Nuclear power station main steam system sleeve end socket supporting device and installation equipment

Abstract

The utility model discloses a nuclear power station main steam system sleeve end socket supporting device and installation equipment. The supporting device comprises a base and a limiting assembly. The limiting assembly comprises a first limiting piece and a second limiting piece, the first limiting piece is arranged on the base, and the first limiting piece is used for making contact with and supporting the casing end socket; the first limiting piece is closer to the base than the second limiting piece. The second limiting piece and the first limiting piece are detachably connected together, and when the second limiting piece and the first limiting piece are separated from each other, the casing end socket can be hoisted to the first limiting piece. The second limiting piece and the first limiting piece are connected together, and the sleeve end socket can be limited between the second limiting piece and the first limiting piece, so that the sleeve end socket can be prevented from shaking in the installation process, and the pose stability of the sleeve end socket in the installation process is improved. And in addition, when the sleeve end socket is placed on the first limiting piece, workers can conveniently conduct groove grinding on the sleeve end socket.

Description

Technical Field

[0001] The utility model relates to the technical field of the installation of the casing head of the main steam system of a nuclear power plant, in particular to a supporting device and an installation device for the casing head of the main steam system of a nuclear power plant. Background Technique

[0002] The main steam system pipeline of the main steam system of a pressurized water reactor nuclear power plant is responsible for transporting steam from the nuclear island to the conventional island and supplying it to the main steam turbine and other steam-using equipment and systems. A pipeline is led out from the top of each evaporator of the main steam system pipeline, passes through the reactor building through a penetrator, enters the main steam isolation valve room of the safety building, and finally enters the turbine building through a fixed-point casing head (hereinafter referred to as the casing head). That is, in the main steam system of a nuclear power plant, the casing head mainly plays a supporting and isolating role. The left and right ends of the casing head are respectively connected to the steam pipelines on the nuclear island plant side and the conventional island plant side, and the outer peripheral surface of the casing head is welded to the embedded pipe on the wall of the nuclear island plant. Moreover, the casing head is large in volume and heavy in weight, and the assembly between the casing head and the steam pipeline needs to be completed on site. However, the surface of the casing head is smooth without fixed points, and there are great risks during the processes of in-site handling, flipping, and docking with the steam pipeline. At present, the installation method of the casing head on site is to package and bind the outside of the casing head, fasten it with wire ropes, use the on-site lifting tools to lift the casing head above the casing head, and then move the casing head through the lifting tools until it is docked with the steam pipeline. During the hoisting process, personnel cooperate through a temporarily erected scaffold to adjust the position of the casing head so that the casing head and the steam pipeline are on the same axis. The problems existing in the prior art are that since the casing head is always in a suspended state during the docking process with the steam pipeline, the casing head is prone to shaking during the movement, the pose is unstable, and it is easy to collide and rub with the internal facilities of the plant, which is not conducive to the finished product protection of the casing head. Moreover, since personnel need to cooperate through a temporarily erected scaffold to adjust the position of the casing head, it is time-consuming and laborious and the work efficiency is low.

[0003] Before the casing head is docked with the steam pipeline, it is also necessary to grind the bevel of the casing head. In the prior art, the casing head can also only be lifted above the casing head by using the on-site lifting tools, and the bevel of the casing head is ground in a suspended state. Similarly, the casing head is prone to shaking and the pose is unstable in a suspended state, which is not conducive to the smooth progress of the bevel grinding work. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a supporting device and an installation device for the casing head of the main steam system of a nuclear power plant in view of at least one defect proposed in the above background technique.

[0005] The technical solution adopted by the present utility model to solve its technical problems is to provide a support device for the casing head of the main steam system of a nuclear power plant, which includes a base and a limiting component arranged on the base;

[0006] The limiting component includes a first limiting member and a second limiting member. The first limiting member is arranged on the base and is used to contact and support the casing head of the main steam system of the nuclear power plant;

[0007] The second limiting member is detachably connected to the first limiting member, and the first limiting member is closer to the base than the second limiting member; when the second limiting member is connected to the first limiting member, the casing head can be limited between the second limiting member and the first limiting member.

[0008] Preferably, the base includes a support platform and several legs. The legs are connected to the support platform, and the first limiting member is arranged on the support platform.

[0009] Preferably, the support platform includes a first surface and a second surface arranged oppositely. The first limiting member is arranged on the first surface, and the legs are connected to the second surface;

[0010] The support platform is provided with at least one through hole that penetrates the first surface and the second surface.

[0011] Preferably, the support device for the casing head of the main steam system of the nuclear power plant further includes a reinforcement component, and the reinforcement component is connected between the first limiting member and the base.

[0012] Preferably, the reinforcement component includes at least two first reinforcement members connected between the first limiting member and the base, and each first reinforcement member forms an angle of 90° with the base.

[0013] Preferably, the reinforcement component includes at least two second reinforcement members connected between the first limiting member and the base, and each second reinforcement member forms an angle less than 90° with the base.

[0014] Preferably, the support device for the casing head of the main steam system of the nuclear power plant further includes a positioning member. The positioning member is arranged on the base and is located on one side of the limiting component;

[0015] The positioning member includes a base body arranged on one side of the limiting component and a clamping portion connected to the base body;

[0016] The second limiting member is provided with a clamping hole adapted to the clamping portion;

[0017] When the second limiting member is connected to the first limiting member, the clamping portion passes through the clamping hole.

[0018] Preferably, the first limiting member and the second limiting member are respectively arc-shaped.

[0019] Preferably, the sleeve head support device of the nuclear power plant main steam system further includes a locking member, which includes a first connecting plate, a second connecting plate and a locking bolt. The first connecting plate is connected to the first limiting member, the second connecting plate is connected to the second limiting member, and the locking bolt is detachably passed through the first connecting plate and the second connecting plate;

[0020] And / or, rollers are provided on the base.

[0021] The present invention also provides an installation device for the sleeve head of the nuclear power plant main steam system, which includes a forklift and the sleeve head support device of the nuclear power plant main steam system described in any one of the above. The base of the sleeve head support device of the nuclear power plant main steam system can be placed on the forklift forks.

[0022] The present invention has at least the following beneficial effects: Since the second limiting member is detachably connected to the first limiting member, when the second limiting member is separated from the first limiting member, the sleeve head can be hoisted onto the first limiting member. When the second limiting member is connected to the first limiting member, the sleeve head can be limited between the second limiting member and the first limiting member, thereby preventing the sleeve head from shaking during the installation process and improving the pose stability of the sleeve head during the installation process. And when the sleeve head is placed on the first limiting member, it is also convenient for personnel to perform bevel grinding on the sleeve head. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the present invention, the present invention will be further described below in conjunction with the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present invention, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings. In the drawings:

[0024] Figure 1 is a three-dimensional structural schematic diagram of the sleeve head support device of the nuclear power plant main steam system in some embodiments of the present invention;

[0025] Figure 2 is Figure 1 the front view structural schematic diagram of the shown sleeve head support device of the nuclear power plant main steam system;

[0026] Figure 3 is Figure 1Schematic side view structure diagram of the sleeve head support device of the main steam system of the nuclear power plant shown;

[0027] Figure 4 Schematic side view structure diagram of the sleeve head installation equipment of the main steam system of the nuclear power plant in some embodiments of the present invention;

[0028] Figure 5 Schematic structure diagram of the sleeve head of the existing main steam system of the nuclear power plant. Specific embodiments

[0029] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0030] As described in the background art, during the docking process of the sleeve head (abbreviated as sleeve head 3) of the existing main steam system of the nuclear power plant and the steam pipeline, the position of the steam pipeline remains unchanged, and it is necessary to move the sleeve head 3 to a suitable position for coaxial docking with the steam pipeline. In the existing docking methods, it mainly relies on the cooperation of existing lifting tools and temporarily erected scaffolding. The existing problems mainly include the unstable pose of the sleeve head 3 and low work efficiency. To solve this problem, as Figures 1 to 3 shown, the present invention proposes a sleeve head support device for the main steam system of the nuclear power plant (hereinafter referred to as the support device) to stably support the sleeve head 3 and position the sleeve head 3. Further, as Figure 4 shown, a sleeve head installation equipment for the main steam system of the nuclear power plant (hereinafter referred to as the installation equipment) is also provided, which can use a forklift 4 in cooperation with the support device to move the sleeve head 3, so that the sleeve head 3 is always supported and positioned on the support device during the movement process and does not shake. Thus, the work of erecting the scaffolding can be eliminated, and the work efficiency is improved. Moreover, after the pose of the sleeve head 3 is stabilized, it is beneficial to the smooth progress of the groove grinding work.

[0031] As Figures 1 to 3 shown, in some embodiments, the support device includes a base and a limiting component provided on the base. The base can be arranged on the ground 5 of the main steam isolation valve room in the safety building. The base is substantially parallel to the ground 5.

[0032] The limiting component includes a first limiting member 21 and a second limiting member 22. The first limiting member 21 is arranged on the base. The first limiting member 21 can be directly connected to the base or indirectly connected through other intermediate elements, so that the relative position between the first limiting member 21 and the base is fixed. The first limiting member 21 is used to contact and support the sleeve head 3 of the main steam system of the nuclear power plant. Please refer to Figure 5 , Figure 5Fig. 0 shows a sectional view of the existing casing head 3 in an upright state. The casing head 3 is generally annular, and its outer peripheral surface can contact the first limiting member 21.

[0033] The second limiting member 22 is detachably connected to the first limiting member 21, and the first limiting member 21 is closer to the base relative to the second limiting member 22. When the second limiting member 22 is separated from the first limiting member 21, the casing head 3 can be lifted and installed onto the first limiting member 21. By connecting the second limiting member 22 to the first limiting member 21, the casing head 3 can be limited between the second limiting member 22 and the first limiting member 21, thereby preventing the casing head 3 from shaking during the installation process and improving the pose stability of the casing head 3 during the installation process.

[0034] As Figure 5 shown, the casing head 3 includes a first end face 33, a second end face 34, and an outer peripheral surface. The first end face 33 can refer to Figure 5 the right end face of the casing head 3 in Figure 5 , and the second end face 34 can refer to

[0035] the left end face of the casing head 3 in Figure 4 . The outer peripheral surface of the casing head 3 includes an upper half 31 and a lower half 32. The lower half 32 can be supported on the first limiting member 21. Since the first end face 33 of the casing head 3 usually needs to be welded to the steam pipe on the side of the conventional island plant, the second end face 34 usually needs to be welded to the steam pipe on the side of the nuclear island plant, and the outer peripheral surface usually needs to be welded to the embedded pipe on the wall of the nuclear island plant, there are many positions to be welded on the casing head 3, and these positions to be welded need to be grooved and polished before welding. Therefore, when the casing head 3 is placed on the first limiting member 21, it is also convenient for personnel to groove and polish the casing head 3.

[0036] Alternatively, in some other embodiments, rollers (not shown) can also be provided on the base, and the base itself can move horizontally along the ground 5 by relying on the rollers. A lifting mechanism such as a jack is used as the power source for the lifting and moving of the base.

[0037] Specifically, the following details the usage process of a support device and an installation device in an embodiment for the butt joint installation of the casing head 3:

[0038] 1. First, when not installed, the casing head 3 is in a horizontal state. During on-site installation, first separate the second limiting member 22 from the first limiting member 21.

[0039] 2. Use an existing hoisting tool to gradually lift one end of the casing head 3 off the ground 5, and the casing head 3 is flipped from a horizontal state to a vertical state (as Figure 5 shown).

[0040] 3. Move the base to directly below the casing head 3. The operator manipulates the hoisting tool to gradually lower the height of the casing head 3. After the outer peripheral surface of the casing head 3 contacts the first limiting member 21, remove the hoisting tool.

[0041] 4. Insert the forklift forks 41 of the forklift 4 into the gap between the base and the ground 5 so that the base is placed on the forklift forks 41.

[0042] 5. The forklift 4 moves horizontally to move the casing head 3 to one side of the steam pipeline; adjust the height position of the casing head 3 by controlling the lifting mechanism of the forklift 4. Synchronously and finely adjust the horizontal and height positions of the casing head 3 until the casing head 3 is docked with the steam pipeline.

[0043] As Figures 1 to 3 shown, in some embodiments, the base includes a support platform 10 and a plurality of legs 11. The legs 11 are connected to the support platform 10, and the first limiting member 21 is arranged on the support platform 10. The legs 11 can contact the ground 5. The side of the support platform 10 facing away from the limiting assembly can be placed on the forklift forks 41. The number of legs 11 is not limited. As in the Figure 1 embodiment shown, a total of four legs 11 are provided, and the four legs 11 are respectively arranged at the four corners of the support platform 10. However, in other embodiments, the number of legs 11 can also be adjusted accordingly.

[0044] As Figures 1 to 3 shown, in some embodiments, the support platform 10 includes a first surface 101 (the upper surface in the reference figure) and a second surface (the lower surface in the reference figure) arranged opposite to each other. The first limiting member 21 is arranged on the first surface 101, and the legs 11 are connected to the second surface. The interval formed between the second surface and the ground 5 is available for the forklift forks 41 of the forklift 4 to extend into. The support platform 10 is provided with at least one through hole 12, and the through hole 12 penetrates through the first surface 101 and the second surface. This through hole 12 can allow personnel to stand therein, so as to facilitate the personnel to approach the casing head 3 for bevel grinding. Moreover, the solid part of the support platform 10 except for the through hole 12 can also provide stable support. Or, in other embodiments, the through hole 12 may not be provided, and the personnel can stand on the support platform 10 to approach the casing head 3 for bevel grinding, but this will increase the load of the support platform 10.

[0045] As Figures 1 to 3 shown, in some embodiments, the support device further includes a reinforcement assembly connected between the first limiting member 21 and the base. Specifically, the reinforcement assembly includes at least one of a first reinforcement member 61 and a second reinforcement member 62. That is, the first reinforcement member 61 and the second reinforcement member 62 can be selectively provided or provided simultaneously. The number of both the first reinforcement member 61 and the second reinforcement member 62 is at least two.

[0046] Taking Figure 1 the illustrated embodiment as an example, in this embodiment, the reinforcement assembly includes two first reinforcement members 61 and two second reinforcement members 62. The first reinforcement member 61 and the second reinforcement member 62 are respectively connected between the first limiting member 21 and the base. Specifically, the first reinforcement member 61 and the second reinforcement member 62 are respectively connected between the first limiting member 21 and the support platform 10. The main difference between the first reinforcement member 61 and the second reinforcement member 62 is that each first reinforcement member 61 forms a 90° angle with the base, and each second reinforcement member 62 forms an angle less than 90° with the base. That is, each first reinforcement member 61 is arranged vertically relative to the support platform 10, and each second reinforcement member 62 is arranged obliquely relative to the support platform 10. The first limiting member 21 is connected to the base through at least one of the first reinforcement member 61 and the second reinforcement member 62. Both the first reinforcement member 61 and the second reinforcement member 62 can help the first limiting member 21 and the base to be firmly connected together, making the relative position between the first limiting member 21 and the base constant, thereby ensuring the pose stability of the casing head 3.

[0047] As Figures 1 to 3 shown, in some embodiments, the support device further includes a positioning member provided on the base and located on one side of the limiting assembly. Specifically, the positioning member includes a base body 71 provided on one side of the limiting assembly and a clamping portion 72 connected to the base body 71. The second limiting member 22 is provided with a clamping hole 220 adapted to the clamping portion 72. When the second limiting member 22 is connected to the first limiting member 21, the clamping portion 72 passes through the clamping hole 220. Since the positioning member is located on one side of the limiting assembly, the relative position between the positioning member and the first limiting member 21 is constant. And, after the casing head 3 is placed on the first limiting member 21, the clamping hole 220 on the second limiting member 22 can be clamped and matched with one of the clamping portions 72, thereby fixing the relative position between the second limiting member 22 and the positioning member. Therefore, the relative positions among the second limiting member 22, the positioning member, and the first limiting member 21 are also maintained unchanged. Thus, the positioning member can facilitate the quick positioning between the second limiting member 22 and the first limiting member 21, ensuring that the casing head 3 can be firmly limited between the second limiting member 22 and the first limiting member 21.

[0048] As Figures 1 to 3 shown, in some embodiments, in order to enable the first limiting member 21 and the second limiting member 22 to best fit the shape of the casing head 3, the first limiting member 21 and the second limiting member 22 are respectively arc-shaped. Specifically, the first limiting member 21 and the second limiting member 22 may be arc-shaped plates. Please refer to Figure 5 together. Since the first limiting member 21 and the second limiting member 22 are respectively arc-shaped, when the casing head 3 is limited between the second limiting member 22 and the first limiting member 21, the upper half 31 of the outer peripheral surface of the casing head 3 fits the shape of the second limiting member 22. In some embodiments, the upper half 31 of the outer peripheral surface of the casing head 3 can also be in contact with the second limiting member 22; the lower half 32 of the outer peripheral surface of the casing head 3 fits the shape of the first limiting member 21, and the lower half 32 of the outer peripheral surface of the casing head 3 is in contact with the second limiting member 22. That is to say, by pre-designing the sizes of the first limiting member 21 and the second limiting member 22, the first limiting member 21 and the second limiting member 22 can be respectively in contact with the lower half 32 and the upper half 31 of the outer peripheral surface of the casing head 3, so as to clamp the casing head 3 between the first limiting member 21 and the second limiting member 22, effectively ensuring the pose stability of the casing head 3 during movement. Moreover, the risk of damage to the casing head 3 after bumping and friction with the limiting assembly can be reduced.

[0049] As Figures 1 to 3 shown, in some embodiments, the supporting device further includes a locking member. The locking member includes a first connecting plate 81, a second connecting plate 82 and a locking bolt 83. The first connecting plate 81 is connected to the first limiting member 21, the second connecting plate 82 is connected to the second limiting member 22, and the locking bolt 83 is detachably passed through the first connecting plate 81 and the second connecting plate 82. Thus, after removing the locking bolt 83, the first limiting member 21 and the second limiting member 22 can be separated; by passing the locking bolt 83 through the first limiting member 21 and the second limiting member 22, the first limiting member 21 and the second limiting member 22 can be locked together. Of course, in other embodiments, other ways can also be set to achieve the detachable connection between the first limiting member 21 and the second limiting member 22, such as snap connection, threaded connection, etc.

[0050] Understandably, the above embodiments only represent the preferred embodiments of the present utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, the above technical features can be freely combined, and several deformations and improvements can also be made, which all fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present utility model shall fall within the scope covered by the claims of the present utility model.

Claims

1. A casing head support device for a main steam system of a nuclear power plant, characterized in that: It comprises a base and a limiting component arranged on the base; The limiting assembly comprises a first limiting member (21) and a second limiting member (22), wherein the first limiting member (21) is arranged on the base, and the first limiting member (21) is used to contact and support the casing head of the main steam system of the nuclear power plant; The second limiting member (22) is detachably connected to the first limiting member (21), and the first limiting member (21) is closer to the base than the second limiting member (22); when the second limiting member (22) is connected to the first limiting member (21), the casing head can be limited between the second limiting member (22) and the first limiting member (21).

2. The casing head support device for the main steam system of a nuclear power plant according to claim 1, characterized in that: The base comprises a supporting platform (10) and a plurality of supporting legs (11), the supporting legs (11) being connected to the supporting platform (10), and the first limiting member (21) being arranged on the supporting platform (10).

3. The casing head support device for the main steam system of a nuclear power plant according to claim 2, characterized in that: The support platform (10) comprises a first surface (101) and a second surface which are arranged opposite to each other, the first stopper (21) is arranged on the first surface (101), and the support leg (11) is connected to the second surface; The support platform (10) is provided with at least one through hole (12), and the through hole (12) passes through the first surface (101) and the second surface.

4. The casing head support device for the main steam system of a nuclear power plant according to claim 1, characterized in that: The nuclear power plant main steam system casing head support device also includes a reinforcement component, which is connected between the first limit member (21) and the base.

5. The casing head support device for the main steam system of a nuclear power plant according to claim 4, characterized in that: The reinforcement component comprises at least two first reinforcement members (61) connected between the first limiting member (21) and the base, and each of the first reinforcement members (61) forms an angle of 90° with the base.

6. The casing head support device for the main steam system of a nuclear power plant according to claim 4, characterized in that: The reinforcement assembly comprises at least two second reinforcement members (62) connected between the first limiting member (21) and the base, and each of the second reinforcement members (62) forms an angle less than 90° with the base.

7. The casing head support device for the main steam system of a nuclear power plant according to claim 1, characterized in that: The casing head support device of the main steam system of the nuclear power plant further includes a positioning member, which is arranged on the base and located on one side of the limiting assembly; The positioning member comprises a base (71) arranged on one side of the limiting assembly and a clamping portion (72) connected to the base (71); The second limiting member (22) is provided with a clamping hole (220) adapted to the clamping portion (72); When the second limiting member (22) and the first limiting member (21) are connected together, the clamping portion (72) is inserted into the clamping hole (220).

8. The casing head support device for the main steam system of a nuclear power plant according to claim 1, characterized in that: The first limiting member (21) and the second limiting member (22) are respectively in an arc shape.

9. The casing head support device for the main steam system of a nuclear power plant according to claim 1, characterized in that: The nuclear power plant main steam system casing head support device also includes a locking member, the locking member includes a first connecting plate (81), a second connecting plate (82) and a locking bolt (83), the first connecting plate (81) is connected to the first limiting member (21), the second connecting plate (82) is connected to the second limiting member (22), and the locking bolt (83) is detachably provided through the first connecting plate (81) and the second connecting plate (82); And / or, the base is provided with rollers.

10. A casing head installation device for the main steam system of a nuclear power plant, characterized in that: It comprises a forklift (4) and a casing head support device for a main steam system of a nuclear power plant as claimed in any one of claims 1 to 9, wherein the base of the casing head support device for a main steam system of a nuclear power plant can be placed on the fork (41) of the forklift (4).

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