Tool

Abstract

The utility model relates to the technical field of nuclear power equipment disassembling and assembling tools, in particular to a tool which is used for disassembling and assembling a reactor core detector assembly and a cable assembly and comprises an opening head. The opening head comprises a head body, two protruding blocks are vertically arranged on the first end face of the head body in a protruding and extending mode, and a semi-closed opening groove is jointly defined by the two protruding blocks and the head body. Wherein the width of each convex block is smaller than a first threshold value, the width direction of each convex block is the direction in which the two convex blocks are close to each other, and the first threshold value is the minimum distance between the threaded fastening parts of the two adjacent reactor core detector assemblies or cable assemblies; the tool provided by the utility model can be used for easily and conveniently disassembling and assembling the reactor core detector assembly and the cable assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power equipment dismounting tool technical field, specifically related to a tool for dismounting and mounting the core detector assembly and cable assembly. BACKGROUND

[0002] The integrated neutron assembly detector of the core measurement system needs to be dismounted from the integrated connecting cable due to the need of replacement or maintenance, but the four core detector assemblies of the integrated neutron assembly detector on the same tube seat have the same height of torque position, the space distance between the adjacent two core detector assemblies is small, and the conventional wrench cannot dismount or install the core detector assembly and the cable assembly, so the tool is needed for dismounting and mounting. SUMMARY

[0003] In view of the above shortcomings of the prior art, the utility model aims at providing a tool which can dismount and mount the core detector assembly and the cable assembly more easily and conveniently.

[0004] To achieve the above object and other related objects, the utility model provides a tool for dismounting and mounting the core detector assembly and the cable assembly, which comprises an open head.

[0005] The open head comprises a head main body, the first end surface of the head main body is vertically provided with two protrusions, and the two protrusions and the head main body jointly enclose a semi-closed open slot.

[0006] The width of the protrusion is less than a first threshold value, the width direction of the protrusion is the direction of the two protrusions close to each other, and the first threshold value is the minimum distance between the thread fastening parts of the adjacent two core detector assemblies or cable assemblies.

[0007] In an embodiment of the utility model, the open slot is square.

[0008] In an embodiment of the utility model, the width of the protrusion is less than or equal to 12mm, and the width dimension of the open slot is greater than the minimum width of the thread fastening part and less than the maximum width of the thread fastening part.

[0009] In an embodiment of the utility model, the total length of the tool is less than a second threshold value, and the second threshold value is the distance between the core detector assembly or cable assembly and the guide cylinder surrounding plate.

[0010] In an embodiment of the utility model, the second end surface of the head main body is provided with a connecting part, and the connecting part is provided with a clamping column; wherein the second end surface and the first end surface are oppositely arranged and parallel to each other.

[0011] In an embodiment of the utility model, the connecting portion is parallel with the protruding blocks and is located between the extension directions of the two protruding blocks, and the connecting portion is arranged close to one of the protruding blocks.

[0012] In an embodiment of the utility model, further include with the connecting portion detachable connection digital display torsion bar, and / or the opening head is provided with the safety rope for with the digital display torsion bar or user's hand restraint connection.

[0013] In an embodiment of the utility model, further include the rod body, the rod body with the second end surface of the head portion main body integral type connection, the second end surface with the first end surface back to setting and each other parallel.

[0014] In an embodiment of the utility model, the rod body is provided with antiskid pattern.

[0015] In an embodiment of the utility model, the rod body is provided with the restraint portion for with user's hand restraint.

[0016] In summary, the utility model discloses a tool for disassembling or installing the core probe assembly and cable assembly of nuclear power equipment, the shape and size of the open slot are same with the thread fastening portion of the core probe assembly or cable assembly, through the open slot of half closed structure and make the width of the protruding block less than the minimum distance between the thread fastening portion of adjacent two core probe assemblies or cable assemblies, it is helpful for the disassembling tool to be positioned and fitted into the thread fastening portion of the core probe assembly or cable assembly more easily in limited space, to ensure that it can be operated in narrow space, avoid structural interference, improve the disassembling convenience of the core probe assembly and cable assembly. ACCURACY OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0018] Figure 1 It is the position relation diagram between the integrated neutron assembly probe, integrated connecting cable and guide cylinder surrounding plate of the core measuring system of the utility model;

[0019] Figure 2 It is the position relation diagram between the first thread fastening portion of the four core probe assemblies of the utility model;

[0020] Figure 3 It is the opening head structure diagram of the tool in an embodiment of the utility model.

[0021] Figure 4 This is a set of tools used for disassembling and assembling the integrated neutron component detector and the integrated connecting cable in one embodiment of the present invention, wherein both the first wrench head and the second wrench head can be adapted and connected to the digital display torque bar.

[0022] Figure 5 This is a schematic diagram of one possible structure of the tool described in an optional embodiment of the present utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the first or second wrench head and the digital torque bar adapted and connected in an optional embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of another structure of the tool described in an optional embodiment of the present utility model;

[0025] Figure 8 for Figure 6 Cross-sectional view of the structure along the AA direction;

[0026] Figure 9 This is a schematic diagram showing the dimensions of the opening head of the tool in an optional embodiment of the present invention;

[0027] Figure 10 for Figure 8 A schematic diagram of the side structure dimensions;

[0028] Figure 11 This is a dimensional schematic diagram of another structure of the tool in an optional embodiment of the present invention;

[0029] Figure 12 for Figure 10 A schematic diagram showing the dimensions of a cross-sectional view along AA;

[0030] Figure 13 This is a schematic diagram of the engaging component structure in an optional embodiment of the present utility model;

[0031] Component labeling description: Open head 10, Head body 11, Opening groove 110, First end face 111, Protrusion 12, Second end face 112, Connecting part 13, Snap-fit ​​post 131, Hollow structure 132, Digital display torsion bar 2, Rod body 3, Constraint part 31, Snap-fit ​​part 4, Plate body 41, Connecting part 42, Snap-fit ​​hole 421, First wrench head 100, Second wrench head 200, Third wrench 300, Fourth wrench 400, Core detector assembly 500, First threaded fastening part 501, Cable assembly 600, Second threaded fastening part 601, Guide cylinder cover 700, Stack side pipe 800. Detailed Implementation

[0032] The following embodiments and particular examples illustrate the embodiments of the present application. Other advantages and effects of the present application can be easily understood by those skilled in the art from the content disclosed in the present specification. The present application can also be implemented or applied in other different embodiments, and each detail in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present application are used to describe specific embodiments, but not to limit the protection scope of the present application. The test methods not specified in the following embodiments are usually performed according to the conventional conditions or the conditions recommended by the manufacturers.

[0033] Please refer to Figures 1 to 13 It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the present specification are only used to describe the content disclosed in the present specification, to be understood and read by those skilled in the art, and do not limit the conditions under which the present application can be implemented, and therefore do not have technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "up", "down", "left", "right", "middle" and "one" used in the present specification are only for the convenience of clear description, and are not used to limit the scope of the present application, and the change or adjustment of the relative relationship without substantially changing the technical content is also considered as the scope of the present application.

[0034] When the embodiments give a numerical range, it should be understood that, unless otherwise stated by the present application, each numerical range and any numerical value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present application and the understanding of the prior art by those skilled in the art and the description of the present application can also use any method, equipment and material of the prior art similar or equivalent to the method, equipment and material described in the embodiments of the present application to implement the present application.

[0035] As Figures 1-2As shown, the core instrumentation system of Hualong-1 unit adopts integrated neutron assembly probe, which is made of Rhodium-103 and has a design life of 48 months. After two refueling periods of normal operation, all 46 integrated neutron assembly probes need to be replaced. During the first round of overhaul, the primary circuit is subjected to water pressure test, and the maximum pressure reaches 223 bar.g, while the design pressure of the integrated neutron assembly probe is only 172.3 bar.a, so it does not meet the pressure condition of the water pressure test. In addition, since there is no fuel assembly in the core during the test, the core instrument probe loses the circumferential support at the core site, and the fluid flow impact may cause the risk of damage to the core instrument probe. Therefore, during the first round of overhaul, the integrated neutron assembly probe needs to be replaced, and during each replacement process, the integrated neutron assembly probe and the integrated connecting cable connected therewith need to be removed and reinstalled.

[0036] The integrated neutron assembly probe on the same tube seat 800 of Hualong-1 unit includes four core probe assemblies 500, and the integrated connecting cable on the same tube seat 800 includes four cable assemblies 600, and the core probe assembly 500 and the cable assembly 600 are in one-to-one correspondence and are threadedly connected; each of the core probe assemblies 500 includes a bolt part 501; each of the cable assemblies 600 includes a nut part 601; the bolt part 501 of the core probe assembly 500 and the nut part 601 of the cable assembly 600 are threadedly connected; as Figure 2As shown, the size of the spacing M1 between two adjacent core detector assemblies 500 is 14.5mm; the first threaded fastening part 501 on the core detector assembly 500 is a hexagonal fastener, the distance M2 between opposite sides of the hexagonal fastener is 27mm, and the diagonal distance is 29mm after rounding, and the four first threaded fastening parts 501 are evenly distributed on a circle with a radius R1 of 30mm. However, because the torque position of the four core detector assemblies 500 is at the same height, the space between two adjacent core detector assemblies 500 is small, and a conventional wrench head cannot be positioned; at the same time, the distance between the core detector assembly 500 near the guide cylinder surrounding plate 700 and the guide cylinder surrounding plate 700 is close, for example, the distance L1 between the core detector assembly 500 and the guide cylinder surrounding plate 700 is less than or equal to the length of a conventional wrench, or the distance L1 between the core detector assembly 500 and the guide cylinder surrounding plate 700 cannot meet the range of rotating 90° when the conventional wrench is used to tighten the torque, for another example, the distance between the core detector assembly 500 near the guide cylinder surrounding plate 700 and the guide cylinder surrounding plate 700 is 238mm, so that the distance between the core detector assembly 500 near the guide cylinder surrounding plate 700 and the guide cylinder surrounding plate 700 is close, so that when the conventional wrench is used to tighten or loosen, there is serious interference with the wrench handle, and the conventional wrench cannot be used to successfully disassemble or assemble the core detector assembly 500 and the cable assembly 600. The temporary disassembly wrench used in the overhaul and engineering is directly polished and cut, and no effective mechanical evaluation is performed, and there is a risk of breaking the end of the wrench and introducing foreign matter into the core, so the present case provides a tool for disassembling or assembling an integrated neutron assembly detector and an integrated connecting cable.

[0037] As Figure 3 shown, hereinafter, the X direction is the width direction of the tool, the width direction of the protrusion 12, the Y direction is the length direction of the tool, the length direction of the protrusion 12, and the opening direction of the opening slot 110, and Z is the thickness direction of the tool, the thickness direction of the head body 11.

[0038] As Figure 3 shown in FIG. 4, the utility model provides a tool for disassembling or assembling a core detector assembly and a cable assembly, the tool comprises an opening head 10;

[0039] The opening head 10 comprises a head body 11, two protrusions 12 are vertically and protrudingly arranged on the first end surface 111 of the head body 11, and the two protrusions 12 and the head body 11 jointly enclose a semi-closed opening slot 110;

[0040] Wherein, the width of the protrusion 12 is less than a first threshold value, the width direction of the protrusion 12 is the direction in which the two protrusions 12 are close to each other, and the first threshold value is the minimum spacing between the threaded fastening parts of two adjacent core detector assemblies 500 or cable assemblies 600.

[0041] It should be noted that the material of the tool can be carbon steel or chromium vanadium steel or other higher strength materials. The threaded fastening part on the core probe assembly 500 is a first threaded fastening part 501, and the threaded fastening part on the cable assembly 600 is a second threaded fastening part 601, wherein one of the first threaded fastening part 501 and the second threaded fastening part 601 is a bolt part, and the other is a nut part matched with the bolt part. The bolt part is generally a four-angled, five-angled or six-angled bolt structure, and the nut part is generally a four-angled, five-angled or six-angled nut structure. The shape and size of the open slot 110 in the present case are designed according to actual needs to adapt to the threaded fastening part or other connecting part on the core probe assembly 500 or the cable assembly 600; the open slot 110 with a semi-closed structure helps the tool to be positioned and sleeved into the threaded fastening part more easily in a limited space; as shown in Figure 2 The width of each protrusion 12 is compressed to the minimum distance between the threaded fastening parts of the adjacent two core probe assemblies 500 or cable assemblies 600, i.e. less than 14.5 mm, for example, the relevant dimension is compressed to 8 mm, to ensure that it can be operated in a narrow space; the tool is subjected to mechanical test to meet the requirement of 50 NM torque on site, to ensure that the tool will not be damaged or the bolt will not be broken due to excessive torque during disassembly and assembly; according to the actual use scene, the disassembly and assembly tool of the core probe assembly 500 and its cable assembly 600 in the nuclear power core measurement system can adapt to the operation in a narrow space, improve the disassembly and assembly efficiency, enhance the mechanical properties and reduce the risk of foreign matter falling into the reactor pool.

[0042] As shown in Figure 3 As an optional embodiment of the present case, the open slot 110 is square-shaped, and the shape of the open slot 110 is optimized to better adapt to the threaded fastening part; the square-shaped open slot 110 provides better matching and stability, so that the connection between the tool and the threaded fastening part is more closely, improving the stability and safety of the disassembly and assembly process.

[0043] As an optional embodiment of the present case, the thickness of the protrusion 12 is the same as that of the head body 11, maintaining the consistency and stability of the overall structure of the tool, and the uniform thickness helps to reduce stress concentration, improve the durability and reliability of the tool, prolong the service life of the tool, and reduce potential problems caused by inconsistent structure.

[0044] As shown in Figures 9-10As shown in the figure, as an optional embodiment of the present application, the width of the protruding block 12 is less than or equal to 12mm, the width of the opening slot 110 is greater than the minimum width of the threaded fastening part and less than the maximum width of the threaded fastening part, because the spacing between the two adjacent core probe assemblies 500 is less than or equal to the spacing between the two adjacent cable assemblies 600, and the minimum spacing between the two adjacent core probe assemblies 500 is 14.5mm, therefore, the width of the protruding block 12 is set to be less than or equal to 12mm, so that the protruding block 12 has a certain space between the two adjacent threaded fastening parts, so as to facilitate the disassembly of the tool to the core probe assembly 500 and its cable assembly 600, and improve the convenience and adaptability; the width of the opening slot 110 is greater than the minimum width of the threaded fastening part and less than the maximum width of the threaded fastening part, so as to adapt the opening slot 110 to the threaded fastening part.

[0045] As an optional embodiment of the present application, as shown in the figure, Figure 9 When the tool is used as a fixed wrench, the tool is adapted to the second threaded fastening part 601, the width of the opening slot 110 is 19mm≤X1≤21mm, for example X1 is 20mm; the width of the protruding block 12 is 11mm≤X2≤12mm, for example X2 is 11.5mm, the length of the opening slot 110 is 24mm≤X3≤26mm, for example X3 is 25mm, the thickness of the head body 11 is 6mm≤X6≤9mm, for example it can be 7mm, for example Figure 4 The related dimensions of the second wrench head 200 or the fourth wrench 400 in the figure can apply the size limit of this embodiment.

[0046] As an optional embodiment of the present application, as shown in the figure, Figures 9-10 When the tool is used as a disassembly wrench, the tool is adapted to the first threaded fastening part 501, the width of the opening slot 110 is 26mm≤X1≤28mm, for example X1 is 27mm; the width of the protruding block 12 is 7mm≤X2≤10mm, for example X2 is 8.5mm, the thickness of the head body 11 is 12mm≤X6≤16mm, for example it can be 14mm, for example Figure 4 The dimensions of the first wrench head 100 or the third wrench 300 in the figure can apply the size limit.

[0047] As an optional embodiment of the present application, the total length X5 of the tool is less than a second threshold value, and the second threshold value is the spacing between the core probe assembly 500 or the cable assembly 600 and the guide cylinder coaming 700. As shown in the figure, Figures 11-12As shown, the length dimension X5 of the third wrench 300 or the fourth wrench 400 is ≤238 mm, which allows the tool to rotate at least 90° to apply torque, thus avoiding the guide sleeve plate 700 to some extent. It should be understood that the tool needs to rotate at least 90° to apply torque, not necessarily 360°. Optionally, the dimension range of X4 is: 45 mm ≤ X4 ≤ 60 mm, thereby improving the structural strength of the tool.

[0048] In the three embodiments described above, the length direction of both the protrusion 12 and the opening groove 110 is the same as the opening direction of the opening groove 110, and this opening direction is perpendicular to the first end face 111. It should be noted that by defining the tool's geometric dimensions in detail, precise dimensions ensure a perfect match between the tool and the operated part, improving the accuracy and efficiency of the operation and reducing operational difficulties caused by improper dimensions.

[0049] like Figure 5 As shown in one embodiment of this case, the second end face 112 of the head body 11 is provided with a connecting portion 13, and a snap-fit ​​post 131 is provided on the connecting portion 13; wherein, the second end face 112 and the first end face 111 are arranged opposite to each other and parallel to each other. It should be noted that by providing the connecting portion 13, an interface for connecting other components (such as the digital torque bar 2) is provided, so that the tool can be expanded with its functions as needed, such as adding torque display, thereby increasing the functionality and flexibility of the tool.

[0050] like Figure 5 As shown, in an optional embodiment of this case, the connecting part 13 is arranged parallel to the protrusion 12 and is located between the extension directions of the two protrusions 12, and the connecting part 13 is arranged close to one of the protrusions 12. It should be noted that the reasonable arrangement of the position of the connecting part 13 is to ensure the overall balance and stability of the tool. The structural layout of the tool is optimized, the comfort and convenience of use are improved, and the user experience is enhanced, making the tool easier to operate.

[0051] like Figure 6 As shown, in an optional embodiment of this case, the tool further includes a digital torque bar 2 detachably connected to the connecting part 13, and / or a safety rope provided on the open head 10 for connecting to the digital torque bar 2 or for restraining the user's hand. It should be noted that the safety rope provides additional safety measures and functional options; the digital torque bar 2 can display the applied torque value in real time, while the safety rope provides additional safety during operation, preventing the tool from falling into the reactor pool and causing adverse effects, thus enhancing the tool's safety and functionality and meeting the needs of different working scenarios. The safety rope can be a metal chain or other rope that meets the requirements of the operating environment.

[0052] As shown in Figures 7-8 another embodiment of the present application, a rod 13 is integrally connected to the second end surface 112 of the head body 11, which is opposite to the first end surface 111 and parallel to the first end surface 111. It should be noted that the rod 13 provides a hand-holding part for the user, and since the rod 13 is integrally connected to the second end surface 112 of the head body 11, the structure is not too scattered to fall into the reactor pool and cause adverse effects, thereby enhancing the safety of the tool.

[0053] As shown in Figures 7-8 an optional embodiment of the present application, the rod 13 is a hollow structure 132, thereby reducing the weight of the tool and improving the convenience of the operator.

[0054] As shown in Figures 7-8 an optional embodiment of the present application, the rod 13 is provided with anti-slip patterns 131. It should be noted that the anti-slip patterns 131 can increase the friction of the hands, prevent slipping during use, increase the anti-slip performance of the rod 13, and improve the safety and comfort of the operation.

[0055] As shown in Figures 7-8 an optional embodiment of the present application, the rod 13 is provided with a restraint part 133 for restraining the hands of the user. It should be noted that the restraint part 133 provides additional safety measures to prevent the tool from accidentally falling during use. The restraint part 133 can be connected to the hands of the user or other safety equipment to provide double protection. For example, the restraint part 133 can be a through hole provided on the rod 13, which can be connected to the hands of the user by a safety rope to prevent the tool from falling.

[0056] As shown in Figure 13As shown, as an optional embodiment of the present case, the engaging member 4 includes a piece 41 matched with the opening slot 110 and a connecting part 42 capable of being attached to the head body 11, and the connecting part 42 is provided with a clamping hole 421 clamped with the clamping column 131. When the opening slot 110 is severely worn and difficult to use, the clamping hole 421 of the clamping member 4 can be installed on the clamping column 131, and the piece 41 of the clamping member 4 is matched and installed on the inner side of the opening slot 110, so that the clamping member 4 can compensate for the worn part of the opening slot 110, thereby prolonging the service life of the opening head 10. It should be understood that the size of the piece 41 matches the size of the inner side of the opening slot 110, the clamping member 4 is made of wear-resistant material to adapt to the current application environment, and the connecting part 42 is generally provided on only one side of the piece 41, so as to facilitate the installation of the clamping member 4.

[0057] The tool is suitable for installation and dismounting of the integrated neutron assembly probe and integrated connecting cable of the pressure vessel top cover ventilation cover support position during the engineering construction stage and overhaul period. The integrated neutron assembly probe is installed in the pile side connecting pipe 800 through the integrated cable, and the pile side connecting pipe 800 and the integrated connecting cable are sealed through a sealing nut, four cable assemblies 600 are distributed on one pile side connecting pipe 800, therefore, the positions of the four cable assemblies 600 to be dismounted or installed on one pile side connecting pipe 800 are fixed, the axial height of the joints of the four cable assemblies 600 to be dismounted or installed is consistent, so that the spacing between the adjacent pile core probe assemblies 500 is small, and the maximum outer diameter of the torque position of the probe is located at the first threaded fastening part 501 of the pile core probe assembly 500, the distance between the opposite sides of the hexagon at this position is 27mm, and the distance between the opposite sides after the round corner processing is 29mm. After the pile core probe assembly 500 is installed, the hard armored cable is connected above each assembly, and actually, the field gap between the first threaded fastening part 501 and the first threaded fastening part 501 is less than 14.5mm. Since the distance between the first threaded fastening part 501 and the inner side guide cylinder surrounding plate 700 is close, a standard wrench head cannot be inserted thereinto, and the temporary dismounting wrench used during the overhaul and engineering construction is directly polished and cut, without effective mechanical evaluation, and there is a risk that the end of the wrench breaks and foreign matters are introduced into the pile core. The wrench head of a set of tools of the present case considers the gap problem in the field, compresses the thickness of the wrench head to a predetermined thickness, and is subjected to mechanical test, so as to meet the requirement of 50NM torque in the field, meanwhile, considering that the use occasion is above the reactor pool, the dismounting rod and the customized rod are designed in an integrated manner, and are subjected to milling with a diameter of 15mm and surface net texture knurling, so as to meet the requirement of preventing foreign matters from falling.

[0058] In summary, the utility model effectively overcomes some practical problems in the prior art and has high utilization value and use significance.

[0059] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A tool characterized by, The utility model discloses a tool for disassembling and assembling a core probe assembly and a cable assembly, the tool comprising an open head; the open head comprises a head body, a first end surface of the head body is vertically provided with two protrusions, and the two protrusions and the head body jointly enclose a semi-closed open slot. The width of the protrusions is less than a first threshold value, the width direction of the protrusions is the direction in which the two protrusions are close to each other, and the first threshold value is the minimum distance between the threaded fastening parts of two adjacent core probe assemblies or cable assemblies.

2. The tool of claim 1, wherein, The open slot is square.

3. The tool of claim 1, wherein, The width of the protrusions is less than or equal to 12 mm, and the width of the open slot is greater than the minimum width of the threaded fastening part and less than the maximum width of the threaded fastening part.

4. The tool of claim 3, wherein, The total length of the tool is less than a second threshold value, and the second threshold value is the distance between the core probe assembly or cable assembly and the guide cylinder surrounding plate.

5. The tool of claim 1, wherein, A second end surface of the head body is provided with a connecting part, and the connecting part is provided with a clamping column; wherein the second end surface is arranged opposite to the first end surface and parallel to the first end surface.

6. The tool of claim 5, wherein, The connecting part is arranged parallel to the protrusions and located between the extension directions of the two protrusions, and the connecting part is arranged close to one of the protrusions.

7. The tool of claim 5, wherein, The tool further comprises a digital torque rod detachably connected to the connecting part, and / or a safety rope arranged on the open head and used for being connected to the digital torque rod or the hand of a user.

8. The tool of claim 1, wherein, The tool further comprises a rod body integrally connected to the second end surface of the head body, and the second end surface is arranged opposite to the first end surface and parallel to the first end surface.

9. The tool of claim 8, wherein, The rod body is provided with anti-slip patterns.

10. The tool of claim 8, wherein, The rod body is provided with a restraint part used for restraining the hand of a user.

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