A long-short switchable core guide column operating tool

Abstract

The application provides a long-short switchable core guide column operating tool, which comprises a detachable head hoisting tool and a load-bearing connecting screw rod rotating tool, the detachable head hoisting tool has a long rod, the long rod is a hollow rod, the lower end of the long rod is sequentially provided with a latch air cylinder and a guide horn cover, and the load-bearing connecting screw rod rotating tool is inserted into the long rod. The application can quickly realize the mutual replacement of the "short guide column" and the "long guide column", and the replacement can be completed during the core water filling process, without the need of additionally arranging the main line time. The guide column body does not need to be disassembled, and the operator only needs to replace the detachable joint of the guide column on the auxiliary bridge above the water pool by using the special tool, so that the short / long switching is realized quickly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of reactor core guide column installation, in particular to a long-short switchable reactor core guide column operation tool. BACKGROUND

[0002] At present, two types of guide columns are configured in the reactor core, which are respectively used for hoisting the reactor pressure vessel without components and under the working condition. The short guide column is 5.5 m long and weighs 390 Kg, which is used for hoisting the top cover, the upper in-core component and the sealing surface protection ring. The long guide column is 9.4 m long and weighs 650 Kg, which is used for hoisting the lower in-core component.

[0003] During the ten-year overhaul of the unit, the lower in-core component needs to be hoisted out after unloading. In the past, a special main window was installed after the top cover was hoisted open, and the short guide column was replaced with the long guide column. Since the two types of guide columns configured in the design stage do not consider the influence of the structure on the site process, and the star-shaped support of the pressure vessel top cover hoist interferes with the long guide column, the short guide column needs to be installed first to hoist the pressure vessel top cover away from the reactor core, then the false top cover is hoisted to the reactor core, and the short guide column is replaced with the long guide column by the cooperation of the site personnel and the hoisting personnel, and finally the false top cover is hoisted out of the reactor core. On this premise, the smooth hoisting of the lower in-core component during the ten-year overhaul can be ensured. SUMMARY

[0004] The purpose of the present application is to provide a long-short switchable reactor core guide column operation tool, which solves the problems of hoisting and long-distance connection and disassembly of the detachable head during the switching of the long-short integrated reactor core guide column.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A long-short switchable reactor core guide column operation tool, comprising a detachable head hoisting tool and a load-bearing connecting screw rod rotating tool, the detachable head hoisting tool has a long rod, the long rod is a hollow rod, the lower end of the long rod is provided with a latch cylinder and a guide horn cover in sequence; the load-bearing connecting screw rod rotating tool is inserted into the long rod.

[0007] As an implementable way, an operating rod is arranged above the detachable head hoisting tool, and the operating rod is perpendicular to the long rod.

[0008] As an implementable way, a conical head lifting lug is arranged above the guide horn cover, the latch cylinder is arranged on the circumferential side of the conical head lifting lug, and the latch of the latch cylinder extends into the holes on both sides of the conical head lifting lug.

[0009] As an implementable way, the number of the latch cylinders is 2, and they are arranged at 180°.

[0010] As an implementable mode, the lower part of the plug-in cylinder is provided with a supporting plate.

[0011] As an implementable mode, the upper part of the load-bearing connecting screw rod rotating tool is provided with a rotating rod.

[0012] As an implementable mode, the load-bearing connecting screw rod rotating tool is in T-shaped structure as a whole.

[0013] As an implementable mode, the lower part of the load-bearing connecting screw rod rotating tool is provided with an external four-square operation head.

[0014] Compared with the prior art, the long / short switchable reactor core guide column operation tool has the following beneficial effects:

[0015] The long / short switchable reactor core guide column operation tool can quickly realize the mutual replacement of the short guide column and the long guide column, and the replacement can be completed during the reactor core water filling process, without the need of additionally arranging the main line time. The guide column main body does not need to be disassembled, and the operator only needs to replace the detachable joint of the guide column on the auxiliary bridge above the water pool by using a special tool, so that the quick short / long switching is realized.

[0016] The long / short switchable reactor core guide column operation tool is a remote manual operation tool, which has the advantages of simple structure, safe operation, reliability, convenience, and can quickly perform the integrated long / short switching of the reactor core guide column. Since the operation is performed remotely above the water pool, the process of hoisting the false top cover and replacing the guide column is omitted, the switching process is synchronized with the reactor core water filling, the main line window does not need to be specially arranged, and the short guide column is switched into the long guide column only for 0.5h, which has significant significance for optimizing the main line progress and improving the work safety and quality. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 The short guide column structure schematic diagram provided by the embodiments of the present application;

[0019] Figure 2 The long guide column structure schematic diagram provided by the embodiments of the present application;

[0020] Figure 3 The long / short switchable reactor core guide column operation tool installation schematic diagram provided by the embodiments of the present application;

[0021] Figure 4A cross-sectional view of the long-short switchable core guide column operation tool provided by the embodiment of the present application;

[0022] Figure 5 A structural schematic diagram of the detachable head hoisting tool provided by the embodiment of the present application;

[0023] Figure 6 A structural schematic diagram of the load-bearing connecting screw rotation tool provided by the embodiment of the present application.

[0024] Legend of reference signs:

[0025] 1, lower section of guide column; 2, detachable head of short guide column; 3, detachable head of long guide column; 4, detachable head hoisting tool; 5, load-bearing connecting screw rotation tool;

[0026] 41, guide horn cover; 42, latch cylinder; 43, long rod; 44, operating rod; 45, rotating rod; 46, outer four-square operating head. DETAILED DESCRIPTION

[0027] The following is further described in detail through specific embodiments.

[0028] As shown in the drawings, Figures 1 to 6 the present application provides a long-short switchable core guide column operation tool, which comprises a detachable head hoisting tool 4 and a load-bearing connecting screw rotation tool 5. The detachable head hoisting tool 4 has a long rod 43, which is a hollow rod, and the lower end of the long rod 43 is sequentially provided with a latch cylinder 42 and a guide horn cover 41. The load-bearing connecting screw rotation tool 5 is inserted into the long rod 43.

[0029] Preferably, the upper portion of the detachable head hoisting tool 4 is provided with an operating rod 44, which is perpendicular to the long rod 43. The detachable head hoisting tool 4 as a whole is T-shaped.

[0030] Preferably, the guide horn cover 41 is provided with a conical head lifting lug, the latch cylinder 42 is arranged on the circumferential side of the conical head lifting lug, and the latches of the latch cylinder 42 extend into the holes on both sides of the conical head lifting lug. The number of latch cylinders 42 is 2, which are arranged in a central symmetry. The lower portion of the latch cylinder 42 is provided with a supporting plate to support the latch cylinder 42, thereby enhancing the strength and practicability of the detachable head hoisting tool 4.

[0031] As shown in the drawings, Figure 6 the upper portion of the load-bearing connecting screw rotation tool 5 is provided with a rotating rod 45, which is T-shaped as a whole. The lower portion of the load-bearing connecting screw rotation tool 5 is provided with an outer four-square operating head 46.

[0032] The detachable head of the short guide column 2 and the detachable head of the long guide column 3 have the same internal structure, only with a difference in length.

[0033] When the short guide rod / long guide rod is switched, the short guide column can be removed by disassembling the detachable head 2. First, the guide horn cover 41 of the detachable head lifting tool 4 is placed below the short guide column detachable head 2, then the personnel manually rotates the operating rod 44 to make the guide slot inside the guide horn cover 41 tightly fit with the conical head lifting lug of the detachable head lifting tool 4, after the gas pipe of the connecting pin gas cylinder 42 is connected and ventilated, the pin in the pin gas cylinder 42 is extended to the hole on both sides of the conical head lifting lug of the detachable head lifting tool 4, and the fixed connection between the detachable head lifting tool 4 and the short guide column is determined. The load connecting screw rotating tool 5 is inserted into the hollow long rod 43 of the detachable head lifting tool 4, the outer four square operating head 46 is inserted into the load connecting screw above the internal hexagonal hole in the short guide column detachable head 2, the rotating rod 45 is rotated to make the load connecting screw inside the detachable head 2 rotate upwards into the screw hole of the lower section (1) of the guide column, after confirming that the short guide column detachable head 2 is disconnected from the guide column lower section 1, the load connecting screw rotating tool 5 is pulled out, the detachable head lifting tool 4 is lifted out of the short guide column detachable head 2 to the designated storage position by using the crane, the pin in the pin gas cylinder 42 is retracted into the cylinder by operating the pin gas cylinder 42, and it is confirmed that the connection between the detachable head lifting tool 4 and the short guide column detachable head 2 has been disconnected. Similarly, the long guide column detachable head 3 is removed in the same way as described above.

[0034] The process of replacing and installing the long guide column detachable head 3 is as follows: first, the guide horn cover 41 of the detachable head lifting tool 4 is placed below the long guide column detachable head 3, then the personnel manually rotates the operating rod 44 to make the guide slot inside the guide horn cover 41 tightly fit with the conical head lifting lug of the detachable head lifting tool 4, after the gas pipe of the connecting pin gas cylinder 42 is connected and ventilated, the pin in the pin gas cylinder 42 is extended to the hole on both sides of the conical head lifting lug of the detachable head lifting tool 4, and the fixed connection between the detachable head lifting tool 4 and the short guide column is achieved. The detachable head lifting tool 4 is lifted out of the long guide column detachable head 4 onto the guide column lower section 1 by using the crane, the long guide column detachable head 3 is adjusted so that the boss below the long guide column detachable head 3 is installed in place in the recess above the guide column lower section 1. The load connecting screw rotating tool 5 is inserted into the hollow long rod 43 of the detachable head lifting tool 4, the outer four square operating head 46 is inserted into the load connecting screw above the internal hexagonal hole in the long guide column detachable head 6, the rotating rod 45 is rotated to make the load connecting screw inside the detachable head 3 rotate downwards into the screw hole of the guide column lower section 1. After confirming that the long guide column detachable head 3 is threadedly connected to the guide column lower section 1 in place, the load connecting screw rotating tool 5 is pulled out. The pin in the pin gas cylinder 42 of the detachable head lifting tool 4 is retracted into the cylinder by operating the pin gas cylinder 42, and it is confirmed that the connection between the detachable head lifting tool 4 and the short guide column detachable head 2 has been disconnected. The detachable head lifting tool 4 is lifted out by using the crane, and the long guide column installation is completed. The installation of the short guide column detachable head 2 is the same as described above.

[0035] Therefore, the application can quickly realize the "long-short switching" of the guide column, improve the safety and reliability of operation, and also improve the operation efficiency and reduce the radiation dose.

[0036] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A core guide column operating tool with switchable length, characterized in that: The invention comprises a detachable head hoisting tool (4) and a load-bearing connecting screw rotating tool (5), wherein the detachable head hoisting tool (4) has a long rod (43), the long rod (43) is a hollow rod, the lower end of the long rod (43) is provided with a latch cylinder (42) and a guide horn cover (41) in sequence, the upper part of the guide horn cover (41) is provided with a cone head lifting ear, the latch cylinder (42) is provided on the peripheral side of the cone head lifting ear, the latch of the latch cylinder (42) extends into the holes on both sides of the cone head lifting ear, and the latch cylinder (42) is provided with a plurality of latch cylinders (43) and a plurality of guide horn covers (41). The number of the bolt cylinders (42) is 2 and they are arranged at 180 degrees. A support plate is provided below the latch cylinder (42). An operating rod (44) is provided above the detachable head hoisting tool (4), and the operating rod (44) is perpendicular to the long rod (43). The load-bearing connection screw rotating tool (5) is inserted into the long rod (43). The load-bearing connection screw rotating tool (5) is a T-shaped structure as a whole. A rotating rod (45) is provided above the load-bearing connection screw rotating tool (5), and an outer square operating head (46) is provided below.

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