CN221111894U - Guiding device - Google Patents

Abstract

The utility model belongs to the technical field of steam generator overhaul, and discloses a guiding device. The second mounting piece comprises a first transverse plate and a first vertical plate which are vertically connected, the third mounting piece comprises a second transverse plate and a second vertical plate which are vertically connected, the first mounting piece and the first vertical plate are in sliding connection and are formed with a first accommodating cavity, the first mounting piece and the second vertical plate are in butt joint along the extending direction of the first mounting piece, the first transverse plate and the second transverse plate are in butt joint and are formed with a second accommodating cavity, the first accommodating cavity and the second accommodating cavity are communicated, the two ends of the wedge block are fixedly connected with first connecting pieces, and the first connecting pieces can pull the wedge block to reciprocate in the first accommodating cavity and the second accommodating cavity. Under the pulling of the first connecting piece, the wedge block can move in the first accommodating cavity and the second accommodating cavity, and the wedge block can rotate 90 degrees between the heat transfer tubes, so that the wedge block can be conveniently sent between the heat transfer tubes where the clamping positions of the video probe and the foreign object grabbing tool are located, and the video probe and the foreign object grabbing tool can continue to operate.

Description

Guiding device

Technical Field

The utility model relates to the technical field of steam generator overhaul, in particular to a guiding device.

Background

The steam generator can convert heat generated in the nuclear reactor into steam for driving the steam turbine to generate power, is one of main equipment of a primary loop of the nuclear power plant, is an important pressure-bearing boundary of the primary loop, and plays a role in heat exchange of the primary loop and the secondary loop. The steam generator is internally provided with a plurality of dense heat transfer pipes with extremely small intervals and vertical arrangement, and in the processes of operation, maintenance and the like of the steam generator, some foreign matters can be deposited on the secondary side pipe plate and accumulated in the surface of the secondary side pipe plate and the gaps of the pipe bundles along with the operation of the steam generator, so that the problems of abrasion, thermal efficiency reduction, unstable water level and the like of the heat transfer pipes are caused. Therefore, when the steam generator is shut down and reloaded for overhaul, the foreign matters are checked through the video and then taken out by matching with the foreign matter grabbing tool.

However, when the video probe is used for checking the foreign matters, the video probe is easy to be blocked with the foreign matters grabbing tool, so that the video probe and the foreign matters grabbing tool cannot continue to operate.

Disclosure of utility model

The utility model aims to provide a guiding device to solve the problem that a video probe and a foreign matter grabbing tool between heat transfer tubes of an existing steam generator are jammed.

To achieve the purpose, the utility model adopts the following technical scheme:

The guide device is used for guiding the wedge to move among the heat transfer tubes and comprises a first mounting piece, a second mounting piece and a third mounting piece, the second mounting piece is L-shaped and comprises a first transverse plate and a first vertical plate which are vertically connected, the third mounting piece comprises a second transverse plate and a second vertical plate which are vertically connected, one end face of the first mounting piece and one end face of the first vertical plate are in sliding connection and are provided with a first accommodating cavity, one end of the first mounting piece and one end of the second vertical plate are in butt joint along the extending direction of the first mounting piece, the first transverse plate and the second transverse plate are in butt joint and are provided with a second accommodating cavity, the first accommodating cavity is communicated with the second accommodating cavity, two ends of the wedge are fixedly connected with first connecting pieces, the first connecting pieces can extend out of the first accommodating cavity and the second accommodating cavity, and the first connecting pieces can pull the first wedge to reciprocate in the first accommodating cavity and the second accommodating cavity.

As a preferable embodiment of the guide device, the first connecting member is a wire.

As a preferable technical scheme of the guide device, the first mounting member is provided with a first through hole along an extending direction, the second riser is provided with a second through hole along the extending direction, the second connecting member sequentially penetrates through the first through hole and the second through hole, and the second connecting member can connect the first mounting member with the third mounting member.

As a preferable technical solution of the guiding device, the first through hole and the second through hole are both provided with two.

As a preferable technical solution of the guiding device, the second connecting piece is a wire.

As a preferable mode of the above-mentioned guide device, one of the one end face of the first mount and the one end face of the second mount is provided with a guide rail, the other of the one end face of the first mount and the one end face of the second mount is provided with a guide rail groove, and the guide rail is slidably connected with the guide rail groove.

As a preferable technical scheme of the guide device, a joint of the first transverse plate and the first vertical plate is arc-shaped, and a joint of the first transverse plate and the first vertical plate is abutted with a joint of the second transverse plate and the second vertical plate.

As a preferable technical scheme of the guide device, one end of the first mounting piece is provided with a first connecting block, one end of the first vertical plate, which is far away from the first transverse plate, is provided with a second connecting block, and one end of the second vertical plate, which is far away from the second transverse plate, is provided with a third connecting block.

As a preferred embodiment of the guide device, two first connecting blocks are provided.

As a preferable technical scheme of the guiding device, the guiding device is made of stainless steel materials.

The utility model has the beneficial effects that:

The utility model provides a guiding device which is used for guiding a wedge block to move among heat transfer tubes, and comprises a first mounting piece, a second mounting piece and a third mounting piece, wherein the second mounting piece is L-shaped and comprises a first transverse plate and a first vertical plate which are vertically connected, the third mounting piece comprises a second transverse plate and a second vertical plate which are vertically connected, one end face of the first mounting piece is slidably connected with one end face of the first vertical plate and is provided with a first accommodating cavity, one end of the first mounting piece is abutted with one end of the second vertical plate along the extending direction of the first mounting piece, the first transverse plate is abutted with the second transverse plate and is provided with a second accommodating cavity, the first accommodating cavity is communicated with the second accommodating cavity, two ends of the wedge block are fixedly connected with a first connecting piece, the first connecting piece can extend out of the first accommodating cavity and the second accommodating cavity, and the first connecting piece can pull the wedge block to reciprocate in the first accommodating cavity and the second accommodating cavity. When the video probe and the foreign matter grabbing tool are jammed between the heat transfer pipes, one hand hole of the central pipe gallery of the steam generator is placed in the first mounting part, the second mounting part is mounted on the first mounting part along the extending direction of the first mounting part to form a first accommodating cavity, the other hand hole of the central pipe gallery of the steam generator is placed in the third mounting part, the first mounting part and the third mounting part are abutted along the extending direction of the first mounting part, a second accommodating cavity perpendicular to the first accommodating cavity is formed between the second mounting part and the third mounting part, the wedge is placed in the first accommodating cavity from the hand hole of the central pipe gallery, in which the first mounting part is placed, under the pulling of the first connecting part, the wedge can move in the first accommodating cavity and the second accommodating cavity and rotate 90 degrees between the heat transfer pipes so as to facilitate the transfer of the wedge to the position where the video probe and the foreign matter grabbing tool are located, thereby promoting the video probe and the foreign matter grabbing tool to operate, the efficiency of the video probe can be further improved, the efficiency of the foreign matter grabbing tool can be further reduced, and the problem of the radiant and the foreign matter grabbing tool can be solved.

Drawings

FIG. 1 is a schematic view of a guide device according to the present utility model;

FIG. 2 is a schematic view of a first mounting member of a guide device according to the present utility model;

FIG. 3 is a schematic view of a second mounting member of the guide device according to the present utility model;

fig. 4 is a schematic structural view of a third mounting member of the guide device provided by the present utility model.

In the figure:

1. a first mounting member; 11. a first through hole; 12. a guide rail groove; 13. a first connection block;

2. A second mounting member; 21. a first cross plate; 22. a first riser; 23. a guide rail; 24. a second connection block;

3. A third mount; 31. a second cross plate; 32. a second riser; 33. a third connecting block; 34. and a second through hole.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The guiding device provided by the utility model is used for guiding wedges to move between heat transfer tubes, referring to fig. 1 to 4, the guiding device comprises a first mounting piece 1, a second mounting piece 2 and a third mounting piece 3, the second mounting piece 2 is L-shaped and comprises a first transverse plate 21 and a first vertical plate 22 which are vertically connected, the third mounting piece 3 comprises a second transverse plate 31 and a second vertical plate 32 which are vertically connected, one end face of the first mounting piece 1 and one end face of the first vertical plate 22 are in sliding connection and form a first accommodating cavity, one end of the first mounting piece 1 and one end of the second vertical plate 32 are abutted along the extending direction of the first mounting piece 1, the first transverse plate 21 is abutted with the second transverse plate 31 and form a second accommodating cavity, the first accommodating cavity and the second accommodating cavity are communicated, two ends of the wedges are fixedly connected with a first connecting piece, the first connecting piece can extend out of the first accommodating cavity and the second accommodating cavity, and the first connecting piece can pull the wedges to reciprocate in the first accommodating cavity and the second accommodating cavity.

When the video probe and the foreign matter grabbing tool are jammed between the heat transfer pipes, one hand hole of the central pipe gallery of the steam generator is placed in the first mounting part 1, the second mounting part 2 is mounted on the first mounting part 1 along the extending direction of the first mounting part 1 to form a first accommodating cavity, the other hand hole of the central pipe gallery of the steam generator is placed in the third mounting part 3, the first mounting part 1 and the third mounting part 3 are abutted along the extending direction of the first mounting part 1, a second accommodating cavity perpendicular to the first accommodating cavity is formed between the second mounting part 2 and the third mounting part 3, the wedge is placed in the first accommodating cavity from the hand hole of the central pipe gallery, the wedge can move in the first accommodating cavity and the second accommodating cavity and rotate 90 degrees between the heat transfer pipes under the pulling of the first connecting part, so that the wedge is conveniently transmitted to the heat transfer pipe between the video probe and the clamping position of the grabbing tool, the video probe and the foreign matter grabbing tool can be conveniently promoted, accordingly, the efficiency of the foreign matter grabbing tool can be further improved, and the foreign matter grabbing efficiency of workers can be further reduced, and the efficiency of the personnel can be effectively solved.

It follows that the present utility model incorporates a channel within the steam generator that allows the wedges to move within the channel and enables 90 ° deflection of the wedges; meanwhile, the guide device can be assembled and disassembled inside the steam generator.

Specifically, the wedge block is made of a hard and non-deformable metal material, so that damage caused by collision between the wedge block and the clamping parts of the video probe and the foreign matter grabbing tool is avoided.

Specifically, the guide device only needs less than 1 hour from the installation completion to the feeding of the wedges into the heat transfer tube, compared with the traditional method of pushing the wedges to rotate by using long rods; compared with the traditional mode that a long rod is used for driving a metal wire to move the wedges from the heat transfer tube one by one, the method has the advantages that the working time is greatly saved, the efficiency is obviously improved, and the radiation irradiation dose of personnel is effectively reduced.

In particular, the utility model is particularly applicable to a scenario in which wedges move between heat transfer tubes in a steam generator comprising a central tube lane comprising a first hand hole and a second hand hole, and an outer ring lane comprising a third hand hole and a fourth hand hole, the first hand hole and the second hand hole being located at 0 ° and 180 ° of the steam generator, the third hand hole and the fourth hand hole being located at 90 ° and 270 ° of the steam generator. Thus, the first mounting member 1, the first riser 22 and the second riser 32 each extend in a direction of 0 ° to 180 °, while the first cross plate 21 and the second cross plate 31 extend in a direction of 90 ° to 270 °, the first connecting member protruding from one of the first hand hole and the third hand hole and the fourth hand hole, and the first connecting member being operated outside the hand hole of the steam generator such that the wedges are rotated and moved at 90 ° between the heat transfer tubes.

Preferably, the first connector is a wire. The wedge block is guided by the metal wire, so that the connection stability of the first connecting piece and the wedge block can be ensured, new foreign matters are prevented from being introduced into the steam generator, and the normal and stable operation of the steam generator is ensured.

Referring to fig. 2 and 4, the first mounting member 1 is provided with a first through hole 11 in an extending direction, the second riser 32 is provided with a second through hole 34 in an extending direction, and the second connecting member is sequentially provided through the first through hole 11 and the second through hole 34, and is capable of connecting the first mounting member 1 and the third mounting member 3. Under the effect of the second connecting piece, the first through hole 11 of the first mounting piece 1 and the second through hole 34 of the second vertical plate 32 of the third mounting piece 3 can be aligned and communicated, so that the first mounting piece 1 and the third mounting piece 3 can be connected and assembled quickly, and the mounting efficiency of the guide device is improved.

Specifically, the second connecting piece is arranged in the first through hole 11 of the first mounting piece 1 in a penetrating manner, the first mounting piece 1 provided with the second connecting piece in a penetrating manner is placed in one hand hole of the secondary side central pipe gallery of the steam generator, a part of the first mounting piece 1 is placed outside the steam generator, the second connecting piece is pushed out of one hand hole of the central pipe gallery to the other hand hole, the third mounting piece 3 is placed in the other hand hole of the central pipe gallery, the second connecting piece is arranged in the second through hole 34 in a penetrating manner, and under the guiding effect of the second connecting piece, the first mounting piece 1 and the third mounting piece 3 are mounted.

Specifically, the wire in the first through hole 11 has a diameter of 1mm and a length exceeding 10m.

Specifically, the first through hole 11 and the second through hole 34 are each provided with two. The arrangement is such that the two second connecting pieces pass through the two first through holes 11 and the two second through holes 34, respectively, to improve the stability of the connection between the first mounting piece 1 and the third mounting piece 3.

Preferably, the second connector is a wire. So set up, can be with first installed part 1 and the firm connection of third installed part 3 together, avoid introducing new foreign matter in steam generator, guarantee steam generator's normal steady operation.

Specifically, the connection between each installation piece of the guiding device adopts a metal wire guiding and mortise and tenon structure, and loose parts such as screws are not needed, so that the risk of foreign matters introduced in the using process of the guiding device is avoided, and the safety of a nuclear power plant is improved.

Referring to fig. 1 to 3, one of one end face of the first mount 1 and one end face of the second mount 2 is provided with a guide rail 23, and the other of one end face of the first mount 1 and one end face of the second mount 2 is provided with a guide rail groove 12, the guide rail 23 being slidably connected with the guide rail groove 12. By the arrangement, the first mounting piece 1 and the second mounting piece 2 can be conveniently and quickly connected and mounted together, and the first accommodating cavity is formed so as to facilitate the movement of the wedge in the guide device.

In particular, the present embodiment exemplarily shows a solution in which one end surface of the first mounting member 1 is provided with a rail groove 12, and the first end surface of the second mounting member 2 is provided with a rail 23.

Referring to fig. 1, 3 and 4, the junction of the first cross plate 21 and the first riser 22 is arc-shaped, and the junction of the first cross plate 21 and the first riser 22 abuts against the junction between the second cross plate 31 and the second riser 32. The arrangement can further enlarge the space range of the joint of the first accommodating cavity and the second accommodating cavity, ensure that the wedge block moves smoothly in the first accommodating cavity and the second accommodating cavity, avoid collision between the wedge block and the first mounting piece 1, the second mounting piece 2 and the third mounting piece 3, and ensure the fixed connection between the first mounting piece 1 and the second mounting piece 2 and the third mounting piece 3.

Referring to fig. 1 to 4, one end of the first mount 1 is provided with a first connection block 13, one end of the first riser 22 remote from the first cross plate 21 is provided with a second connection block 24, and one end of the second riser 32 remote from the second cross plate 31 is provided with a third connection block 33. When the length of the guide device needs to be increased to meet the actual use requirement, the same first mounting piece 1, second mounting piece 2 and third mounting piece 3 can be repeatedly manufactured, and clamping grooves are respectively formed in the newly processed first mounting piece 1, second mounting piece 2 and third mounting piece 3 so as to be connected with the first connecting block 13, the second connecting block 24 and the third connecting block 33, so that the wedges can reach the heat transfer tubes.

Preferably, the first connection block 13 is provided with two. So set up, not only can guarantee the fastness that first installed part 1 is connected with newly-processed third installed part 3 when needs increase guider's length, can also make operating personnel conveniently grip outside steam generator, guarantee the stability of first installed part 1.

Preferably, the guide means is made of stainless steel material.

The installation steps and the using steps of the utility model are as follows:

The second connecting piece is penetrated in the first through hole 11 of the first mounting piece 1, the first mounting piece 1 penetrated with the second connecting piece is put in from one hand hole of the secondary side central pipe gallery of the steam generator, a part of the first mounting piece 1 is left to be put outside the steam generator, and the second mounting piece 2 is put in from one hand hole of the secondary side central pipe gallery of the steam generator and is connected with the first mounting piece 1 through the structures of the guide rail 23 and the guide rail groove 12; pushing the second connecting piece out of one hand hole of the central pipe gallery to the other hand hole, putting the third mounting piece 3 in from the position of the other hand hole of the central pipe gallery, penetrating the second connecting piece into the second through hole 34, and under the action of the second connecting piece, completing the mounting of the first mounting piece 1 and the third mounting piece 3, and abutting the first transverse plate 21 of the second mounting piece 2 with the second transverse plate 31 of the third mounting piece 3, thereby completing the mounting of the guide device;

Aligning the assembled guiding device between the video probe and the heat transfer tube where the clamping part of the foreign matter grabbing tool is located, feeding the first connecting piece on the wedge block from the first accommodating cavity between the first mounting piece 1 and the second mounting piece 2, bending the first connecting piece by 90 degrees along the first accommodating cavity and the second accommodating cavity, feeding the first connecting piece between the video probe and the heat transfer tube where the clamping part of the foreign matter grabbing tool is located under the assistance of the observation of an endoscope until the first connecting piece is fed out to the outer ring gallery of the steam generator, and pulling the first connecting piece out from the hand hole at the outer ring gallery;

Pulling the first connecting piece from the hand hole of the outer ring gallery to drive the wedge block to enter the guide device from the first accommodating cavity and enter the space between the heat transfer pipes through the guide device, and pulling the first connecting piece to enable the wedge block to strike the clamping position of the video probe and the foreign matter grabbing tool until the video probe is separated from the foreign matter grabbing tool;

Pulling the first connector from one of the hand holes at the central tube gallery to pull the wedges out of between the tubes of the heat transfer tube;

And the third mounting piece 3, the second mounting piece 2 and the first mounting piece 1 are disassembled in the steam generator in sequence, and are taken out of the steam generator after being disassembled.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The guide device is used for guiding the wedge to move among the heat transfer tubes and is characterized by comprising a first mounting piece (1), a second mounting piece (2) and a third mounting piece (3), wherein the second mounting piece (2) is L-shaped and comprises a first transverse plate (21) and a first vertical plate (22) which are vertically connected, the third mounting piece (3) comprises a second transverse plate (31) and a second vertical plate (32) which are vertically connected, one end face of the first mounting piece (1) is in sliding connection with one end face of the first vertical plate (22) and is provided with a first accommodating cavity, one end of the first mounting piece (1) is in butt joint with one end of the second vertical plate (32) along the extending direction of the first mounting piece (1), the first transverse plate (21) is in butt joint with the second transverse plate (31) and is provided with a second accommodating cavity, the first accommodating cavity is communicated with the second accommodating cavity, the first mounting piece (1) is fixedly connected with one end face of the first vertical plate (22) and is formed with a first accommodating cavity, and the first connecting piece can be fixedly connected with the first connecting piece and the second accommodating cavity can be accommodated in the first reciprocating cavity.

2. The guide device of claim 1, wherein the first connector is a wire.

3. The guiding device according to claim 1, characterized in that the first mounting member (1) is provided with a first through hole (11) along the extension direction, the second riser (32) is provided with a second through hole (34) along the extension direction, a second connecting member is sequentially arranged through the first through hole (11) and the second through hole (34), and the second connecting member can connect the first mounting member (1) and the third mounting member (3).

4. A guiding device according to claim 3, characterized in that both the first through hole (11) and the second through hole (34) are provided with two.

5. A guide device according to claim 3, wherein the second connector is a wire.

6. The guiding device according to claim 1, characterized in that one of the one end face of the first mounting member (1) and the one end face of the second mounting member (2) is provided with a guide rail (23), the other of the one end face of the first mounting member (1) and the one end face of the second mounting member (2) is provided with a guide rail groove (12), and the guide rail (23) is slidably connected with the guide rail groove (12).

7. The guiding device according to claim 1, characterized in that the connection of the first transverse plate (21) and the first vertical plate (22) is arc-shaped, and the connection of the first transverse plate (21) and the first vertical plate (22) is abutted with the connection between the second transverse plate (31) and the second vertical plate (32).

8. Guide device according to claim 1, characterized in that one end of the first mounting (1) is provided with a first connection block (13), one end of the first riser (22) remote from the first cross plate (21) is provided with a second connection block (24), and one end of the second riser (32) remote from the second cross plate (31) is provided with a third connection block (33).

9. Guide device according to claim 8, characterized in that the first connection block (13) is provided with two.

10. The guide device according to any one of claims 1-9, wherein the guide device is made of stainless steel material.