CN114571168B

CN114571168B - Steam generator tube bundle assembly assembling and positioning device and method

Info

Publication number: CN114571168B
Application number: CN202210164656.1A
Authority: CN
Inventors: 黄倩影; 包士梅; 王永明; 白福岩; 刘连伟; 方兴; 张学斌; 姜宇婷
Original assignee: He Qinhuangdao Heavy Equipment Co ltd
Current assignee: He Qinhuangdao Heavy Equipment Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2023-10-27
Anticipated expiration: 2042-02-22
Also published as: CN114571168A

Abstract

The invention discloses a device and a method for assembling and positioning a tube bundle assembly of a steam generator, wherein the device comprises a connecting tube assembly and an anti-sagging device, wherein the connecting tube assembly is used for temporary fixation when a supporting plate is installed, and the anti-sagging device is arranged on the connecting tube assembly to support and fix a U-shaped tube bundle in an anti-sagging way. The device and the method for assembling and positioning the tube bundle component of the steam generator can realize the installation and positioning of the supporting plate, alignment, sagging control of the tube bundle component and rotation and turning over of the tube bundle component in the manufacturing process of the tube bundle component under the semi-exposed state, and can meet the manufacturing precision requirement of the steam generator.

Description

Steam generator tube bundle assembly assembling and positioning device and method

Technical Field

The invention relates to the field of assembly of tube bundle components of steam generators, in particular to an assembly positioning device and method of a tube bundle component of a steam generator.

Background

The steam generator is a heat exchange device for steam required by a steam turbine, and a steam generator tube bundle assembly mainly comprises a shell assembly, a sleeve, a tube support plate, a pull rod, a U-shaped tube, a vibration-proof strip and the like, and the manufacturing process flow of the steam generator tube bundle assembly is generally as follows: the lower shell assembly is firstly welded, then the inner sleeve and the supporting plate are installed, and the tube penetrating process of the U-shaped tube is carried out.

However, the tube bundle assembly is in a semi-exposed state during assembly and without any support, positioning, the support plate installation, the U-tube assembly, and rotation during manufacture are required to be completed. Moreover, the tube penetrating process of the U-shaped tubes is from bottom to top, and due to the action of gravity, the whole tube bundle part sags along with the increase of the number of the penetrated U-shaped tubes, extrusion can be generated between the tubes, and the product can be adversely affected due to the excessive sagging amount. Steam generators have stringent requirements on the amount of sagging of the tube bundle, and thus control of the sagging of the tube bundle is necessary. However, there is a lack of devices and methods in the prior art that effectively address the manufacturing challenges described above.

Therefore, it is necessary to provide a device and a method for assembling and positioning a tube bundle assembly of a steam generator, so as to ensure that the tube bundle assembly is manufactured in a semi-exposed state, and ensure the manufacturing precision and quality of products.

Disclosure of Invention

In order to overcome the problems, the inventor has made intensive studies and has devised a steam generator tube bundle assembly assembling and positioning device which realizes temporary fixation when a support plate is installed, fixation of a sagging preventing device and rotation operation of a tube bundle assembly on a roller frame through a connecting cylinder assembly; the sagging control of the U-shaped tube bundles is realized through the sagging prevention device; the assembly positioning device is simple in structure, convenient to operate, wide in application range and high in precision and quality of manufactured products, and therefore the invention is completed.

In particular, it is an object of the present invention to provide the following aspects:

in a first aspect, there is provided a steam generator tube bundle assembly fitting positioning device, the device comprising a connector tube assembly and a sag prevention device, wherein,

the connecting cylinder assembly is used for temporarily fixing the supporting plate during installation,

the anti-sagging device is arranged on the connecting cylinder assembly to support and fix the U-shaped tube bundles in an anti-sagging mode.

In a second aspect, there is provided a method of positioning a steam generator tube bundle assembly, preferably using the apparatus of the first aspect, wherein the method comprises the steps of:

step 1, pre-installing a supporting plate;

step 2, fixing the position of the supporting plate;

and 3, performing anti-sagging control on the U-shaped tube bundles.

The invention has the beneficial effects that:

(1) The steam generator tube bundle assembly assembling and positioning device provided by the invention has the advantages of simple structure, convenience in operation and strong practicability;

(2) The steam generator tube bundle assembly assembling and positioning device and method provided by the invention can realize the completion of the installation and positioning of the supporting plate, the alignment and the sagging control of the tube bundle assembly and the rotation and turning over of the tube bundle assembly in the manufacturing process of the tube bundle assembly in a semi-exposed state;

(3) The assembling and positioning device and method for the tube bundle assembly of the steam generator can meet the manufacturing precision and quality requirements of the tube bundle assembly.

Drawings

FIG. 1 illustrates a schematic view of a semi-bare state steam generator tube bundle assembly;

FIG. 2 is a schematic view showing a steam generator tube bundle assembly fitting positioning device in use according to a preferred embodiment of the present invention;

FIG. 3 illustrates a schematic side view of a connector barrel assembly in accordance with a preferred embodiment of the present invention;

FIG. 4 shows a schematic view of section B-B of FIG. 3;

fig. 5 shows a schematic view of a support plate fixture according to a preferred embodiment of the present invention;

FIG. 6 shows a schematic view of a carrier rod according to a preferred embodiment of the invention;

FIG. 7 shows a schematic view of a connection plate according to a preferred embodiment of the invention;

FIG. 8 shows a schematic view of an arc plate according to a preferred embodiment of the present invention;

FIG. 9 is a schematic view showing the overall structure of a center connection assembly according to a preferred embodiment of the present invention;

FIG. 10 illustrates a schematic side view of a center connection assembly in accordance with a preferred embodiment of the present invention;

FIG. 11 is a schematic view showing the overall structure of a side connection assembly according to a preferred embodiment of the present invention;

FIG. 12 illustrates a side schematic view of a side connection assembly in accordance with a preferred embodiment of the present invention;

fig. 13 shows a schematic view of the connection of a caliper to an anti-vibration bar end cap according to a preferred embodiment of the present invention.

Reference numerals illustrate:

1-tube plate;

2-a half cylinder;

3-supporting plates;

4-ring plates;

41-a first ring plate;

42-a second ring plate;

5-a cylinder;

51-opening;

6-lifting lugs;

7-ejector rods;

8-top plate;

9-thread plate;

10-nuts;

11-connecting plates;

12-arc plates;

13-a first connecting rod;

14-a first fixing plate;

15-a first clamping block;

16-a second connecting rod;

17-a second fixing plate;

18-a second clamping block;

19-callipers;

20-anti-vibration bar end caps.

Detailed Description

The invention is further described in detail below by means of the figures and examples. The features and advantages of the present invention will become more apparent from the description.

The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

The invention provides a steam generator tube bundle assembly assembling and positioning device, which comprises a connecting tube assembly and an anti-sagging device, wherein the connecting tube assembly is used for temporarily fixing a supporting plate during installation,

In the invention, the semi-exposed state in the assembly process of the steam generator tube bundle assembly is shown in fig. 1, and the steam generator tube bundle assembly comprises a tube plate 1, a semi-cylinder body 2 and a supporting plate 3 which are sequentially arranged. The connecting cylinder assembly in the steam generator tube bundle assembly assembling and positioning device is used for assisting in installing the supporting plate 3, the U-shaped tubes are assembled on the supporting plate, and the sagging preventing device is used for preventing the tube bundle assembly from sagging.

According to a preferred embodiment of the present invention, the connection cylinder assembly comprises a ring plate 4 and a cylinder 5, wherein the ring plate 4 comprises a first ring plate 41 and a second ring plate 42, which are respectively disposed at both ends of the cylinder 5, as shown in fig. 2 and 3.

In a further preferred embodiment, the first annular plate 41 is fixedly connected to the tube sheet 1.

Preferably, the connection is secured by a mechanical connection.

In a still further preferred embodiment, lifting lugs 6 are provided on both the first and second loop plates 41, 42 to effect turning of the tube bundle assembly.

Wherein, lug 6 and annular plate fixed connection, preferably welded connection.

Preferably, 1 lifting lug is provided on the first ring plate 41, and 2 lifting lugs are provided on the second ring plate 42.

In the invention, 1 lifting lug is arranged on the first annular plate, and 2 lifting lugs are arranged on the second annular plate for cooperation use, so that the tube plate is arranged downwards and the tube bundle is arranged upwards after the tube bundle is assembled.

According to a preferred embodiment of the invention, the inner diameter of the cylinder 5 is the same as the inner diameter of the ring plate 4,

the cylinder 5 is arranged outside the half cylinder 2 in a matching way.

In a further preferred embodiment, a notch 51 is provided in the cylinder 5 to allow viewing of the mounting position of the support plate.

Preferably, the plurality of the slits 51 is provided.

In the invention, a plurality of openings are formed around the cylinder body, so that the installation position of the supporting plate can be observed and adjusted conveniently, and interference with parts on the tube plate and the semi-cylinder body can be avoided.

The opening position of the notch is not particularly limited, and is preferably arranged between two adjacent support plates, so that the installation condition and adjustment of the support plates are conveniently observed, more preferably, four positions of the adjacent support plates are opened, and the operation and observation space provided by the opening positions can be contained in the circumferential direction of the support plates.

According to a preferred embodiment of the present invention, a support plate fixing device is further provided on the cylinder 5, and as shown in fig. 3 and 5, the support plate fixing device includes a support plate fixing assembly fixedly connected with the cylinder through a connection assembly and fixing the support plate.

In a further preferred embodiment, as shown in fig. 5 and 6, the support plate fixing assembly comprises a top rod 7 and a top plate 8,

the top plate 8 is arranged at one end of the ejector rod 7 so as to push the supporting plate.

Preferably, a screw structure is provided on the outside of the ejector pin 7 to fix the ejector pin to the cylinder 5, the ejector pin 7 and the top plate 8 being coaxially disposed.

Wherein, the ejector rod is preferably an ejector wire.

According to a preferred embodiment of the invention, the connection assembly comprises a threaded plate 9 and a nut 10,

a through hole is formed in the center of the threaded plate 9, so that the ejector rod 7 passes through.

Preferably, the screw plate 9 is fixedly connected, preferably welded, to the cylinder 5.

In a further preferred embodiment, through holes are formed in the barrel 5 at the connecting positions of the threaded plates and the barrel, and the ejector rod 7 passes through the through holes, so that the top plate 8 is arranged in the barrel;

preferably, the connection positions of the threaded plate 9 and the cylinder 5 are arranged at the corresponding positions of four quadrants of the support plate, and are preferably arranged along the directions of the transverse axis and the longitudinal axis of the rectangular coordinate system of the plane where the support plate is located, as shown in fig. 4.

According to the invention, according to the requirements of the placement azimuth of the product, the azimuth of 0 degrees and the azimuth of 180 degrees are vertical directions, and the installation azimuth of the supporting plate is consistent with the product, the inventor researches and discovers that the connection position of the threaded plate 9 and the cylinder 5 is arranged at the position, so that the azimuth adjustment and alignment of the supporting plate can be convenient.

In the invention, preferably, each supporting plate corresponds to four supporting plate fixing assemblies, in the installation process, after the supporting plate is installed to a designated position, the positions of the ejector rods at the four positions are adjusted, so that the top plate is tightly propped against the supporting plate, and then nuts and the threaded plates are adjusted, so that the position of the top plate is fixed.

According to a preferred embodiment of the invention, a connection plate 11 is provided at one end of the second ring plate 42, which has two, as shown in figures 3, 4 and 7,

preferably, the two connecting plates have the same structure and are symmetrically distributed, and the longitudinal axis of the rectangular coordinate system of the plane where the second ring plate is located is taken as a symmetry axis.

In a further preferred embodiment, the distance between the two connection plates is smaller than the inner diameter of the second ring plate.

In the invention, the two connecting plates are arranged at the two ends of the chord of the circular surface where the second annular plate is arranged, so that the installation of the anti-sagging device and the adjustment of the U-shaped pipe are facilitated.

In a further preferred embodiment, the connection plate 11 is fixedly connected, preferably welded, to the second ring plate 42.

In the invention, the temporary fixation of the supporting plate during installation can be realized through the connecting cylinder assembly, so as to ensure that the supporting plate can rotate on the roller frame during the manufacturing process.

According to a preferred embodiment of the present invention, the coupling barrel assembly further comprises an arc plate 12 to provide a sagging prevention means, as shown in fig. 8;

the arc plate 12 is connected with the cylinder 5 through a connecting plate 11.

In a further preferred embodiment, the arc plate 12 is detachably connected to the connection plate 11.

In a still further preferred embodiment, threaded holes are provided in the arc plate 12 for connection with anti-sagging means.

According to a preferred embodiment of the present invention, the sagging prevention means includes a middle connection member provided at a middle position of the arc plate and side connection members provided at both sides of the middle connection member as shown in fig. 2.

In the present invention, the middle connection member may have 1 or more, and the side connection members have a plurality.

In a further preferred embodiment, as shown in fig. 9 and 10, the middle connection assembly comprises a first connection rod 13 and a first fixing plate 14, wherein,

the first connecting rod 13 has a threaded structure, and the bottom end of the first connecting rod is connected with the arc plate 12 through threads.

Preferably, the first connecting rod 13 is a screw.

In the invention, the anti-sagging control of the U-shaped pipes with different rows can be performed by adjusting the height of the first connecting rod.

In a further preferred embodiment, the first fixing plate 14 is disposed at the top end of the first connecting rod 13, and the two are detachably connected, preferably by bolts and nuts.

According to a preferred embodiment of the invention, the intermediate connection assembly further comprises a first clamping block 15, which is arranged on the first fixing plate.

Preferably, the first clamping blocks 15 are provided in a plurality, preferably two, at the upper end and the lower end of the first fixing plate, respectively.

In a further preferred embodiment, the first clamping block 15 comprises a connecting end and a clamping end, the first clamping block is connected with the first fixing plate through the connecting end,

the clamping end is arc-shaped and is matched with the U-shaped pipe.

In the invention, the first clamping block is fixedly connected with the middle part of the U-shaped tube bundle so as to prevent the tube bundle from sagging.

In a further preferred embodiment, the first clamping block 15 is made of a non-metal material so as to be in direct contact with the U-shaped tube.

For example, the first clamping block may be made of nylon material.

According to a preferred embodiment of the present invention, the side connection assembly includes a second connection rod 16 and a second fixing plate 17, as shown in fig. 11 and 12,

the second connecting rod 16 has a threaded structure, and the bottom end of the second connecting rod is connected with the arc plate 12 through threads.

Preferably, the second connecting rod 16 is a screw.

In a further preferred embodiment, the second fixing plate 17 is disposed at the top end of the second connecting rod 16, and the two are detachably connected, preferably by bolts and nuts.

In a further preferred embodiment, a second clamping block 18, which has a plurality of,

preferably, the second clamping blocks 18 are provided at the upper end and the lower end of the second fixing plate, respectively.

More preferably, the second clamping block has the same structure and material as the first clamping block.

According to a preferred embodiment of the invention, the side connection assembly further comprises a caliper 19,

the caliper 19 is arranged on the second fixed plate.

In a further preferred embodiment, the caliper 19 is fixedly attached to an anti-vibration bar end cap 20 in the tube bundle, as shown in FIG. 13.

In the present invention, vibration-resistant strips are located between adjacent two tube bundles for supporting the tube bundles to clamp the tubes, preventing elastic vibration due to unstable flow of liquid, and at the same time limiting vibration due to turbulent flow of liquid, keeping the vibration at a level as low as possible, thereby reducing breakage of the tubes due to fatigue fretting and corrosion. In the manufacturing process, the end caps of the vibration-proof strips are welded with the retaining strips to fix the vibration-proof strips, and the vibration-proof strips in different layers are connected into a whole through welding.

According to a preferred embodiment of the invention, the middle connecting component is connected to the middle position of the U-shaped tube bundle, and the side connecting components are connected to the corresponding positions of the caps at the two ends of the vibration-resistant strip.

In the invention, the middle connecting component and the side connecting components are adopted, so that the U-shaped tube bundle can be supported and fixed at different positions in an anti-sagging way.

The assembly positioning device for the tube bundle assembly of the steam generator can realize the installation positioning and alignment of the support plate of the tube bundle assembly in the semi-exposed state, the sagging control of the tube bundle assembly, and the rotation and turning over of the tube bundle assembly in the manufacturing process, and can ensure the precision and quality of manufactured products.

The invention also provides a method for assembling and positioning the tube bundle assembly of the steam generator, which is preferably carried out by adopting the assembling and positioning device, and the method comprises the following steps:

step 1, pre-installing a supporting plate;

step 2, fixing the position of the supporting plate;

and 3, performing anti-sagging control on the U-shaped tube bundles.

The steam generator tube bundle assembly positioning method is described further below:

step 1, pre-installing a supporting plate.

Preferably, step 1 comprises the sub-steps of:

and step 1-1, fixedly connecting the connecting cylinder assembly with the tube plate and the half cylinder body.

In the invention, the connecting cylinder assembly, the tube plate and the half cylinder body are sleeved and fixed at first.

Step 1-2, temporarily fixing the supporting plate.

In the invention, the assembling position of the supporting plate is preferably drawn in advance on the cylinder 5 according to the actual installation requirement, and the installation position of the supporting plate is observed and adjusted through the notch in the installation process, and the interference with the parts on the tube plate and the semi-cylinder body is avoided.

After the installation position of the supporting plate is adjusted, the supporting plate is temporarily fixed by adopting a supporting plate fixing assembly, so that the supporting plate is prevented from lodging.

And 2, fixing the position of the supporting plate.

According to a preferred embodiment of the invention, before fixing the position of the support plate, an accurate adjustment of the mounting position is required,

the accurate adjustment comprises the adjustment support plate and the tube plate are coaxial, the adjustment support plate and the tube plate secondary side surface are parallel,

also included is adjusting quadrant centering of the plurality of support plates.

In a further preferred embodiment, a laser tracker is used to make precise adjustments to the mounting position of the support plate.

In the invention, after the supporting plates are installed in place, the product pull rods are used for fixing the supporting plates, after all the supporting plates are installed in place, the supporting plates are connected and fixed into a whole by the pull rods, and then the subsequent pipe penetrating process is carried out.

And 3, performing anti-sagging control on the U-shaped tube bundles.

Preferably, step 3 comprises the steps of:

step 3-1, when the U-shaped tube bundles are penetrated to a preset row number, fixedly connecting the middle connecting component and the side connecting components with the arc plates;

step 3-2, fixing the first clamping block and the second clamping block with the U-shaped pipe;

and 3-3, fixing the calipers on the side connecting assembly with caps at the two ends of each layer of vibration-resistant strip.

In step 3-1, the predetermined number of rows is set according to the sagging amount requirement of the specific product.

According to a preferred embodiment of the present invention, step 3-3 is followed by step 3-4 of adjusting the heights of the first connecting rod and the second connecting rod to adjust the interval between the U-shaped tube bundles and control the sagging amount.

According to the invention, the assembled steam generator tube bundle assembly and the assembling and positioning device can be placed on the roller frame, so that rotation can be realized, meanwhile, lifting and turning of the tube bundle assembly can be realized by utilizing the lifting lug on the connecting cylinder assembly, and the rotating precision of the supporting plate and the tube bundle can not be influenced in the whole process.

Examples

The invention is further described below by means of specific examples, which are however only exemplary and do not constitute any limitation on the scope of protection of the invention.

Example 1

The steam generator tube bundle assembly assembling and positioning device has the following specific structure:

the connecting cylinder assembly comprises a ring plate and a cylinder body, wherein the ring plate comprises a first ring plate and a second ring plate, the first ring plate is fixedly connected with the tube plate, 1 lifting lug is welded on the first ring plate, and 2 lifting lugs are welded on the second ring plate;

12 openings are formed in the cylinder body, and the opening rule is that 4 openings are formed between every two supporting plates;

the supporting plate fixing assembly comprises a push rod, a top plate, a threaded plate and a nut, wherein the threaded plate is welded on the cylinder body and is arranged in four directions along the transverse axis and the longitudinal axis of a rectangular plane coordinate system where the supporting plate is positioned;

the anti-sagging device comprises 2 middle connecting components and 4 side connecting components, wherein the middle connecting components consist of a screw rod, a fixing plate and two clamping blocks, the side connecting components consist of the screw rod, the fixing plate, two clamping blocks and a caliper, the clamping blocks are made of nylon materials, and the caliper is fixedly connected with an end cap of an anti-vibration strip in the tube bundle.

Example 2

This example uses the apparatus of example 1 to perform the assembly manufacturing of a steam generator tube bundle assembly in a semi-exposed state during the assembly process, according to the following steps:

step 1: firstly, sleeving and fixing the connecting cylinder assembly, the tube plate and the semi-cylinder body, marking the assembly position of the supporting plate on the cylinder body in advance according to the actual installation requirement, observing and adjusting the installation position of the supporting plate through the notch in the installation process, and avoiding interference with parts on the tube plate and the semi-cylinder body;

after the installation position of the supporting plate is adjusted, the supporting plate is temporarily fixed by adopting a supporting plate fixing assembly.

Step 2: the upper supporting plate is adjusted by adjusting jackscrews, and the supporting plate is coaxial with the tube plate by adopting the assistance of a laser tracker, is parallel to the surface of the secondary side of the tube plate and is in quadrant centering; the support plate is fixed by means of a product pull rod after being installed in place.

And 3, after the U-shaped tube bundles penetrate through a preset row number, fixing the side connecting assemblies and the middle connecting assembly on the arc plate, fixing the clamping blocks with the U-shaped tubes, fixing the calipers with caps at two ends of each layer of vibration-proof strip, and adjusting the height of the adjustable screw.

According to the process requirement, the product and the assembly positioning device are placed on the roller frame, so that the rotation can be realized, and the lifting lug on the connecting cylinder assembly can be utilized to realize lifting and turning.

Experimental example

Experimental example 1

The steam generator tube bundle assembly assembled in the embodiment 2 is detected by adopting an optical alignment method, and the assembled product is shown to meet the requirements of product technical documents and drawings, so that the use of the device provided by the invention is shown to meet the manufacturing precision and quality of the product.

In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the azimuth or positional relationship in the operation state of the present invention, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected in common; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The invention has been described above in connection with preferred embodiments, which are, however, exemplary only and for illustrative purposes. On this basis, the invention can be subjected to various substitutions and improvements, and all fall within the protection scope of the invention.

Claims

1. A steam generator tube bundle assembly positioning device is characterized in that the device comprises a connecting cylinder assembly and a sagging prevention device, wherein,

the anti-sagging device is arranged on the connecting cylinder assembly to carry out anti-sagging support and fixation on the U-shaped tube bundles;

the connecting cylinder assembly comprises a ring plate (4) and a cylinder body (5), wherein the ring plate (4) comprises a first ring plate (41) and a second ring plate (42) which are respectively arranged at two ends of the cylinder body (5);

the connecting cylinder assembly also comprises an arc plate (12) for providing a sagging prevention device,

the arc plate (12) is connected with the cylinder (5) through a connecting plate (11);

the sagging prevention device comprises a middle connecting component and a side connecting component,

the middle connecting assembly comprises a first connecting rod (13), a first fixing plate (14) and a first clamping block (15), and the first clamping block (15) is provided with a plurality of clamping blocks; the bottom end of the first connecting rod is connected with the arc plate (12) through threads, the first fixing plate (14) is arranged at the top end of the first connecting rod (13), the first clamping blocks (15) are arranged at the upper end and the lower end of the first fixing plate, and the first clamping blocks are fixedly connected with the middle part of the U-shaped pipe bundle;

the side connecting component comprises a second connecting rod (16), a second fixing plate (17) and a second clamping block (18),

the bottom end of the second connecting rod (16) is connected with the arc plate (12) through threads, the second fixing plate (17) is arranged at the top end of the second connecting rod (16), the second clamping blocks (18) are arranged at the upper end and the lower end of the second fixing plate,

and a caliper (19) is further arranged on the second fixing plate, the caliper (19) is fixedly connected with an end cap (20) of an anti-vibration strip in the tube bundle, and the anti-vibration strip is positioned between two adjacent tube bundles.

2. The steam generator tube bundle assembly fitting positioning device according to claim 1, wherein a notch (51) is provided in the cylinder (5) to observe the mounting position of the support plate,

the number of the notches (51) is plural.

3. The steam generator tube bundle assembly positioning device according to claim 1, characterized in that a support plate fixing device is further provided on the cylinder (5), the support plate fixing device comprises a support plate fixing assembly and a connecting assembly, and the support plate fixing assembly is fixedly connected with the cylinder through the connecting assembly and fixes the support plate.

4. A steam generator tube bundle assembly fitting positioning device according to claim 3, wherein the support plate fixing assembly comprises a top rod (7) and a top plate (8),

the top plate (8) is arranged at one end of the ejector rod (7) so as to push the supporting plate.

5. A method of assembling and positioning a steam generator tube bundle assembly using the apparatus of any one of claims 1 to 4, the method comprising the steps of:

step 1, pre-installing a supporting plate;

step 2, fixing the position of the supporting plate;

and 3, performing anti-sagging control on the U-shaped tube bundles.

6. The steam generator tube bundle assembly fitting positioning method of claim 5, wherein step 1 includes the sub-steps of:

step 1-1, fixedly connecting a connecting cylinder assembly with a tube plate and a semi-cylinder body;

step 1-2, temporarily fixing the supporting plate.