A support structure and method for boiler equipment

Abstract

The present invention belongs to the technical field of boiler support structure, and particularly relates to a support structure and method for boiler equipment. The technical scheme is as follows: a support structure for boiler equipment comprises a frame, and a plurality of curved beams are connected to the frame. The curved beams are arc-shaped, and the curvature center of the curved beams is on the center line of the boiler equipment. The curved beams are connected to the boiler equipment at a plurality of points. The present invention provides a support structure and method for boiler equipment with a simple structure and convenient installation.

Description

Technical Field

[0001] The invention belongs to the technical field of boiler support structures, and in particular relates to a support structure and method for boiler equipment. Background Art

[0002] In power station service equipment, such as the root beam of the CFB boiler cyclone separator and the root beam of the coal hopper in the coal bunker, the conventional connection method is to set up several spacer beams and secondary beams according to the root position of the lifting point. Figure 5 As shown, when the boiler equipment is supported by the root beam, the spacer and the secondary beam, a spacer needs to be set at each connection point of the boiler equipment, so the structure is complicated and the on-site installation work is large. In addition, this method of supporting the boiler equipment makes the supporting device neither economical nor beautiful. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the object of the present invention is to provide a boiler equipment supporting structure and method which has a simple structure and is easy to install.

[0004] The technical solution adopted by the present invention is:

[0005] A supporting structure of a boiler device comprises a frame, a plurality of curved beams are connected to the frame, the curved beams are arc-shaped, the curvature centers of the curved beams are on the center line of the boiler device, and the curved beams are connected to the boiler device at a plurality of points.

[0006] The connection points on the boiler equipment are distributed in a circular shape, which can ensure that the boiler equipment is evenly stressed. The curved beam of the present invention is concentric with the boiler equipment, so the curved beam can be connected to the boiler equipment at multiple points. Therefore, only a few curved beams are needed to complete the support of all the connection points of the boiler equipment. Compared with using root beams, secondary beams and spacers to support the boiler equipment, the present invention can simplify the structure of the support device and is more convenient to install. With a simplified structure, the present invention is more economical and beautiful.

[0007] As a preferred solution of the present invention, the curved beam is supported by three points on the frame. The middle and both ends of the curved beam are supported by the frame, thereby ensuring the stability of the curved beam and preventing the curved beam from being deformed by the multi-point forces of the boiler equipment.

[0008] As a preferred solution of the present invention, the two ends of the curved beam are respectively hinged to the frame, the middle of the curved beam is connected to a support, and the other end of the support is hinged to the frame. The curved beam and the support are both hinged to the frame to avoid stress concentration during direct welding. The support can reliably support the middle of the curved beam, thereby ensuring that the curved beam stably supports the boiler equipment.

[0009] As a preferred solution of the present invention, the number of the curved beams is three, and the three curved beams are evenly distributed and located on the same circular path. The three curved beams are evenly distributed on the same circle, so that the three curved beams can reliably support the boiler equipment.

[0010] As a preferred solution of the present invention, the central angle of the curved beam is greater than 0° and less than or equal to 90°. The curved beam should not be too long to avoid bending or collapse of the curved beam.

[0011] A method for supporting a boiler device comprises the following steps:

[0012] S1: Connect several curved beams to the frame so that the center of curvature of the curved beams is located on the center line of the boiler equipment;

[0013] S2: Connect the curved beam to the boiler equipment at several points.

[0014] As a preferred solution of the present invention, in step S1, a plurality of curved beams are arranged on the same circular path.

[0015] As a preferred solution of the present invention, in step S1, the curved beam and the frame are supported by three points.

[0016] As a preferred solution of the present invention, both ends of the curved beam are respectively hinged to the frame, a support is connected to the middle of the curved beam, and the other end of the support is hinged to the frame.

[0017] As a preferred embodiment of the present invention, the central angle of the curved beam is greater than 0° and less than or equal to 90°.

[0018] The beneficial effects of the present invention are:

[0019] The curved beam of the present invention is concentric with the boiler equipment, so the curved beam can be connected to the boiler equipment at multiple points. Therefore, only a few curved beams are needed to complete the support of all the connection points of the boiler equipment. Compared with using root beams, secondary beams and spacers to support the boiler equipment, the present invention can simplify the structure of the support device and is more convenient to install. In the case of a simplified structure, the present invention is more economical and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 Force analysis diagram of a single curved beam;

[0022] Figure 3 yes Figure 1 Schematic diagram of the structure at AA in the middle;

[0023] Figure 4 yes Figure 1 Schematic diagram of the structure at BB in the middle;

[0024] Figure 5 It is a structural schematic diagram of the prior art.

[0025] In the figure: 1-frame; 2-curved beam; 3-support. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0028] like Figure 1 to Figure 4 As shown, a supporting structure of a boiler equipment in this embodiment includes a frame 1, and a plurality of curved beams 2 are connected to the frame 1. The curved beams 2 are arc-shaped, and the center of curvature of the curved beams 2 is on the center line of the boiler equipment. The curved beams 2 are connected to the boiler equipment at several points.

[0029] The boiler equipment in this embodiment refers to a CFB boiler hanging cyclone separator or a coal hopper between coal bunkers, etc. In this embodiment, a curved beam 2 is set in combination with factors such as the curvature radius of the hanging point position and the hanging point spacing. A single circular equipment is suspended by one to three curved beams 2, and the curved beam 2 is a steel box beam.

[0030] The connection points on the boiler equipment are distributed in a circular shape, which can ensure that the boiler equipment is evenly stressed. The curved beam 2 of the present invention is concentric with the boiler equipment, so the curved beam 2 can be connected to the boiler equipment at multiple points. Therefore, only a few curved beams 2 are needed to complete the support of all the connection points of the boiler equipment. Compared with using root beams, secondary beams and spacers to support the boiler equipment, the present invention can simplify the structure of the support device and is more convenient to install. With a simplified structure, the present invention is more economical and beautiful.

[0031] Specifically, the curved beam 2 is supported by three points on the frame 1. The middle and both ends of the curved beam 2 are supported by the frame 1, thereby ensuring the stability of the curved beam 2 and preventing the curved beam 2 from being deformed by the multi-point force of the boiler equipment. The two ends of the curved beam 2 are respectively hinged to the frame 1, and the middle of the curved beam 2 is connected to a support 3, and the other end of the support 3 is hinged to the frame 1. The curved beam 2 and the support 3 are both hinged to the frame 1 to avoid stress concentration during direct welding. The support 3 can reliably support the middle part of the curved beam 2, and accordingly ensure that the curved beam 2 stably supports the boiler equipment.

[0032] In order to provide more uniform support for the boiler equipment, the number of the curved beams 2 is preferably three, and the three curved beams 2 are evenly distributed and located on the same circular path. The three curved beams 2 are evenly distributed on the same circle, so that the three curved beams 2 can reliably support the boiler equipment.

[0033] The central angle of the curved beam 2 is greater than 0° and less than or equal to 90°. The curved beam 2 should not be too long to avoid bending or collapse of the curved beam 2.

[0034] When designing curved beam 2, the section was initially selected based on the flange width-to-thickness ratio and web height-to-thickness ratio of curved beam 2 in Section 6.2.4 of the steel structure design standard GB50017-2017. Considering the overall stability factor, a box section was selected. According to the book "Curved Beams" published by Chinese scholar Yao Lingsen, the negative bending moment and shear force of the middle support of curved beam 2 were calculated, and the overall stress condition of curved beam 2 was analyzed by finite element simulation. Use sweeping to create a three-dimensional solid curved beam 2 component with a length unit of millimeters, and then create a stiffened plate, ear plate, lateral support, and support beam. Here, only a section of the length around the support part of the three beams supporting curved beam 2 below is taken, and the section consolidation at the truncation of the support beam is simplified and simulated. The material is Q355B, with a density of 7850kg / m3, an elastic modulus E=206×109N / m2, and a Poisson's ratio of 0.3. Each component interacts with each other through binding. Each loading point corresponds to a position. A stiffened plate is set in the beam. The upper side of the stiffened plate is not bound at the contact with the upper wing plate. A reference point is set at each ear plate hole. After the reference point is coupled with the hole, a concentrated force of 274400N is applied. Set the mesh shape to tetrahedron and divide the mesh.

[0035] Since the effects of stiffened plates and lateral supports were not considered in the previous theoretical calculations, and the form of support 3 in the actual project was somewhat different from the simplified support 3 in the theoretical calculations, the maximum stress and the maximum stress position also changed in the finite element simulation results. From the simulation results, it can be seen that the maximum stress is 279.3MPa, and the maximum stress position is roughly at the contact edge between the beam and the left support beam; the maximum deflection is 1.75mm<L / 500=5.85mm, which meets the requirements.

[0036] With conventional design, many lattice beams and secondary beams are required. The weight of the spacer beam required to hang one separator is about 8t. With the curved beam 2 design, only 5t is needed. If there are six separators in one boiler, the weight can be saved by (8×6-5×6) / (8×6)=37.5%. It can be seen that with the curved beam 2 design, all hanging points are concentrated on one beam, giving full play to the principle of concentrated material utilization, which can greatly reduce the weight and the workload of on-site installation. In this way, in boiler design, the curved beam 2 design can be used in all annular supported equipment or pipelines.

[0037] The supporting method of the boiler equipment of this embodiment includes the following steps:

[0038] S1: Connect a plurality of curved beams 2 to the frame 1 so that the center of curvature of the curved beams 2 is located on the center line of the boiler equipment;

[0039] S2: Connect the curved beam 2 to the boiler equipment at several points.

[0040] In step S1 , a plurality of curved beams 2 are arranged on the same circular path.

[0041] In step S1 , the curved beam 2 and the frame 1 are supported by three points.

[0042] Both ends of the curved beam 2 are respectively hinged to the frame 1 , a support 3 is connected to the middle of the curved beam 2 , and the other end of the support 3 is hinged to the frame 1 .

[0043] The central angle of the curved beam 2 is greater than 0° and less than or equal to 90°.

[0044] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A supporting structure for a boiler equipment, characterized in that: The invention comprises a frame (1), the frame (1) is connected to three curved beams (2), the curved beams (2) are arc-shaped, the curvature center of the curved beams (2) is on the center line of the boiler equipment, and the curved beams (2) are connected to the boiler equipment at a plurality of points; the curved beams (2) and the frame (1) are supported by three points; the two ends of the curved beams (2) are respectively hinged to the frame (1), the middle of the curved beams (2) is connected to a support (3), and the other end of the support (3) is hinged to the frame (1); the three curved beams (2) are evenly distributed and located on the same circular path.

2. The supporting structure of a boiler equipment according to claim 1, characterized in that: The central angle of the curved beam (2) is greater than 0° and less than or equal to 90°.

3. A method for supporting boiler equipment, using the supporting structure of boiler equipment according to claim 1, characterized in that: The following steps are involved: S1: Connect three curved beams (2) to the frame (1) so that the center of curvature of the curved beams (2) is located on the center line of the boiler equipment; S2: Connect the curved beam (2) to the boiler equipment at several points; In step S1, three curved beams (2) are arranged on the same circular path; In step S1, the curved beam (2) and the frame (1) are supported at three points; Both ends of the curved beam (2) are respectively hinged to the frame (1); the middle of the curved beam (2) is connected to a support (3); and the other end of the support (3) is hinged to the frame (1).

4. A method for supporting boiler equipment according to claim 3, characterized in that: The central angle of the curved beam (2) is greater than 0° and less than or equal to 90°.

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