet the hoisting requirements of the pressurizer, and there is not enough space to install the pressurizer head and the insulation belt. Therefore, it is very necessary to make a lifting device for the pressurizer head. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art, and provides a lifting device for manufacturing a pressurizer head.

[0006] In order to solve the technical problems, the technical method of the utility model is: a lifting device for manufacturing a pressurizer head, including an upper ring plate, a cylinder body, a lower ring plate, lifting lugs and connecting pieces. The upper ring plate is fixedly connected to the periphery of the top of the cylinder body, the lower ring plate is fixedly connected to the periphery of the bottom of the cylinder body, the planes where the upper ring plate and the lower ring plate are located are parallel, the lifting lugs are multiple, and the multiple lifting lugs are evenly arranged on the circumferential direction of the outer wall of the cylinder body close to one side of the upper ring plate. The upper ring plate and the process ring plate of the pressurizer head are connected and fastened through the connecting piece, the upper ring plate and the process ring plate of the pressurizer head have the same size, and the diameter of the cylinder body is larger than the diameter of the pressurizer head.

[0007] Preferably, the upper ring plate is an annular plate, the inner circle of the upper ring plate is welded to the periphery of the top of the cylinder body as a whole, the plane where the upper ring plate is located is perpendicular to the axis of the cylinder body, and a plurality of connection holes are opened on the upper ring plate. The positions of the plurality of connection holes on the upper ring plate correspond to the positions of the plurality of connection holes on the process ring plate of the pressurizer head.

[0008] Preferably, the lower ring plate is an annular plate, the inner circle of the lower ring plate is welded to the periphery of the bottom of the cylinder body as a whole, and the plane where the lower ring plate is located is perpendicular to the axis of the cylinder body.

[0009] Preferably, a rectangular hole is formed in the side wall of the cylinder body. The rectangular hole is used for installing and fixing the heat preservation belt on the pressure stabilizer head. A reinforcing rib plate is further arranged on the side wall of the cylinder body, and the reinforcing rib plate is welded to the side wall of the cylinder body as a whole.

[0010] Preferably, the connecting piece includes a bolt and a nut. The bolt passes through the connecting holes on the process ring plate of the pressure stabilizer head and the connecting holes on the upper ring plate at the corresponding position and is fastened to the nut, so that the upper ring plate and the pressure stabilizer head are fixedly connected.

[0011] Preferably, the outer diameter of the upper ring plate and the lower ring plate is φ3120mm, the inner diameter is Φ2720mm, and the thickness is 30mm. The inner diameter of the cylinder body is Φ2720, the thickness is 20mm, and the height is 2000mm.

[0012] Preferably, there are 6 reinforcing rib plates, and the 6 reinforcing rib plates are evenly distributed on the side wall of the cylinder body. The size of the reinforcing rib plate is 1940×200×20mm.

[0013] Compared with the prior art, the advantages of the present utility model are as follows:

[0014] (1) The present utility model discloses a lifting device in the manufacturing process of a pressure stabilizer head. The lifting device ensures that there is enough space to install the pressure stabilizer head and the heating belt, and at the same time controls the total weight, saves the manufacturing space, and ensures that the pressure stabilizer head can be smoothly and stably rotated when installed on the positioner.

[0015] (2) In order to facilitate centering, the outer circles of the upper ring plate and the process ring plate of the pressure stabilizer head are processed to be the same in the lifting device of the present utility model. After the upper ring plate and the pressure stabilizer head are connected, it can be ensured that the lifting device is concentric with the pressure stabilizer head. Then, the lifting device is aligned with the positioner to ensure that the pressure stabilizer head is concentric with the positioner during rotation, thereby improving the quality of the pressure stabilizer.

[0016] (3) The structure of the lifting device of the present utility model is simply designed, does not change the structure of the original equipment, is easy to install, and has a reasonable and compact structure. The functionality of this lifting device meets the lifting requirements of the pressure stabilizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 、Schematic diagram of the structure of a lifting device in the manufacturing process of a pressure stabilizer head of the present utility model.

[0018] Description of the reference numerals:

[0019] 1. Upper ring plate, 2. Cylinder body, 3. Lower ring plate, 4. Lifting lug, 5. Connecting piece, 6. Pressure stabilizer head, 7. Heat preservation belt;

[0020] 2-1. Rectangular hole;

[0021] 5-1. Bolt, 5-2. Nut. Detailed implementation manners

[0022] The following describes the specific implementation manners of the present utility model in conjunction with embodiments:

[0023] It should be noted that the content shown in the drawings of this specification is only used to cooperate with the principles, features and content described in the specification for those familiar with this technology to understand and read, and is not used to limit the implementable conditions of the present utility model. Without affecting the effects that the present utility model can produce and the purposes that can be achieved, it should still fall within the scope covered by the technical content disclosed by the present utility model.

[0024] Embodiment 1

[0025] As Figure 1 shown, the present utility model discloses a lifting device during the manufacturing process of a pressure stabilizer head, including an upper ring plate 1, a cylinder body 2, a lower ring plate 3, lifting lugs 4 and a connecting member 5. The upper ring plate 1 is fixedly connected to the periphery of the top of the cylinder body 2, and the lower ring plate 3 is fixedly connected to the periphery of the bottom of the cylinder body 2. The planes where the upper ring plate 1 and the lower ring plate 3 are located are parallel. The lifting lugs 4 are multiple, and the multiple lifting lugs 4 are evenly arranged on the outer wall of the cylinder body 2 in the circumferential direction near one side of the upper ring plate 1. The upper ring plate 1 is connected and fastened to the process ring plate of the pressure stabilizer head 6 through the connecting member 5. The upper ring plate 1 and the process ring plate of the pressure stabilizer head 6 have the same size. The diameter of the cylinder body 2 is larger than the diameter of the pressure stabilizer head 6.

[0026] The present utility model designs the lifting device according to the surfacing construction condition on the inner wall of the pressure stabilizer head 6. The inner diameter of the lifting device is determined based on the outer diameter of the pressure stabilizer head 6, plus the thickness of the thermal insulation belt 7 installed on the outer wall of the pressure stabilizer head 6 and the installation space. The height of the lifting device increases the installation space margin on the basis of the overall height dimension of the head, in combination with the size and load-bearing capacity of the turntable and the outer diameter of the large-end process ring of the pressure stabilizer head 6. Ensure that the pressure stabilizer head 6 is concentric with the turntable during rotation. To facilitate centering, the outer circle of the upper ring plate 1 and the process ring of the pressure stabilizer head 6 are machined to be the same.

[0027] Embodiment 2

[0028] Preferably, the upper ring plate 1 is an annular plate. The inner ring of the upper ring plate 1 is welded to the periphery of the top of the cylinder body 2 as a whole. The plane where the upper ring plate 1 is located is perpendicular to the axis of the cylinder body 2. A plurality of connection holes are provided on the upper ring plate 1, and the positions of the plurality of connection holes on the upper ring plate 1 correspond to the positions of the plurality of connection holes on the process ring plate of the pressure stabilizer head 6.

[0029] Preferably, the lower ring plate 3 is an annular plate. The inner ring of the lower ring plate 3 is welded to the periphery of the bottom of the cylinder body 2 as a whole. The plane where the lower ring plate 3 is located is perpendicular to the axis of the cylinder body 2.

[0030] The outer diameter of the upper ring plate 1 and the lower ring plate 3 is φ3120mm, the inner diameter is Φ2720mm, and the thickness is 30mm. The inner diameter of the cylinder 2 is Φ2720, the thickness is 20mm, and the height is 2000mm.

[0031] According to the outer diameter and height dimensions of the pressure stabilizer head 6, determine the inner and outer diameters, height dimensions, and dimensions of each part of the lifting device, and at the same time verify that the dimensions and load-bearing capacity of the positioner for installing the pressure stabilizer head 6 meet the requirements.

[0032] Embodiment 3

[0033] Preferably, a rectangular hole 2-1 is provided on the side wall of the cylinder 2. The rectangular hole 2-1 is used to install and fix the heat preservation belt 7 for the pressure stabilizer head 6. A reinforcing rib plate is also provided on the side wall of the cylinder 2, and the reinforcing rib plate is welded to the side wall of the cylinder 2 as a whole.

[0034] There are 6 reinforcing rib plates, and the 6 reinforcing rib plates are evenly distributed on the side wall of the cylinder 2. The size of the reinforcing rib plate is 1940×200×20mm.

[0035] Embodiment 4

[0036] Preferably, the connecting member 5 includes a bolt 5-1 and a nut 5-2. The bolt 5-1 passes through the connecting holes on the process ring plate of the pressure stabilizer head 6 and the connecting holes of the corresponding upper ring plate 1 and is fastened to the nut 5-2, so that the upper ring plate 1 and the pressure stabilizer head 6 are fixedly connected.

[0037] The connecting member 5 fixedly connects the upper ring plate 1 and the pressure stabilizer head 6, and other connection methods can also be used to fixedly connect the upper ring plate 1 and the pressure stabilizer head 6.

[0038] Embodiment 5

[0039] According to the outer diameter, weight and structure of the pressure stabilizer head 6, combined with the existing positioner disc size and load-bearing capacity, propose the manufacturing materials for the lifting device, draw the structure diagram of the lifting device, process, assemble and weld the lifting device. The pressure stabilizer head 6 is pre-fixed on the lifting device. According to actual needs, open the rectangular hole 2-1, install and fix the heat preservation belt 7, align the center of the lifting device on the positioner and fix it well. After the surfacing welding of the pressure stabilizer head 6 is completed, immediately lift the lifting device together with the pressure stabilizer head 6 off the positioner. For improving the quality of the pressure stabilizer, this lifting device is very important for manufacturing.

[0040] The process ring plate of the upper ring plate 1 of the present utility model is the same size as that of the pressure stabilizer head 6. The height and size of the lifting device ensure sufficient space for the pressure stabilizer head 6 and the heat preservation belt 7, while controlling the total weight, saving the manufacturing space, and ensuring that the pressure stabilizer head 6 can be smoothly rotated on the positioner.

[0041] The principle of the present utility model is as follows:

[0042] In order to meet the preheating, welding, hydrogen elimination, and grinding requirements in the manufacturing process of the voltage regulator, in view of the fact that the existing lifting device cannot meet the production status, a lifting device for manufacturing the voltage regulator head is provided, which includes an upper ring plate 1, a cylinder body 2, a lower ring plate 3, a lifting lug 4, and a connecting member 5. The upper ring plate 1 is welded to the cylinder body 3 as a whole, used to connect the voltage regulator head 6 and support the voltage regulator head 6; the cylinder body 2 is welded to the upper and lower ring plates as a whole, mainly used to support the voltage regulator head 6; the lower ring plate 3 is welded to the cylinder body 2 as a whole, used to connect the ring plate and the positioner; the lifting lug 4 is used for the overall lifting of the lifting device; the bolt and nut of the connecting member 5 connect the upper ring plate 1 and the voltage regulator head 6 as a whole and fasten them. A rectangular hole 2-1 is provided on the side wall of the cylinder body 2 to facilitate the installation and fixation of the heat preservation belt 7. During use, the lifting device is hoisted to the positioner, and the outer circle of the ring plate of the lifting device is used for alignment to make the center of the voltage regulator head 6 coincide with the center of the positioner, ensuring concentric rotation during the welding process and guaranteeing the surfacing quality.

[0043] The implementation steps of the present utility model are as follows:

[0044] 1. Draw a sketch of the lifting device and process each component: According to the outer diameter and height dimensions of the voltage regulator head 6, determine the inner and outer diameters and height dimensions of the lifting device, the dimensions of each part, verify that the dimensions and load-bearing capacity of the positioner for installing this head meet the requirements, and draw a sketch:

[0045] The upper ring plate 1 is welded to the cylinder body 3 as a whole, used to connect the voltage regulator head 6 and support the voltage regulator head 6; the cylinder body 2 is welded to the upper and lower ring plates as a whole, mainly used to support the voltage regulator head 6; the lower ring plate 3 is welded to the cylinder body 2 as a whole, used to connect the ring plate and the positioner; the lifting lug 4 is used for the overall lifting of the lifting device; the bolt and nut of the connecting member 5 connect the upper ring plate 1 and the voltage regulator head 6 as a whole and fasten them.

[0046] 2. Process the following components:

[0047] 1) Cylinder body 2: 1 piece, inner diameter Φ2720×20, height 2000 mm;

[0048] 2) Upper and lower ring plates: 2 pieces, φ3120 / Φ2720, thickness 30 mm;

[0049] 3) Reinforcing rib plates: 1940×200×20 mm, 6 pieces;

[0050] 4) Lifting lugs 2 pieces;

[0051] Assemble and weld each component into a whole.

[0052] 3. Matching and machining the bolt holes on the upper ring plate: The lifting device of the pressurizer is connected to the process ring plate of the pressurizer head 6. With the port of the pressurizer head 6 facing upward, after the process ring plate coincides with the outer circle of the upper ring plate 1, mark the bolt holes on the upper end face of the lifting device according to the bolt holes on the process ring plate, and then machine the bolt holes.

[0053] 4. Drilling holes in the cylinder wall: Pre-drill rectangular holes in the cylinder wall according to the orientations of the various nozzles on the pressurizer head 6. Modify the hole sizes according to the actual construction requirements until the construction requirements are met. Considering the impact of the holes in the cylinder on the overall rigidity, add 6 stiffening rib plates to the cylinder wall and weld them to the cylinder wall.

[0054] 5. Installing the head in the lifting device: Connect the pressurizer head 6 and the upper ring plate 1 of the lifting device with bolts, and fix the heat preservation belt 7 on the outer wall of the pressurizer head 6 inside the lifting device.

[0055] 6. Fixing the lifting device through the head and waiting for surfacing on the positioner: After fixing the pressurizer head 6 and the lifting device, turn over the lifting device with the large port of the head facing upward. Lift the lifting device to the positioner, align it using the outer circle of the ring plate (upper ring plate or lower ring plate) of the lifting device, so that the center of the pressurizer head 6 coincides with the center of the positioner, ensuring concentric rotation during the welding process and guaranteeing the surfacing quality.

[0056] The lifting device of the present utility model has a simple structural design, does not change the structure of the original equipment, is easy to install, has a reasonable and compact structure. Through verification on the first pressurizer product of "Hualong No. 1", the functionality of this pressurizer head lifting device meets the requirements.

[0057] The present utility model discloses a lifting device for the manufacturing process of a pressurizer head. This lifting device ensures there is enough space to install the pressurizer head and the heating belt, while controlling the total weight, saving manufacturing space, and ensuring that the pressurizer head can rotate smoothly when installed on the positioner.

[0058] In order to facilitate centering, the outer circles of the upper ring plate and the process ring plate of the pressurizer head of the lifting device of the present utility model are machined to be the same. After connecting the upper ring plate and the pressurizer head, it can ensure that the lifting device and the pressurizer head are concentric. Then align the lifting device with the positioner to ensure concentric rotation of the pressurizer head and the positioner, improving the quality of the pressurizer.

[0059] The lifting device of the present utility model has a simple structural design, does not change the structure of the original equipment, is easy to install, has a reasonable and compact structure, and the functionality of this lifting device meets the lifting requirements of the pressurizer.

[0060] The above has made a detailed description of the preferred implementation mode of the present utility model. However, the present utility model is not limited to the above implementation mode. Within the scope of knowledge possessed by ordinary technical personnel in the field, various changes can be made without departing from the purpose of the present utility model.

[0061] Many other changes and modifications can be made without departing from the spirit and scope of the present utility model. It should be understood that the present utility model is not limited to the specific embodiments, and the scope of the present utility model is defined by the appended claims.

Claims

1. A lifting device for the pressurizer head manufacturing process, characterized in that: The invention comprises an upper ring plate (1), a cylinder (2), a lower ring plate (3), a lifting lug (4) and a connecting piece (5), wherein the upper ring plate (1) is fixedly connected to the periphery of the top of the cylinder (2), and the lower ring plate (3) is fixedly connected to the periphery of the bottom of the cylinder (2). The planes where the upper ring plate (1) and the lower ring plate (3) are located are parallel. There are a plurality of lifting lugs (4), and the plurality of lifting lugs (4) are evenly arranged on a side of the outer wall of the cylinder (2) close to the upper ring plate (1) in the circumferential direction. The upper ring plate (1) is fastened to the process ring plate of the stabilizer head (6) by the connecting piece (5). The upper ring plate (1) and the process ring plate of the stabilizer head (6) are consistent in size, and the diameter of the cylinder (2) is larger than the diameter of the stabilizer head (6).

2. The lifting device for the pressurizer head manufacturing process according to claim 1 is characterized in that: The upper ring plate (1) is an annular plate, the inner ring of the upper ring plate (1) is welded to the periphery of the top of the cylinder (2) as a whole, the plane where the upper ring plate (1) is located is perpendicular to the axis of the cylinder (2), and a plurality of connection holes are opened on the upper ring plate (1), and the positions of the plurality of connection holes on the upper ring plate (1) correspond to the plurality of connection holes on the process ring plate of the stabilizer head (6).

3. The lifting device for the pressurizer head manufacturing process according to claim 1 is characterized in that: The lower ring plate (3) is an annular plate, the inner ring of the lower ring plate (3) is welded to the periphery of the bottom of the cylinder (2) as a whole, and the plane where the lower ring plate (3) is located is perpendicular to the axis of the cylinder (2).

4. The lifting device for the pressurizer head manufacturing process according to claim 1 is characterized in that: The side wall of the cylinder (2) is provided with a rectangular hole (2-1), and the rectangular hole (2-1) is used to install and fix the heat preservation belt (7) for the stabilizer head (6). The side wall of the cylinder (2) is also provided with a reinforcing rib plate, and the reinforcing rib plate is welded to the side wall of the cylinder (2) as a whole.

5. The lifting device for the pressurizer head manufacturing process according to claim 2 is characterized in that: The connecting member (5) comprises a bolt (5-1) and a nut (5-2); the bolt (5-1) passes through a connecting hole on the process ring plate of the pressure stabilizer head (6) and a connecting hole on the upper ring plate (1) at a corresponding position and is fastened to the nut (5-2), so that the upper ring plate (1) and the pressure stabilizer head (6) are fixedly connected.

6. The lifting device for the pressurizer head manufacturing process according to claim 1 is characterized by: The outer diameter of the upper ring plate (1) and the lower ring plate (3) is φ3120 mm, the inner diameter is Φ2720 mm, and the thickness is 30 mm; the inner diameter of the cylinder (2) is Φ2720, the thickness is 20 mm, and the height is 2000 mm.

7. The lifting device for the pressurizer head manufacturing process according to claim 4 is characterized by: There are six reinforcing rib plates, which are evenly distributed on the side wall of the cylinder (2), and the dimensions of the reinforcing rib plates are 1940×200×20 mm.

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