CN1641797A - Damper-free support system for modular high temperature air-cooled pile pressure casing - Google Patents

Abstract

The invention relates to a damper-free support system for a modular high-temperature gas-cooled reactor pressure shell, which belongs to the technical field of nuclear equipment. The purpose of the present invention is to solve the contradiction between the unreliability of the large damper and the high reliability operation of the reactor, and provide a safe and reliable mechanical device to replace the support system with the damper. The invention discloses a support system without a damper, which comprises the first main load-bearing support arranged at the height of the axis of the hot gas conduit to connect the reactor pressure shell and the biological shielding layer, and arranged at the height of the axis of the hot gas conduit to connect the pressure shell of the steam generator and the second main load-bearing support of the biological shielding layer, the first lateral support arranged on the upper part of the reactor pressure vessel connecting the reactor pressure vessel and the biological shielding layer, and the connecting steam generators respectively arranged on the upper and lower parts of the steam generator pressure vessel Secondary lateral support for pressure hull and bio-shield. The use of the invention can ensure the effective support and anti-seismic performance of the equipment, and the manufacturing cost is low.

Description

Damperless support system for pressure vessel of modular high temperature gas-cooled reactor

technical field

The invention relates to a support system for a pressure shell of a modular high-temperature gas-cooled reactor, and belongs to the technical field of nuclear equipment.

Background technique

Since both the reactor pressure vessel and the steam generator pressure vessel are very tall and heavy devices, large dampers are used in the design of the supporting structure to allow thermal expansion between components and to relieve the seismic load zone by the dampers during an earthquake coming shock.

The disadvantage of the support system using the damper is that the damper is prone to failure and requires high operation and maintenance, and once the damper fails, the reactor pressure vessel and the steam generator pressure vessel may tilt, stretch or compress The middle part connecting the two pressure shells—the hot gas conduit pressure shell, causes excessive compressive stress or tensile stress, which endangers the safety of the pressure boundary and affects the safe operation of the reactor. Also, large dampers are expensive.

Contents of the invention

The purpose of the present invention is to solve the contradiction between the unreliability of the large damper and the high reliability operation of the reactor, to provide a safe and reliable mechanical device, which replaces the support system with the damper, and under various possible working conditions , no excessive stress appears on the pressure boundary to ensure the safety of the pressure boundary components. On this premise, the complexity of the structure is reduced, and the manufacturing cost of the supporting system is reduced.

The invention provides a damper-free support system for the pressure shell of a modular high-temperature gas-cooled reactor. The pressure shell of the modular high-temperature gas-cooled reactor includes a reactor pressure shell and a steam generator pressure shell connected to each other through a hot gas conduit. Its features In that said damperless bearing system comprises

The first main load-bearing support connecting the reactor pressure vessel and the biological shielding layer arranged at the height of the axis of the hot gas conduit is used to prevent the reactor pressure vessel from rotating and axially shifting;

The second main load-bearing support connecting the steam generator pressure shell and the biological shielding layer arranged at the height of the hot gas conduit axis is used to prevent the axial displacement of the steam generator pressure shell;

A first lateral support connecting the reactor pressure vessel and the bio-shielding layer arranged on the upper part of the reactor pressure vessel to prevent the circumferential rotation of the reactor pressure vessel; and

The second lateral supports connecting the steam generator pressure shell and the biological shielding layer respectively arranged at the upper part and the lower part of the steam generator pressure shell are used to prevent the steam generator pressure shell from rotating in the circumferential direction.

Both the first main load-bearing support and the second main load-bearing support of the present invention include

1) The biological shielding layer riser fixed on the biological shielding layer by the first fixing bolt and the first fixing nut;

2) The biological shielding layer flat plate and the vertical support plate welded on the biological shielding layer vertical plate, the vertical support plate supports the biological shielding layer flat plate from the bottom, and is welded together with it, the surface of the biological shielding layer flat plate is provided with sliding groove;

3) the pressure shell welding flat plate and the vertical tie bars welded on the outer wall of the pressure shell, and the vertical tie bars and the pressure shell welding flat plate are welded together;

4) An excessive guide plate arranged in the chute on the flat surface of the biological shielding layer;

5) The transition groove plate welded on the transition guide plate;

6) The upper guide plate welded on the transition groove plate, the surface of the upper guide plate is provided with a groove, and the outer lower end of the welded plate of the pressure shell is supported in the groove of the upper guide plate.

Both the first lateral support and the second lateral support of the present invention include

1) Horizontal lugs with grooved ends welded on the outer wall of the pressure vessel;

2) The left rotating frame and the right rotating frame connected together by cylindrical pins and horizontal lifting lugs, the other ends of the left rotating frame and the right rotating frame are respectively opened with through holes, and a convex shaft is arranged in the through holes, and the two Each rotating frame is respectively connected with the rotating frame support through the convex shaft, and the rotating frame support is fixed on the biological shielding layer through bolt connection;

3) The inner upper sleeve is set on the upper part of the cylindrical pin and embedded in the left and right rotating frames, so that the rotation of the two rotating frames relative to the horizontal lugs is more flexible;

4) The inner intermediate sleeve set in the middle of the cylindrical pin and embedded in the horizontal lug makes the rotation of the horizontal lug more flexible;

5) The outer upper sleeve, which is set on the upper part of the convex shaft and embedded in the support of the rotating frame, makes the rotation of the two rotating frames relative to the convex shaft more flexible;

6) The outer middle sleeve which is sleeved in the middle of the convex shaft and embedded in the left rotating frame or the right rotating frame makes the rotation of the two rotating frames relative to the convex shaft more flexible.

The present invention includes two parts, the main load-bearing support and the lateral support. The structures and functions of these two parts are different, and the installation positions on the pressure shell are also different. The two parts complement each other and play a supporting role together. The main load-bearing support of the reactor pressure vessel plays a central role in positioning the pressure vessel, and prevents the pressure vessel from rotating and axially displacing, but allows the pressure vessel to have free thermal expansion in the radial direction. The main load-bearing support of the pressure shell of the steam generator is only limited to no axial displacement at each support, but horizontal displacement is allowed, so that the pressure shell can thermally expand freely, but no axial displacement. At different positions of the reactor pressure vessel and the steam generator pressure vessel, lateral supports are arranged at the same time to limit the rotational displacement and horizontal displacement of the pressure vessel in the circumferential direction and improve the anti-seismic performance of the structure. In this way, through the main load-bearing support and lateral support, not only the axial displacement of the pressure shell is limited, but also the horizontal displacement is limited, so that the pressure shell is fixed and has anti-seismic performance.

Description of drawings

Figure 1 is a front view of the damperless support system.

Figure 2 is a top view of the damperless support system.

Fig. 3 is a cross-sectional view of the first main load-bearing support of the present invention.

Fig. 4 is a top view of the first main bearing support according to the present invention.

Fig. 5 is a sectional view of the first lateral support according to the present invention.

Fig. 6 is a top view of the first lateral support according to the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

The modular high-temperature gas-cooled reactor pressure vessel of the present invention includes a reactor pressure vessel 1 and a steam generator pressure vessel 7 connected to each other through a hot gas conduit 6 . The damper-free support system of the modular high-temperature gas-cooled reactor pressure vessel of the present invention includes the first main load-bearing support 4 connecting the reactor pressure vessel 1 and the biological shielding layer 8 arranged on the height of the hot gas conduit 6 axis, in order to prevent the reactor The pressure shell 1 rotates and axially displaces; the second main load-bearing support 3 connecting the pressure shell of the steam generator 7 and the biological shielding layer 8 arranged at the height of the axis of the hot gas conduit 6 is used to prevent the pressure shell 7 of the steam generator from Displacement; the first lateral support 2 that is arranged on the upper part of the reactor pressure vessel 1 and connects the reactor pressure vessel 1 and the biological shielding layer 8 is used to prevent the reactor pressure vessel 1 from rotating in the circumferential direction; and is respectively arranged on the steam generator pressure vessel 7 The upper and lower second lateral supports 5 connecting the steam generator pressure shell 7 and the biological shielding layer 8 are used to prevent the steam generator pressure shell 7 from rotating in the circumferential direction.

As shown in Fig. 1 and Fig. 2, the first main bearing supports 4 are evenly distributed in the circumferential direction outside the reactor pressure vessel 1, and there are four in total. There are four second main bearing supports 3 circumferentially evenly distributed on the outside of the pressure shell 7 of the steam generator. The four first main load-bearing supports 4 on the outside of the reactor pressure vessel 1 are also respectively positioned on the surrounding biological shielding layer (i.e. the biological shielding cement wall) by lateral bolts, they will play a central positioning role for the reactor pressure vessel 1, and Prevent rotation and axial displacement of the pressure shell, but allow free thermal expansion of the pressure shell in the radial direction. The four second main load-bearing supports 3 of the pressure shell 5 of the steam generator are only limited to no axial displacement at each support, but allow horizontal displacement, so that the pressure shell can thermally expand freely, but cannot have axial displacement. to the displacement.

The structure of the first main load-bearing support and the second main load-bearing support in the present invention is the same, and an embodiment of the load-bearing support will be described in detail by taking the first main load-bearing support as an example. As shown in Figures 3 and 4, the specific structure of the first main load-bearing support is: the pressure shell welded flat plate 9 is welded on the outer wall of the pressure shell 1, and its upper vertical tie bars 18 are also welded on the pressure shell. The pressure shell welding plates 9 are welded together. The outer lower end of the pressure shell welding plate 9 is supported on the upper guide plate 10, and the surface of the upper guide plate 10 is provided with grooves to allow the relative displacement of the pressure shell welding plate 9 therein. The upper guide plate 10 is welded together with the transition guide plate 12 through the transition groove plate 11, and like this, the upper guide plate 10, the transition groove plate 11 and the transition guide plate 12 can move as a whole. The lower portion of the transitional guide plate 12 is supported on the flat plate 13 of the biological shielding layer. A chute is provided on the surface of the biological shielding layer plate 13 to allow the relative displacement of the excessive guide plate 12 . The biological shielding layer flat plate 13 is welded on the biological shielding layer vertical plate 14, and the bottom has a vertical support plate 17 welded together with the biological shielding layer flat plate 13 to support the biological shielding layer flat plate 13, while the vertical support plate 17 is also welded on the biological shielding layer flat plate 13. on the shielding layer 8. The riser 14 of the biological shielding layer is fixed on the biological shielding layer 8 through the first fixing bolt 15 and the first fixing nut 16 .

According to the difference in weight and height between the reactor pressure vessel and the steam generator pressure vessel, the lateral supports of the two pressure vessels are also treated differently, and the number of lateral supports of the two pressure vessels is slightly different.

As shown in Figures 1 and 2, four first lateral supports 2 are provided on the upper outer wall of the reactor pressure vessel 1, and radial and axial displacements along the pressure vessel are allowed at the support points, but not allowed. The supporting point has rotational displacement along the circumferential direction of the pressure shell. The thermal expansion of the pressure shell is not restricted, but the horizontal displacement and rotation of the pressure shell are completely restricted. In this way, the first lateral support and the first main load-bearing support play the role of anti-seismic support and load-bearing support for the reactor pressure vessel.

There are three second lateral supports 5 on the upper and lower parts of the steam generator pressure shell 7, two second lateral supports 5 are on the upper part of the steam generator pressure shell 7, and one lateral support 5 is on the steam generator pressure shell 7 lower part. The second lateral support 5 limits the horizontal displacement of the steam generator pressure shell 7 in the direction perpendicular to the axis of the hot gas conduit 6, and can withstand the horizontal seismic force in this direction. The four second main load-bearing supports 3 limit the generation of steam caused by the earthquake. The shaking of the pressure shell 7 of the steam generator makes the whole steam generator pressure shell 7 have an anti-shock function.

The structure of the first lateral support and the second lateral support in the present invention is the same, and an embodiment of the lateral support will be described in detail by taking the first lateral support as an example. As shown in Figures 5 and 6, the specific structure of the first lateral support is: a horizontal lug 19 welded on the outer wall of the pressure vessel with a slot at the end; connected with the horizontal lug 19 through a cylindrical pin 21 The left rotating frame 23 and the right rotating frame 24, the other end of the left rotating frame 23 and the right rotating frame 24 also have through holes respectively, are provided with convex shaft 27 in the through hole, two rotating frames pass through the convex shaft 27 respectively. Connected with the rotating frame support 30, the rotating frame support 30 is fixed on the biological shielding layer 8 through bolt connection; the inner upper sleeve 22 is sleeved on the upper part of the cylindrical pin 21 and embedded in the left rotating frame 23 and the right rotating frame 24, The rotation of the two swivel frames relative to the horizontal lug 19 is more flexible; the inner middle sleeve 20 inserted in the middle of the cylindrical pin 21 and embedded in the horizontal lug 19 makes the rotation of the horizontal lug 19 more flexible; The upper part of the shaft 27 is embedded in the outer upper sleeve 28 in the swivel frame support 30, so that the rotation of the two swivel frames relative to the convex shaft 27 is more flexible; it is sleeved in the middle of the convex shaft 27 and embedded in the left swivel frame 23 Or the outer middle sleeve 29 in the right swivel frame 24 makes the rotation of the two swivel frames more flexible relative to the convex shaft 27. In this example, the left rotating frame 23 and the right rotating frame 24 are distributed at an angle of 90°.

The lateral supports of the present invention are all connected with the surrounding biological shielding layer (ie biological shielding cement wall) through bolts, so as to transmit the weight of the pressure shell and the seismic load to the biological shielding layer.

The invention can not only be used for the pressure boundary part of the modular high-temperature gas-cooled reactor, but also can be used on the support of other large-scale pressure vessels, such as oil refining equipment of petrochemical plants and the like. The use of the invention can ensure the effective support of the equipment, ensure the anti-seismic performance of the equipment, and reduce the manufacturing cost.

Claims (3)

1. The damper-free support system of the modular high-temperature gas-cooled reactor pressure vessel, the modular high-temperature gas-cooled reactor pressure vessel comprises a reactor pressure vessel (1) and a steam generator pressure vessel ( 7), characterized in that: the non-damper support system includes The first main load-bearing support (4) connecting the reactor pressure vessel and the biological shielding layer arranged at the height of the axis of the hot gas conduit is used to prevent the reactor pressure vessel from rotating and axially shifting; The second main load-bearing support (3) connecting the steam generator pressure shell and the biological shielding layer arranged at the height of the hot gas conduit axis is used to prevent the axial displacement of the steam generator pressure shell; The first lateral support (2) connecting the reactor pressure vessel and the biological shielding layer arranged on the upper part of the reactor pressure vessel is used to prevent the reactor pressure vessel from rotating in the circumferential direction; and The second lateral supports (5) connecting the steam generator pressure shell and the biological shielding layer respectively arranged at the upper part and the lower part of the steam generator pressure shell are used to prevent the steam generator pressure shell from rotating in the circumferential direction. 2. The damper-free support system for the pressure shell of a modular high-temperature gas-cooled reactor according to claim 1, wherein the first main load-bearing support and the second main load-bearing support both include 1) the biological shielding layer riser (14) that is fixed on the biological shielding layer (8) by the first fixing bolt (15) and the first fixing nut (16); 2) the biological shielding layer flat plate (13) and the vertical support plate (17) welded on the biological shielding layer vertical plate (14), the vertical support plate (17) supports the biological shielding layer flat plate (13) from the bottom, and with Welded together, the surface of the biological shielding layer plate (13) is provided with a chute; 3) a pressure shell welding flat plate (9) and a vertical tie bar (18) welded on the outer wall of the pressure shell, and the vertical tie bar (18) is welded together with the pressure shell welding flat plate (9); 4) the excessive guide plate (12) that is arranged in the surface chute of the biological shielding layer flat plate (13); 5) the transition slot plate (11) welded on the transition guide plate (12); 6) The upper guide plate (10) welded on the transition groove plate (11), the surface of the upper guide plate (10) is provided with grooves, and the outer lower end of the pressure shell welded plate (9) is supported on the upper guide plate (10) in the groove. 3. The damper-free support system for the pressure vessel of a modular high-temperature gas-cooled reactor according to claim 1, wherein the first lateral support and the second lateral support both include 1) Horizontal lugs (19) with grooved ends welded on the outer wall of the pressure vessel; 2) The left swivel frame (23) and the right swivel frame (24) connected together by the cylindrical pin (21) and the horizontal lug (19), the other of the left swivel frame (23) and the right swivel frame (24) One end also has a through hole respectively, and a convex shaft (27) is arranged in the through hole, and the two rotating frames are respectively connected with the rotating frame support (30) through the convex shaft (27), and the rotating frame support (30) passes through The bolt connection is fixed on the biological shielding layer (8); 3) The inner upper sleeve (22) is sleeved on the upper part of the cylindrical pin (21) and embedded in the left rotating frame (23) and the right rotating frame (24), so that the two rotating frames are opposite to the horizontal lifting lug (19). Rotation is more flexible; 4) The inner middle sleeve (20) which is set in the middle of the cylindrical pin (21) and embedded in the horizontal lug (19) makes the rotation of the horizontal lug (19) more flexible; 5) The outer upper sleeve (28) sleeved on the upper part of the convex shaft (27) and embedded in the rotating frame support (30) makes the rotation of the two rotating frames relative to the convex shaft (27) more flexible; 6) Sleeve in the middle of the convex shaft (27) and embedded in the outer middle sleeve (29) in the left rotating frame (23) or the right rotating frame (24), so that the two rotating frames are opposite to the convex shaft (27) The rotation is more flexible.

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