Installation method of penetration parts and water tank

Abstract

The present invention provides a method for installing a penetration piece and a water tank, and relates to the technical field of nuclear power construction. After the water tank and the penetration piece are hoisted and placed in place, the actual positions of the water tank and the penetration piece are detected, and the deviation between the actual position of the water tank and the preset position of the water tank meets the first preset deviation range, and the deviation between the actual position of the penetration piece and the preset position of the penetration piece meets the second preset deviation range before welding construction is performed; and after the penetration piece and the water tank and the reinforcement ring plate and the penetration piece are welded, the actual positions of the water tank and the penetration piece are re-measured, and the deviation between the actual position of the water tank and the preset position of the water tank meets the first preset deviation range, and the deviation between the actual position of the penetration piece and the preset position of the penetration piece meets the second preset deviation range before welding the reinforcement ring plate and the truncated cone. The accuracy of the position of the penetration piece and the water tank can be improved, thereby ensuring that the position of the penetration piece and the water tank meets the deviation requirements.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power construction, and in particular to a penetration piece and a water tank installation method. Background Art

[0002] The safety injection system is an important barrier to prevent the core from melting due to unexpected circumstances and causing nuclear leakage.

[0003] The penetration piece and water tank are important components of the safety injection system. The penetration piece and water tank are installed on the bottom plate of the steel lining of the reactor building raft foundation. One end of the penetration piece is connected to the water tank by a stainless steel single-sided bevel fillet weld. The other end of the penetration piece passes through the steel lining and communicates with the surrounding plant. When the penetration piece passes through the steel lining, the connection between the penetration piece and the steel lining is a dissimilar steel single-sided bevel fillet weld.

[0004] However, during the installation process, the penetration piece and the water tank are usually displaced, which may result in that the positions of the penetration piece and the water tank cannot meet the deviation requirements after the installation is completed. Summary of the invention

[0005] The object of the present invention is to provide a penetration piece and a water tank installation method to solve the technical problem in the prior art that the positions of the water tank and the penetration piece cannot meet the deviation requirements.

[0006] The penetration piece and water tank installation method provided by the present invention include the following steps:

[0007] Step S1: Position and adjust the water tank and the penetration piece. After the water tank and the penetration piece are adjusted to preset positions respectively, the water tank and the penetration piece are hoisted and placed in place;

[0008] Step S2: measuring the actual position of the water tank, and checking whether the deviation between the actual position of the water tank and the preset position of the water tank meets the first preset deviation range;

[0009] Measuring the actual position of the penetration member, and checking whether the deviation between the actual position of the penetration member and the preset position of the penetration member meets the second preset deviation range;

[0010] Step S3: pairing the welds between the penetration piece and the water tank, pairing the welds between the reinforcing ring plate and the penetration piece, and pairing the welds between the reinforcing ring plate and the truncated cone;

[0011] Step S4: welding the penetration piece and the water tank, and performing nondestructive testing on the welding portion between the penetration piece and the water tank; welding the reinforcing ring plate and the penetration piece, and performing nondestructive testing on the welding portion between the reinforcing ring plate and the penetration piece;

[0012] Step S5: re-measure the actual position of the water tank to check whether the deviation between the actual position of the water tank and the preset position of the water tank meets the first preset deviation range;

[0013] Re-measure the actual position of the penetration component to check whether the deviation between the actual position of the penetration component and the preset position of the penetration component meets the second preset deviation range;

[0014] Step S6: welding the reinforcing ring plate and the truncated cone.

[0015] Furthermore, before step S1, the following steps are also included:

[0016] Step S0: assembling the weld joints of the penetration piece and the anchor plate, welding the penetration piece and the anchor plate, and performing nondestructive testing on the welds between the penetration piece and the anchor plate.

[0017] Furthermore, step S3 also includes the following steps: placing a counterweight on the top of the water tank.

[0018] Further, placing a counterweight on the top of the water tank comprises the following steps:

[0019] Lay a plate on the top of the water tank; place a counterweight on the plate, the weight of the counterweight is 2.8 tons - 3.2 tons; set up guardrails around the water tank.

[0020] Further, measuring the actual position of the water tank comprises the following steps:

[0021] Measure the position information of the center points of the four side panels of the water tank to measure the actual position of the water tank;

[0022] Measuring the actual position of a penetration involves the following steps:

[0023] The position information of two points on the outer surface of the penetration is measured to measure the actual position of the penetration.

[0024] Furthermore, the first preset deviation range includes a horizontal deviation range and a first elevation deviation range, the horizontal deviation range is ±5 mm, and the first elevation deviation range is ±5 mm;

[0025] The second preset deviation range includes an axis deviation range and a second elevation direction deviation range, the axis deviation range is ±30 mm, and the second elevation direction deviation range is ±15 mm.

[0026] Further, retesting the actual position of the water tank includes the following steps:

[0027] Measure the position information of the center points of the four side panels of the water tank to measure the actual position of the water tank;

[0028] Retesting the actual position of the penetration includes the following steps:

[0029] The position information of two points on the outer surface of the penetration is measured to measure the actual position of the penetration.

[0030] Furthermore, step S4 further includes:

[0031] The back of the weld between the penetration piece and the water tank is filled with argon for protection, and argon arc primer is performed; the penetration piece and the water tank are welded by segmented symmetrical welding.

[0032] Furthermore, step S4 further includes:

[0033] The back of the weld between the reinforcing ring plate and the penetration piece is filled with argon for protection, and argon arc primer is performed; the reinforcing ring plate and the penetration piece are welded by segmented symmetrical welding.

[0034] Furthermore, step S0 also includes:

[0035] The back of the weld between the penetration piece and the anchor plate is filled with argon for protection, and argon arc primer is performed; the penetration piece and the anchor plate are welded by segmented symmetrical welding.

[0036] The penetration piece and water tank installation method provided by the present invention include the following steps: step S1: positioning and adjusting the water tank and the penetration piece, after the water tank and the penetration piece are adjusted to the preset positions respectively, the water tank and the penetration piece are hoisted and placed in place; step S2: measuring the actual position of the water tank, checking whether the deviation between the actual position of the water tank and the preset position of the water tank meets the first preset deviation range; measuring the actual position of the penetration piece, checking whether the deviation between the actual position of the penetration piece and the preset position of the penetration piece meets the second preset deviation range; step S3: welding the penetration piece and the water tank, welding the reinforcing ring plate and the penetration piece Perform weld joint pairing, and perform weld joint pairing on the reinforcing ring plate and the truncated cone; step S4: weld the penetration piece and the water tank, and perform non-destructive testing on the welding joints between the penetration piece and the water tank; weld the reinforcing ring plate and the penetration piece, and perform non-destructive testing on the welding joints between the reinforcing ring plate and the penetration piece; step S5: re-measure the actual position of the water tank, and check whether the deviation between the actual position of the water tank and the preset position of the water tank meets the first preset deviation range; re-measure the actual position of the penetration piece, and check whether the deviation between the actual position of the penetration piece and the preset position of the penetration piece meets the second preset deviation range; step S6: weld the reinforcing ring plate and the truncated cone. The penetration piece and water tank installation method provided by the present invention detects the actual positions of the water tank and the penetration piece after the water tank and the penetration piece are hoisted and placed in place, and the welding construction is performed after the deviation between the actual position of the water tank and the preset position of the water tank meets the first preset deviation range, and the deviation between the actual position of the penetration piece and the preset position of the penetration piece meets the second preset deviation range; and after the penetration piece and the water tank and the reinforcement ring plate and the penetration piece are welded, the actual positions of the water tank and the penetration piece are re-measured, and the deviation between the actual position of the water tank and the preset position of the water tank meets the first preset deviation range, and the deviation between the actual position of the penetration piece and the preset position of the penetration piece meets the second preset deviation range, and then the reinforcement ring plate and the truncated cone are welded. After the water tank and the penetration piece are placed in place, the positions of the water tank and the penetration piece are measured, and after the penetration piece and the water tank and the reinforcement ring plate and the penetration piece are welded, the positions of the water tank and the penetration piece are re-measured, which can improve the accuracy of the positions of the penetration piece and the water tank, thereby ensuring that the positions of the penetration piece and the water tank meet the deviation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 is a plan view of a penetration piece and a water tank in a penetration piece and a water tank installation method provided in an embodiment of the present invention;

[0039] Figure 2 It is a structural schematic diagram of a penetration piece and a water tank in a penetration piece and water tank installation method provided in an embodiment of the present invention;

[0040] Figure 3 is a distribution diagram of test points of a penetration piece and a water tank in a penetration piece and a water tank installation method provided in an embodiment of the present invention;

[0041] Figure 4 It is a flow chart of a penetration piece and a water tank installation method provided in an embodiment of the present invention.

[0042] Icons: 1-water tank; 11-measuring point of water tank; 2-penetration piece; 21-inner pipe; 22-outer pipe; 23-outer casing; 24-reinforcement ring plate; 25-anchor plate; 26-measuring point of penetration piece; 3-bottom plate inside steel lining; 4-truncated cone. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The present invention provides a penetration piece and a water tank installation method. A plurality of embodiments are given below to describe the penetration piece and the water tank installation method provided by the present invention in detail.

[0045] The penetration member and water tank installation method provided in this embodiment are as follows: Figures 1 to 4 As shown, the following steps are included:

[0046] Step S1: Position and adjust the water tank 1 and the penetration piece 2. After the water tank 1 and the penetration piece 2 are adjusted to preset positions respectively, the water tank 1 and the penetration piece 2 are hoisted and placed in place; the preset positions are determined according to the design drawings;

[0047] Step S2: measuring the actual position of the water tank 1, and checking whether the deviation between the actual position of the water tank 1 and the preset position of the water tank 1 meets the first preset deviation range;

[0048] Measuring the actual position of the penetration member 2, and checking whether the deviation between the actual position of the penetration member 2 and the preset position of the penetration member 2 meets the second preset deviation range;

[0049] Step S3: welding the penetration piece 2 and the water tank 1, welding the reinforcing ring plate 24 and the penetration piece 2, welding the reinforcing ring plate 24 and the truncated cone 4;

[0050] Step S4: welding the penetration piece 2 and the water tank 1, and performing nondestructive testing on the welding portion between the penetration piece 2 and the water tank 1; welding the reinforcing ring plate 24 and the penetration piece 2, and performing nondestructive testing on the welding portion between the reinforcing ring plate 24 and the penetration piece 2;

[0051] Step S5: re-measure the actual position of the water tank 1 to check whether the deviation between the actual position of the water tank 1 and the preset position of the water tank 1 meets the first preset deviation range;

[0052] Re-measure the actual position of the penetration member 2 to check whether the deviation between the actual position of the penetration member 2 and the preset position of the penetration member 2 meets the second preset deviation range;

[0053] Step S6: welding the reinforcing ring plate 24 and the truncated cone 4 .

[0054] The installation method of the penetration piece 2 and the water tank 1 provided in the present embodiment is as follows: after the water tank 1 and the penetration piece 2 are hoisted and put into place, the actual positions of the water tank 1 and the penetration piece 2 are detected, and the welding construction is performed after the deviation between the actual position of the water tank 1 and the preset position of the water tank 1 meets the first preset deviation range, and the deviation between the actual position of the penetration piece 2 and the preset position of the penetration piece 2 meets the second preset deviation range; and after the welding of the penetration piece 2 and the water tank 1 and the reinforcement ring plate 24 and the penetration piece 2 is completed, the actual positions of the water tank 1 and the penetration piece 2 are re-measured, and the deviation between the actual position of the water tank 1 and the preset position of the water tank 1 meets the first preset deviation range, and the deviation between the actual position of the penetration piece 2 and the preset position of the penetration piece 2 meets the second preset deviation range, and then the reinforcement ring plate 24 and the truncated cone 4 are welded. After the water tank 1 and the penetration piece 2 are in place, the positions of the water tank 1 and the penetration piece 2 are measured, and after the penetration piece 2 and the water tank 1 and the reinforcing ring plate 24 and the penetration piece 2 are welded, the positions of the water tank 1 and the penetration piece 2 are re-measured, which can improve the accuracy of the positions of the penetration piece 2 and the water tank 1, ensure the installation quality of the water tank 1 and the penetration piece 2, and thus ensure that the positions of the penetration piece 2 and the water tank 1 meet the deviation requirements. Due to the improvement of the installation quality of the water tank 1 and the penetration piece 2, the qualified rate of the installation is improved, the rework rate is reduced, and the construction period is reduced.

[0055] Specifically, the penetration piece 2 includes an inner tube 21, an outer tube 22, an outer sleeve 23, a reinforcement ring plate 24 and an anchor plate 25. The outer tube 22 is sleeved on the outside of the inner tube 21, the outer sleeve 23 is sleeved on the outside of the outer tube 22, the reinforcement ring plate 24 is sleeved on the outside of part of the outer sleeve 23, and the anchor plate 25 is sleeved on the outside of part of the outer sleeve 23.

[0056] The weld between the reinforcing ring plate 24 and the penetration piece 2 is FW8, the weld grade is 1, and FW8 adopts the heterogeneous steel fillet welding process. The weld between the penetration piece 2 and the anchor plate 25 is FW9, the weld grade is 2, and FW9 adopts the stainless steel fillet welding process. The weld between the penetration piece 2 and the embedded water tank 1 is W1, the weld grade is 2, and W1 adopts the stainless steel fillet welding process. W1, FW8 and FW9 are all single-sided groove fillet welds.

[0057] In this embodiment, the length of a single penetration piece 2 is about 15 meters, the weight of a single penetration piece 2 is about 10.2 tons, and the weight of a single water tank 1 is about 1.65 tons.

[0058] Furthermore, before step S1, the following steps are also included:

[0059] Step S0: assembling the weld joints of the penetration piece 2 and the anchor plate 25 , welding the penetration piece 2 and the anchor plate 25 , and performing nondestructive testing on the welds between the penetration piece 2 and the anchor plate 25 .

[0060] Before the penetration piece 2 is hoisted and placed in place, the penetration piece 2 is welded to the anchor plate 25. There is no need to weld the penetration piece 2 to the anchor plate 25 at the construction site, thereby reducing the difficulty of on-site construction.

[0061] Specifically, step S0 includes the following steps:

[0062] Step S01: welding the penetration piece 2 and the anchor plate 25 together, with a welding gap of 1 mm to 4 mm;

[0063] Step S02: performing argon filling protection on the back of the weld between the penetration piece 2 and the anchor plate 25, and performing argon arc primer; specifically, installing a back tracking argon filling device on the weld between the penetration piece 2 and the anchor plate 25;

[0064] Step S03: Weld the penetration piece 2 and the anchor plate 25 by segmented symmetrical welding. Specifically, the FW9 circumferential weld is divided into 12 equal parts along its circumference. Two welders perform symmetrical welding. The thickness of the weld argon arc primer does not exceed 4 mm.

[0065] Step S04: performing liquid penetration inspection on the argon arc coating layer;

[0066] Step S05: after the argon arc bottom layer liquid penetration test is qualified, the back tracking argon filling device is removed;

[0067] Step S06: welding and filling the second layer of weld seam by adopting the segmented symmetrical welding method of step S03 (manual welding);

[0068] Step S07: grinding the second layer of weld surface;

[0069] Step S08: welding and filling the third layer of weld seam by adopting the segmented symmetrical welding method of step S03 (manual welding);

[0070] Step S09: grinding the surface of the third layer of weld;

[0071] Step S010: welding and filling the final layer of welds (manual welding) by adopting the segmented symmetrical welding method of step S03;

[0072] Step S011: performing final layer weld surface grinding and liquid penetration inspection;

[0073] Step S012: Wrap the FW9 weld and protect the finished product.

[0074] Specifically, step S1 includes the following steps:

[0075] Step S11: performing secondary opening on the truncated cone 4 of the containment. Specifically, after the penetration piece 2 passes through the truncated cone 4, the penetration piece 2 is adjusted to a preset position, and after the position deviations of the two ends of the penetration piece 2, the tube body of the penetration piece 2, the truncated cone 4 and the pit meet the design requirements, the reinforcing ring plate 24 is made as close as possible to the truncated cone 4, and a secondary cutting line is drawn on the truncated cone 4 along the contour of the reinforcing ring plate 24. After the reinforcing ring plate 24 is removed, a secondary opening is performed on the truncated cone 4 according to the secondary cutting line;

[0076] Step S12: The transport trolley is put into position;

[0077] Step S13: hoisting the penetration piece 2 into place;

[0078] Step S14: hoisting the water tank 1 into place;

[0079] Step S15: inserting and adjusting the positions of the water tank 1 and the penetration piece 2.

[0080] Further, in step S2, measuring the actual position of the water tank 1 includes the following steps: measuring the position information of the center points of the four side panels of the water tank 1 to measure the actual position of the water tank 1;

[0081] Measuring the actual position of the penetration 2 comprises the following steps:

[0082] The position information of two points on the outer surface of the penetration member 2 is measured to measure the actual position of the penetration member 2 .

[0083] The two points on the outer surface of the penetration piece 2 may be any two suitable points on the outer surface of the penetration piece 2, such as any two points on the top of the penetration piece 2, or any two points on the bottom of the penetration piece 2.

[0084] In this embodiment, Figure 3As shown, the center points of the four side panels of the water tank 1 are the measuring points 11 of the water tank, and the two points on the outer surface of the penetration piece 2 are the measuring points 26 of the penetration piece 2 .

[0085] After the water tank 1 and the penetration piece 2 are hoisted and put into place, the actual positions of the water tank 1 and the penetration piece 2 are detected. When the deviation between the actual position of the water tank 1 and the preset position of the water tank 1 meets the first preset deviation range, and the deviation between the actual position of the penetration piece 2 and the preset position of the penetration piece 2 meets the second preset deviation range, welding construction can be carried out.

[0086] If the deviation between the actual position of water tank 1 and the preset position of water tank 1 does not meet the first preset deviation range, and the deviation between the actual position of penetration 2 and the preset position of penetration 2 does not meet the second preset deviation range, it is necessary to adjust the actual positions of water tank 1 and penetration 2, and adjust water tank 1 and penetration 2 until the deviation between the actual position of water tank 1 and the preset position of water tank 1 meets the first preset deviation range, and the deviation between the actual position of penetration 2 and the preset position of penetration 2 meets the second preset deviation range before welding construction is carried out.

[0087] Furthermore, during the installation of the water tank 1, the first preset deviation range includes a horizontal deviation range and a first elevation deviation range, the horizontal deviation range is ±5 mm, and the first elevation deviation range is ±5 mm;

[0088] During the installation of the penetration member 2, the second preset deviation range includes an axis deviation range and a second elevation direction deviation range, the axis deviation range is ±30 mm, and the second elevation direction deviation range is ±15 mm.

[0089] In addition, before construction, ensure that the personnel and machinery are equipped to meet the needs of the site. Before the penetration member 2 is installed on site, the flange and the anchor plate 25 are put on the penetration member 2 in advance, and the penetration member 2 and the anchor plate 25 are assembled and welded.

[0090] Further, step S3: welding the penetration piece 2 and the water tank 1 together, welding the reinforcing ring plate 24 and the penetration piece 2 together, welding the reinforcing ring plate 24 and the truncated cone 4 together;

[0091] Specifically, welding the penetration piece 2 and the water tank 1 comprises the following steps: welding the penetration piece 2 and the water tank 1 with a welding gap of 1 mm to 4 mm, and fixing the welding of the penetration piece 2 and the water tank 1 with a fixing block.

[0092] The welding joint pairing of the reinforcing ring plate 24 and the penetration piece 2 includes the following steps: adjusting the position of the reinforcing ring plate 24 so that the gap between the inner ring of the reinforcing ring plate 24 and the penetration piece 2 is uniform, welding the reinforcing ring plate 24 and the penetration piece 2 together, the pairing gap is 1mm-4mm, and the welding joint pairing of the reinforcing ring plate 24 and the penetration piece 2 is fixed using a fixing block.

[0093] The welding joint pairing of the reinforcing ring plate 24 and the truncated cone 4 includes the following steps: adjusting the gap between the reinforcing ring plate 24 and the truncated cone 4 so that the gap between the reinforcing ring plate 24 and the truncated cone 4 is 1mm-4mm, and using a horse plate to fix the welding joint of the reinforcing ring plate 24 and the truncated cone 4 on both sides.

[0094] Furthermore, after the penetration piece 2 and the water tank 1 are welded together, the reinforcement ring plate 24 and the penetration piece 2 are welded together, and the reinforcement ring plate 24 and the truncated cone 4 are welded together, step S3 also includes the following steps: placing a counterweight block on the top of the water tank 1.

[0095] In order to prevent the welds between the reinforcing ring plate 24 and the penetration piece 2 and between the penetration piece 2 and the embedded water tank 1 from being deformed due to heat during and after welding, resulting in displacement of the water tank 1 and the penetration piece 2, a counterweight should be added to the top of the water tank 1 before welding the reinforcing ring plate 24 and the penetration piece 2 and the penetration piece 2 and the embedded water tank 1.

[0096] Further, placing a counterweight on the top of the water tank 1 includes the following steps:

[0097] A plate is laid on the top of the water tank 1 ; a counterweight is placed on the plate, the weight of the counterweight being 2.8 tons to 3.2 tons; and a guardrail is set up around the water tank 1 .

[0098] Laying a plate on the top of the water tank 1 can prevent the counterweight from damaging the water tank 1. The plate can be a wooden board or a rubber board.

[0099] The weight of the counterweight can be any suitable weight such as 2.8 tons, 3 tons or 3.2 tons. After the counterweight is placed on the top of the water tank 1, it is necessary to set up guardrails around the water tank 1 to prevent personnel from approaching the water tank 1.

[0100] Further, in step S4, welding the penetration piece 2 and the water tank 1 includes the following steps:

[0101] Step S41: performing argon filling protection on the back of the weld between the penetration piece 2 and the water tank 1, and performing argon arc primer;

[0102] Specifically, step S411: before welding the weld between the penetration piece 2 and the water tank 1, a back tracking argon filling device is installed on the back; wherein, the back tracking argon filling device adopts a pot-lid-shaped stainless steel plate, and the pot-lid-shaped stainless steel plate has a hole in the middle, and the pot-lid-shaped stainless steel plate passes through the penetration piece 2 through the middle hole, the outer edge of the pot-lid-shaped stainless steel plate is in close contact with the wall of the water tank 1, and the inner edge of the pot-lid-shaped stainless steel plate is in close contact with the penetration piece 2, and is sealed with a stainless steel tape to ensure the airtightness during argon filling; the argon filling pipe is connected to an interface on the argon filling device to realize the back argon filling protection;

[0103] Step S412: The weld between the penetration piece 2 and the water tank 1 is primed with argon arc, and the primer thickness does not exceed 4 mm. The welding method adopts segmented symmetrical welding, and the circumferential weld between the penetration piece 2 and the water tank 1 is divided into 12 equal parts along its circumference. Two welders perform symmetrical welding; welding is performed from bottom to top during the welding process.

[0104] Step S42: welding the penetration piece 2 and the water tank 1 by means of segmented symmetrical welding, and performing nondestructive testing on the welding point between the penetration piece 2 and the water tank 1;

[0105] Specifically, step S421: before welding, check the weld gap between the penetration piece 2 and the water tank 1, and perform welding after the gap meets the design requirements;

[0106] Step S422: welding the penetration piece 2 and the water tank 1 by segmented symmetrical welding. Specifically, the circumferential weld between the penetration piece 2 and the water tank 1 is evenly divided into 12 equal parts along its circumference. Two welders perform symmetrical welding and weld the argon arc primer. The thickness of the argon arc primer of the weld does not exceed 4 mm.

[0107] Step S423: performing liquid penetration inspection on the argon arc coating layer;

[0108] Step S424: after the argon arc base layer liquid penetration test is qualified, the second layer weld is welded and filled (manual welding) by adopting the segmented symmetrical welding method of step S422;

[0109] Step S425: grinding the second layer of weld surface;

[0110] Step S426: welding and filling the third layer of weld seam by adopting the segmented symmetrical welding method of step S422 (manual welding);

[0111] Step S427: grinding the surface of the third layer of weld;

[0112] Step S428: welding and filling the fourth layer of weld seam by adopting the segmented symmetrical welding method of step S422 (manual welding);

[0113] Step S429: grinding the surface of the fourth layer weld; performing liquid penetration inspection on the fourth layer weld;

[0114] Step S4210: After the fourth layer weld is qualified by liquid penetration test, the segmented symmetrical welding method of step S422 is adopted to weld and fill the final layer weld (manual welding);

[0115] Step S4211: Liquid penetrant inspection of the final layer weld;

[0116] Step S4212: After the final layer of welds are qualified by liquid penetration test, the welds between the penetration piece 2 and the water tank 1 are wrapped and the finished product is protected.

[0117] Further, step S4 includes step S43: welding the reinforcing ring plate 24 and the penetration piece 2, and performing nondestructive testing on the welding point between the reinforcing ring plate 24 and the penetration piece 2;

[0118] Specifically, step S431: before welding, check the gap between the reinforcing ring plate 24 and the penetration piece 2, and perform welding after the gap meets the design requirements;

[0119] Step S432: the back of the weld between the reinforcing ring plate 24 and the penetration piece 2 is filled with argon for protection, and argon arc primer is performed; specifically, a back tracking argon filling device is installed on the back of the weld between the reinforcing ring plate 24 and the penetration piece 2, and the argon filling belt is inserted into the 10mm gap between the truncated cone 4 and the tube body of the penetration piece 2 according to the position of the weld between the reinforcing ring plate 24 and the penetration piece 2, and the gap is wrapped with a stainless steel tape to ensure the airtightness of the argon filling; the welding method adopts a segmented symmetrical welding method, and the circumferential weld between the reinforcing ring plate 24 and the penetration piece 2 is evenly divided into 12 equal parts along its circumference. Two welders perform symmetrical welding, and the welding argon arc primer is performed, and the thickness of the weld argon arc primer does not exceed 4mm;

[0120] Step S433: performing liquid penetration inspection on the argon arc coating layer;

[0121] Step S434: After the argon arc bottom layer liquid penetration test is qualified, the back tracking argon filling device is removed, and the second layer weld is welded and filled (manual welding) by the segmented symmetrical welding method of step S432;

[0122] Step S435: grinding the second layer of weld surface;

[0123] Step S436: welding and filling the third layer of weld seam by adopting the segmented symmetrical welding method of step S432 (manual welding);

[0124] Step S437: grinding the surface of the third layer of weld;

[0125] Step S438: welding and filling the fourth layer of weld seam by adopting the segmented symmetrical welding method of step S432 (manual welding);

[0126] Step S439: grinding the surface of the fourth layer weld; performing liquid penetration inspection on the fourth layer weld;

[0127] Step S4310: After the fourth layer weld is qualified by liquid penetration test, the segmented symmetrical welding method of step S432 is adopted to weld and fill the final layer weld (manual welding);

[0128] Step S4311: Liquid penetrant inspection of the final layer weld;

[0129] Step S4312: After the final layer of welds are qualified by liquid penetration test, the welds between the reinforcing ring plate 24 and the penetration piece 2 are wrapped and the finished product is protected.

[0130] In step S5, the actual position of the water tank 1 is re-measured to check whether the deviation between the actual position of the water tank 1 and the preset position of the water tank 1 meets the first preset deviation range;

[0131] Re-measure the actual position of the penetration member 2 to check whether the deviation between the actual position of the penetration member 2 and the preset position of the penetration member 2 meets the second preset deviation range;

[0132] The two points on the outer surface of the penetration piece 2 may be any two suitable points on the outer surface of the penetration piece 2, such as any two points on the top of the penetration piece 2, or any two points on the bottom of the penetration piece 2.

[0133] After step S4, the actual positions of the water tank 1 and the penetration piece 2 are detected. When the deviation between the actual position of the water tank 1 and the preset position of the water tank 1 meets the first preset deviation range, and the deviation between the actual position of the penetration piece 2 and the preset position of the penetration piece 2 meets the second preset deviation range, step S6 welding construction is performed.

[0134] If the deviation between the actual position of water tank 1 and the preset position of water tank 1 does not meet the first preset deviation range, and the deviation between the actual position of penetration 2 and the preset position of penetration 2 does not meet the second preset deviation range, it is necessary to adjust the actual positions of water tank 1 and penetration 2, and adjust water tank 1 and penetration 2 until the deviation between the actual position of water tank 1 and the preset position of water tank 1 meets the first preset deviation range, and the deviation between the actual position of penetration 2 and the preset position of penetration 2 meets the second preset deviation range, and then perform step S6 welding construction.

[0135] When re-measuring the actual position of the water tank 1, the first preset deviation range includes a horizontal deviation range and a first elevation deviation range, the horizontal deviation range is ±5 mm, and the first elevation deviation range is ±5 mm;

[0136] When re-measuring the actual position of the penetration member 2, the second preset deviation range includes an axis deviation range and a second elevation direction deviation range, the axis deviation range is ±30 mm, and the second elevation direction deviation range is ±15 mm.

[0137] Further, step S6: welding the reinforcing ring plate 24 and the truncated cone 4. Specifically, the weld between the reinforcing ring plate 24 and the truncated cone 4 is a butt weld; the welding should be carried out in a bottom-up order, and the welding adopts symmetrical welding points; the horse plate between the reinforcing ring plate 24 and the truncated cone 4 should be removed when welding to the corresponding position, and the horse plate for the position that has not been welded should be temporarily retained; the non-destructive testing of the welding point between the reinforcing ring plate 24 and the truncated cone 4 adopts 100% RT and 100% PT inspection.

[0138] There are multiple penetration pieces 2 and water tanks 1, and the multiple water tanks 1 are arranged one by one with the multiple penetration pieces 2. The penetration pieces 2 and the water tanks 1 are installed on the bottom plate 3 of the steel lining, and the multiple penetration pieces 2 are arranged at intervals along the circumference of the bottom plate 3 of the steel lining, and the multiple water tanks 1 are arranged at intervals along the circumference of the bottom plate 3 of the steel lining.

[0139] The installation method of the penetration piece 2 and the water tank 1 provided in the present embodiment increases the measurement after the lifting and placement and during the construction process, so that the positions of the penetration piece 2 and the water tank 1 meet the deviation requirements. In the welding construction, the welding deformation is minimized to the greatest extent through the segmented symmetrical welding method, and the rework and repair are avoided. Through the installation method of the penetration piece 2 and the water tank 1 provided in the present embodiment, the welding of the FW9, FW8, and W1 welds and the measurement of the embedded water tank 1 and the penetration piece 2 can be successfully completed within 21 days, and the first-time qualified rate reaches 100%. Compared with the existing estimated construction period, the construction period can be shortened by 15 days, reducing the safety hazards caused by the cross-construction with civil engineering.

[0140] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A penetration piece and a water tank installation method, characterized in that: The following steps are involved: Step S1: Position and adjust the water tank and the penetration piece. After the water tank and the penetration piece are adjusted to preset positions respectively, the water tank and the penetration piece are hoisted and placed in place; Step S2: measuring the actual position of the water tank, and checking whether the deviation between the actual position of the water tank and the preset position of the water tank meets the first preset deviation range; Measuring the actual position of the penetration member, and checking whether the deviation between the actual position of the penetration member and the preset position of the penetration member meets the second preset deviation range; Step S3: pairing the welds between the penetration piece and the water tank, pairing the welds between the reinforcing ring plate and the penetration piece, and pairing the welds between the reinforcing ring plate and the truncated cone; Step S4: welding the penetration piece and the water tank, and performing nondestructive testing on the welding portion between the penetration piece and the water tank; welding the reinforcing ring plate and the penetration piece, and performing nondestructive testing on the welding portion between the reinforcing ring plate and the penetration piece; Step S5: re-measure the actual position of the water tank to check whether the deviation between the actual position of the water tank and the preset position of the water tank meets the first preset deviation range; Re-measure the actual position of the penetration component to check whether the deviation between the actual position of the penetration component and the preset position of the penetration component meets the second preset deviation range; Step S6: welding the reinforcing ring plate and the truncated cone.

2. The penetration piece and water tank installation method according to claim 1, characterized in that: Before step S1, the following steps are also included: Step S0: assembling the weld joints of the penetration piece and the anchor plate, welding the penetration piece and the anchor plate, and performing nondestructive testing on the welds between the penetration piece and the anchor plate.

3. The penetration piece and water tank installation method according to claim 1, characterized in that: Step S3 also includes the following steps: placing a counterweight on the top of the water tank.

4. The penetration piece and water tank installation method according to claim 3, characterized in that: Placing the weights on top of the tank involves the following steps: Lay a plate on the top of the water tank; place a counterweight on the plate, the weight of the counterweight is 2.8 tons - 3.2 tons; set up guardrails around the water tank.

5. The penetration piece and water tank installation method according to claim 1, characterized in that: Measuring the actual location of the water tank involves the following steps: Measure the position information of the center points of the four side panels of the water tank to measure the actual position of the water tank; Measuring the actual position of a penetration involves the following steps: The position information of two points on the outer surface of the penetration is measured to measure the actual position of the penetration.

6. The penetration piece and water tank installation method according to claim 1, characterized in that: The first preset deviation range includes a horizontal deviation range and a first elevation deviation range, the horizontal deviation range is ±5 mm, and the first elevation deviation range is ±5 mm; The second preset deviation range includes an axis deviation range and a second elevation direction deviation range, the axis deviation range is ±30 mm, and the second elevation direction deviation range is ±15 mm.

7. The penetration piece and water tank installation method according to claim 1, characterized in that: Retesting the actual location of the water tank includes the following steps: Measure the position information of the center points of the four side panels of the water tank to measure the actual position of the water tank; Retesting the actual position of the penetration includes the following steps: The position information of two points on the outer surface of the penetration is measured to measure the actual position of the penetration.

8. The penetration piece and water tank installation method according to claim 1, characterized in that: Step S4 also includes: The back of the weld between the penetration piece and the water tank is filled with argon for protection, and argon arc primer is performed; the penetration piece and the water tank are welded by segmented symmetrical welding.

9. The penetration piece and water tank installation method according to claim 1, characterized in that: Step S4 also includes: The back of the weld between the reinforcing ring plate and the penetration piece is filled with argon for protection, and argon arc primer is performed; the reinforcing ring plate and the penetration piece are welded by segmented symmetrical welding.

10. The penetration piece and water tank installation method according to claim 2, characterized in that: Step S0 also includes: The back of the weld between the penetration piece and the anchor plate is filled with argon for protection, and argon arc primer is performed; the penetration piece and the anchor plate are welded by segmented symmetrical welding.

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