Lifting tools

Abstract

The present invention relates to the technical field of mechanical installation tools, and provides a lifting tool, comprising: a first connecting member, a second connecting member, a clamping component and a lifting part, wherein the first connecting member is formed with a plug hole opened at the first end of the first connecting member; the clamping component is connected to the first end of the first connecting member; the second connecting member is sleeved on the outside of the first connecting member, and the second connecting member is configured to be switchable between a first position and a second position relative to the first connecting member, in the first position, the second connecting member sleeves the clamping component to put the clamping component in a clamping state, and in the second position, the second connecting member releases the sleeve of the clamping component to put the clamping component in an open state; the lifting part is arranged on at least one of the first connecting member and the second connecting member. The lifting tool provided by the present invention can be used for lifting a slender rod structure, has a simple structure, and is easy to operate.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical installation tools, in particular to a lifting tool. Background Art

[0002] In the related technologies of mechanical component installation, large-scale equipment with large volume and heavy weight need to be hoisted, but it is difficult to directly set hoisting components (such as lifting rings) on most mechanical components, which makes it difficult to directly hoist mechanical components. Take the installation of control rods in nuclear reactors as an example. It is not convenient to set lifting rings on control rods, so how to install control rods has become a problem that troubles technicians.

[0003] Among them, the control rod of the nuclear reactor connects the slender rod structure and the drive shaft. The slender rod structure is a part of the rod position measurement structure. The slender rod structure is fixed to the end of the drive shaft. The slender rod structure is long and requires high installation accuracy. The existing assembly method is difficult to meet the assembly requirements of the slender rod structure. In addition, no lifting tools dedicated to the slender rod structure have been found in the relevant technologies for assembling mechanical parts. The lifting problem of the slender rod structure has also long troubled technicians. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a lifting tool which can be used for lifting a slender rod structure, has a simple structure and is easy to operate.

[0005] A lifting tool according to an embodiment of the present invention includes:

[0006] A first connecting member having a plug hole formed therein and opening at a first end of the first connecting member;

[0007] A clamping member connected to the first end of the first connecting member;

[0008] a second connecting member, sleeved on the outer side of the first connecting member, and configured to be switchable between a first position and a second position relative to the first connecting member, wherein in the first position, the second connecting member sleeves the clamping member to put the clamping member in a clamping state, and in the second position, the second connecting member releases the sleeve of the clamping member to put the clamping member in an open state;

[0009] The hanging part is arranged on at least one of the first connecting member and the second connecting member.

[0010] According to an embodiment of the present invention, one of the first connecting member and the second connecting member is provided with a guide portion, and the other is provided with a positioning portion movable along the guide portion.

[0011] According to an embodiment of the present invention, the guide portion includes a guide segment and a limiting segment for limiting the positioning portion, and the limiting segment includes a first limiting segment and a second limiting segment respectively extending along the end of the guide segment toward one side of the guide segment.

[0012] According to an embodiment of the present invention, the first limiting section and the second limiting section are respectively provided with fixing positions for fixing the positioning portion.

[0013] According to an embodiment of the present invention, the positioning portion is a positioning screw fixed to the first connecting member, and the guiding portion is a guiding groove provided on the second connecting member.

[0014] According to one embodiment of the present invention, the clamping component includes a plurality of clamping members, and the clamping members include a connecting portion and a clamping portion, the connecting portion is connected to the first connecting member, one end of the clamping portion is connected to the connecting portion, and the other end is provided with a clamping portion, in the first position, the plurality of clamping portions are retracted together, and in the second position, the plurality of clamping portions are opened to each other.

[0015] According to an embodiment of the present invention, the connecting portion is fixed to the first connecting member, the clamping portion and the connecting portion are an integrated structure, and the clamping portions are mutually retracted or mutually opened through elastic deformation.

[0016] According to an embodiment of the present invention, a recessed portion is formed at the first end of the first connecting member, the clamping member is connected to the recessed portion, and the thickness of the clamping member is less than or equal to the depth of the recessed portion.

[0017] According to an embodiment of the present invention, at least one of the first connecting member and the second connecting member is provided with a handle.

[0018] According to an embodiment of the present invention, the lifting portion includes a lifting ring, and the lifting ring is fixed to the second end of the first connecting member.

[0019] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0020] The lifting tool provided by the embodiment of the present invention includes a first connecting piece, a second connecting piece, a clamping component and a lifting part. The second connecting piece can be adjusted between a first position and a second position relative to the first connecting piece. The second connecting piece is in the second position and the clamping component is in an open state. At this time, the workpiece to be lifted can be inserted into the plug-in hole through the clamping component. Then, the second connecting piece is adjusted to the first position, and the clamping component clamps the workpiece to be lifted so that the workpiece to be lifted is fixed to the lifting tool. At this time, the lifting tool can be connected to the lifting tool through the lifting part, and the lifting tool can lift the workpiece to be lifted. The structure is simple and the operation is simple.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a schematic cross-sectional structural diagram of a lifting tool provided by an embodiment of the present invention, in which the second connecting member is in a second position and the clamping member is in an open state;

[0024] Figure 2 yes Figure 1 A schematic diagram of the local enlarged structure of the A position in the middle;

[0025] Figure 3 is a schematic cross-sectional structural diagram of a lifting tool provided by an embodiment of the present invention, in which the second connecting member is in a first position and the clamping member is in a clamping state;

[0026] Figure 4 yes Figure 3 A schematic diagram of the local enlarged structure of position B in the middle;

[0027] Figure 5 It is a schematic structural diagram of an exploded state of a connecting component on a first connecting piece of a lifting tool provided by an embodiment of the present invention;

[0028] Figure 6 is a structural schematic diagram of a lifting tool provided by an embodiment of the present invention, in which the second connecting member is in a second position and the clamping member is in an open state;

[0029] Figure 7 yes Figure 6 Schematic diagram of the structure viewed from above;

[0030] Figure 8 yes Figure 6 A schematic diagram of the local enlarged structure of the C position in the middle;

[0031] Fig. 9 is a structural schematic diagram of a lifting tool provided by an embodiment of the present invention, in which the second connecting member is in a first position and the clamping member is in a clamping state;

[0032] Fig.10 It is a structural schematic diagram of a hoisting part of a hoisting tool provided in an embodiment of the present invention;

[0033] Reference numerals:

[0034] 1: first connecting member; 11: plug hole; 12: mounting hole; 13: positioning portion; 14: recessed portion; 15: first handle;

[0035] 2: second connecting member; 21: guide portion; 211: guide section; 212: first limiting section; 213: second limiting section; 214: first fixing position; 22: second handle;

[0036] 3: clamping member; 31: clamping member; 311: connecting portion; 312: clamping portion; 313: clamping portion; 32: countersunk screw;

[0037] 4: lifting part; 41: lifting ring; 42: mounting rod; 5: workpiece to be lifted. DETAILED DESCRIPTION

[0038] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0039] In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0040] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0041] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0043] One embodiment of the present invention, in combination with Figures 1 to 10 As shown, a lifting tool is provided, including: a first connecting member 1, a second connecting member 2, a clamping component 3 and a lifting portion 4, the first connecting member 1 is formed with a plug-in hole 11 opened at its first end; the clamping component 3 is connected to the first end of the first connecting member 1; the second connecting member 2 is sleeved on the outside of the first connecting member 1, and the second connecting member 2 is configured to be switchable between a first position and a second position relative to the first connecting member 1. In the first position, the second connecting member 2 is sleeved on the clamping component 3 so that the clamping component 3 is in a clamping state. In the second position, the second connecting member 2 releases the sleeve on the clamping component 3 so that the clamping component 3 is in an open state; the lifting portion 4 is arranged on at least one of the first connecting member 1 and the second connecting member 2.

[0044] When the workpiece 5 to be hoisted needs to be hoisted, at this time, the hoisting tool is in a waiting state, and the second connecting member 2 is adjusted from the first position to the second position, so that the clamping component 3 is in an open state. At this time, the workpiece 5 to be hoisted is passed through the clamping component 3 and inserted into the plug-in hole 11, and then the second connecting member 2 is adjusted from the second position to the first position, so that the clamping component 3 is contracted under the sleeve pressure of the second connecting member 2 to limit the workpiece 5 to be hoisted in the plug-in hole 11, and the hoisting tool is switched from the waiting state to the hoisting state, and the workpiece 5 to be hoisted is limited and fixed by the clamping component 3, and can move synchronously with the hoisting tool, and can be lifted by a hoisting device (such as a crane or a crane) to realize the transportation or installation of the workpiece 5 to be hoisted.

[0045] The first connecting member 1 is formed with an inserting hole 11 opened at the first end thereof, so that the workpiece 5 to be hoisted can be inserted into the inserting hole 11 from the first end of the first connecting member 1 and fixed at the first end by the clamping member 3, so that the first connecting member 1 protects the workpiece 5 to be hoisted and reduces the wear of the workpiece 5 to be hoisted during the hoisting process. The length of the inserting hole 11 can be adaptively adjusted according to the length of the workpiece 5 to be hoisted.

[0046] When the hoisting tool of this embodiment is not in use, it is in a state of waiting for hoisting, and the second connecting member 2 is adjusted to the first position, at which time the second connecting member 2 plays a role in protecting the clamping member 3. The switching of the second connecting member 2 between the first position and the second position is achieved by the relative movement of the second connecting member 2 and the first connecting member 1. At this time, the first connecting member 1 can be fixed and the second connecting member 2 can be adjusted, or the second connecting member 2 can be fixed and the first connecting member 1 can be adjusted. The structure is flexible and the adjustment is simple.

[0047] The hoisting part 4 is connected to the first connecting member 1 or the second connecting member 2, which can be selected according to the needs; of course, the hoisting part 4 can also be set on the first connecting member 1 and the second connecting member 2 respectively, and can be hoisted through multiple positions, and the hoisting positions are more flexible and diverse. The first connecting member 1 and the second connecting member 2 are both sleeve structures, and the shape of the plug hole 11 is adapted to the shape of the workpiece 5 to be hoisted. The cross-sectional shape of the plug hole 11 can be circular, elliptical or other shapes. The cross-sectional shape is a cross-sectional shape perpendicular to the axial direction of the sleeve, and the axial direction can refer to Figure 1 The insertion hole 11 may be a blind hole or a through hole, and the length of the insertion hole 11 is greater than or equal to the workpiece 5 to be hoisted, so that the workpiece 5 to be hoisted can be inserted.

[0048] The lifting tool of this embodiment can be applied to a variety of workpieces 5 to be lifted. The size and shape of the clamping component 3 can be designed according to the size and shape of the workpiece 5 to be lifted to meet the lifting requirements of the workpiece 5 to be lifted.

[0049] The present embodiment will be specifically described below by taking the application of the lifting tool of the present embodiment to a control rod assembly in a nuclear reactor and taking the lifting of a workpiece having a slender rod structure connected to the upper end of a driving shaft as an example.

[0050] When the workpiece 5 to be hoisted is a control rod assembly, the control rod connects the slender rod structure and the drive shaft, and the plug hole 11 is a round hole adapted to the slender rod structure. Figure 3 to Figure 1 As shown, the second connecting member 2 is pulled upward relative to the first connecting member 1), so that the clamping member 3 is opened to allow the slender rod structure to pass through the clamping member 3 and be inserted into the insertion hole 11. After the slender rod structure is inserted into the insertion hole 11, the second connecting member 2 is adjusted to the first position (that is, as shown in FIG. Figures 1 to 3 As shown, the second connecting member 2 is pushed downward) so that the clamping member 3 clamps the drive shaft to fix the drive shaft and the lifting tool, and then the control rod connected to the drive shaft can be lifted by the lifting tool, making the installation of the control rod easier.

[0051] In one embodiment, in combination Figure 1 , Figure 6 , Figure 8 and Fig. 9 As shown, one of the first connecting member 1 and the second connecting member 2 is provided with a guide portion 21, and the other is provided with a positioning portion 13 that can move along the guide portion 21. The guide portion 21 cooperates with the positioning portion 13 to guide the relative movement of the first connecting member 1 and the second connecting member 2 to ensure the stability of the relative movement of the first connecting member 1 and the second connecting member 2.

[0052] In the first position, the positioning portion 13 is positioned at the first end of the guide portion 21, and in the second position, the positioning portion 13 is positioned at the second end of the guide portion 21 to ensure the relative fixation of the first connecting member 1 and the second connecting member 2. The guide portion 21 determines the relative displacement and mutual positioning position of the first connecting member 1 and the second connecting member 2.

[0053] The first connector 1 and the second connector 2 need to be stably fixed in the first position to ensure safety and stability during the lifting process, such as by bolts, clamping or plugging. The first connector 1 and the second connector 2 can be fixed manually or by external force in the second position, and the fixing method of the first connector 1 and the second connector 2 in the second position is not limited here.

[0054] In one embodiment, in combination Figure 6 and Figure 8As shown, the guide portion 21 includes a guide section 211 and a limiting section for limiting the positioning portion 13. The limiting section limits the positioning portion 13 in the limiting section so that the first connecting member 1 and the second connecting member 2 are relatively fixed. The first connecting member 1 and the second connecting member 2 are limited and fixed by the limiting section. The structure is simple and it is convenient to fix the positioning portion 13.

[0055] The limiting section includes a first limiting section 212 and a second limiting section 213 respectively extending along the end of the guide section 211 to one side of the guide section 211. The first limiting section 212 limits the positioning portion 13 to the second position, and the second limiting section 213 limits the positioning portion 13 to the first position, so that the first connecting member 1 and the second connecting member 2 can be stably fixed in both positions.

[0056] In one embodiment, the first limiting section 212 and the second limiting section 213 are respectively provided with a fixing position for fixing the positioning portion 13. That is, the fixing position includes a first fixing position 214 and a second fixing position, the first limiting section 212 is provided with the first fixing position 214, and the second limiting section 213 is provided with the second fixing position, so that the first connecting member 1 and the second connecting member 2 are stably fixed at the first position and the second position, and the fixing stability of the positioning portion 13 in the limiting section is improved.

[0057] In one embodiment, the positioning portion 13 is a positioning screw fixed to the first connecting member 1, and the guide portion 21 is a guide groove formed on the second connecting member 2, which has a simple structure and is easy to install.

[0058] The first limiting section 212 and the second limiting section 213 form an angle with the guide section 211 to ensure that the positioning screw is limited at the end of the guide portion 21. Figure 8 As shown, the guide portion 21 is a C-shaped groove, the first limiting section 212 and the second limiting section 213 are located at both ends of the guide portion 21, and the fixed position is a groove structure adapted to the shape of the positioning screw, so that the positioning screw is positioned in the fixed position to prevent the positioning screw from shaking and affecting the connection stability of the first connecting member 1 and the second connecting member 2. Figure 8 As shown, the fixing position is a groove structure protruding upward, so that the first connecting member 1 and the second connecting member 2 can be hooked with each other.

[0059] An embodiment of the clamping member 3 is provided below.

[0060] In one embodiment, the clamping component 3 includes a plurality of clamping members 31, and the clamping member 31 includes a connecting portion 311 and a clamping portion 312. The connecting portion 311 is connected to the first connecting member 1, and one end of the clamping portion 312 is connected to the connecting portion 311, and the other end is provided with a clamping portion 313. In the first position, the plurality of clamping portions 312 are mutually folded to clamp the workpiece 5 to be hoisted, and in the second position, the plurality of clamping portions 312 are mutually opened to facilitate the insertion of the workpiece 5 to be hoisted into the plug hole 11 through the clamping component 3. The connecting portion 311 of the clamping member 31 is fixedly connected to the first connecting member 1, and the clamping portion 312 is used to clamp and fix the workpiece 5 to be hoisted, and the structure is simple.

[0061] The shape of the clamping portion 313 is adapted to the shape of the corresponding position of the workpiece 5 to be hoisted, so as to ensure that the workpiece 5 to be hoisted is stably fixed. Figures 1 to 4 As shown, the clamping portion 313 is a clamping block, and the shape of the clamping portion 313 is adapted to the shaft groove structure of the drive shaft, so that the clamping portion 313 can be accurately clamped in the shaft groove of the drive shaft to ensure the fixing stability of the clamping component 3 to the drive shaft. Among them, the clamping portion 313 can be integrally formed with the clamping portion 312 or detachably connected, and the connection method of the clamping portion 313 is diverse and can be selected according to needs. When the clamping portion 313 is detachably connected to the clamping portion 312, the clamping portion 313 can be replaced so that the clamping component 3 can clamp and fix various specifications of the workpiece 5 to be hoisted.

[0062] At least two clamping members 31 are provided on the outer periphery of the first connecting member 1, and the number of the clamping members 31 can be adjusted according to actual needs. Figure 6 and Figure 7 As shown, three clamping members 31 are arranged on the outer periphery of the first connecting member 1, which has a simple structure and helps to improve the clamping stability.

[0063] In one embodiment, in combination Figures 1 to 5 As shown, the connecting portion 311 is fixed to the first connecting member 1, and the clamping portion 312 and the connecting portion 311 are an integrated structure. The integrated structure is simpler, and the clamping portions 312 are contracted or opened by elastic deformation, and the state is changed by elastic deformation, so that the connection relationship between the clamping member 31 and the first connecting member 1 is simpler.

[0064] Among them, the connecting part 311 and the clamping part 312 are an integrated sheet structure, and the connecting part 311 is fixed to the first connecting member 1 by a countersunk screw 32. At this time, the clamping part 31 is in a balanced state, and the clamping part 312 is opened in the axial direction away from the first connecting member 1; under the sleeve pressure of the second connecting member 2, the clamping part 312 is retracted to achieve clamping and fixing of the workpiece 5 to be hoisted. At this time, the second connecting member 2 completely sleeves the clamping part 31 to ensure the fixing effect of the clamping part 31 on the workpiece 5 to be hoisted.

[0065] In one embodiment, in combination Figures 1 to 7 As shown, a recessed portion 14 is formed at the first end of the first connector 1, and a clamping member 31 is connected to the recessed portion 14, and the thickness of the clamping member 31 is less than or equal to the depth of the recessed portion 14. At this time, the second connector 2 is a through straight tube with a simple structure; the second connector 2 is in the first position, and the second connector 2 can be accurately sleeved on the outside of the clamping member 3.

[0066] Among them, the recessed portion 14 is formed by the cut-off part structure of the first connecting member 1, and the shape of the recessed portion 14 matches the shape of the clamping member 31, so that the clamping portion 312 can be embedded in the first connecting member 1, ensuring that the second connecting member 2 can be smoothly sleeved on the outside of the clamping member 3.

[0067] In one embodiment, in combination Figure 1 and Figure 3 As shown, at least one of the first connecting member 1 and the second connecting member 2 is provided with a handle. During operation, the handle can be held for operation, which makes the operation easier.

[0068] The handle may be a rod structure connected to at least one of the first connecting member 1 and the second connecting member 2 , which has a simple structure and is convenient for processing and installation.

[0069] In one embodiment, in combination Figure 1 and Figure 3 As shown, the first connecting member 1 is provided with a first handle 15, and the second connecting member 2 is provided with a second handle 22. During operation, both the first handle 15 and the second handle 22 can be used as fulcrums, and the operation is flexible.

[0070] In one embodiment, in combination Figure 1 , Figure 5 and Fig.10 As shown, the hoisting part 4 includes a hoisting ring 41, which is fixed to the second end of the first connecting member 1. The clamping member 3 is connected to the first end of the first connecting member 1 to fix the workpiece 5 to be hoisted, and the hoisting ring 41 is fixed to the second end of the first connecting member 1 to facilitate the hoisting of the hoist.

[0071] The first end and the second end of the first connecting member 1 are respectively the two ends of its length direction, and the Figure 1 As shown, the first end is the lower end of the first connecting member 1 , and the second end is the upper end of the first connecting member 1 .

[0072] In one embodiment, the hoisting part 4 further includes a mounting rod 42, the lifting ring 41 is fixed to one end of the mounting rod 42, the mounting rod 42 is provided with a thread, and the other end of the mounting rod 42 can be screwed into the mounting hole 12 of the first connecting member 1 through the thread to achieve the fixation of the hoisting part 4. The hoisting part 4 is fixed by a threaded connection, which is convenient for the disassembly and assembly of the hoisting part 4, and the hoisting parts 4 of different specifications can be replaced to adapt to the hoisting of various hoists.

[0073] In another embodiment, the difference from the above embodiment is that the mounting rod 42 is screwed and fixed to the first connecting member 1 , and the mounting rod 42 or the lifting ring 41 is welded to the first connecting member 1 to improve the fixing stability of the lifting part 4 .

[0074] In a specific embodiment, the hoisting tool includes: a first connecting member 1, a second connecting member 2, a clamping component 3 and a hoisting part 4. The hoisting part 4 includes a lifting ring 41 and a mounting rod 42 fixedly connected to the lifting ring 41, the mounting rod 42 is screwed into the mounting hole 12 of the first connecting member 1, and the lifting ring 41 is welded to the second end (upper end) of the first connecting member 1. The clamping component 3 includes a clamping member 31, and the connecting portion 311 of the clamping member 31 is fixed to the first connecting member 1 by a countersunk screw 32, and spot welded to prevent loosening. At this time, the clamping portion 312 of the clamping member 31 is in an open state; the second connecting member 2 is sleeved from the first end to the second end of the first connecting member 1. During the sleeve process of the second connecting member 2 from the first end to the second end, the clamping portion 312 of the clamping member 31 is in a retracted state due to the sleeve pressure of the second connecting member 2. When the second connecting member 2 and the first connecting member 1 are sleeved, the positioning screw passes through the guide groove on the second connecting member 2 and is screwed and fixed to the first connecting member 1.

[0075] When the lifting tool is in the waiting state, the second connecting member 2 is fixed in the second position, that is, the positioning screw is fixed in the first fixed position 214 of the first limit section 212, and the clamping member 31 is in the open state. At this time, the measuring rod segment (slender rod structure) can be inserted from the clamping member 3 and the measuring rod segment is inserted into the plug-in hole 11, and the drive shaft is located outside the plug-in hole 11. At this time, the second connecting member 2 is pulled downward to the first position, and the clamping member 31 is retracted to clamp the drive shaft to form a lifting state. After the lifting is completed, the second connecting member 2 is moved to the second position, and the clamping member 3 releases the clamping fixation of the drive shaft, and the lifting tool returns to the waiting state. Among them, the above-mentioned operation process can be performed by holding the first handle 15 or the second handle 22.

[0076] The hoisting tool in the above embodiment realizes the hoisting function of the control rod, has the characteristics of simple structure and convenient operation, is suitable for the hoisting of control rods of various specifications, and is particularly suitable for the hoisting of the cross-wing control rod assembly, and solves the hoisting problem of the measuring rod segment (slender rod structure) connected to the cross-wing control rod.

[0077] Based on the working principle of the driving mechanism in the nuclear reactor and the characteristics and installation and disassembly experience of the built-in control rod drive line of the advanced integrated small water reactor with thermal power less than 50MW, the lifting tool in the above embodiment not only meets the engineering application of the control rod built-in hydraulic drive technology in the advanced small water reactor with thermal power less than 50MW, ensures the engineering application of the control rod built-in hydraulic drive technology, but also provides a reference for the engineering design of the lifting of slender rod structures in other industrial fields, which can realize engineering and productization.

[0078] The lifting tool of this embodiment is suitable for the high temperature, high pressure and irradiation environment in the reactor pressure vessel where the driving mechanism is located. The driving mechanism uses three hydraulic cylinders for lifting, transferring and clamping to sequentially drive the transfer and clamping two sets of pin claw mechanisms to move, thereby realizing the step-up, step-down and rod-dropping functions of the control rods.

[0079] The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A lifting tool used for control rods in a nuclear reactor, characterized in that: include: A first connecting member, formed with a plug hole opened at a first end of the first connecting member, the control rod connects the slender rod structure and the driving shaft, the plug hole is a round hole adapted to the slender rod structure; A clamping member connected to the first end of the first connecting member; a second connecting member, sleeved on the outer side of the first connecting member, and configured to be switchable between a first position and a second position relative to the first connecting member, wherein in the first position, the second connecting member sleeves the clamping member to put the clamping member in a clamping state, and in the second position, the second connecting member releases the sleeve of the clamping member to put the clamping member in an open state; a hanging part, provided on at least one of the first connecting member and the second connecting member; The clamping component includes a plurality of clamping members, and the clamping member includes a connecting portion and a clamping portion, the connecting portion is connected to the first connecting member, one end of the clamping portion is connected to the connecting portion, and the other end is provided with a clamping portion, in the first position, the plurality of clamping portions are retracted to each other, and in the second position, the plurality of clamping portions are opened to each other; the clamping portion is a clamping block, and the shape of the clamping portion is adapted to the shaft groove structure of the driving shaft so that the clamping portion is accurately clamped in the shaft groove of the driving shaft to ensure the fixing stability of the clamping component to the driving shaft, the clamping portion is detachably connected to the clamping portion, and by replacing the clamping portion, the clamping component can clamp and fix workpieces to be hoisted of various specifications; A recessed portion is formed at the first end of the first connecting member, the clamping member is connected to the recessed portion, and the thickness of the clamping member is less than or equal to the depth of the recessed portion; the recessed portion is formed by a cut-away portion structure of the first connecting member, and the shape of the recessed portion matches the shape of the clamping member, so that the clamping portion can be embedded in the first connecting member, ensuring that the second connecting member can be smoothly sleeved on the outside of the clamping member.

2. The lifting tool according to claim 1, characterized in that: One of the first connecting member and the second connecting member is provided with a guide portion, and the other is provided with a positioning portion movable along the guide portion.

3. The lifting tool according to claim 2, characterized in that: The guide portion comprises a guide section and a limiting section for limiting the positioning portion, and the limiting section comprises a first limiting section and a second limiting section respectively extending along the end of the guide section toward one side of the guide section.

4. The lifting tool according to claim 3, characterized in that: The first limiting section and the second limiting section are respectively provided with fixing positions for fixing the positioning portion.

5. The lifting tool according to claim 3, characterized in that: The positioning portion is a positioning screw fixed to the first connecting member, and the guiding portion is a guiding groove provided on the second connecting member.

6. The lifting tool according to any one of claims 1 to 5, characterized in that: At least one of the first connecting member and the second connecting member is provided with a handle.

7. The lifting tool according to any one of claims 1 to 5, characterized in that: The hanging part comprises a hanging ring, and the hanging ring is fixed to the second end of the first connecting member.

Images