Control rod grabbing tool

Abstract

The utility model discloses a control rod grabbing tool which comprises a supporting frame, a lifting mechanism and a grabbing mechanism. A lifting through hole allowing the lifting mechanism to pass through is formed in the supporting frame. The lifting mechanism is suspended in the lifting through hole through one end of a first lifting rope, and the other end of the first lifting rope is installed on the lifting device in a winding mode. The grabbing mechanism comprises finger clamping jaws, a tensioning part, a driving assembly and an emergency unlocking assembly, the at least one finger clamping jaw is rotationally connected to the bottom end of the lifting mechanism, and the tensioning part is slidably connected to the interior of the lifting mechanism so as to control the finger clamping jaws to be unfolded and tensioned towards the outer side in the control rod or to be folded towards the inner side to be separated from the control rod. When the control rod moves downwards, the finger clamping jaw overcomes viscosity generated by impurities between the finger clamping jaw and the control rod, and the control rod moves downwards to enable the finger clamping jaw to be closed towards the center, so that the influence on the whole process is avoided, the working efficiency and safety are improved, the labor intensity is reduced, the life safety of workers is guaranteed, and the loss of equipment is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power control rod movement technical field especially relates to a control rod grabbing tool. BACKGROUND

[0002] Nuclear power plant daily work needs to shift the control rod related assembly inserted on the fuel assembly to meet the spent fuel transportation requirement, and the control rod related assembly is grabbed to carry out ultrasonic eddy current inspection, and the control rod on the next cycle fuel assembly to be put into the reactor is shifted before loading after the overhaul to meet the requirement that the control rod position in the reactor core is unchanged. Therefore, the development and application of the control rod related assembly nuclear power plant control rod related assembly switching tool play a very important role in the smooth daily and overhaul work of the nuclear power plant.

[0003] Some existing technologies disclose a nuclear power plant control rod related assembly switching tool, which comprises a support frame, a lifting structure, a grabbing head structure, the grabbing head structure comprising a mandrel and a grabbing head assembly arranged at the bottom of the mandrel, the grabbing head assembly being used for grabbing the component to be switched, a locking structure used for controlling the grabbing head assembly to clamp or release the component to be switched, a guide structure used for guiding the lifting movement of the component to be switched, a position detection component used for detecting the position of the component to be switched, and a position digital display screen electrically connected with the position detection component and used for displaying the height of the component to be switched. Through the cooperation between the lifting structure, the grabbing head structure, the locking structure, the guide structure, the position detection component and the position digital display screen, the reliable switching of the component to be switched such as the control rod related assembly is realized, the safety during the switching process of the component to be switched such as the control rod related assembly is ensured, the safety performance is improved, and the requirement of the operation of the related assembly in the nuclear power daily and overhaul work is met.

[0004] However, impurities may be adhered between the bottom end of the grabbing head structure of the grabbing tool and the control rod, so that the grabbing head structure cannot be turned to be close to each other, the control rod cannot be separated, and the whole process is seriously affected, and the safety is low. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem in that a control rod grabbing tool is provided.

[0006] The utility model discloses a technical scheme that solves its technical problem is: construct a control rod grabbing tool, include: support frame, elevating system and grab mechanism, be provided with the lifting through -hole of allowing elevating system to pass through in the support frame, elevating system is suspended in the lifting through -hole through one end of first sling, and the other end of first sling is installed on the lifting device around, grab mechanism includes: finger clamp claw, tensioner, drive assembly and emergency unlocking assembly, at least one finger clamp claw rotatory connection is in the bottom of elevating system, tensioner is connected in the elevating system inside sliding, to control the finger clamp claw and spread out and be tight in the control rod interior or inboard and gather and separate with control rod, drive assembly is detachably fixed installation on the elevating system with tensioner, emergency unlocking assembly is detachably installed on the support frame, and control tensioner moves down and makes finger clamp claw inboard and gather.

[0007] Further, the elevating system includes: an elevating frame, a sleeve and an outer ring sleeve, the elevating frame is connected to one end of the first sling, the sleeve is detachably fixedly installed on the elevating frame, the outer ring sleeve is slidingly and limitingly connected to the bottom end of the sleeve, an elastic member is arranged between the outer ring sleeve and the sleeve, and a containing cavity allowing the sleeve to continue to move downward is arranged between the outer ring sleeve and the sleeve.

[0008] Further, the drive assembly includes a vertical sliding and limiting fin on the elevating frame, and a driving member dragging the fin upward, the fin is detachably fixedly installed on the tensioner, the driving member is detachably installed on the support frame, and the fin is driven to slide on the elevating frame.

[0009] Further, the driving member includes: a mounting seat, a handle, a connecting rod and a lifting bracket, the mounting seat is detachably installed on the elevating mechanism, the handle is rotatably connected to the mounting seat, the connecting rod is fixedly connected to the end of the handle, one end of the lifting bracket is rotatably and slidingly connected to the connecting rod, and the other end of the lifting bracket is in contact with the fin.

[0010] Further, the emergency unlocking assembly includes: a limiting member and a pull ring, the limiting member is rotatably connected to the support frame, and the pull ring is bound to the limiting member through a second sling; pulling the pull ring makes the limiting member move into the lifting through -hole and be located below the outer ring sleeve.

[0011] Further, the limiting member includes: a limiting plate and a locking member, the limiting plate is rotatably connected to the support frame, a concave groove allowing the finger clamp claw and the control rod to pass through is formed in the limiting plate, the locking member is installed on the limiting plate and connected with the pull ring, and the turning of the limiting plate is limited.

[0012] Further, the emergency unlocking assembly further comprises a push block detachably fixedly connected with the tensioning piece on the upper part of the finger clamp, and an outward inclined surface is arranged on the side of the push block facing the finger clamp; when the tensioning piece continues to move downward, the inclined surface of the push block extrudes into the upper end of the finger clamp, so that the lower end of the finger clamp is inwardly converged and separated from the control rod.

[0013] Further, the tensioning piece comprises a mandrel and a tensioning block, the mandrel is slidably connected in the lifting mechanism, and the tensioning block is detachably arranged at the bottom end of the mandrel and in contact with the finger clamp.

[0014] Further, the lower end of the finger clamp is arranged in a circular arc shape.

[0015] Further, the support frame comprises a support and a plurality of guide plates, the plurality of guide plates are stacked and spaced apart and detachably or fixedly arranged on the support in the lifting direction of the lifting mechanism, and the lifting through hole is arranged on each guide plate.

[0016] The utility model discloses the following beneficial effects:

[0017] The emergency unlocking assembly is detachably arranged on the support frame, the tensioning piece is controlled to move downward to make the finger clamp converge inwardly. When impurities are adhered between the control rod and the unfolded finger clamp, the finger clamp cannot converge to the center under the action of gravity, or the driving assembly fails to drive the tensioning piece to move downward, the operator can make the tensioning piece continue to move downward through the emergency unlocking assembly, the tensioning piece that continues to move downward makes the finger clamp have more rotating space, the torque of the gravity of the control rod to the finger clamp is increased, the finger clamp overcomes the adhesion of impurities between the control rod, the control rod moves downward to make the finger clamp converge to the center, and the influence on the whole process is avoided, the working efficiency and safety are improved, the labor intensity is reduced, the life safety of the staff is ensured, and the equipment loss is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the utility model, the utility model will be further described below in combination with the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0019] In the drawings:

[0020] Figure 1 is the front view of the control rod grabbing tool in some embodiments of the utility model;

[0021] Figure 2 is a side view of the control rod grabbing tool in some embodiments of the utility model;

[0022] Figure 3 is a sectional view of the lifting mechanism in the utility model;

[0023] Figure 4 is the installation position schematic view of the pressing fin in the utility model;

[0024] Figure 5 is a sectional view of the push block in the utility model;

[0025] Figure 6 is a structure schematic view of the driving piece in the utility model;

[0026] Figure 7 is a structure schematic view of the limiting piece and the pull ring in the utility model;

[0027] Figure 8 is a top view of the control rod grabbing tool in some embodiments of the utility model.

[0028] Legend to the Figures

[0029] Support frame 1, lifting through hole 11, support piece 12, guide plate 13, lifting mechanism 2, lifting frame 21, sleeve 22, outer ring sleeve 23, elastic piece 24, containing cavity 25, grabbing mechanism 3, finger clamping jaw 31, tensioning piece 32, mandrel 321, tensioning block 322, driving assembly 33, pressing fin 331, driving piece 332, mounting seat 3321, handle 3322, connecting rod 3323, lifting bracket 3324, emergency unlocking assembly 34, limiting piece 341, limiting plate 3411, locking piece 3412, concave groove 3413, pull ring 342, second lifting rope 343, push block 344, first lifting rope 4. DETAILED DESCRIPTION

[0030] In order to have a clearer understanding of the technical features, objects and effects of the utility model, the specific implementation mode of the utility model will be described in detail by referring to the drawings. In the following description, it should be understood that the directions or position relations indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or position relations shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the technical scheme, and cannot be understood as indicating that the indicated device or element must have a particular direction, so it cannot be understood as a limitation on the utility model.

[0031] It also needs to be explained that unless there is an explicit provision and limitation, the terms such as "mounting", "connecting", "connecting", "fixing", "setting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located on another element, or there can be one or more intervening elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third" and the like can be explicitly or implicitly include one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In the following description, specific details are set forth such as specific system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application for purposes of explanation and not of limitation. However, it will be obvious to those skilled in the art that the present application can be practiced in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary details.

[0033] Please refer to Figures 1 to 5 The control rod grabbing tool in the first embodiment of the present application comprises a support frame 1, a lifting mechanism 2 and a grabbing mechanism 3. The support frame 1 is provided with a lifting through hole 11 allowing the lifting mechanism 2 to pass through. The lifting mechanism 2 is suspended in the lifting through hole 11 through one end of a first lifting rope 4, and the other end of the first lifting rope 4 is wound and installed on a lifting device. The grabbing mechanism 3 comprises a finger clamp 31, a tensioning piece 32, a driving assembly 33 and an emergency unlocking assembly 34. At least one finger clamp 31 is rotationally connected to the bottom end of the lifting mechanism 2. The tensioning piece 32 is slidingly connected inside the lifting mechanism 2 to control the finger clamp 31 to expand outwardly and be tensioned inside the control rod or to close inwardly and separate from the control rod. The driving assembly 33 is slidingly connected to the lifting mechanism 2 and detachably fixedly installed with the tensioning piece 32. The emergency unlocking assembly 34 is detachably installed on the support frame 1. The control of the downward movement of the tensioning piece 32 causes the finger clamp 31 to close inwardly.

[0034] The lifting device can be a winch or a crane. The first lifting rope 4 extended downward from the lifting device is installed at the tail end of the lifting mechanism 2. The lifting device retracts the first lifting rope 4 to drive the lifting mechanism 2 to move up and down in the lifting through hole 11 of the support frame 1.

[0035] The present application is rotatably connected to the bottom end of the lifting mechanism 2 through at least one finger clamp 31, and the tensioning member 32 is slidably connected inside the lifting mechanism 2. When the control rod is clamped, the tensioning member 32 is driven to slide in the lifting mechanism 2 by starting the driving assembly 33. The upwardly moving tensioning member 32 will spread the finger clamp 31 outwardly, and the spread finger clamp 31 will be tightly expanded in the inside of the control rod. Then the operator tightens the first lifting rope 4 by the lifting device, so that the first lifting rope 4 drives the lifting mechanism 2, the finger clamp 31, the tensioning member 32 and the driving assembly 33 to move upwardly together, and the finger clamp 31 drives the tightly fixed control rod to move upwardly in the support frame 1, so as to move or maintain the control rod. When the control rod is to be released, the operator releases the lifting device, and after the first lifting rope 4 moves the lifting mechanism 2, the finger clamp 31, the tensioning member 32, the driving assembly 33 and the control rod to a suitable position, the tensioning member 32 is driven downwardly by the driving assembly 33, the tensioning member 32 no longer blocks the finger clamp 31 to be closed to the center, and under the action of gravity, the control rod is separated from the finger clamp 31, and the control rod is installed to a designated position. The whole operation process is labor-saving, stable and convenient to operate, reduces the labor intensity, and improves the efficiency of dismounting and installing the control rod.

[0036] The present application is rotatably connected to the bottom end of the lifting mechanism 2 through at least one finger clamp 31, and the tensioning member 32 is slidably connected inside the lifting mechanism 2. When the control rod is clamped, the tensioning member 32 is driven to slide in the lifting mechanism 2 by starting the driving assembly 33. The upwardly moving tensioning member 32 will spread the finger clamp 31 outwardly, and the spread finger clamp 31 will be tightly expanded in the inside of the control rod. Then the operator tightens the first lifting rope 4 by the lifting device, so that the first lifting rope 4 drives the lifting mechanism 2, the finger clamp 31, the tensioning member 32 and the driving assembly 33 to move upwardly together, and the finger clamp 31 drives the tightly fixed control rod to move upwardly in the support frame 1, so as to move or maintain the control rod. When the control rod is to be released, the operator releases the lifting device, and after the first lifting rope 4 moves the lifting mechanism 2, the finger clamp 31, the tensioning member 32, the driving assembly 33 and the control rod to a suitable position, the tensioning member 32 is driven downwardly by the driving assembly 33, the tensioning member 32 no longer blocks the finger clamp 31 to be closed to the center, and under the action of gravity, the control rod is separated from the finger clamp 31, and the control rod is installed to a designated position. The whole operation process is labor-saving, stable and convenient to operate, reduces the labor intensity, and improves the efficiency of dismounting and installing the control rod.

[0037] Please refer to Figures 1 to 5 In some embodiments, the lifting mechanism 2 comprises a lifting frame 21, a sleeve 22 and an outer ring sleeve 23. The lifting frame 21 is connected to one end of the first lifting rope 4. The sleeve 22 is detachably and fixedly installed on the lifting frame 21. The outer ring sleeve 23 is slidably and limitedly arranged at the bottom end of the sleeve 22. The elastic member 24 is arranged between the outer ring sleeve 23 and the sleeve 22. The accommodating cavity 25 allowing the sleeve 22 to continue to move downwardly is arranged between the outer ring sleeve 23 and the sleeve 22.

[0038] The application is connected to one end of the first lifting rope 4 through the lifting frame 21, the sleeve 22 is detachably fixedly installed on the lifting frame 21, the outer ring sleeve 23 is slidingly and limitingly arranged at the bottom end of the sleeve 22, the elastic member 24 is arranged between the outer ring sleeve 23 and the sleeve 22, and the accommodating cavity 25 allowing the sleeve 22 to continue to move downward is arranged between the outer ring sleeve 23 and the sleeve 22. When the first lifting rope 4 releases the lifting frame 21, the sleeve 22, the outer ring sleeve 23 and the grabbing mechanism 3 downward, the accommodating cavity 25 allowing the sleeve 22 to continue to move downward is arranged between the outer ring sleeve 23 and the sleeve 22, the elastic member 24 arranged between the outer ring sleeve 23 and the sleeve 22 can absorb the impact force and gravity of the sleeve 22 transmitted to the outer ring sleeve 23, thereby protecting the control rod to a certain extent, reducing damage to the control rod and prolonging the service life of the control rod. When the grabbing mechanism 3 grabs the control rod and moves downward to the installation position, the accommodating cavity 25 can also reduce the impact force of the downward moving grabbing mechanism 3 and the control rod on the equipment, thereby further protecting the equipment, prolonging the service life and improving the safety.

[0039] Please refer to Figures 1 to 6 In some embodiments, the driving assembly 33 comprises the pressing fin 331 which is vertically sliding and limiting on the lifting frame 21, and the driving piece 332 which drags the pressing fin 331 to move upward, and the pressing fin 331 is detachably and fixedly installed on the tensioning piece 32; the driving piece 332 is detachably installed on the support frame 1, and drives the pressing fin 331 to slide on the lifting frame 21.

[0040] The application comprises the pressing fin 331 which is vertically sliding and limiting on the lifting frame 21, and the driving piece 332 which drags the pressing fin 331 to move upward, and the pressing fin 331 is detachably and fixedly installed on the tensioning piece 32; the driving piece 332 is detachably installed on the support frame 1, and drives the pressing fin 331 to slide on the lifting frame 21, so that the tensioning piece 32 is more stable when moving up and down through the pressing fin 331, the gravity acting on the tensioning piece 32 is further increased, the tensioning piece 32 can move downward more smoothly, the reaction speed when the finger clamping jaws 31 converge to the center is improved, and the accuracy of releasing the control rod is further improved. The tensioning piece 32 can be limited in the sleeve 22 through the pressing fin 331, so that the installed tensioning piece 32 is controlled, the labor intensity is reduced, and the operation is facilitated.

[0041] Please refer to Figures 1 to 6 In some embodiments, the driving piece 332 comprises the mounting seat 3321, the handle 3322, the connecting rod 3323 and the lifting bracket 3324, the mounting seat 3321 is detachably installed on the lifting mechanism 2, the handle 3322 is rotationally connected to the mounting seat 3321, the connecting rod 3323 is fixedly connected to the end of the handle 3322, one end of the lifting bracket 3324 is rotationally and slidingly connected to the connecting rod 3323, and the other end of the lifting bracket 3324 is in contact with the pressing fin 331.

[0042] The application is detachably installed on the lifting mechanism 2 through the mounting seat 3321, the handle 3322 is rotationally connected to the mounting seat 3321, the connecting rod 3323 is fixedly connected to the end of the handle 3322, one end of the lifting bracket 3324 is rotationally and slidingly connected to the connecting rod 3323, and the other end of the lifting bracket 3324 is in contact with the pressing fin 331. The operator rotates the handle 3322 clockwise, so that the handle 3322 drives the connecting rod 3323 to rotate clockwise synchronously, the top end of the lifting bracket 3324 is driven by the connecting rod 3323 to move upward on the connecting rod 3323, the lifting bracket 3324 moves upward and drives the pressing fin 331 in the lifting bracket 3324 to move upward together, the pressing fin 331 moves upward and drives the tensioning piece 32 to slide upward in the sleeve 22, the tensioning piece 32 moves upward and expands the finger clamping jaw 31 outward, the finger clamping jaw 31 is tensioned in the control rod, the clamping of the control rod is completed, then the mounting seat 3321 can be installed on the mounting seat 3321 by using a bolt, the rotation of the connecting rod 3323 is limited, the tensioning piece 32 and the finger clamping jaw 31 remain relatively stationary, then the first lifting rope 4 is tightened by the lifting device, the lifting mechanism 2, the grabbing mechanism 3 and the control rod move upward together, and maintenance or replacement is performed. When the control rod is to be released, the operator removes the limiting bolt, then rotates the connecting rod 3323 by the handle 3322 to return to the initial position, so that the lifting bracket 3324 returns to the initial position, without the limitation of the lifting bracket 3324, the pressing fin 331 and the tensioning piece 32 move downward under the action of gravity and return to the initial position, without the limitation of the tensioning piece 32, the finger clamping jaw 31 is close to each other and releases the control rod, and the whole process is more labor-saving, labor intensity is reduced, the tensioning piece 32 is easily lifted or lowered, and the maintenance efficiency of the control rod is further improved.

[0043] The limiting block at the lower side of the lifting bracket 3324 in contact with the pressing fin 331 is limited on the linkage rod of the lifting bracket 3324 by a bolt, the relative position between the pressing fin 331 and the lifting frame 21 can be adjusted by adjusting the position of the limiting block of the lifting bracket 3324, and the lifting bracket 3324 is suitable for more use environments.

[0044] Please refer to Figures 1 to 7 In some embodiments, the emergency unlocking assembly 34 includes a limiting piece 341 and a pull ring 342, the limiting piece 341 is rotationally connected to the support frame 1, and the pull ring 342 is bound to the limiting piece 341 by the second lifting rope 343. Pulling the pull ring 342 makes the limiting piece 341 move into the lifting through hole 11 below the outer ring sleeve 23.

[0045] The application is connected with the supporting frame 1 through the limiting piece 341, the pull ring 342 is bound on the limiting piece 341 through the second lifting rope 343, the pull ring 342 is pulled to move the limiting piece 341 into the lifting through hole 11, and the limiting piece 341 is located below the outer ring sleeve 23. When the driving assembly 33 cannot return to the initial position, impurities invade into the finger clamp jaw 31, the rotation of the finger clamp jaw 31 is limited, and the finger clamp jaw 31 cannot be separated from the control rod, the outer ring sleeve 23 is moved above the limiting piece 341 by using the lifting device, then the operator pulls the pull ring 342 upwards, the limiting piece 341 bound by the pull ring 342 and the second lifting rope 343 is turned over, the limiting piece 341 after turning over is clamped below the outer ring sleeve 23, then the operator moves the lifting frame 21 and the sleeve 22 downwards by using the lifting device, the outer ring sleeve 23 is blocked and kept stationary by the limiting piece 341, under the action of gravity, the lifting frame 21 and the sleeve 22 can overcome the elastic force of the elastic piece 24, the bottom end of the sleeve 22 enters the containing cavity 25, the tensioning piece 32 and the driving assembly 33 move downwards together with the lifting frame 21 and the sleeve 22, in this process, the operator does not need to rotate the handle 3322, the tensioning piece 32 can move downwards, the tensioning piece 32 no longer limits the finger clamp jaw 31, the finger clamp jaw 31 has enough space to turn over and close to the center, the finger clamp jaw 31 is separated from the control rod, the control rod after separation falls freely to the installation position, and then more use environments can be applied, the difficulty of maintenance is reduced, the operator is convenient, and the safety is improved.

[0046] Please refer to Figures 1 to 7 In some embodiments, the limiting piece 341 comprises: a limiting plate 3411 and a locking piece 3412, the limiting plate 3411 is connected with the supporting frame 1, and a concave groove 3413 allowing the finger clamp jaw 31 and the control rod to pass through is formed in the limiting plate 3411; the locking piece 3412 is installed on the limiting plate 3411 and connected with the pull ring 342, and the turning over of the limiting plate 3411 is limited.

[0047] The application is rotatably connected to the support frame 1 through the limiting plate 3411, and a concave groove 3413 allowing the finger clamping jaw 31 and the control rod to pass through is formed on the limiting plate 3411; the locking piece 3412 is installed on the limiting plate 3411 and connected with the pull ring 342 to limit the overturning of the limiting plate 3411. The inner diameter of the concave groove 3413 is smaller than the outer diameter of the outer ring sleeve 23, so that the limiting plate 3411 can block the outer ring sleeve 23, while the finger clamping jaw 31 and the control rod can pass through the concave groove 3413. The locking piece 3412 passes through the support frame 1, so that the locking piece 3412 limits the limiting plate 3411 in the vertical state. When an emergency occurs, the operator drives the locking piece 3412 to move through the pull ring 342 and the second lifting rope 343, so that the locking piece 3412 unlocks the limiting plate 3411. Without the limitation of the locking piece 3412, the limiting plate 3411 will overturn into the lifting hole 11 under the action of gravity and keep perpendicular to the support frame 1, thereby being applicable to more use environments, reducing the difficulty of maintenance, facilitating personnel operation and improving safety.

[0048] The locking piece 3412 can be a limiting pin passing through the support frame 1, which is blocked above the limiting plate 3411. After the limiting pin is pulled upward by the pull ring 342 and the second lifting rope 343, the limiting pin no longer blocks the limiting plate 3411, and the limiting plate 3411 automatically overturns into the lifting hole 11, thereby facilitating operation and reducing manufacturing cost.

[0049] Please refer to Figures 1 to 5 In some embodiments, the emergency unlocking assembly 34 further comprises a push block 344 detachably fixedly connected with the tensioning piece 32 on the upper part of the finger clamping jaw 31, and an outward inclined surface is arranged on the side of the push block 344 facing the finger clamping jaw 31. When the tensioning piece 32 continues to move downward, the inclined surface of the push block 344 extrudes into the upper end of the finger clamping jaw 31, so that the lower end of the finger clamping jaw 31 converges inward and separates from the control rod.

[0050] The application is provided with a push block 344 detachably connected with the tensioning piece 32 on the upper part of the finger clamp 31, and the push block 344 is provided with an outward inclined surface on the side facing the finger clamp 31. When the impurities adhered between the finger clamp 31 and the control rod restrict the overturning of the finger clamp 31, and the finger clamp 31 cannot be separated from the control rod, the operator can continue to rotate the handle 3322 counterclockwise after the handle 3322 and the connecting rod 3323 return to the initial position, so that the connecting rod 3323 drives the bracket 3324 to continue to move downward, and the push block 344 continues to move downward under the action of gravity without the restriction of the bracket 3324, the push block 344 enters between the upper part of the finger clamp 31 and the tensioning piece 32, so that the upper part of the finger clamp 31 overturns outward, and the lower part of the finger clamp 31 in contact with the control rod needs to overturn to the center and close, so that the finger clamp 31 is separated from the control rod, further expands the use range, is suitable for more emergency situations, reduces the labor intensity, is convenient to operate, and improves the safety.

[0051] Similarly, when the driving assembly 33 is damaged and the finger clamp 31 cannot be separated from the control rod, the operator can pull the second lifting rope 343 upward through the pull ring 342, so that the limiting plate 3411 overturns into the lifting through hole 11, and then the lifting device lowers the lifting mechanism 2 and the grabbing mechanism 3. Since the outer ring sleeve 23 is limited by the limiting plate 3411, the outer ring sleeve 23 remains stationary, and then the pressing fin 331 and the tensioning piece 32 can continue to move downward under the action of gravity, the push block 344 enters between the upper part of the finger clamp 31 and the tensioning piece 32, so that the upper part of the finger clamp 31 overturns outward, the lower part of the finger clamp 31 overturns to the center and closes, so that the finger clamp 31 is separated from the control rod, further expands the use range, is suitable for more emergency situations, reduces the labor intensity, is convenient to operate, and improves the safety.

[0052] Please refer to Figures 1 to 5 In some embodiments, the tensioning piece 32 comprises a mandrel 321 and a tensioning block 322, the mandrel 321 is slidingly connected in the lifting mechanism 2, and the tensioning block 322 is detachably mounted at the bottom end of the mandrel 321 and in contact with the finger clamp 31.

[0053] The application is connected in the lifting mechanism 2 through the core shaft 321 sliding connection, the tensioning block 322 can be detachably installed at the bottom end of the core shaft 321, and is in contact with the finger clamp jaw 31, the tensioning block 322 can be installed at the bottom end of the core shaft 321 through a threaded pair, or installed at the bottom end of the core shaft 321 through a bolt, the operation range of the tensioning piece 32 is extended by the core shaft 321, more use scenarios can be applied by changing the length of the core shaft 321, the tensioning block 322 can be detachably installed on the core shaft 321, so that the tensioning block 322 can be replaced in time after wear, further improve the safety and maintenance cost, and the operator is convenient for installation.

[0054] Please refer to Figures 1 to 5 In some embodiments, the lower end of the finger clamp jaw 31 is provided with a circular arc shape.

[0055] The application sets the lower end of the finger clamp jaw 31 to be a circular arc shape, which can reduce the adhesion of impurities, and when the tensioning piece 32 no longer blocks the turning of the finger clamp jaw 31, the circular arc-shaped outside can make the control rod more smoothly separate from the finger clamp jaw 31, the operation is more smooth, and the finger clamp jaw 31 on the circular arc-shaped outside is more wear-resistant, which can prolong the service life.

[0056] Please refer to Figures 1 to 8 In some embodiments, the support frame 1 comprises a support 12 and a plurality of guide plates 13, the plurality of guide plates 13 are stacked and spaced apart and detachably or fixedly installed on the support 12 along the lifting direction of the lifting mechanism 2, and the lifting through hole 11 is opened on each guide plate 13.

[0057] The application is connected through the plurality of guide plates 13 stacked and spaced apart and detachably or fixedly installed on the support 12 along the lifting direction of the lifting mechanism 2, and the lifting through hole 11 is opened on each guide plate 13, wherein the guide plate 13 can be more stable when lifting the control rod, avoiding the control rod shaking, improving the stability, the support 12 can cooperate with the equipment below, making the whole tool more stable after installation, the connection strength of the whole tool can be improved by connecting the plurality of guide plates 13 with the support 12, further improving the stability and safety. The lifting through hole 11 opened on the guide plate 13 can be modified according to the actual use, so that the lifting through hole 11 is more suitable for the relative use environment, and the application range is expanded.

[0058] It can be understood that the above embodiments only express the preferred embodiments of the utility model, the description is more specific and detailed, but it can not be understood as the limitation of the utility model patent scope; it should be pointed out that for ordinary skilled person in the art, the above technical features can be freely combined without departing from the concept of the utility model, and a number of modifications and improvements can be made, which belong to the protection scope of the utility model; therefore, any equivalent transformation and modification within the scope of the utility model patent claim should belong to the scope of the utility model patent claim.

Claims

1. A control rod gripping tool characterized by, The utility model relates to a kind of control rod support device, including: Support frame (1), lifting mechanism (2) and grabbing mechanism (3); The support frame (1) is provided with lifting through-hole (11) allowing lifting mechanism (2) to pass through; The lifting mechanism (2) is suspended in lifting through-hole (11) by one end of first sling (4), and the other end of first sling (4) is wound and installed on lifting device; The grabbing mechanism (3) includes: finger clamp jaw (31), tensioner (32), drive assembly (33) and emergency unlocking assembly (34), at least one finger clamp jaw (31) is rotatably connected to the bottom end of lifting mechanism (2), the tensioner (32) is slidably connected inside lifting mechanism (2) to control the finger clamp jaw (31) to expand outward and be tight in control rod or to inboard and separate from control rod;Drive assembly (33) is slidably connected to lifting mechanism (2) and detachably fixed with tensioner (32) installation;Emergency unlocking assembly (34) is detachably installed on support frame (1), controls tensioner (32) to move downward to make finger clamp jaw (31) inboard and close.

2. The control rod gripping tool of claim 1, wherein, The lifting mechanism (2) includes: lifting frame (21), sleeve (22) and outer ring sleeve (23), the lifting frame (21) is connected to one end of first sling (4), the sleeve (22) is detachably fixed on lifting frame (21), the outer ring sleeve (23) is slidably and position-limited at the bottom end of sleeve (22), and the elastic member (24) is arranged between the outer ring sleeve (23) and the sleeve (22), and the accommodating cavity (25) allowing the sleeve (22) to continue to move downward is arranged between the outer ring sleeve (23) and the sleeve (22).

3. The control rod gripping tool of claim 2, wherein, The drive assembly (33) includes vertical sliding and limiting fin (331) on lifting frame (21), and drive member (332) dragging fin (331) upward, and the fin (331) is detachably fixed on the tensioner (32);Drive member (332) is detachably installed on support frame (1), and drives fin (331) to slide on lifting frame (21).

4. The control rod gripping tool of claim 3, wherein, The drive member (332) includes: mounting seat (3321), handle (3322), connecting rod (3323) and lifting bracket (3324), the mounting seat (3321) is detachably installed on lifting mechanism (2), the handle (3322) is rotatably connected to the mounting seat (3321), the connecting rod (3323) is fixedly connected to the end of handle (3322), one end of lifting bracket (3324) is rotatably and slidably connected to connecting rod (3323), and the other end of lifting bracket (3324) is in contact with fin (331).

5. The control rod gripping tool of claim 2, wherein, The emergency unlocking assembly (34) comprises a limiting piece (341) and a pull ring (342), the limiting piece (341) is rotationally connected to the support frame (1), and the pull ring (342) is bound to the limiting piece (341) through a second lifting rope (343); the limiting piece (341) is moved into the lifting through hole (11) and located below the outer ring sleeve (23) by pulling the pull ring (342).

6. The control rod gripping tool of claim 5, wherein, The limiting piece (341) comprises a limiting plate (3411) and a locking piece (3412), the limiting plate (3411) is rotationally connected to the support frame (1), and a concave groove (3413) allowing the finger clamping jaw (31) and the control rod to pass through is formed in the limiting plate (3411); the locking piece (3412) is installed on the limiting plate (3411) and connected with the pull ring (342), and the overturning of the limiting plate (3411) is limited.

7. The control rod gripping tool of claim 6, wherein, The emergency unlocking assembly (34) further comprises a push block (344) detachably fixedly connected with the tensioning piece (32) on the upper part of the finger clamping jaw (31), and an outward inclined surface is arranged on the side of the push block (344) facing the finger clamping jaw (31); when the tensioning piece (32) continues to move downward, the inclined surface of the push block (344) is pressed into the upper end of the finger clamping jaw (31), so that the lower end of the finger clamping jaw (31) is inwardly converged and separated from the control rod.

8. The control rod gripping tool of claim 1, wherein, The tensioning piece (32) comprises a mandrel (321) and a tensioning block (322), the mandrel (321) is slidingly connected in the lifting mechanism (2), and the tensioning block (322) is detachably installed at the bottom end of the mandrel (321) and in contact with the finger clamping jaw (31).

9. The control rod grab tool of claim 1, wherein, The lower end of the finger clamping jaw (31) is arranged in a circular arc shape.

10. The control rod gripping tool of claim 1, wherein, The support frame (1) comprises a support piece (12) and a plurality of guide plates (13), the plurality of guide plates (13) are stacked and spaced apart and detachably or fixedly installed on the support piece (12) in the lifting direction of the lifting mechanism (2), and the lifting through hole (11) is formed in each guide plate (13).

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