EP3507810A1 - Greifer mit dämpfungssystem zum greifen eines brennelementes - Google Patents
Greifer mit dämpfungssystem zum greifen eines brennelementesInfo
- Publication number
- EP3507810A1 EP3507810A1 EP17762061.4A EP17762061A EP3507810A1 EP 3507810 A1 EP3507810 A1 EP 3507810A1 EP 17762061 A EP17762061 A EP 17762061A EP 3507810 A1 EP3507810 A1 EP 3507810A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gripper
- housing
- inner part
- connecting element
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- B66C1/62—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 comprising article-engaging members of a shape complementary to that of the articles to be handled
- B66C1/66—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 comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/10—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements
- G21C19/105—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements with grasping or spreading coupling elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/50—Applications of limit circuits or of limit-switch arrangements
-
- 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
- B66C1/34—Crane hooks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Definitions
- the invention relates to a gripper with damping system for gripping a fuel assembly.
- the gripper of a fuel assembly loading machine capable of transporting fuel assemblies within a nuclear facility includes a housing for securing the gripper to the fuel assembly loading machine, such as a telescoping mast of the fuel assembly loading machine, and an inner member axially slidable within the housing is arranged.
- the inner part For gripping and settling a fuel assembly, the inner part is moved to a first end position.
- the inner part is in a second end position.
- On the inner part one or more movable between a gripping position and a release position pawl elements are arranged, which engage in a handle or bracket of the fuel assembly and thus establish a non-positive connection to the fuel assembly, while this depends on the pawl elements.
- the housing of the gripper has guide grooves, typically two guide grooves, in which stop elements fastened to the inner part, e.g. B. feather keys are guided.
- the guide grooves form a lower and upper mechanical stop for the stop elements in the first and the second end position of the inner part.
- a block gear engagement between the inner part and the housing is a block gear engagement in which a tooth depending on the position of the pawl elements - gripping position or release position - protrudes into one of the two recesses of the block teeth to reliably hold the pawl member in its respective position.
- a gripper spring arranged, which causes a bias of the inner part on the stop elements to the housing.
- each stop element lies on the lower stop of its guide groove and the block toothing engages in such a way that the catch element is held in its gripping position.
- the weight of the fuel assembly loading machine or its telescopic mast causes Zu- sammen outline the gripper spring, wodu rch moves the housing relative to the inner part to ubens n, until the keys abut the upper stop of the guide grooves and the inner part is in the first end position ,
- the block toothing opens and the clip elements can be opened, for example by means of a pneumatic piston.
- the foot of the fuel bundle may be at an interfering edge, for example at bearing support provided within a fuel pool, or at its upper edges or at so-called absorber wells, resulting in the handle or stirrup of the fuel assembly is no longer directly on the pawl element auflie, but from this iesem lifts. If the fuel assembly subsequently slips off the trailing edge, it is in free fall for a short time, i. H. it falls into the clinker elements of the gripper. The resulting shock loads the Tragstruktu r of the fuel assembly, the gripper and the fuel assembly loading machine dynamically. In such an overload case, damage to the fuel assembly, the gripper or the fuel assembly loading machine may occur.
- the gripper for gripping a fuel assembly comprises a housing for securing the gripper to a fuel assembly loading machine and an inner member disposed within the housing, wherein the inner member and the housing are slidably disposed in an axial direction such that the inner member between a first end position and a second end position is movable.
- the gripper comprises at least one movable between a gripping position and a release position pawl element.
- the gripper comprises a gripper spring, which is arranged in the axial direction between the housing and the inner part.
- the gripper spring biases the inner part relative to the housing and counteracts a movement of the inner part relative to the housing and / or the fuel assembly loading machine from the second end position and / or an intermediate position lying in the axial direction between the first and the second end position in the first end position.
- the gripper comprises a damping system.
- the damping system comprises at least a first connecting element for connecting the damping system to the housing of the gripper and a second connecting element for connecting the damping system to the inner part of the gripper or at least a first connecting element for connecting the damping system to the fuel assembly loading machine and a second connecting element for connecting the Damping system with the housing of the gripper or at least a first connecting element for connecting the damping system with the fuel assembly loading machine and a second connecting element for connecting the Dämp- system with the inner part of the gripper.
- the damping system comprises at least one spring element which is arranged on the first and / or the second connecting element such that there is a movement of the inner part relative to the housing and / or the fuel assembly loading machine from the intermediate position to the second end position or a movement the housing opposite to the fuel assembly loading machine counteracts during a movement of the inner part of the intermediate position to the second end position.
- the damping system has a first connection element for connecting the damping system to the housing and a second connection element for connecting the damping system to the inner part or a first connection element for connecting the damping system to the fuel element loading machine and a second connection element for connecting the damping system the housing or a first connecting element for connecting the damping system with the fuel assembly loading machine and a second connecting element for connecting the damping system with the inner part.
- the spring element is connected to or arranged on the first and / or second connecting element such that, provided that the first connecting element is connected to the housing or the fuel element loading machine and the second connecting element is connected to the inner part, a movement of the inner part opposite the housing or the fuel assembly loading machine and if the first connecting element with the fuel assembly loading machine and the second connecting element is connected to the housing, a movement of the housing relative to the fuel assembly loading machine during a movement of the inner part from the intermediate position to the second end position counteracts.
- the inner part and the housing are displaceable relative to one another in an axial direction, which corresponds to a vertical direction during operation of the gripper.
- the inner part has a stop element, which is guided in an axially extending recess of the housing and in the first end position on a first stop surface of the Recess, rests in a vertical orientation of the gripper to an upper stop surface. The first end position is taken during the gripping or settling of the fuel assembly.
- the inner part first sits on the fuel element and the weight of the fuel assembly loading machine or the telescopic mast on which the housing of the gripper is attached, then causes a compression of the gripper spring, so that the housing moves relative to the inner part down until the stop element on the first, upper abutment surface of the recess rests and the inner part is in the first end position.
- the first end position thus characterizes a maximum possible position of the inner part relative to the housing, in which a distance in the axial direction between the inner part and the housing is minimal.
- the gripper spring counteracts this movement of the inner part in the first end position.
- the second end position characterizes the maximum possible position of the inner part relative to the housing, which can occupy the inner part due to mechanical stops or the stop element, in which a distance between the inner part and the housing is maximum and which the inner part in the case of a occurring on the gripper Maximum overload can take. Due to the force of the gripper spring, the inner part is basically pushed away from the housing, wherein the gripper spring can not or only partially absorb the load occurring in the event of overload.
- the intermediate position characterizes the position of the inner part relative to the housing, which can occupy the inner part in normal operation, ie in trouble-free operation with normal load, during the transport of a fuel assembly, the lifting or lowering of the fuel assembly or during a run of the fuel assembly loading machine. Again, the inner part is pushed away by the force of the gripper spring of the housing.
- a damping system is now provided, whereby the inner part during transport or the vertical lifting or lowering of a fuel assembly not by mechanical stops or the stop
- the damping system is designed such that it responds in case of overload, so counteracts a movement of the inner part of the intermediate position in the second end position and thus damps movement of the inner part beyond the intermediate position. If the fuel element slips off during transport or lifting or lowering in the vertical direction and falls into the arranged on the inner part pawl element, the distance from the intermediate position to the second end position is available to intercept the case of the fuel assembly and the resulting shock to dampen.
- the gripper spring thus counteracts a vertically upward movement of the inner part, the damping system counteracts a downward movement of the inner part or of the housing.
- the force exerted by the gripper spring on the inner part acts in a vertical direction downwards
- the force exerted by the damping system on the inner part or the housing force acts in a vertical upward direction.
- the gripper spring acts during a movement of the inner part between the intermediate position and the first end position, the damping system during a movement of the inner part between the intermediate position and the second end position.
- Both the first and the second connecting element can be arranged both indirectly and directly on the housing of the gripper and / or the fuel assembly loading machine or on the inner part and / or the housing of the gripper and connected thereto. Due to the relative displaceability of the inner part relative to the housing and / or the
- Fuel element loading machine is also the first connecting element relative to the second connecting element relatively displaceable.
- the first Verbindu ngselement is moved relative to the second Verbindu ngselement so that their distance from each other changed.
- the first connecting element is preferably fastened with at least one fastening means to an inner or outer peripheral surface of the housing or the fuel-loading machine, in particular to a telescopic mast of the fuel-loading machine and / or the first connecting element is in a recess on the inner or Externally peripheral surface of the housing positively and non-positively stored and / or the first connecting element is formed as part of the fuel assembly loading machine or the housing, that is formed integrally with the fuel assembly loading machine.
- a Festungsmittel come various, well-known to those skilled fasteners, such as screws into consideration.
- a recess in the form of a groove in the outer or inner peripheral surface of the housing or the fuel assembly loading machine is introduced.
- Both the first and the second connecting element preferably comprises an annular plate, which completely surround the housing and / or the fuel assembly loading machine, in particular the telescopic mast of the fuel assembly loading machine, or the inner part and / or the housing.
- the annular plate can in turn be formed as part of the housing and / or the fuel assembly loading machine.
- the second connecting element comprises at least a first load introduction element, which is mounted in a recess on an outer peripheral surface of the inner part or is attached to the inner part.
- the load introduction element is used to initiate a load occurring on the inner part in the event of an overload in the damping system.
- the second connecting element comprises at least a first load introduction element and at least one second load introduction element, wherein the first load introduction element is mounted in the recess on an outer circumferential surface of the inner part and wherein the first load introduction element at least in the Intermediate position and / or in the second end position of the inner part rests against a second load introduction element in order to initiate a load occurring in the overload on the inner part via the first load introduction element in the second load introduction element and thus in the damping system.
- the first and second load instructions are tion element, which is in particular designed as an annular plate, in a contact area flat against each other, when the inner part is in the intermediate position.
- the first load introduction element is also formed in this case in particular by a stop element, which is mounted displaceably in the axial direction within a recess of the housing and rests in the first end position of the inner part on an upper stop surface of the recess. In normal operation, the first load introduction element abuts against the second load introduction element in the intermediate position. In case of overload and thus in the second end position, the first load introduction element bears against a lower stop surface of the recess.
- the first load introduction elements serve here, for example, the stop elements or feather keys of the gripper.
- the at least one spring element is preferably supported with a first end on the first connection element and with a second end on the second connection element, in particular on the first or second load introduction element.
- the first connection element forms a first stop surface for the first end of the spring element
- the second connection element forms a second stop surface for the second end of the spring element.
- the at least one spring element is thus arranged between the first and the second connecting element.
- a load occurring in the event of an overload is introduced into the damping system by the second connecting element coupled to the inner part, at least partially absorbed therein by compression of the at least one spring element and discharged into the housing and / or the fuel element loading machine via the first connecting element.
- the at least one spring element is biased such that a load acting on the damping system during normal operation does not compress the spring element. Only in case of overload, so when the force acting in the vertical direction is greater than the biasing force, the spring element is compressed.
- the at least one spring element is supported with a second end on a stop surface of the second connecting element facing away from the first connecting element.
- first Verbindu ngselement and the second connection element connecting means bar or immediacy bar releasably fixed to each other, the d the fixation in a movement of the inner part of the intermediate position in the second position is solvable.
- this is at least one spring element is biased such that a normal operation acting on Dämpfu ngssystem attacking load does not compress the spring element and compression of the spring element occurs only in case of overload.
- first connection element and / or the second connection element, in particular the second load introduction element have a convexly curved surface, that is to say a slightly spherical surface, or a plane or even surface which adjoins the recess of the housing and / or attached to the first load introduction element.
- a convexly curved surface an ideally pu nct- or l-shaped bearing surface of the first or second connecting element is achieved on the housing or on the first load introduction element, whereby the load introduction into the damping system and of the Damping system is improved in the housing of the gripper.
- the force acting in the overload case is thereby introduced perpendicularly to the surface and thus almost centrally into the damping system or into the first or second connecting element or into the load introduction element, so that additional loads caused by possible levers are avoided.
- the first and / or second connecting element, in particular the second load introduction element may be a first one
- the damping system preferably comprises at least one biasing element to r Vorspannu ng of the at least one spring element, which is arranged on the first Verbindu ngselement or fixed and against the second Verbindg ngselement movably stored or fixed to the second connection element and is mounted movably relative to the first connecting element.
- the at least one biasing element is formed in a structurally simple manner than a screw be whose shaft or the free end of the shaft is fixed ngselement in the first or second Verbindu and you rch an existing ngselement in the first or second Verbindu existing Du rchgangsö réelle in that a stop surface formed by the screw, in particular the head of the screw, bears on the first or second connecting element in a form-fitting and force-fitting manner.
- the screw thus biases, for example, the at least one spring element, which is arranged on the first connecting element, against the second connecting element or the at least one spring element which is disposed on the second connecting element, against the first connecting element.
- the biasing element or the screw forms a positive and non-positive connection with the first or second connecting elements, in that a stop surface of the pretensioning element or the screw, more precisely the screw head, forms a stop surface, which forms the stop First or second Verbindu ngselement hinterg matures and thus on a stop surface or rear grip surface of the first or second connecting element frictionally and positively abuts.
- the screw head can also form a stop surface for the at least one spring element itself, on which it is supported with a first or second end.
- the abutment surface of the biasing member In the intermediate position, the first end position and a movement of the inner part from the intermediate position to the first end position, the abutment surface of the biasing member abuts against the rear grip surface of the first or second connection element or at the first or second end of the at least one spring element.
- the abutment surface of the preload element lifts off from the abutment surface or the rear grip surface of the first and / or second connecting element and the at least one spring element is compressed.
- the damping system is arranged within the housing, wherein the first connecting element is mounted in a recess on an inner peripheral surface of the housing and wherein the second connecting element indirectly via a axially extending and within the housing extending holding element with the inside - Part is connected.
- the holding element is in particular an elongated rod, at the first lower end of the inner part and at its second upper end, the second connecting element is attached.
- the second connecting element preferably comprises at least a first, more preferably at least a first load introduction element and a second load introduction element, which are each arranged rotationally symmetrical about the holding element.
- the at least one spring element in turn is supported with a first end on the first connection element and with a second end on the second connection element, in particular the first or second load introduction element.
- a bias of the at least one spring element in normal operation is realized for example by a stop element arranged within the housing, on which the first or second connecting element is supported with a side surface facing away from the at least one spring element.
- the first load introduction element advantageously comprises an annular plate and / or the second load introduction element has a T-shaped cross section, wherein the second end of the at least one spring element is supported in particular on the T-shaped load introduction element.
- the first load introduction element is arranged on a leg of the T-shaped load introduction element, so that in overload the load on the Garele- element, which follows the movement of the inner part of the intermediate position to the second end position, ie in the vertical downward direction, in the first load introduction element and then transferred into the second load introduction element and the at least one spring element is compressed.
- the second load introduction element, on which the at least one spring element is supported by a first end abuts a stop element in normal operation in order to bias the at least one spring element.
- the damping system comprises at least two, in particular four spring elements, which are arranged distributed around the inner part and / or the housing or within the housing, in particular at regular intervals.
- the damping system comprises a spring element which is arranged concentrically around the inner part and / or the housing or within the housing concentrically about a central longitudinal axis of the housing and / or the inner part.
- the inner part or the housing serve in this case at the same time as a guide for the spring element.
- the at least one spring element is preferably a disc spring or a disc spring column, that is to say at least two disc springs arranged one behind the other in the axial direction.
- About number and layering of the individual disc springs to a disc spring column or a disc spring package can be the spring characteristic or the spring force set.
- Disc springs offer the advantage that - at- For example, compared to coil springs - a smaller space is required to set a comparable spring characteristic.
- the at least one spring element is advantageously arranged within a sleeve, in particular a frontally open sleeve.
- the gripper is under water.
- the sleeve there is also the advantage that in case of overload when compressing the spring water is displaced by a narrow annular gap on the open side of the sleeve, which causes an additional damping effect.
- the damping system may comprise a detection device which is designed in a structurally simple manner, for example as a switch which interrupts a circuit as soon as the damping system is active.
- FIG. 2 shows a gripper for gripping a fuel assembly with a damping system according to a first embodiment in a sectional view
- FIG. 3 shows a gripper for gripping a fuel assembly with a damping system according to a second embodiment in a sectional view
- 4 shows a gripper for gripping a fuel assembly with a damping system according to a third embodiment in a sectional view
- FIG. 5 shows a gripper for gripping a fuel assembly with a damping system according to a fourth embodiment in a sectional view
- Fig. 6 shows a gripper for gripping a fuel assembly with a damping system according to a fifth embodiment in a sectional view.
- Fig. 1 shows a lower part of a gripper 2 for the transport of a fuel assembly without damping system.
- the gripper 2 comprises a housing 4 for attaching the gripper 2 to a fuel assembly loading machine, in particular for attaching the gripper 2 to the telescopic mast of a fuel assembly loading machine.
- the gripper 2 comprises an inner part 6, which is arranged axially displaceable within the housing 4. For gripping and settling a fuel assembly, the inner part 6 is moved to a first end position El, which is shown in Fig. 1 right.
- the inner part 6 is in a second end position E2, which is shown in Fig. 1 left.
- On the inner part 6 one or more movable between a gripping position and a release position pawl elements 8 are arranged for gripping a fuel element, of which in Fig. 1 only one is shown.
- the pawl member 8 engages in a handle or bracket of the fuel assembly, so that the fuel assembly is held frictionally against the pawl member 8 during transport.
- the housing 4 of the gripper 2 has two guide grooves 10, within which two stop elements 12 fastened to the inner part 6, in the present case key springs, are displaceably guided in the axial direction A.
- the guide grooves 10 form a lower, mechanical stop surface 14a and an upper mechanical stop surface 14b for the stop elements 12, so that the inner part 6 can only be moved between the first end position E1 and the second end position E2 relative to the housing 4.
- a block toothing 16 is engaged, which the clinch kenelement 8 depending on the tooth position reliably holds in the gripping position or in the release position.
- a gripper spring 18 is arranged between the inner part 6 and housing 4, which biases the inner part 6 via the stop elements 12 relative to the housing 4. The gripper spring 18 counteracts a movement of the inner part 6 of the second end position E2 in the first end position El.
- the inner part 6 is thus opposite the housing 4 in the second end position E2.
- the gripper 2 so while gripping or letting go at the beginning or end of the transport, the fuel assembly is at the foot and the inner part 6 presses on the fuel assembly or its handle or bracket.
- the gripper spring 18 is compressed by the weight of the fuel assembly loading machine or its telescopic mast, causing the housing 4 moves relative to the inner part 6 down. This takes place until the feather keys 12 bear against the upper abutment surface 14b of the guide grooves 10 and the inner part 6 is in the first end position.
- the above-described gripper 2 has a damping system which dampens an overload occurring in the event of a fault or overload on the gripper and / or on the fuel-element loading machine or an additional energy caused by a fuel element falling into the latch element 8 degraded to avoid damage to the gripper, the fuel assembly loading machine or the support structure of the fuel assembly.
- Fig. 2 shows a gripper 2 with a damping system 20 according to a first embodiment.
- the basic construction of the gripper 2 corresponds to the features described above, so that reference is made here essentially to the above statements and only closer to the Differences is received.
- the situation is shown in normal operation, in which the inner part 6 is in an intermediate position Z, on the left half in Fig. 2, the situation is shown in the overload case, in which the inner part in the second End position E2 is located.
- the intermediate position Z is located in the axial direction A between the first and the second end position.
- the damping system 20 comprises a first connecting element 22 for connecting the damping system 20 to the housing 4 of the gripper 2 and a second connecting element 24 for connecting the damping system 20 with the inner part 6 of the gripper 2.
- the first connecting element 22 is formed as an annular plate which with a plurality of screws - not shown - is attached to an outer peripheral surface 26a of the housing 4 and the housing 4 completely encloses.
- the first connecting element 22 could also be held positively and non-positively in an annular recess on the outer circumferential surface 26a of the housing 4.
- the second connecting element 24 comprises at least one, in the present case four first load introduction elements 28, of which only two are visible in FIG.
- the second load introduction element 30 is in turn formed as an annular plate which surrounds the inner part 6 and the housing 4 completely.
- a surface 32 of the second load introduction element 30 facing the first load introduction elements 28 is designed as a convexly curved surface, so that the force is introduced perpendicularly to the surface 32 and thus almost centrally into the second load introduction element 30.
- each of the spring elements 34 is disposed in a sleeve 36, in particular to prevent the ingress of dirt into the spring chamber.
- the first load introduction elements 28 are each mounted in a recess 38 on an outer peripheral surface 40 of the inner part 6.
- the first load introduction elements 28 are advantageously formed by the stop elements 12 of the gripper, which for this purpose are extended outwards in order to allow contact with the second load introduction element 30.
- two additional stop elements or first load introduction elements 28 thus a total of four first load introduction elements 28 are provided to distribute the forces acting in the overload case on a total of four damping systems 20 and four spring elements 34.
- the depth of the recess 38 of the inner part 6 can be increased in order to absorb the higher bending moments due to the extension of the first load introduction elements 28 or feather keys to the outside.
- Each spring element 34 is supported at a first end on the first connection element 22 and at a second end on the second load introduction element 30 and is thus arranged in the axial direction between the first connection element 22 and the second connection element 24.
- the damping system 20 comprises four biasing elements 42 for biasing and guiding the spring elements 34.
- the biasing element 42 is in the present case in each case a screw whose shaft 44 is fixed with a free end to the second connecting element 24 and the second load introduction element 30. Opposite the first connecting element 22, the screw is movable. For this purpose, the head 46 of the screw extends through a passage opening 48 provided in the first connecting element 22 and is thus held positively and non-positively on the first connecting element 22.
- the pros clamping elements 42 and the screws each bias a spring element 34, which is arranged between the first connecting element 22 and the second connecting element 24, before. In addition, the spring elements 34 are guided by the biasing element 42 and the screw in the axial direction A.
- each first load introduction element 28 rests on the second load introduction element 30.
- Each spring element 34 or each plate spring column is designed and prestressed so that it is very stiff in normal operation and does not deflect, so that the basic kinematics and mode of operation of the gripper 2 is not changed.
- the block gear 16 is engaged. In case of overload, so when the acting load is greater than the bias, moves the inner part 6 with the attached load, ie the fuel assembly relative to the housing 4 from the intermediate position Z (Fig. 2: right) to the second end position E2 (Fig. 2: left) down.
- the thereby covered path of the inner part 6 corresponds to the time required to reduce the overload delay path and thus the Tellerfederhub.
- the movement of the inner part 6 from the intermediate position Z to the second end position E2 is damped.
- a mechanical stop serve a lower or upper stop surface 14a, b of the guide grooves 10.
- the guide grooves 10 are preferably extended to the Tellerfederhub down.
- the inner part 6 moves due to the bias of the spring elements 34 back up in initial position or in the intermediate position Z.
- the block teeth 16 is modified in such a way, for example, by additional teeth and recesses, that these also in response the damping system 20 remains engaged.
- FIG. 3 shows a further embodiment of a damping system 120, which substantially corresponds in construction and in the mode of operation to the embodiment illustrated in FIG. 2, so that reference is primarily made to this with regard to the design and the mode of operation.
- Identical features are identified by the same reference numerals, in Fig. 3 right is again the inner part 6 in the intermediate position Z shown in Fig. 3 left the overload case, in which the inner part 6 is in the second end position E2.
- the damping system 120 comprises a spring element 134 which is arranged concentrically around the housing 4 of the gripper 2.
- the housing 4 thus extends centrally through the spring element 134 or through the disc spring column and thus simultaneously serves as a guide for the spring element 134.
- only one sleeve 136 is provided which completely surrounds the spring element 134, the housing 4 and the inner part 6.
- the first connecting element 222 is mounted in a recess 250 formed on an outer circumferential surface 26 a of the housing 4.
- the second connecting element 224 comprises four first load introduction elements 228, which are mounted in a recess on the outer peripheral surface 40 of the inner part 6 and in turn are formed by the stop elements of the gripper 2.
- a second or further load introduction element is not necessary in this embodiment, since the damping system 220 is not mounted outside of the housing 4, but in the recess 250 and the first load introduction elements 228 thus directly with the spring elements 234, in the present example again four spring elements 234 of which again only two are shown, can work together. With this construction, a significantly more compact design of the damping system 220 can be achieved, since these It is offset inwardly and not or only slightly protrudes from the outer peripheral surface 26a of the housing 4.
- the biasing members 242 to r Vorspannu ng of the individual spring elements 234 are in turn be designed as screw u nd each ngselement 222 with its shaft 244 fixed to the first Verbindu.
- the screw or its shank 244 extends in each case through a passage opening 248 of the second connecting element 224 or the first load introduction elements 228.
- a stop surface formed by the head 246 is positively and non-positively connected to the second connecting element 224 or the first load introduction element 228.
- the head 246 lifts upwards from the second connecting element 224 or the first load introduction element 228.
- FIG. 4 right is again m the inner part 6 in the intermediate position Z dargestel lt, in Fig. 4 left
- Mechanismlastfal l in which the inner part 6 is in the second end position E2.
- the gripper of FIG. 1 which has been supplemented by a pin 370 at an upper end of the housing 4.
- the Dämpfu ngssystem 320 acts between the flange 352 of the gripper and the mast flange of the fuel assembly loading machine 5, which in the present case, the first connecting element 322 represents.
- the second connecting element 324 is arranged on the housing 4 of the gripper or connected thereto. In an intermediate position Z (FIG. 5, right) or in normal operation, the first connecting element 322 and the second connecting element 324 are indirectly connected, namely via the gripper flange 352.
- the connecting element 322 is formed as part of the fuel assembly loading machine 5 annular.
- the Verbindu ngselement 324 is presently designed as an annular plate and u mschl p understandt the housing 4 vol l constantly.
- the spring elements 334 by way of example two spring elements 334, are supported by a second end on a stop surface 354 of the second connecting element 324 facing away from the first connecting element 322. With a first end, the spring elements 334 are supported on a stop face 356 of the biasing element 342.
- the first connecting element 322 and the second connecting element 324 are detachably fixed via the gripper flange 352.
- FIG. 6 shows a further embodiment of a damping system 420, in which the damping system 420 is arranged within the housing 4.
- the first connecting element 422 is mounted in a recess 450, which is formed on an inner circumferential surface 26b of the housing 4, and held positively and non-positively.
- the second connecting element 424 is indirectly connected to the inner part 6 via a holding element 458 extending in the axial direction A.
- the holding member 458 is an elongated rod which is fixed to the inner part 6 with a first, lower end portion. At a second, upper end portion of the holding element 458, the second connecting element 424 is attached.
- the second connecting element 424 comprises a first load introduction element 428, which is designed as an annular, rotationally symmetrical about the holding element 458 arranged plate and is attached to the second, upper end portion of the holding element 458.
- the first load introduction element 428 is in normal operation and overload on a second load introduction element 430, which is also arranged rotationally symmetrical about the holding element 458 and has a T-shaped cross-section.
- the spring element 434 of the damping system 420 is a retaining element 458 concentrated. surrounding spring element, which is supported with a first end to the first connecting element 422 and with a second end to the second connecting element 424 and to the second load introduction element 430.
- the bias of the spring element 434 is achieved in the present case by a stop element 460.
- the stop element 460 is part of a screwed in the inner part 6 of the gripper sleeve 462, within which the holding member 458 is guided in the axial direction.
- the stop element 460 is arranged in an annular manner around the holding element 458.
- the second load introduction element 430 rests against the stop element 460 with an upper stop surface, the inner part 6 is in the intermediate position Z (FIG. 6, right).
- the inner part 6 of the gripper 2 pulls the first load introduction element 428 fastened to the holding element 458 downwards in the vertical direction, whereby the first load introduction element 428 presses on the second load introduction element 430 and also moves it downwards in the vertical direction against the spring force of the spring element 434 becomes.
- the spring element 434 is compressed and an overload is reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Automation & Control Theory (AREA)
- Vibration Prevention Devices (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016116392.9A DE102016116392B3 (de) | 2016-09-01 | 2016-09-01 | Greifer mit Dämpfungssystem zum Greifen eines Brennelementes |
| PCT/EP2017/071233 WO2018041693A1 (de) | 2016-09-01 | 2017-08-23 | Greifer mit dämpfungssystem zum greifen eines brennelementes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3507810A1 true EP3507810A1 (de) | 2019-07-10 |
Family
ID=59799346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17762061.4A Withdrawn EP3507810A1 (de) | 2016-09-01 | 2017-08-23 | Greifer mit dämpfungssystem zum greifen eines brennelementes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US10954107B2 (de) |
| EP (1) | EP3507810A1 (de) |
| JP (1) | JP6896845B2 (de) |
| DE (1) | DE102016116392B3 (de) |
| WO (1) | WO2018041693A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048219B (zh) * | 2019-12-27 | 2021-12-21 | 中国核动力研究设计院 | 一种可远距离实现快速连接和松脱的连接结构 |
| CN111958642B (zh) * | 2020-08-11 | 2022-02-01 | 大连理工江苏研究院有限公司金坛分公司 | 一种机械零件制造用智能机械臂 |
| CN116750630A (zh) * | 2023-06-16 | 2023-09-15 | 华能定边新能源发电有限公司 | 一种风力机的吊装装置 |
| KR102835085B1 (ko) * | 2024-11-19 | 2025-07-17 | 조병록 | 크레인용 권과장치 및 자동 제어 시스템 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2058186A (en) * | 1934-05-08 | 1936-10-20 | Nat Superior Co | Spring hook |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2576261A (en) * | 1948-11-08 | 1951-11-27 | Regan Forge & Eng Co | Hook |
| US2860908A (en) * | 1956-04-12 | 1958-11-18 | Walter R Peterson | Hydraulic material handling apparatus |
| GB1042557A (en) * | 1965-05-20 | 1966-09-14 | Joseph Edward Fawell | Hoist safety device |
| US4312124A (en) * | 1979-11-27 | 1982-01-26 | Westinghouse Electric Corp. | Multiple tube pulling apparatus |
| DE3120165A1 (de) * | 1980-06-05 | 1982-03-25 | Deutsche Post Rundfunk- und Fernsehtechnisches Zentralamt, DDR 1199 Berlin | Ueberlast- und schlaffseilsicherung |
| US4438910A (en) * | 1980-09-05 | 1984-03-27 | Hughes Tool Company | Shock absorbing snubber for derrick hooks |
| US4609219A (en) * | 1984-03-20 | 1986-09-02 | Yugen Kaisha Go Chuio Tekkosho | Suspension grapple |
| US5066059A (en) * | 1990-04-03 | 1991-11-19 | Baroid Technology, Inc. | Drill string compensator with improved transloaders |
| JPH10148698A (ja) * | 1996-11-18 | 1998-06-02 | Toshiba Corp | 高速炉 |
| JP2000019289A (ja) * | 1998-07-06 | 2000-01-21 | Hitachi Ltd | 原子炉の燃料取替機 |
| KR100817254B1 (ko) * | 2007-03-27 | 2008-03-27 | 한국뉴매틱(주) | 내장 진공펌프를 갖는 레벨 보정기 |
| DE102008024358A1 (de) * | 2008-05-20 | 2009-12-03 | Nkm Noell Special Cranes Gmbh | Vorrichtung zum Überlastungsschutz eines Kranes |
| JP2011225094A (ja) * | 2010-04-20 | 2011-11-10 | Japan Steel Works Ltd:The | 鉄道車両用緩衝器 |
| US8562047B2 (en) * | 2011-10-25 | 2013-10-22 | James R. Parker | Lifting hook for erecting steel joists |
-
2016
- 2016-09-01 DE DE102016116392.9A patent/DE102016116392B3/de not_active Expired - Fee Related
-
2017
- 2017-08-23 WO PCT/EP2017/071233 patent/WO2018041693A1/de not_active Ceased
- 2017-08-23 EP EP17762061.4A patent/EP3507810A1/de not_active Withdrawn
- 2017-08-23 JP JP2019512229A patent/JP6896845B2/ja active Active
- 2017-08-23 US US16/329,805 patent/US10954107B2/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2058186A (en) * | 1934-05-08 | 1936-10-20 | Nat Superior Co | Spring hook |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018041693A1 (de) | 2018-03-08 |
| US20190270619A1 (en) | 2019-09-05 |
| JP2019532279A (ja) | 2019-11-07 |
| DE102016116392B3 (de) | 2017-12-14 |
| JP6896845B2 (ja) | 2021-06-30 |
| US10954107B2 (en) | 2021-03-23 |
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