A shock-absorbing and energy-absorbing support device for a converter transformer valve side raised seat

Abstract

The present invention relates to a shock-absorbing energy-absorbing support device for a valve-side raised seat of a converter transformer, and belongs to the technical field of manufacturing and maintenance of power transmission and transformation equipment. The technical scheme is: a support arm (2) is fixed on a converter transformer body (1), a shock-absorbing crossbeam (3) is fixed on the support arm (2), one end of two support square steels (6) are respectively fixed on the two ends of the shock-absorbing crossbeam (3), and the other ends of the two support square steels (6) are both fixed on the valve-side raised seat (10), the two support square steels are fixed on the valve-side raised seat at positions close to the valve-side bushing (11), and a triangular structure is formed between the two support square steels (6) and the shock-absorbing crossbeam (3); an energy-absorbing beam (7) is provided between the two support square steels. The present invention can effectively solve the problem of the overall strength of the valve-side system of the converter transformer during transportation, testing or on-site placement in the factory, so that the stiffness of the valve-side raised seat matches the stiffness of the valve-side bushing, and prevents the valve-side bushing from root fracture during earthquake conditions.

Description

Technical Field

[0001] The invention relates to a shock-absorbing and energy-absorbing supporting device for a valve-side elevated seat of a converter transformer, and belongs to the technical field of manufacturing and maintenance of power transmission and transformation equipment. Background Art

[0002] With the development of science and technology, the capacity of my country's power transmission projects has been continuously improved, and the capacity of converter transformers has also increased accordingly. The current of the valve side bushing has increased, resulting in an increase in the diameter of the valve side riser seat. The overall weight of the valve side outgoing line system has increased proportionally, resulting in insufficient support strength for the existing converter transformer valve side riser seat, and even causing the valve side bushing and the riser seat fixing bolts to break.

[0003] At present, the conventional strengthening measure for the valve side riser of the converter transformer is to install a floor support under the valve side riser. This structure can only be used for installation after the converter transformer is in place at the converter station. The floor support structure cannot be installed during the transportation, testing and on-site installation of the converter transformer in the factory. During this process, the strength of the valve side riser of the converter transformer cannot be guaranteed, which poses a very large safety hazard.

[0004] In addition, my country's resources are concentrated in the western region, which has the characteristics of high seismic intensity and high altitude. With high seismic intensity, the valve-side outlet system requires higher mechanical seismic strength; with high altitude, the bushing requires a higher air clearance, that is, the bushing is longer, its weight and torque are greater, and there are higher requirements for the mechanical seismic strength of the valve-side outlet system. The existing support structure of the valve-side elevation seat of the converter transformer is a hard connection. Although it can also enhance its static structural strength, it also increases the stiffness of the valve-side elevation seat of the converter transformer, resulting in a mismatch between the stiffness of the valve-side elevation seat and the valve-side bushing. When an earthquake occurs, it is more likely to cause the root of the valve-side bushing to break, which cannot meet the seismic requirements. Summary of the invention

[0005] The purpose of the present invention is to provide a shock-absorbing and energy-absorbing support device for a valve-side riser seat of a converter transformer, which can effectively solve the problem of the overall strength of the valve-side system of the converter transformer during transportation, testing or on-site installation within the factory, so that the stiffness of the valve-side riser seat matches the stiffness of the valve-side bushing, thereby preventing the valve-side bushing from root fracture during earthquake conditions and solving the problems existing in the background technology.

[0006] The technical solution of the present invention is:

[0007] A shock-absorbing energy-absorbing support device for a valve-side raised seat of a converter transformer comprises a converter transformer body, a valve-side raised seat and a valve-side sleeve, wherein the converter transformer body is provided with a valve-side raised seat, and the valve-side sleeve is provided on the valve-side raised seat; the special feature of the device is that a support arm is provided at the lower end of the converter transformer body, and a shock-absorbing energy-absorbing support structure is provided between the support arm and the valve-side raised seat; the shock-absorbing energy-absorbing support structure comprises a shock-absorbing crossbeam, a supporting square steel and an energy-absorbing beam, the shock-absorbing crossbeam is fixed on the supporting arm, one end of two supporting square steels are respectively fixed at two ends of the shock-absorbing crossbeam, and the other ends of the two supporting square steels are both fixed on the valve-side raised seat, the fixed positions of the two supporting square steels on the valve-side raised seat are close to the valve-side sleeve, and a triangular structure is formed between the two supporting square steels and the shock-absorbing crossbeam; an energy-absorbing beam is provided between the two supporting square steels, and the energy-absorbing beam comprises two thin square steels and a spring sleeve, one end of the two thin square steels are respectively fixed on the two supporting square steels, and the other ends of the two thin square steels are connected to two ends of the spring sleeve through flanges.

[0008] The shock-absorbing cross beam is composed of an I-beam and hydraulic damping sleeves arranged at both ends of the I-beam. The I-beam is fixed on the support arm, and the I-beam and the support arm are arranged vertically.

[0009] The cross section of the supporting square steel is larger than the cross section of the thin square steel.

[0010] The triangular structure formed between the two supporting square steels and the shock-absorbing crossbeam is an isosceles triangle.

[0011] There are two valve-side raised seats on the converter transformer body arranged up and down, and a shock-absorbing and energy-absorbing support structure with the same structure is provided between the two valve-side raised seats and the support arms.

[0012] The beneficial effects of the present invention are:

[0013] (1) The shock-absorbing and energy-absorbing support structure of the present invention is integrally fixed on the converter transformer body, solving the problem of supporting the body of the valve-side outgoing line system during the process of in-plant transportation, testing or on-site installation of the converter transformer;

[0014] (2) The present invention can generate damping displacement within a certain safety limit in the up-down, left-right, and front-back directions, thereby reducing the system rigidity of the lifting seat and the supporting structure, making the rigidity of the valve side lifting seat and the sleeve better matched, and avoiding the root fracture of the sleeve;

[0015] (3) The two valve side raised seats arranged up and down are each equipped with their own shock-absorbing and energy-absorbing support structures, which are independent of each other and do not interfere with each other, thus improving reliability;

[0016] (4) Under normal conditions, the supporting square steel and shock-absorbing beam can provide sufficient support for the valve side raised seat;

[0017] (5) Under normal vibration and minor earthquake conditions, the energy absorption and earthquake resistance effect can be achieved by utilizing the elasticity of the I-beam in the shock-absorbing beam and the damping displacement of the damping sleeve and the spring sleeve on the energy-absorbing beam;

[0018] (6) When an extreme earthquake occurs, the stress concentration point of the shock-absorbing energy-absorbing support structure of the present invention is on the energy-absorbing beam, which will be destroyed first, thereby protecting the valve-side riser, the valve-side casing and the main structure of the shock-absorbing energy-absorbing support structure. Moreover, the energy-absorbing beam can be easily replaced after being destroyed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the shock-absorbing and energy-absorbing support structure;

[0021] In the figure: converter transformer body 1, support arm 2, shock absorbing beam 3, I-beam 4, hydraulic damping sleeve 5, supporting square steel 6, energy absorbing beam 7, thin square steel 8, spring sleeve 9, valve side rising seat 10, valve side sleeve 11. DETAILED DESCRIPTION

[0022] The present invention will be further described below by way of examples with reference to the accompanying drawings.

[0023] See attached Figure 1 , 2 A converter transformer valve side elevation seat shock absorption energy absorption support device comprises a converter transformer body 1, a valve side elevation seat 10 and a valve side bushing 11, the converter transformer body 1 is provided with a valve side elevation seat 10, and the valve side bushing 11 is provided on the valve side elevation seat 10; the special feature is that: a support arm 2 is provided at the lower end of the converter transformer body 1, and a shock absorption energy absorption support structure is provided between the support arm 2 and the valve side elevation seat 10; the shock absorption energy absorption support structure comprises a shock absorption cross beam 3, a supporting square steel 6 and an energy absorption beam 7, the shock absorption cross beam 3 is fixed on the support arm 2, and two support One end of the square steel 6 is fixed on both ends of the shock-absorbing beam 3, and the other ends of the two supporting square steels 6 are fixed on the valve-side elevated seat 10. The fixed positions of the two supporting square steels 6 on the valve-side elevated seat 10 are close to the valve-side sleeve 11, and a triangular structure is formed between the two supporting square steels 6 and the shock-absorbing beam 3; an energy-absorbing beam 7 is provided between the two supporting square steels 6, and the energy-absorbing beam 7 comprises two thin square steels 8 and a spring sleeve 9, and one ends of the two thin square steels 8 are fixed on the two supporting square steels 6, and the other ends of the two thin square steels 8 are connected to both ends of the spring sleeve 9 through flanges.

[0024] In this embodiment, refer to the attached Figure 1 , 2The support arm 2 is fixed to the converter transformer body 1 by bolts, and a shock-absorbing crossbeam 3 is installed on the support arm 2. The shock-absorbing crossbeam 3 is composed of a semi-open I-beam 4 and a shock-absorbing hydraulic damping sleeve 5 arranged at the end. Two supporting square steels 6 are fixed on the I-beam 4. The two supporting square steels 6 are in an eight-shaped shape, and the other ends of the two supporting square steels 6 are fixed on the valve side elevation seat 10 of the converter transformer. An energy-absorbing beam 7 is arranged between the two supporting square steels 6. The energy-absorbing beam 7 is composed of two thin square steels 8 and a spring sleeve 9 in the middle. The thin square steel 8 and the spring sleeve 9 are connected by flanges for easy disassembly. The shock-absorbing crossbeam 3, the two eight-shaped supporting square steels 6 and the energy-absorbing beam 7 form a set of shock-absorbing energy-absorbing support structures, and the upper and lower valve side elevation seats 10 each use a set of shock-absorbing energy-absorbing support structures.

[0025] Under normal conditions, the supporting square steel 6 and the shock-absorbing cross beam 3 can provide sufficient support for the valve side elevation seat; under normal vibration and minor earthquake conditions, the elasticity of the half-open I-beam 4 on the shock-absorbing cross beam 3, as well as the damping displacement of the damping sleeve 5 and the spring sleeve 9 on the energy-absorbing beam can achieve energy absorption and earthquake resistance effects; when extreme earthquake conditions occur, since the thin square steel 8 on the energy-absorbing beam 3 is thinner, stress is concentrated there, and it can be destroyed first, playing a role in earthquake resistance and energy absorption, protecting the valve side elevation seat, valve side sleeve and supporting body of the converter transformer. The various components of the structure of the present invention are connected by flanges or bolts, which is convenient for disassembly.

Claims

1. A converter transformer valve side elevation seat shock absorption and energy absorption support device, comprising a converter transformer body (1), a valve side elevation seat (10) and a valve side bushing (11), wherein the converter transformer body (1) is provided with the valve side elevation seat (10), and the valve side bushing (11) is provided on the valve side elevation seat (10); the characteristics are: A support arm (2) is provided at the lower end of the converter transformer body (1), and a shock-absorbing energy-absorbing support structure is provided between the support arm (2) and the valve-side raised seat (10); the shock-absorbing energy-absorbing support structure comprises a shock-absorbing crossbeam (3), a support square steel (6) and an energy-absorbing beam (7); the shock-absorbing crossbeam (3) is fixed to the support arm (2), one end of two support square steels (6) are respectively fixed to two ends of the shock-absorbing crossbeam (3), and the other ends of the two support square steels (6) are both fixed to the valve-side raised seat (10); the fixed positions of the two support square steels (6) on the valve-side raised seat (10) are close to the valve-side sleeve (11), and between the two support square steels (6) and the shock-absorbing crossbeam (3) A triangular structure is formed; an energy absorbing beam (7) is provided between the two supporting square steels (6); the energy absorbing beam (7) comprises two thin square steels (8) and a spring sleeve (9); one end of the two thin square steels (8) are respectively fixed to the two supporting square steels (6); the other ends of the two thin square steels (8) are connected to the two ends of the spring sleeve (9) through flanges; the shock absorbing cross beam (3) is composed of an I-beam (4) and a hydraulic damping sleeve (5) arranged at both ends of the I-beam (4); the I-beam (4) is fixed to the supporting arm (2); the I-beam (4) and the supporting arm (2) are arranged perpendicularly; the cross section of the supporting square steel (6) is larger than the cross section of the thin square steel (8).

2. According to claim 1, a converter transformer valve side elevated seat shock absorption and energy absorption support device is characterized in that: The triangular structure formed between the two supporting square steels (6) and the shock-absorbing crossbeam (3) is an isosceles triangle.

3. A converter transformer valve side elevated seat shock absorption and energy absorption support device according to claim 1 or 2, characterized in that: The valve side raised seats (10) on the converter transformer body (1) are two valve side raised seats (10) arranged in an upper and lower manner, and a shock-absorbing and energy-absorbing support structure having the same structure is provided between the two valve side raised seats (10) and the support arm (2).

Images