CN117003104B - Lifting appliance and lifting method for lifting ring groove in cylindrical workpiece - Google Patents
Lifting appliance and lifting method for lifting ring groove in cylindrical workpiece Download PDFInfo
- Publication number
- CN117003104B CN117003104B CN202311279204.9A CN202311279204A CN117003104B CN 117003104 B CN117003104 B CN 117003104B CN 202311279204 A CN202311279204 A CN 202311279204A CN 117003104 B CN117003104 B CN 117003104B
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- supporting plate
- ring groove
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- 238000007789 sealing Methods 0.000 claims description 12
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- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 9
- 239000010935 stainless steel Substances 0.000 abstract description 9
- 238000010438 heat treatment Methods 0.000 abstract description 8
- 238000003466 welding Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 6
- 238000012546 transfer Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000004519 grease Substances 0.000 description 5
- 230000001050 lubricating effect Effects 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
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- 230000008602 contraction Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
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- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 240000004282 Grewia occidentalis Species 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 125000005619 boric acid group Chemical group 0.000 description 1
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- 229910052802 copper Inorganic materials 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
Abstract
The invention discloses a lifting appliance for a lifting ring groove in a cylindrical workpiece and a lifting method. The lifting appliance comprises a mandrel, wherein a lifting part is arranged on the mandrel, a round platform part is arranged at the lower end part of the mandrel, at least two limit grooves are formed in the round platform part, and a supporting plate capable of being clamped in the limit grooves is arranged on each limit groove; the outside of dabber is equipped with the lantern ring, be equipped with the guide way of falling L type on the lantern ring, the backup pad can be followed the guide way and moved and be connected with the lantern ring rotation. The lifting appliance and the lifting method for the lifting ring groove in the cylindrical workpiece, provided by the invention, can meet the requirement of lifting of nuclear power key equipment made of stainless steel, are particularly suitable for heat treatment transfer in the welding process, can save the processing procedure and the material cost, avoid the waste and the error in the workpiece processing process, save the lifting time, improve the production efficiency, shorten the processing period and reduce the damage to the workpiece.
Description
Technical Field
The invention relates to the technical field of machining tools, in particular to a lifting appliance for lifting an annular groove in a cylindrical workpiece and a lifting method.
Background
The reactor coolant pump, i.e. the main pump, is the only continuously operating device in the main system of the nuclear power plant loop, being the heart of the nuclear power plant. The operation condition of the main pump is very harsh, and the medium is boric acid solution, which is a primary coolant of a primary loop of the nuclear power station with high radiation and certain corrosiveness and has the pressure of 152bar and the temperature of 290 ℃. In view of nuclear safety and environmental protection, it is required to manufacture a main pump with a small leakage amount and high operation reliability, and also in view of economy of long-term operation of a nuclear power plant, the main pump must be operated safely. The main pump bearing body is used as one of the key barrel-shaped parts forming the main pump, is a key part directly bearing high-speed rotary abrasion, has a service life of up to 60 years, and has the control of manufacturing technology, particularly welding technology process parameters, which is the key content of the nuclear power equipment industry. In the process of welding and overlaying the component, the welding heating temperature is required to be strictly controlled in order to ensure the qualification of welding products. Therefore, the welding and heating and heat preservation of the workpiece are required to be repeated for a plurality of times to meet the requirements. The invention considers the requirement of the lifting transfer process and explores a novel lifting appliance and a using method thereof.
At present, a threaded hole or a lifting lug is usually required to be machined on a workpiece for lifting the cylindrical part, so that the lifting method not only increases the manufacturing cost, but also causes deformation of the threaded hole and the lifting lug in the welding and heating processes easily, and the lifting appliance cannot be removed smoothly. Moreover, the general lifting appliance is mainly made of high-strength alloy steel materials, and cannot be directly used for the use requirement of lifting, heating and transferring of nuclear power key equipment made of stainless steel materials. Based on the research, developing a lifting appliance capable of being used for cylindrical stainless steel nuclear power products and a lifting method capable of reducing manufacturing cost is a key technology in manufacturing nuclear power main pump products and even products of the same type.
Disclosure of Invention
The invention aims at: aiming at the problems, the lifting appliance and the lifting method for the lifting ring groove in the cylindrical workpiece are provided, are used for lifting and transferring the cylindrical stainless steel nuclear power product, are convenient to install and dismantle, cannot influence the structure of the workpiece, not only ensure that the cylindrical stainless steel nuclear power product is prevented from being polluted by materials such as high-strength steel in the manufacturing process, but also reduce the economic cost in the manufacturing process.
The technical scheme adopted by the invention is as follows:
the lifting appliance comprises a mandrel, wherein a lifting part is arranged on the mandrel, a round platform part is arranged at the lower end part of the mandrel, at least two limit grooves are formed in the round platform part, and a supporting plate capable of being clamped in the limit grooves is arranged on each limit groove; the outside of dabber is equipped with the lantern ring, be equipped with the guide way of falling L type on the lantern ring, the backup pad can be followed the guide way and moved and be connected with the lantern ring rotation.
Alternatively, a sealing groove is formed in the mandrel, and a sealing ring is arranged in the sealing groove.
Alternatively, the supporting plate comprises a rotating part connected in the guide groove, a protruding limiting part is arranged below the rotating part, a positioning part is arranged above the rotating part, and the bottom surface between the limiting part and the positioning part is an inclined surface.
Alternatively, the positioning part comprises an upper top end and a lower top end, the angle of the upper top end is smaller than a right angle, and the lower top end is provided with an arc.
Alternatively, a first positioning hole is formed in the lantern ring, and an elastic pin is arranged in the first positioning hole; the support plate is provided with a second positioning hole, and a triangular notch is arranged in the direction of the second positioning hole towards the mandrel.
Alternatively, the lower end of the lantern ring is provided with a taper hole matched with the round platform part.
Alternatively, at least two groups of lugs are arranged on the lantern ring, each group of lugs comprises two lugs, the guide groove is formed in each lug, and each supporting plate is arranged between each group of lugs.
Alternatively, a detachable handle is arranged at the upper part of the mandrel.
A hoisting method for hoisting an annular groove in a cylindrical workpiece comprises the following steps:
step 1, descending a tool along the inner part of a workpiece, and enabling a supporting plate to enter a lifting ring groove through gravity;
step 2, lifting the mandrel, wherein the positioning part of the supporting plate is contacted with the step above the lifting ring groove, the supporting plate rotates along the rotating part, and the limiting part is clamped in the limiting groove;
step 3, the mandrel is lowered, the positioning part of the supporting plate is contacted with the step below the lifting ring groove, the supporting plate rotates along the rotating part, and the clamping is released;
and 4, moving the rotating part upwards along the reverse L-shaped kidney-shaped hole, and completing resetting of the supporting plate.
Optionally, the method further comprises the following steps:
step 3.1, continuously descending the mandrel, and after the limiting part is completely separated from the limiting groove, applying a rotating moment to a handle at the upper end of the mandrel to enable the mandrel to rotate until the inclined surface of the round platform part is positioned below the limiting part;
and 3.2, lifting the mandrel, wherein the limiting part is contacted with the inclined surface of the round platform part.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. the lifting appliance and the lifting method for the lifting ring groove in the cylindrical workpiece, provided by the invention, meet the use requirement of lifting, heating and transferring of nuclear power key equipment made of stainless steel, are particularly suitable for heat treatment and transferring in the welding process, utilize the existing lifting ring groove for lifting, can save processing procedures and material cost, avoid waste and errors in the workpiece processing process, save lifting time, improve production efficiency, shorten processing period, reduce damage to the workpiece, and avoid accidents caused by unreasonable engineering quality or design of lifting threaded holes or lifting lugs.
2. According to the lifting appliance and the lifting method for the lifting ring groove in the cylindrical workpiece, provided by the invention, the lifting appliance and the lifting method have the capability of coping with mechanical faults, and if the supporting plate cannot be completely reset due to mechanical faults such as thermal expansion and contraction of the workpiece, improper assembly and the like, lifting and resetting can be realized by utilizing the inclined plane of the round platform part, so that the problem that lifting screws cannot be taken out due to heating deformation of threaded holes is avoided.
Drawings
The invention will now be described by way of example and with reference to the accompanying drawings in which:
fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the mandrel.
Fig. 3 is a schematic structural view of the support plate.
Fig. 4 is a schematic structural view of the collar.
The marks in the figure: the device comprises a 1-mandrel, a 11-hoisting part, a 12-round platform part, a 13-limit groove, a 14-seal groove, a 2-support plate, a 21-rotating part, a 22-limit part, a 23-locating part, a 231-upper top end, a 232-lower top end, a 24-second locating hole, a 3-lantern ring, a 31-guide groove, a 32-first locating hole, a 33-taper hole, a 34-lug, a 4-elastic pin, a 5-hexagonal bolt, a 6-seal ring and a 7-handle.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.
Any feature disclosed in this specification may be replaced by alternative features serving the same or equivalent purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
1-4, a lifting appliance for lifting an annular groove in a cylindrical workpiece comprises a mandrel 1, wherein a lifting part 11 is arranged on the mandrel 1, a round platform part 12 is arranged at the lower end part of the mandrel 1, at least two limit grooves 13 are arranged on the round platform part 12, and a supporting plate 2 which can be clamped in the limit grooves 13 is arranged on each limit groove 13; the outside of dabber 1 is equipped with lantern ring 3, be equipped with the guide way 31 of falling L on the lantern ring 3, backup pad 2 can follow guide way 31 removal and lantern ring 3 rotation connection.
Specifically, the main body of the mandrel 1 is a cylindrical shaft, the mandrel 1 can be lowered and lifted through the lifting part 11, and specifically, the lifting part 11 is a lifting screw screwed on the axis of the upper end part of the cylindrical shaft through threads. The round platform part 12 protrudes outwards from the cylindrical shaft, and can limit the collar 3 due to the fact that the round platform part has a variable diameter, and the collar 3 is limited to move in the axial direction by being matched with gravity; in addition, the diameter of the support plate 2 is larger than that of the cylindrical shaft, so that the limit groove 13 can be provided, and a space is provided for supporting the support plate 2; secondly, because of the inclined plane, when the inclined plane is used for contacting with the supporting plate 2, the supporting plate 2 can rotate, and then the clamping with the limiting groove 13 is released, so that the lifting appliance is taken out. The limiting groove 13 can be used for clamping and supporting the supporting plate 2, further, the supporting force of the workpiece is transferred onto the mandrel 1, the workpiece is hoisted through the lifting mandrel 1, further, the contour of the limiting groove 13 takes a bus of the inclined surface of the round table as an inclined edge to form a right triangle, two right-angle sides of the contour represent the bottom surface and the side surface of the limiting groove 13, the right-angle sides representing the bottom surface are perpendicular to the axis of the mandrel 1, the right-angle sides representing the side edges are parallel to the axis, and the limiting groove 13 is piled up along the circumferential direction of the conical surface and is parallel to the axis of the central shaft. The support plate 2 can support the workpiece, and is engaged with the mandrel 1 to transmit the support force. In addition, the collar 3 provides a guide groove 31, which can control the steering of the support plate 2, specifically, the support plate 2 can move in the radial direction through an inverted-L-shaped transverse part, and further, after entering a workpiece, the workpiece is supported, the support plate 2 can be positioned through an inverted-L-shaped longitudinal part, and the support plate 2 is prevented from moving in the radial direction in the hoisting process, so that the support plate 2 is prevented from falling off; and by axially moving the support plate 2 to the inverted-L-shaped transverse portion, the contact positioning is enabled, and the tool is taken out. The L-shaped guide groove 31 considers the bearing point position of the supporting plate 2, and the length of the guide groove 31 is set to be a proper length so as to transfer the weight of a workpiece into the limit groove 13 of the mandrel 1, reduce the stress of the bolt and the supporting lug 34 and increase the overall rigidity of the lifting appliance.
Preferably, a certain fit clearance is arranged between the cylindrical outer surface of the mandrel 1 and the inner surface of the lantern ring 3, lubricating grease is filled, sliding fit between the cylindrical outer surface of the mandrel 1 and the inner surface of the lantern ring 3 along the axial direction and the circumferential direction is ensured, and the lubricating grease on the mandrel 1 can improve the smoothness of axial rotation and radial rotation and can also play a role in rust prevention. When the mandrel 1 is lifted in the axial direction, the conical outer surface of the mandrel 1 supports the lantern ring 3 for lifting; when the mandrel 1 rotates along the axial direction, the limiting groove 13 drives the lantern ring 3 to rotate through the supporting plate 2; when the mandrel 1 descends alone, the supporting plate 2 can be separated from the limiting groove 13 and enter the cylindrical surface of the mandrel 1, the mandrel 1 is rotated and lifted, and the conical outer surface can trigger the supporting plate 2 to be separated from the elastic pin 4, so that the supporting plate 2 is rotated and reset.
As another specific embodiment, the mandrel 1 is provided with a sealing groove 14, and a sealing ring 6 is disposed in the sealing groove 14. Because a certain fit clearance is arranged between the cylindrical outer surface of the mandrel 1 and the inner surface of the sleeve ring 3, and lubricating grease is filled, the sealing groove 14 and the sealing ring 6 can prevent the lubricating grease from being carried out in the relative movement of the mandrel 1 and the sleeve ring 3, and can also prevent the shaking collision between the central shaft and the sleeve ring 3.
As another specific embodiment, the support plate 2 includes a rotating portion 21 connected in the guide groove 31, a protruding limiting portion 22 is provided below the rotating portion 21, a positioning portion 23 is provided above the rotating portion 21, and a bottom surface between the limiting portion 22 and the positioning portion 23 is an inclined surface. Specifically, the steering part may be connected to the guide groove 31 through a rotation shaft; the limiting part 22 is used for being clamped in the limiting groove 13, so that the protruding limiting part 22 is arranged to be more convenient for being clamped in the limiting groove 13; the positioning part 23 is used for respectively contacting with the upper end step and the lower end step of the lifting ring groove, when contacting with the upper end step, lifting of the workpiece is realized, and when contacting with the lower end step, upward supporting force and rotating moment are provided, so that lifting and resetting of the supporting plate 2 are realized. In addition, the bottom surface between the limiting part 22 and the positioning part 23 is an inclined surface, and the bottom surface does not interfere with the inner surface of the workpiece, so that the support plate 2 can be ensured to steer.
As another specific embodiment, the positioning portion 23 includes an upper tip 231 and a lower tip 232, the angle of the upper tip 231 is smaller than a right angle, and the lower tip 232 is provided with an arc. Specifically, the right angle is approximated to reduce the work piece landing risk that the insufficient rigidity of fit-up gap or material leads to keep the summit to do benefit to the lifting by crane and bear, the circular arc can reduce the conflict, simultaneously convenient rotation. Preferably, the overall profile of the support plate 2 approximates a trapezoid, and the four-corner vertex positions thereof are respectively functionally optimized: the upper top 231 is provided with an approximate right angle of 80-85 degrees, the lower top 232 is provided with a small-radius circular arc and a small-length straight edge, so that the lifting appliance can conveniently descend smoothly, and the upper corner between the limiting part 22 and the positioning part 23 is provided with a circular arc or a chamfer so as to avoid interference with the outer circle of the lantern ring 3 in movement; and the limit part 22 replaces the vertex with an overhanging arc.
As another specific embodiment, the collar 3 is provided with a first positioning hole 32, and an elastic pin 4 is arranged in the first positioning hole 32; the support plate 2 is provided with a second positioning hole 24, and a triangular notch is arranged in the direction of the second positioning hole 24 towards the mandrel 1. When the support plate 2 is in place at the lifting position and in the process of gradually bearing the weight load of the workpiece, the elastic pin 4 is compressed by the weight of the workpiece and the support plate 2, and enters into the second positioning hole 24 in the support plate 2 through the triangular notch on the boundary of the support plate 2, so that the clamping with the elastic pin 4 is completed, and the clamping and positioning of the support plate 2 are realized. Specifically, a center pin is disposed in the elastic pin 4.
As another specific embodiment, the lower end portion of the collar 3 has a tapered hole 33 matching with the truncated cone 12. The lifting tool can conveniently enter the inner circle of a workpiece, the contact area of the mandrel 1 and the lantern ring 3 is increased, and the tapered outer surface of the mandrel 1 and the tapered inner surface of the lantern ring 3 can form sliding fit along the axial direction and the circumferential direction.
As another specific embodiment, the collar 3 is provided with at least two sets of lugs 34, each set of lugs 34 includes two lugs, the guide groove 31 is formed on each lug 34, and each support plate 2 is disposed between each set of lugs 34. Preferably, the upper inner surface of the lantern ring 3 is a cylindrical inner circular surface and is fixedly connected with the end surface of the conical inner circular surface of the lower part, the outer surface of the lantern ring 3 is symmetrically provided with lugs 34, the lugs 34 are arranged in groups and in parallel on the outer circle of the lantern ring 3, two parallel lugs 34 are arranged to form a movement space of the supporting plate 2, the side surface of each lug 34 is provided with an inverted L-shaped waist-shaped through hole, and the two groups of lugs 34 are connected through a round corner, so that stress concentration in the lifting and bearing process is reduced. Specifically, the rotating portion 21 of the supporting plate 2 is a through hole, the rotating portion 21 is connected with the guide groove 31 through a hexagonal bolt 5, the hexagonal bolt 5 penetrates through the supporting lug 34 and the supporting plate 2 from one side of the supporting lug 34 respectively, and then is in threaded connection with the other side of the supporting lug 34, the hexagonal bolt 5 can slide in the L-shaped waist-shaped hole, and the supporting plate 2 is driven to slide between the supporting lugs 34. The supporting plate 2 can be slidably connected in the guide groove 31, the weight of the workpiece borne by the supporting plate can drive the limiting part 22 to enter the limiting groove 13, and the weight of the workpiece is transferred to the inner surface of the limiting groove 13, so that the bearing load of the bolt and the supporting lug 34 is reduced, the movable degree of freedom of the supporting plate 2 is limited, and the overall rigidity of the lifting appliance is improved.
As another specific embodiment, the upper part of the mandrel 1 is provided with a detachable handle 7. A turning moment can be applied to the spindle 1 by means of the handle 7, causing the spindle 1 to turn so that the support plate 2 is located on the bevel of the spindle 1. Specifically, the handle 7 is screwed on the outer circle of one end of the cylindrical shaft through threads, and is symmetrically arranged.
The parts can be manufactured by low alloy steel, surface chromium plating treatment is needed, and cylindrical grinding is carried out to reach the roughness Ra0.8 before assembly, so that the uniformity of fit clearance is achieved, and good relative movement is ensured; the bolt, the nut and the flying screw are made of high-strength alloy steel, the sealing ring 6 is made of hydrogenated nitrile rubber with high wear resistance, high grease resistance and high ageing resistance, and the elastic pin 4 is made of high-elasticity stainless steel or nonferrous metals such as aluminum, copper and the like;
the supporting plate 2 is used as a hanger part directly contacting with a workpiece, the material of the hanger part is selected to meet the requirements of high strength and high hardness, and the stainless steel workpiece cannot be polluted, so that martensitic stainless steel with the brand number of 1Cr13 can be selected for manufacturing, and surface chromium plating is performed. The adoption of chromium plating can improve wear resistance and rust resistance and even pollute the stainless steel workpiece. The support plate 2 may be made of high-strength carbon steel.
A hoisting method for hoisting an annular groove in a cylindrical workpiece comprises the following steps:
step 1, descending a tool along the inner part of a workpiece, and enabling a supporting plate 2 to enter a lifting ring groove through gravity;
step 2, lifting the mandrel 1, wherein the positioning part 23 of the support plate 2 is contacted with the step above the lifting ring groove, the support plate 2 rotates along the rotating part 21, and the limiting part 22 is clamped in the limiting groove 13;
step 3, the mandrel 1 is lowered, the positioning part 23 of the support plate 2 is contacted with the step below the lifting ring groove, the support plate 2 rotates along the rotating part 21, and the clamping is released;
and 4, the rotating part 21 moves upwards along the inverted L-shaped guide groove 31, and the supporting plate 2 is reset.
Specifically, when the invention is used, the applicable size of the supporting plate 2 is required to be determined according to different sizes of products, the applicable bearing strength, especially the strength grade of a bolt is calculated according to different weights of workpieces, the safety total load of the lifting ring is required to be calculated according to the weights of the workpieces and the products, firstly, the position of the mandrel 1 is lowered through the lifting ring screw, so that a tool is fed into the adjacent area of the lifting ring groove on the inner circle of the workpiece, the supporting plate 2 slides down along the inner wall of the workpiece under the action of self gravity in the descending process of the mandrel 1, when the positioning part 23 of the supporting plate 2 passes through the upper step of the lifting ring groove of the workpiece and enters the middle part of the ring groove, the whole descending of the lifting tool is stopped, the slow lifting process is started, the upper top 231 of the positioning part 23 of the supporting plate 2 gradually approaches the upper step of the ring groove of the workpiece, the weight is started to bear, the lower top 232 of the limiting part 22 is limited to enter the limiting groove 13 and gradually approaches and touches the axial limiting surface in the limiting groove 13, at the moment, the supporting plate 2 is completely restrained to lose further degrees of freedom, the whole weight of the workpiece is borne in the lifting tool, and the product is driven to gradually lift along with the lifting of the lifting tool; after the lifting and transferring of the workpieces are completed by the lifting tool, the lifting tool slowly descends along with the lifting screw and the mandrel 1, wherein the supporting plate 2 is changed from a bearing state to an unloading state, at the moment, the supporting plate 2 gradually restores the freedom of movement and slowly slides down along the inner part of the lifting ring groove of the workpieces under the action of self gravity, when the supporting plate 2 touches the lower step of the lifting ring groove, the supporting plate 2 receives upward supporting force and rotating moment applied by the step, and the resetting is completed along the inverted L-shaped guide groove 31.
As another specific embodiment, the method further comprises the steps of:
step 3.1, continuing to descend the mandrel 1, and after the limiting part 22 is completely separated from the limiting groove 13, applying a rotating moment to the handle 7 at the upper end of the mandrel 1 to enable the mandrel 1 to rotate until the inclined surface of the round platform part 12 is positioned below the limiting part 22;
step 3.2, lifting the mandrel 1, wherein the limiting part 22 is contacted with the inclined surface of the round platform part 12.
In particular, when the lifting appliance descends and withdraws, if the supporting plate 2 cannot be completely reset due to mechanical failure, improper assembly and the like, or the supporting plate 2 and the lantern ring 3 are blocked in the workpiece lifting ring groove, the central shaft can be slowly lowered continuously to enable the supporting plate 2 to make relative axial movement along the limiting groove 13, when the supporting plate 2 is completely separated from the limiting groove 13, the handle 7 at the upper end of the central shaft is applied with a rotating moment to enable the central shaft to rotate, the supporting plate 2 is rotated above the conical outer circular surface on the central shaft, the central shaft is lifted through the lifting ring screw, and the supporting plate 2 can be pushed to release by utilizing the conical outer circular surface and reset is completed along the inverted L-shaped guide groove 31.
The invention provides a lifting appliance and a lifting method for a lifting ring groove in a cylindrical workpiece, which have the following working processes:
(1) The lifting appliance can smoothly lift cylindrical workpieces. According to the invention, the position of the mandrel 1 can be lowered through the eye screw, so that a tool is fed into a region near a lifting ring groove on the inner circle of a workpiece, meanwhile, the supporting plate 2 slides down along the inner wall of the workpiece under the action of self gravity in the central shaft descending process, when the positioning part 23 of the supporting plate 2 passes over the upper step of the ring groove of the workpiece, a slight prompt sound of a 'snap' can be emitted, the lifting tool can be stopped from descending and the slow lifting process can be started, the sharp angle at the upper top 231 of the positioning part 23 gradually approaches the upper step of the lifting ring groove of the workpiece, and further, the workpiece weight starts to be born and gradually lifted along with the lifting ring until the workpiece finishes the tasks of transferring, landing and the like, so that the manufacturing and the assembling of each part of the lifting tool is simple and convenient, has no special requirement, can be modified and copied according to different sizes, and has wide universality;
(2) The lifting appliance can realize evacuation after the workpiece is lifted. After each part of the lifting appliance finishes lifting and transferring a workpiece, the lifting appliance firstly slowly descends along with the lifting screw, wherein the supporting plate 2 is firstly converted from a bearing state to an unloading state, then slowly slides downwards along the inner wall of a lifting ring groove of the workpiece under the action of self gravity, when the positioning part 23 is separated from the upper step of the lifting ring groove and touches the lower step, the upper top 232 of the positioning part 23 can receive upward supporting force and rotating moment applied by the lower step to the positioning part, and then lifting and resetting are finished along the inverted L-shaped guide groove 31, so that the supporting plate 2 does not need to be normally reset by additional manual work, and the resetting is finished completely by virtue of the up-down movement and the gravity action of the lifting appliance, thereby avoiding the danger caused by the contact of operators with high-temperature workpieces;
(3) The invention has the capability of coping with mechanical faults. When the lifting appliance is withdrawn, if the supporting plate 2 cannot be completely reset due to mechanical faults such as thermal expansion and contraction of a workpiece, improper assembly and the like, or the supporting plate 2 and the lantern ring 3 are blocked in the lifting ring groove of the workpiece, the mandrel 1 can be continuously and slowly lowered to enable the supporting plate 2 to make axial relative movement with the central shaft along the length direction of the limiting groove 13, when the supporting plate 2 is separated from the limiting groove 13 and enters the cylindrical surface, the handle 7 at the upper end of the mandrel 1 is applied with a rotating moment to enable the mandrel 1, the supporting plate 2 and the lantern ring 3 to make relative rotation, and then the mandrel 1 is lifted by the lifting ring screw, the supporting plate 2 can be pushed by the conical excircle on the central shaft to separate from the clamp of the elastic pin 4, and lifting force and the rotating moment are applied to the supporting plate 2, so that the supporting plate 2 can be lifted and reset along the inverted L-shaped guide groove 31.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.
Claims (9)
1. A hoist that is used for lifting by crane annular in cylindric work piece, its characterized in that: the novel lifting type lifting device comprises a mandrel (1), wherein a lifting part (11) is arranged on the mandrel (1), a round platform part (12) is arranged at the lower end part of the mandrel (1), at least two limiting grooves (13) are formed in the round platform part (12), a supporting plate (2) which can be clamped in the limiting grooves (13) is arranged on each limiting groove (13), the supporting plate (2) comprises a rotating part (21) connected in a guide groove (31), a protruding limiting part (22) is arranged below the rotating part (21), a positioning part (23) is arranged above the rotating part (21), and an inclined surface is arranged on the bottom surface between the limiting part (22) and the positioning part (23); the outside of dabber (1) is equipped with lantern ring (3), be equipped with guide slot (31) of falling L type on lantern ring (3), rotation portion (21) are connected with lantern ring (3) rotation through pivot movable along guide slot (31).
2. A spreader for lifting a ring groove in a cylindrical workpiece as claimed in claim 1, wherein: a sealing groove (14) is formed in the mandrel (1), and a sealing ring (6) is arranged in the sealing groove (14).
3. A spreader for lifting a ring groove in a cylindrical workpiece as claimed in claim 1, wherein: the positioning part (23) comprises an upper top end (231) and a lower top end (232), the angle of the upper top end (231) is smaller than a right angle, and the lower top end (232) is provided with an arc.
4. A spreader for lifting a ring groove in a cylindrical workpiece as claimed in claim 1, wherein: a first positioning hole (32) is formed in the lantern ring (3), and an elastic pin (4) is arranged in the first positioning hole (32); the support plate (2) is provided with a second positioning hole (24), and a triangular notch is arranged in the direction of the second positioning hole (24) towards the mandrel (1).
5. A spreader for lifting a ring groove in a cylindrical workpiece as claimed in claim 1, wherein: the lower end part of the lantern ring (3) is provided with a taper hole (33) matched with the round platform part (12).
6. A spreader for lifting a ring groove in a cylindrical workpiece as claimed in claim 1, wherein: at least two groups of lugs (34) are arranged on the lantern ring (3), each group of lugs (34) comprises two lugs, the guide grooves (31) are formed in each lug (34), and each supporting plate (2) is arranged between each group of lugs (34).
7. A spreader for lifting a ring groove in a cylindrical workpiece as claimed in claim 1, wherein: the upper part of the mandrel (1) is provided with a detachable handle (7).
8. A hoisting method for hoisting an annular groove in a cylindrical workpiece is characterized by comprising the following steps of: use of a spreader for lifting a ring groove in a cylindrical workpiece according to claim 1, comprising the steps of:
step 1, descending a tool along the inner part of a workpiece, and enabling a supporting plate to enter a lifting ring groove through gravity;
step 2, lifting the mandrel, wherein the positioning part of the supporting plate is contacted with the step above the lifting ring groove, the supporting plate rotates along the rotating part, and the limiting part is clamped in the limiting groove;
step 3, the mandrel is lowered, the positioning part of the supporting plate is contacted with the step below the lifting ring groove, the supporting plate rotates along the rotating part, and the clamping is released;
and 4, moving the rotating part upwards along the inverted L-shaped guide groove, and completing resetting of the supporting plate.
9. The hoisting method for hoisting the ring groove in the cylindrical workpiece according to claim 8, wherein: the method also comprises the following steps:
step 3.1, continuously descending the mandrel, and after the limiting part is completely separated from the limiting groove, applying a rotating moment to a handle at the upper end of the mandrel to enable the mandrel to rotate until the inclined surface of the round platform part is positioned below the limiting part;
and 3.2, lifting the mandrel, wherein the limiting part is contacted with the inclined surface of the round platform part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311279204.9A CN117003104B (en) | 2023-10-07 | 2023-10-07 | Lifting appliance and lifting method for lifting ring groove in cylindrical workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311279204.9A CN117003104B (en) | 2023-10-07 | 2023-10-07 | Lifting appliance and lifting method for lifting ring groove in cylindrical workpiece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117003104A CN117003104A (en) | 2023-11-07 |
| CN117003104B true CN117003104B (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311279204.9A Active CN117003104B (en) | 2023-10-07 | 2023-10-07 | Lifting appliance and lifting method for lifting ring groove in cylindrical workpiece |
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| CN (1) | CN117003104B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN117003104A (en) | 2023-11-07 |
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