CN220889239U

CN220889239U - Assembled steel ladder for corridor of nuclear power plant

Info

Publication number: CN220889239U
Application number: CN202322558614.9U
Authority: CN
Inventors: 徐志军; 刘文元; 高禄平; 张彩良; 谢舒; 浦仕勇; 刘志辉
Original assignee: Fujian Ningde Nuclear Power Co Ltd
Current assignee: Fujian Ningde Nuclear Power Co Ltd
Priority date: 2023-09-20
Filing date: 2023-09-20
Publication date: 2024-05-03
Anticipated expiration: 2033-09-20

Abstract

The utility model discloses an assembled steel ladder for a corridor of a nuclear power plant, which comprises a diagonal beam assembly, wherein one end of the diagonal beam assembly is connected with the wall surface of the corridor through a top connecting assembly, the other end of the diagonal beam assembly is connected with the ground of the corridor through a bottom connecting assembly, the diagonal beam assembly is detachably connected with the top connecting assembly, the diagonal beam assembly is detachably connected with the bottom connecting assembly, a hand guard handrail is further detachably arranged on the upper portion of the diagonal beam assembly, a plurality of pedals are further detachably arranged in the diagonal beam assembly, the pedals are sequentially arranged from low to high, and a supporting assembly for supporting the diagonal beam assembly is further detachably connected with the diagonal beam assembly. The assembled steel ladder for the corridor of the nuclear power plant is spliced in a modularized mode, so that the installation of the stair inside the corridor is realized, the site construction is convenient, the transportation is convenient, the site fire welding and weld seam flaw detection are not needed, the bolts are only needed to be spliced and fastened according to the drawing, and the fire safety hidden danger caused by welding is avoided.

Description

Assembled steel ladder for corridor of nuclear power plant

Technical Field

The utility model relates to the field of steel structure stairs, in particular to an assembled steel ladder for a nuclear power plant corridor.

Background

The conventional manufacturing of the traditional steel structure stairway is to lap-joint all parts on site and weld the parts until an integral body is formed; if the volume of the stair is too large, the stair can be divided into a plurality of integers when inconvenient transportation is carried out, then the stair is welded or assembled on site, steel deformation must be prevented when the steel structure is welded, the welding seam is generally rough, polishing is needed, the whole stair is inconvenient to carry, and a large-scale installation space is needed to be reserved on site. The corridor of the nuclear power plant is limited by the space position, only one person can lean on the narrow place to pass through, the material transportation is greatly hindered, the electricity taking and ventilation in the corridor are inconvenient, and the field welding conditions are limited.

Disclosure of utility model

The utility model aims to solve the technical problem of providing an assembled steel ladder for a nuclear power plant corridor.

The technical scheme adopted for solving the technical problems is as follows: the assembled steel ladder for the corridor of the nuclear power plant comprises an inclined beam assembly, wherein one end of the inclined beam assembly is connected with the wall surface of the corridor through a top connecting assembly, and the other end of the inclined beam assembly is connected with the ground of the corridor through a bottom connecting assembly;

The oblique beam assembly is detachably connected with the top connecting assembly, and the oblique beam assembly is detachably connected with the bottom connecting assembly;

the hand guard handrail is detachably arranged on the upper portion of the diagonal member assembly, a plurality of pedals are detachably arranged in the diagonal member assembly, the pedals are sequentially arranged from low to high, and the diagonal member assembly is detachably connected with a supporting assembly for supporting the diagonal member assembly.

In some embodiments, the oblique beam assembly comprises a pair of oblique beam matrixes, and a plurality of pedal mounting plates which are arranged corresponding to the pedals are connected between the pair of oblique beam matrixes;

each inclined beam base body comprises a plurality of inclined beam unit modules, and the inclined beam unit modules are connected through inclined beam connecting plates.

In some embodiments, the pedal mounting plate and the oblique beam base are connected together by welding, and the pedal mounting plate and the pedal are connected together by a first bolt.

In some embodiments, the top connecting assembly comprises a top connecting plate arranged at the top end of the inclined beam base body and a top substrate fixedly connected with the top connecting plate;

The top connecting plate is connected with the inclined beam base body through a second bolt, the top connecting plate is connected with the top base plate through welding, and the top base plate is installed on the wall surface of the gallery through a first expansion anchor bolt.

In some embodiments, the bottom connecting assembly comprises a bottom connecting plate arranged at the bottom end of the oblique beam base body and a bottom substrate fixedly connected with the bottom connecting plate;

The bottom connecting plate is connected with the inclined beam base body through a third bolt, the bottom connecting plate is connected with the bottom base plate through welding, and the bottom base plate is installed on the ground of the gallery through a second expansion anchor bolt.

In some embodiments, the supporting component comprises a supporting frame connected with the oblique beam base body and a supporting connecting plate arranged at the bottom end of the supporting frame;

The support frame is connected with the inclined beam base body through a fourth bolt or the inclined beam connecting plate, the support frame is connected with the support connecting plate through welding, and the support connecting plate is installed on the ground of the corridor through a third expansion anchor bolt.

In some embodiments, the hand guard railing comprises a handrail connecting plate detachably connected with the inclined beam base body, a plurality of handrail vertical beams connected with the handrail connecting plate through welding, a plurality of handrail cross beams connected with the handrail vertical beams through welding, and a handrail fixing beam connected with the top ends of the handrail vertical beams through welding;

in some embodiments, the angle of inclination of the armrest cross member is consistent with the angle of inclination of the diagonal beam base, and the armrest vertical beams are arranged in sequence from low to high along the direction of inclination of the diagonal beam base.

In some embodiments, the handrail securing beam has a diameter of 45mm to 50mm and a thickness of 3mm to 4mm;

The diameters of the handrail vertical beam and the handrail cross beam are 25mm to 30mm, and the thicknesses of the handrail vertical beam and the handrail cross beam are 2mm to 3mm.

In some embodiments, the tread is an L-shaped plate-like structure formed by bending a patterned steel plate, and the thickness of the tread is 4mm to 5mm.

The implementation of the utility model has the following beneficial effects: the assembled steel ladder for the corridor of the nuclear power plant is spliced in a modularized mode, so that the installation of the stair inside the corridor is realized, the site construction is convenient, the transportation is convenient, the site fire welding and weld seam flaw detection are not needed, the bolts are only needed to be spliced and fastened according to the drawing, and the fire safety hidden danger caused by welding is avoided.

Drawings

In order to more clearly illustrate the technical solution of the present utility model, the following description will be given with reference to the accompanying drawings and examples, it being understood that the following drawings only illustrate some examples of the present utility model and should not be construed as limiting the scope, and that other related drawings can be obtained from these drawings by those skilled in the art without the inventive effort. In the accompanying drawings:

FIG. 1 is a schematic isometric view of an assembled steel ladder for a nuclear power plant corridor in some embodiments of the present utility model;

FIG. 2 is a schematic diagram of a cross-sectional structure of a hand guard rail of the assembled steel ladder for the nuclear power plant corridor shown in FIG. 1;

FIG. 3 is a schematic side view of the assembled oblique beam assembly of the nuclear power plant corridor of FIG. 1;

FIG. 4 is a schematic diagram of a connection structure between the diagonal beam base and the bottom substrate shown in FIG. 3.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present utility model.

It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or one or more intervening elements may also be present. The terms "first," "second," "third," and the like are used merely for convenience in describing the present utility model and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," etc. may explicitly or implicitly include one or more such features. 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.

Referring to fig. 1 to 4, the utility model discloses an assembled steel ladder for a corridor of a nuclear power plant, which comprises a diagonal member assembly 10, wherein one end of the diagonal member assembly 10 is connected with a wall surface of the corridor through a top connecting assembly 20, the other end of the diagonal member assembly 10 is connected with the ground of the corridor through a bottom connecting assembly 30, wherein the diagonal member assembly 10 is detachably connected with the top connecting assembly 20, and the diagonal member assembly 10 is detachably connected with the bottom connecting assembly 30. The upper part of the diagonal beam assembly 10 is also detachably provided with a handguard handrail 40, the diagonal beam assembly 10 is also detachably provided with a plurality of pedals 50, the pedals 50 are sequentially arranged from low to high, and the diagonal beam assembly 10 is also detachably connected with a supporting assembly 60 for supporting the diagonal beam assembly 10.

It can be understood that the assembled steel ladder for the corridor of the nuclear power plant realizes the installation of the inner stairs of the corridor through modular splicing, is convenient for site construction and transportation, does not need site fire welding and weld joint flaw detection, only needs assembling and fastening bolts according to the drawings, and avoids the fire safety hidden trouble caused by welding.

As shown in fig. 1 and 3, the diagonal member assembly 10 includes a pair of diagonal member substrates 101, a plurality of pedal mounting plates 102 corresponding to the pedals 50 are connected between the pair of diagonal member substrates 101, the diagonal member substrates 101 may be channel steel, each diagonal member substrate 101 includes a plurality of diagonal member unit modules, the plurality of diagonal member unit modules are connected by diagonal member connection plates 103, and it is understood that the diagonal member substrates 101 are assembled and spliced, and can be fastened by the diagonal member connection plates 103 by means of bolts.

Meanwhile, the pedal mounting plate 102 may be provided with a threaded hole connected to the pedal 50, the pedal mounting plate 102 and the diagonal beam base 101 are connected together by welding, and the pedal mounting plate 102 and the pedal 50 are connected together by a first bolt, in this embodiment, an M8 stainless steel bolt.

In addition, the pedal 50 is an L-shaped plate-shaped structure formed by bending a patterned steel plate, the patterned steel plate can play a role in skid resistance and decoration, the comprehensive effects of the patterned steel plate in terms of skid resistance, bending resistance, metal quantity saving, appearance and the like are obviously superior to those of a common patterned plate, and the surface of the patterned steel plate is allowed to have thin-layer iron oxide scale, iron rust and other local defects of rough surface and allowable deviation of height or depth due to the falling of the iron oxide scale. The thickness of the pedal 50 is 4mm to 5mm, and the thickness thereof is preferably 4.5mm.

As shown in fig. 3, the top connecting assembly 20 includes a top connecting plate 201 disposed at the top end of the diagonal beam base 101 and a top base plate 202 fixedly connected to the top connecting plate 201, the top connecting plate 201 is connected to the diagonal beam base 101 by a second bolt, the top connecting plate 201 and the top base plate 202 are connected together by welding, and the top base plate 202 is mounted on a wall surface of a corridor by a first expansion anchor 203. It will be appreciated that the top web 201 and top base plate 202 may be pre-welded off site, with the top web 201 being attached to the beam base 101 using a second bolt at the assembly site, while the top base plate 202 is secured to the wall of the gallery using a first expansion anchor 203. The second bolt is in this embodiment embodied as an M12 stainless steel bolt, and the first expansion anchor 203 is embodied as an M12 expansion anchor.

As shown in fig. 3 and 4, the bottom connecting assembly 30 includes a bottom connecting plate 301 disposed at the bottom end of the diagonal beam base 101 and a bottom base plate 302 fixedly connected to the bottom connecting plate 301, the bottom connecting plate 301 is connected to the diagonal beam base 101 by a third bolt, the bottom connecting plate 301 and the bottom base plate 302 are connected together by welding, and the bottom base plate 302 is installed on the floor of the corridor by a second expansion anchor 303. It will be appreciated that the bottom connection plate 301 and the bottom base plate 302 may be pre-welded off-site, the bottom connection plate 301 being connected to the diagonal beam base 101 using a third bolt in the assembly site, while the bottom base plate 302 is fastened to the floor of the corridor using a second expansion anchor 303. The third bolt is in this embodiment embodied as an M12 stainless steel bolt, and the second expansion anchor 303 is embodied as an M12 expansion anchor.

As shown in fig. 1 and 3, the support assembly 60 includes a support frame 601 connected with the diagonal beam base 101 and a support connection plate 602 provided at the bottom end of the support frame 601, the support frame 601 is connected with the diagonal beam base 101 through a fourth bolt or the diagonal beam connection plate 103, the support frame 601 is connected with the support connection plate 602 through welding, and the support connection plate 602 is installed on the floor of the corridor through a third expansion anchor 603. It will be appreciated that the support frame 601 and the support connection plate 602 may be prefabricated and welded outside the assembly site, and the diagonal beam base 101 may be connected to the diagonal beam base 101 by a fourth bolt in the assembly site, or may be fixed by using the inner and outer pairs of clamps of the diagonal beam connection plate 103. While the support web 602 is fastened to the floor of the corridor using a third expansion anchor 603 to support the tilt beam assembly 10, the support frame 601 may be made of channel steel of the same specifications as the tilt beam base 101. The fourth bolt is in this embodiment embodied as an M12 stainless steel bolt, and the third expansion anchor 603 is embodied as an M12 expansion anchor.

As shown in fig. 2, the hand guard rail 40 includes a handrail connecting plate 401 detachably connected to the diagonal beam base 101, a plurality of handrail vertical beams 402 connected to the handrail connecting plate 401 by welding, a plurality of handrail cross beams 403 connected to the handrail vertical beams 402 by welding, and a handrail fixing beam 404 welded to the top ends of the plurality of handrail vertical beams 402. It will be appreciated that the arm rest connection plate 401, the plurality of arm rest vertical beams 402, the plurality of arm rest cross beams 403, and the arm rest fixing beams 404 may be pre-welded off-site and then integrally mounted to the diagonal beam base 101 through the arm rest connection plate 401 in the assembly site. The inclination angle of the armrest cross member 403 matches the inclination angle of the diagonal member base 101, and the plurality of armrest vertical members 402 are arranged in this order from low to high in the direction of inclination of the diagonal member base 101.

In addition, the handrail fixing beam 404 has a diameter of 45mm to 50mm, a thickness of 3mm to 4mm, the handrail vertical beam 402 and the handrail cross beam 403 have diameters of 25mm to 30mm, and the handrail vertical beam 402 and the handrail cross beam 403 have thicknesses of 2mm to 3mm. In this embodiment, the diameter of the armrest fixing beam 404 is preferably 48mm, the thickness thereof is preferably 3.5mm, the diameters of the armrest vertical beam 402 and the armrest cross beam 403 are preferably 28mm, and the thicknesses of the armrest vertical beam 402 and the armrest cross beam 403 are preferably 2.8mm.

Preferably, the assembled steel ladder for the nuclear power plant corridor is sprayed by adopting a yellow warm tone, avoids adopting a black/gray cold tone, reduces the pressing feeling of personnel in an underground corridor space, and has a warning effect due to the fact that the yellow tone is also safe.

It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. The assembled steel ladder for the corridor of the nuclear power plant is characterized by comprising an inclined beam assembly (10), wherein one end of the inclined beam assembly (10) is connected with the wall surface of the corridor through a top connecting assembly (20), and the other end of the inclined beam assembly (10) is connected with the ground of the corridor through a bottom connecting assembly (30);

The oblique beam assembly (10) is detachably connected with the top connecting assembly (20), and the oblique beam assembly (10) is detachably connected with the bottom connecting assembly (30);

The hand guard handrail is still detachably installed on sloping subassembly (10) upper portion (40), still detachably install a plurality of footboard (50) in sloping subassembly (10), footboard (50) are arranged in proper order from low to high, just sloping subassembly (10) still can be dismantled and be connected with support assembly (60) that are used for supporting sloping subassembly (10).

2. The assembled steel ladder for a nuclear power plant corridor according to claim 1, wherein the oblique beam assembly (10) comprises a pair of oblique beam bases (101), and a plurality of pedal mounting plates (102) which are arranged corresponding to the pedals (50) are connected between the pair of oblique beam bases (101);

Each inclined beam base body (101) comprises a plurality of inclined beam unit modules, and the inclined beam unit modules are connected through inclined beam connecting plates (103).

3. The assembled steel ladder for a nuclear power plant corridor according to claim 2, characterized in that the pedal mounting plate (102) and the oblique beam base body (101) are connected together by welding, and the pedal mounting plate (102) and the pedal (50) are connected together by a first bolt.

4. The assembled steel ladder for a nuclear power plant corridor according to claim 2, wherein the top connection assembly (20) comprises a top connection plate (201) provided at the top end of the diagonal beam base body (101) and a top base plate (202) fixedly connected with the top connection plate (201);

the top connecting plate (201) is connected with the inclined beam base body (101) through a second bolt, the top connecting plate (201) and the top base plate (202) are connected together through welding, and the top base plate (202) is installed on the wall surface of the gallery through a first expansion anchor bolt (203).

5. The assembled steel ladder for a nuclear power plant corridor according to claim 2, wherein the bottom connecting assembly (30) comprises a bottom connecting plate (301) arranged at the bottom end of the oblique beam base body (101) and a bottom base plate (302) fixedly connected with the bottom connecting plate (301);

The bottom connecting plate (301) is connected with the inclined beam base body (101) through a third bolt, the bottom connecting plate (301) and the bottom base plate (302) are connected together through welding, and the bottom base plate (302) is installed on the ground of the gallery through a second expansion anchor bolt (303).

6. The assembled steel ladder for a nuclear power plant corridor according to claim 2, wherein the supporting component (60) comprises a supporting frame (601) connected with the oblique beam base body (101) and a supporting connecting plate (602) arranged at the bottom end of the supporting frame (601);

The support frame (601) is connected with the inclined beam base body (101) through a fourth bolt or the inclined beam connecting plate (103), the support frame (601) is connected with the support connecting plate (602) through welding, and the support connecting plate (602) is installed on the ground of the gallery through a third expansion anchor bolt (603).

7. The assembled steel ladder for a nuclear power plant corridor according to claim 2, wherein the hand guard railing (40) includes a handrail connection plate (401) detachably connected to the diagonal beam base body (101), a plurality of handrail vertical beams (402) connected to the handrail connection plate (401) by welding, a plurality of handrail cross beams (403) connected to the handrail vertical beams (402) by welding, and a handrail fixing beam (404) connected to the top ends of the plurality of handrail vertical beams (402) by welding.

8. The assembled steel ladder for a nuclear power plant corridor according to claim 7, wherein the inclination angle of the handrail cross beam (403) is identical to the inclination angle of the diagonal beam base body (101), and the handrail vertical beams (402) are arranged in order from low to high along the inclination direction of the diagonal beam base body (101).

9. The assembled steel ladder for nuclear power plant corridor according to claim 7, characterized in that the handrail fixing beam (404) has a diameter of 45mm to 50mm and a thickness of 3mm to 4mm;

The diameters of the handrail vertical beam (402) and the handrail cross beam (403) are 25mm to 30mm, and the thicknesses of the handrail vertical beam (402) and the handrail cross beam (403) are 2mm to 3mm.

10. The assembled steel ladder for a nuclear power plant corridor according to claim 1, wherein the step (50) is an L-shaped plate-shaped structure formed by bending a patterned steel plate, and the thickness of the step (50) is 4mm to 5mm.