JP6178232B2 - Condenser and its seismic reinforcement method - Google Patents

Description

  Embodiments of the present invention relate to a condenser installed in, for example, a thermal power or nuclear power plant and a method for seismic reinforcement thereof.

  Prior to the Great East Japan Earthquake, thermal power or nuclear power plants have been demanded to increase seismic strength, and condensers are also designed based on that demand. However, after the Great East Japan Earthquake, the demand for increasing the seismic strength of power plants has become more severe, and some current condensers have insufficient seismic strength.

  In addition, as a condenser having improved seismic strength, for example, there is a technique described in Patent Document 1. This condenser is obtained by connecting a condenser lower body and a condenser upper body via an expansion joint.

JP 2000-310494 A

  By the way, at the time of an earthquake, a large acceleration is applied to the condenser in the two plane directions in the plane of the length direction and the width direction orthogonal to the length direction due to a large roll. This acceleration can cause the condenser to move laterally and fall off the condenser foundation.

  Usually, the condenser is installed in the building. Therefore, it is necessary to improve the condenser to have a seismic strength that will not be damaged even by acceleration caused by shaking during a large earthquake.

  An object of the embodiment of the present invention is to provide a condenser and a seismic reinforcement method for further improving the seismic strength.

The condenser of the present embodiment includes a heat transfer tube, a lower main body that is installed on an upper portion of the foundation and covers a horizontal outer periphery of the heat transfer tube, an upper main body that is connected to an upper portion of the lower main body, and the lower main body. An inner seismic member that is provided on the inner side of the lower end part and restricts movement of the lower body in at least one of one direction in the horizontal plane of the lower body and another direction different from the one direction, and is disposed outside the lower body An outer seismic member that can be installed after installation of the lower body and regulates the movement of the lower body in at least one of the one direction on the horizontal plane of the lower body and the other direction different from the one direction. It is characterized by that.

The seismic reinforcement method of the condenser of the present embodiment includes a heat transfer tube, a lower main body that is installed on an upper portion of the foundation and covers a horizontal outer periphery of the heat transfer tube, an upper main body that is connected to an upper portion of the lower main body , An inner seismic member that is provided on the inner side of the lower end of the lower body and regulates the movement of the lower body in at least one of one direction in the horizontal plane of the lower body and another direction different from the one direction . A condenser anti-seismic reinforcement method for reinforcing the anti-seismic strength of a condenser, the condenser installation step of installing the heat transfer pipe, the lower body, the upper body, and the inner seismic member, and the condensate after the vessel installation process, the outside of the lower body, placing the outer seismic member for restricting the movement of said one direction and said lower body in the other direction of the at least one different from the one direction in the horizontal plane of the lower body outside resistance And having a member installation step.

  According to this embodiment, the seismic strength can be further improved.

It is an elevation view which shows 1st Embodiment of the condenser which concerns on this invention. It is a side view of FIG. It is a schematic sectional drawing by the III-III line of FIG. It is a perspective view which shows the existing earthquake-resistant member of FIG. It is an elevation view which shows the existing and new earthquake-resistant member of FIG. FIG. 6 is a side view of FIG. 5. It is a top view which shows the reinforcement board and fall prevention board of FIG. It is an elevational view showing a second embodiment of a condenser according to the present invention. It is a side view of FIG. It is a schematic sectional drawing by the XX line of FIG. It is a schematic sectional drawing which shows 3rd Embodiment of the condenser which concerns on this invention.

  Hereinafter, an embodiment of a condenser and a seismic reinforcement method according to the present invention will be described with reference to the drawings.

(First embodiment)
[Constitution]
FIG. 1 is an elevation view showing a first embodiment of a condenser according to the present invention. FIG. 2 is a side view of FIG. 3 is a schematic sectional view taken along line III-III in FIG.

  As shown in FIGS. 1 to 3, the condenser main body 1 includes a lower main body 3 and an upper main body 7, and four corners are supported by four foundations 2. The lower main body 3 has a rectangular cross section. The lower main body 3 is installed so as to be placed above the foundation 2, and a heat transfer tube 4 is installed therein. The lower main body 3 has a lower main body bottom plate 3a connected to the foundation 2, and a pair of lower main body side plates 3b and a lower main body end plate 3c fixed above the lower main body bottom plate 3a and facing each other. The upper ends of the pair of lower body side plates 3b and the lower body end plate 3c are joined to the upper body 7.

  A tube plate 5 is attached to the pair of lower main body end plates 3c. A water chamber 6 is installed in these tube plates 5. Cooling water flows into one water chamber 6, and this cooling water flows out from the other water chamber 6 through one tube plate 5, the heat transfer tube 4, and the other tube plate 5. At this time, turbine steam flows into the condenser main body 1, and this steam is heat-exchanged with the cooling water that has flowed into the heat transfer pipe 4 to become condensed water.

  The upper body 7 is placed on the lower body 3 and is rigidly joined by welding. Thereby, the load of the upper body 7 is supported by the lower body 3. A connection piece 8 is rigidly joined by welding above the upper body 7. This connection piece 8 is connected to a turbine casing (not shown).

  Next, the existing and new earthquake-resistant members will be described.

  FIG. 4 is a perspective view showing the existing and new earthquake-resistant members of FIG. FIG. 5 is an elevation view showing the existing and new seismic members of FIG. FIG. 6 is a side view of FIG. FIG. 7 is a plan view showing the reinforcing plate and the fall prevention plate of FIG.

In this embodiment, as shown in FIGS. 1 and 3, the existing seismic member (inner seismic member) 10 and the newly installed seismic member (outer seismic member) 20 are substantially in the length direction (one direction) in the horizontal plane of the lower body 3. It is installed in the center. As shown in FIGS. 4 to 7, the existing seismic member 10 and the new seismic member 20 are divided into a base side and a lower main body 3 side.

  The existing seismic member 10 on the pedestal side includes a pedestal 11 installed below the lower main body bottom plate 3 a of the lower main body 3, a pedestal fixing plate 12 fixed on the pedestal 11, and the pedestal fixing plate 12. And an upstanding wall 13 arranged in parallel. A keyway 14 is formed between the upright walls 13.

  The existing seismic member 10 on the lower main body 3 side is fixed to the inner surface of the lower main body side plate 3b by welding, and to the key 16 on both sides of the key 16 and the inner surface of the lower main body side plate 3b. 16 and a reinforcing plate 17 for increasing the fixing strength. The lower end of the key 16 is slidably inserted into the key groove 14 through an insertion hole formed in the lower main body bottom plate 3a.

  Therefore, the key 16 can move in the direction in which the key groove 14 is formed. Further, the standing wall 13 restricts the movement of the key 16 in the direction orthogonal to the direction in which the key groove 14 is formed. Thereby, the lower main body 3 can move in the arrow A direction with respect to the base 11 as shown in FIG. Further, as shown in FIG. 3, the lower main body 3 is restricted from moving in the arrow B direction perpendicular to the arrow A direction of the lower main body 3.

The newly installed seismic member 20 is divided into a base side and a lower main body 3 side in the same manner as the existing seismic member 10. Specifically, the newly installed earthquake-resistant member 20 includes a pedestal (outer pedestal) 21 installed below the lower main body bottom plate 3a of the lower main body 3, a pedestal fixing plate 22 fixed on the pedestal 21, and the pedestal. Equipped with standing walls (outer standing resistant walls) 23 arranged on the fixed plate 22 in parallel with each other. A keyway (outer keyway) 24 is formed between the standing walls 23.

The newly installed seismic member 20 on the lower body 3 side includes a side plate fixing plate 25 joined to the lower body side plate 3b by welding, and a block-like key (outer side) fixed horizontally on the outside of the side plate fixing plate 25. 26 ) , a reinforcing plate (outer reinforcing plate) 27 that is fixed to both sides of the key 26 and the side plate fixing plate 25 to increase the fixing strength of the key 26, and is fixed near the lower end of the key 26. A fall prevention plate 28 for preventing the fall is provided. The lower end of the key 26 is slidably inserted into the key groove 24.

  Therefore, the key 26 can move in the direction formed in the key groove 24. Further, the standing wall 23 restricts the movement of the key 26 in the direction orthogonal to the direction in which the key groove 24 is formed. Thereby, the lower main body 3 can move in the direction of arrow A with respect to the base 21 as shown in FIG. Further, as shown in FIG. 3, the lower main body 3 is restricted from moving in the arrow B direction perpendicular to the arrow A direction of the lower main body 3.

  Further, in FIG. 3, a plurality of reinforcing ribs 19 and 29 are fixed to the standing walls 13 and 23 of the existing seismic member 10 and the new seismic member 20. These reinforcing ribs 19 and 29 are omitted in FIGS. 4 to 7 because the drawings are complicated.

[Operation]
Next, the operation of this embodiment will be described.

  In the present embodiment, it is assumed that the existing seismic member 10 is installed in the condenser main body 1 in advance. First, the base 21 of the newly installed earthquake-resistant member 20 is installed on the lower main body bottom plate 3 a side of the existing earthquake-resistant member 10. Specifically, the base 21 is installed adjacent to the base 11 so as to be the same height as the base 11 of the existing earthquake-resistant member 10. In this case, the base fixing plate 22 and the standing wall 23 may be attached to the base 21 in advance before the base 21 is installed.

  Next, the side plate fixing plate 25 to which the key 26, the reinforcing plate 27, and the fall prevention plate 28 are fixed is fixed to the lower end portion of the lower main body side plate 3b by welding. When the lower main body side plate 3b is fixed in this way, the key 26 is positioned so as to be slidably inserted into the key groove 24.

  Assuming that the acceleration due to the shaking acts on the condenser main body 1 in the direction of arrow B during the earthquake, the moving direction of the keys 16 and 26 in the existing seismic member 10 and the new seismic member 20 is arrow A. Therefore, the acceleration acting on the lower main body 3 of the condenser main body 1 in the direction of the arrow B is received by the standing walls 13 and 23 in the existing seismic member 10 and the new seismic member 20. This reaction force is transmitted to the key 16 in the existing seismic member 10 and dispersed in the lower main body 3 via the reinforcing plate 17. Similarly, in the newly installed seismic member 20, it is transmitted to the key 26 and dispersed in the lower main body 3 through the reinforcing plate 27 and the fall prevention plate 28. Therefore, it becomes possible to make it a strong earthquake-resistant member.

  That is, when shaking occurs in the condenser main body 1 due to an earthquake, shaking acceleration is applied to the existing seismic member 10 and the new seismic member 20. This acceleration can be received by the keys 16 and 26. At this time, a large load is applied to the keys 16 and 26 and a tipping moment is generated.

  However, the inner key 16 of the lower body 3 can receive a large load by the lower body bottom plate 3 a and the reinforcing plate 17, and the outer key 26 of the lower body 3 can receive a large load by the reinforcing plate 27 and the fall prevention plate 28. In particular, the fall prevention plate 28 is an important component when receiving a fall moment applied to the key 26.

  Further, since the existing seismic member 10 and the new seismic member 20 are fixed to the lower main body bottom plate 3a and the lower main body side plate 3b, the acceleration acting in the direction of the arrow B is applied to the existing seismic member 10 and the new seismic member. 20 is distributed to the lower main body bottom plate 3a and the lower main body side plate 3b.

[Effect]
As described above, according to the present embodiment, it is possible to move in a direction orthogonal to the acceleration with respect to the acceleration caused by the shake acting on the condenser main body 1 in the direction parallel to the lower main body side plate 3b in the event of an earthquake. By providing the newly installed seismic member 20 that restricts movement in the same direction as the above, the newly installed seismic member 20 can absorb acceleration due to shaking during an earthquake. Thereby, seismic strength can be improved further.

  In addition, according to the present embodiment, the newly installed seismic member 20 is fixed on the two surfaces of the lower main body bottom plate 3a and the lower main body side plate 3b, so that the acceleration caused by the shaking during the earthquake is dispersed throughout the condenser main body 1. Can be absorbed. As a result, it is possible to improve the seismic strength of the condenser main body 1 installed in a narrow turbine building space.

  Furthermore, according to the present embodiment, the mounting strength of the standing wall 23 can be increased by fixing the plurality of reinforcing ribs 29 to the standing wall 23 of the newly installed earthquake-resistant member 20.

(Second Embodiment)
[Constitution]
FIG. 8 is an elevation view showing a second embodiment of the condenser according to the present invention. FIG. 9 is a side view of FIG. FIG. 10 is a schematic sectional view taken along line XX of FIG. In addition, the same code | symbol is attached | subjected and demonstrated to the part which is the same as that of the said 1st Embodiment, or respond | corresponds. The same applies to other embodiments.

  The present embodiment is a modification of the first embodiment. In the present embodiment, as shown in FIGS. 8 to 10, the newly installed earthquake-resistant member 20 is installed at the substantially center in the width direction (other direction) in the horizontal plane of the lower body 3. The newly installed earthquake-resistant member 20 is divided into a pedestal 21 side and a lower main body 3 side as in the first embodiment. In the present embodiment, unlike the first embodiment, the existing seismic member 10 is not installed.

  In the present embodiment, the newly installed earthquake-resistant member 20 is disposed so as to be connected to the lower main body bottom plate 3a and the lower main body end plate 3c. Specifically, the side plate fixing plate 25 to which the key 26, the reinforcing plate 27, and the fall prevention plate 28 are fixed is fixed to the lower end portion of the lower main body end plate 3c by welding.

[Operation]
If the acceleration due to the shaking acts on the condenser main body 1 in the direction of the arrow D during the earthquake, the moving direction of the key 26 in the newly installed earthquake-resistant member 20 is the arrow C. Therefore, the acceleration acting in the direction of arrow D with respect to the lower main body 3 of the condenser main body 1 is received by the standing wall 23 in the newly installed earthquake-resistant member 20. This reaction force is transmitted to the key 26 and dispersed in the lower main body 3 through the reinforcing plate 27 and the fall prevention plate 28. Therefore, it becomes possible to make it a strong earthquake-resistant member.

  Further, since the newly installed seismic member 20 is fixed to the lower main body bottom plate 3a and the lower main body end plate 3c, the acceleration acting in the direction of the arrow D is transmitted via the new seismic member 20 to the lower main body bottom plate 3a and the lower main body. Dispersed in the end plate 3c.

  Other configurations and operations are the same as those in the first embodiment, and thus description thereof is omitted.

[Effect]
As described above, according to the present embodiment, in the same manner as the effect of the first embodiment, with respect to the acceleration due to the swing acting on the condenser main body 1 in a direction parallel to the lower main body end plate 3c, Is movable in the orthogonal direction, and by providing a new seismic member 20 that restricts movement in the same direction as the acceleration, the new seismic member 20 can absorb acceleration due to shaking during an earthquake. Thereby, seismic strength can be improved further.

  In addition, according to the present embodiment, the newly installed seismic member 20 is fixed on the two surfaces of the lower main body bottom plate 3a and the lower main body end plate 3c, so that the acceleration caused by the shaking during the earthquake is dispersed throughout the condenser main body 1. Can be absorbed. As a result, it is possible to improve the seismic strength of the condenser main body 1 installed in a narrow turbine building space.

(Third embodiment)
FIG. 11 is a schematic cross-sectional view showing a third embodiment of the condenser according to the present invention.

  The present embodiment is a modification in which the first embodiment and the second embodiment are combined.

  In the present embodiment, the newly installed earthquake-resistant member 20 is installed in the center of the length direction (one direction) of the lower body 3 and is installed in the center of the width direction (other direction) of the lower body 3. The length direction and the width direction of the lower main body 3 are perpendicular to each other. That is, in the present embodiment, the newly installed seismic member 20 is disposed so as to be fixed to the lower main body bottom plate 3a and the lower main body side plate 3b, and is disposed so as to be fixed to the lower main body bottom plate 3a and the lower main body end plate 3c. .

  Therefore, in the present embodiment, when the acceleration due to the shaking acts in the arrow B direction and the D direction of the condenser main body 1 during the earthquake, the moving direction of the key 26 in the newly installed earthquake-resistant member 20 is indicated by the arrows A and C. is there. Therefore, the standing wall 23 in the newly installed seismic member 20 receives the acceleration acting in the directions of arrows B and D with respect to the lower main body 3 of the condenser main body 1.

  In addition, since the newly installed earthquake-resistant member 20 installed at approximately the center in the length direction of the lower main body 3 is fixed to the lower main body bottom plate 3a and the lower main body side plate 3b, the acceleration acting in the arrow B direction is It is distributed to the lower main body bottom plate 3a and the lower main body side plate 3b via the member 20.

  Similarly, since the newly installed earthquake-resistant member 20 installed substantially at the center in the width direction of the lower main body 3 is fixed to the lower main body bottom plate 3a and the lower main body end plate 3c, the arrow D direction orthogonal to the arrow B direction The acceleration acting on is distributed to the lower main body bottom plate 3a and the lower main body end plate 3c via the newly installed earthquake-resistant member 20.

  Thus, according to this embodiment, since it is the modification which combined the said 1st Embodiment and the said 2nd Embodiment, the seismic strength with respect to the shake of the horizontal direction of the condenser main body 1 can be ensured further. .

(Other embodiments)
Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, changes, and combinations can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  For example, each of the above embodiments has been described for the case where the planar shape is applied to the lower main body 3 formed in a rectangle. However, the present invention is not limited to this, and the present invention can also be applied to a planar shape formed in a square shape. is there.

  Moreover, in the said 3rd Embodiment, about the example in which the newly installed earthquake-resistant member 20 was installed in the direction orthogonal to each other like the length direction (one direction) of the lower main body 3, and the width direction (other direction) of the lower main body 3 Although it demonstrated, not only this but the new earthquake-resistant member 20 should just be a different direction like the direction which mutually cross | intersects in the horizontal surface of the lower main body 3, etc., You may make it install the number 3 or more.

DESCRIPTION OF SYMBOLS 1 ... Condenser main body, 2 ... Foundation, 3 ... Lower main body, 3a ... Lower main body bottom plate, 3b ... Lower main body side plate, 3c ... Lower main body end plate, 4 ... Heat-transfer tube, 5 ... Tube plate, 6 ... Water chamber, DESCRIPTION OF SYMBOLS 7 ... Upper body, 8 ... Connection piece, 10 ... Existing earthquake-resistant member (inner earthquake-resistant member) , 11 ... Base, 12 ... Base fixing plate, 13 ... Standing wall, 14 ... Keyway, 16 ... Key, 17 ... Reinforcement plate , 19 ... reinforcing ribs, 20 ... newly installed earthquake-resistant members (outer earthquake-resistant members) , 21 ... pedestal (outer pedestal) , 22 ... pedestal fixing plate, 23 ... standing wall (outer standing wall) , 24 ... key groove (outer key groove) ), 25 ... side plate fixing plate, 26 ... key (outer key), 27 ... reinforcing plate (outer reinforcement plate), 28 ... fall prevention plate, 29 ... reinforcing rib

Claims (7)

A heat transfer tube,
A lower body installed on the upper part of the foundation and covering the outer periphery in the horizontal direction of the heat transfer tube ;
An upper body connected to an upper portion of the lower body ;
An inner seismic member that is provided inside the lower end of the lower body and restricts movement of the lower body in one direction on the horizontal plane of the lower body and in at least one other direction different from the one direction ;
The outer body is disposed outside the lower body, can be installed after the lower body is installed, and restricts movement of the lower body in at least one of the one direction on the horizontal plane of the lower body and the other direction different from the one direction. An outer seismic member,
Condenser characterized by having.   2. The lower body according to claim 1, wherein a planar shape of the lower body is a rectangle, the one direction in a horizontal plane is a length direction, and the other direction is a width direction orthogonal to the one direction. Condenser. The lower body includes a lower body bottom plate attached to the foundation, a lower body side plate and a lower body end plate fixed to the lower body bottom plate,
The condenser according to claim 1 or 2, wherein the upper body is joined to the lower body side plate and the lower body end plate. The outer seismic member is
An outer pedestal installed on the lower outside of the bottom plate of the lower main body;
An outer upstanding wall forming an outer key groove is fixed to the outer base,
Wherein it is inserted into the lower body side plate and the lower body end plate at least one fixed outer key groove in the said be movable in a direction outwardly key groove is formed, the outer key groove is formed An outer key whose movement in a direction perpendicular to the direction is restricted,
The condenser according to claim 3 , wherein 5. The condensate according to claim 4, wherein the outer seismic member further includes an outer reinforcing plate fixed in a horizontal direction with respect to at least one of the lower main body side plate and the lower main body end plate and the key. vessel. The outer seismic member is further provided with a fall prevention plate for fixing in a horizontal direction with respect to at least one of the lower main body side plate and the lower main body end plate and the outer key, and for preventing the outer key from falling. The condenser according to claim 5. A heat transfer tube,
A lower body installed on the upper part of the foundation and covering the outer periphery in the horizontal direction of the heat transfer tube ;
An upper body connected to an upper portion of the lower body ;
An inner seismic member that is provided inside the lower end of the lower body and restricts movement of the lower body in one direction on the horizontal plane of the lower body and in at least one other direction different from the one direction;
An anti-seismic reinforcement method for a condenser for reinforcing the seismic strength of a condenser comprising:
A condenser installation step of installing the heat transfer pipe, the lower body, the upper body, and the inner seismic member;
After the condenser installation process, the outside of the lower body, the outer seismic member for restricting the movement of the lower body to at least one of the one direction and the other direction the unidirectional different in the horizontal plane of the lower body Installing the outer earthquake-resistant member,
An anti-seismic reinforcement method for a condenser, characterized by comprising:

Images