Steel crane beam

Abstract

The utility model discloses a steel crane beam which comprises a beam body and a reinforcing structure arranged on the beam body, the beam body comprises a web, an upper flange and a lower flange, and the upper flange and the lower flange are arranged on the web. The reinforcing structure comprises a plurality of transverse stiffening ribs distributed on the two transverse sides of the web and arranged in the length direction of the web and reinforcing assemblies arranged between every two adjacent transverse stiffening ribs, relatively closed reinforcing cavities are formed among the reinforcing assemblies, the web and the upper flange, and observation openings are formed in the reinforcing cavities. According to the steel crane beam provided by the invention, the service life of the steel crane beam can be effectively guaranteed, and meanwhile, the long-term use safety of the steel crane beam can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to structural engineering technical field, concretely relates to a steel crane beam. BACKGROUND

[0002] In structural engineering, the steel crane beam is a load-bearing structure directly bearing crane load and is one of the important structures of the upper part of the plant. It bears the vertical and horizontal loads generated when the crane is hoisted and transported. The vertical load generates bending moment and shear force in the vertical direction of the steel crane beam, and the horizontal load generates bending moment and shear force in the horizontal direction of the upper flange plane of the steel crane beam.

[0003] Domestic and foreign experience shows that the steel crane beam often starts to have different degrees of fatigue damage in a short service period, especially near the upper flange of the beam. Such cracks can develop rapidly and seriously affect the safe use of the beam. The causes of such cracks include frequent cyclic wheel pressure dynamic load, excessive rail clamping force, track eccentricity, stress concentration, and welding and structural defects of the beam. Among them, the additional torsion caused by the track eccentricity in the neck part of the beam weld area is the most serious. Therefore, during the use of the steel crane beam, certain reinforcement measures are usually taken to ensure the service life and safety of the steel crane beam. However, in the past steel crane beam structure, the reinforcement of the steel crane beam is usually completed by setting a number of transverse stiffening ribs on the web of the beam at intervals and attaching a number of L-shaped angle steels at the neck part where the upper flange of the beam meets the web. This traditional steel crane beam reinforcement structure can reduce the risk of upper beam cracking to a certain extent and improve the safety and service life of the beam. However, since the attached L-shaped angle steels block the neck part where the upper flange of the beam meets the web, it is not conducive to observing and monitoring the use of the neck part, which still poses a certain safety risk in the long-term use.

[0004] Therefore, it is necessary to provide a new steel crane beam structure to effectively ensure the service life of the steel crane beam, and to improve the safety of the long-term use of the steel crane beam. SUMMARY

[0005] Therefore, the purpose of the utility model is to provide a steel crane beam structure that can effectively ensure the service life of the steel crane beam and improve the safety of the long-term use of the steel crane beam.

[0006] To achieve the above object, the utility model provides the following technical scheme: a steel crane beam, including beam body and set up in the reinforcing structure of beam body, the beam body includes the web and sets up in the upper flange and lower flane of web, the reinforcing structure includes: the multiple cross stiffening ribs of distribution in the lateral two sides of web and along the length direction of web arrangement and the reinforcing assembly of setting up between the lateral two cross stiffening ribs of adjacent, the reinforcing assembly is formed with the relatively closed reinforcing cavity between web and upper flange, be equipped with the observation port on the reinforcing cavity.

[0007] Further, the reinforcing assembly includes the first longitudinal stiffening plate of being fixed on web and the second longitudinal stiffening plate of being fixed on the lower surface of upper flange, the longitudinal both ends of first longitudinal stiffening plate are fixedly connected with the lateral two cross stiffening ribs of adjacent respectively, the lower part of second longitudinal stiffening plate is fixedly connected with first longitudinal stiffening plate, and the reinforcing cavity is formed between web, first longitudinal stiffening plate, second longitudinal stiffening plate, upper flange and the lateral two cross stiffening ribs of adjacent.

[0008] Further, the observation port is a through hole set up on second longitudinal stiffening plate.

[0009] Further, the through hole is fixed with reinforcing pipe.

[0010] Further, the first longitudinal stiffening plate is located in the upper position of web.

[0011] Further, the reinforcing structure further includes several oblique stiffening plates set up in web and distribution in the lateral two sides of web.

[0012] Further, the oblique stiffening plate is arranged in pairs on the lateral two sides of web.

[0013] Further, the oblique stiffening plate is distributed in the position of the length direction both ends of web.

[0014] Further, the cross stiffening rib is arranged in pairs on the lateral two sides of web, and the cross stiffening rib divides the corresponding side of web into odd number of sections respectively.

[0015] Further, the both ends of cross stiffening rib located in the length direction both ends of web are fixedly connected with upper flange and lower flane respectively, and the bottom of remaining cross stiffening rib is provided with gap between lower flane.

[0016] Compared with the prior art, the utility model has the beneficial effects as follows:

[0017] The steel crane beam provided by this utility model can effectively guarantee the service life of the steel crane beam and improve its long-term safety. Specifically, the steel crane beam has transverse stiffening ribs and a reinforcing cavity formed between the reinforcing components and the web and upper flange. This provides excellent reinforcement to the upper flange and its surrounding area, reducing the risk of track and web eccentricity and improving stress concentration under vertical and horizontal loads caused by wheel eccentricity. This effectively ensures the durability and service life of the steel crane beam. Furthermore, the observation port on the reinforcing cavity allows for observation of the upper flange and web neck area during long-term use, further enhancing safety.

[0018] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0021] Figure 3 for Figure 2 Schematic diagram of the cross section at point AA;

[0022] Figure 4 for Figure 2 Schematic diagram of the cross section at point BB;

[0023] Reference numerals: 1-web plate; 2-upper flange; 3-lower flange; 4-transverse stiffening rib; 5-reinforcing assembly; 5a-reinforcing cavity; 5a1-observation port; 501-first longitudinal stiffening plate; 502-second longitudinal stiffening plate; 503-reinforcing tube; 6-oblique stiffening plate. Detailed Implementation

[0024] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] Please see Figures 1-4 This embodiment discloses a steel crane beam, including a beam body and a reinforcing structure disposed on the beam body. The beam body includes a web 1 and an upper flange 2 and a lower flange 3 disposed on the web 1. The reinforcing structure includes: multiple transverse stiffening ribs 4 distributed on both sides of the web 1 and arranged along the length of the web 1, and a reinforcing component 5 disposed between two adjacent transverse stiffening ribs 4. A relatively closed reinforcing cavity 5a is formed between the reinforcing component 5, the web 1, and the upper flange 2. An observation port 5a1 is provided on the reinforcing cavity 5a. It can be understood that the transverse sides of the web 1 refer to the two sides in the thickness direction of the web 1; the "transverse" in the transverse stiffening ribs 4 refers to the width direction of the web 1, that is, the side with the web 1. Figure 1 The height direction of the web 1. It is understood that the web 1 is typically welded to the upper flange 2 and lower flange 3 to form an H-shaped beam body. Crane running rails and other structures can be installed on the top of the upper flange 2. These structures are consistent with existing steel crane beam bodies and are existing technology, so they will not be elaborated here. It is conceivable that multiple transverse stiffening ribs 4 are preferably evenly distributed at equal intervals. Furthermore, the transverse stiffening ribs 4 are usually welded to the web, and the top of the transverse stiffening ribs 4 is welded to the upper flange 2. Here, the structure of the reinforcing component 5 is not limited, but a structure of multiple plates spliced ​​together is preferred. The observation port 5a1 is usually a perforated structure, allowing inspectors to observe the condition of the lower surface of the upper flange 2 and the connection between the upper flange 2 and the web 1, such as surface quality, presence of fine lines, corrosion, etc., thus effectively ensuring long-term safety and preventing accidents.

[0026] The steel crane beam structure provided above can effectively ensure the service life of the steel crane beam, and can improve the safety of the steel crane beam during long-term use. Specifically, in the steel crane beam, the transverse stiffening ribs 4 are arranged, and the reinforcing assembly 5 is arranged between the web plate 1 and the upper flange 2 to form a reinforcing cavity 5a, which can effectively strengthen the upper flange 2 and the area near the upper flange 2, reduce the risk of eccentricity between the upper flange 2 and the web plate 1, improve the stress concentration degree of the wheel under vertical and horizontal eccentric loads, and effectively ensure the service durability and service life of the steel crane beam. At the same time, the observation port 5a1 is arranged on the reinforcing cavity 5a, which can be used to observe the condition of the upper flange 2 and the neck area of the web plate 1 during long-term use, thereby improving the safety during long-term use.

[0027] In the embodiment, the reinforcing assembly 5 includes a first longitudinal stiffening plate 501 fixed to the web plate 1 and a second longitudinal stiffening plate 502 fixed to the lower surface of the upper flange 2. The longitudinal ends of the first longitudinal stiffening plate 501 are respectively fixedly connected to the adjacent two transverse stiffening ribs 4. The lower part of the second longitudinal stiffening plate 502 is fixedly connected to the first longitudinal stiffening plate 501. The reinforcing cavity 5a is formed between the web plate 1, the first longitudinal stiffening plate 501, the second longitudinal stiffening plate 502, the upper flange 2 and the adjacent two transverse stiffening ribs 4. It can be understood that the "longitudinal" mentioned here refers to the length direction of the first longitudinal stiffening plate 501 and the second longitudinal stiffening plate 502 being consistent with the length direction of the web plate 1. The "fixed" mentioned in this paragraph is preferably in the form of welding. The reinforcing assembly 5 in this structure design is simple in structure, and the first longitudinal stiffening plate 501 and the second longitudinal stiffening plate 502 are associated with the transverse stiffening ribs 4 to form a whole, which is beneficial to the connection and assembly of the web plate 1 and the transverse stiffening ribs 4, and is beneficial to reducing the manufacturing cost; at the same time, the strength of the upper flange 2 and the web plate 1 is good.

[0028] In the embodiment, the observation port 5a1 is a through hole arranged on the second longitudinal stiffening plate 502. Specifically, it is a circular through hole. It can be understood that the through hole refers to penetrating through the second longitudinal stiffening plate 502 itself. The structure of arranging the through hole on the second longitudinal stiffening plate 502 is simple in structure and is beneficial to processing and manufacturing; at the same time, it is beneficial to the observation of the monitoring personnel.

[0029] In the embodiment, a reinforcing pipe 503 is fixedly arranged at the through hole. Specifically, the reinforcing pipe 503 is welded and fixed with the second longitudinal stiffening plate 502, and the axial ends of the reinforcing pipe 503 respectively protrude beyond the transverse sides of the second longitudinal stiffening plate 502. By arranging the reinforcing pipe 503, the local weakness of the through hole can be strengthened, and the local instability of the plate can be avoided, so that the service life of the steel crane beam can be further ensured.

[0030] In the embodiment, the first longitudinal stiffener 501 is located at the upper portion of the web plate 1. Specifically, the first longitudinal stiffener 501 is preferably arranged at a position close to 1 / 3 of the height of the web plate 1. By arranging the first longitudinal stiffener 501 at the upper portion of the web plate 1, the reinforcing effect on the web plate 1 is good, which is beneficial to prevent local buckling of the plate.

[0031] In the embodiment, the reinforcing structure further comprises a plurality of diagonal stiffeners 6 arranged on the web plate 1 and distributed on both sides of the web plate 1 in the transverse direction. It can be understood that the diagonal stiffeners 6 are usually arranged between two adjacent transverse stiffeners 4. The diagonal stiffeners 6 can be flat steel or profiled steel. The diagonal direction refers to the arrangement inclined to the vertical direction. By arranging a plurality of diagonal stiffeners 6, the probability of local deformation, such as bulging, of the web plate 1 is reduced, which is beneficial to further ensure the use reliability of the steel crane girder. At the same time, the diagonal stiffeners 6 have a good reinforcing effect on the web plate 1.

[0032] In the embodiment, the diagonal stiffeners 6 are arranged in pairs on both sides of the web plate 1 in the transverse direction. It can be understood that the diagonal stiffeners 6 on both sides of the web plate 1 are arranged in alignment. The paired arrangement has a good reinforcing effect on the strength of the web plate 1.

[0033] In the embodiment, the diagonal stiffeners 6 are distributed at positions close to both ends of the web plate 1 in the length direction. Specifically, the diagonal stiffeners 6 are preferably distributed at positions within 1 / 3 of the end of the web plate 1. By distributing the diagonal stiffeners 6 at positions close to both ends of the web plate 1 in the length direction, the maximum bending moment region of the steel crane girder is avoided, the structural reliability is improved, and the number of diagonal stiffeners 6 is reduced, thereby saving manufacturing costs.

[0034] In the embodiment, the transverse stiffeners 4 are arranged in pairs on both sides of the web plate 1 in the transverse direction, and the transverse stiffeners 4 divide the corresponding side of the web plate 1 into an odd number of sections, specifically, nine sections. Of course, according to the length of the web plate 1, the web plate 1 can also be divided into other odd number of sections. It can be understood that the transverse stiffeners 4 are arranged in alignment on both sides of the web plate 1 in the transverse direction. The paired arrangement has a good reinforcing effect on the web plate 1 and the upper flange 2. The arrangement of an odd number of sections is beneficial to realize the symmetrical arrangement of the overall structure, and the transverse stiffeners 4 avoid the maximum bending moment region at the midspan, thereby improving the fatigue strength of the crane girder.

[0035] In the embodiment, the two ends of the transverse stiffening ribs 4 located at the two ends of the length direction of the web plate 1 are respectively fixedly connected with the upper flange 2 and the lower flange 3, and the bottom of the remaining transverse stiffening ribs 4 is provided with a gap with the lower flange 3. The structure design is beneficial to guarantee the connection reliability of the transverse stiffening ribs 4 at the two end beam support parts of the steel crane beam. Meanwhile, for the transverse stiffening ribs 4 in the middle region, since the lower part is provided with a gap with the lower flange 3, it is beneficial to reduce the stress concentration and fatigue failure risk of the tensile region of the lower flange 3; and the upper flange 2 part is mainly under compression, and the transverse stiffening ribs 4 can be fixedly connected with the upper flange 2.

[0036] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A steel crane beam, characterized in that: The beam includes a beam body and a reinforcing structure disposed on the beam body. The beam body includes a web (1) and an upper flange (2) and a lower flange (3) disposed on the web (1). The reinforcing structure includes: Multiple transverse stiffening ribs (4) are distributed on both sides of the web (1) and arranged along the length of the web (1), and a reinforcing component (5) is provided between two adjacent transverse stiffening ribs (4). The reinforcing component (5) forms a relatively closed reinforcing cavity (5a) between the web (1) and the upper flange (2). The reinforcing cavity (5a) is provided with an observation port (5a1).

2. The steel crane beam according to claim 1, characterized in that: The reinforcing component (5) includes a first longitudinal stiffening plate (501) fixed on the web (1) and a second longitudinal stiffening plate (502) fixed on the lower surface of the upper flange (2). The longitudinal ends of the first longitudinal stiffening plate (501) are respectively fixedly connected to two adjacent transverse stiffening ribs (4). The lower part of the second longitudinal stiffening plate (502) is fixedly connected to the first longitudinal stiffening plate (501). The reinforcing cavity (5a) is formed between the web (1), the first longitudinal stiffening plate (501), the second longitudinal stiffening plate (502), the upper flange (2), and the two adjacent transverse stiffening ribs (4).

3. The steel crane beam according to claim 2, characterized in that: The observation port (5a1) is a through hole provided on the second longitudinal stiffening plate (502).

4. The steel crane beam according to claim 3, characterized in that: A reinforcing tube (503) is fixed at the through hole.

5. The steel crane beam according to claim 2, characterized in that: The first longitudinal stiffening plate (501) is located at the upper part of the web (1).

6. The steel crane beam according to claim 1, characterized in that: The reinforcement structure also includes several diagonal stiffening plates (6) disposed on the web (1) and distributed on both sides of the web (1) laterally.

7. The steel crane beam according to claim 6, characterized in that: The oblique stiffening plates (6) are arranged in pairs on both sides of the web (1) in the transverse direction.

8. The steel crane beam according to claim 7, characterized in that: The oblique stiffening plates (6) are distributed at both ends of the web plate (1) along its length.

9. The steel crane beam according to claim 1, characterized in that: The transverse stiffening ribs (4) are arranged in pairs on both sides of the web (1), and the transverse stiffening ribs (4) divide the corresponding sides of the web (1) into an odd number of segments.

10. The steel crane beam according to claim 1, characterized in that: The two ends of the transverse stiffening ribs (4) located at both ends of the web (1) along the length direction are fixedly connected to the upper flange (2) and the lower flange (3) respectively. The bottom of the remaining transverse stiffening ribs (4) is provided with a gap between the lower flange (3) and the bottom of the lower flange (3).

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