CN111924704A

CN111924704A - Hoisting tool

Info

Publication number: CN111924704A
Application number: CN202010880240.0A
Authority: CN
Inventors: 薄涵亮; 姜胜耀; 张亚军; 王金海; 秦本科; 赵陈儒; 刘潜峰
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2020-11-13

Abstract

The invention relates to the technical field of mechanical installation tools, and provides a hoisting tool, which comprises: the clamping device comprises a first connecting piece, a second connecting piece, a clamping part and a hoisting part, wherein the first connecting piece is provided with an inserting hole with an opening at a first end of the first connecting piece; the clamping component is connected to the first end of the first connecting piece; the second connecting piece is sleeved outside the first connecting piece and can be switched between a first position and a second position relative to the first connecting piece, the clamping component is sleeved on the second connecting piece at the first position so as to be in a clamping state, and the clamping component is released from being sleeved on the clamping component at the second position so as to be in an opening state; the hoisting part is arranged on at least one of the first connecting piece and the second connecting piece. The hoisting tool provided by the invention can be used for hoisting a slender rod structure, and is simple in structure and simple and convenient to operate.

Description

Hoisting tool

Technical Field

The invention relates to the technical field of mechanical mounting tools, in particular to a hoisting tool.

Background

In the related technology of mechanical part installation, a structure with a large volume and a large weight in large-scale equipment needs to be hoisted, but hoisting parts (such as hoisting rings) are difficult to directly arrange on most mechanical parts, so that the mechanical parts are difficult to directly hoist. Taking the installation of a control rod in a nuclear reactor as an example, the control rod is inconvenient to arrange a lifting ring, and the problem that how to install the control rod is troubling technical personnel is solved.

The control rod of the nuclear reactor is connected with the slender rod structure and the driving shaft, the slender rod structure is a part of the rod position measuring structure, the slender rod structure is fixed at the end part of the driving shaft, the length of the slender rod structure is large, the installation precision requirement is high, and the assembly requirement of the slender rod structure cannot be met by the conventional assembly mode. In the related technology of mechanical component assembly, a special hoisting tool for the slender rod structure is not found, and the hoisting problem of the slender rod structure is troubled for a long time.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the hoisting tool provided by the invention can be used for hoisting the slender rod structure, and is simple in structure and simple and convenient to operate.

According to the embodiment of the invention, the hoisting tool comprises:

the first connecting piece is provided with a plug hole which is opened at the first end of the first connecting piece;

the clamping component is connected to the first end of the first connecting piece;

the second connecting piece is sleeved on the outer side of the first connecting piece and is arranged to be capable of being switched between a first position and a second position relative to the first connecting piece, the clamping component is sleeved on the second connecting piece at the first position so as to be in a clamping state, and the clamping component is released from being sleeved on the second connecting piece at the second position so as to be in an opening state;

and the hoisting part is arranged on at least one of the first connecting piece and the second connecting piece.

According to one 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.

According to one embodiment of the invention, the guide part comprises a guide section and a limiting section for limiting the positioning part, and the limiting section comprises a first limiting section and a second limiting section which respectively extend to one side of the guide section along the end part of the guide section.

According to an embodiment of the present invention, the first position-limiting section and the second position-limiting section are respectively provided with a fixing position for fixing the positioning portion.

According to an embodiment of the present invention, the positioning portion is a positioning screw fixed to the first connecting member, and the guide portion is a guide groove provided in the second connecting member.

According to one embodiment of the invention, the clamping member comprises a plurality of clamping members, the clamping members comprise 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, the other end of the clamping portion is provided with a clamping portion, the clamping portions are mutually folded at the first position, and the clamping portions are mutually unfolded at the second position.

According to an embodiment of the present invention, the connecting portion is fixed to the first connecting member, the clamping portions and the connecting portion are of an integral structure, and the clamping portions are elastically deformed to be closed or opened.

According to one embodiment of the invention, the first end of the first connecting piece is formed with a recess, the clamping piece is connected to the recess, and the thickness of the clamping piece is smaller than or equal to the depth of the recess.

According to one embodiment of the invention, at least one of the first connecting piece and the second connecting piece is provided with a handle.

According to one embodiment of the invention, the sling comprises a sling fixed to the second end of the first connecting member.

One or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

the hoisting tool provided by the embodiment of the invention comprises a first connecting piece, a second connecting piece, a clamping part and a hoisting part, wherein the second connecting piece can be adjusted between a first position and a second position relative to the first connecting piece, the clamping part is in an open state at the second position, at the moment, a workpiece to be hoisted can penetrate through the clamping part and be inserted into the inserting hole, then, the second connecting piece is adjusted to the first position, the clamping part clamps the workpiece to be hoisted, so that the workpiece to be hoisted is fixed with the hoisting tool, at the moment, the hoisting tool can be connected with the hoisting tool through the hoisting part, and the hoisting tool can hoist the workpiece to be hoisted, so that the hoisting tool is simple in structure and simple to operate.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a hoisting tool according to 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;

FIG. 2 is a schematic view of a portion of the position A in FIG. 1;

fig. 3 is a schematic cross-sectional view of a hoisting tool provided by an embodiment of the invention, in which the second connecting member is in a first position and the clamping member is in a clamping state;

FIG. 4 is a partially enlarged schematic view of the location B in FIG. 3;

figure 5 is a structural schematic diagram of a connecting part on a first connecting piece of the hoisting tool in an explosion state according to the embodiment of the invention;

figure 6 is a schematic structural view of a lifting tool according to an embodiment of the present invention, wherein the second connecting member is in a second position and the clamping member is in an open state;

FIG. 7 is a schematic bottom view of the structure of FIG. 6;

FIG. 8 is an enlarged partial schematic view of the C position of FIG. 6;

figure 9 is a schematic structural view of a lifting tool according to an embodiment of the present invention, in which the second connecting member is in the first position and the clamping member is in the clamping state;

fig. 10 is a schematic structural view of a hoisting part of the hoisting tool provided by the embodiment of the invention;

reference numerals:

1: a first connecting member; 11: inserting holes; 12: mounting holes; 13: a positioning part; 14: a recessed portion; 15: a first handle;

2: a second connecting member; 21: a guide portion; 211: a guide section; 212: a first limiting section; 213: a second limiting section; 214: a first fixed position; 22: a second handle;

3: a clamping member; 31: a clamping member; 311: a connecting portion; 312: a clamping portion; 313: a clamping part; 32: countersunk head screws;

4: a hoisting part; 41: a hoisting ring; 42: mounting a rod; 5: and (5) hoisting the workpiece.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

One embodiment of the present invention, as shown in fig. 1 to 10, provides a lifting tool, including: the clamping device comprises a first connecting piece 1, a second connecting piece 2, a clamping part 3 and a hoisting part 4, wherein the first connecting piece 1 is provided with an inserting hole 11 which is opened at a first end; the clamping part 3 is connected to the first end of the first connecting piece 1; the second connecting piece 2 is sleeved outside the first connecting piece 1, the second connecting piece 2 is arranged to be capable of being switched between a first position and a second position relative to the first connecting piece 1, in the first position, the second connecting piece 2 is sleeved with the clamping component 3 to enable the clamping component 3 to be in a clamping state, and in the second position, the second connecting piece 2 is released from being sleeved with the clamping component 3 to enable the clamping component 3 to be in an opening state; the hoisting part 4 is provided on at least one of the first connecting member 1 and the second connecting member 2.

When a workpiece 5 to be hoisted needs to be hoisted, at the moment, the hoisting tool is in a state of waiting to be hoisted, the second connecting piece 2 is adjusted from the first position to the second position, so that the clamping part 3 is in an open state, at the moment, the workpiece 5 to be hoisted penetrates through the clamping part 3 and is inserted into the insertion hole 11, then the second connecting piece 2 is adjusted from the second position to the first position, so that the clamping part 3 is folded under the sleeve pressure of the second connecting piece 2 to limit the workpiece 5 to be hoisted in the insertion hole 11, the hoisting tool is switched from the state of waiting to be hoisted to a hoisting state, the workpiece 5 to be hoisted is limited and fixed by the clamping part 3, and can move synchronously with the hoisting tool, and can be hoisted by a sling (such as a crane or a crane), so that the workpiece 5 to.

The first connecting piece 1 is provided with an inserting hole 11 with an opening at a first end thereof, so that a workpiece 5 to be hoisted can be inserted into the inserting hole 11 from the first end of the first connecting piece 1 and is fixed at the first end through the clamping part 3, the workpiece 5 to be hoisted is protected by the first connecting piece 1, and the abrasion of the workpiece 5 to be hoisted in the hoisting process is reduced. The length of the plug hole 11 can be adaptively adjusted according to the length of the workpiece 5 to be hoisted.

When the hoisting tool of this embodiment is not used, that is, in a state of waiting to be hoisted, the second connecting member 2 is adjusted to the first position, and at this time, the second connecting member 2 plays a role in protecting the clamping member 3. The switching of the second connecting piece 2 between the first position and the second position is realized through the relative movement of the second connecting piece 2 and the first connecting piece 1, at the moment, the first connecting piece 1 can be fixed, the second connecting piece 2 is adjusted, or the second connecting piece 2 is fixed, the first connecting piece 1 is adjusted, the structure is flexible, and the adjustment is simple and convenient.

The hoisting part 4 is connected to the first connecting piece 1 or the second connecting piece 2 and can be selected according to requirements; certainly hoist and mount portion 4 and can also set up respectively on first connecting piece 1 and second connecting piece 2, hoist and mount in a plurality of positions of accessible, hoist and mount position more nimble, various. The first connecting piece 1 and the second connecting piece 2 are both of sleeve structures, the shape of the inserting hole 11 is matched with that of the workpiece 5 to be hoisted, the cross section of the inserting hole 11 can be circular, oval or other shapes, the cross section is a section perpendicular to the axial direction of the sleeve, and the axial direction can refer to the length direction of the figure 1. The plug hole 11 can be a blind hole or a through hole, and the length of the plug hole 11 is larger than or equal to that of the workpiece 5 to be hoisted, so that the workpiece 5 to be hoisted can be inserted.

The hoisting tool of the embodiment can be applied to various workpieces 5 to be hoisted, and the size and the shape of the clamping part 3 can be designed according to the size and the shape of the workpieces 5 to be hoisted so as to meet the requirement of hoisting the workpieces 5 to be hoisted.

The following description will specifically describe the present embodiment by taking an example of applying the hoisting tool of the present embodiment to a control rod assembly in a nuclear reactor and hoisting a workpiece having a slender rod structure connected to an upper end of a drive shaft.

When the workpiece 5 to be hoisted is a control rod assembly, the control rod is connected with the slender rod structure and the driving shaft, and the splicing holes 11 are round holes matched with the slender rod structure. The lifting device of the embodiment is in a state to be lifted, the second connecting piece 2 is adjusted to the second position (that is, as shown in fig. 3 to fig. 1, the second connecting piece 2 is pulled upwards relative to the first connecting piece 1), the clamping part 3 is opened to insert the slender rod structure into the insertion hole 11 through the clamping part 3, after the slender rod structure is inserted into the insertion hole 11, the second connecting piece 2 is adjusted to the first position again (that is, as shown in fig. 1 to fig. 3, the second connecting piece 2 is pushed downwards), so that the clamping part 3 clamps the driving shaft, the fixing of the driving shaft and the lifting device is realized, and then the control rod connected to the driving shaft can be lifted through the lifting appliance, and the installation of the control rod is more convenient.

In one embodiment, as shown in fig. 1, 6, 8 and 9, 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 movable along the guide portion 21. The guide portion 21 is matched with the positioning portion 13 to guide the relative movement of the first connecting piece 1 and the second connecting piece 2, so that the stability of the relative movement of the first connecting piece 1 and the second connecting piece 2 is ensured.

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

The first connecting piece 1 and the second connecting piece 2 need to be kept stably and fixedly at the first position to ensure the safety and stability of the hoisting process, and the first connecting piece and the second connecting piece are fixed in a bolt, clamping or inserting mode and the like. The first connecting member 1 and the second connecting member 2 can be fixed at the second position by hand or external force, and the fixing manner of the first connecting member 1 and the second connecting member 2 at the second position is not limited herein.

In one embodiment, as shown in fig. 6 and 8, the guiding portion 21 includes a guiding section 211 and a limiting section for limiting the positioning portion 13, the limiting section limits the positioning portion 13 at 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 the positioning portion 13 is conveniently fixed.

The stopper section includes a first stopper section 212 and a second stopper section 213 that extend toward one side of the guide section 211 along an end of the guide section 211, respectively. The first position-limiting section 212 limits the positioning portion 13 at the second position, and the second position-limiting section 213 limits the positioning portion 13 at the first position, so that the first connecting member 1 and the second connecting member 2 can be stably fixed at two positions.

In one embodiment, the first and second position-limiting

segments

212 and 213 are respectively provided with fixing positions for fixing the positioning portion 13. That is, the fixing positions include 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 at the limiting section is improved.

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 in the second connecting member 2, so that the structure is simple and the installation is simple.

The first and second limiting

sections

212 and 213 form an included angle with the guiding section 211 to ensure that the positioning screw is limited at the end of the guiding portion 21. Referring to fig. 8, the guiding portion 21 is a C-shaped groove, the first limiting section 212 and the second limiting section 213 are located at two ends of the guiding portion 21, and the fixing position is a groove structure adapted to the shape of the positioning screw, so that the positioning screw is positioned at the fixing position, and the influence of the shake of the positioning screw on the connection stability between the first connecting member 1 and the second connecting member 2 is avoided. Referring to fig. 8, the fixing position is a groove structure protruding upward, so that the first connecting member 1 and the second connecting member 2 are hooked with each other.

An embodiment of the clamping member 3 is provided below.

In one embodiment, the clamping member 3 includes a plurality of clamping members 31, each 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, one end of each clamping portion 312 is connected to the connecting portion 311, and the other end of each clamping portion 312 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 unfolded to facilitate the workpiece 5 to be hoisted to be inserted into the inserting hole 11 through the clamping member 3. The connecting part 311 of the clamping piece 31 is fixedly connected with the first connecting piece 1, and the clamping part 312 is used for clamping and fixing the workpiece 5 to be hoisted, so that the structure is simple.

The shape of the clamping portion 313 is matched with the shape of the corresponding position of the workpiece 5 to be hoisted, which needs to be clamped and fixed, so as to ensure that the workpiece 5 to be hoisted is stably fixed. As shown in fig. 1 to 4, 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 driving shaft, so that the clamping portion 313 can be accurately clamped in the shaft groove of the driving shaft, and the fixing stability of the clamping component 3 to the driving shaft is ensured. The clamping portion 313 can be integrally formed with or detachably connected to the clamping portion 312, and the connecting manner of the clamping portion 313 is various and can be selected according to the requirement. When the clamping portion 313 and the clamping portion 312 are detachably connected, the clamping portion 313 can be replaced, so that the clamping component 3 can clamp and fix workpieces 5 to be hoisted in various specifications.

The periphery of the first connecting piece 1 is provided with at least two clamping pieces 31, and the number of the clamping pieces 31 can be adjusted according to actual needs. As shown in fig. 6 and 7, three clamping members 31 are provided on the outer periphery of the first connecting member 1, which is simple in structure and contributes to improvement of clamping stability.

In one embodiment, as shown in fig. 1 to 5, the connecting portion 311 is fixed to the first connecting member 1, the clamping portion 312 and the connecting portion 311 are of an integrated structure, the integrated structure is simpler, and the clamping portions 312 are mutually folded or mutually unfolded through elastic deformation, and the state conversion is performed through the elastic deformation, so that the connection relationship between the clamping member 31 and the first connecting member 1 is simpler.

The connecting portion 311 and the clamping portion 312 are of an integrated sheet structure, the connecting portion 311 is fixed on the first connecting member 1 through a countersunk head screw 32, at this time, the clamping member 31 is in a balanced state, and the clamping portion 312 is opened in the axial direction away from the first connecting member 1; the clamping part 312 is folded under the sleeving pressure of the second connecting part 2 of the clamping part 31 to clamp and fix the workpiece 5 to be hoisted, and at the moment, the second connecting part 2 completely sleeves the clamping part 31 to ensure the fixing effect of the clamping part 31 on the workpiece 5 to be hoisted.

In one embodiment, as shown in fig. 1 to 7, the first end of the first connecting member 1 is formed with a recess 14, the clamping member 31 is connected to the recess 14, and the thickness of the clamping member 31 is less than or equal to the depth of the recess 14. At the moment, the second connecting piece 2 is a through straight pipe, so that the structure is simple; the second connecting piece 2 is at the first position, and the second connecting piece 2 can accurately sleeve the outer side of the clamping part 3.

The concave portion 14 is formed in the cut-away portion of the first connecting member 1, and the shape of the concave 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, and the second connecting member 2 can be smoothly sleeved on the outer side of the clamping member 3.

In one embodiment, as shown in fig. 1 and 3, at least one of the first connector 1 and the second connector 2 is provided with a handle. During operation, the handle can be held for operation, so that the operation is simpler and more convenient.

The handle can be a rod structure connected to at least one of the first connecting piece 1 and the second connecting piece 2, and is simple in structure and convenient to process and mount.

In one embodiment, as shown in fig. 1 and 3, the first connecting member 1 is provided with the first handle 15, and the second connecting member 2 is provided with the second handle 22, so that both the first handle 15 and the second handle 22 can be used as the force acting point during operation, and the operation is flexible.

In one embodiment, as shown in fig. 1, 5 and 10 in combination, the sling 4 comprises a sling 41, the sling 41 being fixed to the second end of the first connecting member 1. The clamping part 3 is connected to the first end of the first connecting part 1 to fix the workpiece 5 to be hoisted, and the hoisting ring 41 is fixed to the second end of the first connecting part 1 to facilitate hoisting of the hoisting tool.

The first end and the second end of the first connecting member 1 are two ends in the length direction, respectively, and as shown in fig. 1, 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.

In one embodiment, the sling 4 further comprises a mounting rod 42, the hanging ring 41 is fixed on 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 in the mounting hole 12 of the first connecting member 1 through the thread to fix the sling 4. Hoisting portion 4 is fixed through threaded connection, makes things convenient for 4 dismouting of hoisting portion, and the hoisting portion 4 of removable different specifications is in order to adapt to the hoist and mount of multiple hoist.

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 hanging ring 41 is re-welded to the first connecting member 1, so as to improve the fixing stability of the sling 4.

In one particular embodiment, the lifting tool comprises: first connecting piece 1, second connecting piece 2, clamping member 3 and hoist and mount portion 4. The hoisting part 4 comprises a hoisting ring 41 and an installation rod 42 fixedly connected to the hoisting ring 41, the installation rod 42 is screwed in the installation hole 12 of the first connecting piece 1, and the hoisting ring 41 is welded with the second end (upper end) of the first connecting piece 1. The clamping component 3 comprises a clamping piece 31, the connecting part 311 of the clamping piece 31 is fixed on the first connecting piece 1 through a countersunk head screw 32 and is prevented from loosening through spot welding, and at the moment, the clamping part 312 of the clamping piece 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, and in the process that the second connecting member 2 is sleeved from the first end to the second end, the clamping portion 312 of the clamping member 31 is in a folded state under the sleeving pressure of the second connecting member 2. When the second connecting member 2 and the first connecting member 1 are sleeved, the positioning screw penetrates through the guide groove on the second connecting member 2 and is screwed and fixed on the first connecting member 1.

When the hoisting tool is in a state to be hoisted, the second connecting piece 2 is fixed at the second position, namely, the positioning screw is fixed in the first fixing position 214 of the first limiting section 212, the clamping piece 31 is in an open state, at the moment, the measuring rod section (the long and thin rod structure) can be inserted into the inserting hole 11 from the clamping part 3, the driving shaft is positioned outside the inserting hole 11, at the moment, the second connecting piece 2 is pulled downwards to the first position, and the clamping piece 31 is folded to clamp the driving shaft, so that a hoisting state is formed. After the hoisting is finished, the second connecting piece 2 is moved to be located at the second position, the clamping component 3 loosens the clamping and fixing of the driving shaft, and the hoisting tool is restored to be in a state to be hoisted. The above operation process can be performed by holding the first handle 15 or the second handle 22.

The hoisting tool in the embodiment realizes the hoisting function of the control rod, has the characteristics of simple structure and convenient operation, is suitable for hoisting control rods of various specifications, is particularly suitable for hoisting cross wing control rod assemblies, and solves the hoisting problem of the measuring rod section (slender rod structure) connected on the cross wing control rod.

Based on the working principle of a driving mechanism in a nuclear reactor, the characteristics of a built-in control rod driving wire of an advanced integrated small water reactor with the thermal power of less than 50MW and the assembly and disassembly experience, the hoisting tool in the embodiment not only meets the engineering application of the built-in water pressure driving technology of the control rod on the advanced small water reactor with the thermal power of less than 50MW, ensures the engineering application of the built-in water pressure driving technology of the control rod, provides reference for the engineering design of hoisting of a slender rod structure in other industrial fields, and can realize engineering and productization.

The hoisting tool of the embodiment is suitable for high-temperature, high-pressure and irradiation environments in a reactor pressure vessel where the driving mechanism is located. The driving mechanism sequentially drives the three hydraulic cylinders to transfer and clamps the two sets of pin claw mechanisms to move by adopting lifting, transferring and clamping, so that the functions of lifting, descending and dropping the control rod are realized.

The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.

Claims

1. A lifting tool, comprising:

2. A hoisting tool as claimed in claim 1, wherein one of the first and second connecting members is provided with a guide portion, and the other is provided with a positioning portion movable along the guide portion.

3. The hoisting tool of claim 2, wherein 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 which respectively extend to one side of the guide section along the end of the guide section.

4. The hoisting tool of claim 3, wherein the first and second limiting segments are respectively provided with a fixing position for fixing the positioning portion.

5. The hoisting tool of claim 3, wherein the positioning portion is a positioning screw fixed to the first connecting member, and the guide portion is a guide groove provided in the second connecting member.

6. A lifting tool as claimed in claim 1, wherein the clamping member comprises a plurality of clamping members, the clamping members comprise 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, the other end of the clamping portion is provided with a clamping portion, in the first position, the plurality of clamping portions are mutually closed, and in the second position, the plurality of clamping portions are mutually opened.

7. The hoisting tool of claim 6 wherein the connecting portion is secured to the first connecting member, the clamping portions are integral with the connecting portion, and the clamping portions are resiliently deformable to close or open each other.

8. A lifting tool according to claim 6, wherein the first end of the first connector is formed with a recess to which the clamping member is connected, the clamping member having a thickness less than or equal to the depth of the recess.

9. Hoisting tool according to any one of claims 1-8, wherein at least one of the first and second attachment members is provided with a handle.

10. Hoisting tool according to any one of claims 1-8, characterized in that the hoisting portion comprises a hoisting ring, which hoisting ring is fixed to the second end of the first connecting member.