CN210260839U

CN210260839U - Hoisting device for top cover of nuclear reactor pressure vessel

Info

Publication number: CN210260839U
Application number: CN202020186925.0U
Authority: CN
Inventors: 邹小清; 盛旭婷; 苏明星; 魏明
Original assignee: Shanghai Electric Nuclear Power Group Co Ltd
Current assignee: Shanghai Electric Nuclear Power Group Co Ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2020-04-07
Anticipated expiration: 2030-02-20

Abstract

An object of the utility model is to provide a hoist device of nuclear reactor pressure vessel top cap, it allows the top cap to carry out the hoist and mount of top cap when the transportation uninstallation. The hoisting device of the nuclear reactor pressure vessel top cover is suitable for the nuclear reactor pressure vessel top cover and comprises three lower lifting lugs, wherein the hoisting device comprises a cross beam, the cross beam is provided with a central part and three bifurcate arms respectively extending from the central part in the horizontal direction, and the free ends of the three bifurcate arms are respectively and integrally provided with the upper lifting lugs and respectively correspond to the three lower lifting lugs; the hoisting device also comprises a vertical beam, wherein the vertical beam comprises a vertical rod, and an upper jacket and a lower jacket which are connected by the vertical rod; the upper lifting lugs are connected with the corresponding lower lifting lugs through vertical beams; wherein, the upper lifting lug and the lower lifting lug are respectively inserted into the upper jacket and the lower jacket and are connected and fixed by a fastener; the bifurcated arm of the cross beam comprises an I-shaped steel beam, a plurality of rib plates and a lifting lug integrally arranged.

Description

Hoisting device for top cover of nuclear reactor pressure vessel

Technical Field

The utility model relates to a hoist device of nuclear reactor pressure vessel top cap.

Background

The head is an important component of a reactor pressure vessel for sealing the pressure vessel while providing a mounting interface for the CRDM through CRDM (control rod drive mechanism) tube holders, which weigh about 60 tons and have a diameter of about 4800mm, and which are about 1200mm above the head. Lift by crane through 3 lugs of top cap in the workshop manufacture process, when the top cap is packed, need include the lug to the top cap for the protection top cap, the full surface of CRDM tube socket is protected with the safety cover, the back of packing, 3 lugs are located inconvenient lifts by crane in the safety cover, if set up new lug in the safety cover outside then not satisfy the strength requirement, if stretch into the safety cover in with the lug be connected then the hoist cable can interfere with the safety cover. In addition, after the top cover is shipped, only single-hook hoisting can be adopted due to the fact that no hoisting condition exists in a workshop, and the requirements for protecting the top cover, stably hoisting and the like are met.

The utility model discloses a utility model patent that bulletin number is "CN 201756414U" discloses a hoisting accessory of nuclear reactor pressure vessel top cap, and it includes the frame, the frame top is provided with the couple that is used for the hoist hookup, and the frame sub-unit connection has the barrel, and the barrel lower part articulates there are a plurality of jibs, is provided with the jib thrust unit who adjusts the jib angle on the barrel, the barrel middle part is connected with the girder through the anti-gyro wheel device, and fixed mounting has electronic dolly on the girder, and electronic dolly is connected with frame bottom ring type guide rail, the girder both sides are provided with the electric block that can make the side-to-side motion. The vertical requirement of the lifting device is high, and the transportation of the top cover is not facilitated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hoist device of nuclear reactor pressure vessel top cap, it allows the top cap to carry out the hoist and mount of nuclear reactor pressure vessel top cap when the transportation uninstallation.

A hoisting device of a nuclear reactor pressure vessel top cover is suitable for the nuclear reactor pressure vessel top cover and comprises three (at least three) lower lifting lugs, wherein the hoisting device comprises a cross beam, the cross beam is provided with a central part and three bifurcate arms respectively extending from the central part in the horizontal direction, and the free ends of the three bifurcate arms are respectively and integrally provided with an upper lifting lug and respectively correspond to the three lower lifting lugs; the hoisting device also comprises a vertical beam, wherein the vertical beam comprises a vertical rod, and an upper jacket and a lower jacket which are connected by the vertical rod; the upper lifting lugs are connected with the corresponding lower lifting lugs through the vertical beams; the upper lifting lug and the lower lifting lug are respectively inserted into the upper jacket and the lower jacket and are connected and fixed by a fastener; the bifurcate arm of the cross beam comprises an I-shaped steel beam and a plurality of rib plates, the I-shaped steel beam comprises an upper side plate, a lower side plate and a web plate, the plurality of rib plates are distributed in the length direction of the I-shaped steel beam and on two sides of the web plate, and the rib plates are respectively welded on the upper side plate, the lower side plate and the web plate of the I-shaped steel beam;

the beam further comprises hoisting lugs arranged on the upper sides of the free ends of the branch arms respectively.

In one embodiment, the rib plates are respectively arranged on two sides of the web plate at the same position in the length direction of the i-shaped steel beam.

In one embodiment, the central portion includes an upper cover plate, a lower cover plate, and a cylinder, the upper cover plate and the lower cover plate are welded to the upper and lower ends of the cylinder, respectively, the central portion further includes a central rib plate corresponding to the three bifurcate arms and extending outward from the outer sidewall of the cylinder, and the central rib plate is welded to the cylinder, the upper cover plate, and the lower cover plate, respectively.

In one embodiment, the central rib is aligned with the web of the i-beam in an extension direction of the web toward the cylinder.

In one embodiment, the upper or lower collet has two side walls with coaxial through holes for the fasteners to pass through and a connecting portion connecting the two side walls with a vertical connecting hole for the vertical rod to connect.

In one embodiment, the vertical connecting hole is a threaded hole, and the vertical rod is a double-headed screw rod and is connected with the vertical connecting hole of the upper jacket or the lower jacket respectively.

In one embodiment, the vertical rod is connected with a fastening nut corresponding to the double-headed screw respectively, and the vertical rod is locked by the fastening nut after being connected with the vertical connecting hole.

In one embodiment, the fastening member is a stud bolt, which passes through the through hole of the upper or lower jacket and the lug hole of the upper or lower lug and is fastened by two nuts, respectively. This hoist device adopts the crossbeam of horizontal extension and the perpendicular roof beam of vertical extension to construct, be connected with the top cap lug, but perpendicular roof beam protractile safety cover and external articulate, because perpendicular roof beam be rigid can not interfere with the safety cover, the hoist cable directly links to each other with the crossbeam during lifting, can realize singly colluding whole lifting, and lift by crane the steady atress of transfer process, the top cap receives fine protection, and its whole height basically depends on the length of erecting the roof beam, and the length of erecting the roof beam depends on the height of top cap again, even if consequently this hoist device has been applyed, can not obviously increase the height of whole top cap yet, even if there is not the condition of lifting by crane in the workshop, allow the top cap to carry out the hoist and mount of top cap when the transportation uninstall.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

fig. 1 is a schematic view of a lifting device for a nuclear reactor pressure vessel head attached to the head.

Fig. 2 is a front view of the cross member.

Fig. 3 is a top view of the cross beam.

Fig. 4 is a view from direction F in fig. 2.

Fig. 5 is a sectional view B-B in fig. 2.

Fig. 6 is a cross-sectional view C-C of fig. 3.

Fig. 7 is a schematic view of the upper or lower jacket.

Fig. 8 is a cross-sectional view D-D in fig. 7.

FIG. 9 is a schematic view of a fastener.

Fig. 10 is a schematic view of a vertical post.

Detailed Description

The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and are not intended to limit the scope of the present invention. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

The nuclear reactor pressure vessel head 3 includes a lower lifting lug 31 and a CRDM tube socket 32, and a protective cover 33 covering the lower lifting lug 31 and the CRDM tube socket 32. The lifting device of the nuclear reactor pressure vessel head 3 shown in fig. 1 comprises a cross beam 1 and three vertical beams 2. As shown in fig. 2 and 3, the cross member 1 has a central portion 10 and three bifurcated arms 11 extending from the central portion 10 in the horizontal direction, respectively, and upper lifting lugs 111 are integrally provided at free ends 110 of the three bifurcated arms 11, respectively. As shown in fig. 1, the vertical beam 2 includes a vertical rod 20 and an upper jacket 21 and a lower jacket 22 connected by the vertical rod 20. The nuclear reactor pressure vessel head 3 may be referred to hereinafter simply as head 3.

The roof 3 has three lower lifting eyes 31 corresponding to the three upper lifting eyes 111, and the three lower lifting eyes 31 are not limited to three, but may be more than three, and the three upper lifting eyes 111 selectively correspond to three of the lower lifting eyes 31 of the roof 3. The upper lifting lug 111 and the corresponding lower lifting lug 31 are connected by the vertical beam 2; wherein, the upper lifting lug 111 and the lower lifting lug 31 are respectively inserted into the upper jacket 21 and the lower jacket 22 and are connected and fixed by the fastener 9. The protective cover 33 has a through hole for the vertical beam 2 to pass through.

As shown in figure 1, the hoisting device is connected with the lower lifting lug 31 of the top cover 3 through the vertical beam 2 and the lower jacket 22 to form a hoisting structure which is fastened stably, the whole height of the hoisting device basically depends on the length of the vertical beam 2, and the length of the vertical beam 2 depends on the height of the top cover 3, so that the height of the whole top cover 3 cannot be obviously increased even if the hoisting device is applied, and in addition, the whole hoisting device is connected with an external sling to bear force, so that the lower lifting lug 31 and the CRDM tube seat 32 of the top cover 3 are well protected in the protecting cover 33, the whole top cover 3 and the hoisting device thereof are arranged to be in a rigid structure, when the top cover is hoisted through the sling, the whole top cover 3 is stressed uniformly, the hoisting and the lowering are stable and reliable, and the problem of quick and convenient hoisting. The cross beam 1 is designed into a three-fork arm structure, so that the rigidity is better, the material can be saved, the interference can be reduced, particularly, the cooperation of the three-fork arm structure and the vertical beam 2 can reduce the possible interference at the periphery, and the operation processes of lifting, transportation and the like are facilitated.

Although one embodiment of a lifting device for a nuclear reactor pressure vessel head is described above in connection with fig. 1-3, in other embodiments of the lifting device, many more details are possible and at least some of these details may vary widely from the embodiments described above. At least some of these details and variations are described below in several embodiments.

As shown in fig. 2 to 4, the bifurcation arm 11 of the cross beam 1 includes an i-section beam 13 and a plurality of rib plates 14, the i-section beam 13 includes an upper side plate 131, a lower side plate 132 and a web 130, the plurality of rib plates 14 are distributed along the length direction of the i-section beam 13 and on both sides of the web 130, and the upper side plate 131, the lower side plate 132 and the web 130 of the i-section beam 13 are respectively welded to each rib plate 14. Through reforming transform to I-steel roof beam 13, the bearing strength who obtains is enough to support the top cap 3 of weighing about 60 tons, simple structure and practicality.

As shown in fig. 3, rib plates 14 are provided on both sides of the web 130 at the same positions in the longitudinal direction of the i-steel beam 13. This is advantageous for optimizing the stress on the i-section beam 13.

As shown in fig. 2 and 3, the cross beam 1 further includes lifting lugs 5 integrally provided on the upper sides of the free ends of the diverging arms 11, respectively, and the lifting lugs 5 are provided to facilitate the connection of a lifting rope with the cross beam 1 and facilitate the uniform stress of the cross beam 1.

The bifurcated arm 11, the upper lifting lug 111 and the lifting lug 5 are designed into an integral structure, so that the mounting and dismounting processes are simplified, the assembly interfaces can be reduced, the reliability is better, and materials can be saved.

As shown in fig. 2 to 6, the central portion 10 includes an upper cover plate 101, a lower cover plate 102, and a cylinder body 100, the upper cover plate 101 and the lower cover plate 102 are welded to upper and lower ends of the cylinder body 100, respectively, the central portion 10 further includes a central rib 103 extending outward from an outer sidewall of the cylinder body 100 corresponding to the three diverging arms 11, and the central rib 103 is welded to the cylinder body 100, the upper cover plate 101, and the lower cover plate 102, respectively. The vertical load-bearing structure using the cylinder 100 as the central portion 10 can provide a large load-bearing capacity using less material, and in addition, the combined structure using the upper and lower cover plates and the central rib plate facilitates the butt joint with the bifurcated arm formed by the i-shaped steel beam.

As shown in fig. 3, the central rib 103 is aligned with the web 130 of the i-section steel beam 13, and is located in the extending direction of the web 130 toward the cylinder 100. By the design, the bearing capacity of the beam 1 is further improved, and the stress condition of the beam is optimized.

Fig. 7 and 8 show the structure of the upper or

lower jacket

21 or 22, the upper or

lower jacket

21 or 22 having two side walls (in fig. 8, left and right side walls 41 and 42) having coaxial through holes (in fig. 8, left and right through holes 410 and 420) through which a fastener passes, and a connecting portion 43 connecting the two side walls, the connecting portion 43 having a vertical connecting hole 430 for connecting with the vertical rod 20. By adopting the structure, the upper lifting lug 111 or the lower lifting lug 31 is inserted between two side walls, namely the left side wall 41 and the right side wall 42, and then the fastening piece 9 is used for penetrating through the through holes, namely the left through hole 410 and the right through hole 420, and the holes on the upper lifting lug 111 or the lower lifting lug 31, so that the hoisting device is connected with the top cover 3 in a detachable connection mode, the connection mode is simple, and the detachment mode is also simple.

As shown in fig. 8, the vertical connection hole 430 is a threaded hole, and as shown in fig. 10, the vertical rod 20 is a double-threaded screw rod, and is connected to the vertical connection hole 430 of the upper jacket 21 or the lower jacket 22, respectively. When the length of the vertical beam 2 needs to be adjusted, the vertical beam can be connected with the upper jacket 21 or the lower jacket 22 through adjusting the thread of the vertical rod 20, so that a structure capable of adjusting the length of the vertical beam 2 is provided, the flexibility of the hoisting device is increased, and the vertical beam is suitable for various top cover models and various transportation occasions.

As shown in fig. 1, the vertical rod 20 is screwed to the vertical connecting hole 430 and is fastened by the fastening nut 24, so as to further improve the reliability of the hoisting device.

As shown in fig. 9, the fastening member 9 is a stud bolt for connecting each collet with a corresponding shackle, for example, it passes through the through-holes (the left through-hole 410 and the right through-hole 420 in fig. 8) of the upper collet 21 or the lower collet 22 and the shackle holes of the upper shackle 111 or the lower shackle 31, and is fastened by two nuts 25, respectively. Two nuts 25 are adopted for fastening, so that on one hand, an axial locking effect is achieved, and on the other hand, a fastening effect is achieved.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention, all without departing from the content of the technical solution of the present invention, fall within the scope of protection defined by the claims of the present invention.

Claims

1. A hoisting device of a top cover of a nuclear reactor pressure vessel is provided with three lower lifting lugs and is characterized by comprising a cross beam, wherein the cross beam is provided with a central part and three bifurcate arms extending from the central part in the horizontal direction respectively, and the free ends of the three bifurcate arms are provided with upper lifting lugs integrally respectively and correspond to the three lower lifting lugs respectively; the hoisting device also comprises a vertical beam, wherein the vertical beam comprises a vertical rod, and an upper jacket and a lower jacket which are connected by the vertical rod; the upper lifting lugs are connected with the corresponding lower lifting lugs through the vertical beams; the upper lifting lug and the lower lifting lug are respectively inserted into the upper jacket and the lower jacket and are connected and fixed by a fastener;

the bifurcate arm of the cross beam comprises an I-shaped steel beam and a plurality of rib plates, the I-shaped steel beam comprises an upper side plate, a lower side plate and a web plate, the plurality of rib plates are distributed in the length direction of the I-shaped steel beam and on two sides of the web plate, and the rib plates are respectively welded on the upper side plate, the lower side plate and the web plate of the I-shaped steel beam;

the cross beam further comprises lifting lugs integrally arranged on the upper sides of the free ends of the bifurcating arms respectively.

2. The hoisting device according to claim 1, wherein the rib plates are respectively arranged on two sides of the web plate at the same position in the length direction of the I-shaped steel beam.

3. The hoisting device according to claim 1, wherein the central portion comprises an upper cover plate, a lower cover plate and a cylinder, the upper cover plate and the lower cover plate are respectively welded to the upper end and the lower end of the cylinder, the central portion further comprises a central rib plate corresponding to the three bifurcate arms and respectively extending outwards from the outer side wall of the cylinder, and the central rib plate is respectively welded to the cylinder, the upper cover plate and the lower cover plate.

4. The hoisting device according to claim 3, wherein the central web is aligned with the web of the I-beam in the direction of extension of the web towards the cylinder.

5. The hoisting device as recited in claim 1, wherein said upper jacket or said lower jacket has two side walls and a connecting portion connecting said side walls, said side walls having coaxial through holes for said fasteners to pass through, said connecting portion having vertical connecting holes for connecting said vertical rods.

6. The hoisting device as recited in claim 5, wherein the vertical connecting hole is a threaded hole, and the vertical rod is a double-headed screw rod, and is connected with the vertical connecting hole of the upper jacket or the lower jacket respectively.

7. The hoisting device as recited in claim 6, wherein the vertical rods are respectively connected with a fastening nut corresponding to the double-headed screws, and the vertical rods are locked by the fastening nuts after being connected with the vertical connecting holes.

8. The hoisting device as recited in claim 5, wherein the fastening member is a stud bolt which is passed through the through hole of the upper jacket or the lower jacket and the eye hole of the upper eye or the lower eye and fastened by two nuts, respectively.