A groove load test device and method for a nuclear power plant containment vessel

Abstract

The present application discloses a groove load test device and method for a closed container of a nuclear power plant, which relates to the field of load testing technology. The device and method include a stand, which is arranged on the ground; a top beam, which is arranged on the top of the stand; at least two pressure sensors, which are arranged at the bottom of the stand; at least two support columns, wherein the multiple support columns are respectively arranged on the multiple pressure sensors, and the tops of the multiple support columns are respectively fitted with the inner surfaces of the multiple grooves of the container; an auxiliary support mechanism, which is arranged at the bottom of the stand; a lateral support mechanism, which is arranged inside the stand; and a top cover, which is arranged at the top of the container. The present application utilizes the auxiliary support mechanism and the lateral support mechanism. When performing a load test on the groove of the container, there is no need to weld the container. At the same time, the auxiliary support mechanism and the lateral support mechanism support the container, making it less likely for the container to tilt during the test, thereby improving the safety of the container groove load test.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of load test, in particular to a groove load test device and method for a nuclear power plant closed container. BACKGROUND

[0002] With the gradual increase of the manufacturing output of spent fuel transport containers in China, the domestic manufacturers have more and more experience in the key manufacturing process of the spent fuel transport containers, and the groove load test of the spent fuel transport container is one of the important tests for verifying the function of the container, which is used to verify whether the manufacturing quality of the grooves on both sides of the container meets the design and use requirements.

[0003] At present, the conventional test method mainly welds a fixing seat under the grooves of the container (i.e. at the bottom position of the container), places a jack and a pressure sensor on the fixing seat, and uses the jack to apply a load to the grooves for test. The disadvantages of this method are as follows: first, the welding amount is large, and the welding on the container is easy to affect the container; second, the applied load is large, and the contact area is small, which may cause safety hazards. SUMMARY

[0004] In order to improve the safety of the groove load test of the container and reduce the influence on the container caused by welding, the present application provides a groove load test device and method for a nuclear power plant closed container.

[0005] In a first aspect, the present application provides a groove load test device for a nuclear power plant closed container, which adopts the following technical solution:

[0006] A groove load test device for a nuclear power plant closed container, comprising a rack arranged on the ground, a container arranged in the rack, a top beam arranged at the top of the rack, at least two pressure sensors arranged at the bottom of the rack, at least two support columns, a plurality of support columns arranged on a plurality of pressure sensors, and the top of the plurality of support columns being respectively matched with the inner surfaces of a plurality of grooves of the container, an auxiliary support mechanism arranged at the bottom of the rack for assisting in fixing the support columns and the pressure sensors, a lateral support mechanism arranged in the rack for wrapping and supporting the container along the radial direction of the container, and a top cover arranged at the top of the container.

[0007] A pressure applying member is arranged above the middle part of the top cover, and the top end of the pressure applying member abuts against the middle part of the bottom wall of the top beam.

[0008] By adopting the technical scheme, when the load test is performed on the grooves of the container, the container is first placed in the rack, the auxiliary supporting mechanism is adjusted, the supporting columns and the pressure sensor are moved to below the grooves, the container is slowly lowered and the plurality of supporting columns are clamped in the plurality of grooves, the lateral supporting mechanism is used to support and wrap the container along the radial direction of the container, the top cover is placed on the top of the container, the pressure applying piece is used to apply pressure to the container, and then the groove load test can be performed. In this way, when the load test is performed on the grooves of the container, the container does not need to be welded, and the auxiliary supporting mechanism and the lateral supporting mechanism support the container, so that the container is not easy to tilt during the test, thereby improving the safety of the container groove load test.

[0009] Preferably, the lateral supporting mechanism comprises two groups of lateral bottom plates, a baffle, a supporting box, a first guide pipe, a first guide rod, an advancing bolt and a retreating bolt, the two groups of lateral bottom plates are fixedly arranged in the rack and located on the symmetric two sides of the radial direction of the container, the baffle is fixedly arranged on the lateral bottom plate, the supporting box is slidingly arranged on the side of the baffle close to the container along the radial direction of the container, the side of the supporting box away from the baffle abuts against the outer wall of the container, the first guide rod is arranged on the baffle, the first guide pipe is fixedly arranged in the supporting box, the first guide rod is slidingly arranged in the first guide pipe, the advancing bolt is rotationally arranged in the baffle and used for pushing the supporting box to move towards the container, and the retreating bolt is rotationally arranged in the baffle and used for pulling the supporting box to move away from the container.

[0010] By adopting the technical scheme, when the container is placed, the retreating bolt is rotated to drive the two supporting boxes to move away from each other, after the container is placed, the advancing bolt is rotated to drive the two supporting boxes to move towards each other, and the side of the two supporting boxes close to each other clamps and supports the container along the radial direction of the container, thereby improving the stability of the container during the test, and the supporting box can slide along the radial direction of the container, so that the lateral supporting mechanism can be suitable for containers of different sizes.

[0011] Preferably, the auxiliary supporting mechanism comprises at least two groups of bases, a second guide pipe, a second guide rod, a moving bolt and a push plate, the plurality of bases are fixedly arranged on the bottom of the rack and arranged at equal intervals along the circumferential direction of the container, the second guide pipe is fixedly arranged on the base, the second guide rod is slidingly arranged in the second guide pipe, the push plate is fixedly arranged at the end of the second guide rod close to the supporting column, and the moving bolt is rotationally arranged in the base and used for pushing the push plate to move and abut against the supporting column.

[0012] By adopting the above technical scheme, when the container is placed, the moving bolt is rotated, the moving bolt drives the push plate to move towards the container, the push plate drives the support column to move to the position directly below the groove, then the container is slowly placed, the support column is inserted into the groove, and the two push plates clamp the support column, so that the stability of the container during the test is further improved, and meanwhile, the push plate drives the support column to slide along the radial direction of the container, so that the auxiliary support mechanism can be applied to containers of different sizes.

[0013] Preferably, a third guide pipe is fixedly arranged in the base, a third guide rod is slidably arranged in the third guide pipe, a clamping plate is fixedly arranged at the end of the third guide rod close to the support column, two clamping plates are arranged on the two sides of the support column, clamping bolts are rotatably arranged on the base on the opposite sides of the support column, and the clamping bolts are used to drive the clamping plates to move towards the support column.

[0014] By adopting the above technical scheme, after the support column is inserted into the groove, the clamping bolts are rotated, the clamping bolts drive the two clamping plates to move towards each other, the two clamping plates move and clamp the support column, so that the stability of the support column is improved.

[0015] Preferably, an insertion block is fixedly arranged at the bottom end of the support column, and the insertion block is inserted into the pressure sensor.

[0016] By adopting the above technical scheme, when the push plate drives the support column to move, the support column drives the pressure sensor to move synchronously through the insertion block, so that the support column can be located directly above the pressure sensor during the movement of the support column, and the test result is more accurate.

[0017] Preferably, the rack comprises an upper frame body and a lower frame body, the lower frame body is placed on the ground, the auxiliary support mechanism is arranged at the bottom of the lower frame body, the lateral support mechanism is arranged in the middle of the lower frame body, the upper frame body is detachably arranged at the top end of the lower frame body, the top beam is arranged in the upper frame body, personnel walkways are fixedly arranged on the outer circumferential sides of the upper frame body and the lower frame body, a staircase is arranged on the outer circumferential side of the rack, and the staircase is connected to the two personnel walkways and the bottom of the lower frame body.

[0018] By adopting the above technical scheme, the rack is assembled in a split mode, so that the height limit is better avoided during the transfer and transportation of the device, and the staircase and the personnel walkways facilitate the support and test of the container by the workers.

[0019] Preferably, a workbench is fixedly arranged at the bottom of the lower frame body, the auxiliary support mechanism is arranged on the workbench, a plurality of support seats are fixedly arranged at the bottom of the workbench, the plurality of support seats are located below the plurality of pressure sensors, and connecting rods are connected between the plurality of support seats.

[0020] By adopting the technical scheme, the support seats support the plurality of support columns, the stability of the container during testing is improved, and the plurality of support seats are connected by the connecting rods to form a force whole, and the support effect of the support seats is further improved.

[0021] Preferably, a plurality of hooks are fixedly arranged in the upper frame body and the lower frame body.

[0022] By adopting the technical scheme, the worker can hang the safety belt on the hook during work, and the safety of the work of the worker can be improved.

[0023] Preferably, a containing groove is formed in the top wall of the top cover, the bottom of the pressure applying piece is located in the containing groove, and a step is formed in the bottom wall of the top cover.

[0024] By adopting the technical scheme, the pressure applying piece is placed in the containing groove, and the pressure applying piece is prevented from sliding during testing. The step in the bottom of the top cover enables the top cover to be clamped into the open end of the container, the top cover is prevented from being displaced during testing, and the structural strength of the top plate is increased.

[0025] In a second aspect, the application provides a groove load test method for a nuclear power plant closed container, which adopts the following technical scheme:

[0026] A groove load test method for a nuclear power plant closed container, which adopts the above-mentioned groove load test device for a nuclear power plant closed container, and includes the following steps:

[0027] S1: The rack is fixedly placed on the ground, and the auxiliary support mechanism and the lateral support mechanism are separated to the maximum distance;

[0028] S2: The container is lifted by a crane and placed above the bottom of the rack, the position of the auxiliary support mechanism is adjusted, the support column and the pressure sensor are located directly below the groove of the container, and the sensor reading is zeroed;

[0029] S3: The container is slowly vertically lowered until the support column is clamped in the groove;

[0030] S4: The lateral auxiliary support mechanism is adjusted to surround the outer circle of the container and is fastened to ensure that the container is vertical;

[0031] S5: The top cover is hoisted and placed on the top of the container, and the pressure applying piece is placed on the top cover;

[0032] S6: The top beam is hoisted and installed on the rack;

[0033] S7: The pressure sensor reading Q1 is observed, the test load Q is equal to the sensor reading Q1, and the additional applied load Q2 is equal to the sensor reading Q1; the pressure applying piece is slowly loaded, and the sensor reading reaches the test load Q.

[0034] S8: After the sensor reading reaches the test load Q and remains for a period of time, the load is removed, the container is stably placed on the bottom of the rack, and the corresponding position of the groove is non-destructively tested to verify the test results.

[0035] In summary, the present application includes at least one of the following beneficial technical effects:

[0036] 1. By using the auxiliary support mechanism and the lateral support mechanism, the container does not need to be welded during the load test of the groove of the container, and the auxiliary support mechanism and the lateral support mechanism support the container, so that the container is not easy to tilt during the test, thereby improving the safety of the container groove load test;

[0037] 2. By means of the clamping bolt and the clamping plate, after the supporting column is inserted into the groove, the clamping bolt is rotated, the clamping bolt drives the two clamping plates to move towards each other, and the two clamping plates move and clamp the supporting column, thereby improving the stability of the supporting column;

[0038] 3. By means of the insert block, when the push plate drives the supporting column to move, the supporting column drives the pressure sensor to move synchronously through the insert block, so that the supporting column can always be located directly above the pressure sensor during movement, thereby making the test result more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is a schematic diagram of the principle structure of the groove load test device for the closed container of the nuclear power station in Embodiment 1 of the present application;

[0040] Figure 2 It is a schematic diagram of the overall structure of the groove load test device for the closed container of the nuclear power station in Embodiment 1 of the present application;

[0041] Figure 3 It is a schematic diagram of the partial structure of the groove load test device for the closed container of the nuclear power station in Embodiment 1 of the present application;

[0042] Figure 4 It is a schematic diagram of the partial structure of the groove load test device for the closed container of the nuclear power station in Embodiment 1 of the present application, which highlights the pressure applying member;

[0043] Figure 5 It is a schematic diagram of the partial structure of the groove load test device for the closed container of the nuclear power station in Embodiment 1 of the present application, which highlights the support seat;

[0044] Figure 6 It is an exploded view of the partial structure of the groove load test device for the closed container of the nuclear power station in Embodiment 1 of the present application;

[0045] Figure 7 A partial structural top view of a groove load test device for a closed container in a nuclear power plant in Example 1 of the present application;

[0046] Figure 8 This is a partial structural diagram of the groove load test device for a closed container of a nuclear power plant in Example 1 of the present application, highlighting the auxiliary support mechanism;

[0047] Figure 9 This is a partial structural diagram of the groove load test device for a closed container of a nuclear power plant in Example 1 of the present application, highlighting the splint;

[0048] Figure 10 This is a partial structural diagram of the groove load test device for a closed container of a nuclear power plant in Example 1 of the present application, highlighting the lateral support mechanism;

[0049] Figure 11 This is a flow chart of the groove load test method for a closed container in a nuclear power plant in Example 2 of the present application.

[0050] Figure numerals: 1, container; 2, groove; 3, stand; 31, upper frame; 32, lower frame; 4, pressure sensor; 5, support column; 6, auxiliary support mechanism; 61, base; 62, second guide tube; 63, second guide rod; 64, moving bolt; 65, push plate; 7, lateral support mechanism; 71, lateral bottom plate; 72, baffle; 73, support box; 74, first guide tube; 75, first guide rod; 76, front Incoming bolt; 77, retracting bolt; 8, top cover; 9, pressure piece; 10, third guide tube; 11, third guide rod; 12, clamping plate; 13, clamping bolt; 14, insert block; 15, personnel walkway; 16, escalator; 17, workbench; 18, support seat; 19, connecting rod; 20, hook; 21, receiving groove; 22, step; 23, rubber pad; 24, limit block; 25, display; 26, top beam; 27, connecting flange. DETAILED DESCRIPTION

[0051] The following is combined with Figures 1-11 This application is described in further detail.

[0052] Example 1:

[0053] The embodiment of the present application discloses a groove load testing device for a closed container of a nuclear power plant.

[0054] Reference Figure 1 A groove load test device for a closed container in a nuclear power plant includes a stand 3, a top beam 26, a pressure sensor 4, a display 25, a support column 5, an auxiliary support mechanism 6, a lateral support mechanism 7, a top cover 8 and a pressure member 9. The stand 3 is placed on the ground, and the container 1 is hoisted into the stand 3 by a crane.

[0055] With reference to Figure 2 and Figure 3 , the rack 3 is composed of an upper rack body 31 and a lower rack body 32, the lower rack body 32 is placed on the ground, the top of the lower rack body 32 and the bottom of the upper rack body 31 are detachably fixedly connected through a connecting flange 27, and a rib plate is fixedly installed on the connecting flange 27. The rack 3 adopts a split assembly form, which better avoids height limit and over-limit restriction during device transfer and transportation. The rib plate increases the structural strength of the connecting flange 27, and at the same time, the rack 3 adopts an upper and lower assembly form, so when the height of the container 1 is too high, only the height of the upper rack body 31 needs to be increased.

[0056] With reference to Figure 4 and Figure 5 , the bottom of the lower rack body 32 is fixedly installed with a workbench 17, two support seats 18 are fixedly installed on the bottom wall of the workbench 17, and a connecting rod 19 is fixedly installed between the two support seats 18. The support seat 18 supports the plurality of support columns 5, improving the stability of the container 1 during testing, and at the same time, the connecting rod 19 connects the two support seats 18 to form a force whole, further improving the support effect of the support seat 18.

[0057] With reference to Figure 1 , Figure 5 and Figure 6 , the pressure sensor 4 is placed on the workbench 17, and the support column 5 is placed on the pressure sensor 4. The pressure sensor 4 and the support column 5 are both placed with two, and the two pressure sensors 4 are respectively located directly above the two support seats 18, and the two support columns 5 are respectively located directly above the two pressure sensors 4. The display 25 is electrically connected with the pressure sensor 4, and is used for displaying the pressure value.

[0058] A lifting eye hole is formed in the support column 5 for lifting use. The support column 5 is in a form of narrow at the top and wide at the bottom, and the top is in a circular arc shape. When the container 1 is placed in the rack 3, the upper half of the support column 5 is clamped into the groove 2 and is in close contact with the inner surface of the groove 2. The two support columns 5 can support the container 1 through the two grooves 2, so that the container 1 is in a suspended state, and the load borne by the groove 2 is transmitted to the pressure sensor 4 below. The form of narrow at the top and wide at the bottom can ensure uniform distribution of the load, increase the force bearing area at the bottom, and at the same time, play a good supporting role.

[0059] With reference to Figure 3 and Figure 4The auxiliary support mechanism 6 is installed on the workbench 17, and is used to drive and limit the two support columns 5 and the pressure sensor 4. The lateral support mechanisms 7 are installed in the lower frame 32, and two lateral support mechanisms 7 are installed along the axial direction of the container 1, and are used to support and limit the container 1 along the radial direction of the container 1.

[0060] The top beam 26 is fixedly installed at the top end of the upper frame 31, the top cover 8 is placed at the top end of the container 1, and the pressure applying piece 9 is placed in the middle part of the top wall of the top cover 8. In the application, the pressure applying piece 9 can be selected as the pressure applying piece 9, and the top end of the pressure applying piece 9 abuts against the middle part of the bottom wall of the top beam 26. The main body of the top beam 26 is an I-shaped steel, double lifting lugs are installed on the top wall of the top beam 26, connecting holes are formed at both ends of the top beam 26 in the length direction, structural rib plates are uniformly distributed in the inside of the top beam 26, and webs are arranged on both sides to increase the structural strength of the top beam 26.

[0061] Referring to Figure 1 and Figure 3 When the load test is performed on the grooves 2 of the container 1, the container 1 is hoisted and placed into the rack 3 by using a crane. The auxiliary support mechanism 6 is adjusted to drive the two support columns 5 and the pressure sensor 4 to move to the lower side of the two grooves 2, and the crane slowly lowers the container 1 so that the top ends of the two support columns 5 are clamped in the two grooves 2. The two support columns 5 and the pressure sensor 4 are first limited by using the adjusting auxiliary mechanism, and then the container 1 is wrapped and supported along the radial direction of the container 1 by using the lateral support mechanisms 7.

[0062] The top cover 8 is placed on the top of the container 1, the pressure applying piece 9 is placed on the top cover 8, the container 1 is pressed by using the pressure applying piece 9, the top end of the pressure applying piece 9 abuts against the top beam 26, and the load test on the grooves 2 can be performed. At this time, the self weight of the container 1 is used as a part of the load, which can reduce the applied load of the pressure applying piece 9, thereby reducing the influence of the load on the container 1. In this way, when the load test is performed on the grooves 2 of the container 1, the container 1 does not need to be welded, and the container 1 is supported by the auxiliary support mechanism 6 and the lateral support mechanisms 7, so that the container 1 is not easy to incline during the test, thereby improving the safety of the load test on the grooves of the container 1.

[0063] Referring to Figure 2 and Figure 3The overall shape of the upper frame body 31 and the lower frame body 32 is square, and the outer periphery of the upper frame body 31 and the lower frame body 32 is fixedly installed with personnel walkways 15. The outer periphery of the gantry 3 is fixedly installed with escalators 16, the escalators 16 are connected between the two personnel walkways 15, and the bottom of the escalators 16 is located at the bottom of the lower frame body 32. The escalators 16 and the personnel walkways 15 facilitate the support and testing of the container 1 by the staff. A plurality of hooks 20 are fixedly installed in the upper frame body 31 and the lower frame body 32. When working, the staff hangs the safety belt on the hook 20, thereby improving the safety of the staff's work.

[0064] Referring to Figure 7 and Figure 8 , specifically, the auxiliary support mechanism 6 includes two bases 61, a push plate 65, four second guide pipes 62, a second guide rod 63, and a moving bolt 64. Each base 61, push plate 65, two second guide pipes 62, second guide rod 63, and moving bolt 64 form a group structure, and two group structures are installed on the workbench 17 and located above the two pressure sensors 4.

[0065] In one group structure, the base 61 is fixedly installed on the workbench 17, the base 61 is shaped like a Chinese character and covers the outer side of the support column 5 away from the container 1, the two second guide pipes 62 are fixedly installed on the inner side wall of the base 61 and located on the side of the support column 5 away from the container 1, and the two second guide rods 63 are slidingly installed in the two second guide pipes 62. The push plate 65 is fixedly installed at the end of the two second guide rods 63 close to the support column 5, and the two moving bolts 64 are threadedly rotatably installed in the base 61, and the end of the moving bolt 64 abuts against the side wall of the push plate 65 away from the support column 5.

[0066] When placing the container 1, the moving bolt 64 is rotated to drive the push plate 65 to move towards the container 1, and the push plate 65 moves to drive the second guide rod 63 to move in the second guide pipe 62, so that the push plate 65 moves more stably. The push plate 65 pushes the support column 5 to move to the position directly below the groove 2, and then the container 1 is slowly placed down, so that the support column 5 is inserted into the groove 2. The two push plates 65 clamp the support column 5, further improving the stability of the container 1 during the test. At the same time, the push plate 65 drives the support column 5 to slide along the radial direction of the container 1, so that the auxiliary support mechanism 6 can be applied to containers 1 of different sizes.

[0067] Referring to Figure 6 , the bottom end of the support column 5 is fixedly installed with an insertion block 14, and the insertion block 14 is inserted into the pressure sensor 4. When the push plate 65 drives the support column 5 to move, the support column 5 drives the pressure sensor 4 to move synchronously through the insertion block 14, so that the support column 5 can always be located directly above the pressure sensor 4 during the movement, thereby making the test result more accurate.

[0068] Referring toFigure 9 Each base 61 is fixedly installed with two third conduits 10 on both sides of the support column 5, each third conduit 10 is slidably installed with a third guide rod 11, and each side of the base 61 is fixedly installed with a clamping plate 12 near the end of the support column 5. Each base 61 is threadedly rotatably installed with a clamping bolt 13 on both sides of the support column 5, and the end of the clamping bolt 13 abuts against the side wall of the clamping plate 12 away from the support column 5.

[0069] After the support column 5 is clamped into the groove 2, the four clamping bolts 13 are rotated to move the two clamping plates 12 towards each other, the two clamping plates 12 are moved and clamped on the support column 5, which can provide auxiliary support on the side of the support column 5 and the pressure sensor 4, limit the displacement of the support column 5 and the pressure sensor 4, further improve the stability of the container 1 during testing, and play a good protection and prevention role.

[0070] Referring to Figure 6 Each support column 5 is fixedly installed with a limiting block 24 near the side of the container 1 and below the groove 2, and the limiting block 24 is arc-shaped near the side wall of the container 1. When the auxiliary moving mechanism moves the support column 5 to the positive direction of the groove 2, the support column 5 moves the limiting block 24 to abut against the outer side wall of the container 1, thereby further supporting and limiting the container 1. At the same time, the limiting block 24 is replaced according to the size of the container 1, meeting the needs of different sizes of the container 1.

[0071] Referring to Figure 7 And 10 Specifically, the lateral support mechanism 7 includes two lateral bottom plates 71, a baffle 72, a support box 73, a retreat bolt 77, four first conduits 74, a first guide rod 75, and an advance bolt 76. Each lateral bottom plate 71, baffle 72, support box 73, retreat bolt 77, two first conduits 74, first guide rod 75, and advance bolt 76 are a group of structures, and two groups of structures are installed in the lower frame body 32 and located on opposite sides of the container 1 along the radial direction of the container 1. And in the top view, the connecting lines of the two groups of structures of the lateral support mechanism 7 are perpendicular to the connecting lines of the two groups of structures of the auxiliary support mechanism 6.

[0072] In one set of structures, the lateral bottom plate 71 is triangular and fixedly installed in the lower frame body 32, the baffle plate 72 is fixedly installed on the side of the lateral bottom plate 71 close to the container 1, the support box 73 is installed on the side of the baffle plate 72 close to the container 1, and the side of the support box 73 close to the container 1 is arc-shaped. Two first guide pipes 74 are fixedly installed in the support box 73, two first guide rods 75 are slidingly installed in the two second guide pipes 62, and the two first guide rods 75 are fixedly connected with the baffle plate 72. Two advancing bolts 76 are threadedly rotatably installed in the baffle plate 72, and the ends of the two advancing bolts 76 abut against the side of the support box 73 away from the container 1. The retreating bolt 77 is threadedly rotatably installed in the support box 73, and the retreating bolt 77 threadedly penetrates the baffle plate 72.

[0073] When the container 1 is placed, rotating the retreating bolt 77 drives the two support boxes 73 to move away from each other, and after the container 1 is placed, rotating the advancing bolt 76 drives the two support boxes 73 to move towards each other, and the sides of the two support boxes 73 close to each other clamping support the container 1 along the radial direction of the container 1, so that the container 1 is in a vertical state, thereby improving the stability of the container 1 during the test. At the same time, the support box 73 can slide along the radial direction of the container 1, so that the lateral support mechanism 7 can be suitable for containers 1 of different sizes. The support box 73 is replaced according to the size of the container 1, which meets the needs of different sizes of the container 1. At the same time, the lateral support mechanism 7 can be provided with multiple pairs according to the height and weight of the container 1 to meet the needs of lateral support.

[0074] Referring to Figure 4 , a plurality of accommodating grooves 21 are formed in the middle of the top wall of the top cover 8 and the periphery, and the bottom of the pressing member 9 is located in the accommodating groove 21 to prevent the pressing member 9 from sliding during the test. When different test loads are required, two top beams 26 are added in the upper frame body 31, and four pressing members 9 are added in the four accommodating grooves 21 on the periphery of the top cover 8, and the top ends of every two pressing members 9 abut against the bottom wall of one top beam 26, so that one or more pressing members 9 can be selected as the power source for additional load.

[0075] Referring to Figure 5 , a step 22 is integrally formed on the bottom wall of the top cover 8, and a rubber pad 23 is installed on the outside of the step 22 of the bottom wall of the top cover 8. The step 22 at the bottom of the top cover 8 allows the top cover 8 to be clamped into the open end of the container 1, preventing displacement of the top cover 8 during the test, and increasing the structural strength of the top plate. The rubber pad 23 arranged at the step 22 can prevent friction between the top cover 8 and the open end face of the container 1 during the test, and better protect the end face of the container 1.

[0076] The implementation principle of the embodiment of the groove load test device for the closed container of a nuclear power plant is as follows: when the load test is performed on the container 1, the rack 3 is fixedly placed on the ground, the auxiliary support mechanism 6 and the lateral support mechanism 7 are separated to the maximum distance; the container 1 is lifted by the crane and placed above the bottom of the lower frame body 32, the position of the auxiliary support mechanism 6 is adjusted, the support column 5 and the pressure sensor 4 are located directly below the groove 2 of the container 1, and the sensor reading is zeroed; the container 1 is slowly vertically lowered until the support column 5 is clamped in the groove 2; the lateral auxiliary support mechanism 6 is adjusted to embrace the outer circle of the container 1, and the lateral auxiliary support mechanism 6 is fastened to ensure that the container 1 is vertical; the top cover 8 is hoisted and placed on the top of the container 1, the pressure applying piece 9 is placed on the top cover 8, the top beam 26 is hoisted and installed on the upper frame body 31; the load is applied through the pressure applying piece 9, the load is transmitted to the pressure sensor 4 at the bottom by the support column 5, and the reading of the display 25 is the load borne by the groove 2. In this way, during the test and preparation process, the workers can conveniently adjust, move and correct the position, thereby improving the efficiency of the test and the safety of the operation process.

[0077] Embodiment 2

[0078] The embodiment of the application discloses a groove load test method for a closed container of a nuclear power plant.

[0079] Reference Figure 11 The embodiment of the application discloses a groove load test method for a closed container of a nuclear power plant.

[0080] S1: the rack 3 is fixedly placed on the ground, and the auxiliary support mechanism 6 and the lateral support mechanism 7 are separated to the maximum distance;

[0081] S2: the container 1 is lifted by the crane and placed above the bottom of the lower frame body 32, the position of the auxiliary support mechanism 6 is adjusted, the support column 5 and the pressure sensor 4 are located directly below the groove 2 of the container 1, and the sensor reading is zeroed;

[0082] S3: the container 1 is slowly vertically lowered until the support column 5 is clamped in the groove 2;

[0083] S4: the lateral auxiliary support mechanism 6 is adjusted to embrace the outer circle of the container 1, and the lateral auxiliary support mechanism 6 is fastened to ensure that the container 1 is vertical;

[0084] S5: the top cover 8 is hoisted and placed on the top of the container 1, the pressure applying piece 9 is placed on the top cover 8, the top beam 26 is hoisted and installed on the upper frame body 31;

[0085] S6: observe the pressure sensor 4 reading Q1, test load Q-sensor reading Q1 = additional load Q2, slowly load the pressure applying member 9 to make the sensor reading reach the test load Q;

[0086] S7: after the sensor reading reaches the test load Q and remains for a period of time, unload the load, reverse the above steps, place the container 1 steadily on the workbench 17 at the bottom of the lower frame body 32, and perform non-destructive testing on the corresponding position of the recess 2 to verify the test results.

[0087] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A groove load test device for a closed container of a nuclear power plant, characterized by: include A stand (3) is arranged on the ground, and the container (1) is placed in the stand (3); A top beam (26) is provided on the top of the platform (3); At least two pressure sensors (4) are arranged at the bottom of the stand (3); at least two support columns (5), wherein the plurality of support columns (5) are respectively arranged on the plurality of pressure sensors (4), and the tops of the plurality of support columns (5) are respectively fitted with the inner surfaces of the plurality of grooves (2) of the container (1); An auxiliary support mechanism (6) is arranged at the bottom of the platform (3) and is used to assist in fixing the support column (5) and the pressure sensor (4). The auxiliary support mechanism (6) includes at least two groups of bases (61), a second conduit (62), a second guide rod (63), a movable bolt (64) and a push plate (65). Multiple groups of the bases (61) are fixedly arranged at the bottom of the platform (3) and are arranged at equal intervals along the circumference of the container (1). The second conduit (62) is fixedly arranged on the base (61). The second guide rod (63) is slidably arranged in the second conduit (62). The push plate (65) is fixedly arranged at the end of the second guide rod (63) close to the support column (5). The movable bolt (64) is rotatably arranged in the base (61) and is used to push the push plate (65). The plate (65) moves to abut against the support column (5), a third guide tube (10) is fixedly provided in the base (61), a third guide rod (11) is slidably provided in the third guide rod (10), a clamping plate (12) is fixedly provided at the end of the third guide rod (11) close to the support column (5), two clamping plates (12) are provided, and the two clamping plates (12) are respectively located on both sides of the support column (5), and clamping bolts (13) are rotatably provided on opposite sides of the support column (5) on the base (61), and the clamping bolts (13) are used to push the clamping plate (12) to move toward the support column (5), and an insert block (14) is fixedly provided at the bottom end of the support column (5), and the insert block (14) is inserted into the pressure sensor (4); A lateral support mechanism (7) is provided in the stand (3) and is used to wrap and support the container (1) along the radial direction of the container (1); A top cover (8) is provided on the top of the container (1); A pressure member (9) is arranged in the upper middle portion of the top cover (8), and the top end of the pressure member (9) abuts against the middle portion of the bottom wall of the top beam (26).

2. A groove load test device for a closed container of a nuclear power plant according to claim 1, characterized in that: The lateral support mechanism (7) comprises two groups of lateral bottom plates (71), a baffle (72), a support box (73), a first guide tube (74), a first guide rod (75), an advance bolt (76) and a retreat bolt (77). The two groups of lateral bottom plates (71) are fixedly arranged in the stand (3) and are located on both sides of the container (1) in a radially symmetrical manner. The baffle (72) is fixedly arranged on the lateral bottom plates (71). The support box (73) is arranged on a side of the baffle (72) close to the container (1) and is slidably arranged along the radial direction of the container (1). The support box (73) The side away from the baffle (72) abuts against the outer wall of the container (1), the first guide rod (75) is arranged on the baffle (72), the first conduit (74) is fixedly arranged in the support box (73), the first guide rod (75) is slidably arranged in the first conduit (74), the forward bolt (76) is rotatably arranged in the baffle (72) and is used to push the support box (73) to move toward the container (1), and the backward bolt (77) is rotatably arranged in the baffle (72) and is used to pull the support box (73) to move away from the container (1).

3. The groove load test device for a closed container of a nuclear power plant according to claim 1, characterized in that: The platform (3) includes an upper frame (31) and a lower frame (32), the lower frame (32) is placed on the ground, the auxiliary support mechanism (6) is arranged at the bottom of the lower frame (32), the lateral support mechanism (7) is arranged in the middle of the lower frame (32), the upper frame (31) is detachably arranged at the top end of the lower frame (32), the top beam (26) is arranged in the upper frame (31), and the outer peripheral sides of the upper frame (31) and the lower frame (32) are fixedly provided with a personnel walkway (15), and the outer peripheral side of the platform (3) is provided with an escalator (16), and the escalator (16) connects the two personnel walkways (15) and the bottom of the lower frame (32).

4. A groove load test device for a closed container of a nuclear power plant according to claim 3, characterized in that: A workbench (17) is fixedly provided at the bottom of the lower frame (32), the auxiliary support mechanism (6) is arranged on the workbench (17), a plurality of support seats (18) are fixedly provided at the bottom of the workbench (17), the plurality of support seats (18) are respectively located below a plurality of pressure sensors (4), and connecting rods (19) are connected between the plurality of support seats (18).

5. The groove load test device for a closed container of a nuclear power plant according to claim 3, characterized in that: A plurality of hooks (20) are fixedly arranged in both the upper frame (31) and the lower frame (32).

6. The groove load test device for a closed container of a nuclear power plant according to claim 1, characterized in that: A receiving groove (21) is provided on the top wall of the top cover (8), the bottom of the pressure member (9) is located in the receiving groove (21), and a step (22) is formed on the bottom wall of the top cover (8).

7. A groove load test method for a closed container of a nuclear power plant, characterized by: The groove load test device for a closed container of a nuclear power plant according to any one of claims 1 to 6 comprises the following steps: S1: The stand (3) is fixedly placed on the ground, and the auxiliary support mechanism (6) and the lateral support mechanism (7) are separated to the maximum distance; S2: The crane lifts the container (1) and places it above the bottom of the platform (3). The auxiliary support mechanism (6) is adjusted so that the support column (5) and the pressure sensor (4) are located directly below the groove (2) of the container (1). The sensor reading is then calibrated to zero. S3: The container (1) slowly falls vertically downward until the support column (5) is stuck in the groove (2); S4: Adjust the lateral auxiliary support mechanism (6) so that it surrounds the outer circle of the container (1) and tightens it to ensure that the container (1) is upright; S5: hoisting the top cover (8) and placing it on the top of the container (1), and placing the pressure member (9) on the top cover (8); S6: hoisting the top beam (26) and installing it on the stand (3); S7: Observe the reading Q1 of the pressure sensor (4), test load Q-sensor reading Q1 = additional applied load Q2, and slowly load the pressure member (9) until the sensor reading reaches the test load Q; S8: After the sensor reading reaches the test load Q and remains there for a period of time, the load is removed and the above steps are reversed to place the container (1) stably on the bottom of the stand (3). Non-destructive testing is then performed on the corresponding position of the groove (2) to verify the test results.

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