CN221095788U - Support structure for nuclear island ASP water tank - Google Patents

Abstract

The utility model discloses a supporting structure for an ASP water tank of a nuclear island, which comprises a plurality of trusses, a plurality of main beams and a plurality of groups of secondary beams, wherein the trusses are arranged at intervals along the circumferential direction of the outer side of a containment, and the inner side of each truss is connected with an embedded part embedded in the containment; the truss comprises an upper chord, a lower chord and a plurality of web members, wherein the upper chord and the lower chord are horizontally arranged, and each web member is connected between the upper chord and the lower chord; the tops of the trusses are respectively and correspondingly connected with a girder, and the extending direction of each girder is consistent with the extending direction of the corresponding upper chord; the multiple groups of secondary beams are erected on the tops of any two adjacent main beams, and the top surfaces of the multiple groups of secondary beams jointly form a supporting table for supporting the ASP water tank. The supporting structure provided by the utility model can ensure that the ASP water tank has enough support in the pouring process and ensure that the ASP water tank is molded smoothly. The truss can be prefabricated in advance, and only the truss is required to be connected with the embedded part during installation, so that the overhead operation time of constructors can be reduced, and the potential safety hazard is reduced.

Description

Support structure for nuclear island ASP water tank

Technical Field

The utility model relates to the technical field of nuclear island construction, in particular to a supporting structure for an ASP water tank of a nuclear island.

Background

The nuclear power AS system is a safety system in a nuclear power plant, and is used for cooling a nuclear reactor and preventing the nuclear reactor from overheating. The ASP water tank is a part of AS system, and is mainly used for storing prediction and safety energy. When a safety accident occurs, the ASP water tank releases stored water to generate a large amount of steam so as to absorb heat in the nuclear reactor, and meanwhile, the rise of the temperature of the nuclear reactor is effectively slowed down, and the safety and stability of the nuclear power station are ensured.

In addition to AS systems, containment vessels are also an important safety feature in nuclear power, and are disposed on the outermost layer of a nuclear reactor to control and limit the diffusion of radioactive materials from the nuclear reactor. The containment vessel is cylindrical or hemispherical and the ASP tank is typically surrounded and suspended outside the containment vessel. The ASP water tank is of a reinforced concrete structure, so that when concrete pouring forming is carried out, the ASP water tank is high in hanging height and special in shape of the safety shell, a conventional supporting structure is difficult to build, the ASP water tank is easy to lack of support to collapse, the conventional supporting structure needs to be built at high altitude, and potential safety hazards exist when constructors work at high altitude.

Disclosure of utility model

The utility model mainly aims to provide a supporting structure for an ASP water tank of a nuclear island, and aims to solve the technical problems that a conventional supporting structure is difficult to build in the prior art, and potential safety hazards exist for constructors when the conventional supporting structure is built at high altitude.

In order to achieve the above object, the support structure for an ASP water tank of a nuclear island according to the present utility model is located at the bottom of the ASP water tank and is used for supporting the ASP water tank, the nuclear island includes a containment vessel, the ASP water tank is circumferentially disposed along the outside of the containment vessel, the support structure includes a plurality of trusses, a plurality of main beams and a plurality of sub beams, the trusses are circumferentially disposed at intervals along the outside of the containment vessel, the inside of each truss is connected with an embedded part embedded in the containment vessel, and the outside of each truss extends outwards to form an overhanging structure; the truss comprises an upper chord, a lower chord and a plurality of web members, wherein the upper chord and the lower chord are horizontally arranged, and each web member is connected between the upper chord and the lower chord; the tops of the trusses are respectively and correspondingly connected with one main beam, and the extending direction of each main beam is consistent with the extending direction of the corresponding upper chord; the multiple groups of the secondary beams are arranged at the tops of any two adjacent main beams, the top surfaces of the multiple groups of the secondary beams jointly form a supporting table for supporting the ASP water tank, one group of the secondary beams comprises a plurality of secondary beams, and the multiple secondary beams in one group are arranged at intervals along the direction away from the containment vessel.

Optionally, a diagonal brace is arranged at the bottom of the truss, the lower end of the diagonal brace is connected with the containment vessel, and the upper end of the diagonal brace is connected with the lower chord member.

Optionally, the upper chord, the lower chord and the diagonal brace are all connected to one of the embedded parts.

Optionally, an end of each truss remote from the containment vessel extends outwardly to form an extension shelf.

Optionally, on the extension frame, the outermost end of the upper chord member is connected with the outermost end of the lower chord member through one web member.

Optionally, the top of extension frame is provided with platform roof beam and guardrail, the platform roof beam connect in the upper chord member, just the extending direction of platform roof beam with the extending direction of upper chord member is unanimous, the guardrail vertically sets up just the bottom of guardrail connect in the outermost end of upper chord member.

Optionally, in each truss, an extension length of the upper chord is greater than an extension length of the lower chord.

Optionally, a side beam is arranged between any two adjacent trusses, the side beam comprises a plurality of upper chord side beams and a plurality of lower chord side beams, a plurality of upper chord side beams are connected between any two adjacent upper chord side beams, the upper chord side beams are arranged at intervals along the extending direction of the upper chord, a plurality of lower chord side beams are connected between any two adjacent lower chord side beams, and the lower chord side beams are arranged at intervals along the extending direction of the lower chord.

Optionally, the upper chord, the lower chord and the web member are all made of H-section steel.

Optionally, in each truss, the cross-sectional area of the web located at the innermost side is larger than the cross-sectional area of the other webs.

According to the supporting structure for the nuclear island ASP water tank, the upper chord member and the lower chord member are firmly connected to the containment vessel through the embedded parts, the plurality of web members are connected between the upper chord member and the lower chord member and form a lattice structure together with the upper chord member and the lower chord member, the structure is stable and light in dead weight, the supporting structure is guaranteed to have enough supporting bearing capacity for the ASP water tank, the ASP water tank is effectively prevented from collapsing, the ASP water tank is sufficiently supported in the pouring process, and smooth molding of the ASP water tank is guaranteed. The truss provided by the utility model can be prefabricated in advance, and only the truss is required to be connected with the embedded part on the containment vessel during installation, so that the operation process is simple, the time consumption is short, the high-altitude operation time of constructors can be reduced, and the potential safety hazard is effectively reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic side view of a support structure according to an embodiment of the present utility model;

Fig. 2 is a schematic top view of a support structure according to an embodiment of the utility model.

Reference numerals illustrate:

Reference numerals	Name of the name	Reference numerals	Name of the name
				10	Truss frame	30	Secondary beam
11	Upper chord	40	Diagonal bracing
				12	Lower chord	50	Built-in fitting
13	Abdominal member	60	Side beam
				14	Extension rack	61	Upper chord side beam
141	Platform beam	62	Lower chord side beam
				142	Guard bar	70	Safety shell
20	Main girder	80	ASP water tank

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The description of the orientations such as "up", "down", etc. in the present utility model is based on the orientation shown in fig. 1, and is merely for explaining the relative positional relationship between the components in the posture shown in fig. 1, and if the specific posture is changed, the directional indication is changed accordingly.

The utility model provides a supporting structure for an ASP water tank of a nuclear island, which is positioned at the bottom of the ASP water tank and is used for supporting the ASP water tank, wherein the ASP water tank comprises a containment vessel 70, the ASP water tank is arranged along the circumferential direction of the outer side of the containment vessel 70, the supporting structure comprises a plurality of trusses 10, a plurality of main beams 20 and a plurality of groups of secondary beams 30, the trusses 10 are arranged along the circumferential direction of the outer side of the containment vessel 70 at intervals, the inner side of each truss 10 is connected with an embedded part 50 embedded in the containment vessel 70, and the outer side of each truss 10 extends outwards to enable the trusses 10 to form an overhanging structure; the truss 10 comprises an upper chord 11, a lower chord 12 and a plurality of web members 13, wherein the upper chord 11 and the lower chord 12 are horizontally arranged, and each web member 13 is connected between the upper chord 11 and the lower chord 12; the tops of the trusses 10 are respectively and correspondingly connected with a girder 20, and the extending direction of each girder 20 is consistent with the extending direction of the corresponding upper chord 11; the plurality of sets of secondary beams 30 are erected on top of any adjacent two main beams 20, the top surfaces of the plurality of sets of secondary beams 30 together form a supporting table for supporting the ASP water tank, one set of secondary beams 30 includes a plurality of secondary beams 30, and the plurality of secondary beams 30 in one set are arranged at intervals along a direction away from the containment vessel 70.

As shown in fig. 1 and 2, the containment vessel 70 is of a reinforced concrete structure, the embedded parts 50 are embedded in the shell of the containment vessel 70 in advance in the pouring stage of the containment vessel 70, the truss 10 is connected to the containment vessel 70 through a plurality of embedded parts 50, the inner side of the truss 10 is the side connected with the containment vessel 70, and the outer side of the truss 10 is the side far away from the containment vessel 70. A group of secondary beams 30 are respectively arranged above every two adjacent trusses 10, and a plurality of trusses 10 are positioned at the same height, so that each secondary beam 30 is kept horizontal to form a horizontal supporting table. The plurality of secondary beams 30 in a group are arranged at intervals along the extending direction of the main beam 20, and the gaps between the adjacent secondary beams 30 are blocked by the templates at the bottom of the ASP water tank.

In the supporting structure provided by the utility model, the upper chord member 11 and the lower chord member 12 are firmly connected to the containment vessel 70 through the embedded part 50, and the plurality of web members 13 are connected between the upper chord member 11 and the lower chord member 12 and form a lattice structure together with the upper chord member 11 and the lower chord member 12, so that the supporting structure is stable in structure and light in dead weight, and ensures that the supporting structure has enough supporting bearing capacity for the ASP water tank, so that the ASP water tank is effectively prevented from collapsing, and is sufficiently supported in the pouring process, and smooth molding of the ASP water tank is ensured. The truss 10 provided by the utility model can be prefabricated in advance, and the truss 10 is only required to be connected with the embedded part 50 on the safety shell 70 during installation, so that the operation process is simple, the time consumption is short, the high-altitude operation time of constructors can be reduced, and the potential safety hazard is effectively reduced.

In one embodiment, the bottom of truss 10 is provided with braces 40, the lower ends of braces 40 are connected to containment vessel 70, and the upper ends of braces 40 are connected to lower chord 12.

As shown in fig. 1, the diagonal braces 40 are obliquely arranged, the upper ends of the diagonal braces 40 are connected to the middle of the lower chords 12, the diagonal braces 40 and the lower chords 12 form a space stress structure to support the bottom of the truss 10, the lower chords 12 are assisted to transfer the gravity of the ASP water tank to the containment vessel 70, the bearing capacity of the supporting structure is effectively increased, and the supporting structure is prevented from overturning.

In one embodiment, the upper chord 11, the lower chord 12, and the diagonal braces 40 are all connected to an embedment 50.

It will be appreciated that each truss 10 is connected to containment vessel 70 by three embedments 50 provided separately at the inner ends of upper chords 11, lower chords 12 and lower ends of diagonal braces 40. Because the upper chord 11 is a member directly bearing the dead weight of the ASP water tank, the bending moment borne by the upper chord 11 is the largest, the embedded parts 50 connected with the upper chord 11 are reinforced, the upper chord 11 is connected with the corresponding embedded parts 50 through two node plates, and one of the node plates is welded in advance, so that the truss 10 is convenient to install, position and temporarily fix. Each embedded part 50 can ensure the fastening connection between the supporting structure and the containment vessel 70, so that the supporting structure can smoothly transfer the gravity of the ASP water tank to the containment vessel 70.

In one embodiment, each truss 10 extends outwardly from an end of containment vessel 70 to form extension frame 14.

It may be noted that, the upper chord 11 and the lower chord 12 extend outwards to form an extension frame 14, the extension frame 14 is used for erecting a construction platform, the extension frame 14 does not directly participate in supporting the ASP water tank, the stress on the extension frame 14 is small, and the cross-sectional area of the upper chord 11 at the extension frame 14 can be smaller than that of other parts. Extension frame 14 can be prefabricated and installed together with truss 10, and need not to set up construction operation platform alone, and the structure setting is reasonable, saves material.

In one embodiment, the outermost end of the upper chord 11 is connected to the outermost end of the lower chord 12 by a web member 13 on the extension frame 14.

The outermost end of the upper chord 11 is the end of the upper chord 11 far away from the containment vessel 70, and similarly, the outermost end of the lower chord 12 is the end of the lower chord 12 far away from the containment vessel 70, because the outermost ends of the upper chord 11 and the lower chord 12 are far away from the embedded part 50, the bending moment of the end is the largest, the outermost ends of the upper chord 11 and the outermost ends of the lower chord 12 are required to be connected through a web member 13 to form a space stress structure, the upper chord 11 is assisted to transmit stress to the lower chord 12 and finally to the containment vessel 70, the web member 13 provides support for the outermost ends of the upper chord 11, the outermost ends of the upper chord 11 are prevented from inclining, and the stability of the extension frame 14 is effectively improved.

In an embodiment, the top of the extension frame 14 is provided with a platform beam 141 and a guardrail 142, the platform beam 141 is connected to the upper chord 11, and the extension direction of the platform beam 141 is consistent with the extension direction of the upper chord 11, the guardrail 142 is vertically arranged, and the bottom of the guardrail 142 is connected to the outermost end of the upper chord 11.

It is worth to be noted that, the length of the platform beam 141 is consistent with the length of the extension frame 14, the plurality of platform beams 141 on the plurality of extension frames 14 form a construction operation platform, the guard rail 142 is arranged outside the platform beam 141 and has a certain height, so as to protect constructors on the construction operation platform, prevent constructors and equipment from falling, and is safe and reliable.

In one embodiment, the upper chord 11 extends a greater length than the lower chord 12 within each truss 10.

As shown in fig. 1, the length of the upper chord 11 at the extension frame 14 is greater than the length of the lower chord 12 at the extension frame 14, so that the platform beam 141 has a sufficient length to facilitate the operation and passing of constructors, and the length of the lower chord 12 is reduced to enable the web member 13 between the outermost end of the upper chord 11 and the outermost end of the lower chord 12 to be obliquely arranged, so that the structure is more stable, the stress of the supporting structure is transmitted to the safety shell 70 in a dispersed manner, the structural arrangement is reasonable, and the material is effectively saved.

In an embodiment, the side beams 60 are disposed between any two adjacent trusses 10, the side beams 60 include a plurality of upper chord side beams 61 and a plurality of lower chord side beams 62, the plurality of upper chord side beams 61 are connected between any two adjacent upper chords 11, the plurality of upper chord side beams 61 are disposed at intervals along the extending direction of the upper chords 11, the plurality of lower chord side beams 62 are connected between any two adjacent lower chords 12, and the plurality of lower chord side beams 62 are disposed at intervals along the extending direction of the lower chords 12.

The plurality of trusses 10 are arranged around the outer periphery of the containment vessel 70 at intervals, and two adjacent trusses 10 are connected by a plurality of side members 60, so that the plurality of trusses 10 form an integral support structure. Because the truss 10 is arranged at a higher height, the truss 10 can bear larger lateral wind load, meanwhile, the truss 10 is prevented from being damaged due to the lateral earthquake load, and the side beams 60 are arranged to support the upper chord 11 and the lower chord 12 laterally and resist the lateral stress of the truss 10, so that the wind resistance and the earthquake resistance of the supporting structure are improved.

In one embodiment, the upper chord 11, the lower chord 12 and the web members 13 are each made of H-section steel.

It can be understood that the upper chord member 11, the lower chord member 12 and the web members 13 are all made of H-shaped steel, and the H-shaped steel is welded in advance to form the truss 10 structure, so that the section of the H-shaped steel is economical and reasonable, the mechanical property is good, the truss 10 has good bending resistance in all directions, the truss 10 can bear the stress in all directions, and meanwhile, the construction is simple and the material selection is convenient.

In one embodiment, the cross-sectional area of the innermost web member 13 within each truss 10 is greater than the cross-sectional area of the other web members 13.

Further, because the upper chord 11 directly bears the gravity of the upper ASP water tank, the stress in the upper chord 11 is larger, and the pressure exerted by the upper chord 11 on the web members 13 positioned at the innermost side is the largest, the H-shaped steel with proper size is selected according to the internal stress of each web member 13, so that the material is saved as much as possible while the web members 13 have enough bearing capacity, and the supporting structure provided by the utility model has better economical efficiency.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structural modifications made by the present description and accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims (10)

1. A support structure for an ASP water tank for a nuclear island, the nuclear island including a containment vessel, the ASP water tank being disposed circumferentially outside the containment vessel, the support structure being located at a bottom of the ASP water tank, the support structure comprising:

The trusses are circumferentially arranged at intervals along the outer side of the containment, the inner side of each truss is connected with an embedded part embedded in the containment, and the outer side of each truss extends outwards to enable the trusses to form an overhanging structure; the truss comprises an upper chord, a lower chord and a plurality of web members, wherein the upper chord and the lower chord are horizontally arranged, and each web member is connected between the upper chord and the lower chord;

The top parts of the trusses are respectively and correspondingly connected with one girder, and the extending direction of each girder is consistent with the extending direction of the corresponding upper chord;

The multi-group secondary beams are arranged at the tops of any two adjacent main beams in a lap mode, the top surfaces of the multi-group secondary beams jointly form a supporting table for supporting the ASP water tank, one group of secondary beams comprises a plurality of secondary beams, and a plurality of secondary beams in one group are arranged at intervals along the direction away from the containment vessel.

2. The support structure for a nuclear island ASP water tank according to claim 1, wherein a diagonal brace is provided at a bottom of the truss, a lower end of the diagonal brace is connected to the containment vessel, and an upper end of the diagonal brace is connected to the lower chord.

3. The support structure for a nuclear island ASP water tank according to claim 2, wherein the upper chord, the lower chord and the diagonal brace are all connected to one of the embedments.

4. The support structure for a nuclear island ASP tank according to claim 1, wherein each truss extends outwardly from an end of the containment vessel to form an extension shelf.

5. The support structure for a nuclear island ASP tank according to claim 4, wherein the outermost end of the upper chord is connected to the outermost end of the lower chord by means of a web member on the extension frame.

6. The support structure for a nuclear island ASP water tank according to claim 4, wherein a platform beam and a guardrail are provided at a top of the extension frame, the platform beam is connected to the upper chord, and an extension direction of the platform beam is identical to an extension direction of the upper chord, the guardrail is vertically disposed, and a bottom of the guardrail is connected to an outermost end of the upper chord.

7. The support structure for a nuclear island ASP water tank according to any one of claims 1 to 6, wherein the upper chord has an extension length greater than that of the lower chord within each truss.

8. The support structure for a nuclear island ASP water tank according to any one of claims 1 to 6, wherein a side sill is provided between any adjacent two of the trusses, the side sill includes a plurality of upper chord side sills and a plurality of lower chord side sills, a plurality of upper chord side sills are connected between any adjacent two of the upper chords, the plurality of upper chord side sills are arranged at intervals along an extending direction of the upper chords, a plurality of lower chord side sills are connected between any adjacent two of the lower chords, and the plurality of lower chord side sills are arranged at intervals along an extending direction of the lower chords.

9. The support structure for a nuclear island ASP water tank according to any one of claims 1 to 6, wherein the upper chord, the lower chord and the web member are each made of H-section steel.

10. The support structure for an ASP water tank for a nuclear island according to claim 9, wherein a cross-sectional area of the web located at the innermost side is larger than that of the other webs in each of the trusses.