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

Abstract

The application discloses a high-temperature gas cooled reactor load-bearing cylinder outer side heat preservation filler filling auxiliary device and a filling method, the auxiliary device comprises a cylinder body with an outer diameter consistent with the outer diameter of a lower load-bearing cylinder, a jacket is fixedly installed outside the cylinder body, thereby forming a conical ring cavity, heat preservation filler is filled in the upper conical ring cavity, after filling is completed, the auxiliary device is turned over, and is butted with the inverted lower load-bearing cylinder, the jacket with the heat preservation filler is transferred to the lower load-bearing cylinder, and after position adjustment is appropriate, welding and fixing can be carried out, on this basis, heat preservation filler is filled in another conical ring cavity of the jacket, and then the installation of one jacket is completed; the above operation is repeated, and the installation and sealing work of multiple jackets can be sequentially completed.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of pressure vessels, and particularly relates to a filling auxiliary device and a filling method for heat preservation filler outside a load-bearing cylinder of a high-temperature gas cooled reactor. BACKGROUND

[0002] The high-temperature gas cooled reactor nuclear power station adopts a new generation of nuclear power generation technology independently designed by China and having complete independent intellectual property rights, and 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 station, and the heat exchange inner part is the core of the steam generator. The heat exchange inner part is 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, as shown in Figure 5 When the equipment is running, the internal operating temperature is relatively high, and a heat preservation and insulation structure layer is installed outside the lower load-bearing cylinder 62.

[0004] The heat preservation structure includes a plurality of jacket sleeves 63 sleeved outside the lower load-bearing cylinder, and the inside is filled with heat preservation filler 71 with high density for heat insulation. The jacket sleeve 63 is designed to be installed and sealed by a plurality of section socket structures, and each jacket sleeve 63 is composed of a thin-walled straight cylinder 631, a tapered cylinder 632 and a socket ring 633.

[0005] After each jacket sleeve 63 is sleeved with the lower load-bearing cylinder 62, the tapered cylinder 632 forms upper and lower two side tapered annular cavities with the outer wall thereof, the jacket sleeve 63 is sleeved on the lower load-bearing cylinder 62 and filled with heat preservation filler 71, and the tapered cylinder 632 is welded with the lower load-bearing cylinder 62 to seal the heat preservation filler 71 on one side in the jacket sleeve 63; the socket ring 633 is inserted into the straight cylinder 631 to realize the sealing of the heat preservation filler 71 on the other side.

[0006] The heat preservation filler 71 is a heat preservation blanket made of asbestos, and the density thereof is 110 kg / m 3 in normal state. The design requires that the filling density of the heat preservation filler 71 is between 165-200 kg / m 3 , and the density needs to be uniform and without gaps during filling, so the heat preservation filler needs to be compressed and filled.

[0007] The outer diameter of the lower load-bearing cylinder 62 is 3.2 meters, the inner diameter of the straight cylinder 631 of the jacket sleeve is 3.4 meters, and the height of each jacket sleeve 63 is 1 meter. From the structure, the tapered annular cavity space is narrow and deep, and there is a risk of local filling incompleteness or filling failure at the sharp corner formed at the top of the tapered annular cavity. It is difficult to apply compression force to the lower side tapered annular cavity during the filling of the heat preservation filler, and it is difficult to meet the density requirement.

[0008] In addition, the jacket 63 is sleeved along the outer wall of the lower load-bearing cylinder 62 to contact the upper load-bearing cylinder 61, and the thermal insulation filler 71 has a large frictional resistance with the outer wall of the lower load-bearing cylinder 62 during movement, which has a risk of falling off or uneven density, so that the filling requirement of the design cannot be met.

[0009] In summary, the installation of the jacket 63 on the outer side of the load-bearing cylinder and the high-density filling of the thermal insulation filler 71 both have great difficulties, and a device and a corresponding installation and filling method for assisting installation and filling are urgently needed. SUMMARY

[0010] In order to overcome the above problems, the present application is designed to provide a high-temperature gas cooled reactor load-bearing cylinder outer side thermal insulation filler filling auxiliary device and a filling method, which comprises a cylinder body with an outer diameter consistent with the outer diameter of the lower load-bearing cylinder, a jacket is fixedly installed on the outer side of the cylinder body, thereby forming 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 is connected with the inverted lower load-bearing cylinder, the jacket with the thermal insulation filler is transferred to the lower load-bearing cylinder, and after the position is adjusted, welding and fixing can be carried out, on this basis, the thermal insulation filler is filled in the other conical annular cavity of the jacket, and the installation of one jacket is completed.

[0011] Specifically, the purpose of the present application is to provide a high-temperature gas cooled reactor load-bearing cylinder outer side thermal insulation filler filling auxiliary device, the load-bearing cylinder comprises an upper load-bearing cylinder 61 and a lower load-bearing cylinder 62, a plurality of jackets 63 are sleeved on the outer side of the lower load-bearing cylinder 62,

[0012] The jacket 63 comprises a thin-walled straight cylinder 631, a tapered cylinder 632 is arranged in 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;

[0013] Each jacket 63 and the lower load-bearing cylinder 62 are separated into two conical annular cavities by the tapered cylinder 632, and high-density thermal insulation filler 71 is filled in the conical annular cavities;

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

[0015] The filling auxiliary device comprises an auxiliary sleeve 1, a turnover lifting device 2, a blocking rod 3, a blocking cover 4 and a supporting bolt 5;

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

[0017] A plurality of support bolt extension holes 111 are evenly arranged on the cylinder body 11 in the circumferential direction, and the support bolt 5 can extend from the inside of the cylinder body 11 to the outside of the cylinder body 11 through the support bolt extension hole 111, thereby supporting the tapered cylinder 632 of the jacket 63;

[0018] A plurality of baffle rod extension holes 112 are evenly arranged on the cylinder body 11 in the circumferential direction, and the baffle rod 3 can extend from the inside of the cylinder body 11 to the outside of the cylinder body 11 through the baffle rod extension hole 112, thereby separating one of the tapered annular cavities into a plurality of sub-cavities by the baffle rod 3;

[0019] Each of the sub-cavities can accommodate one or two groups of heat preservation units 7;

[0020] The baffle cover 4 is detachably fixed and installed at the top of the tapered annular cavity filled with the heat preservation filler 71, and is used for limiting and sealing the heat preservation filler 71 in the vertical direction.

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

[0022] The support ring 12 is provided with a threaded hole block 13 and a lifting lug plate 15,

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

[0024] The lifting lug plate 15 extends from the cylinder body 11 at the top end, and two lifting lug plate connecting holes are arranged at the top end of the lifting lug plate 15; a guide inclined surface is further arranged on the lifting lug plate 15, so as to coaxially position the auxiliary sleeve 1 and the lower bearing cylinder 62 when they are docked.

[0025] The cylinder body 11 is further provided with a guide pipe 14, the guide pipe 14 is coaxial and communicated with the baffle rod extension hole 112, and each baffle rod extension hole 112 corresponds to one guide pipe 14; the baffle rod 3 is fixed and limited by the guide pipe 14.

[0026] The whole of the turnover lifting appliance 2 is in the shape of a rod, one end of which is provided with two connecting holes 21 connected with the lifting lug plate 15, and the other end is provided with a turnover lifting hole 22 and a jacket lifting hole 23.

[0027] The baffle cover 4 comprises an arc-shaped baffle plate 41, a support plate 42 and a top screw 43,

[0028] The cover 4 is fixed on the end of the thin-walled straight cylinder 63 by clamping the end of the thin-walled straight cylinder 63 with the support plate 42 and the top wire 43, so that the arc-shaped baffle 41 blocks the thermal insulation filler 71 in the lower bearing cylinder 62 and the tapered cylinder 632, preventing the thermal insulation filler 71 from falling out of the tapered cylinder 632 when the jacket 63 is turned over with the auxiliary sleeve 1.

[0029] The thermal insulation unit 7 is prepared by the following method:

[0030] Step a: the profile shape of the thermal insulation filler 71 is cut to be consistent with the cross-sectional shape of the tapered annular cavity,

[0031] Step b: after the multi-layer thermal insulation filler 71 is stacked, the pressure plates 72 are added on both sides and pressed, and after the pressure plates 72 are pressed to a predetermined density, the thermal insulation unit 7 is obtained by bundling with the bundling belts 73;

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

[0033] The profile shape of the pressure plate 72 is consistent with the profile shape of the cut thermal insulation filler 71,

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

[0035] The application also provides a method for filling thermal insulation filler outside a high-temperature gas cooled reactor bearing cylinder, which is realized by using the above-mentioned auxiliary device for filling thermal insulation filler outside a high-temperature gas cooled reactor bearing cylinder.

[0036] The method comprises the following steps:

[0037] Step one: place the auxiliary sleeve 1 stably on the ground, unscrew the support bolts 5, hoist the jacket 63, make the small end of the tapered cylinder 632 face downward, and then put it into the outside of the auxiliary sleeve 1, gradually move downward until the tapered cylinder 632 is supported on the support bolts 5 of the extended cylinder body 11, and the jacket 63 is in a stable state and the tapered annular cavity is formed between the tapered cylinder 632 and the outer wall of the auxiliary sleeve 1;

[0038] Step two: insert the stopper 3 along the guide pipe 14, and make the stopper 3 abut against the inner wall of the tapered cylinder 632 or the thin-walled straight cylinder 631, so that the tapered annular cavity is divided into multiple sub-cavities with equal sizes by multiple rows of stoppers 3, 2 groups of thermal insulation units 7 are installed in each sub-cavity, and the pressure plates 72 and the bundling belts 73 on the thermal insulation units 7 are removed after the thermal insulation units 7 are installed in place;

[0039] Step three: after the thermal insulation filler 71 is expanded and filled in the sub-cavity, all the stoppers 3 are pulled out, the cover 4 is installed on the end of the thin-walled straight cylinder 631 of the jacket 63, the arc-shaped baffle 41 is pressed against the upper end surface of the thermal insulation filler, and the cover 4 is fixed on the jacket 63 by the support plate 42 and the top wire 43;

[0040] Step four: install the turnover hoist 2 on the lug plate 15 of the auxiliary sleeve 1, connect the clamping sleeve lifting hole 23 and the clamping sleeve temporary lifting lug 634 on the turnover hoist 2 with the electric guide chain 8, and pull the electric guide chain 8 tightly, so that the taper cylinder 632 on the clamping sleeve 63 continuously abuts against the supporting bolt 5; use the turnover lifting hole 22 to make the auxiliary sleeve 1 turn over by 180°, and after the turnover, the thermal insulation filler 71 is located on the lower side of the tapered annular cavity and is fixed in the tapered annular cavity by the cover 4;

[0041] Step five: lift the auxiliary sleeve 1, remove the lower side turnover hoist 2, and place the auxiliary sleeve 1 on the upper end of the lower supporting cylinder 62, slowly adjust the lengthened electric guide chain 8, so that the clamping sleeve 63 slowly moves downward along the outer wall of the auxiliary sleeve 1 and the lower supporting cylinder 62; when the distance between the clamping sleeve 63 and the upper supporting cylinder 61 reaches 0.2 meters, remove the cover 4, and continue to slowly lower the clamping sleeve 63 until it is attached to the upper supporting cylinder 61;

[0042] Step six: adjust the installation position of the clamping sleeve 63, and weld the taper cylinder 632 and the lower supporting cylinder 62, so as to seal the thermal insulation filler 71; after welding is completed, fill the thermal insulation filler 71 in the tapered annular cavity on the upper side of the clamping sleeve 63, and remove the auxiliary sleeve 1;

[0043] Step seven: repeat steps one to six to install, sleeve and fill the thermal insulation filler 71 of the subsequent clamping sleeve 63;

[0044] When the next section of the clamping sleeve 63 falls to the joint position with the previous section of the clamping sleeve 63, the position of the next section of the clamping sleeve 63 is adjusted in the ring direction, so that the socket ring 633 of the previous section of the clamping sleeve is inserted into the straight cylinder 631 of the next section of the clamping sleeve, the thermal insulation filler 71 is sealed, and the thermal insulation filler in the previous section of the clamping sleeve is further compressed by pulling down the next section of the clamping sleeve.

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

[0046] (1) The high-temperature gas cooled reactor supporting cylinder outer side thermal insulation filler filling auxiliary device and filling method provided by the present application gives an efficient and high-quality thermal insulation filler filling method, which can simulate the lower supporting cylinder, fill the thermal insulation filler in advance, and turn over to transfer the upper side filled thermal insulation filler to the lower side, thereby avoiding the compression and filling of the thermal insulation filler from the lower side, and improving the filling quality;

[0047] (2) The high-temperature gas cooled reactor supporting cylinder outer side thermal insulation filler filling auxiliary device and filling method provided by the present application, the turnover hoist is arranged in the auxiliary device, which can make the auxiliary sleeve turn over smoothly by 180° after the clamping sleeve is installed, so as to ensure that the clamping sleeve does not contact the rope and prevent the rope from scratching and damaging the clamping sleeve; at the same time, the electric guide chain connected with the clamping sleeve lifting hole is used to stably and efficiently send each section of the clamping sleeve to the installation position outside the supporting cylinder.

[0048] (3) The high-temperature gas cooled reactor load-bearing cylinder outer side heat preservation filler filling auxiliary device and filling method provided by the application, the stop rod in the auxiliary device cooperates with the auxiliary sleeve to divide the to-be-filled conical annular cavity into multiple uniform sub-cavities, independent filling of each sub-cavity is realized, the filling effect and density requirement are ensured, the filling difficulty of high-density heat preservation filler is greatly reduced, and the filling density can be accurately calculated;

[0049] (4) The high-temperature gas cooled reactor load-bearing cylinder outer side heat preservation filler filling auxiliary device and filling method provided by the application, the cover in the auxiliary device can effectively fix the heat preservation filler in the conical annular cavity, and prevent the heat preservation filler from falling off during the overturning and sleeving process of the jacket;

[0050] (5) The high-temperature gas cooled reactor load-bearing cylinder outer side heat preservation filler filling auxiliary device and filling method provided by the application, the manufacturing and compression method of the heat preservation unit are given in the method, the filling difficulty of the heat preservation filler is reduced, and the filling efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 A structure schematic diagram of the high-temperature gas cooled reactor load-bearing cylinder outer side heat preservation filler filling auxiliary device provided by the application is shown.

[0052] Figure 2 A three-dimensional structure and a partial cross-sectional schematic diagram of the auxiliary sleeve of the high-temperature gas cooled reactor load-bearing cylinder outer side heat preservation filler filling auxiliary device provided by the application are shown.

[0053] Figure 3 A structure schematic diagram of the overturning lifting appliance of the high-temperature gas cooled reactor load-bearing cylinder outer side heat preservation filler filling auxiliary device provided by the application is shown.

[0054] Figure 4a A structure schematic diagram of the cover of the high-temperature gas cooled reactor load-bearing cylinder outer side heat preservation filler filling auxiliary device provided by the application is shown.

[0055] Figure 4b A cross-sectional schematic diagram of the high-temperature gas cooled reactor load-bearing cylinder outer side heat preservation filler filling auxiliary device provided by the application is shown. Figure 4a at A-A.

[0056] Figure 5 A structure schematic diagram of the load-bearing cylinder is shown.

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

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

[0059] Figure 8Fig. 1 shows a schematic diagram of step one of the method for filling heat-insulating filler outside a load-bearing cylinder of a high-temperature gas-cooled reactor according to the present application, i.e. installation of a jacket;

[0060] Figure 9 Fig. 2 shows a schematic diagram of step two of the method for filling heat-insulating filler outside a load-bearing cylinder of a high-temperature gas-cooled reactor according to the present application, i.e. installation of a heat-insulating unit;

[0061] Figure 10 Fig. 3 shows a schematic diagram of step three of the method for filling heat-insulating filler outside a load-bearing cylinder of a high-temperature gas-cooled reactor according to the present application, i.e. structure after installation of a cover;

[0062] Figure 11 Fig. 4 shows a schematic diagram of step four of the method for filling heat-insulating filler outside a load-bearing cylinder of a high-temperature gas-cooled reactor according to the present application, i.e. after 180° turning of an auxiliary sleeve;

[0063] Figure 12 Fig. 5 shows a schematic diagram of step five of the method for filling heat-insulating filler outside a load-bearing cylinder of a high-temperature gas-cooled reactor according to the present application, i.e. when the jacket is moved downward to the outside of a lower load-bearing cylinder;

[0064] Figure 13 Fig. 6 shows a schematic diagram of step six of the method for filling heat-insulating filler outside a load-bearing cylinder of a high-temperature gas-cooled reactor according to the present application, i.e. when a conical cylinder is welded to a lower load-bearing cylinder;

[0065] Figure 14 Fig. 7 shows a schematic diagram of step seven of the method for filling heat-insulating filler outside a load-bearing cylinder of a high-temperature gas-cooled reactor according to the present application, i.e. when a next jacket is installed.

[0066] Legend of reference signs

[0067] 1 - auxiliary sleeve

[0068] 11 - cylinder body

[0069] 111 - support bolt extension hole

[0070] 112 - baffle rod extension hole

[0071] 12 - support ring

[0072] 13 - threaded hole block

[0073] 14 - guide pipe

[0074] 15 - lifting lug plate

[0075] 2 - turning lifting device

[0076] 21 - connecting hole

[0077] 22 - turning lifting hole

[0078] 23 - jacket lifting hole

[0079] 3 - stopper rod

[0080] 4 - cover

[0081] 41 - arc-shaped baffle

[0082] 42 - support plate

[0083] 43 - jackscrew

[0084] 5 - support bolt

[0085] 61 - upper supporting cylinder

[0086] 62 - lower supporting cylinder

[0087] 63 - jacket

[0088] 631 - thin-walled straight cylinder

[0089] 632 - tapered cylinder

[0090] 633 - socket ring

[0091] 634 - temporary lifting lug

[0092] 7 - heat-insulating unit

[0093] 71 - heat-insulating filler

[0094] 72 - pressing plate

[0095] 73 - binding belt

[0096] 8 - electrically-driven guide chain DETAILED DESCRIPTION

[0097] The present application will be further described in detail by the accompanying drawings and examples. The features and advantages of the present application will become more apparent from these descriptions.

[0098] The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. Unless specifically stated otherwise, the drawings are not drawn to scale and the disclosure is not limited to the specific embodiments illustrated in the drawings.

[0099] The present application provides a kind of high temperature gas cooled reactor supporting cylinder outside heat-insulating filler filling auxiliary device, as shown in Figure 5 and Figure 6 The supporting cylinder includes upper supporting cylinder 61 and lower supporting cylinder 62, and multiple jackets 63 are sleeved outside the lower supporting cylinder 62,

[0100] 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, the outer diameter of the socket ring 633 is substantially equal to the inner diameter of the thin-walled straight cylinder 631;

[0101] Each jacket 63 and the lower bearing cylinder 62 are separated by the tapered cylinder 632 into two tapered ring cavities, and high-density thermal insulation filler 71 is filled in the tapered ring cavities; the jacket 63 is sleeved into the installation position along the lower end of the lower bearing cylinder 62 and is circumferentially welded and sealed with the bearing cylinder; the jackets 63 are inserted into the inside of the straight cylinder 631 through the socket ring 633 to realize the sealing of the thermal insulation filler 71.

[0102] Three to four temporary lifting lugs 634 are welded on the outer wall of the thin-walled straight cylinder 631 for temporary lifting, and the temporary lifting lugs 634 are removed after the jacket 63 is installed in place;

[0103] Preferably, as Figure 1 、 Figure 2 、 Figure 3 and shown in FIG. 4, the filling auxiliary device comprises an auxiliary sleeve 1, a turnover hoist 2, a blocking rod 3, a blocking cover 4, and a supporting bolt 5;

[0104] The auxiliary sleeve 1 comprises a cylinder body 11 with an outer diameter consistent with the outer diameter of the lower bearing cylinder 62, a plurality of supporting bolt extension holes 111 are uniformly arranged on the cylinder body 11 in the circumferential direction, and the supporting bolt 5 can be extended from the inside of the cylinder body 11 to the outside of the cylinder body 11 through the supporting bolt extension holes 111, thereby supporting the tapered cylinder 632 of the jacket 63;

[0105] A plurality of blocking rod extension holes 112 are uniformly arranged on the cylinder body 11 in the circumferential direction, each column of blocking rod extension holes 112 comprises a plurality of blocking rod extension holes 112 uniformly distributed and consistent in vertical spacing with each other; the blocking rod 3 can be extended from the inside of the cylinder body 11 to the outside of the cylinder body 11 through the blocking rod extension holes 112, thereby separating one of the tapered ring cavities into a plurality of sub-cavities by the blocking rod 3;

[0106] One or two groups of thermal insulation units 7 can be accommodated in each of the sub-cavities; the specific number is determined by the size of the sub-cavities and the size of the thermal insulation units.

[0107] The blocking cover 4 is detachably fixed and installed at the top of the tapered ring cavity filled with the thermal insulation filler 71, and is used for limiting and sealing 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 installed inside the barrel 11, the outer diameter of the support ring 12 is consistent with the inner diameter of the barrel 11. The support ring 12 is arranged at both ends of the barrel, and the purpose is to increase the roundness and rigidity of the barrel, prevent the barrel from being deformed in the process of hoisting and overturning, and affect the subsequent movement of the jacket along the outer wall of the sleeve and the bearing barrel.

[0109] In a preferred embodiment, a threaded hole block 13 and a lifting lug plate 15 are arranged on the support ring 12,

[0110] The threaded hole block 13 is provided with a threaded hole coaxial and communicated with the support bolt extension hole 111, so as to increase the mounting strength of the support bolt 5;

[0111] The lifting lug plate 15 extends from the top end of the barrel 11, and two lifting lug plate connecting holes are arranged at the top end of the lifting lug plate 15. A guide slope is further arranged on the lifting lug plate 15, so as to be coaxially positioned when the auxiliary sleeve 1 is connected with the lower bearing barrel 62.

[0112] In a preferred embodiment, a guide pipe 14 is further arranged inside the barrel 11, the guide pipe 14 is coaxial and communicated with the stopper extension hole 112, and each stopper extension hole 112 corresponds to a guide pipe 14. The stopper 3 is fixedly limited and supported by the guide pipe 14, so as to avoid the direction of the stopper 3 being skewed.

[0113] In a preferred embodiment, the overturning lifting tool 2 is in the shape of a rod, one end of which is provided with two connecting holes 21 connected with the lifting lug plate 15, and the other end is provided with an overturning hoisting hole 22 and a jacket hoisting hole 23. When the overturning lifting tool is connected with the auxiliary sleeve 1 provided with the jacket 63, the position of the overturning hoisting hole 22 can always keep the hoisting rope from contacting the jacket 63 during overturning, so as to avoid the rope from being scratched and damaged.

[0114] In the present application, the auxiliary sleeve 1 is preferably symmetrical in upper and lower directions, that is, the support ring 12, the threaded hole block 13 and the support bolt 5 are provided with two groups of upper and lower parts, which are symmetrical to each other, so that the auxiliary sleeve can still be used and installed after being overturned by 180 degrees. Since it is difficult and risky to overturn the auxiliary sleeve 1, the above-mentioned symmetrical design can effectively reduce the overturning frequency of the auxiliary sleeve, and can directly continue to meet the use requirements of the next jacket after the sleeve is overturned.

[0115] In a preferred embodiment, the cover 4 comprises an arc-shaped baffle 41, a support plate 42 and a top screw 43,

[0116] The cover 4 is fixed on the end of the thin-walled straight cylinder 631 by supporting plate 42 and top wire 43 clamping the end of the thin-walled straight cylinder 631 together, so that the arc-shaped baffle 41 blocks the thermal insulation filler 71 in the lower bearing cylinder 62 and the tapered cylinder 632, preventing the thermal insulation filler 71 from falling out of the tapered cylinder 632 when the jacket 63 is turned over with the auxiliary sleeve 1.

[0117] In a preferred embodiment, as shown in Figure 7 , the thermal insulation unit 7 is prepared by the following method:

[0118] Step a, the profile shape of the thermal insulation filler 71 is cut to match the cross-sectional shape of the tapered annular cavity,

[0119] Step b, after the multi-layer thermal insulation filler 71 is stacked, pressure plates 72 are added on both sides and compressed to a predetermined density, and then tied with a tie belt 73, so that the thermal insulation unit 7 is obtained;

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

[0121] The profile shape of the pressure plate 72 matches the profile shape of the cut thermal insulation filler 71,

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

[0123] The compression density of the compressed thermal insulation unit is greater than the required filling density, which is intended to leave a certain space for the compression plate and the removal of the tie belt when the thermal insulation unit 7 is installed in the sub-cavity, and when the tie belt 73 is removed, the thermal insulation filler 71 in each group of thermal insulation units slowly expands outward to fill the space in the tapered annular cavity, still meeting the filling density.

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

[0125] The application also provides a method for filling thermal insulation filler outside the bearing cylinder of a high-temperature gas cooled reactor, as shown in Figures 8 to 14 , which is realized by the above-mentioned auxiliary device for filling thermal insulation filler outside the bearing cylinder of a high-temperature gas cooled reactor.

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

[0127] Step one: Put the auxiliary sleeve 1 on the ground, unscrew the support bolt 5, preferably the lower support bolt 5; lift the clamp sleeve 63 so that the small end of the cone cylinder 632 is downward, and put it into the outside of the auxiliary sleeve 1, gradually move down until the cone cylinder 632 is against the support bolt 5 of the extended cylinder 11, the clamp sleeve 63 is in a stable state and the cone cylinder 632 forms a conical annular cavity with the outer wall of the auxiliary sleeve 1;

[0128] Step two: Insert the stop rod 3 along the guide pipe 14, and make the stop rod 3 abut with the inner wall of the cone cylinder 632 or the thin-walled straight cylinder 631, so that the conical annular cavity is divided into several sub-cavities with equal size by multiple rows of stop rods 3, 2 groups of heat preservation units 7 are installed in each sub-cavity, and the pressing plate 72 and the binding belt 73 on the heat preservation unit 7 are removed after the heat preservation unit 7 is installed in place; the purpose is to facilitate the removal of the pressing plate 72 and the binding belt 73.

[0129] In this application, the heat preservation unit 7 is made with a width of 0.4 meters, the sub-cavity is divided into twelve parts, and the annular distance of the sub-cavity is 0.9 meters, which can meet the installation of 2 groups of heat preservation units 7 and the space for removing the pressing plate 72 and the binding belt 73, and the density of the heat preservation filler can reach 178 kg / m 3 after expansion, which meets the filling requirements.

[0130] Step three: After the heat preservation filler 71 is expanded and filled in the sub-cavity, all the stop rods 3 are pulled out, at this time the heat preservation filler 71 is expanded and filled in the cavity, and since the compression direction is annular, it will not expand in the axial direction of the auxiliary sleeve 1. Install the cover 4 at the straight end of the clamp sleeve 63, so that the arc-shaped baffle 41 presses the upper end surface of the heat preservation filler, and the cover 4 is fixed on the clamp sleeve 63 through the support plate 42 and the top wire 43;

[0131] Step four: Install the turnover lifting tool 2 on the lifting lug plate 15 of the auxiliary sleeve 1, which can also be installed in step 1; connect the clamp sleeve lifting hole 23 on the turnover lifting tool 2 with the temporary clamp sleeve lifting lug 634 by the electric guide chain 8, and tighten the electric guide chain 8, so that the cone cylinder 632 on the clamp sleeve 63 continuously abuts against the support bolt 5; the electric guide chain 8 is a commonly used tool, and the specification should meet the moving stroke of the clamp sleeve 63. Use the turnover lifting hole 22 to make the auxiliary sleeve 1 turn over 180°, and after turning over, the heat preservation filler 71 is located on the lower conical annular cavity and is fixed in the conical annular cavity by the cover 4;

[0132] Step five: hoist the auxiliary sleeve 1, remove the lower overturning lifting tool 2 and place the auxiliary sleeve 1 on the upper end of the lower load-bearing cylinder 62, at this time the auxiliary sleeve 1 is guided by the lifting lug plate 15 and can be well kept coaxial with the lower load-bearing cylinder 62. Before performing this operation, place the load-bearing cylinder assembly 6 upside down; slowly adjust the extension electric guide chain 8 to make the clamp sleeve 63 slowly move down along the outer wall of the auxiliary sleeve 1 and the lower load-bearing cylinder 62; when the distance between the clamp sleeve 63 and the upper load-bearing cylinder 61 reaches 0.2 meters, remove the cover 4, because the thermal insulation filler 71 is in an expanded state and has a certain frictional resistance in the conical ring cavity, short-distance movement will not cause falling off, continue to slowly lower the clamp sleeve 63 until it is attached to the upper load-bearing cylinder 61;

[0133] Step six: adjust the installation position of the clamp sleeve 63, weld the conical cylinder 632 with the lower load-bearing cylinder 62, so as to seal the thermal insulation filler 71; after welding, fill the thermal insulation filler 71 in the conical ring cavity on the upper side of the clamp sleeve 63, and remove the auxiliary sleeve 1;

[0134] Step seven: repeat steps one to six to install, sleeve and fill the thermal insulation filler 71 of the subsequent clamp sleeve 63;

[0135] Wherein, when the next section of the clamp sleeve 63 falls to the interface position with the previous section of the clamp sleeve 63, the position of the next section of the clamp sleeve 63 is adjusted in the ring direction, so that the socket ring 633 of the previous section of the clamp sleeve is inserted into the straight cylinder 631 of the next section of the clamp sleeve, the thermal insulation filler 71 is sealed, and the thermal insulation filler in the previous section of the clamp sleeve is further compressed by pulling down the next section of the clamp sleeve.

[0136] After obtaining the lower load-bearing cylinder with a thermal insulation structure layer by the above method, different regions of the lower load-bearing cylinder are irradiated by X-rays, and the results show that the thickness of each region of the lower load-bearing cylinder is uniform, that is, it can be known that the thermal insulation filler in the clamp sleeve on the outer thermal insulation structure layer of the lower load-bearing cylinder is uniformly filled without gaps.

[0137] The above describes the present application in combination with preferred embodiments, but these embodiments are only exemplary and serve only to illustrate. On this basis, various substitutions and improvements can be made to the present application, which all fall within the protection scope of the present application.

Claims

1. A 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 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), wherein 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) is separated into two upper and lower conical annular cavities by a conical cylinder (632), and the conical annular cavities are filled with high-density thermal insulation fillers (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 turnover hanger (2), a blocking rod (3), a blocking cover (4) and a supporting bolt (5); The auxiliary sleeve (1) comprises a cylinder (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 uniformly 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 rods (3) can extend from the inside of the cylinder (11) to the outside of the cylinder (11) through the blocking rod extension holes (112), thereby dividing the conical annular cavity into a plurality of sub-cavities through the blocking rods (3); Each of the sub-cavities can accommodate one or two groups of heat preservation units (7); The blocking cover (4) is detachably fixedly mounted on the top of the conical annular cavity filled with the heat-insulating filler (71) to limit the sealing of the heat-insulating filler (71) in the vertical direction.

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

4. The auxiliary device for filling the outer side of the high temperature gas-cooled reactor bearing tube with thermal insulation filler 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 communicates with 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 supported by the guide tube (14).

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

6. The auxiliary device for filling the outer side of the high temperature gas-cooled reactor bearing tube with thermal insulation filler 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 arc-shaped baffle (41) seals the thermal insulation filler (71) in the lower bearing cylinder (62) and the conical cylinder (632), preventing the thermal insulation filler (71) from falling out of the conical cylinder (632) when the jacket (63) is turned over with the auxiliary sleeve (1).

7. The auxiliary device for filling the outer side of the high temperature gas-cooled reactor bearing tube with thermal insulation filler according to claim 1, characterized in that: The heat preservation unit (7) is prepared by the following method: Step a, cutting the outline shape of the heat-insulating filler (71) to be consistent with the cross-sectional shape of the conical ring cavity, Step b, after stacking the multiple layers of heat-insulating fillers (71), adding compression plates (72) on both sides and pressing them tightly, and then bundling them with a bundling belt (73) after compacting them to a predetermined density, 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 outer side of the high-temperature gas-cooled reactor bearing tube with thermal insulation filler 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) 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 it downward until the cone (632) is against the support bolts (5) extending out of the cylinder (11), and 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 multiple 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; Step 3: After the thermal insulation 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 (41) presses the upper end surface of the thermal insulation filler, and the blocking 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 lug plate (15) of the auxiliary sleeve (1), connect the jacket lifting hole (23) on the flip sling (2) with the jacket temporary lifting lug (634) with an electric guide chain (8), and tighten the electric guide chain (8) so that the cone (632) on the jacket (63) is continuously pressed 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 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 cylinder (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 cylinder (62); when the distance between the jacket (63) and the upper bearing cylinder (61) reaches 0.2 meters, remove the blocking cover (4) and continue to slowly lower the jacket (63) until it fits with the upper bearing cylinder (61); Step 6: Adjust the installation position of the jacket (63), weld the conical cylinder (632) and the lower bearing cylinder (62), thereby sealing 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; 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 front section jacket (63), the position of the rear section jacket (63) is adjusted in the circumferential direction so that the socket ring (633) of the front section jacket (63) is inserted into the straight tube (631) of the rear section jacket to seal the thermal insulation filler (71); and then the rear section jacket is pulled down to further compress the thermal insulation filler inside the front section jacket.

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