A support platform for a nuclear power reactor pressure vessel

Abstract

The invention discloses a support platform for a nuclear power reactor pressure vessel, comprising: a plurality of fastening devices, used to be connected with the support boss of the nuclear power reactor pressure vessel, the fastening devices comprising a mounting frame and a clamping assembly, the clamping assembly being arranged on the mounting frame, the clamping assembly comprising a first clamping block, a second clamping block and a clamping mechanism, the clamping assembly being able to be placed in a U-shaped groove of the support boss, the clamping mechanism being used to drive the first clamping block and the second clamping block to open to both sides so as to be closely attached to the inner wall of the U-shaped groove to achieve clamping; an operating platform, connected to the mounting frame through a first connecting component, and supported above the fastening devices. It can be assembled using the existing structure of the pressure vessel, and when the vessel is in a vertical processing state, personnel can complete the observation and inspection process of tool alignment and processing surface during processing on the operating platform in the vessel, and achieve the purpose of not damaging the equipment while ensuring the safety of personnel operation.

Description

Technical Field

[0001] The invention is used in the field of nuclear power equipment, and in particular relates to a supporting platform for a nuclear power reactor pressure vessel. Background Art

[0002] A nuclear power reactor pressure vessel is a semi-closed container; for example, a specific nuclear power reactor pressure vessel, see Figure 1 , with a diameter of about 5000mm, a height of about 11000mm, and a weight of more than 250 tons. According to the process requirements, it is necessary to machine the inner wall and flange sealing surface of the container in a vertical state.

[0003] When the reactor pressure vessel is subjected to the final vertical processing of the inner wall, the operator is required to timely inspect and observe the processing parts. Since the workpiece is in a rotating state (slow speed rotating state during observation), and the inner wall of the workpiece has no support boss (see Figure 2 , there is a U-shaped groove on the supporting boss, there is no supporting position, and it is impossible to enter the container to work. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a support platform for a nuclear power reactor pressure vessel, which can be assembled using the existing structure of the pressure vessel. When the vessel is in a vertical processing state, personnel can complete the tool alignment and processing surface observation and inspection processes during the processing on the operating platform inside the container, and achieve the purpose of not damaging the equipment while ensuring the safety of personnel operation.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A support platform for a nuclear power reactor pressure vessel, comprising:

[0007] A plurality of fastening devices, used to be connected to the supporting boss of the nuclear power reactor pressure vessel, the fastening devices comprising a mounting frame and a clamping assembly, the clamping assembly being arranged on the mounting frame, the clamping assembly comprising a first clamping block, a second clamping block and a clamping mechanism, the clamping assembly being capable of being placed in a U-shaped groove of the supporting boss, the clamping mechanism being used to drive the first clamping block and the second clamping block to open to both sides so as to be in close contact with the inner wall of the U-shaped groove to achieve clamping;

[0008] The operating platform is connected to the installation frame through a first connecting component and is supported above the fastening device.

[0009] In some embodiments, the clamping mechanism includes a cam, the cam is connected to the mounting frame via a camshaft, the camshaft is connected to a handle, and the cam has a first flange for opening the first clamping block and a second flange for opening the second clamping block.

[0010] In some embodiments, the first clamping block is connected to the mounting frame via a first clamping shaft, and the second clamping block is connected to the mounting frame via a second clamping shaft.

[0011] In some embodiments, the first clamping block is provided with a first clamping pad tightly attached to the inner wall of the U-shaped groove, and the first clamping pad is detachably connected to the first clamping block; the second clamping block is provided with a second clamping pad tightly attached to the inner wall of the U-shaped groove, and the second clamping pad is detachably connected to the second clamping block.

[0012] In some embodiments, the mounting frame has an upper wall plate, a rear wall plate, a left wall plate and a right wall plate, and the mounting frame defines a contoured space that cooperates with the supporting boss, and the front and bottom of the contoured space are open.

[0013] In some embodiments, the mounting frame is provided with spacers.

[0014] In some embodiments, the first clamping shaft is installed on the rear wall plate, a first spacer sleeve is provided on the first clamping shaft between the first clamping block and the rear wall plate, the second clamping shaft is installed on the rear wall plate, a second spacer sleeve is provided on the second clamping shaft between the second clamping block and the rear wall plate, a support sleeve is provided on the rear wall plate, the cam shaft passes through the support sleeve to connect the handle, and a bearing sleeve is provided between the support sleeve and the cam shaft.

[0015] In some embodiments, further comprising

[0016] The support frame comprises a plurality of second connection components, wherein the plurality of second connection components sequentially connect the fastening devices along the circumference of the inner wall of the nuclear power reactor pressure vessel to form the support frame.

[0017] In some embodiments, the first connecting component includes a main connecting component and a secondary connecting component, the main connecting component is connected between the operating platform and the mounting frame, and the secondary connecting component is connected between the main connecting component and the second connecting component.

[0018] In some embodiments, further comprising

[0019] A plurality of radial support devices are distributed along the circumference of the operating platform and are used to support the operating platform on the inner wall of the nuclear power reactor pressure vessel.

[0020] One of the above technical solutions has at least one of the following advantages or beneficial effects: in view of the structural characteristics of the nuclear power reactor pressure vessel, that is, its inner wall has no supporting position except the supporting boss, the technical solution of the present invention provides basic support through multiple fastening devices that can be matched and connected with the supporting boss, and further builds an operating platform above it, that is, it can be assembled using the existing structure of the pressure vessel. When the container is in a vertical processing state, personnel can complete the tool alignment and processing surface observation and inspection processes during the processing on the operating platform inside the container, and achieve the purpose of not damaging the equipment while ensuring the safety of personnel operation.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a schematic cross-sectional view of a nuclear power reactor pressure vessel;

[0024] Figure 2 It is a structural schematic diagram of a support boss of a nuclear power reactor pressure vessel;

[0025] Figure 3 It is a cross-sectional schematic diagram of the structure of an embodiment of the present invention in use state;

[0026] Figure 4 yes Figure 3 A top view of the structure of an embodiment shown;

[0027] Figure 5 yes Figure 3 A side view of a fastening device structure of one embodiment is shown;

[0028] Figure 6 yes Figure 3 A schematic cross-sectional view of a fastening device according to an embodiment is shown;

[0029] Figure 7 yes Figure 6 Cross-section at DD;

[0030] Figure 8 yes Figure 3 A partial enlarged view of the middle part;

[0031] Fig. 9 yes Figure 3 A partial enlarged view of point B in the middle;

[0032] Fig.10 yes Figure 3Cross-section view at CC. DETAILED DESCRIPTION

[0033] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0034] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0035] In the present invention, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present invention, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0037] The nuclear power reactor pressure vessel 1 is a semi-closed container; for example, a specific nuclear power reactor pressure vessel 1 is shown in Figure 1 , with a diameter of about 5000mm, a height of about 11000mm, and a weight of more than 250 tons. According to the process requirements, it is necessary to machine the inner wall and flange sealing surface of the container in a vertical state. When the inner wall of the reactor pressure vessel 1 is subjected to the final vertical processing, the operator is required to timely inspect and observe the processing parts. Since the workpiece is in a rotating state (slow speed rotating state during observation), and the inner wall of the workpiece has no support boss 11 (see Figure 2 , except that a U-shaped groove 12 is provided on the supporting boss 11, there is no supporting position.

[0038] See also Figure 3An embodiment of the present invention provides a support platform for a nuclear power reactor pressure vessel 1, including an operating platform 2 and a plurality of fastening devices 3, wherein the plurality of fastening devices 3 are used to connect with the support boss 11 of the nuclear power reactor pressure vessel 1, the fastening device 3 includes a mounting frame 31 and a clamping assembly, the clamping assembly is arranged on the mounting frame 31, the clamping assembly includes a first clamping block 32, a second clamping block 33 and a clamping mechanism, the clamping assembly can be inserted into the U-shaped groove 12 of the support boss 11, the clamping mechanism is used to drive the first clamping block 32 and the second clamping block 33 to open to both sides so as to be tightly attached to the inner wall of the U-shaped groove 12 to achieve clamping, and lock the mounting frame 31 to the support boss 11. The specific structure of the clamping assembly will be described in detail below. The operating platform 2 is connected to the mounting frame 31 through a first connecting component and is supported above the fastening device 3.

[0039] In view of the structural characteristics of the nuclear power reactor pressure vessel 1, that is, its inner wall has no supporting position except the supporting boss 11, the technical solution of the present invention provides basic support through multiple fastening devices 3 that can be matched and connected with the supporting boss 11, and further builds an operating platform 2 thereon, that is, it can be assembled using the existing structure of the pressure vessel 1. When the container is in a vertical processing state, personnel can complete the tool alignment and processing surface observation and inspection processes during the processing on the operating platform 2 in the container, and achieve the purpose of not damaging the equipment while ensuring the safety of personnel operation.

[0040] The clamping mechanism may be a hydraulic cylinder, that is, the hydraulic cylinder is placed between the first clamping block 32 and the second clamping block 33, and the first clamping block 32 and the second clamping block 33 are stretched to both sides by the hydraulic cylinder to be tightly attached to the inner wall of the U-shaped groove 12 to achieve clamping. The clamping mechanism may also be a threaded tube, and the two ends of the threaded tube are connected to studs. When in use, the threaded tube is rotated, and the studs at both ends of the threaded tube are driven by threads to stretch the first clamping block 32 and the second clamping block 33 to both sides to be tightly attached to the inner wall of the U-shaped groove 12 to achieve clamping.

[0041] In some embodiments, see Figure 6 , Figure 7 The clamping mechanism includes a cam 34, which is connected to the mounting frame via a cam shaft 35, and the cam shaft 35 is connected to the handle. The cam 34 has a first flange for opening the first clamping block 32 and a second flange for opening the second clamping block 33, see Figure 8 , Fig. 9When in use, the fastening device 3 is placed on the supporting boss 11, and the handle 36 on the fastening device 3 is rotated. As the cam 34 and the first clamping block 32 and the second clamping block 33 are driven during rotation, the arc radius of the cam 34 is continuously increased until the cam 34 presses the clamping block, so that the entire fastening device 3 is tightly fitted with the inner wall of the U-shaped groove 12 of the supporting boss 11. Due to the action of friction, the entire fastening device 3 is expanded and tightened on the supporting boss 11, achieving the effect of connection. At this time, the cam 34 reaches the dead point position and is in a self-locking state.

[0042] When the workpiece is processed, the handle 36 is operated counterclockwise to make the clamping block in contact with the cam 34 rotate around the clamping axis. As the handle 36 rotates, the arc radius of the cam 34 continues to decrease until the cam 34 releases the clamping block and moves the clamping block to completely loosen the inner wall of the product, and the fastening device 3 is removed from the product.

[0043] The first clamping block 32 and the second clamping block 33 are separately arranged or connected to the mounting frame 31, for example, Figure 6 , Figure 7 In some embodiments shown, one end of the first clamping block 32 is connected to the mounting frame 31 through the first clamping shaft 37, and the other end extends along the rotation direction of the cam 34 during tensioning; one end of the second clamping block 33 is connected to the mounting frame 31 through the second clamping shaft 38, and the other end extends along the rotation direction of the cam 34 during tensioning. When the cam 34 rotates, the first clamping block 32 rotates around the first clamping shaft 37, and the second clamping block 33 rotates around the second clamping shaft 38, and finally tensioning or releasing is achieved. The first clamping block 32 and the second clamping block 33 are connected to the mounting frame 31 to form a whole, which is convenient for assembly connection.

[0044] Further, in some embodiments, see Figure 7 The first clamping block 32 is provided with a first clamping pad 39 which is tightly attached to the inner wall of the U-shaped groove 12, and the first clamping pad 39 is detachably connected to the first clamping block 32; the second clamping block 33 is provided with a second clamping pad 310 which is tightly attached to the inner wall of the U-shaped groove 12, and the second clamping pad 310 is detachably connected to the second clamping block 33. The first clamping pad 39 and the second clamping pad 310 are padded between the clamping block and the supporting boss 11 to avoid damage to the clamping block. The detachable connection structure can also ensure the replaceability of the first clamping pad 39 and the second clamping pad 310.

[0045] The mounting frame 31 serves as a connection carrier of the fastening device 3, combines the various parts of the fastening device 3 into one, and further provides support for the first connecting member. The mounting frame 31 can be a plate structure, a frame structure, a block structure, etc., for example, Figure 6 , Figure 7In some embodiments shown, the mounting frame 31 has an upper wall plate 311, a rear wall plate 312, a left wall plate 313 and a right wall plate 314. The mounting frame 31 defines a contour space that matches the support boss 11. The front and bottom of the contour space are open. The first clamping block 32, the second clamping block 33 and the clamping mechanism are all located inside the contour space. When in use, the mounting frame 31 is buckled onto the support boss 11, and the upper wall plate 311, the left wall plate 313 and the right wall plate 314 are matched with the surface of the support boss 11, respectively, so as to quickly realize the assembly of the clamping assembly in the U-shaped groove 12. At the same time, the upper wall plate 311, the left wall plate 313 and the right wall plate 314 are matched with the surface of the support boss 11 and are fixed together with the clamping assembly.

[0046] In some embodiments, the mounting frame 31 is provided with a spacer, and the spacer is arranged between the mounting frame 31 and the supporting boss 11 to avoid damaging the supporting boss 11.

[0047] Among them, see Figure 6 The first clamping shaft 37 is installed on the rear wall plate 312, and a first spacer sleeve 315 is provided on the first clamping shaft 37 between the first clamping block 32 and the rear wall plate 312. The second clamping shaft 38 is installed on the rear wall plate 312, and a second spacer sleeve is provided on the second clamping shaft 38 between the second clamping block 33 and the rear wall plate 312. A support sleeve 316 is provided on the rear wall plate 312, and the cam shaft 35 passes through the support sleeve 316 to connect the handle 36, and a bearing sleeve is provided between the support sleeve 316 and the cam shaft 35.

[0048] See also Figure 3 , Fig.10 In some embodiments, the support platform also includes a support frame, which includes a plurality of second connecting components 4. The second connecting components 4 can be made of aluminum alloy pipes and other pipe fittings. The plurality of second connecting components 4 connect the fastening devices 3 in sequence along the circumference of the inner wall of the nuclear power reactor pressure vessel 1 to form a support frame. The second connecting components 4 and the support frame are both hinged with pins. The fastening device 3 is connected to the support through the second connecting components 4 to improve the connection stability with the support boss 11.

[0049] See also Figure 3 , Fig.10 The first connecting component includes a main connecting component 51 and a secondary connecting component 52. The main connecting component 51 is connected between the operating platform 2 and the mounting frame 31. The secondary connecting component 52 is connected between the main connecting component 51 and the second connecting component 4. The first connecting component can be a pipe fitting, which is arranged along the depth direction of the nuclear power reactor pressure vessel 1 to provide support for the operating platform 2.

[0050] See also Figure 3 , Figure 4In some embodiments, the support platform also includes a plurality of radial support devices 6. The radial support devices 6 may be structures such as bolts, screws, and tightening cylinders. The plurality of radial support devices 6 are distributed along the circumference of the operating platform 2 and are used to support the operating platform 2 on the inner wall of the nuclear power reactor pressure vessel 1.

[0051] In the description of this specification, the description with reference to the terms "example", "embodiment" or "some embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A support platform for a nuclear power reactor pressure vessel, characterized in that: include: A plurality of fastening devices, used to be connected to the supporting boss of the nuclear power reactor pressure vessel, the fastening devices comprising a mounting frame and a clamping assembly, the clamping assembly being arranged on the mounting frame, the clamping assembly comprising a first clamping block, a second clamping block and a clamping mechanism, the clamping assembly being capable of being placed in a U-shaped groove of the supporting boss, the clamping mechanism being used to drive the first clamping block and the second clamping block to open to both sides so as to be in close contact with the inner wall of the U-shaped groove to achieve clamping; The operating platform is connected to the installation frame through a first connecting component and is supported above the fastening device.

2. The support platform for a nuclear power reactor pressure vessel according to claim 1, characterized in that: The clamping mechanism comprises a cam, the cam is connected to the mounting frame via a camshaft, the camshaft is connected to a handle, and the cam has a first flange for opening the first clamping block and a second flange for opening the second clamping block.

3. The support platform for a nuclear power reactor pressure vessel according to claim 2, characterized in that: The first clamping block is connected to the mounting frame via a first clamping shaft, and the second clamping block is connected to the mounting frame via a second clamping shaft.

4. The support platform for a nuclear power reactor pressure vessel according to claim 3, characterized in that: The first clamping block is provided with a first clamping pad tightly attached to the inner wall of the U-shaped groove, and the first clamping pad is detachably connected to the first clamping block; the second clamping block is provided with a second clamping pad tightly attached to the inner wall of the U-shaped groove, and the second clamping pad is detachably connected to the second clamping block.

5. The support platform for a nuclear power reactor pressure vessel according to claim 3 or 4, characterized in that: The installation frame comprises an upper wall plate, a rear wall plate, a left wall plate and a right wall plate, and the installation frame defines a contoured space matched with the supporting boss, and the front and bottom of the contoured space are open.

6. The support platform for a nuclear power reactor pressure vessel according to claim 5, characterized in that: The mounting frame is provided with spacers.

7. The support platform for a nuclear power reactor pressure vessel according to claim 5, characterized in that: The first clamping shaft is installed on the rear wall plate, and a first spacer sleeve is provided on the first clamping shaft between the first clamping block and the rear wall plate. The second clamping shaft is installed on the rear wall plate, and a second spacer sleeve is provided on the second clamping shaft between the second clamping block and the rear wall plate. A support sleeve is provided on the rear wall plate, and the cam shaft passes through the support sleeve to connect the handle, and a bearing sleeve is provided between the support sleeve and the cam shaft.

8. The support platform for a nuclear power reactor pressure vessel according to claim 1, characterized in that: Also includes The support frame comprises a plurality of second connection components, wherein the plurality of second connection components sequentially connect the fastening devices along the circumference of the inner wall of the nuclear power reactor pressure vessel to form the support frame.

9. The support platform for a nuclear power reactor pressure vessel according to claim 8, characterized in that: The first connecting component includes a main connecting component and a secondary connecting component, the main connecting component is connected between the operating platform and the installation frame, and the secondary connecting component is connected between the main connecting component and the second connecting component.

10. The support platform for a nuclear power reactor pressure vessel according to claim 1, characterized in that: Also includes A plurality of radial support devices are distributed along the circumference of the operating platform and are used to support the operating platform on the inner wall of the nuclear power reactor pressure vessel.

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