阅读说明：本技术 法兰连接结构 (Flange connection structure ) 是由 周寅鹏 郭志家 衣大勇 彭朝晖 范月容 姚成志 石辰蕾 柯国土 刘兴民 张金山 于 2019-10-29 设计创作，主要内容包括：本发明公开了一种法兰连接结构,所述法兰连接结构用于连接反应堆中的吊篮与底座,所述法兰连接结构包括固定在所述吊篮上的上法兰以及固定在所述底座上的下法兰,所述法兰连接结构还包括：设置在所述上法兰与所述下法兰之间的纵向限位件,所述纵向限位件对所述上法兰以及所述下法兰进行纵向限位；设置在所述上法兰与所述下法兰之间的横向限位件,所述横向限位件对所述上法兰以及所述下法兰进行横向限位。通过使用上述法兰连接结构,底座不仅对吊篮进行有效支撑,而且能够承受温度变化产生的热应力,保证底座不会发生纵向位移和横向位移,提高了底座对吊篮支撑的可靠性。(The invention discloses a flange connecting structure, which is used for connecting a hanging basket and a base in a reactor, and comprises an upper flange fixed on the hanging basket and a lower flange fixed on the base, and the flange connecting structure also comprises: the longitudinal limiting piece is arranged between the upper flange and the lower flange and used for longitudinally limiting the upper flange and the lower flange; the transverse limiting part is arranged between the upper flange and the lower flange and used for transversely limiting the upper flange and the lower flange. Through using above-mentioned flange joint structure, the base not only effectively supports the hanging flower basket, can bear the thermal stress that the temperature variation produced moreover, guarantees that the base can not take place longitudinal displacement and lateral displacement, has improved the reliability that the base supported the hanging flower basket.)

1. The utility model provides a flange joint structure, flange joint structure is arranged in connecting hanging flower basket and the base in the reactor, flange joint structure is including fixing last flange on the hanging flower basket and fixing lower flange on the base, its characterized in that, flange joint structure still includes:

the longitudinal limiting piece is arranged between the upper flange and the lower flange and longitudinally limits the upper flange and the lower flange;

the transverse limiting part is arranged between the upper flange and the lower flange, and the transverse limiting part is used for transversely limiting the upper flange and the lower flange.

2. The flange connection structure according to claim 1, wherein:

the flange connection structure is provided with a plurality of longitudinal limiting parts, and the plurality of longitudinal limiting parts are uniformly distributed along the circumferential direction of the upper flange and the lower flange.

3. The flange connection structure according to claim 2, wherein:

the flange connection structure is provided with a plurality of horizontal locating parts, if in a horizontal locating part edge go up the flange with the circumference evenly distributed of flange down.

4. The flange connection structure according to claim 3, wherein:

the longitudinal limiting pieces and the transverse limiting pieces are distributed at intervals along the circumferential direction of the upper flange and the lower flange.

5. The flange connection structure according to any one of claims 1 to 4, wherein:

the longitudinal stopper includes:

the first bolt hole is formed in the upper flange;

the second bolt hole is formed in the lower flange; and

and the connecting bolt penetrates through the first bolt hole and the second bolt hole to longitudinally limit the upper flange and the lower flange.

6. The flange connection structure according to any one of claims 1 to 4, wherein:

the lateral stop comprises:

the connecting key is used for transversely fixing the upper flange and the lower flange.

7. The flange connection structure according to claim 6, wherein:

the spacing groove includes:

the upper groove is formed in the upper flange; and

and the lower groove is formed in the lower flange.

8. The flange connection structure according to claim 1, wherein:

and the base is also fixedly provided with a reinforcing rib.

9. The flange connection structure according to claim 8, wherein:

the base is provided with circulation holes, and the circulation holes are formed among the reinforcing ribs.

Technical Field

The invention relates to equipment in a reactor, in particular to a flange connecting structure.

Background art:

in a deep pool type low temperature heat supply reactor, a reactor core, a control rod driving mechanism, a reactor internals, a base and other components form the components in the pool. The base is a part for supporting the internals, and is usually connected with a lower hanging basket in the internals, so that the support of the base on the internals is realized.

In deep water pond formula low temperature heat supply heap, the base needs to bear the gravity of piling internals and other relevant parts, and when reloading, needs to demolish the hanging flower basket on the internals, and the internals need bear the vertical tensile stress of demolising in the operation, simultaneously, considers accident operating modes such as earthquake operating mode, and the base need strictly guarantee that the internals does not take place fore-and-aft relative displacement.

In addition, when the heat supply reactor works, the temperature in the heat supply reactor can change, and the base can be subjected to transverse thermal stress due to the change of the temperature. The thermal stress is a shear stress, the direction of the thermal stress is perpendicular to the surface of the base, and the thermal stress can cause the base to generate lateral relative displacement so as to reduce the reliability of the base for supporting the in-stack components.

There is therefore a need in the art for a base and basket connection structure that securely supports internals and prevents relative longitudinal and lateral displacement of the internals.

Disclosure of Invention

An object of an embodiment of the present invention is to provide a flange connection structure for connecting a basket and a base in a reactor, the flange connection structure including an upper flange fixed to the basket and a lower flange fixed to the base, the flange connection structure further including: the longitudinal limiting piece is arranged between the upper flange and the lower flange and used for longitudinally limiting the upper flange and the lower flange; the transverse limiting part is arranged between the upper flange and the lower flange and used for transversely limiting the upper flange and the lower flange.

According to the embodiment of the invention, the flange connecting structure is uniformly provided with a plurality of longitudinal limiting pieces along the circumferential direction of the upper flange and the lower flange.

According to the embodiment of the invention, the flange connection structure is uniformly provided with a plurality of transverse limiting pieces along the circumferential direction of the upper flange and the lower flange.

According to an embodiment of the present invention, the longitudinal limiting pieces and the transverse limiting pieces are distributed at intervals along the circumferential direction of the upper flange and the lower flange.

According to an embodiment of the invention, the longitudinal stop comprises: a first bolt hole formed in the upper flange; the lower flange is provided with a second bolt hole and a connecting bolt which penetrates through the first bolt hole and the second bolt hole to longitudinally limit the upper flange and the lower flange.

According to an embodiment of the invention, the lateral limit stop comprises: the connecting key is used for transversely fixing the upper flange and the lower flange.

According to an embodiment of the present invention, the stopper groove includes: an upper groove formed in the upper flange and a lower groove formed in the lower flange.

According to the embodiment of the invention, the base is also fixedly provided with a reinforcing rib.

According to an embodiment of the invention, the base is provided with flow holes which are arranged between the reinforcing ribs.

By adopting the technical scheme, the invention mainly has the following technical effects:

1. the flange connection structure provided by the invention adopts a connection mode that the longitudinal limiting piece and the transverse limiting piece are shared, the connection structure is simple and reliable, the base can reliably support a hanging basket, and the thermal stress generated due to temperature change can be effectively responded;

2. the longitudinal limiting piece in the flange connection structure can prevent the hanging basket from longitudinally and relatively displacing with the base, so that the reliability of connection between the base and the hanging basket is improved;

3. according to the flange connection structure, the transverse limiting pieces are uniformly distributed along the circumferential directions of the upper flange and the lower flange, so that transverse thermal stress generated by temperature change can be uniformly distributed, deformation caused by nonuniform thermal stress distribution is prevented, and the base is guaranteed to safely and reliably support the hanging basket.

Drawings

Fig. 1 is a cross-sectional view of a flange connection according to the present invention, taken along a longitudinal stopper;

FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 3 is a cross-sectional view of a flange connection structure according to the present invention when connection bolts are not installed;

FIG. 4 is an enlarged view of portion B of FIG. 3;

fig. 5 is a sectional view of the flange connection structure according to the present invention, taken along a lateral stopper;

fig. 6 is a sectional view of the flange connection structure when the connection key is not installed according to the present invention;

fig. 7 is an enlarged view of a portion C in fig. 6.

In the figure: 1. a hanging basket; 11. an upper flange; 2. a base; 21. a lower flange; 22. reinforcing ribs; 23. a flow-through hole; 3. a longitudinal limit piece; 31. a first bolt hole; 32. a second bolt hole; 33. a connecting bolt; 4. a lateral limit piece; 41. a limiting groove; 411. an upper groove; 412. a lower groove; 42. a connecting key.

Detailed Description

The following description of the embodiments of the present invention is provided in connection with the accompanying drawings.

Referring to fig. 1 and 2, the present invention provides a flange connection structure for connecting a basket 1 and a base 2 in a reactor, the flange connection structure including an upper flange 11 fixed on the basket 1 and a lower flange 21 fixed on the base 2, the flange connection structure according to the present invention further including a longitudinal position limiting member 3 disposed between the upper flange 11 and the lower flange 21 and a lateral position limiting member 4 disposed between the upper flange 11 and the lower flange 21, the longitudinal position limiting member 3 longitudinally limiting the upper flange 11 and the lower flange 21, and the lateral position limiting member 4 laterally limiting the upper flange 11 and the lower flange 21. Normally, the upper flange 11 is formed integrally with the basket 1 and the lower flange 21 is formed integrally with the base 2, but of course, the upper flange 11 and the basket 1 may be formed separately and then welded together, as may the lower flange 21 and the base 2.

The structures of the longitudinal limiting member 3 and the transverse limiting member 4 are not limited, and the longitudinal limiting member 3 and the transverse limiting member 4 may be screw connectors or connectors of other structures. Preferably, referring to fig. 3 and 4, the longitudinal stopper 3 in the present embodiment includes a first bolt hole 31 opened on the upper flange 11, a second bolt hole 32 opened on the lower flange 21, and a connecting bolt 33 (see fig. 1) passing through the first bolt hole 31 and the second bolt hole 32 to longitudinally stopper the upper flange 11 and the lower flange 21. The connecting bolt 33 passes through the upper flange 11 and the lower flange 21 to fixedly connect the upper flange 11 and the lower flange 21 together, so that the base 2 can well bear the gravity of the hanging basket 1, and meanwhile, the longitudinal relative displacement between the base and the hanging basket due to longitudinal tensile stress is avoided when the reactor is reloaded. The longitudinal relative displacement between the gondola 1 and the base 2 can be effectively limited by the longitudinal stop 3 so that both can be reliably positioned relative to each other in the longitudinal direction.

Referring to fig. 5 and 6, in order to cope with thermal stress generated by temperature change, the lateral restraint member 4 in the present embodiment includes a restraint groove 41 and a connection key 42 embedded in the restraint groove 41, the connection key 42 fixes the upper flange 11 and the lower flange 21 laterally, and the restraint groove 41 includes an upper groove 411 (see fig. 7) opened in the upper flange 11 and a lower groove 412 (see fig. 7) opened in the lower flange 21. The connecting key 42 is matched with the upper groove 411 and the lower groove 412 to bear enough shear stress, when the hanging basket 1 is installed on the base 2, the connecting key 42 is embedded into the limiting groove 41 formed by the upper groove 411 and the lower groove 412, the connecting key 42 has a transverse limiting effect on the hanging basket 1 and the base 2, and namely the connecting key 42 limits transverse relative displacement between the hanging basket 1 and the base 2. When the temperature in the heat supply pile changes and generates thermal stress, the transverse limiting piece 4 can bear the thermal stress, so that the base 2 and the hanging basket 1 are prevented from generating transverse relative displacement, and the reliability of connection of the base 2 and the hanging basket 1 is ensured. In addition, since the height of the entire reactor internals is high, the lateral stoppers 4 can also withstand the lateral shear forces generated during rocking when rocking occurs.

Referring to fig. 1 and 2, in order to enable the base 2 to uniformly bear the gravity of the basket 1 and the thermal stress generated by the temperature change, and not to cause the deformation of the base 2 due to the overlarge stress on a certain point in the base 2, the invention uniformly arranges a plurality of longitudinal limiting members 3 and a plurality of transverse limiting members 4 along the circumferential direction of the upper flange 11 and the lower flange 21. The flange connection structure is evenly provided with a plurality of longitudinal limiting parts 3 and a plurality of transverse limiting parts 4 along the circumferential direction of the upper flange 11 and the lower flange 21, and the longitudinal limiting parts 3 and the transverse limiting parts 4 are distributed at intervals along the circumferential direction of the upper flange 11 and the lower flange 21. Put another way, when viewed from the center of the basket 1 or the base 2 along the radial direction thereof, the longitudinal limiting members 3 and the transverse limiting members 4 are spaced apart, for example, on the entire circumference of the basket 1 or the base 2, a position at 0 degree along the radius direction is a first longitudinal limiting member, a position at 15 degree is a first transverse limiting member, a position at 30 degree is a second longitudinal limiting member, a position at 45 degree is a second transverse limiting member, and so on (as shown in fig. 2). Of course, the two are only described as being separated by 15 degrees, and the separation angle between the two can be set and arranged reasonably according to actual requirements. Set up vertical locating part 3 along the circumference of upper flange 11 and lower flange 21 evenly and can let base 2 evenly bear the gravity of hanging flower basket 1, guarantee that base 2 can not lead to base 2 to warp because of a little atress is too big to the life of extension base 2. Set up horizontal locating part 4 along the circumference of upper flange 11 and lower flange 21 uniformly and can let base 2 bear the thermal stress who produces because of the temperature variation uniformly, guarantee that base 2 can not warp because of the too big base 2 that leads to of a little atress, when the temperature risees, base 2 is to even inflation on every side, the horizontal locating part 4 of a plurality of equipartition carries out horizontal spacing to base 2 jointly, base 2 can not warp because of a certain little atress is too big, thereby extension base 2's life. Meanwhile, through the pretightening force of the longitudinal limiting piece 3, the sealing effect (allowing micro leakage) between the hanging basket 1 and the base 2 can be ensured.

Referring to fig. 1, in order to reinforce the reliability of the base 2 for supporting the basket 1, a reinforcing rib 22 is further fixedly provided on the base 2, and the shape and the installation manner of the reinforcing rib 22 are not limited, for example, the reinforcing rib 22 may be a triangular steel plate and fixed on the base 2 by welding. Of course, the reinforcing ribs 22 may be integrally formed with the base 2.

By adopting the flange connection structure, the connection between the longitudinal limiting piece 3 and the transverse limiting piece 4 fully meets the mechanical requirements, the connection structure is simple and reliable, the base 2 can effectively support the hanging basket 1 through the matching work of the longitudinal limiting piece 3 and the transverse limiting piece 4, and meanwhile, the heat stress generated by temperature change in a heat supply pile can be coped with, and the hanging basket 1 is safely and reliably supported.

Referring to fig. 1, in the deep water pond type low temperature heat supply reactor, liquid water exists at the bottom of the pond, in order to prevent the pressure of the water from deforming the base 2, the base 2 is provided with circulation holes 23 arranged between the reinforcing ribs 22, the water flows through the circulation holes 23, the pressure of the water to the two sides of the base 2 is the same, and the deformation of the base 2 caused by the water pressure on only one side of the base 2 is prevented, so that the reliability of the base 2 for supporting the hanging basket 1 is improved.

When an operator installs the hanging basket 1, the connecting key 42 is installed into the lower groove 412, the upper groove 411 of the hanging basket 1 is aligned to the position of the connecting key 42, the connecting key 42 is embedded into the upper groove 411, transverse limiting of the hanging basket 1 is completed, finally the connecting bolt 33 is installed, and the hanging basket 1 is longitudinally limited by the connecting bolt 33.

The flange connection structure provided by the invention can ensure that the base 2 longitudinally supports the hanging basket 1, prevent the hanging basket and the base from longitudinally relative displacement, and also ensure that the base 2 can effectively deal with thermal stress without deformation when the temperature changes, and the reliability of the base 2 for supporting the hanging basket 1 is improved by the mutual cooperation of the longitudinal limiting piece 3 and the transverse limiting piece 4. The vertical limiting parts 3 and the horizontal limiting parts 4 are uniformly arranged along the circumferential direction of the upper flange 11 and the lower flange 21 at intervals, so that the gravity of the hanging basket 1 can be effectively shared by all the vertical limiting parts 3, the thermal stress generated by temperature change is effectively shared by all the horizontal limiting parts 4, the reliable support of the base 2 is ensured, the service life of the base 2 is prolonged, and the reliability of the base 2 for supporting the hanging basket 1 is further improved.

The above embodiments are only for illustrating the invention and are not to be construed as limiting the invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, therefore, all equivalent technical solutions also belong to the scope of the invention, and the scope of the invention is defined by the claims.