CN114800388A

CN114800388A - Dismounting device

Info

Publication number: CN114800388A
Application number: CN202210569269.6A
Authority: CN
Inventors: 孙来战; 孟健; 王东利; 杨东强; 冯战涛
Original assignee: China General Nuclear Power Corp; CGN Power Co Ltd; China Nuclear Power Operation Co Ltd
Current assignee: China General Nuclear Power Corp; CGN Power Co Ltd; China Nuclear Power Operation Co Ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-07-29
Anticipated expiration: 2042-05-24
Also published as: CN114800388B

Abstract

The invention relates to a dismounting device, which comprises a plurality of dismounting structures, wherein each dismounting structure comprises: a main body, one end of which is inserted into a bolt hole of the steam generator; the limiting block is connected with the main body and protrudes out of the main body along the radial direction of the main body; the support arm, one end can rotate around the main part, and the support arm deviates from the radial protruding main part of main part is followed to the one end of main part, and is used for restricting the welt to remove towards the direction that deviates from steam generator. When the dismounting device is used for mounting the lining plate, one end of the main body is inserted into the bolt hole, and the movement of the lining plate is limited by the end, far away from the main body, of the supporting arm, so that the lining plate is prevented from falling. The workman rotates the welt, adjusts the position of welt, adopts the bolt to be connected welt and steam generator. The workman only needs to lift the welt to hugging closely with steam generator, when the welt was by the dismouting structural constraint, can withdraw from the installation scene, leave a workman rotate the welt can, easy operation is convenient.

Description

Dismounting device

Technical Field

The invention relates to the technical field of disassembling tools, in particular to a disassembling device.

Background

The manhole is opened to steam generator in order to conveniently overhaul inside the steam generator to make things convenient for the workman to get into inside the steam generator by the manhole, overhaul steam generator inside. However, when the steam generator works normally, the manhole needs to be plugged by installing a sealing structure to ensure that the steam generator can work normally; when the maintenance is carried out, the sealing structure needs to be detached, and workers can conveniently enter the steam generator through the manhole.

Currently, sealing structures include a liner, a sealing gasket, and a screw. When the sealing structure is installed, a plurality of workers are required to lift the lining plate to the position of the hole, another worker observes the relative position between the bolt hole of the lining plate and the bolt hole of the steam generator, and the lining plate is matched with the workers lifting the lining plate through the workers, so that the position of the lining plate is adjusted, and the bolt hole of the lining plate corresponds to the bolt hole of the steam generator. And then a sealing washer is placed between the lining plate and the steam generator, and finally the lining plate, the sealing washer and the steam generator are connected through screws, so that the aim of plugging the manhole by the sealing structure is fulfilled, and the steps are opposite when the sealing structure is disassembled.

However, the time required for lifting the lining plate and adjusting the lining plate by a plurality of workers is long, on one hand, the exposure time of the workers is prolonged, the exposure measurement is large, and the physical health of the workers is damaged; on the other hand, the lining plate is heavy, the worker cannot support the lining plate by strength for a long lifting time, and the lining plate can fall down to collide with the steam generator to damage the steam generator.

Disclosure of Invention

On the basis, the time required for lifting the lining plate and adjusting the lining plate by a plurality of workers is long, on one hand, the exposure time of the workers is prolonged, the exposure measurement is large, and the physical health of the workers is damaged; on the other hand, because the lining plate is heavy in weight, the lining plate is not supported by the worker for a long lifting time, and the lining plate possibly falls, so that the lining plate collides with a steam generator to damage the steam generator.

An embodiment of the present application provides a dismounting device, including a plurality of dismouting structures, the dismouting structure includes:

a main body, one end of which is inserted into a bolt hole of the steam generator;

the limiting block is connected with the main body and protrudes out of the main body along the radial direction of the main body so as to limit the length of the main body extending into the bolt hole; and

the support arm, the one end of support arm can rotate around the main part, and the support arm deviates from the radial protrusion main part of main part along the one end of main part to be used for restricting the welt to remove towards the direction that deviates from steam generator.

When the dismounting device is used for mounting the lining plate, the steam generator is provided with a plurality of bolt holes which are annularly arranged. A plurality of dismounting structures are arranged in the bolt holes at even intervals, and one end of the main body of each dismounting structure is inserted into each bolt hole. Because the stopper is connected with the main part, and the stopper is along the radial protrusion main part of main part to when the main part inserts the bolt hole, the stopper can with steam generator butt, thereby the restriction main part stretches into the length in the bolt hole. The lining plate is lifted by workers, so that the lining plate is tightly attached to the steam generator to plug the manhole. Because the one end of support arm can rotate around the main part, thereby hug closely the back when welt and steam generator, one end and the main part through the support arm rotate, the one end that the main part was kept away from to the drive support arm rotates, the one end that makes the support arm keep away from the main part is in the welt and deviates from one side of steam generator, at this moment, the welt is located between the one end that the main part was kept away from to the support arm and the steam generator, the one end that the main part was kept away from to the support arm is used for restricting the welt and removes towards the direction that deviates from steam generator, prevent that the welt from falling. Because the main part of a plurality of dismouting structures is evenly spaced inserts a plurality of bolt holes to can keep away from the welt at the support arm between the one end of main part and the steam generator along the circumference of welt, the position of welt then is restricted by a plurality of dismouting structures like this, need not the workman and lifts the welt always, shortens workman's the time of being illuminated. After the position of welt is restricted to a plurality of dismouting structures, only need a workman to rotate the welt for the outer peripheral face of welt rotates between a plurality of dismouting structures, thereby can adjust the position of welt, makes the second screwed hole of seting up on the first screw hole of seting up on the welt and the steam generator align, then adopts the bolt to pass first screw hole and second screw hole, is connected welt and steam generator. In the process, a worker only needs to lift the lining plate to be tightly attached to the steam generator, when the position of the lining plate is limited by a plurality of dismounting structures, the worker can withdraw from an installation site, the worker is left to rotate the lining plate and connect the lining plate with the steam generator, the operation is simple and convenient, and the installation time is shortened. The disassembly process is reversed.

In one embodiment, the dismounting structure further comprises: the rotation portion is located between the supporting arm and the limiting block and is connected with the main body in a rotating mode, and the outer peripheral face of the rotation portion is used for being matched with the outer peripheral face of the lining plate in a rolling mode.

In one embodiment, the main body has a mounting protrusion protruding in a radial direction, and the support arm and the rotating portion are respectively mounted on both sides of the mounting protrusion.

In one embodiment, the dismounting structure further comprises a limit pin, the support arm is provided with a first hole, and the limit pin can penetrate through the first hole;

the main body is provided with a second hole, the limiting pin can extend into or move out of the second hole so as to lock or release the supporting arm, and when the limiting pin sequentially extends into the first hole and the second hole, the supporting arm is used for limiting the lining plate to move towards the direction departing from the steam generator;

the third hole has been seted up to the main part, and the spacer pin can stretch into or shift out the third hole to locking or release the support arm, wherein, when the spacer pin stretched into first hole and third hole in proper order, the support arm removed the restriction welt.

In one embodiment, the limit pin comprises a pin body and a baffle plate, one end of the pin body penetrates through the first hole, and one end of the pin body, which penetrates through the first hole, is connected with the baffle plate.

In one embodiment, the end of the support arm facing away from the main body is provided with a ball for rolling engagement with the liner plate.

In one of the embodiments, the first and second parts of the device,

one end of the main body inserted into the bolt hole is provided with a mounting hole, and the hole wall of the mounting hole is provided with a positioning through hole;

the dismouting structure still includes:

the expansion claw is positioned in the positioning through hole and is of an elastic structure with elastic force; and

tensile taper rod, tensile taper rod are located the inside of mounting hole, and tensile taper rod is including the first portion and the second portion that are connected, and the main part is worn out along the direction that stretches out the bolt hole to can follow the axial displacement of main part, the second portion sets up in the one end of the orientation main part of first portion, deviates from the direction of first portion along the second portion, and the external diameter of second portion increases gradually.

In one embodiment, the expansion jaw comprises:

the elastic supporting claw is positioned in the positioning through hole; and

the cushion, cushion and elasticity prop the claw and deviate from one side of tensile taper rod and be connected.

In one embodiment, the dismounting structure further comprises a driving part, and the driving part is connected with the part of the first part penetrating out of the main body and is used for driving the first part to move along the axial direction of the main body.

In one embodiment, the end of the first portion extending beyond the body is threaded;

the driving part comprises a stretching nut and a spanner, and the stretching nut is in threaded fit with the first part; the wrench drives the tension nut to rotate, thereby causing the first portion to move in an axial direction of the body.

Drawings

FIG. 1 is a schematic view of a connection relationship between a mounting/dismounting device, a liner plate and a steam generator according to an embodiment;

FIG. 2 is a schematic view of the disassembled structure of FIG. 1;

FIG. 3 is a schematic view of the structure of the limit pin of FIG. 2;

FIG. 4 is a schematic view of the structure of the stretching screw and the expansion claw;

FIG. 5 is a schematic structural view of a second hole, a third hole and a mounting protrusion;

fig. 6 is a schematic view of the connection relationship of the main body, the stretching taper rod and the expansion claw.

Description of reference numerals:

a disassembly and assembly structure 100;

a main body 110; a mounting boss 111; a second hole 101; a third bore 102;

a stopper 120;

a support arm 130;

a rotating portion 140;

a spacing pin 150; a pin body 151; a baffle 152;

a bull's eye bearing 160; the balls 161;

an expansion jaw 170; an elastic supporting claw 171; a soft pad 172;

stretching the conical rod 180; a first portion 181; a second portion 182;

stretching the nut 191;

a steam generator 200;

bolt holes 201;

a liner plate 210; a first threaded aperture 202.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

Referring to fig. 1 and fig. 2, an embodiment of the present application provides a dismounting device, which includes a plurality of dismounting structures 100, wherein the dismounting structures 100 include a main body 110, a limiting block 120, and a supporting arm 130.

One end of the body 110 is for insertion into the bolt hole 201 of the steam generator 200. The stopper 120 is coupled to the main body 110, and the stopper 120 protrudes from the main body 110 in a radial direction of the main body 110 to limit a length of the main body 110 extending into the bolt hole 201. One end of the support arm 130 is rotatable around the main body 110, and the end of the support arm 130 facing away from the main body 110 protrudes out of the main body 110 in a radial direction of the main body 110 and serves to restrict the movement of the liner plate 210 in a direction facing away from the steam generator 200.

When the mounting and dismounting device is used for mounting the lining plate 210, the steam generator 200 is provided with a plurality of bolt holes 201, and the bolt holes 201 are annularly arranged. A plurality of attaching and detaching structures 100 are uniformly spaced in bolt holes 201, and one end of main body 110 of attaching and detaching structure 100 is inserted into bolt hole 201. Since the stopper 120 is coupled to the body 110 and the stopper 120 protrudes from the body 110 in the radial direction of the body 110, when the body 110 is inserted into the bolt hole 201, the stopper 120 can abut against the steam generator 200, thereby limiting the length of the body 110 extending into the bolt hole 201. The worker lifts the liner 210 so that the liner 210 is closely attached to the steam generator 200 to close the manhole. Because one end of the supporting arm 130 can rotate around the main body 110, after the lining plate 210 is tightly attached to the steam generator 200, one end of the supporting arm 130 rotates with the main body 110 to drive one end of the supporting arm 130 away from the main body 110 to rotate, so that one end of the supporting arm 130 away from the main body 110 is positioned on one side of the lining plate 210 away from the steam generator 200, at the moment, the lining plate 210 is positioned between one end of the supporting arm 130 away from the main body 110 and the steam generator 200, and one end of the supporting arm 130 away from the main body 110 is used for limiting the lining plate 210 to move towards the direction away from the steam generator 200, so that the lining plate 210 is prevented from falling. Since the main bodies 110 of the plurality of disassembling and assembling structures 100 are inserted into the plurality of bolt holes 201 at regular intervals, the lining plate 210 can be limited between one end of the supporting arm 130 far away from the main body 110 and the steam generator 200 along the circumferential direction of the lining plate 210, so that the position of the lining plate 210 is limited by the plurality of disassembling and assembling structures 100, a worker is not required to lift the lining plate 210 all the time, and the exposure time of the worker is shortened. After the plurality of disassembling and assembling structures 100 limit the position of the lining plate 210, only one worker needs to rotate the lining plate 210, so that the outer circumferential surface of the lining plate 210 rotates between the plurality of disassembling and assembling structures 100, the position of the lining plate 210 can be adjusted, a first threaded hole 202 formed in the lining plate 210 is aligned with a second threaded hole (not shown) formed in the steam generator 200, and then bolts are used to pass through the first threaded hole 202 and the second threaded hole to connect the lining plate 210 with the steam generator 200. In the process, a worker only needs to lift the lining plate 210 to be tightly attached to the steam generator 200, when the position of the lining plate 210 is limited by the plurality of dismounting structures 100, the worker can withdraw from the installation site, and only one worker needs to rotate the lining plate 210 and connect the lining plate 210 with the steam generator 200, so that the operation is simple and convenient, and the installation time is shortened. The disassembly process is reversed.

In this application, the quantity of stopper 120 is two, follows the even interval setting of circumference of main part 110 to two stoppers 120 can be followed same direction and hugged closely with steam generator 200, thereby make main part 110 circumference atress stable, prevent that main part 110 from taking place to rock in the use.

Referring to fig. 2, in an embodiment, the dismounting structure 100 further includes a rotating portion 140. The rotating part 140 is located between the supporting arm 130 and the stopper 120, and the rotating part 140 is rotatably connected to the main body 110, and the outer peripheral surface of the rotating part 140 is configured to be in rolling fit with the outer peripheral surface of the lining plate 210.

Specifically, since the rotation portion 140 is located between the support arm 130 and the stopper 120, the rotation portion 140 is rotatably connected to the main body 110, and the outer circumferential surface of the rotation portion 140 is in rolling engagement with the outer circumferential surface of the lining plate 210, so that when a worker rotates the lining plate 210, the outer circumferential surface of the lining plate 210 is in rolling engagement with the outer circumferential surface of the rotation portion 140, so that sliding friction between the outer circumferential surface of the lining plate 210 and the main body 110 is converted into rolling friction between the outer circumferential surface of the lining plate 210 and the rotation portion 140, thereby reducing friction force, and the worker can easily rotate the lining plate 210, thereby adjusting the position of the lining plate 210.

Referring to fig. 2, in an embodiment, the main body 110 has a mounting protrusion 111 protruding in a radial direction, and the supporting arm 130 and the rotating part 140 are respectively mounted on two sides of the mounting protrusion 111, so as to facilitate positioning of the supporting arm 130 and the rotating part 140 and mounting of the supporting arm 130 and the rotating part 140.

Referring to fig. 2 and 5, in an embodiment, the detachable structure 100 further includes a limit pin 150, the supporting arm 130 is formed with a first hole (not shown), and the limit pin 150 can pass through the first hole. The main body 110 has a second hole 101, and the limit pin 150 can extend into or move out of the second hole 101 to lock or release the support arm 130, wherein when the limit pin 150 sequentially extends into the first hole and the second hole 101, the support arm 130 is used to limit the movement of the lining plate 210 in a direction away from the steam generator 200. The main body 110 further defines a third hole 102, and the limit pin 150 can extend into or move out of the third hole 102 to lock or release the supporting arm 130, wherein when the limit pin 150 sequentially extends into the first hole and the third hole 102, the supporting arm 130 releases the limiting liner 210.

Specifically, before the worker lifts the liner plate 210 and attaches the liner plate 210 to the steam generator 200, the stopper pin 150 is inserted through the first hole and inserted into the third hole 102 to lock the support arm 130, so that the support arm 130 cannot rotate with the main body 110. At this time, the end of the supporting arm 130 away from the main body 110 extends outward along the radial direction of the liner 210, so that when the worker lifts the liner 210 and fits the liner 210 to the steam generator 200, the end of the supporting arm 130 away from the main body 110 does not obstruct the liner 210 from being fitted to the steam generator 200. After the lining plate 210 is tightly attached to the steam generator 200, the limit pin 150 is moved out of the third hole 102, and the support arm 130 is released, so that the support arm 130 can rotate relative to the main body 110, and when the support arm 130 rotates to a position where the first hole is opposite to the second hole 101, the limit pin 150 passes through the first hole and extends into the second hole 101, so as to lock the support arm 130, and the support arm 130 cannot rotate relative to the main body 110. At this time, the end of the supporting arm 130 away from the main body 110 protrudes inward in the radial direction of the liner 210, and serves to restrict the liner 210 from moving in a direction away from the steam generator 200, and prevent the liner 210 from falling. The limiting pin 150 penetrates through the first hole and is matched with the second hole 101 and the third hole 102 respectively, so that the lining plate 210 is limited to move towards the direction departing from the steam generator 200 or the limitation is removed, and the lining plate 210 is convenient to mount.

Referring to fig. 5, in the present embodiment, the mounting protrusion 111 is provided with a second hole 101 and a third hole 102.

Referring to fig. 2 and 3, in an embodiment, the limit pin 150 includes a pin body 151 and a blocking plate 152, one end of the pin body 151 passes through a first hole, and one end of the pin body 151 passing through the first hole is connected to the blocking plate 152.

Specifically, since the pin body 151 is connected to the blocking plate 152 through the end of the first hole, the blocking plate 152 can block the pin body 151 from passing through the first hole in a direction away from the steam generator 200, so that the stopper pin 150 is connected to the support arm 130 through the blocking plate 152, and the stopper pin 150 does not need to be carried separately when in use. And, when the stopper pin 150 is engaged with the second hole 101 or the third hole 102, the blocking plate 152 can be extended into or moved out of the second hole 101 to lock or release the support arm 130.

Referring to fig. 2 and 3, in an embodiment, the supporting arm 130 is closely attached to the main body 110, a sliding groove (not shown) is formed on one side of the main body 110 closely attached to the supporting arm 130, and the second hole 101 and the third hole 102 are respectively formed on a groove bottom of the sliding groove, and the sliding groove is used for accommodating the baffle 152.

Specifically, since the supporting arm 130 is closely attached to the main body 110, a sliding slot is formed on one side of the main body 110, which is closely attached to the supporting arm 130, and when the limit pin 150 moves out of the second hole 101 or the third hole 102, that is, the baffle 152 moves out of the second hole 101 or the third hole 102, the baffle 152 is located in the sliding slot and can move in the sliding slot.

In the present embodiment, the mounting projection 111 is slotted.

Referring to fig. 2 and 3, in an embodiment, the detachable structure 100 further includes a first elastic member (not shown), one end of the first elastic member is connected to the blocking plate 152, and the other end of the first elastic member is connected to the supporting arm 130, and an elastic force of the first elastic member is used to drive the blocking plate 152 to extend into the second hole 101 or the third hole 102.

Specifically, since one end of the first elastic member is connected to the blocking plate 152 and the other end is connected to the support arm 130, a worker may pull the pin body 151 so that the blocking plate 152 moves out of the second hole 101 or the third hole 102 against the elastic force of the first elastic member. When the baffle 152 extends into the second hole 101 or the third hole 102, the baffle 152 is driven by the elastic force of the first elastic member to extend into the second hole 101 or the third hole 102, so that the baffle 152 is not easy to pass out of the second hole 101 or the third hole 102, and the support arm 130 is prevented from rotating in the using process.

Referring to fig. 2 and 3, in an embodiment, a ball 161 is disposed at an end of the supporting arm 130 away from the main body 110, and the ball 161 is configured to be in rolling fit with the lining plate 210, so that during the rotation of the lining plate 210, a side of the lining plate 210 away from the steam generator 200 is in rolling fit with the ball 161, and sliding friction between the side of the lining plate 210 away from the steam generator 200 and the supporting arm 130 is converted into rolling friction between the side of the lining plate 210 away from the steam generator 200 and the ball 161, thereby facilitating a worker to push the lining plate 210, and simultaneously preventing the side of the lining plate 210 away from the steam generator 200 from being damaged due to an excessive friction force.

In this embodiment, the dismounting structure 100 further includes a bull's eye bearing 160, the bull's eye bearing 160 is disposed at an end of the supporting arm 130 away from the main body 110, the bull's eye bearing 160 has a ball 161, and the bull's eye bearing 160 is disposed to facilitate the installation of the ball 161.

Referring to fig. 2 and 4, in an embodiment, an end of the main body 110 inserted into the bolt hole 201 is provided with a mounting hole (not shown), and a hole wall of the mounting hole is provided with a positioning through hole (not shown). The disassembly and assembly structure 100 further comprises an expansion claw 170 and a tension taper rod 180. The expansion claw 170 is located in the positioning through hole, and the expansion claw 170 is an elastic structure having an elastic force. The tension cone rod 180 is located in the installation hole, the tension cone rod 180 includes a first portion 181 and a second portion 182 connected, one end of the first portion 181 extends out of the main body 110 and can move along the axial direction of the main body 110, the second portion 182 is disposed at one end of the first portion 181 facing the main body 110, and the outer diameter of the second portion 182 gradually increases along the direction that the second portion 182 faces away from the first portion 181.

Specifically, since the expansion claws 170 are located in the positioning through holes, the tension cone rod 180 is located in the mounting hole, so that the tension cone rod 180 can be opposed to the expansion claws 170. The tension cone 180 includes a first portion 181 and a second portion 182 connected, and the first portion 181 is extended out of the body 110 in a direction protruding out of the bolt hole 201, so that when the first portion 181 is moved in the axial direction of the body 110, the first portion 181 or the second portion 182 is caused to oppose the expansion claw 170. Because the outer diameter of the second part 182 is gradually increased along the direction in which the second part 182 deviates from the first part 181, when the expansion claw 170 is opposite to the second part 182, the second part 182 supports the expansion claw 170, so that the expansion claw 170 extends out of the positioning through hole and is tightly attached to the hole wall of the bolt hole 201, and further, the main body 110 is tightly attached to the hole wall of the bolt hole 201, and the main body 110 is prevented from falling out of the bolt hole 201 when the dismounting structure 100 is in use. After the use, the first portion 181 moves in the axial direction of the main body 110, so that the expansion claw 170 is opposite to the first portion 181, and since the expansion claw 170 has an elastic structure having an elastic force, after the second portion 182 cannot support the expansion claw 170, the expansion claw 170 moves in a direction away from the hole wall of the bolt hole 201 due to the elastic force of the expansion claw 170, and is separated from the hole wall of the bolt hole 201, thereby facilitating the removal of the detachable structure 100 from the bolt hole 201.

Referring to fig. 2 and 4, in one embodiment, the expansion claw 170 includes a flexible support claw 171 and a cushion 172. The elastic supporting claw 171 is located at the positioning through hole. The soft pad 172 is connected to the side of the elastic support claw 171 facing away from the tension cone rod 180, so that the soft pad 172 abuts against the wall of the bolt hole 201. The soft pad 172 is made of soft material, so that the wall of the bolt hole 201 is not easily damaged when the soft pad is tightly attached to the wall of the bolt hole 201.

Referring to fig. 2 and 6, in an embodiment, the disassembling and assembling structure 100 further includes a driving portion, which is connected to a portion of the first portion 181 penetrating through the main body 110 and is used for driving the first portion 181 to move along an axial direction of the main body 110, so that the expansion claw 170 can be opposite to the first portion 181 or the second portion 182 of the tension taper rod 180. When the expansion claw 170 is opposed to the first portion 181, the expansion claw 170 is separated from the hole wall of the bolt hole 201, facilitating the removal of the main body 110 out of the bolt hole 201; when the expansion claw 170 is opposite to the second portion 182, the expansion claw 170 is tightly attached to the hole wall of the bolt hole 201, so that the main body is fixed in the bolt hole 201, and the dismounting structure 100 is prevented from falling out of the bolt hole 201 when in use.

In one embodiment, the end of the first portion 181 extending out of the body 110 is threaded. The drive portion includes a tension nut 191 and a wrench (not shown), the tension nut 191 being threadedly engaged with the first portion 181. The wrench drives the tension nut 191 to rotate, thereby moving the first portion 181 in the axial direction of the body 110.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a dismouting device which characterized in that includes a plurality of dismouting structures, the dismouting structure includes:

a main body having one end inserted into a bolt hole of the steam generator;

the supporting arm, the one end of supporting arm can wind the main part rotates, the supporting arm deviates from the one end of main part is followed the radial protrusion of main part the main part is used for restricting the welt to move towards the direction that deviates from steam generator.

2. The disassembly and assembly device of claim 1, wherein the disassembly and assembly structure further comprises: the rotation portion, the rotation portion be located the support arm with between the stopper, just the rotation portion with the main part rotates and is connected, the outer peripheral face of rotation portion be used for with the outer peripheral face roll fit of welt.

3. The attaching and detaching device according to claim 2, wherein the main body has a mounting projection projecting in a radial direction, and the support arm and the rotating portion are respectively mounted on both sides of the mounting projection.

4. The dismounting device according to any one of claims 1 to 3, wherein the dismounting structure further comprises a limit pin, the support arm is provided with a first hole, and the limit pin can pass through the first hole;

the third hole has been seted up to the main part, the spacer pin can stretch into or shift out the third hole to locking or release the support arm, wherein, the spacer pin stretches into in proper order first hole with during the third hole, the support arm removes the restriction welt.

5. The disassembly and assembly device of claim 4, wherein the limit pin comprises a pin body and a baffle plate, one end of the pin body passes through the first hole, and one end of the pin body passing through the first hole is connected with the baffle plate.

6. A mounting and dismounting device according to any one of claims 1 to 3, characterised in that the end of the support arm facing away from the main body is provided with a ball for rolling engagement with the backing plate.

7. A dismounting device according to any one of claims 1 to 3,

one end of the main body, which is inserted into the bolt hole, is provided with a mounting hole, and the hole wall of the mounting hole is provided with a positioning through hole;

the dismouting structure still includes:

the stretching taper rod is located inside the mounting hole and comprises a first portion and a second portion which are connected, one end of the first portion extends out of the main body and can move along the axial direction of the main body, the second portion is arranged at one end of the first portion, which faces towards the main body, and the outer diameter of the second portion gradually increases along the direction in which the second portion deviates from the first portion.

8. The disassembly and assembly device of claim 7, wherein the expansion claw comprises:

the elastic supporting claw is positioned in the positioning through hole; and

the cushion, the cushion with elasticity props the claw and deviates from one side of tensile awl pole is connected.

9. The device according to claim 7, wherein the detachable structure further comprises a driving part connected to a portion of the first part extending out of the main body, for driving the first part to move along the axial direction of the main body.

10. The device according to claim 9, wherein the first portion has a thread at an end thereof protruding from the body;

the driving part comprises a stretching nut and a spanner, and the stretching nut is in threaded fit with the first part; the wrench drives the tension nut to rotate, so that the first part moves along the axial direction of the main body.