Nuclear waste barrel steel shelf stand column mounting and adjusting tool and method

Abstract

The invention relates to the technical field of nuclear waste treatment and storage, in particular to a nuclear waste barrel steel shelf stand column mounting and adjusting tool and method. The adjusting tool comprises a rotating piece, a fixing piece and a self-locking assembly. Nut screw threads are arranged at the two ends of the rotating piece, the screwing directions of threads of the nut screw threads are opposite, and a blocking hole is formed in the groove portion of the root between every two adjacent nut screw threads. The fixing piece comprises studs and lantern rings, the studs are installed in the nut screw threads at the two ends of the rotating piece, and the lantern rings are arranged at the ends of the studs; the self-locking assembly comprises a plugging screw and a self-locking ball, the plugging screw is installed in the plugging hole, and the self-locking ball is plugged in a matched tooth groove hole of the nut screw thread and the stud. The adjusting tool can be operated by one hand, is convenient and labor-saving, can realize fine adjustment, and does not damage the upright post.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear waste treatment and storage, and in particular to a tool and method for installing and adjusting steel shelf columns of a nuclear waste barrel. Background Art

[0002] In the field of nuclear power generation, the safe handling and storage of nuclear waste generated by nuclear power plant operation is a crucial link. With the development of nuclear energy technology and the expansion of nuclear power plant scale, how to efficiently and accurately handle and store large amounts of nuclear waste has become a technical challenge.

[0003] During the operation of nuclear power plants, radioactive solid and liquid wastes generated must comply with strict regulations and be transported to special waste treatment plants. Different methods are used to treat them according to their categories. The treated wastes are stored in special waste barrels for orderly storage, allowing them to decay naturally and reduce radioactivity. They are finally transported to designated radioactive waste disposal sites for deep geological disposal and subsequent maintenance and management.

[0004] Since radioactive substances are dangerous to human health and cause pollution to the environment, the requirements for the storage of nuclear power plant waste are extremely strict. The plants and facilities for storing waste have special requirements and strict management regulations. The construction of these plants and facilities must comply with strict management regulations, follow the drawings and technical documents, and be meticulous in construction to ensure that the construction quality meets the requirements, all functions are complete, and the performance is reliable. It can ensure that there will be no mistakes in the subsequent decades of waste treatment and storage. This is a huge and difficult challenge technically.

[0005] The waste treatment and storage facilities at the SRTF site of the demonstration project not only have to handle and store the nuclear waste generated by the operation of the two CAP1400 units, but also have to handle and store the nuclear waste generated by the subsequent operation of the four Hualong One units and the high-temperature gas-cooled reactor. Therefore, the treatment and storage capacity of the waste treatment and storage facilities at the SRTF site has been greatly improved compared with other domestic nuclear power plants. At the same time, based on the full absorption of the experience feedback on the installation, commissioning and operation of the SRTF site waste treatment and storage facilities of the AP1000 nuclear power unit project, the designers have made a lot of optimization and improvements to the waste treatment facilities at the CAP1400 nuclear power unit site, especially the waste temporary storage shelves of the 5103 waste temporary storage warehouse, which have been optimized and improved to increase the storage capacity, simplify the shelf structure, facilitate installation, and increase the volume.

[0006] The waste barrels in the 5103 plant are stored in steel barrel racks. The steel barrel rack is a mesh steel frame structure, which is a stable mesh rack formed by assembling a series of column components and horizontal support rods through cross links. By moving the large and small carts of the special crane, and extending the hard force arm of the cart up and down, the waste barrel is grabbed and moved to the middle of the square vertical channel of the rack, and the hard force arm is extended downward to drop the waste barrel to the ground along the square channel formed by the four columns. After landing smoothly, the hard force arm gripper releases the waste barrel and slowly rises, and in this way, the next waste barrel is lowered in turn. The process of lifting the waste barrel from the rack is exactly the opposite of the dropping procedure.

[0007] There are 1,568 waste barrels in the medium and low-level areas, covering an area of ​​961m 2 The mesh rack consists of 3249 column components in total. So many columns need to be accurately installed according to the coordinates of the drawing to form a square column storage space of 720mm (length) x 720mm (width) x 4600mm (height). To ensure the smooth storage and retrieval of waste bins, the design requires that the verticality of the columns must be controlled within 2mm.

[0008] In existing nuclear waste storage facilities, vertical adjustment of columns usually uses tools such as fall chains or rigging turnbuckles. These tools are connected to the columns and use pulling or pushing force to adjust the position and verticality of the columns. However, these methods have problems such as complex operation, low adjustment accuracy, and damage to the columns. For example, the fall chain needs to set anchor points on the surrounding platforms. It is difficult to control the pulling force during operation, which can easily cause damage to the columns; the rigging turnbuckles are difficult to meet the needs of precise adjustment due to inappropriate hook size or low manufacturing process. Since the shape of the hook does not match the column, the column is often damaged. Therefore, it is necessary to design a special adjustment tool to ensure that the vertical accuracy of the column can be adjusted stably and reliably, which has become an urgent need for on-site construction. Summary of the invention

[0009] In view of the deficiencies in the prior art, an object of an embodiment of the present invention is to provide a nuclear waste barrel steel shelf column installation and adjustment tool.

[0010] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0011] A nuclear waste barrel steel shelf column installation and adjustment tool, comprising: a rotating member, a fixing member, and a self-locking assembly; both ends of the rotating member are provided with nut threads, and the thread directions of the nut threads are opposite, and a plugging hole is provided at the root groove part between the teeth of the nut threads; the fixing member includes a stud and a collar, the stud is installed in the nut threads at both ends of the rotating member, and the collar is provided at the end of the stud; the self-locking assembly includes a plugging screw and a self-locking ball, the plugging screw is installed in the plugging hole and plugs the self-locking ball in the mating tooth groove hole between the nut thread and the stud.

[0012] Optionally, the main body of the rotating member is a long wrench nut, the wrench nut is a ring structure, and the nut threads are provided at both ends of the long axis of the ring structure.

[0013] Optionally, the two wings of the short axis in the middle of the ring structure are square-round, and there is a certain flat arc transition in the middle of the square-round. Both ends of the long axis are in a C-shaped structure, and the corners are arc-transitioned.

[0014] Optionally, the thread shape of the nut thread is: the top of the tooth presents a circular arc shape matching the diameter of the self-locking ball, and the root of the tooth presents an arc groove shape matching the diameter of the self-locking ball.

[0015] Optionally, the collar of one end fixing member is sleeved on the adjusted column, and the collar of the other end fixing member is sleeved on the column to be adjusted. The collar is a circular ring, and both ends of the inner diameter of the collar have arc transitions.

[0016] Optionally, the stud and the collar are connected by welding, and the weld presents an arc trapezoid shape.

[0017] Optionally, a screw hole is opened at the root position of the thread at the end of the stud, and an anti-loosening bolt is installed in the screw hole, and the anti-loosening bolt is higher than the thread crest of the stud.

[0018] Optionally, the collar is made of stainless steel, the stud and the fixing member are made of ordinary carbon steel or alloy steel, the self-locking ball is made of high alloy steel, and the plugging screw and the anti-loosening bolt are made of ordinary carbon steel.

[0019] The embodiment of the present invention also provides an adjustment method for the nuclear waste barrel steel shelf column installation and adjustment tool as described above. Relying on the column that has been adjusted and fixed as a support point, the verticality of another column to be fixed is adjusted. A laser calibrator is used for auxiliary positioning and calibration.

[0020] Further, adjust the relative positions of the fixing members at both ends of the rotating member so that the collars at both ends are respectively sleeved on the adjusted column and the column to be adjusted. Pull the rotating member, and through the force transmission of the nut thread to the stud, push and pull the stud, so that the stud pushes and pulls the collar, and the collar applies a pushing and pulling force to the column to realize the adjustment of the column verticality.

[0021] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0022] 1. The nuclear waste barrel steel shelf column installation and adjustment tool described in this embodiment is mainly composed of a rotating part, a fixing part, and a self-locking component. Nut threads are provided at both ends of the rotating part, and the thread rotation directions of the nut threads are opposite. This design allows the rotating part to push or pull the fixing part in the opposite thread direction when rotating, so as to achieve fine adjustment of the column. The collar not only meets the needs of pulling back and pushing the column forward for easy operation, but also is easy to fix on the column and is not easy to slip. It can be operated with one hand, which is convenient and labor-saving. Through the regulation of the screw, fine adjustments can be achieved, and the accuracy meets the requirements. It will not cause damage to the column, nor will it cause harm to personnel, and will not damage the surrounding factory environment. It saves labor and construction time.

[0023] 2. A plugging hole is provided in the root groove between the teeth of the nut thread, and the plugging hole is used to accommodate the plugging screw. The fixing part is connected to the rotating part through the stud, and is sleeved on the column through the collar. The self-locking component includes a plugging screw and a self-locking ball. The plugging screw is installed in the plugging hole, and the self-locking ball is blocked in the tooth groove holes of the nut thread and the stud. This design not only realizes the good meshing and force transmission characteristics between the bolt and the nut thread, but also realizes the purpose of overload self-locking, while also ensuring good operability in the case of no overload.

[0024] 3. The anti-dropping device is to install a smaller countersunk screw at the end of the stud. The exposed part of the small screw is higher than the top of the stud tooth, but lower than the outer diameter of the nut of the rotating part. In this way, the purpose of anti-dropping can be achieved without hindering the normal column adjustment operation.

[0025] 4. The main body of the rotating part is roughly in the shape of a long strip, with a wide square in the middle and small squares at both ends. The large square and the small square are smoothly connected in an oblique cone shape, with no partition in the middle, and the whole presents a ring structure. The nut threads are at the two ends of the two small squares.

[0026] The middle part of the ring structure is a certain flat arc transition shape in the thickness direction, and the two ends are inverted cylindrical shapes. This design can meet the load-bearing characteristics of the rotating parts on the one hand, and conform to ergonomics and easy to operate on the other hand. At the same time, it shows the characteristics of reliability, efficiency and convenience.

[0027] 5. The weld between the stud and the collar is fully penetrated. The weld is in the shape of a trapezoidal cylinder, and the trapezoidal waist is in a smooth arc transition to reduce stress concentration and show aesthetic art. Non-destructive testing is performed inside the weld to ensure the internal quality. This ensures the welding strength while enhancing the overall durability of the tool.

[0028] Advantages of additional aspects of the present invention will be given in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The spacing or size between each other is exaggerated to show the position of each part, and the schematic diagram is only used for illustration.

[0030] Figure 1 It is a schematic diagram of adjusting the steel frame columns of radioactive waste barrels by using a fall chain;

[0031] Figure 2 It is a schematic diagram of adjusting the steel frame columns of radioactive waste barrels using rigging turnbuckles;

[0032] Figure 3 It is a schematic diagram of adjusting the steel frame columns of a radioactive waste barrel using a special tool provided in an embodiment of the present invention;

[0033] Figure 4 is an overall schematic diagram of an adjustment tool provided by an embodiment of the present invention;

[0034] Figure 5 It is a three-view diagram of a rotating part provided by an embodiment of the present invention;

[0035] Figure 6 is an enlarged view of the end of a rotating member provided in an embodiment of the present invention;

[0036] Figure 7 is a schematic diagram of the installation of a self-locking assembly provided by an embodiment of the present invention;

[0037] Figure 8 is a schematic diagram of a collar provided in an embodiment of the present invention;

[0038] Fig. 9 is a schematic diagram of a screw provided in an embodiment of the present invention;

[0039] Fig.10 is a schematic diagram of the force of a rotating member provided by an embodiment of the present invention;

[0040] Fig.11 is a schematic diagram of a bending moment stress diagram of a rotating member provided in an embodiment of the present invention;

[0041] Fig.12 is a schematic diagram of shear stress of a rotating part provided by an embodiment of the present invention;

[0042] Fig.13 is a schematic diagram of the axial tensile stress of a rotating part provided by an embodiment of the present invention;

[0043] In the figure: 1, rotating part; 11, nut thread; 12, plugging hole; 2, fixing part; 21, stud; 22, collar; 23, anti-drop bolt; 31, plugging screw; 32, self-locking ball; DETAILED DESCRIPTION

[0044] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0045] Terminology explanation:

[0046] Shelves: In nuclear waste storage facilities, mesh shelf structures are used to support and secure waste barrels, ensuring their stable, orderly and reliable storage to prevent leakage of radioactive materials.

[0047] Before adjustment, first follow the process. After the coordinate point of the root of the column of the mesh shelf is determined, the coordinate cross line should be released. Combined with the cross line of the center coordinate of the column floor, the column is hung at the installation coordinate point, and the column is adjusted so that the floor coordinate cross line coincides with the foundation coordinate cross line. Then, the column can be confirmed to be accurately in place. The next step is to mark the corresponding position on the ground according to the position of the four fixing bolt holes of the column floor, then remove the column, drill holes at the marked position on the ground to install the expansion bolts. After the expansion bolts are installed, move the column back and install it in place, so that the four holes of the floor pass through the expansion bolts, and tighten the bolts and nuts. To facilitate the subsequent vertical adjustment, the bolt torque can reach 70% (after the vertical adjustment is qualified, the expansion bolt torque will finally reach 100%). After roughly determining that the column is vertical, connect the corresponding crossbar.

[0048] As described in the background technology, vertical fine adjustment of the column requires special tools. There are two solutions for such special tools in the prior art. They are as follows:

[0049] Solution 1: Arrange fall chains around the columns and use the pulling force of the fall chains to adjust the columns to be vertical. Figure 1As shown in the figure, anchor points are set with expansion bolts on the 4.5m platform around the storage area as the force points of the 1-ton fall chain. One end of the fall chain is hooked on the anchor point, and the other end is hooked on the column. The verticality of the column is adjusted by the pulling effect of the cross-shaped fall chain arranged on the column. Advantages: The hook head of the fall chain is large, which is convenient for hooking the column. Disadvantages: Expansion bolts need to be driven on the 4.5m platform around to set anchor points, which causes a certain degree of damage to the ground. One column requires four fall chains to operate at the same time. The operation process is complicated and difficult, especially the tension of the column adjustment is difficult to grasp, and the column is easily damaged. It requires a lot of manpower, the work efficiency is very low, and the installation and adjustment cost is high.

[0050] Solution 2: Purchase rigging turnbuckles in the market, hang the two hooks of the rigging on the poles, rotate the rigging nuts, and use the tension of the nuts to adjust the distance between the columns. That is, use the fixed columns as the fulcrum to adjust the columns to be adjusted. Figure 2 Advantages: Simple operation, labor saving. Disadvantages: After market research, there is no spiral rigging buckle with an adjustment spacing of exactly 720mm±20mm. During the adjustment process, the verticality of the already adjusted column is greatly affected, and the spiral rigging buckle is not easy to fix and is easy to fall off. On-site tests have found that the hooks at both ends of the existing spiral rigging buckle are too small to meet the requirements of the column. Hook-pull requirements for column tubes. The hook of the spiral rigging buckle is in linear contact with the force-bearing surface of the column. The local linear force on the column tube wall is large, which is easy to damage the column. The manufacturing process of the rigging spiral buckle on the current market is generally not high. The rotation process of the lock buckle is not smooth enough and is easy to get stuck, which easily causes force impact on the column. The adjustment accuracy cannot meet the on-site requirements. In addition, the rigging spiral buckle does not have a self-locking device, and the construction process is difficult to control. It is easy to apply excessive force and cause damage to the column. Moreover, there is no locking device at the end of the screw thread of the rigging spiral buckle, which is easy to disengage during use, causing personal injury.

[0051] In order to solve the above technical problems, the present invention proposes a nuclear waste barrel steel shelf column installation and adjustment tool, which should not cause deformation, bending, scratches and other damage to the columns, and should be efficient, accurate and labor-saving to adjust. It needs to be easy to operate with one hand, light, reliable and reusable. The material of the tool should not pollute or damage the stainless steel material of the column. In view of high-altitude operations, this tool must also withstand a certain impact of free fall to the ground, and its function cannot be lost, it will not be deformed, and it will not be easily broken.

[0052] like Figure 4 As shown, the nuclear waste barrel steel shelf column installation and adjustment tool includes: a rotating part 1, a fixing part 2 and a self-locking component (a blocking screw 31 and a self-locking ball 32); Figure 5 , Figure 6As shown, nut threads 11 are provided at both ends of the rotating member 1, and the threaded directions of the nut threads 11 are opposite, and a plugging hole 12 is provided at the root groove between the teeth of the nut threads 11. The fixing member 2 includes a stud 21 and a collar 22, wherein the stud 21 is installed in the nut threads 11 at both ends of the rotating member 1, and the collar 22 is provided at the end of the stud 21. Figure 7 As shown, the self-locking assembly includes a blocking screw 31 and a self-locking ball 32 . The blocking screw 31 is installed in the blocking hole 12 , and the self-locking ball 32 is blocked in the matching tooth groove holes of the nut thread 11 and the stud 21 .

[0053] The nuclear waste barrel steel shelf column installation and adjustment tool described in this embodiment is mainly composed of a rotating part 1, a fixing part 2 and a self-locking component. Nut threads 11 are provided at both ends of the rotating part 1, and the thread rotation directions of the nut threads 11 are opposite. Such a design allows the rotating part 1 to push or pull the fixing part 2 in the opposite thread direction when rotating, so as to achieve fine adjustment of the column. The collar 22 not only meets the needs of pulling back and pushing the column forward for easy operation, but also is easy to fix on the column and is not easy to slip. It can be operated with one hand, which is convenient and labor-saving. Through the regulation of the screw, fine adjustments can be achieved, and the accuracy meets the requirements. It will not cause damage to the column, nor will it cause harm to personnel, and will not damage the surrounding factory environment. It saves labor and construction time.

[0054] A blocking hole 12 is provided in the root groove between the teeth of the nut thread 11, and the blocking hole 12 is used to accommodate a blocking screw 31. The fixing member 2 is connected to the rotating member 1 through the stud 21, and is sleeved on the column through the collar 22. The self-locking component includes a blocking screw 31 and a self-locking ball 32. The blocking screw 31 is installed in the blocking hole 12, and the self-locking ball 32 is blocked in the tooth groove holes of the nut thread 11 and the stud 21. This design not only achieves good force transmission characteristics between the bolt and the nut thread 11, but also achieves the purpose of overload self-locking, while also ensuring good operability in the absence of overload.

[0055] like Figure 5 As shown, the main body of the rotating member 1 is a long strip spanner nut, the spanner nut is a ring-shaped structure, and the nut thread 11 is arranged at both ends of the long axis of the ring-shaped structure. This design not only enhances the strength and stability of the tool, but also enables the operator to easily adjust the verticality of the column by rotating the spanner nut when adjusting the column. Since the spanner nut is a ring-shaped structure, during operation, force can be applied to the two wings of the short axis of the ring-shaped structure to reduce the force arm and improve the rotation efficiency, thereby reducing the difficulty of operation. In addition, the ring-shaped structure can also effectively disperse the force during adjustment to prevent damage to the tool or inaccurate adjustment due to excessive local force.

[0056] The two wings of the short axis in the middle of the annular structure are square and round, and the two ends of the long axis are round. This design helps the tool to have a good hand grip and operational stability during adjustment. The round part can provide uniform force distribution when in contact with the column to avoid local stress concentration, while the square and round wings design provides the operator with sufficient torque transmission points, further improving the convenience of use and adjustment accuracy of the tool.

[0057] The thread shape of the nut thread 11 is as follows: the tooth top is in an arc shape matching the diameter of the self-locking ball 32, and the tooth root is in an arc groove shape matching the diameter of the self-locking ball 32. The thread shape of the nut thread 11 is specially designed to enhance the smoothness of the tool operation and the self-locking performance.

[0058] like Figure 3 , Figure 4 As shown, the collar 22 of the fixing member 2 at one end is sleeved on the adjusted column, and the collar 22 of the fixing member 2 at the other end is sleeved on the column to be adjusted. Figure 8 As shown, the collar 22 is annular, and the two ends of the inner diameter of the collar 22 have arc transitions. The collar 22 is designed as annular, and the two ends of the inner diameter have arc transitions. This design can make the collar 22 fit the surface of the column more closely during installation, reduce friction resistance, and avoid damage to the surface of the column due to excessive installation force.

[0059] In this embodiment, the stud 21 and the collar 22 are connected by welding. This connection method can ensure that the tool will not loosen or break under high-intensity use. The weld is specially treated, and the weld has a trapezoidal cylindrical appearance, and the trapezoidal waist has a smooth arc transition to reduce stress concentration and show aesthetic art. Non-destructive testing is performed inside the weld to ensure the internal quality. This ensures the welding strength while enhancing the overall durability of the tool.

[0060] like Fig. 9 As shown, a screw hole is provided at the thread root position of the end of the stud 21, and an anti-slip bolt 23 is installed in the screw hole. The anti-slip bolt 23 is higher than the thread top of the stud 21 and lower than the outer diameter of the nuts at both ends of the rotating part. The length of the screw 23 is reasonably designed and does not hinder the adjustment operation. The anti-slip bolt 23 is higher than the thread top of the stud 21, and its main function is to further prevent the stud 21 from slipping out of the rotating part 1 during use. The anti-slip bolt 23 ensures that the stud 21 always remains stable in the rotating part 1 by providing additional mechanical constraints in the thread, provides additional safety protection, and ensures smooth operation.

[0061] Since the steel shelf is made of stainless steel, it is necessary to ensure that it is not contaminated by carbon steel during the installation process. The collar 22 of the special tool must be made of stainless steel, while the stud 21 and the rotating wrench can be made of ordinary carbon steel or alloy steel. The self-locking ball 32 is made of high alloy steel. The plug screw 31 is made of ordinary carbon steel. The collar 22 and the stud 21 are welded with stainless steel welding wire using the argon arc welding process, and non-destructive testing and evaluation are carried out according to the secondary weld. This material combination design not only takes into account the strength, corrosion resistance and self-locking performance of the tool, but also reduces the manufacturing cost and ensures its long service life.

[0062] In summary, the tool includes two extended special-designed studs with collars (one with right-hand threads and one with left-hand threads). An oval manually rotatable wrench nut with two nuts (one with right-hand threads and one with left-hand threads, and holes are drilled on both sides of the nuts for installing self-locking balls and plug screws) at both ends of its long axis, which are respectively matched with the two extended bolts of the collars. The short axis direction is designed as an arm for easy manual rotation.

[0063] The main body of the rotating part is generally strip-shaped, with a wider square in the middle and narrower squares at both ends. The large square and the small square are smoothly connected in a trapezoidal shape without partitions, presenting an overall annular structure. The nut threads are respectively at the two ends of the two small squares.

[0064] The middle part of the annular structure has a certain flat arc transition in the thickness direction, and a U-shaped structure at both ends with rounded corners at the corners. Such a design can meet the load-bearing characteristics of the rotating part on the one hand and conform to ergonomics for easy operation on the other hand. At the same time, it shows the characteristics of reliability, efficiency and convenience.

[0065] In other embodiments, the collars at both ends can be made into collars with various diameters. The stud and the collar are connected by bolts, so that collars matching the diameter of the column can be selected according to the change of the column diameter to meet its universality requirements.

[0066] In other embodiments, the collars at both ends can be improved into a grasping or bayonet shape, and they are connected with the stud by threads to meet the adjustment requirements of different-shaped columns at different heights.

[0067] In other embodiments, the rotating wrench can be made into various forms with different sizes according to the adjustment of the pulling force and the convenience of operation to meet the requirements of different adjustment forces.

[0068] In other embodiments, the above different components (such as nut wrenches, studs, collars) can be combined differently to meet different usage requirements.

[0069] The adjustment method using the above adjustment tool is as follows:

[0070] Relying on the already adjusted and fixed column as a support point, adjust the verticality of another column to be fixed. Adjust the relative positions of the fixings at both ends of the rotating part so that the collars at both ends are respectively sleeved on the adjusted column and the column to be adjusted. Pull the rotating part, and push and pull the stud through the force transmitted by the nut thread to the stud, so that the stud pushes and pulls the collar, and the collar applies a push-pull force to the column to achieve the vertical adjustment of the column. During the adjustment, a laser calibrator is used for precise positioning and correction.

[0071] After using the special tools for installing and adjusting the mesh shelf columns, the actual results of on-site use have the following advantages and benefits:

[0072] Economic benefits: In actual use, the column adjustment process is greatly simplified and work efficiency is improved. The original complicated process of laying out the line, fixing the expansion bolts, and installing the fall chain for adjustment is eliminated, and the adjustment can be done directly with special tools, which saves a lot of manpower. The on-site installation period is greatly shortened, and the actual construction period is shortened from the original 4.2 months to 1.5 months, reducing the construction period cost and saving about 603,000 yuan.

[0073] In actual use, the vertical accuracy of the mesh shelf columns is improved to better meet the design requirements. Using the original fall chain to adjust the verticality, it is difficult for the shelf columns to be within 2mm, and generally less than 60%. The special tool has a fine adjustment function. After using the special tool for adjustment, the verticality of the shelf columns can not only quickly reach within 2mm, but also the qualified rate has reached more than 99%.

[0074] In actual use, it saves labor resources and installation costs. Originally, 11 people were needed to operate and supervise each shift when using the chain-back adjustment. After using special tools, only 4 people are needed per shift. According to the original 11 people per shift and the 4.2-month construction period (30 days per month), the total cost is P1 = 4.2X30X11X500 = 693,000 yuan. Note: The comprehensive unit price of technical workers is calculated at 500 yuan per day. The cost after using special tools is: P2 = 1.5X30X4X500 = 90,000 yuan. The labor cost alone saves 603,000 yuan.

[0075] Special tools are easy to use, easy to operate, safe and reliable, and simple to maintain. They are a rare installation tool.

[0076] Social benefits: The invention of this special tool can not only adjust the mesh shelf, but also adjust the distance and tension between other columnar objects. This special tool can be further promoted to the installation and adjustment of other nuclear power plant waste barrel steel shelves, and can also be promoted to the spacing adjustment of other civilian facilities. It has a wide range of uses and produces good social benefits.

[0077] The above-mentioned actual effects are the true embodiment of the reliability and practicality of the design and development plan, which can be pushed and pulled, adjusted efficiently, and can achieve fine adjustment.

[0078] In order to make the technical solution provided by the embodiment of the present invention clearer, a detailed analysis, design and calculation process of the embodiment of the present invention is given:

[0079] 1. Special tools need to meet the following performance requirements:

[0080] 1. It should be as simple, reliable and practical as possible, saving time and effort, and making the operation efficient. 2. It should have both pull-back and push-out functions. 3. It should be able to make fine adjustments and have a safety self-locking device. 4. It should not damage or contaminate the steel frame columns.

[0081] 2. Selection of special tool materials:

[0082] The diameter of the column pipe is The material is 06Gr19Ni10. Therefore, the inner diameter of the collar of the special tool should be greater than 60mm and less than 80mm, which is convenient for operation and practical. The steel pipe is used as the casing, and the material is 06Gr19Ni10. The material of the collar is consistent with that of the column to avoid damage to the column material during adjustment.

[0083] Further investigation: Mechanical properties of 06Gr19Ni10 seamless steel pipe: tensile strength ≥520MPa, yield strength ≥210MPa, elongation (heat treated state) ≥35%. Elongation (non-heat treated state) ≥25%. Performance data comes from the "Mechanical Design Manual". In other words, The seamless stainless steel pipe is used as a collar and is put on the column for adjustment. As long as the collar does not yield and deform due to the tension of the stud, the column will not bend or dent. On the one hand, the collar is put on the column and is in surface contact with the column, which increases the force area, reduces the peak stress, and ensures that the steel column does not deform. At the same time, in order to reduce the damage to the column caused by the edges and corners of the sleeve end, the edges and corners are removed during manufacturing and processing to make a smooth transition. On the other hand, the length is selected to be 50mm to ensure the convenience of workers' operation.

[0084] The drawing stipulates that the column spacing is 720mm. Within the height range of 5m, the visual column vertical tolerance can be controlled within 100mm. It is deduced that the center spacing of the collars of the special tool should be 720mm, and the collar forward push and pull back spacing should be controlled within 200mm, that is, the adjustable range of the collar spacing is 720±200mm, which can meet the use requirements. After further decomposing the outline dimensions of each component, it is found that the adjustable bolts welded on the two collars have an adjustable range of thread length within 110mm.

[0085] Taking into account both cost saving and performance guarantee, as well as the convenience of market procurement, the bolts are processed using Q355B hot-rolled round steel. The mechanical properties are as follows: Yield strength: diameter ≤ 16mm: greater than 345MPa, diameter 16-40mm: greater than 335MPa. Tensile strength: 470~630MPa. Elongation: greater than 17. Impact test: Test temperature: 20℃: greater than 34. The above data comes from the "Mechanical Design Manual". Plan to purchase from the market High-quality carbon alloy steel round bars are turned and processed according to the latest implementation standard GB / T1591-2018.

[0086] Taking full account of the operability and economy of the rotary nut wrench, Q235B carbon steel is selected to make the nut wrench while ensuring basic performance and taking into account market procurement convenience. The mechanical properties of Q235B steel are as follows: The chemical composition and mechanical properties parameters of Q235 carbon steel are as follows:

[0087] 1. Chemical composition: Sulfur content: ≤0.045%; 3. Phosphorus content: ≤0.045%; 4. Manganese content: 0.30%-0.70%.

[0088] 2. Mechanical properties: 1. Tensile strength: ≥375MPa; 2. Yield strength: ≥235MPa; 3. Elongation: ≥25%.

[0089] It is planned to use carbon steel plate with δ=32 for turning. Procurement is carried out according to the latest standard GB / T 3524-2015.

[0090] After the materials of bolts and nuts are determined, the length, diameter, and weld groove design of the bolt end can be designed and calculated. The shape of the wrench nut, etc. Under the premise of ensuring performance, it is necessary to take into account the convenience and reliability of on-site operation, as well as the convenience and economy of turning, threading and other processing. Self-locking steel balls are subject to constant wear and tear, so they need a harder material, and 35GrMo alloy steel is selected. The plugging countersunk screws and anti-disengagement self-locking studs are made of Q355B material.

[0091] 3. Preliminary design of special tools

[0092] The method of adjusting the steel frame column is to first rely on the already adjusted and fixed column as a support point to adjust the verticality of another column to be fixed, just like a person holding the already adjusted and fixed column with one hand, and moving or turning another column to be fixed with the other hand to adjust its verticality. The premise of adjusting the column to be fixed is that its root has been initially fixed and cannot move back and forth. Based on this idea, the special tool is designed to be a ring that can be put on the column at both ends, and the stud is welded on the ring. An elliptical wrench nut is used in the middle. The rotating nut is manually turned, and the force transmitted by the nut to the stud is pushed and pulled by the nut thread, so that the stud pushes and pulls the ring, and the ring finally applies a push-pull force to the column to achieve the vertical adjustment of the column. The long axis end of the wrench nut is a nut thread, one on each side. The short axis part is a handle that can be rotated and turned. Correspondingly, the threads of the two studs are also one on each side.

[0093] 4. Detailed design of special tools:

[0094] 1. Design the special tools in detail according to the preliminary design drawings.

[0095] Since the distance between the columns is 720mm, when the tool is adjusted to achieve the economic state (economic state: the oval spanner nut, the nuts at both ends of the long axis are just in the middle of the length of the connecting stud thread, the spanner is most efficient and saves effort), the distance between the two rings should be 720mm. The total distance of the two rings telescopic is 200mm, that is, the telescopic range of a single ring is 0~100mm. Therefore, in the economic state of the tool, the distance between the two rings is 720mm.

[0096] In view of the convenience of operation and the protection of the column, the diameter of the collar is selected to be 80mm, and its wall thickness is 5mm. The length is 50mm. The corners at both ends of the collar are designed to be rounded transitions with r=5mm, which transforms the force-bearing surface at the corners from linear contact to surface contact, eliminating the damage to the column caused by the corners when the collar is stressed. This is the uniqueness of the collar design. In this way, under the same material and similar mechanical properties, the mechanical properties of the collar material can meet the adjustment requirements, and will not cause damage to the column due to excessive push and pull force of the collar.

[0097] Processing technology requirements:

[0098] 1. The processing error of the ring length is ±5mm, and the burrs on both ends are removed.

[0099] 2. The machining tolerance of the ring geometry and diameter is ±1mm.

[0100] 3. Before formal processing, the studs must be subjected to RT testing, and level 2 is qualified.

[0101] Through analysis, the center distance between the two rings is 720mm, so the minimum distance between the two ring walls is 720-40X2=640mm. In view of the convenience of wrench nut operation, the long axis length of the wrench nut is selected to be 260mm and the short axis is 100mm. The two wings of the middle short axis are square and round, and the two ends of the long axis are round, with nut threads at the ends. The mechanical structure of the whole shape is reasonable, the operation is convenient and easy, and it conforms to the principles of ergonomics. Two M1.5X1.0-7H through countersunk screw holes are designed on the upper and lower sides of the nuts at both ends for installation. The self-locking steel ball is filled with lubricating graphite powder, and then sealed with a M1.5X1.0-6g countersunk screw. At this time, the countersunk screw has two functions: one is to seal the steel ball to prevent it from falling off. The other is to seal the added lubricating graphite powder. The threads of the screw holes at both ends of the wrench nut are designed as M10X1.5 rectangular toothed threads. The top of the tooth presents an arc shape of D=1.5, and the root of the tooth presents an arc groove shape of D=1.5. Pitch P=2mm, tooth top width f=tooth bottom width W=1mm, tooth top arc radius r=tooth bottom arc radius R=0.75mm. Tooth height h1=1.6mm. This shape of thread can be used with The self-locking steel ball realizes good assembly and motion coordination with the stud tooth pattern. This design not only realizes the good force transmission characteristics of the bolt and nut, but also realizes the purpose of overload self-locking. At the same time, it also ensures good operability under non-overload conditions. That is, when the tension on the screw exceeds 50N, the tooth spacing between the bolt and the nut is reduced, and all the tension is transmitted by the two self-locking steel balls. Since the force on the steel ball and the side of the screw tooth is point contact, there will be a jam or lag phenomenon when rotating the spanner nut, and this jam or lag feels obvious and makes an abnormal sound. The worker can accurately judge that the tension exceeds the standard and stop turning the spanner nut, thereby protecting the steel frame column from damage caused by excessive tension. When the tension on the screw is less than 50N, the gap between the teeth of the bolt and the nut is large, the force between the teeth is surface contact (the self-locking steel ball is not under force and does not work at this time), the rotation is smooth (graphite powder plays a lubricating role), the hand feels easy, there is no abnormal sound, and the worker can normally turn the spanner nut to adjust the column spacing.

[0102] In order to make the self-locking ball slide freely in the tooth groove of the stud and automatically lock when the screw teeth are stressed. The machining tolerance of the screw teeth and the machining diameter tolerance range of the self-locking ball are a major difficulty in this design. According to the basic hole system design principle, the machining tolerance of the M10 hole is F8 (+16~+43), and the tolerance of the shaft is f8 (-16~-43). The tolerance range of the two is [32, 86]. From this, it can be analyzed that the tolerance of the self-locking ball should be greater than 32 and less than 86, so that the purpose of self-locking can be achieved when the teeth are stressed. Therefore, the tolerance of the self-locking ball is determined to be After multiple on-site manufacturing trials and tests, the processing of the self-locking ball was optimized, and its manufacturing tolerance was finally determined to be

[0103] Processing technology requirements:

[0104] 1. The materials used to process spiral locks must be non-destructively tested before formal processing, using RT testing and passing the second-level testing.

[0105] 2. The processing tolerance of the spiral lock is ±1mm.

[0106] 3. The thread is processed according to level 8.

[0107] 4. The thread processing of tension bolts and spiral rigging is matched with P7 / h6.

[0108] 5. After processing, remove burrs and polish edges and corners to make them smooth.

[0109] 6. The surface of the spiral lock is galvanized in accordance with GB / T 5267.3-2008 standard.

[0110] 7. To seal the screw hole, the hole should be opened just in the groove at the root between the nut teeth. The hole size should be large enough to fit the self-locking ball and can cooperate with the sealing countersunk screw.

[0111] Thus, 640-250=390mm, which is the sum of the lengths between the two studs when the two nuts are in an economical state. That is, the length of each stud is 180+50=230mm, where the wire length is 100mm and the stud diameter is In view of the compatibility with the spanner nut, the thread of the stud is designed as a rectangular tooth thread of M10X1.5, with the top of the tooth presenting a circular arc shape of D=1.5 and the root of the tooth presenting a circular arc groove shape of D=1.5. Such a thread can be compatible with The self-locking steel ball achieves good assembly and good movement coordination with the teeth of the wrench nut. It realizes the characteristics of smooth and accurate force transmission, and can also achieve the purpose of overload self-locking. At the same time, it ensures a good operating feel when not overloaded, so that it rotates smoothly and transmits force smoothly. When the screw is subjected to a tensile force exceeding 50N, the tooth matching spacing between the bolt and the nut is reduced. At this time, the meshing force between the teeth is completely transmitted by the two self-locking steel balls. Since the contact between the steel ball and the tooth surface is a point contact, the rotation is stuck, stagnated, and an abnormal sound is emitted. Workers can judge the overload and stop the rotation operation. At the same time, in order to solve the problem of the wrench nut and the stud being disengaged, an anti-disengagement bolt is specially designed at the end of the stud. After the stud and the wrench nut are assembled, the anti-disengagement bolt is installed at the end of the stud. The unique design of the anti-disengagement bolt is that the screw is 7mm long and the screw hole is 6mm deep. In this way, when the screw is tightened, the protruding 1mm screw can just prevent the wrench nut from disengaging, so that the wrench nut will not fall off the stud. The protruding length is designed to be just right. If it is too long, it will affect normal operation, and if it is too short, it will not prevent tripping.

[0112] Processing technology requirements:

[0113] 1. The processing of stud filaments shall comply with GB / T2302. The processing of stud and spiral rigging threads shall comply with P7 / h6.

[0114] 2. Before formal processing, the studs must be subjected to RT testing, and level 2 is qualified.

[0115] 3. The machining tolerance of stud length and diameter is ±1mm.

[0116] 4. Remove burrs after processing.

[0117] 5. The welding of the collar and the stud is done by argon arc welding, and the welding wire is ER304L.

[0118] 6. The weld between the collar and the stud must be inspected by RT, and the inspection result must be qualified as level 2.

[0119] 7. The stud surface is galvanized in accordance with GB / T 5267.3-2008 standard.

[0120] 8. The anti-disengagement screw hole at the end of the stud should be drilled and tapped after the stud processing is completed.

[0121] 9. After the anti-drop bolts are processed, they should be tested with their mounting screw holes to meet assembly requirements.

[0122] 2. Mechanical properties analysis and calculation of special tools

[0123] (1) Mechanical properties analysis of the ring: The pipe specifications of the column are The material is 06Gr19Ni10 and the length is 4600mm. The specifications of the ring are The material is 06Gr19Ni10, and the length of the collar is 50mm. Therefore, the overall mechanical properties of the column are better than those of the collar. In other words, when the collar is deformed under stress, the column tube has not yet deformed. When the collar is about to deform but has not yet deformed, the self-locking device is activated to protect the column. It is known that the minimum yield strength of this type of steel pipe is 210MPa. That is, the maximum tensile force of the stud cannot be greater than 210MPa.

[0124] When the spanner nut is rotated, the maximum tensile force input on one side is 25 N. The input value is much smaller than 210 MPa, so the strength of the collar can meet the use requirements.

[0125] (2) Mechanical properties analysis and calculation of stud and collar weld: Based on the above analysis, the length of the stud is 230 mm and the diameter is selected as The material is Q355B high-quality low-alloy steel, which is turned into M10 studs. As mentioned above, The tensile strength of round steel is 310MPa. The following calculation and analysis is performed based on the maximum tensile force of 50N.

[0126] Since the material of the collar is 06Gr19Ni10, and the material of the stud is Q355B high-quality low-alloy steel, TIG-ER304L is used for welding the two. The welding of the ferrule and the stud adopts full penetration welding, so the joint weld between the ferrule and the stud is completely melted by the welding wire.

[0127] It is found that the tensile strength of TIG-ER304L welding wire is ≥520MPa; the yield strength is ≥205MPa; the elongation is ≥30%; and the impact toughness is ≥19J / CM2.

[0128] Since the full penetration weld is irregular, its cross-sectional area loss rate is 0.2, so the effective area is SX(1-0.2)=78.5X0.8=62.8mm 2 , the maximum tensile stress input of the stud is 50N. (It is known that the allowable stress of Q355B steel is 172.5MPa)

[0129]

[0130] σ 拉max <δ 许用 =172.5MPa stud design meets the use requirements.

[0131] In order to enhance the mechanical properties of the stud and the collar, full penetration welding is adopted. The end of the stud and collar is designed to be 45° conical. The collar and stud are welded by argon arc welding, and the welding wire is ER304L. The weld between the collar and the stud must be inspected by RT, and the inspection result must be qualified at level 2. After welding, the weld appearance is processed and polished, and the weld near the stud has a smooth transition. The weld near the collar has a smooth transition, and the middle part has a circumferential arc transition. This design not only ensures the force transmission characteristics of the weld, but also avoids the stress concentration caused by sharp misalignment or pits.

[0132] (3) Mechanical analysis and calculation of spanner nut

[0133] As the name implies, the spanner nut is both a rotating spanner and a nut that connects the stud. The design shape of the spanner nut is approximately oval or a large rectangle in the middle + small rectangles on both sides (the long side connection section between the large rectangle and the small rectangle is trapezoidal and smoothly transitioned, there is no short side connection in the middle, the two long sides of the large rectangle are wide, flat and smoothly transitioned, and have reinforced ribs. The long side of the small rectangle is thick and narrow semi-columnar, the end of the small rectangle is a round and thick nut, and the two sides of the nut are thick and narrow semi-columnar small rectangle long sides). The end of the long shaft is columnar, round and thick, and the end is processed into a nut shape. The nut has positive and negative threads, which match the stud threads. The middle part of the short shaft is processed into a flat shape, presenting a wide and thick strip shape, which is convenient for connecting the nut at the long shaft and also for wrenching and rotating operations.

[0134] The outer diameter of the spanner nut is The nut is 30mm long. Both sides of the nut are connected to the connecting arm. The total length of the spanner nut is 260mm. Excluding the 30mm nut length at both ends, the length of the middle connecting arm is 200mm. The width gradually transitions from 30mm at the end to 100mm in the middle. The widest part in the middle is 100mm. The length of the transition section from the end to the middle is 24mm.

[0135] Depend on Fig.10 , Fig.11 , Fig.12 , Fig.13 Stress analysis shows that the weakest part of the nut runner is the middle part with a length of 100 mm. This part has the smallest cross-sectional area, but it has to withstand the rotation torque and the tension of the nuts at both ends. The minimum cross-sectional area of ​​this part on one side is

[0136]

[0137] Input the tensile force on one side as 25N. According to the standard, the torque standard of M10 8.8 grade bolts should be between 8.5Nm and 11.7Nm. Here, the maximum value of 11.7Nm is selected as the calculation input. For the convenience of calculation, 12N.m is selected.

[0138] When the handle is rotating, it is subjected to the torque of the turning and the tension of the bolts at both ends. Therefore, the handle is subjected to the combined effect of tension and bending moment. The axial tension and rotational bending moment are as follows: Fig.10 As shown; the bending moment stress is as Fig.11 As shown; shear stress as Fig.12 As shown; axial tensile stress as Fig.13 shown.

[0139] Analysis shows that the weakest part of the rotary wrench is the middle part, so the force calculation and strength verification of the middle part are carried out. As long as the mechanical properties of the middle part can meet the requirements, the other parts can meet the use requirements.

[0140] The strength calculation formula is as follows:

[0141]

[0142] Among them, M Tmax —The maximum torque unit of the handle: KN.M

[0143] w z —Bending section modulus unit: N / mm 3

[0144] Unit: mm 3 (where b is the length perpendicular to the bending moment)

[0145] According to the design drawing of the nut wrench, the thickness of the single-side handle is 8 mm and the width is 15 mm. That is, h = 8 mm and b = 15 mm.

[0146] but:

[0147] The maximum torque M of the single-side handle input Tmax =12N.m

[0148] then:

[0149] Among them, N max —The maximum pulling force on the handle. Unit: N

[0150] Handle force area unit: mm 2

[0151] Its single side handle The minimum cross-sectional area of ​​a single-side handle is A = 160 mm 2

[0152] The tensile stress of the handle on one side is:

[0153] Therefore, it can be seen from the above that the maximum stress on the single-side handle is tensile stress.

[0154] б 总 =σ 拉max +б 弯max =75+0.15625=75.15625MPa

[0155] б 总 ﹤б 许用 =172.5MPa

[0156] From this, it can be inferred that the reliability of the designed wrench can meet the requirements.

[0157] (4) Stress analysis and calculation of studs

[0158] The bolts at both ends of the special tool are subjected to tension and pressure during the process of adjusting the column. The adjusted column is used as a support to push and pull another column to achieve the purpose of adjusting its verticality. The calculation input is 50N for the tension of the wrench stud and the diameter of the stud is but

[0159]

[0160] Then the tensile strength of the stud is about 0.64MPa

[0161]

[0162] From this, it can be inferred that the strength of the studs can also meet the requirements.

[0163] (5) After manufacturing, remove the surface burrs of the stud and spanner nut, and polish the surface of the spanner to make it smooth. The stud and spanner nut are galvanized in accordance with GB / T 5267.3-2008. The weld between the collar and the stud must be inspected by RT.

[0164] This special adjustment tool needs to meet the adjustment requirements under different stress conditions. While ensuring normal use, its safety and reliability need to be guaranteed, and its ease of use and adjustment accuracy need to be guaranteed. Therefore, its shape design and force calculation, as well as its self-locking characteristics, anti-slip characteristics, and the ability to add lubricating graphite powder are the key points of this invention. It is specifically manifested in the shape and size selection design of the ring, the shape, size, and material design of the stud, and the force calculation, including the design and force calculation of the welding between the stud and the ring. Material selection, shape design, and force calculation of the wrench.

[0165] The rotary wrench is subjected to both tensile force and rotational torque applied by manpower. Its force conditions are relatively complicated. Under such complex force conditions, its safety, reliability and practicality must also be met. Therefore, force analysis calculation and shape design are the key.

[0166] The welding of the collar and the stud is a weld structure form obtained after the weld stress calculation. Therefore, the weld form and welding technical requirements are the focus and key points of the invention.

[0167] The unique design features of the threads of the studs and nuts, as well as the use of the thread gap changing with the tension, and the self-locking characteristics of the steel ball and the teeth when the gap is reduced to a certain extent, solve the problem of tension overload. The spacing between the threads changes with the force and the self-locking ball can achieve the purpose of self-locking appropriately. This unique design of rectangular threads with arc-shaped ends is a novel, simple and practical feature of this tool design. This is the result of continuous optimization and improvement from theoretical calculations and on-site manufacturing and use practices.

[0168] In order to cleverly install the self-locking ball and seal the self-locking ball in the matching tooth slot hole of the wrench nut and the stud, a sealing countersunk screw is designed here. The special feature is that the countersunk screw is used to reduce the protrusion on the surface of the wrench nut, which is convenient for operation and can reliably seal the self-locking ball. At the same time, the sealing countersunk screw can also be opened, and lubricating graphite powder can be added to the screw hole before installing the countersunk screw. Graphite powder can not only lubricate the self-locking ball to make it rotate flexibly, but also provide long-term lubrication for the screw teeth of the wrench nut and the stud, ensuring that they rotate smoothly and labor-saving.

[0169] At the same time, an anti-disengagement spiral slotted screw is designed at the end of the stud. This design is to drill and tap the outermost thread groove at the end of the stud, and then turn out the corresponding screw and test install it. The special feature of this screw is that its length is greater than the depth of the screw hole, that is, the screw length is 7mm and the screw hole depth is 6mm. When the screw is tightened, the extra 1mm can just prevent the wrench nut thread from disengaging, and it will not affect normal operation, which is safe and reliable. The problem of nut and stud disengagement is solved.

[0170] The inner edges and corners of the two collar ends of the special tool are designed to be in an arc transition shape, thereby eliminating the damage to the column when the collar is subjected to force.

[0171] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A nuclear waste barrel steel shelf column installation and adjustment tool, characterized in that: Comprising: A rotating member, a fixing member and a self-locking assembly; Both ends of the rotating member are provided with nut threads, and the thread directions of the nut threads are opposite. A plugging hole is provided at the root groove part between the teeth of the nut threads; The fixing member includes a stud and a collar. The stud is installed in the nut threads at both ends of the rotating member, and the collar is arranged at the end of the stud; The self-locking assembly includes a plugging screw and a self-locking ball. The plugging screw is installed in the plugging hole and plugs the self-locking ball in the mating tooth groove hole between the nut thread and the stud.

2. The nuclear waste barrel steel shelf column installation and adjustment tool as claimed in claim 1, characterized in that: The main body of the rotating member is a long wrench nut. The wrench nut is a ring structure, and the nut threads are arranged at both ends of the long axis of the ring structure.

3. The nuclear waste barrel steel shelf column installation and adjustment tool as claimed in claim 2, characterized in that: Both wings of the short axis in the middle of the ring structure are square-round, and the middle is in a flat arc transition shape. Both ends of the long axis are in a C-shaped structure, and the corners are in an arc transition.

4. The nuclear waste barrel steel shelf column installation and adjustment tool as claimed in claim 1, characterized in that: The thread shape of the nut thread is: the top of the tooth presents a circular arc matching the diameter of the self-locking ball, and the root of the tooth presents an arc groove shape matching the diameter of the self-locking ball.

5. The nuclear waste barrel steel shelf column installation and adjustment tool as claimed in claim 1, characterized in that: The collar of one end fixing member is sleeved on the adjusted column, and the collar of the other end fixing member is sleeved on the column to be adjusted. The collar is a circular ring, and both ends of the inner diameter of the collar have an arc transition.

6. The nuclear waste barrel steel shelf column installation and adjustment tool as claimed in claim 1, characterized in that: The stud and the collar are connected by welding.

7. The nuclear waste barrel steel shelf column installation and adjustment tool as claimed in claim 1, characterized in that: A screw hole is opened at the root position of the thread at the end of the stud, and an anti-loosening bolt is installed in the screw hole. The anti-loosening bolt is higher than the top of the thread of the stud.

8. The nuclear waste barrel steel shelf column installation and adjustment tool as claimed in claim 7, characterized in that: The collar is made of stainless steel, the stud and the fixing member are made of ordinary carbon steel or alloy steel, the self-locking ball is made of high alloy steel, and the plugging screw and the anti-loosening bolt are made of ordinary carbon steel.

9. A method for adjusting the installation adjustment tool for the nuclear waste barrel steel shelf column according to any one of claims 1 to 8, characterized in that: Relying on the already adjusted and fixed column as a support point to adjust the perpendicularity of another column to be fixed.

10. The adjustment method according to claim 9, characterized in that: Adjust the relative positions of the fixing members at both ends of the rotating member so that the collars at both ends are respectively sleeved on the adjusted column and the column to be adjusted. Pull the rotating member, and push and pull the stud through the force transmission of the nut thread to the stud. Thus, the stud pushes and pulls the collar, and the collar exerts a pushing and pulling force on the column to realize the adjustment of the perpendicularity of the column.

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