High-temperature gas cooled reactor bearing cylinder outer side thermal insulation filler filling auxiliary device and filling method

Abstract

The invention discloses a high-temperature gas cooled reactor bearing cylinder outer side thermal insulation filler filling auxiliary device and a filling method, the auxiliary device comprises a cylinder body with the outer diameter consistent with the outer diameter of a lower bearing cylinder, a jacket is fixedly mounted on the outer side of the cylinder body to form conical ring cavities, the upper conical ring cavity is filled with thermal insulation filler, and the lower conical ring cavity is filled with thermal insulation filler. After filling is completed, the auxiliary device is turned over and is in butt joint with an inverted lower bearing cylinder, the jacket with the heat preservation filler is transferred to the lower bearing cylinder, welding and fixing can be conducted after the position is adjusted to be proper, on the basis, the other conical annular cavity of the jacket is filled with the heat preservation filler, and then mounting of one jacket is completed; and the operation is repeated, so that the mounting and sealing work of a plurality of jackets can be completed in sequence.

Description

Technical Field

[0001] The present invention relates to the field of pressure vessels, and in particular to an auxiliary device and a filling method for a thermal insulation filler filling the outer side of a high-temperature gas-cooled reactor load-bearing tube. Background Art

[0002] The high temperature gas-cooled reactor nuclear power plant adopts a new generation of nuclear power generation technology independently designed by my country with completely independent intellectual property rights. It has the advantages of good inherent safety, high power generation efficiency, small capacity, and modular construction. The steam generator is one of the key equipment of the nuclear power plant, and its heat exchange internals are the core of the steam generator. The heat exchange internals are placed in the load-bearing cylinder assembly inside the shell.

[0003] The load-bearing cylinder assembly is divided into an upper load-bearing cylinder 61 and a lower load-bearing cylinder 62. Figure 5 As shown in , the internal operating temperature of the equipment is relatively high when it is in operation, and a heat-insulating structural layer is installed on the outer side of the lower load-bearing tube 62 .

[0004] The insulation structure includes a multi-section jacket 63 sleeved on the outside of the lower bearing tube, and the interior is filled with a high-density insulation filler 71 for insulation. The jacket 63 is designed to be sealed with a multi-section socket structure, and each section of the jacket 63 is welded by a thin-walled straight tube 631, a tapered tube 632 and a socket ring 633.

[0005] After each section of the jacket 63 is assembled with the lower load-bearing cylinder 62, the conical cylinder 632 and its outer wall form conical annular cavities on the upper and lower sides. The jacket 63 is assembled on the lower load-bearing cylinder 62 section by section and filled with thermal insulation filler 71. The conical cylinder 632 and the lower load-bearing cylinder 62 are welded to seal the thermal insulation filler 71 on one side in the jacket 63; the socket ring 633 is inserted into the straight cylinder 631 between each section to achieve the sealing of the thermal insulation filler 71 on the other side.

[0006] The thermal insulation filler 71 is a thermal insulation blanket made of asbestos, and its density under normal conditions is 110 kg / m 3 The design requires that the filling density of thermal insulation filler 71 be between 165-200kg / m 3 And when filling, the density must be uniform and there must be no gaps, so the thermal insulation filler needs to be compressed and filled.

[0007] The outer diameter of the lower load-bearing tube 62 is 3.2 meters, the inner diameter of the jacket straight tube 631 is 3.4 meters, and the height of each section of the jacket 63 is 1 meter. Structurally, the conical annular cavity is narrow and deep, and there is a risk of partial incomplete filling or inability to fill the sharp corners formed at the top of the conical annular cavity; and it is difficult to apply compression force to the lower conical annular cavity during the filling process of the thermal insulation filler, and it is difficult to meet the density requirements.

[0008] In addition, the jacket 63 is inserted along the outer wall of the lower load-bearing tube 62 until it contacts the upper load-bearing tube 61. During the movement of the jacket, there is a large friction resistance between the thermal insulation filler 71 and the outer wall of the lower load-bearing tube 62, and there is a risk of falling off or uneven density, resulting in failure to meet the designed filling requirements.

[0009] In summary, the installation of the outer jacket 63 of the load-bearing tube and the high-density filling of the thermal insulation filler 71 are both quite difficult, and it is urgent to design an auxiliary installation and filling device and a corresponding installation and filling method. Summary of the invention

[0010] In order to overcome the above problems, the inventors have conducted intensive research and designed an auxiliary device and filling method for filling thermal insulation filler on the outside of the bearing tube of a high-temperature gas-cooled reactor. The auxiliary device includes a cylinder whose outer diameter is consistent with the outer diameter of the lower bearing tube. A jacket is fixedly installed on the outside of the cylinder to form a conical annular cavity. The thermal insulation filler is filled in the upper conical annular cavity. After the filling is completed, the auxiliary device is turned over and docked with the inverted lower bearing tube. The jacket with the thermal insulation filler is transferred to the lower bearing tube. After the position is adjusted to a suitable position, it can be welded and fixed. On this basis, the thermal insulation filler is filled in another conical annular cavity of the jacket to complete the installation of one jacket. Repeating the above operations can complete the installation and sealing of multiple jackets in sequence, thereby completing the present invention.

[0011] Specifically, the purpose of the present invention is to provide an auxiliary device for filling thermal insulation fillers on the outer side of a high-temperature gas-cooled reactor bearing tube, wherein the bearing tube comprises an upper bearing tube 61 and a lower bearing tube 62, and a multi-section jacket 63 is mounted on the outer side of the lower bearing tube 62.

[0012] The jacket 63 includes a thin-walled straight tube 631, a tapered tube 632 is arranged inside the thin-walled straight tube 631, and a socket ring 633 is arranged at the end of the thin-walled straight tube 631. The outer diameter of the socket ring 633 is substantially equal to the inner diameter of the thin-walled straight tube 631.

[0013] Each section of the jacket 63 and the lower bearing cylinder 62 is separated into two upper and lower conical annular cavities by a conical cylinder 632, and the conical annular cavity is filled with a high-density heat-insulating filler 71;

[0014] 3-4 temporary lifting ears 634 are welded on the outer wall of the thin-walled straight tube 631 for temporary lifting, and the temporary lifting ears 634 are removed after the jacket 63 is installed in place;

[0015] The filling auxiliary device comprises an auxiliary sleeve 1, a flip hanger 2, a stop rod 3, a stop cover 4 and a support bolt 5;

[0016] The auxiliary sleeve 1 comprises a cylinder body 11 having an outer diameter consistent with the outer diameter of the lower bearing cylinder 62.

[0017] On the cylinder 11, a plurality of support bolt extension holes 111 are evenly opened along the circumferential direction, and the support bolts 5 can extend from the inside of the cylinder 11 to the outside of the cylinder 11 through the support bolt extension holes 111, so as to support the cone 632 of the jacket 63;

[0018] On the cylinder 11, multiple rows of blocking rod extension holes 112 are evenly arranged along the circumferential direction, and the blocking rod 3 can extend from the inside of the cylinder 11 to the outside of the cylinder 11 through the blocking rod extension holes 112, so that the conical annular cavity is divided into multiple sub-cavities by the blocking rod 3;

[0019] One or two groups of heat preservation units 7 can be accommodated in each of the sub-cavities;

[0020] The blocking cover 4 is detachably fixedly mounted on the top of the conical annular cavity filled with the thermal insulation filler 71 to limit the sealing of the thermal insulation filler 71 in the vertical direction.

[0021] The auxiliary sleeve 1 further comprises a support ring 12 fixedly mounted on the inner side of the cylinder 11 , and the outer diameter of the support ring 12 is consistent with the inner diameter of the cylinder 11 .

[0022] The support ring 12 is provided with a screw hole block 13 and a lug plate 15.

[0023] The screw hole block 13 is provided with a threaded hole, which is coaxial with and connected to the support bolt extension hole 111 to increase the installation strength of the support bolt 5;

[0024] The top end of the ear plate 15 extends out from the cylinder body 11, and two ear plate connecting holes are provided at the top end of the ear plate 15; a guiding inclined surface is also provided on the ear plate 15 for coaxial positioning when the auxiliary sleeve 1 is docked with the lower bearing cylinder 62.

[0025] A guide tube 14 is further provided inside the cylinder 11 . The guide tube 14 is coaxial with and connected to the blocking rod extension hole 112 . Each blocking rod extension hole 112 corresponds to a guide tube 14 . The blocking rod 3 is fixed and limited by the guide tube 14 .

[0026] The flip hoist 2 is rod-shaped as a whole, one end of which is provided with two connection holes 21 for connecting with the lifting lug plate 15, and the other end of which is provided with a flip lifting hole 22 and a jacket lifting hole 23.

[0027] The blocking cover 4 includes an arc-shaped blocking plate 41, a supporting plate 42 and a top screw 43.

[0028] The baffle cover 4 is fixed to the end of the thin-walled straight tube 63 by clamping the end of the thin-walled straight tube 63 through the support plate 42 and the top screw 43, so that the fan-shaped baffle plate 41 can seal the thermal insulation filler 71 in the lower load-bearing tube 62 and the conical tube 632, and prevent the thermal insulation filler 71 from falling off from the conical tube 632 when the jacket 63 is flipped over with the auxiliary sleeve 1.

[0029] The heat preservation unit 7 is prepared by the following method:

[0030] Step a, cutting the profile of the heat-insulating filler 71 to be consistent with the cross-sectional shape of the conical ring cavity,

[0031] Step b, after the multiple layers of heat-insulating fillers 71 are stacked, pressing plates 72 are added on both sides and pressed, and after being pressed to a predetermined density, they are tied with a binding belt 73 to obtain the heat-insulating unit 7;

[0032] The thermal insulation filler 71 is a thick thermal insulation blanket made of asbestos;

[0033] The contour shape of the pressing plate 72 is consistent with the contour shape of the thermal insulation filler 71 after cutting.

[0034] The predetermined density value is greater than the density value required in the conical annular cavity.

[0035] The present invention also provides a method for filling thermal insulation filler on the outer side of a high-temperature gas-cooled reactor load-bearing tube, and the method is implemented by the above-mentioned auxiliary device for filling thermal insulation filler on the outer side of a high-temperature gas-cooled reactor load-bearing tube.

[0036] The method comprises the following steps:

[0037] Step 1: Place the auxiliary sleeve 1 steadily on the ground, unscrew the support bolts 5, lift the jacket 63, make the small end of the cone 632 face downward, and insert it into the outside of the auxiliary sleeve 1, gradually move downward, and finally make the cone 632 abut against the support bolts 5 extending out of the cylinder body 11, the jacket 63 is in a stable state, and the cone 632 and the outer wall of the auxiliary sleeve 1 form a conical annular cavity;

[0038] Step 2: insert the blocking rod 3 along the guide tube 14, and make the blocking rod 3 abut against the inner wall of the conical cylinder 632 or the thin-walled straight cylinder 631, so that the conical annular cavity is divided into a plurality of sub-cavities of equal size by a plurality of rows of blocking rods 3, and two groups of heat preservation units 7 are installed in each sub-cavity, and after the heat preservation units 7 are installed in place, the pressing plates 72 and the strapping belts 73 thereon are removed;

[0039] Step 3: After the heat-insulating filler 71 expands and fills the sub-cavity, all the blocking rods 3 are pulled out, and the blocking cover 4 is installed at the end of the thin-walled straight tube 631 of the jacket 63, so that the arc-shaped baffle plate 41 presses the upper end surface of the heat-insulating filler, and the blocking cover 4 is fixed to the jacket 63 through the support plate 42 and the top screw 43;

[0040] Step 4: Install the flip hanger 2 on the lifting lug plate 15 of the auxiliary sleeve 1, connect the jacket lifting hole 23 on the flip hanger 2 with the temporary lifting lug 634 of the jacket with an electric guide chain 8, and tighten the electric guide chain 8 so that the cone 632 on the jacket 63 is continuously against the support bolt 5; flip the auxiliary sleeve 1 180° using the flip lifting hole 22, and after flipping, the thermal insulation filler 71 is located in the lower conical ring cavity and is supported and fixed in the conical ring cavity by the blocking cover 4;

[0041] Step 5: Lift the auxiliary sleeve 1, remove the lower side flip hanger 2 and place the auxiliary sleeve 1 on the upper end of the lower bearing tube 62, slowly adjust and extend the electric guide chain 8, so that the jacket 63 slowly moves down along the auxiliary sleeve 1 and the outer wall of the lower bearing tube 62; when the distance between the jacket 63 and the upper bearing tube 61 reaches 0.2 meters, remove the blocking cover 4, and continue to slowly drop the jacket 63 until it fits with the upper bearing tube 61;

[0042] Step 6: Adjust the installation position of the jacket 63, weld the conical cylinder 632 and the lower bearing cylinder 62, so as to seal the thermal insulation filler 71; after the welding is completed, fill the thermal insulation filler 71 in the conical annular cavity on the upper side of the jacket 63, and remove the auxiliary sleeve 1 at the same time;

[0043] Step 7: Repeat steps 1 to 6 to perform subsequent installation and fitting of the jacket 63 and filling of the thermal insulation filler 71;

[0044] Among them, when the rear section jacket 63 falls to the docking position with the previous section 63, the position of the rear section jacket 63 is adjusted circumferentially so that the socket ring 633 of the previous section jacket is inserted into the straight tube 631 of the rear section jacket to seal the thermal insulation filler 71; then the rear section jacket is pulled down to further compress the thermal insulation filler inside the previous section jacket.

[0045] The beneficial effects of the present invention include:

[0046] (1) According to the auxiliary device and filling method for the outer side of the high-temperature gas-cooled reactor bearing tube provided by the present invention, the auxiliary device provides an efficient and high-quality method for filling the thermal insulation filler, which can simulate the lower bearing tube, fill the thermal insulation filler in advance and turn it over, and transfer the thermal insulation filler filled on the upper side to the lower side, thereby avoiding the thermal insulation filler from being compressed and filled from the lower side, thereby improving the filling quality;

[0047] (2) According to the auxiliary device and method for filling the thermal insulation filler on the outer side of the bearing tube of a high-temperature gas-cooled reactor provided by the present invention, the auxiliary device is provided with a flip hoist, which can smoothly flip the auxiliary sleeve 180° after the jacket is installed, ensuring that the jacket does not contact the rope, preventing the rope from scratching and damaging the jacket; at the same time, an electric guide chain connected to the lifting hole of the jacket is used to smoothly and efficiently deliver each section of the jacket to the installation position on the outer side of the bearing tube;

[0048] (3) According to the auxiliary device and filling method for the thermal insulation filler outside the load-bearing tube of a high-temperature gas-cooled reactor provided by the present invention, the blocking rod in the auxiliary device cooperates with the auxiliary sleeve to divide the conical annular cavity to be filled into a plurality of uniform sub-cavities, thereby realizing the independent filling of each sub-cavity, ensuring the filling effect and density requirements, greatly reducing the filling difficulty of high-density thermal insulation filler, and being able to accurately calculate the filling density;

[0049] (4) According to the auxiliary device and method for filling the thermal insulation filler on the outer side of the load-bearing tube of a high-temperature gas-cooled reactor provided by the present invention, the baffle in the auxiliary device can effectively fix the thermal insulation filler in the conical annular cavity to prevent the thermal insulation filler from falling off during the turning and fitting of the jacket;

[0050] (5) According to the present invention, the auxiliary device and method for filling the thermal insulation filler on the outer side of the load-bearing tube of a high-temperature gas-cooled reactor provide a method for making and compressing the thermal insulation unit, which can reduce the difficulty of filling the thermal insulation filler and improve the filling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A schematic diagram showing the structure of an auxiliary device for filling thermal insulation fillers on the outer side of a high-temperature gas-cooled reactor bearing cylinder provided by the present application;

[0052] Figure 2 The three-dimensional structure and partial cross-sectional schematic diagram of the auxiliary sleeve on the auxiliary device for filling the thermal insulation filler on the outer side of the high-temperature gas-cooled reactor bearing tube provided by the present application are shown;

[0053] Figure 3 A schematic diagram showing the structure of the upper flip hanger of the auxiliary device for filling the thermal insulation filler on the outer side of the high-temperature gas-cooled reactor bearing tube provided by the present application;

[0054] Figure 4a A schematic diagram of the upper retaining cover structure of the auxiliary device for filling the thermal insulation filler on the outer side of the load-bearing cylinder of a high-temperature gas-cooled reactor provided by the present application is shown;

[0055] Figure 4b Show Figure 4a Schematic diagram of the cross-section at AA in the middle;

[0056] Figure 5 The overall structural diagram of the load-bearing cylinder is shown;

[0057] Figure 6 A schematic diagram of the structure of the jacket on the load-bearing cylinder is shown;

[0058] Figure 7 A schematic diagram of the structure of the insulation unit of the auxiliary device and the filling method for the outer side insulation filler of the load-bearing cylinder of a high-temperature gas-cooled reactor provided by the present application is shown;

[0059] Figure 8A schematic diagram showing step 1 of the method for filling the outer side of the load-bearing cylinder of a high-temperature gas-cooled reactor provided by the present application, i.e., installing the jacket;

[0060] Fig. 9 A schematic diagram showing step 2 of the method for filling the outer side of the load-bearing cylinder of a high-temperature gas-cooled reactor provided by the present application, i.e., installing the heat preservation unit;

[0061] Fig.10 The schematic diagram shows the structure after the cover is installed, i.e., step three of the method for filling the outer side of the load-bearing cylinder of a high-temperature gas-cooled reactor provided by the present application with thermal insulation filler;

[0062] Fig.11 A schematic diagram showing step 4 of the method for filling the outer side of the load-bearing cylinder of a high-temperature gas-cooled reactor provided by the present application, i.e., after the auxiliary sleeve is turned 180°;

[0063] Fig.12 A schematic diagram showing step five of the method for filling the outer side of the high temperature gas-cooled reactor bearing tube with thermal insulation filler provided in the present application, i.e., when the jacket is moved down to the outer side of the lower bearing tube;

[0064] Fig.13 A schematic diagram showing step six of the method for filling the outer side of the high temperature gas-cooled reactor bearing tube with thermal insulation filler provided by the present application, i.e., welding the conical tube and the lower bearing tube;

[0065] Fig.14 A schematic diagram showing step seven of the method for filling the outer side of the high-temperature gas-cooled reactor load-bearing tube with thermal insulation filler provided in the present application, i.e., the installation of the next section of the jacket.

[0066] Description of Reference Numerals

[0067] 1-Auxiliary sleeve

[0068] 11-Cylinder

[0069] 111-Support bolt extension hole

[0070] 112-Block rod extension hole

[0071] 12-Support ring

[0072] 13-Screw hole block

[0073] 14-Guide tube

[0074] 15-Eye plate

[0075] 2-Flip spreader

[0076] 21-Connection hole

[0077] 22-Flip lifting hole

[0078] 23- Jacket lifting hole

[0079] 3-Block

[0080] 4-Block cover

[0081] 41-Curved baffle

[0082] 42-Support plate

[0083] 43-Top Screw

[0084] 5-Support bolts

[0085] 61-Upper bearing cylinder

[0086] 62-Lower bearing cylinder

[0087] 63-Jack

[0088] 631-Thin-wall straight tube

[0089] 632-cone

[0090] 633-Socket Ring

[0091] 634-Temporary lifting lug

[0092] 7-Insulation unit

[0093] 71-Insulation filler

[0094] 72-Compression plate

[0095] 73-Strap

[0096] 8-Electric chain guide DETAILED DESCRIPTION

[0097] The present invention will be further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present invention will become more clear and distinct.

[0098] The word "exemplary" is used exclusively 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 shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0099] The present invention provides a filling auxiliary device for the outer side of the bearing tube of a high temperature gas-cooled reactor with thermal insulation filler, such as Figure 5 and Figure 6 As shown in , the load-bearing cylinder includes an upper load-bearing cylinder 61 and a lower load-bearing cylinder 62, and a multi-section jacket 63 is mounted on the outer side of the lower load-bearing cylinder 62.

[0100] The jacket 63 includes a thin-walled straight tube 631, a tapered tube 632 is arranged inside the thin-walled straight tube 631, and a socket ring 633 is arranged at the end of the thin-walled straight tube 631. The outer diameter of the socket ring 633 is substantially equal to the inner diameter of the thin-walled straight tube 631.

[0101] Each section of the jacket 63 and the lower bearing tube 62 is divided into two upper and lower conical annular cavities by a conical tube 632, and the conical annular cavity is filled with a high-density thermal insulation filler 71; the jacket 63 is inserted into the installation position section by section along the lower end of the lower bearing tube 62 and is annularly welded and sealed with the bearing tube; the socket ring 633 is inserted into the inner side of the straight tube 631 between each section of the jacket 63 to achieve the sealing of the thermal insulation filler 71.

[0102] 3-4 temporary lifting ears 634 are welded on the outer wall of the thin-walled straight tube 631 for temporary lifting, and the temporary lifting ears 634 are removed after the jacket 63 is installed in place;

[0103] Preferably, if Figure 1 , Figure 2 , Figure 3 As shown in FIG4 , the filling auxiliary device includes an auxiliary sleeve 1, a flip hanger 2, a stop rod 3, a stop cover 4 and a support bolt 5;

[0104] The auxiliary sleeve 1 includes a cylinder 11 whose outer diameter is consistent with the outer diameter of the lower bearing cylinder 62. On the cylinder 11, a plurality of support bolt extension holes 111 are evenly opened along the circumferential direction. The support bolts 5 can extend from the inside of the cylinder 11 to the outside of the cylinder 11 through the support bolt extension holes 111, thereby supporting the cone 632 of the jacket 63.

[0105] On the cylinder 11, multiple rows of blocking rod extension holes 112 are evenly opened along the circumferential direction, and each row of blocking rod extension holes 112 includes multiple blocking rod extension holes 112 that are evenly distributed, and the spacing between each other in the vertical direction is consistent; the blocking rod 3 can extend from the inside of the cylinder 11 to the outside of the cylinder 11 through the blocking rod extension holes 112, so that the conical annular cavity is divided into multiple sub-cavities by the blocking rod 3;

[0106] Each of the sub-cavities can accommodate one or two groups of heat preservation units 7; the specific number is determined by the size of the sub-cavity and the size of the heat preservation unit.

[0107] The blocking cover 4 is detachably fixedly mounted on the top of the conical annular cavity filled with the thermal insulation filler 71 to limit the sealing of the thermal insulation filler 71 in the vertical direction.

[0108] In a preferred embodiment, the auxiliary sleeve 1 further comprises a support ring 12 fixedly mounted on the inner side of the cylinder 11, and the outer diameter of the support ring 12 is consistent with the inner diameter of the cylinder 11. The support ring 12 is arranged at both ends of the cylinder to increase the roundness and rigidity of the cylinder, and prevent the cylinder from being deformed during the lifting and turning process, which affects the subsequent downward movement of the jacket along the outer wall of the sleeve and the load-bearing cylinder.

[0109] In a preferred embodiment, a screw hole block 13 and a lug plate 15 are provided on the support ring 12.

[0110] The screw hole block 13 is provided with a threaded hole, which is coaxial with and connected to the support bolt extension hole 111 to increase the installation strength of the support bolt 5;

[0111] The top end of the ear plate 15 extends out from the cylinder body 11, and two ear plate connecting holes are provided at the top end of the ear plate 15; a guiding inclined surface is also provided on the ear plate 15 for coaxial positioning when the auxiliary sleeve 1 is docked with the lower bearing cylinder 62.

[0112] In a preferred embodiment, a guide tube 14 is further provided inside the cylinder 11, and the guide tube 14 is coaxial with and connected to the blocking rod extension hole 112, and each blocking rod extension hole 112 corresponds to a guide tube 14; the blocking rod 3 is fixedly limited and supported by the guide tube 14 to prevent the blocking rod 3 from being distorted or deflected in its pointing direction.

[0113] In a preferred embodiment, the flip sling 2 is in the shape of a rod, one end of which is provided with two connection holes 21 for connecting with the lug plate 15, and the other end is provided with a flip lifting hole 22 and a jacket lifting hole 23. When the flip sling is connected to the auxiliary sleeve 1 equipped with the jacket 63, the position of the flip lifting hole 22 can always keep the lifting rope from contacting the jacket 63 during the flipping process, thereby preventing the rope from scratching and damaging it.

[0114] In the present application, preferably, the auxiliary sleeve 1 is symmetrical up and down, that is, the support ring 12, the screw hole block 13 and the support bolt 5 are provided in two groups, which are symmetrical to each other, so that the jacket can still be used and installed after the auxiliary sleeve is flipped 180 degrees; due to the difficulty and risk of flipping the auxiliary sleeve 1, the above-mentioned symmetrical design can effectively reduce the number of flippings of the auxiliary sleeve, and can directly continue to meet the use requirements of the next section of the jacket after the sleeve is flipped.

[0115] In a preferred embodiment, the blocking cover 4 includes an arc-shaped blocking plate 41, a supporting plate 42 and a top screw 43.

[0116] The baffle cover 4 is fixed to the end of the thin-walled straight tube 631 by clamping the end of the thin-walled straight tube 631 together through the support plate 42 and the top screw 43, so that the fan-shaped baffle plate 41 can seal the thermal insulation filler 71 in the lower load-bearing tube 62 and the conical tube 632, and prevent the thermal insulation filler 71 from falling off from the conical tube 632 when the jacket 63 is flipped over with the auxiliary sleeve 1.

[0117] In a preferred embodiment, Figure 7 As shown in , the heat preservation unit 7 is prepared by the following method:

[0118] Step a, cutting the profile of the heat-insulating filler 71 to be consistent with the cross-sectional shape of the conical ring cavity,

[0119] Step b, after the multiple layers of heat-insulating fillers 71 are stacked, pressing plates 72 are added on both sides and pressed, and after being pressed to a predetermined density, they are tied with a binding belt 73 to obtain the heat-insulating unit 7;

[0120] The thermal insulation filler 71 is a thick thermal insulation blanket made of asbestos;

[0121] The contour shape of the pressing plate 72 is consistent with the contour shape of the thermal insulation filler 71 after cutting.

[0122] The predetermined density value is greater than the density value required in the conical annular cavity.

[0123] When compressing the insulation unit, the compression density will be greater than the filling density requirement. The purpose is to leave a certain amount of space for removing the co-compression plate and the strapping tape when the insulation unit 7 is installed in the sub-cavity. When the strapping tape 73 is removed, the insulation filler 71 in each group of insulation units slowly expands outward to fill the conical annular cavity space and still meets the filling density.

[0124] Preferably, in step b, the compression plate 72 is compressed by means of a compression device so that the density of the thermal insulation filler 71 is increased from 110 kg / m 3 Compressed to about 200kg / m 3 , the thickness is compressed to about 0.6 times of the original thickness.

[0125] The present invention also provides a method for filling the outer side of the bearing tube of a high temperature gas-cooled reactor with thermal insulation filler, such as Figures 8 to 14 As shown in , the method is implemented by the above-mentioned auxiliary device for filling the outer side of the high-temperature gas-cooled reactor bearing tube with thermal insulation filler.

[0126] Preferably, the method comprises the following steps:

[0127] Step 1: Place the auxiliary sleeve 1 steadily on the ground, unscrew the support bolts 5, preferably unscrew the support bolts 5 located at the bottom; lift the jacket 63 so that the small end of the cone 632 faces downward, and insert it into the outside of the auxiliary sleeve 1, gradually move downward, and finally make the cone 632 abut against the support bolts 5 extending out of the cylinder body 11, the jacket 63 is in a stable state, and the cone 632 and the outer wall of the auxiliary sleeve 1 form a conical annular cavity;

[0128] Step 2: Insert the blocking rod 3 along the guide tube 14, and make the blocking rod 3 abut against the inner wall of the conical cylinder 632 or the thin-walled straight cylinder 631, so that the conical annular cavity is divided into multiple sub-cavities of equal size by multiple rows of blocking rods 3, and two groups of insulation units 7 are installed in each sub-cavity, and the clamping plate 72 and the strapping belt 73 thereon are removed after the insulation unit 7 is installed in place; the purpose is to facilitate the removal of the clamping plate 72 and the strapping belt 73.

[0129] In this application, the insulation unit 7 is made with a width of 0.4 meters, and the sub-cavity is divided into twelve parts. The circumferential distance of the sub-cavity is 0.9 meters, which can meet the space for the installation of two groups of insulation units 7 and the removal of the pressing plate 72 and the strapping belt 73. After the expansion of the insulation filler, the density can reach 178kg / m 3 , meeting the filling requirements.

[0130] Step 3: After the heat-insulating filler 71 expands and fills the sub-cavity, all the blocking rods 3 are pulled out. At this time, the heat-insulating filler 71 expands in the cavity and fills the cavity circumferentially. Since its compression direction is circumferential, it will not expand in the axial direction of the auxiliary sleeve 1. Install the blocking cover 4 at the straight end of the jacket 63, so that the arc-shaped baffle plate 41 presses the upper end surface of the heat-insulating filler, and fix the blocking cover 4 on the jacket 63 through the support plate 42 and the top screw 43;

[0131] Step 4: Install the flip hanger 2 on the ear plate 15 of the auxiliary sleeve 1. The flip hanger 2 can also be installed in step 1. Connect the jacket lifting hole 23 on the flip hanger 2 with the temporary lifting ear 634 of the jacket with an electric guide chain 8, and tighten the electric guide chain 8 so that the cone 632 on the jacket 63 is constantly against the support bolt 5. The electric guide chain 8 is a common tool, and the selected specifications should meet the moving stroke of the jacket 63. Use the flip lifting hole 22 to flip the auxiliary sleeve 1 180°. After flipping, the thermal insulation filler 71 is located in the lower conical ring cavity and is supported and fixed in the conical ring cavity by the cover 4.

[0132] Step five: Lift the auxiliary sleeve 1, remove the lower flip hanger 2 and place the auxiliary sleeve 1 on the upper end of the lower bearing tube 62. At this time, the auxiliary sleeve 1 is guided by the lifting lug plate 15 and can maintain good coaxiality with the lower bearing tube 62. Before performing this operation, place the bearing tube assembly 6 upside down; slowly adjust the extension electric guide chain 8 to slowly move the jacket 63 down along the auxiliary sleeve 1 and the outer wall of the lower bearing tube 62; when the distance between the jacket 63 and the upper bearing tube 61 reaches 0.2 meters, remove the baffle 4. Since the thermal insulation filler 71 is in an expanded state and has a certain friction resistance in the conical annular cavity, short-distance movement will not cause it to fall off. Continue to slowly drop the jacket 63 until it fits with the upper bearing tube 61;

[0133] Step 6: Adjust the installation position of the jacket 63, weld the conical cylinder 632 and the lower bearing cylinder 62, so as to seal the thermal insulation filler 71; after the welding is completed, fill the thermal insulation filler 71 in the conical annular cavity on the upper side of the jacket 63, and remove the auxiliary sleeve 1 at the same time;

[0134] Step 7: Repeat steps 1 to 6 to perform subsequent installation and fitting of the jacket 63 and filling of the thermal insulation filler 71;

[0135] Among them, when the rear section jacket 63 falls to the docking position with the previous section 63, the position of the rear section jacket 63 is adjusted circumferentially so that the socket ring 633 of the previous section jacket is inserted into the straight tube 631 of the rear section jacket to seal the thermal insulation filler 71; then the rear section jacket is pulled down to further compress the thermal insulation filler inside the previous section jacket.

[0136] After obtaining the lower load-bearing tube with a thermal insulation structure layer by the above method, different areas of the lower load-bearing tube are irradiated with X-rays. The results show that the thickness of each area of ​​the lower load-bearing tube is uniform, which means that the thermal insulation filler in the jacket of the external thermal insulation structure layer of the lower load-bearing tube is evenly filled without gaps.

[0137] The present invention has been described above in conjunction with preferred embodiments, but these embodiments are only exemplary and serve only as an illustration. On this basis, the present invention may be subjected to a variety of substitutions and improvements, all of which fall within the scope of protection of the present invention.

Claims

1. An auxiliary device for filling thermal insulation filler on the outer side of a high-temperature gas-cooled reactor bearing tube, the bearing tube comprising an upper bearing tube (61) and a lower bearing tube (62), a multi-section jacket (63) being sleeved on the outer side of the lower bearing tube (62), The jacket (63) comprises a thin-walled straight cylinder (631), a tapered cylinder (632) is arranged inside the thin-walled straight cylinder (631), and a socket ring (633) is arranged at the end of the thin-walled straight cylinder (631), and the outer diameter of the socket ring (633) is substantially equal to the inner diameter of the thin-walled straight cylinder (631); Each section of the jacket (63) and the lower bearing cylinder (62) are separated into two upper and lower conical annular cavities by a conical cylinder (632), and the conical annular cavity is filled with a high-density heat-insulating filler (71); Welding 3-4 temporary lifting ears (634) for temporary lifting on the outer wall of the thin-walled straight cylinder (631), and removing the temporary lifting ears (634) after the jacket (63) is installed in place; It is characterized in that The filling auxiliary device comprises an auxiliary sleeve (1), a turning hanger (2), a stop rod (3), a stop cover (4) and a supporting bolt (5); The auxiliary sleeve (1) comprises a cylinder body (11) having an outer diameter consistent with the outer diameter of the lower bearing cylinder (62). A plurality of support bolt extension holes (111) are evenly provided on the cylinder (11) along the circumferential direction, and the support bolts (5) can extend from the inside of the cylinder (11) to the outside of the cylinder (11) through the support bolt extension holes (111), thereby supporting the cone (632) of the jacket (63); A plurality of rows of blocking rod extension holes (112) are evenly arranged on the cylinder (11) along the circumferential direction, and the blocking rod (3) can extend from the inside of the cylinder (11) to the outside of the cylinder (11) through the blocking rod extension holes (112), so that the blocking rod (3) can divide one of the conical annular cavities into a plurality of sub-cavities; One or two groups of heat preservation units (7) can be accommodated in each of the sub-cavities; The blocking cover (4) is detachably fixedly mounted on the top of the conical annular cavity filled with the thermal insulation filler (71) to limit the sealing of the thermal insulation filler (71) in the vertical direction.

2. The auxiliary device for filling the outer side thermal insulation filler of the high temperature gas-cooled reactor bearing tube according to claim 1 is characterized in that: The auxiliary sleeve (1) further comprises a support ring (12) fixedly mounted on the inner side of the cylinder (11); the outer diameter of the support ring (12) is consistent with the inner diameter of the cylinder (11).

3. The auxiliary device for filling the outer side thermal insulation filler of the high temperature gas-cooled reactor bearing tube according to claim 2 is characterized in that: The support ring (12) is provided with a screw hole block (13) and a lug plate (15). The screw hole block (13) is provided with a threaded hole, which is coaxial with and connected to the support bolt extension hole (111) to increase the installation strength of the support bolt (5); The top end of the ear plate (15) extends out from the cylinder (11), and two ear plate connection holes are provided at the top end of the ear plate (15); a guiding inclined surface is also provided on the ear plate (15) for coaxial positioning when the auxiliary sleeve (1) and the lower bearing cylinder (62) are butt-jointed.

4. The auxiliary device for filling the outer side thermal insulation filler of the high temperature gas-cooled reactor bearing tube according to claim 1, characterized in that: A guide tube (14) is also provided inside the cylinder (11); the guide tube (14) is coaxial with and connected to the blocking rod extension hole (112); each blocking rod extension hole (112) corresponds to a guide tube (14); and the blocking rod (3) is fixedly supported by the guide tube (14).

5. The auxiliary device for filling the outer side thermal insulation filler of the high temperature gas-cooled reactor bearing tube according to claim 1, characterized in that: The tilting sling (2) is rod-shaped as a whole, one end of which is provided with two connection holes (21) for connecting with the lifting lug plate (15), and the other end of which is provided with a tilting lifting hole (22) and a jacket lifting hole (23).

6. The auxiliary device for filling the outer side thermal insulation filler of the high temperature gas-cooled reactor bearing tube according to claim 1, characterized in that: The blocking cover (4) comprises an arc-shaped blocking plate (41), a supporting plate (42) and a top screw (43). The baffle (4) is fixed to the end of the thin-walled straight cylinder (631) by clamping the end of the thin-walled straight cylinder (631) together with the support plate (42) and the top screw (43), so that the fan-shaped baffle (41) seals the thermal insulation filler (71) in the lower bearing cylinder (62) and the conical cylinder (632), and prevents the thermal insulation filler (71) from falling off from the conical cylinder (632) when the jacket (63) turns over with the auxiliary sleeve (1).

7. The auxiliary device for filling the outer side thermal insulation filler of the high temperature gas-cooled reactor bearing tube according to claim 1, characterized in that: The heat preservation unit (7) is prepared by the following method: Step a, cutting the profile of the heat-insulating filler (71) to be consistent with the cross-sectional shape of the conical annular cavity, Step b, after the multiple layers of heat-insulating fillers (71) are stacked, pressing plates (72) are added on both sides and pressed, and after being pressed to a predetermined density, they are tied with a binding belt (73) to obtain the heat-insulating unit (7); The thermal insulation filler (71) is a thick thermal insulation blanket made of asbestos material; The contour shape of the pressing plate (72) is consistent with the contour shape of the thermal insulation filler (71) after cutting. The predetermined density value is greater than the density value required in the conical annular cavity.

8. A method for filling the outer side of a high temperature gas-cooled reactor bearing tube with thermal insulation filler, characterized in that: The method is realized by the auxiliary device for filling the thermal insulation filler on the outer side of the high temperature gas-cooled reactor bearing tube according to any one of claims 1 to 7.

9. The method for filling the outer side of the high temperature gas-cooled reactor bearing tube with thermal insulation filler according to claim 8, characterized in that: The method comprises the following steps: Step 1: Place the auxiliary sleeve (1) stably on the ground, unscrew the support bolts (5), lift the jacket (63) so that the small end of the cone (632) faces downward, and insert it into the outside of the auxiliary sleeve (1), gradually move it downward until the cone (632) is against the support bolts (5) extending out of the cylinder body (11), the jacket (63) is in a stable state, and the cone (632) and the outer wall of the auxiliary sleeve (1) form a conical annular cavity; Step 2: insert the blocking rod (3) along the guide tube (14) and make the blocking rod (3) abut against the inner wall of the conical cylinder (632) or the thin-walled straight cylinder (631), so that the conical annular cavity is divided into a plurality of sub-cavities of equal size by the plurality of rows of blocking rods (3), and two groups of heat preservation units (7) are installed in each sub-cavity, and after the heat preservation units (7) are installed in place, the pressing plates (72) and the binding belts (73) thereon are removed; Step 3: After the heat-insulating filler (71) expands and fills the sub-cavity, all the baffle rods (3) are pulled out, and the baffle cover (4) is installed at the end of the thin-walled straight tube (631) of the jacket (63), so that the arc-shaped baffle plate (41) presses the upper end surface of the heat-insulating filler, and the baffle cover (4) is fixed to the jacket (63) through the support plate (42) and the top screw (43); Step 4: Install the flip sling (2) on the lifting ear plate (15) of the auxiliary sleeve (1), connect the jacket lifting hole (23) on the flip sling (2) with the temporary lifting ear (634) of the jacket with an electric guide chain (8), and tighten the electric guide chain (8) so that the cone (632) on the jacket (63) is continuously against the support bolt 5; use the flip lifting hole (22) to flip the auxiliary sleeve (1) 180 degrees, and after flipping, the thermal insulation filler (71) is located in the lower conical ring cavity and is supported and fixed in the conical ring cavity by the blocking cover (4); Step 5: Lift the auxiliary sleeve (1), remove the lower side flip sling (2) and place the auxiliary sleeve (1) on the upper end of the lower bearing tube (62), slowly adjust the extension electric guide chain (8) to slowly move the jacket (63) down along the outer wall of the auxiliary sleeve (1) and the lower bearing tube (62); when the distance between the jacket (63) and the upper bearing tube (61) reaches 0.2 meters, remove the blocking cover (4) and continue to slowly drop the jacket (63) until it fits with the upper bearing tube (61); Step 6: Adjust the installation position of the jacket (63), weld the conical cylinder (632) and the lower bearing cylinder (62), so as to seal the thermal insulation filler (71); after the welding is completed, fill the thermal insulation filler (71) in the conical annular cavity on the upper side of the jacket (63), and remove the auxiliary sleeve (1); Step 7: Repeat steps 1 to 6 to perform subsequent installation and fitting of the jacket (63) and filling of the thermal insulation filler (71); When the rear section jacket (63) falls to the docking position with the upper section (63), the position of the rear section jacket (63) is adjusted in the annular direction so that the socket ring (633) of the upper section jacket is inserted into the straight tube (631) of the rear section jacket to seal the thermal insulation filler (71); then the rear section jacket is pulled down to further compress the thermal insulation filler inside the upper section jacket.

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