CN85105623A - Metal cutting apparatus - Google Patents

Abstract

Replacing in the process of the supravasal old split pin assembly of nuclear reactor, each Geju City split pin assembly is cut into the fragment that is easy to take away with the Metal Cutting processing unit (plant) with new split pin assembly.This device comprises collets (glass) and a Metal Cutting electrode that is installed with through hole vertically, and the water of pressurization just is injected into arc region by this through hole.A kind of getting-put instrument and a kind of folding tool are also disclosed simultaneously.This folding tool can be clamped to locking cap on the nut of the new split pin assembly of having finished changing.

Description

Metal cutting apparatus

The present invention is relevant with nuclear reactor, particularly relates to the problem of replacing the old split pin assembly in the reactor conduit with new split pin assembly.

A conduit generally includes epimere and hypomere, and hypomere is referred to as downcomer (LGT).The split pin assembly is installed on the lower flange of downcomer.Corresponding each split pin assembly all has two counter sinks up and down on the flange.Counter sink is stretched into down in split pin, and its shank puts in counter sink by the hole on the partition wall between two counter sinks.Screw thread has been attacked on the top of opening shank.To be positioned at nut on the partition wall upper surface is screwed in and attacks on the threaded opening shank, just can fix split pin, during nut on tightening the opening shank, split pin is just drawn in down in the counter sink, and the lower surface of the partition wall between its flange and two counter sinks contacts.Because a variety of causes is necessary that replacing is fixed on supravasal split pin assembly in the past.Claim that in this manual the split pin assembly that needs to change is old split pin assembly.In old split pin assembly, there is a register pin to pass nut and is welded on the nut.The split pin assembly puts in the vertical trench on the catheter wall, and this part of catheter wall extends upward, and forms a border in the horizontal and seal groove, thereby has also limited the passage that leads to the split pin assembly.

When replacing old split pin assembly, need old assembly is taken away with new split pin assembly.And the radioactivity of conduit and old assembly is all very high, must be placed in the pond to handle.Conduit is a heaviness and complicated body of stainless steel, and its manufacturing is very time-consuming and take a lot of work, so very expensive.Generally be about 80,000 dollars.Therefore require when taking old split pin assembly away, can not damage conduit.One of purpose of the present invention will be taken old split pin assembly away exactly in this case.

Can not come separately with the way of oppositely twisting rifle nut, because nut and register pin weld together the bolt and nut of clip of a split pin assembly.Someone proposes to discharge old split pin assembly with remote-controlled automatic electric saw, and it is worthless that this method has proved.Because this operation is very complicated, be difficult to not damage conduit, especially the more difficult this point of accomplishing in the close limited zone of conduit groove.Therefore, one of purpose of the present invention just provides certain equipment and method, and it can and discharge old split pin assembly effectively and not damage conduit in fairly simple mode.

Old split pin assembly is cut into two main fragments by the metal separation cutting implement, a fragment (this paper is called the nut fragment) is made up of residual old nut and the old split pin part institute that is screwed on the nut, and another fragment then is made up of the nubbin of split pin.The latter is taken out from the following counter sink of flange by pin puller and the spiral extruder on clamping and the shifting tool, and is deposited in the reject chute.At this moment just must from the last counter sink of flange, discharge the nut fragment, and new split pin assembly is fixed on this flange.Carrying out this section when more changing jobs, main difficulty is: on the new nut only some zone can carry out mechanically actuated.Nut is from last counter sink puts in groove on the downcomer wall, and this groove shape is the same with " rat hole ", therefore also calls it like this.Have only a limited zone can be used for discharging the spiral shell fragment in " rat hole " outside, and be screwed on the new pin with a last counter sink of new nut embedding and it.In addition, the furcation of pin (or claiming blade) must be aimed at the catheter tip flange.The present invention can finish whole more changing jobs, and promptly discharges the old nut fragment and also new split pin assembly is fixed on the flange.

The invention provides a kind of method and apparatus,, subsequently counter sink is up and down cleaned up, and a new split pin assembly is fixed on the flange and do not damage downcomer in order to from the last counter sink of flange, to take the nut fragment away.

Inserting this work of new pin comprises and the pin furcation is correctly aimed at the conduit flange and with suitable moment of torsion nut is screwed on the pin.

More changing jobs is divided into two stages and carries out, and the phase one is to take the nut fragment from last counter sink away, and changes a new nut.For accomplishing this point, to instrument and to operate desired condition as follows:

1. under other frock tool is assisted in the mechanical arm workstation, and can operate in the desired finite space scope of these frock tools.

2. in " rat hole " outside available finite space, can operate.

3. the workbench above the pond can provide new nut at an easy rate.

4. require instrument when being connected with programmable computer and entering automatic control state, can operate.

5. instrument must use in the boracic sour water.

Subordinate phase is by a new nut is tightened in above the new split pin with suitable moment of torsion a new split pin assembly to be fixed on the flange.The use of instrument and practical operation must be satisfied following condition in this stage:

1. will make split pin in downcomer can adjust the orientation makes it easy to aim at the top flange of downcomer.

2. in " rat hole " outside limited space, can operate.

3. under the assistance of other instrument of mechanical arm workstation, and can operate in the desired finite space scope of these frock tools.

4. can provide new split pin at an easy rate on the workbench above the pond.

5. when the operation that requires instrument can adapt to the robotization under the computer control requires, and carry out practical operation.

6. must in the boracic sour water, operate.Can revolve nut and add suitable moment of torsion.

In order to take the nut fragment away and new split pin assembly is installed and is not damaged downcomer on the lower flange of the downcomer of reactor, frock tool provided by the invention will satisfy above-mentioned condition.

A conduit is being changed when operation, downcomer will partly separate with the conduit epimere, and delivers to the mechanical arm workstation, there its pending processing such as be accurately positioned.Next step is old split pin assembly by the metal separation cutting machine from cutting into fragment the counter sink up and down, take fragment away, the cleaning counter sink, new nut is put in the counter sink, insert new split pin by following counter sink, new nut is screwed on the new pin on the pedestal that is fixed on counter sink.At this moment, need new nut and new split pin are fixed together, make between them and can not rotate relatively, in old split pin assembly, achieving the above object is by wearing a register pin at nut with near the pin upper end, and the method realization that it and old nut are welded together.Old and new nut are all by the AISI(304 type) stainless steel or similarly alloy make.This alloy is difficult to weld under water.When changing, we connect the welding register pin that replaces old split pin assembly with flanging and connect.For this reason, process the new nut that some upper ends are fixed with a locking cap, reprocess the bar that some have the top lengthening, the new split pin of groove (a kind of special groove) is arranged on the bar.When new nut is screwed in the new split pin, and after being fixed in the counter sink, the groove that locking cap faces split pin is stretched out on the top of new nut.Must behind the convolution imbed locking cap in the groove of split pin securely.Produce relative rotation between new nut and the pin preventing.Providing a bordering tool to finish this task, also is one of purpose of the present invention.

When creating a kind of bordering tool, run into some serious problems, the mechanical arm workstation also includes six parts except bordering tool, and in this finite space that just requires to provide at other instrument, bordering tool can effectively be operated.Also require bordering tool under remote control, to operate, both can carry out manual operation length by length, also can under computer program commands, automatically carry out from mechanical hand control centre distance.

New split pin assembly only can touch it after putting into the lower flange of downcomer in the space of about 180 ° garden post solid angle, can not touch it from the top.When old and new split pin assembly was contained in the lower flange of downcomer, this assembly protruded in " rat hole " of the said downcomer in front, and the downcomer wall is across on it, and the edge of downcomer wall has then formed the border of " rat hole ".

The present invention has overcome above-mentioned these obstacles and unfavorable factor and a kind of bordering tool is provided, although it is very limited to touch the space of locking cap, still can effectively the locking cap convolution that is fixed on the new split pin nut be entered in the groove or groove of new split pin with this instrument.The invention provides a kind of like this instrument, it can be operated in the spatial dimension that other instrument provided of mechanical arm workstation effectively.The present invention has provided a kind of convolution method, unique be suitable in the finite space that can touch locking cap and space that the mechanical arm workstation limits in, with the locking cap convolution and imbed in the new split pin.

Briefly say, the present invention includes a device of applying mechanically split pin assembly old on the new split pin unit replacement nuclear reactor conduit; Above-mentioned old split pin assembly comprises Geju City split pin and an old nut, and old nut is fixed to this split pin on the above-mentioned conduit flange; Above-mentioned old nut is screwed in this old split pin, and the bottom covering department of this old nut is not screwed in this old split pin, but has put in this flange; This old split pin and this conduit are active; Above-mentioned device comprises a metal that has electrode and cuts off processing machine.The device that above-mentioned instrument makes it match with the old nut of the old split pin assembly that will change on the conduit is installed under water.The operation of can switching between the electrode of adorning on this processing machine and this old nut; This device also comprises the device that is used for linking to each other with this processing machine and lights separation cuts electric arc between this electrode and this old nut; This processing machine should be installed to such an extent that this electrode is on some angles, thereby can process a hole with electric arc on said bolt and nut of clip; This old nut that pierced the upper surface outside of conduit arrives the entrance side of electric arc, and the whole zone that penetrates is stretched over the bottom of nut end tapping always, but does not penetrate nut like this, and this split pin assembly is fractured into the fragment that is easy to take away, and does not damage conduit; One of fragment mainly comprises the part of old nut and the part that old split pin is screwed into nut, and another fragment mainly comprises the remainder of old split pin.

In a most preferred embodiment of this paper narration, the old split pin assembly that each is selected, all fragment that is become to be easy to remove by mechanical arm metal separation cutting processing crusher machine.Processing machine and split pin assembly are all below the boronic acid containing pond.Electrode is axially sent (feeding mode) to workpiece with the constant fixed speed of giving.When workpiece is sent to, generally also carry out axial vibration (vibration mode) at electrode with the about 60 times frequency of per second.When electrode moves to when workpiece is enough near (vibration mode), current potential has surpassed the dielectric strength of water, between electrode tip and workpiece, just light and pass through electric arc, this electric arc will separate little metallics from workpiece, when electrode (vibration mode) when workpiece is removed, electric arc just extinguishes.Metallics is cooled, and is not held the current notes that pump not hold from electrode with the gas that generates by electrode and wash away, and the suction system that can be aspirated the water of huge amount simultaneously siphons away.During through this zone, the water flow velocity that washes away is very high, has taken away fragment and the new gas that produces.

Electric arc gets out a hole with assembly, and two conditions must be satisfied in this hole: at first, it must be divided into fragment with assembly, and a main fragment comprises residual nut and the part pin that is screwed on the nut.Another fragment is made up of the nubbin of pin.Secondly, this hole should not comprise any part of downcomer or flange.

In order to satisfy these conditions, must accomplish this point, just promptly the internal thread of nut certain position on the nut feather edge begins to occur, when being screwed in it in the split pin, the bottom covering department of nut is not screwed on the pin like this.Count from the nut feather edge, generally the height of cover is about 0.40 inch at the bottom of this nut.

The split pin assembly is divided into fragment and does not damage flange, be to accomplish that feeding of this point electrode needs along the certain angle of certain approach, this angle by following 2 limit: one is the electric arc incidence point, the place of a long enough distance is mapped on the nut electric arc above the flange leaving, to avoid damaging flange; Terminal point is the bottom in nut and pin thread attachment areas, but still is on the interior position of nut bottom covering department scope.

When electrode moves when reaching home along this approach, electric arc cuts off the whole transversal section of split pin, and assembly just is divided into two fragments, and one comprises residual nut and attacks threaded pin part, and another is the remainder of pin.Because the wall of bottom covering department does not penetrate, flange is injury-free.The incidence point of general electric arc exceeds flange 0.8 inch approximately.The supply voltage of arc cutting is generally between the 19-21 volt, and when the electrode shift-in with when shifting out old split pin assembly, source current is pacified between the 250-300 peace at 25-30 and changed.The location of electrode is to be realized by the electrode guide block that a nonmetallic electrically non-conductive material (normally using the high glass of softening temperature) is made.Guide block is hollow, and the inside surface of cavity is processed into certain shape.Like this, guide block just can accurately be contained on the side of nut, and becomes level with the flange surface of close split pin assembly.Guide block has post hole, a garden, and it communicates with inner chamber.Electrode can slide in this hole by above-mentioned determined angle, so that the electric arc of incident is in and leaves above the downcomer flange suitably distance between electrode and the split pin assembly, then on the position of sd so, promptly electric arc does not penetrate the complete section of pin on the position of bottom covering department the electric arc of terminal point.Electrode has a flange, and it contacts with shaft shoulder portion in the hole of guide block on a certain position, and the motion of electrode in the guide block hole of punching in the split pin just stopped before penetrating bottom covering department.Many holes are arranged on the guide block; Water is sucked into next by these holes and fragment and air scour is gone out arc region.

What now will narrate is the container of a new nut, and a guide groove that loads new pin is got one for one and put instrument, and an instrument that inserts pin and tighten.All instruments all are fixed on the load pillar, and this pillar then is securing against pool wall, and this just makes that conduit remains under water always during handling the split pin assembly.Fetching tool is fixed on the upright position of load pillar, and it just can carry out horizontal location so that operate in conduit and nut container like this.Downcomer can be forward and Rotate 180 ° backward, and this just makes removing, clearing up of cutting, fragment and changes operations such as nut and can carry out in phase mutually in only finite space.Cutting apart and washing away is that carry out 0 ° of position at downcomer.Removing the nut fragment and changing nut is to carry out 180 ° of positions, and sequence of operation is as follows:

0 ° of split pin assembly and removing pin fragment that position-cutting is old.

180 ° of positions-remove and remove nut fragment.

0 ° of position-cleaning counter sink.

The new nut in 180 ° of positions-insert.

180 ° of positions-insert new pin are screwed to nut on the pin with certain moment of torsion.

Container includes a flat board, and the groove of a bending is arranged at its top, generally is the garden arc, extends about 270 °.Groove provides a material storehouse for new nut, and it also has a near load port (end), and a near baffle plate (the other end).Baffle plate is fixed the position of nut, gets in order to fetching tool.A beidirectional waterpower rotary fluid power device (ROTAC) is arranged in the container, and it can make an arm that can reach groove rotate.A funnel is arranged on load port, and it also is used as the interim support of a long tube that stretches out from above water platform.A new nut enters in this long tube, just is sent to load port.Nut one is in load port, rotary fluid power device just starts, begin swing from the location base of the nut back put into, so push nut to baffle plate along groove, swing arm is just put go back to the position in its base subsequently, repeats this program and is filled (26 nuts) up to the nut storing box

The height of container should make to be got one and puts the nut that instrument removes from non-load port and be on the suitable horizontal level, so that put into the last counter sink of downcomer.

Get one and put instrument and comprise a clamper and a plurality of hydraulic actuator,, that is vertically and on optional horizontal direction move so that clamper is done three-dimensional motion.Its function is exactly to remove and remove old nut fragment, takes off new nut and it is put into the counter sink from storing box.

After the Rotate 180 °, fetching tool is finished following operation to downcomer when taking the old nut fragment away from the position of old split pin assembly cutting:

1. from moving to by giving on each seated position that plate washer stopped of putting towards conduit inwardly on the position of its base (storage).

2. generally rotate about 90 °, with the claw of clamper be positioned at old nut near, work the scalable link stopper that holds out against the blue effect of tremie method with one and guarantee that claw and nut accurately locate.

3. clamping old nut fragment.

4. lift fragment from last counter sink.

5. go back on the lead position, usually in half-twist (revesal in second step).

6. be moved back on the position in base (revesal of the first step), This move is braked by adjustable baffle plate equally, and this baffle plate sets in advance the top that the nut fragment directly is positioned at the waste material chute, and chute is sent the nut fragment to the waste material basket.Baffle plate is equally also to the clamper location, so that sandwich a new nut fragment again in the non-load port of container.

7. put down nut (revesal in the 4th step).

8. unclamp the nut (revesal in the 3rd step) of clamping.Like this, just the nut fragment can be put into chute.

Before the operation of putting into new nut carrying out subsequently, counter sink is cleaned out about inciting somebody to action with wiper, and starts rotary fluid power device, a new nut is shifted onto nut shift out on the mouth.

After the downcomer Rotate 180 ° is cleared up, put a new nut into counter sink and need finish following operation steps:

1. be positioned under the situation of position in base at clamper, rotate this clamper, make it aim at the nut container, the claw of clamper can be preset baffle plate with respect to the scalable of the correct location of the nut fragment in the conduit.Equally also these claws correctly can be located with respect to the new nut in the container.

2. press from both sides the nut that makes new advances.

3. lift new nut from container.

4. screw to the position (revesal of the first step) in base.

5. shift to downcomer (first step of removal nut).

6. half-twist navigates to new nut top (second step of removal nut) of counter sink on the downcomer.

7. nut is moved down and puts into (revesal in the 3rd step) in the counter sink.

8. unclamp the nut (revesal in second step) of clamping.

9. turn round 90 ° (revesals in the 6th step).

10. turn back to the position (revesal in the 5th step) in base.

The advantage of fetching tool is as follows:

1. change this instrument of running program and just can finish two kinds of necessary operations.

2. when linking to each other with a programmable computer, this instrument can be operated automatically.

3. when operating with manual mode, instrument can be used manual manipulation, and this moment, instrument can be proofreaied and correct the undesirable misoperation that produces in operating process.

4. this instrument is calibrated before can be in being placed to the pond.

5. when instrument was immersed in the boronic acid containing pond of reactor, instrument can remote operation.

6. this instrument is made by stainless steel, and it can resist the etch of boracic sour water.

In case new nut is located in last counter sink, that just can use " pin inserts/tightens " instrument to finish the work of new and old split pin replacement of component.This part instrument has a blade that is used for accepting and align new split pin and one to be used for new nut is screwed to spanner on the pin.This instrument also has a hydraulic actuator, is used for it is moved to the position that screws this operation of nut from location base or stored position.Be carved with teeth groove on the outside surface part length of new nut, general nut has 10 equally distributed teeth groove, also is that each teeth groove is 36 °, and spanner generally has 5 teeth groove.When this instrument is on the position in base, by the location funnel a new pin is placed on the blade, blade just in time injects in the furcation of pin.In order to accomplish this point, pin is screwed into the end of long tube on the deck, pond, pipe is injected the pond, the method for imbedding in the blade with the split pin furcation is connected together it and blade kiss, oppositely turn pipe subsequently, it is separated with split pin and remove.So new nut is in place in last counter sink, and on being shelved at the bottom of the cyclic group of counter sink." pin inserts/tightens " instrument is just carried out following operation now:

1. blade and both can fix on the split pin furcation with orientation that it is embedded in split pin together mutually and aim at 0 ° position, also can fix on the split pin furcation and aim at 90 ° position, and this to be that live end decides by that end of the hydraulic actuator of controlling blade.This might insert rectangular two split pins mutually with regard to making in the downcomer that will handle.

2. this " pin inserts/tightens " instrument is shifted to downcomer from deposit position along one group of guide rail with it by a hydraulic actuator.A baffle plate that presets locates instrument, make split pin accurately be positioned at hole on the downcomer flange below, flange is coaxial with hole and counter sink, spanner then is positioned at nut top.

3. start another hydraulic actuator, blade (split pin and it are together) is gone up hole and the above-mentioned nut lifted by downcomer, rise on the lever arm that the height that nut is contacted with pin thread is positioned at portion on hand always a baffle plate is arranged, when contacting with nut thread, do not allow nut in counter sink, be ejected with convenient pin thread.

4. start another hydraulic actuator, spanner is dropped on the nut, the interlock of teeth groove can take place and can also not take place in this step.

5. restart another hydraulic actuator to rotate spanner.It is 36 ° (circles 1/10th) that baffle plate that presets defines this rotation amount.If teeth groove does not have the interlock so will interlock after this operation in step before this.

6. spanner is mentioned (revesal in the 4th step) from nut.

7. 36 ° of spanner counter-rotatings (revesal in the 5th step).

8. periodically repeated for four, five, six and seven steps.Because nut is fixed by gripping arm, so along with nut is screwed on the pin, just pin is upwards drawn, makes the flange of pin enter and be fixed in the following counter sink of downcomer flange.After pin was fixed, owing to give the effect of putting extreme pressure, spanner just stopped operating.Because acting on the pressure that pin inserts on the hydraulic actuator is constant in cycle period,, and make pin that correct orientation be arranged so the opening bifurcated of pin is embedded in the blade that loads pipe always.

9. after spanner stopped operating for the first time, the pressure on the torque hydraulic gearing just was increased to predetermined maximum value always, and this higher pressure is through accurately control.Under this higher pressure, nut is locked in the substrate of counter sink, controls the size of this elevated pressures, can obtain suitable locked-in torque, and this will make nut or split pin not sustain damage.

10. after nut was fully tightened, spanner rose and rotates back into its reference position (the 6th, seven steps).

11. blade puts down (revesal in the 3rd step).

12. " pin inserts/tightens " instrument turns back to deposit position (revesal in second step).When instrument shifts near deposit position, be used for will connecing spanner and lever arm that nut is fixed in the counter sink with some baffle plate kissings, these baffle plates just with they top turn-ofves from blade, in order to load next pin, must be done like this.When instrument when downcomer is retracted, spanner and arm are subjected to stopping of spring, are sent back to original position with that.

According to view of the present invention, this " pin inserts/tightens " instrument has following advantage:

1. by changing sequence of operation, also be about to sequence of operation conversely, this instrument promptly can be used to fastening nut, also can be used to unload lower nut.

2. native system can manual operation, and also can operate automatically when linking to each other with programmable computer.

3. when working with manual mode, this instrument can be corrected in the misoperation that produces in the operating process.

4. instrument can insert the pond subsequently in the place calibration that will use.

5. operate in the limited area that instrument can be provided by " rat hole " in downcomer one side.

6. because nut and spanner all have teeth groove, mesh regional is had only under 180 ° the situation, both still can mesh finely, and obtain needed high torque value.

7. when the deck of instrument from the pond immersed the boracic sour water, instrument can carry out remotely-controlled operation.

8. instrument is made by stainless steel, can be by the etch of boracic sour water institute.

This paper has similarly also narrated a bordering tool of being made up of an edge-folding mechanism and support thereof.When this instrument was locked in the position of an indentation admittedly, this support just was in standby condition; Support just forwards on the working position when instrument gets loose then, and edge-folding mechanism just is positioned, and can carry out the flanging operation to a new split pin assembly.

One of the similar of this edge-folding mechanism " ice tongs ", it has the jaw that an energy rotates on pivot pin.The flanging pin that a taper is all arranged near each jaw end the inside.Jaw is installed on the pivot pin, and its flanging pin is face-to-face layout, and jaw can be in retracted position and flanging pin at the flanging pin and be in the flanging position and change between the two.There is a cam face inside of each jaw.Jaw all is contained near on the pivot pin at support one end place.In jaw inside, edge-folding mechanism has " C " shape framework on the support, and it and hydraulic gear link, and the latter can move " C " shape framework forward along support backward.Framework has a cam following roller, and it contacts with cam on the jaw.When hydraulic gear moves " C " shape framework, just drive jaw and between retracted position and flanging position, change.

In general, support is a semi-girder, and it is locked on the upright position, is driven by a hydraulic actuator, and installs to such an extent that can rotate around level and Z-axis.When support unclamped, in the partial journey of hydraulic actuator piston, it vertically rotated to outside the baffle plate around transverse axis, and in all the other strokes of piston, it flatly rotates around Z-axis, and edge-folding mechanism is placed on the flanging position subsequently.So, handle " C " shape framework by hydraulic gear locking cap bent in new split pin.

Carry out following each step successively and just can finish the flanging operation:

1. the support release of edge-folding mechanism.

2. support is from its indentation or the stored position operating position of transferring to it.

3. handle " C " shape framework and move forward, then this locking cap is bent in the groove of into split pin the close locking cap of the jaw of edge-folding mechanism.

4. handle " C " shape framework and oppositely move, promptly shrink and go back, open jaw.

5. the support of edge-folding mechanism rotates back into its vertical retracted position.

6. support is locked on the retracted position.

Bordering tool described herein has an advantage at least, and promptly it can remote manual control also can automatically carry out straighforward operation by the order of programmable computer.When it was worked with manual mode, bordering tool can be corrected the misoperation that produces in the use.This bordering tool also can be calibrated before the operation so that carry out at the scene in that they are installed to the mechanical arm workstation.

By reading some preferred example explanations of this paper and understanding the accompanying drawing of listing below, just can more detailed understanding be arranged to the present invention:

Fig. 1 shows the synoptic diagram of apparatus of the present invention, and the present invention can be partitioned into several parts that are easy to take away to Geju City split pin assembly;

Fig. 2 is a shaft side figure of having simplified, and for clarity sake, omits to some extent; Fig. 2 shows metal cutting apparatus (being the present invention);

Fig. 3 is the side view of device, includes metal cutting apparatus shown in Figure 2 interior;

Fig. 3 A is the sectional view along the II A-II A line of Fig. 3;

Fig. 4 is the longitudinal sectional drawing of electrode assemblie in the metal separation cutter sweep shown in Fig. 2 and 3;

Fig. 5 is the longitudinal profile partial view through amplifying, and is used for the electrode of electrode assemblie shown in the presentation graphs 4.

Fig. 6 is an electrode tip view of taking from direction VI among Fig. 5;

Fig. 7 is a side view of hydraulic chucks, and this jig is the electrode that is used for fixing metal cutting apparatus of the present invention.

Fig. 8 is a sectional view of taking from Fig. 7 VIII-VIII line;

Fig. 9 is the orienting lug planimetric map of IX direction in Figure 10 in the processing unit (plant) of the present invention;

Figure 10 is the sectional view along Fig. 9 X-X line;

Figure 10 A is the end-view of Figure 10 X A direction;

Figure 10 B is the cut-open view along Figure 10 A X B-X B line;

Figure 11 is the planimetric map of Figure 10 XI direction;

Figure 12 is the end-view of Figure 10 XII direction;

Figure 12 A is the side direction partial view of Figure 12 XII direction;

Figure 13 is the side view of orienting lug and the pipe that connects mutually with it;

Figure 13 A is the side view of the X III A direction of Figure 13;

Figure 14 A, B, C, D, be the synoptic diagram that metal separation cutter sweep of the present invention progressively is close with the flange of old split pin assembly and installation component;

Figure 15 and 16 has omitted the planimetric map of electrode assemblie and the side view of Figure 15 X VI direction, shows the slide block of processing unit (plant) of the present invention, the relation between old split pin assembly and the flange before they are about to engagement;

Figure 17 and 18 is side views of X VII direction among a planimetric map and Figure 17, and is similar with 16 to Figure 15 respectively, but shows the bridle joint situation of guide block and old split pin assembly and flange;

Figure 19 is a diagrammatic cross-section, and the electrode that shows processing unit (plant) of the present invention penetrates the mode of old split pin assembly;

Figure 20 is a pictures, the relation of electrode and split pin assembly when showing practical application of the present invention;

Figure 21 and 22 is two photos, shows the situation that nut is separated respectively from two mutual roughly rectangular directions from pin.

Figure 23 is the local shaft side figure of downcomer.The split pin assembly of downcomer will utilize the present invention to replace.

Figure 23 A is the sectional view along the I A-I A line of Figure 23;

Figure 24 is the side view of a new split pin;

Figure 25 is the planimetric map of a new nut;

Figure 26 is the longitudinal sectional drawing along Figure 25 XX VII-XX VII line;

Figure 27 is a longitudinal sectional drawing that has been contained in the new split pin assembly in the downcomer;

Figure 28 is the simplification shaft side figure of the fetching tool that uses among the present invention, for the sake of clarity, has omitted a part of part;

Figure 29 is the planimetric map of fetching tool;

Figure 30 is the side view on Figure 29 XX XI direction, amplifies slightly, and the part is a sectional view;

Figure 31 is the end-view of Figure 29 IX direction, and the part is a sectional view;

Figure 32 is the planimetric map of curved arm lever, and this lever is used for rotating the fetching tool clamp device;

Figure 33 is expression fetching tool, downcomer and the nut container planimetric map of relation each other;

Figure 34 mainly is the planimetric map of nut container, but also shows the relative position of this case and pin insertion/tightening tool;

Figure 35 is along the partial cross-sectional view of XII-XII line among Figure 34;

Figure 36 is the side view of Figure 24 X IV direction;

Figure 37 is the simplification shaft side figure of the pin insertion/tightening tool that uses of the present invention, for clarity sake, and some omission;

Figure 38 is the locational planimetric map that pin insertion/tightening tool is in storage or base.On the location base pin is being placed on the blade, and on this position, nut is being screwed on the pin;

Figure 39 is the planimetric map of pin insertion/tightening tool;

Figure 40 is the side view of Figure 39 X VIII direction;

Figure 41 is the longitudinal sectional drawing of Figure 40 along X IX-X IX line;

Figure 42 is the longitudinal sectional drawing of Figure 41 along XX-XX line;

Figure 43 is the longitudinal sectional drawing of Figure 41 along X XI-X XI line;

Figure 44 is the sectional view of Figure 41 along X XII-X XII line;

Figure 45 is the transverse cross-sectional view of Figure 40 along XX III-XX III line;

Figure 46 is the transverse cross-sectional view of Figure 45 along XX IV-XX IV line;

Figure 47 is how a new split pin is sent to the synoptic diagram on the pin insertion/tightening tool;

Figure 48 is in practical application of the present invention, a planimetric map that is carrying out the split pin assembly of backfin operation;

Figure 49 is along the sectional view of II-II line among Figure 48;

Figure 50 is a shaft side figure of having simplified, and is shown schematically in the bordering tool consistent with the present invention, and for the sake of clarity, figure has omission;

Figure 51 is the front view of bordering tool, and solid line represents that hemmer is in operating position, and dotted line represents to be in retracted position;

Figure 51 A is the partial plan layout of piston rod expansion, and this piston rod is located to edge-folding mechanism, there is shown the working method of edge-folding mechanism;

Figure 52 is the V direction side view of Figure 51, and hemmer is in operating position, and part is a sectional view;

Figure 53 is the partial plan layout of edge-folding mechanism adjustment structure;

Figure 54 is the partial side view of hemmer, and part is a section, shows the part of the hemmer of carrying out the backfin operation;

Figure 55 is the partial lateral sectional view of Figure 54 along VIII-VIII line;

Figure 56 is a front view, and the part is a section, shows the bottom of the hemmer support that is on the retracted position especially;

Figure 57 is the partial side view of Figure 56 X direction, and part is a section, shows cam advances situation from the backfin head of hemmer to horizontal direction;

Figure 58 is the partial lateral sectional view of Figure 56 along XI-XI line;

Figure 59 is the partial lateral sectional view of Figure 56 along XII-XII line;

Figure 60 is the partial end view of Figure 52 X III direction, shows the mechanism that produces the backfin action;

Figure 61 is the partial lateral sectional view of Figure 60 along X IV-X IV line;

Figure 62 is the part sectioned view of Figure 51 along X V-X V line;

Figure 63 is the planimetric map of backfin jaw on the folding tool; And Figure 64 is the side view on Figure 63 X VII direction, and the part is a section, shows the casing part of folding tool.

Device provided by the invention is to be used for that (Fig. 1 14-20) cuts and separates the fragment of taking away easily Geju City split pin assembly (100).Shown in the more detailed data of Calfo, a split pin (127a) is arranged in the assembly (100), it is fixed on by a nut (145) in the counter sink (147) and (149) on the flange (125) of downcomer (113).Register pin (151) passes the top of nut (145) and is welded on pin and the nut lock nut together, so this assembly can not be with respectively nut and pin being dismantled with the method for oppositely unscrewing nut (145).In practical application of the present invention, assembly (100) is to cut into two fragments (153) and (155) (Figure 21,22) by the metal separation arc cutting, (153) piece wherein is mainly by nut (145) and form with the part of its pin that is screwed in (127a).Another piece (155) mainly is made up of the remainder of pin.(153) fragment can be removed from last counter sink (147), and fragment (155) can be from removing the counter sink (149) down.This cutting is can realize fully, because have one not have the end of tapping to cover (156) (Figure 19) in the bottom of nut (145).Figure 20-22 shows the processing procedure of changing old split pin assembly with a new split pin assembly (102), but is enough to illustrate how practical application of the present invention.

Device provided by the invention comprises a Metal Cutting separating and processing apparatus (MDM) (213) (Fig. 1), the power supply of a processing unit (plant) (213) and control module (214), a programmable computer (2-16), a suction filtration system (218) and a hydraulic system (220).(MDM) and the suction filtration system be that box indicating is used in the ， Geng Change pond that is immersed in the Ran Liao Geng Change pond (222) of reactor in the drawings separately.Power supply and control module (214) itself Yaoed the scene power supply of the old split pin assembly of Geng Change by a multiple power source (224) (generally being exactly a source power supply).Power supply and control module (214) computing machine (216), multiple power source (224) and hydraulic system all are contained in the mechanical arm control center above the pond (222), and the staff who participates in Geng Change here will can not be subjected to radioactive harm.Between each parts the transmission line of circuit and liquid stream marks at Fig. 1, and this paper is repeated description no longer just.

A working head (225) (Fig. 1,2,3) is arranged MDM(213), a main shaft (227) is housed in the working head, one is used for sealing to prevent that the cabinet (229) that water infiltrates also is contained on the working head (225).A motor (not shown) is arranged in the cabinet, come drive shaft (227) by a rack and pinion (not shown).Main shaft (227) can rotate with respect to working head and the parts that are connected with working head.

Working head (225) and main shaft (227) be contained in carriage (231) (Fig. 2) on.Carriage (231) is driven by the hydraulic cylinder (237) that is contained on the flat board (239), and moves at guide rail (235) with going up approximate horizontal.When cutting during a split pin assembly, dull and stereotyped (239) with and top part in addition all be in pond (222) below.Dull and stereotyped (239) are driven by motor (243) by chain (245), can vertically move to mechanical arm control center along guide rail (241), thereby with regard to Ke Yi Geng Change electrode (247).

Main shaft (227) is an elongated rod member, above it adjunction a dop (251) (Fig. 3,7).Long head (251) is called the main shaft dop in this paper.Main shaft dop (251) clamping a garden cylindrical rod (253), at an end of bar (253) screw rod (255) is arranged.Screw rod (255) be Twist on sleeve (257), the other end of this sleeve be electrode dop (261) chuck (259) (Fig. 8).(26b) Twist is tightly on the screw rod (255) outside sleeve (257) for gland nut.Gland nut (26b) is pressed in the terminal (265) of feed cable (267) on the sleeve (257) tightly.Make main shaft produce vibration with one with electromagnet (not shown) of the similar circuit (not shown) control of common door circuit.Use the knurled nut (269) of Yi Twist on bar (253) to control the amplitude and the frequency of vibration.

With carriage (271) limit switch 1LS is linked to each other with working head (225) with 2LS (Fig. 3,3A).The purposes of switch 1LS and 2LS is described in Calfo.Carriage (271) is equally also supporting another limit switch L4SW16, and its effect is, after pin (127) was cut off, arc cutting had been refracted to but when not penetrating nut (145), main shaft (227) and electrode (247) has no longer inwardly been moved.Switch 1LS, 2LS and L4SW16 are respectively by executive component 273,275, and 277 promote.Mechanism (277) may surmount limit switch 1LS and 2LS.

Except chuck or jaw (259), electrode dop 261(Fig. 8) also has container or a cylinder body (279) and a piston (281) one by one.Chuck (259), cylinder body (279) and piston (281) are coaxial.Chuck cylindrical shell (283) has a radially outer projection, it with piston rod (285) on the interlock mutually of the interior shaft shoulder, set nut is (on the chuck cylindrical shell (283) of 287) Shi Twist in sleeve (257).(289) Shi Twist are in the outer end of cylinder body (279) for ring cover.The limb (291) of chuck (259) is processed into taper near the place, top.Below the limb top and along the conical surface, in the opening of these limbs from cylinder body (279) by and with very little distance of its maintenance.Perforated wall (293) has the tapering same substantially with limb.Between cylinder (279) and piston (281), spaced-apart toroidal cavity (295) and (297) are arranged.Provide liquid to cavity (295) and (297) respectively by flexible pipe (299) and (301).The liquid that enters cavity (295) by flexible pipe (299) just makes cylinder body (279) move inward.The conical surface of cylinder body (293) plays action of cam, makes limb (291) enter clamped position.Sending liquid to for cavity (297) by flexible pipe (301) just makes the cylinder block withdrawal, makes limb (291) return to non-clamping position.

Chuck (259) is being fixed electrode assemblie, and electrode assemblie (Fig. 4,5,6) comprises the garden cylindrical electrode clamper (303) of a hollow.This clamper has one to attack externally threaded termination (305) and the flange (307) in the middle of both ends of the surface.Electrode (247) has one to attack female sleeve, and some is hollow to this sleeve vertically.The terminal through hole (309) that has from the hollow part of electrode (247) radially.Tao Tong Twist is on termination (305), and the thread connection place is fixed by epoxy resin.The passage (311) that main shaft (227) has a hollow vertically (Fig. 7), main shaft dop (251) and electrode dop (261) also are hollow.Pressure (hydraulic) water is by flexible pipe (313) injection channel (311), do not penetrate and hold by through hole (309) from electrode.Pressure generally is about 50 pounds of every square of inch, does not hold the water per minute about 1/2 of outflow to add human relations from electrode.

A nonmetallic electrical isolation piece (315) (Fig. 3,9-13) be supported on working head (225) a carriage (317) (Fig. 3) on, collets (315) have a dimple, in dimple, be processed with the wall of vertical and level, facing to the nut (145) of old split pin assembly (100), also abut against near the surface of downcomer flange (125) simultaneously.Limit switch L4SW15, L4SW14A, have only 3L4SW14B on the L4SW14B(figure) all be contained in the lower end (Fig. 3) of collets, the action of L4SW15 indicates that collets (315) are correctly to be fixed on flange (125) surface that extends out outside last counter sink, nut (145) is then stretched out by this counter sink.Switch L4SW14B and or the action of 14A indicate that collets (315) correctly are fixed on the sidewall of flange (125).Be close on the surface (319) of collets (315) of nut (145) two convex ridges (323) (Figure 10,12) are arranged.Post hole, a garden (325) is arranged on the collets (315), and it leads on the surface of the nut (145) that collets tightly face toward.The top in hole (325) enlarges extension, forms a shoulder protruding (327).The size of the some of flange (307) lower end clamper (303) and electrode (247) is suitable, installing to such an extent that can make them to slide in hole (325) with hole (325) when coaxial substantially when these parts, electrode angle of living in should make electrode (247) stretch in the distance last (Figure 19) that exceeds (125) C of flange.It is enough big that this distance is wanted, in order to avoid the damage flange.The angle in hole also will be considered this point, and promptly at the end it will penetrate the old split pin (127a) of cover (156) lower edge top, the end fully when arc burning, and the end length of cover is d.The value of general C is about 0.08 inch, and d is 0.4 inch.When flange (307) with the shoulder protruding (327) (Figure 10) contact after, just moving inward of electrode stopped.The size in hole (325) is what to determine in this wise, even the top of electrode arrives end cover 156(Figure 19) inside surface but do not penetrate the end and just stopped during cover.During the cutting operation splitting carries out, pin pulls out pull tool (328) pin is engaged, as long as pin (127) is grilled thoroughly, pin pulls out pull tool and just pulls out pin fragment (155) (Figure 21,22), and nut fragment (153) is then taken away by fetching tool.

Hole (329) and (331) (Figure 10) have penetrated last two the relative sidewalls of collets (315).The axle in two holes is approximated to the right angle mutually, and with hole (325), the axis of electrode (247) and clamper (303) is then approximate at 45.Hole (329) and (331) are all led in groove (313) zone of lighting electric arc.Also porose (333) (Figure 10,13) on two opposing sidewalls of collets 315, this hole also is penetrated in the groove (318) of lighting electric arc.Pipe (335) and (337) (Figure 13) put in hole (329) and (331), and rest in the shoulder protuberance place between the internal and external parts of hole.Flexible pipe (341) and (343) (Fig. 3) join with pipe (335) and (337).The outer termination of flexible pipe is received on the public conduit (347) by manifold on bifurcation shape parts or manifold fittings (345) again.Common conduit is then received suction filtration system (349) (Fig. 1).Pipe (335) and (337), flexible pipe (341) and (343), bifurcation shape parts (345), public flexible pipe (347) and suction filtration system all are placed on the lower bottom part of pond (222).

Suction filtration system (349) (Fig. 1) includes a suction pump (351), hay tank (353) and (355) and a gas separator (357) that inserts between the hay tank.There is individual cartridge filter hay tank (353) lining, it can decompose from old split pin assembly (100) isolate bigger radioactive particle (general minimum dimension is 50 microns) the cutting fragment down, hay tank (355) then has a cartridge filter that is used for separating residual small-particle (generally minimum dimension is 5 microns).

Gas separator (357) is separated gas from water.Gas mainly is hydrogen, and the amount of oxygen is little, need not consider its radiation injury problem.When no longer operating behind the cutting apparatus complete operation or in a long period, take top cover away from jar (353) and (355) with a long handle instrument.Take out cartridge filter with another long handle instrument subsequently and in reject chute, clear up.The gas that comes out from separation vessel (357) then is transported in the waste material device the containment vessel and goes.

During the cutting of split pin assembly (100), only big 0.02 inch of the hole of getting on assembly (359) radius ratio electrode radius (Figure 22) is to 0.025 inch.The aspiration of pump (351) is suitable, to discharge the water in the little space between electrode (247) and the hole, but also enough water must be arranged to take away the chip that is accumulated in together.The turbopump of a high power capacity (351) can be taken away the chip of heaping.This pump has two main tasks: the first, and it is by the water in hole or inlet (329) and (331) and hole (333) suction pond 222.These water are just pulverized from electrode tip electric arc and are divided the place of the effect of leading to wash away chip.Chip passes through filtrator (353) and (355) and gas separator (357) (Fig. 1) by the water guiding.The diameter of inlet (329) and (331) is bigger.Second, it goes up the surface (319) of upper groove (318) and the gap between (321) by nut (145) and guide block (315), especially siphons away by flange (323) on the wall (319) (Figure 10,13) and the gap Jiang Shui between hole (333).Fixed bigger of the size in these gaps so the water yield that siphons away from pond (222) is very big, generally is 4 to 10 times by through hole on the electrode (309) institute discharge of pump, also is that the about 2-5 of per minute adds human relations.Because the water yield of drawing from the pond is very big, flows through flexible pipe (343), (345) and (347), the speed and the acting force of the current of hay tank (353) and (355) and gas separator (357) are also very big.Gu will particle (chip) and bubble all thus current take away.

Figure 23 shows the bottom of downcomer (LGT), and Figure 23 A is the cross-sectional view that is contained in the old split pin assembly on the conduit flange.The section of downcomer is normally foursquare, and flat vertical wall (127) is arranged, and an annular flange (125) is welded in the lower end of these walls.Having two through hole (110) (in its top side) (111) and bottom side (112) of 180 ° of being separated by to be processed with counter sink on flange, is to be used for (only having drawn on synoptic diagram one) of construction opening pin assemblies.An opening (126) (must be called " rat hole " by its shape) is arranged on wall directly over each hole, a space that nut (130) is installed is provided.Because only therefore some can be only limited to the perimeter of " rat hole " near the place of nut to nut in " rat hole ".The work that the split pin assembly is installed on the flange comprises: upwards insert a pin by above-mentioned through hole, to pin, and the shoulder flange (113) of the flange (131) of pin and nut is fixed in the annular space of counter sink separately tightly.A cap (128) is inserted in the groove at pin top, again a round bar (910) by inserting in the block in 180 ° the hole of radially being separated by, so that pin lock is tightened on the nut.

In practical application of the present invention, old split pin assembly (Figure 23 A) is by new split pin assembly replacement.The same with old split pin assembly, new split pin assembly (133) (Figure 25) comprises a split pin (127b) and a nut (135) (Figure 26).New split pin (Figure 23) has a flange (137), and bifurcated or limb (139) stretch out by the one side of flange is whole, and the pin body extends to another side.The end of pin body is the bar (141) that has groove (143), and the central axis of these grooves is separated by 90 ° along periphery, so has 4 grooves on each bar, attacks some screw thread (145) on the pin body between flange (137) and the bar.

New nut (135) (Figure 25,26) comprises a ring center section (151), and it has attacked internal thread, its size just in time and the thread segment (145) in the split pin (127b) match.Cover (152) at the bottom of stretching out one from central segment (151) one ends, and stretch out a garden ring (153) at the other end.On the nut of ring (153) bottom, garden, alongst go up some and have teeth groove.On the surface of garden ring (153) a plurality of holes are arranged.The center in these holes is along 90 ° of peripheral intervals.Locking cap (157) is fixed in the hole (155).Locking cap (157) has a base (159), stretches out a tubular portion (160) from base.The lower surface at locking cap base (159) top is connected mutually with the top of garden ring and locking cap is fixed on the garden ring (153).The ring surface backfin of base garden is the outside of (155) in the hole.In backfin face (161) and the recess holes similar to frustoconical shape.Because the backfin head gets base and tightly fixes garden ring,, can prevent that also locking cap is with respect to the rotation that encircles even when between nut body (135) and locking cap (157), being added with very high moment of torsion.Show the situation of the nut of handling through backfin (135) on Figure 25 and 26.

Figure 27 shows a new split pin assembly (133) and is fixed on situation on the flange (125).Nut (135) is fixed in the counter sink (131), and the flange (137) of split pin (127b) puts in down in the counter sink (162), the caudal furca portion (139) of split pin (127b) flexibly with upper core plate in a hole wall mesh together.Tubular portion (160) crimping of locking cap (157) is advanced in the groove (143) of new split pin (127b) bar (141).Tubular portion (160) just crimping advances in two grooves (143) relative in each new split pin.For a split pin, the tubular portion (160) that crimping is advanced groove normally carries out simultaneously with the expansion at the peak place on caudal furca portion surface.In other cases, crimping is advanced the tubular portion of groove along central plane centering between the caudal furca portion (139).

To narrate the situation that replaces old split pin assembly among the present invention with new split pin assembly now.The work in this stage is with fetching tool (215) (Figure 28-32), and new nut container (218) (Figure 33-36) and pin insertion/Twist clamping tool (219) (Figure 37-47) are carried out.

When above the pond, looking down, fetching tool (215) (Figure 28-32) comprises a vertical foundation plate (531) and a horizontal leveling board (533), this two boards has been formed a right angle and has been supported, the similar shelf of transverse slat (533), guide rail (535) and (537) are contained near the coboundary of plate (531) respectively and near the outward flange of plate (533).Can slide along each guide rail in bolster (539) and (541).A carriage (543) is being supported in bolster (539) and (541), and the mechanism of fetching tool just is installed on this carriage.Fluid-pressure transmission device (545) by a clamp (547) and an actuating arm (548) (Figure 31) can make carriage (543) move horizontally along guide rail (535) and (537), and hydraulic actuator (545) is contained on the flat board (533).The extreme position that carriage (543) inwardly outwards moves is limited by block assembly (549).A horizon bar (551) is arranged in the assembly (549), screw thread has been attacked in its outer end, a flange (553) is then arranged (Figure 30) at medial extremity, " medial extremity " refers to towards an end of conduit (543), and " outboard end " is meant an end that leaves conduit (543).Bar 551 Twist and lock with nut (557) to a carriage (555) that is fixed on the transverse slat (533).Position at carriage (555) upper boom (551) is adjustable.The inboard of carriage (555), a nut (559) is arranged on the bar (551), it can (551) Twist move adjusting position along bar, and lock with nut (561), the inside surface of the wall (563) of box structure on the carriage (565) just defines the position that carriage (543) moves inward with after baffle ring (553) contacts.Outwards moving of carriage (543) is to meet (Figure 30) that nut (559) back limits by the outside surface of wall (563), and the moving range of general carriage is about 11 inch.

Fetching tool comprises a clamper (566), clamper has a stationary jaw (567) and a movable jaw (569) (Figure 29), just can bite the old nut fragment that to remove or new nut (the 135) (Figure 25 that will load onto when these jaws are closed, 26) stationary jaw (567) stretches out from wall (571), and this arm is installed in one has the outer arm (573) of the sledger (575) of mobile pivot to go up (Figure 32).Movably jaw (569) is by stretching out in the slide block (581), and slide block is driven by the piston rod (577) of hydraulic gear (579) and slides.Have a pin (583) on the slide block (581), this pin can be in the sleeve in the arm of stationary jaw (567) along towards with the direction of leaving stationary jaw on move (Figure 29).Elbow at sledger (575) is fixed to lever on the pivot (585) with bolt, and this pivot can rotate in bearing (587), and bearing seat then is supported on the wall (589) of body structure (565) by a base block (591).Just rotation of sledger (575) during along the mobile guide block of guide rod (595) (593) (Figure 29,30), guide rod (595) frame at the wall (563) of box shape structure (565) with above the wall (597) relative with it.Guide block (593) can slide along guide rod (595) under the driving of the piston rod (598) of hydraulic gear (599).Near medial extremity, a sliding pin (603) is arranged (Figure 30) on the inner webs (601) of lever (575), this pin (Figure 29) matches with groove (604) on the guide block (593), and slidably.When guide block (593) is mobile along guide rod (595) with regard to activation lever with respect to downcomer flange (125) or container (218) to-and-fro movement flatly." medial extremity " of so-called lever (575) just is meant an end that leaves jaw (565) and (567), and " outboard end " refers to the end towards jaw.Driving shaft (585) is received on the piston rod (607) that promotes hydraulic gear (609) by shaft coupling (605), when the wall of flange (125) or container (218) need be cleared up, this gear train can and be attached thereto the jaw that connects with bell crank lever (575) and rise.The horizontal hunting of jaw (567) and (569), that is clamping device swings to downcomer (113) or container (218) (Figure 33) time, the bolt (611) of Shi You Twist on stationary jaw (567) comes spacing.On the position of advancing or rotating, clamper (566) is contacted and stop motion with the inner side of downcomer flange (125) outside or container by the termination of bolt (611).Bolt (611) can be locked on any position by nut (613).

If see down above the pond, Figure 34 just shows the situation of new nut container (218) when being horizontal.Nut container (218) frame is gone up (Figure 34) at carriage (711), the carriage (712) that carriage (711) inserts/Twist clamping tool (219) from support pin (Figure 38) reaches a certain height, each nut (135) (Figure 25,26) all is in fetching tool (215) from the position that container (218) is taken away on this position.On this height, when taking nut away, can also correctly nut be put in the counter sink (130) (Figure 23,27) of downcomer flange (125) with fetching tool.Also have a leveling board (713) on carriage (711) top, horizontal garden plate (715) with regard to frame on it.The exhibition angle of this flat board is about 270 °, and the annulus (717) of a spill is arranged, and can be used as the warehouse of nut.New nut (135) is arranged in this annulus.Nut in annular recess (717) is above the upper limb (719) of groove, so fetching tool (215) jaw (567) and (569) (Figure 35) can be bitten these nuts.End near nut storehouse (717) has a load port (721).Load port (721) has a funnel (722) (Figure 34), so as above the pond by a long tube (not shown) with the nut nut storehouse of packing into singly.The other end in nut storehouse (717) has a block (723), defines the border of non-loading area with it.Each leans against this end nut on the block (723) and just all is on the position that can be taken away by fetching tool (215).A rotary fluid power device (725) is contained on the flat board (713).This rotary fluid power device (725) has an arm (727).When hydraulic actuator moves, arm (727) will be arranged in nut in the nut storehouse (717) by counterclockwise pushing block (723) (as see among Figure 12) to, arrange the nut of getting well like this and just be in successively on the position that can be taken away by fetching tool (215).Generally can arrange 24 nuts approximately along nut storehouse (717).Be embedded with a switch near on the flat board (713) of block (723).There is a carriage in the bottom of arm (727), and a magnet is housed above.When arm (727) swung to position near block (723), this switch is action just, sent on the control desk of signal mechanical arm control center to the deck, and the expression container is empty.

Dull and stereotyped (713) stretch out garden plate (715) at the offside of load port (721).A back up pad (733) is arranged on this plate, and this back up pad is funnel (737) usefulness of loading conduit (735) and this instrument for split pin that pin inserts/Twist clamping tool (219).Dull and stereotyped (713) also have a pin one to insert the block (739) of removing son (741) usefulness of/Twist clamping tool.Figure 38 shows above the pond situation when container and pin insert/Twist clamping tool and look, and just their profile is projected in the situation on the surface level.Except funnel (737), the part of pin-insertion/Twist clamping tool all is contained on the vertical substrate (743), and can move.Substrate (743) is suspended from the limit of the horizontal trapezoidal plate (745) of angular support frame (712) (Figure 37,38).Angular support frame is contained on the compoboard (747), and compoboard then is to be suspended on firm pedestal (748) successively to go up (Figure 38).The action element of pin-insertion/Twist clamping tool is contained in one can be on slide plate or the last carriage (750) that slides of bolster (749) and (751) (Figure 37,38).These slide plates or bolster drive (Figure 37) by hydraulic gear (755), can flatly slide on guide rail (753).Also be provided with block (757) and (759), they with bolster (749) contact with (751) with respectively to element advance and retraction movement is carried out spacing.In progressive position (742), removing son (741) just can (135) Twist attacks (Figure 25,26,41) on the threaded part to new split pin (127b) with nut.In deposit position (744), can put into pin-insertion/Twist clamping tool (218) lining to new pin (127b).

In pin-insertion/Twist clamping tool a container (765) is arranged, from the inside, the fixedly rolling ring of ball bearing (771) is to be supported on (Figure 41) on the wall of container (765), and rotation rolling ring (773) is then driven by a tubular shaft (775).Bearing (771) is by retainer (776) axial restraint that is screwed on the container (765).Retainer (776) is fixed on the connector (778), and unitor then is screwed on the carriage (750).Pinion wheel (777) (Figure 41,45) is fixed on the axle, and can rotate with axle (775).Axle (775) is at the processed shoulder of its outboard end, and a spanner arm (779) (Figure 39,41) then is clamped on the shoulder end.The spanner arm has a hollow stem (781), this bar be clamped in axle (775) and remove, and instrument 219 is being with new split pin (127b) to turn back to operation (advancing) position (742).

The split pin (127b) that rides over now on the blade (815) just can be fixed on the flange 125.Split pin is driven by hydraulic actuator (891), rotates suitable angle to a direction or another direction.Before this, nut is put instrument (217) and is placed in the counter sink (131) (Figure 27) by getting one.Hydraulic actuator (891) (Figure 39,41) starts, and the shank of new split pin (127b) is passed threaded portion phase-splitting on the Kong Bingyu nut on the flange 125 twist and join.Prevent that with pin (875) nut is ejected (Figure 37,40).Spanner (741) is moved on on the position of advancing from the position above the nut by the driving of hydraulic actuator (785), and spanner is placed on certain angle position by hydraulic actuator (821), so that nut (135) is screwed in the split pin.Now spanner is withdrawn on the keyway position engaged on its keyway and the nut by hydraulic actuator (785).Hydraulic actuator (821) just starts and rotates spanner, and spanner rotates an angle, is generally 36 °, and nut just is screwed into 36 ° on pin.If the keyway of spanner does not have to be meshed with the keyway of nut in the time of at the beginning, they have just meshed together when rotating for the first time so.Then hydraulic actuator (785) starts and makes spanner (741) and nut throw out of gear, and vertically promotes from the nut top and to leave away, and spanner is resetted and is repeated the above-mentioned operating process of tightening by hydraulic actuator (821).Thisly tighten operation and be performed until the bottom that spanner is seated in counter sink (147) and just stop.

When wrench bump limit switch L3SW18, switch is action just.The every action of L3SW18 once, just action is once for relay (not shown).As what announce at Calfo, this device comprises a counter and a display that is used for showing counting.The every action of relay once, just action is once for counter and display.Usually with low moment of torsion nut (135) when fixing, spanner (741) generally will clash into limit switch 70 times.If before normal count value showed, spanner had just stopped, and will produce maloperation so, just must screw down new nut (135), new nut and newly pin (127b) must scrap, and on bar (783) meet at right angles.By a sleeve (787), the hydraulic actuator (785) that promotes usefulness (Figure 43) is contained on the openend of hollow stem (781).(789) Twist enter the termination of driving stem (791) to the piston rod of hydraulic actuator, and driving stem can slide in the opening of bar (781).At the other end, there is a sleeve (793) to be fixed on the bar (791).Spanner (741) has an arm (795), and an end of arm has a protuberance (797) that has keyway, and the other end has a bracket holes (799).In the bracket holes end, arm (801) and (803) cross out from spanner (Figure 40), and spanner is contained on sleeve (793) bar between sleeve flange and the seat ring (805), and can rotate, and seat ring then is screwed the end at driving stem (791).When hydraulic actuator moves, driving stem (791), sleeve (793), spanner (741) and seat ring (805) all are picked up, and throw off with the tight nut (135) of Zheng Zai Twist, make spanner readjust can the tight operation of the continuous Hang Twist of Jin of Ji state.

Arm (801) has a pin (807) (Figure 40).At pin (807) with between the pin (881) of spanner arm (779) clamping bar (793) emersion (Figure 41) spring (809) is arranged.Will inject the top that the counter sink (131) of downcomer (113) (Figure 23,27) flanges (125) is located at nut (135), spring (809) is aimed at the head (797) of spanner (741), that is to say with axle (775) coaxial.A pin (813) is arranged on the arm (803) equally.When pin-when insertion/Twist clamping tool (218) is in stored position (744) (Figure 38), pin (813) contacts with an end of block (739), spanner (741) is just revolted the effect of spring (809) and is left its center, therefore a new pin (127b) just can be put into blade (815) (Figure 34,41,47) on.When pin-insertion/Twist clamping tool from the position (744) when removing, spanner head (793) just by spring (809) La Hui Dao the tight position of Twist.

Pinion wheel (777) (Figure 45) is driven and comes one of back rotation to give fixed angle (generally being 36 °) by a tooth bar (817).Tooth bar (817) is by a hydraulic actuator

When using pin-insertion/tightening tool (219) to tighten or unscrewing nut (135), the protuberance (797) that has keyway (Figure 41) is on the coaxial position with axle (775).Tooth bar (817) on both forward and reverse directions during translation just the axis (859) around axle (775) rotate spanner.Spanner arm (779) (Figure 39) end of upper boom (781) be hung with a block (861), block (861) has an extension (863), it stretches out in the end of bar (781), and is fixed on the end of spanner (741) with a fixed screw (865).Block (861) makes spanner head (797) aim at axis (859), to prevent spring (809) spanner head (797) is pulled away from axial location.

Hydraulic actuator unitor (827) (Figure 39) is having a swivel arm (867) on relative another surface with pedestal (829).Swivel arm (867) has a pivot pin (869) on it stretches out the end of unitor (827).Pin (869) upper support a rotary connecting rod (871), and the end that connecting rod drives a blocking arm (873) blocking arm has one to compress pin (875) (Figure 37,39,40).A spring pin (877) is equipped with at middle part at swivel arm (867) two ends, and connecting rod (871) then is equipped with pin (879) between the two ends.Spring (881) links to each other with (879) with pin (877).When normal use pin-insertion/tightening tool (219), spring (881) will compress pin (875) and locate head (797) coaxial cable that makes it with main shaft (775) and spanner (741).When nut (135) when being tightened, pin (875) compresses it, and when nut was unscrewed, pin (875) also compressed nut (135), just pin (127b) had also been unclamped when unscrewing nut like this.When pin-insertion/tightening tool (219) is on the pin apparatuses stored position (744) (Figure 31 8), blocking arm (873) contacts with funnel (737), so pin (875) is just by blade (815) (Figure 41,47) Shang Fang position is removed, and a new pin (127b) just can be contained on the blade.

The blade (815) that new split pin (127b) is housed is contained on the sleeve (883) of bar (885) one ends, and makes it to fix and compress with pin, and bar (885) has keyway (Figure 39,41) on end (887).The end that bar (885) has a keyway is attached on the piston rod (889) of hydraulic gear (891) by a unitor or shaft coupling (893) and a spring pin (895).Hydraulic gear (891) is contained on the carriage (896), and carriage then links with unitor (893).Piston (891) can drive forwards bar (885), and a new pin (127b) that is contained on (riding) bar just enters in the following counter sink (162) of downcomer, and is screwed in a new nut (135).

The caudal furca portion that inserts two split pins (127b) in the downcomer (113) each other must be at an angle of 90.This directional operation (Figure 39) is finished by hydraulic actuator (897).Hydraulic actuator (897) is contained on the unitor (778).Its piston rod (899) (Figure 41) passes unitor slidably, and with in the groove in unitor (Figure 41,44) lining movably cam bit (901) engage.A groove is arranged on the cam bit (901), and cam bit (Figure 44) is meshed with a Cam Follower or roller (903) in groove.Roller (903) and a rotating driver (905) link, and this driver is meshed with bar (885) also with spline can be at sleeve 907(Figure 41) in rotation.Piston rod (899) just makes bar (885) from its centre position when either direction moves and the pin (127b) that is connected on this bar rotates 45 ° to a direction or another direction, and therefore a pin (127b) has just become 90 ° of angles with second pin.

A new split pin (127b) is being installed in the process of blade (815), new pin preferably is screwed in the end (Figure 47) of a long duct (909).Pin one insertion/tightening tool (219) moves on to deposit position (744) (Figure 38), just blade (815) is exposed out in this position stop (739) and funnel (737).Just carry out such operation subsequently, promptly make pipe (809) with split pin tail justice portion (129) Shin on blade (815).Then just back off spiral and must carry out aforesaid operations more again of pipe (809).The same available computers of the bump of spanner counts, yet has a counter that its advantage is arranged separately, even because manual operation or computing machine when damaging, can obtain counter value with it.Spanner (741 stop after, to adjust again it, and with the high torque value Lai Twist jack panel of accurately determining (135).High moment of torsion is provided by tooth bar (817) and pinion wheel (777) by fluid pressure drive device (821).High moment of torsion is that a valve by pressure duct obtains, and the pressure of this pressure duct is in advance through accurately measuring.

Nut (135) generally has 10 spline bars, and 36 ° at interval of adjacent two key bars evenly distribute on week in the garden.In the tight operation of beginning Jin Hang Twist, nut and spanner are mutually adjusted the position of oneself, so that the spline of spanner enters in the groove between the nut spline.For the first time and in the later operating process each time, spanner all accurately turns over an angle of having determined, is generally 36 °, thus when spanner (741) when falling, its spline accurately and on the nut (135) groove between the key be meshed.Spanner turns over, and at the sidewall of downcomer (113), raises up through the perforate bossing on the downcomer of nut (135) top.Spanner clashes into once, limit switch L3SW17 and L4SW17(Figure 40) just move once.In addition, hydraulic drive mechanism (821) has a pressure switch, and when hydraulic drive mechanism (821) when spanner is pushed ahead stroke terminal, pressure switch is just closed.Hang down the bump each time that is taken place before the torque condition when spanner stops at, switch L3SW17 and L4SW17 specific pressure switch are closed earlier.When spanner stopped, it stopped before bump finishes.The pressure switch closure, but limit switch L3SW17 and L4SW17 are not closed, perhaps closed after the pressure switch closure.Separately pilot lamp was all once bright when pressure switch and L3SW17 and/or L4SW17 were closed.Bright when the pilot lamp of limit switch L4SW17, and the pilot lamp of pressure switch does not work, perhaps the pilot lamp of limit switch bright after when bright again, just make operating personnel recognize that therefrom spanner (741) has stopped in low torque condition.

Also there is same signal to produce in high torque condition.High moment of torsion is provided by drive coil.When pressure reached predetermined value, pressure switch was just closed.Spanner before slack under the high torque condition, limit switch L3SW17 with/or L4SW17 is more closed earlier than a back pressure switch.And spanner (741) is when stopping under accurate high torque condition, switch L3SW17 and L4SW17 closure, but pressure switch is or closed after the limit switch closure, otherwise closed after the limit switch closure.Whether bright the action of and the switch of pilot lamp be corresponding.

Importantly nut (135) must be fixing; It just can not separate with pin or be loosening like this.Old nut (130) (Figure 23) Twist passes and fixes with a drift bolt (910) on old pin (127a), and the drift bolt two ends are welded on the nut again.This structure is inappropriate for new pin (127b) and new nut (135), because can not weld new nut under water.New pin (127b) stretches out on nut (135) (Figure 27).When the nut (135) of Jia working drawing Bei Twist to pin, just on it, fixed a pin cap (157) (Figure 26), the tubular portion of locking cap is the same high with the bar portion (141) of pin (127b).After Luo Mu Twist went up to pin (127b), locking cap advanced in the groove (143) that faces toward mutually on the pin, in case the nut loosening that shotpin nails on regard to crimping.

Figure 47 and 48 shows a new split pin assembly (100), and it is contained in the last counter sink (102) on downcomer (113) flange (104).Split pin assembly (100) comprises a new split pin (127b) and a new nut (135).New pin (127b) has a upper pole part (137), and two pairs of grooves that face toward mutually (139) are arranged in the bar portion.The collar (141) is from protruding the stretching out of shoulder at nut (135) top.The collar (141) hole, garden (155) radially arranged.Take locking cap (157) out of when nut (135) is made, locking cap is advanced in the hole 155 by backfin.Locking cap has a base (159), stretches out a garden cylindricality sleeve pipe (160) above it.Sleeve pipe (160) and bar portion (137) coaxial cable that has groove (139), and barre portion (137) cover is inside.Drive to-and-fro movement in ball jacket when new split pin assembly (100) is installed to flange (104) (821), the piston rod of hydraulic actuator (823) links with the spring pin (825) that is screwed in tooth bar one end.An annular gear train coupling head (827) is (Figure 39,45) that are screwed on container (765).The mounting (829) of hydraulic actuator (821) is screwed in coupling head (827).Piston rod (823) can slide in the sleeve (831) on mounting (827).The piston (not shown) of hydraulic actuator (821) be the both-end head a piston rod wherein arranged, from stretching with the corresponding other end of bar (823).One extension (833) is arranged (Figure 45) on the piston rod of this other end, cylindrical block (837) and target (839) that (833) are the C type by a threaded pin (835) and a longitudinal profile link.Nut (841) is fixed on the pin (835) with a split pin (843).When nut (841) both forward and reverse directions was rotated, block (837) just can rise or fall.When piston and tooth bar (817) when moving forward, the front end of block (837) just contacts with the end (845) of hydraulic actuator (821), so just defines travelling forward and the rotation angle of pinion wheel (777) of tooth bar.The piston (not shown) of hydraulic actuator (821) is with the motion of lower speed, so cause damage as the end (845) of block (837) and the gear train Shi Buhui that contacts.The position of block is set accurately, just can accurately sets the angle that pinion wheel (777) rotates.A magnet (847) is arranged on the target (839).When piston rod extension (833) during in outmost position, this piece magnet just makes switch L3SW18 action, and just makes switch L3SW17 action when innermost position.Switch L3SW18 and L3SW17 are contained on bar (849) and (851), they all are screwed on clip (853), clip then is fixed on the gearing (821), bar (349) has a longitudinal groove (355) so bar can slide up or down, magnet alignment is contained in the switch L3SW18 of piston prolongation (833) outermost.In order to make the ratio of precision that obtains the better of proximity switch L3SW17, a microswitch L4SW17 is housed also.This switch, is started by the bolt (857) on the block (837) when being in innermost position at tooth bar (817).When last, this assembly puts in " rat hole " (163) and by the edge of conduit (130) wall (165) and props up.The invention provides a bordering tool (221) (Figure 50-64) and crimping method can advance sleeve pipe 160 backfins in the groove (137).Locking cap (157) is associated in securely with nut (135) and pin (127b), can relatively rotates at the acting force lower nut and the pin of reactor coolant preventing.

Bordering tool (221) is to be used for a locking cap (167) backfin to advance in the groove on the pin (127b).This hemmer comprises a support (915), and it is made of one vertical dull and stereotyped (917), respectively is welded with a flat board (919) and (921) near dull and stereotyped top and bottom, and they are supported by trapezoidal plate (923) and (925) respectively.Vertical dull and stereotyped (917) are installed on the compoboard (not shown), this compoboard is suspended on (not shown) on the load-bearing truss successively, this root load-bearing truss also is used for the automated tool in the support works station, and will use these instruments when carrying out new and old split pin unit replacement operation.An otch (Figure 50,58) is arranged on the plate (921).Framework (927) with vertical side edge (928) and (929) and horizontal side (931) is contained on the flange coupling sleeve (933), and can rotate around a Z-axis.Sleeve (933) then is fixed on top and bottom support plate (919) and (921), and engages with horizontal side (931), so the axis of rotation axis has just been made at the center of these parts.

Angular support frame (937) is to be made of the fixing angle steel 939 of transverse slat (940), and angular support frame is contained in the bearing pin (941) of framework one end and goes up (Figure 62), can rotate, and bearing pin then stretches between two vertical side edge (928) and (929).Bearing pin is striden in the axle bush (943) that is placed on side 928 and 929.Angular support frame (937) can be gone up at the bearing pin (941) between operating position and contraction or the deposit position and rotate, and solid line is represented operating position among Figure 51, and dotted line is represented deposit position.Angular support frame (937) is gone up also has a stop bracket (945), and it engages with scalable stop screw (947), and these screws are to be gone up near end cross by the base plate of fixed support (915) (921) to stretch out.Support (937) is suspended on the framework (927), but can rotate around Z-axis together with framework.Arrow (938) (Figure 50) shows support (937) around the direction of bearing pin (941) vertical rotation, and arrow (942) shows the direction of rotating around the axle horizontal of flange coupling spindle sleeve (933).Carriage (945) and block (947) can prevent that angular support frame (937) from dropping to than dull and stereotyped (921) low position.Angular support frame (937) also has an adjustable stops (949), and when angular support frame was on punctured position, this block propped up near the end of top board (919).With reference to Figure 51, angular support frame can vertically move in the plane of drawing, and flatly moves in the direction of turnover drawing.Can think in some cases, bordering tool (221) and split pin assembly can be adjusted the orientation, make framework be supported on other position except that the upright position, also can produce from this position earlier, and then laterally (or laterally) forwards on the initial direction.

Angular support frame (937) is driven between operation and retracted position by fluid pressure drive device (951) and rotates, fluid pressure drive device (951) is suspended on one by a collar (954) can be on the bearing pin (952) that it rotates, and the collar then is screwed on framework (927) upper side edge (931).The piston rod (953) of hydraulic actuator (951) has a prolongation (955), and an otch (957) (Figure 51,56) is arranged above.Otch is meshed with bearing pin (959).Bearing pin 959 is contained on the plate (or projection) (961), and plate (961) then is welded on the angle steel (939).Bearing pin (959) is fixed on the projection (961) by lateral pin (964).Bearing pin (959) by the collar (964) (Figure 57) otch (957) between the medium bronze axle bush (962) locate.Hydraulic actuator piston rod prolongation (955) has a cam surface (963) (Figure 57) below otch (957) and bearing pin (959), and this face extends in the otch (935) of base plate (921).Cam face (963) (Figure 57) contacts with the top of screw (965), and this screw just is used as Cam Follower usefulness, and it puts in the otch (935) from lower plate (921).The position of screw (967) is adjustable.On any position, screw (965) all is locked on the flat board (921) by nut (968).

When angular support frame (937) was on the punctured position, projection (961) was among Figure 51 on the position shown in the dotted line.Along with the edge (different with the end) of slotted hole (957) contacts with bearing pin (959), coboundary just acts on downward impact on the bearing pin.When the prolongation (955) of piston rod was moved down by hydraulic actuator (951) driving, projection (961) was along with the coboundary of slotted hole (957) moves down and rotates.Angular frame (937) turns to operating position (normally level), and projection (961) just is in the position shown in the solid line among Figure 51.The motion of angular frame (937) stops owing to contacting with the carriage that has block (947) (945).When angular frame is on this position, pin (959) just with the following end in contact of slotted hole (957), as shown in Figure 51 A, slotted hole among the figure (957) is shown in broken lines.When piston rod prolongation (955) was continued to move down by the fluid pressure drive device driving, slotted hole (957) just moved on on the position of representing with solid line among Figure 51 A, and it is motionless that bearing pin (959) keeps, and angle bar frame continues to stay on the horizontal level.But when slotted hole moved among Figure 51 A the position shown in the solid line, angle bar frame (937) was because the interaction of pin (765) and lug surface (763) is done the rotation of approximate horizontal ground around the axle of bearing 933.This motion is caused by one side that bearing pin (959) heads on slotted hole (957).

Tensioning spring (967) is connected between flat board (921) the inner anchor log (969) and the anchor log (971) on framework 927 vertical edges 928, and this spring handle framework (927) and the part that links with it move to lira.Utilization can prevent that with the contacted block of another side (929) (973) of angle iron frame the framework displacement is excessive.

With screw an angle steel carriage (975) (Figure 51,52) is fixed on the side (928) of framework (927).The screw that this one or two carriage (975) is fixed on the side (928) passes a slotted hole (977), so the height of carriage (975) is adjustable.Fluid pressure drive device (979) is suspended on the horizon bar of carriage (975).A locking device (981) (Figure 52) is suspended on the sidewall (928) with a screw (984) by compound packing ring (983).Locking device 981 has a horizontal tail plate (985) of stretching inwards and one to overhanging hook (987).On tailgate (985), a tubular sheath body (989) is tightened in by on the suspended leveling board (991) of sidewall (928).The position of sheath body (989) can be regulated along dull and stereotyped (991), and sheath body can be locked on arbitrary position with nut (993).The bottom broadening of sheath body (989) is to form a shoulder protuberance between top and the bottom.There is the spring pin (994) of a taper tip to run through by sheath body (989).A shoulder protuberance is arranged on the pin (994), and a bar puts in the inside of sheath body thus.Between the shoulder protuberance of the shoulder protuberance of sheath body (989) and pin, there is one to press and compile spring (995), it pushes pin to below with its elasticity, contact with the upper surface of tailgate (985), and locking device is rotated with counter clockwise direction (shown in Figure 51 a) around frame axle (984).Fluid pressure drive device (979).Can offset the acting force of spring.An elongated portion (997) is arranged on the piston rod of fluid pressure drive device (999), and it contacts with the lower surface of tailgate (985), and rotary locking device (981) deasil.A striker or hook (1001) are arranged on the angle bar frame (937) when angle bar frame shrinks, the piston rod (999) of fluid pressure drive device (979) just shrinks, this can make locking device (981) swing to it counterclockwise to extreme position and with hook (1001) engagement, hook is to be used for fixing angle bar frame and it to take each assembly on the punctured position to.When angle bar frame was set to operating position, piston rod (999) just must stretch out, and clockwise rotated locking device (979), and threw off with hook (1001)

Near end points away from support, guide rail (1003) be fixed on the vertical rod of angle steel (93939) (Figure 51, Figure 52).Can slide along guide rail in bolster (1005) and (1007), a casing or housing (1009) are being supported in bolster (1005) and (1007).Casing (1009) is bearing in substrate (1011) on the bar (1013).These bars (1013) pass the block (1015) (on Figure 51) that is welded on the substrate (1011).Substrate and be connected to this part above plate, can be mobile with respect to casing (1009) along bar (1013), so substrate and part thereof can be arranged on the axis direction perpendicular to guide rail (1003) (the position that is parallel to the plane of bar (939) in Figure 51.The position of substrate 1011 is in case after setting up, just (Figure 52) be fixed on it on the position that sets with dog screw (1016).Flanging clamp (1017) and (1019) are contained on the pin (1021), and can rotate, and this pin then is fixed near the place, outer end of substrate.Pin (1021) is fixing by set nut (1023), and nut (1023) is screwed in the lower end of pin (1021), and is added with packing ring (1025) between nut and flat board (1011) (Figure 51,52).At the top, pin (1021) is fixed on the angle bar body (1027) with a cap screw (1029).A packing ring (1030) is arranged between the rolling bearing of angle bar body (1027) and jaw, but the shoulder protuberance of packing ring and pin (1021) nibbles tightly, and do not contact with bearing.Another packing ring (1031) then is placed between the shoulder protuberance of the rolling bearing of substrate (1011) and jaw and pin (1021).

Each guide rail but has one and presses volume spring (1035) (Figure 52).Each spring is meshed with an end of bolster (1007), the other end then be clamped in guide rail on bar (1037) contact.Spring (1035) by its elasticity with bolster (1007) and with the joining part of bolster, comprise that substrate (1011) is to outer passing; Just leave back up pad (917); From Figure 52 is exactly to push the right to.There is a prone shoulder protuberance (1039) outer end in substrate (1011).Above the shoulder protuberance, the end of substrate and garden cylinder (1041) (Figure 50 and 52) join at this, and this garden cylinder has identical curvature with the nut (135) of new split pin assembly.Bordering tool (221) and the relative position of pin-insertion/tightening tool on load-bearing truss should be such: when the angle bar frame (937) of bordering tool (221) moves on to operating position (solid line among Figure 51), because pin (965) and cam face (963) interaction (Figure 57) be just with substrate (1011) and dress part onboard, with respect to support (915) (Figure 48) outwards (from Figure 48, see be push to right-hand) push away (centering on the axis rotation of sleeve 933).Shoulder protuberance (1039) leans against the top of downcomer (113) flange (125), and at this moment the old split pin assembly of downcomer is replaced by new assembly (100), garden cylinder (1041) then accurately seating on new nut (135) (Figure 52,55).Spring (1035) makes surface (1041) and nut (135) keep Elastic Contact.In this operating period, pin-insertion/Twist clamping tool is in punctured position with the pin (127b) that straddles on its blade.

Bolster 1007 is near its place, outer end, with one can contact at the flat board (1043) that track (1003) upward slides (Figure 53).This piece is dull and stereotyped to be associated in casing (1009).The position that vertically can regulate dull and stereotyped (1043) by screw (1045) along guide rail.Each screw but uses Luo Wen Twist on every block of angle steel (939) projection (1047) (Figure 53).Each screw but has a block (1049) at its medial extremity, can by nut (1051) screw lock on any position.Therefore can be along the position that is associated in other part above the casing that guide rail is vertically regulated casing (1009) and comprised substrate.

Fluid pressure drive device 1053(Figure 51) flatly is supported on the angle steel carriage (1055) in the casing (1009).This angle bar frame is screwed on the isolation locating piece (1057) that is supported on the substrate.Bearing bracket stand or " C " shape framework (1059) are contained on the prolongation (1061) of piston rod (1063) of fluid pressure drive device (1053) (Figure 52,54,60).Bearing bracket stand (1059) with roller (1065) and (1067) support on bearing screw (1069).These rollers contact with the lug surface (1071) of jaw (1017) and (1019).At Figure 61) in solid line be illustrated in jaw and roller (1065) and (1067) on the punctured position, dotted line then is illustrated in the locational jaw and the roller of crimping.

The overall condition of jaw (1017) is shown in Figure 63 and 64.A garden shape projection (1073) is arranged on this jaw, stretch out some armed levers from (1073).An opening that inwardly shrinks is arranged on an end of projection, form a shoulder (1075).Jaw (1019) is linked together mutually with jaw (1017), and the constriction of its projection just is fixed on the expansion of jaw (1017) projection, and its side contacts with shoulder protuberance (1075).Opening in the jaw (1077) all is coaxial, and all uses pin (1021) to mesh together (Figure 52).The jaw arm extends to the both sides of projection, and a side of arm has a cam face (1071).Near the perforate (1079) that a backfin pin (1081) usefulness arranged the end of jaw (1071) and (1019) (Figure 61).Also have a perforate 1083 at same end, be used for placing a safetied pin (not shown), so that backfin pin (1081) is pinned perpendicular to hole (1079).The outline line of cam face (1071) when being in punctured position, can make jaw open (solid line among Figure 61) in roller (1065) and (1067), and roller makes clip closure (dotted line among Figure 61) when being on the progressive position.Gap length when the half garden shape extention (1085) of each projection (1073) can be made the jaw closure.

Between standby period, angle bar frame (937) is to pin on punctured position (as shown in phantom in Figure 50).When will carrying out backfin when operation, a new split pin assembly is for the crimping operation locates, and settles appropriately with downcomer, and support 937 carries out release (Figure 50) by the remote startup of fluid pressure drive device (797).Then fluid pressure drive device (951) starts, and at first carries out remote operation support (937) is vertically put down, subsequently swinging mounting (see it is to the right from Figure 50, and see it is the plane that enters figure from Figure 51) flatly.On the upper surface of substrate (1011) with its shoulder protuberance (1039) (it is located downcomer flange to be processed (104))) have good positioning.The garden cylinder (1041) of substrate then leans against on the surface of new nut (135).The backfin pin then is in the garden cylindrical section backfin of locking cap (171) is advanced on the position in new split pin (127b) the subtend grooves distributed (153).Downcomer (113) should locate like this, even the groove (153) that two subtends in the new split pin assembly (100) are arranged just in time is on the position of the bossing that the backfin that can admit locking cap (157) to go up garden post part (160) comes in.Now fluid pressure drive device (1053) starts, and makes backfin pin (1081) and (160) interlock of garden post part, and its backfin is advanced in the subtend grooves distributed.Because groove also is among the backfin load mould,, the backfin operation is carried out smoothly so just needn't accurately locate jaw (1017) and (1019) in vertical direction.

What here deliver is most preferred embodiment and best real work method and the step of selecting from the present invention entirely, but still has a lot of places to improve.Except being necessary to consider that the present invention does not impose any restrictions the essence of prior art.

Claims (13)

1, the device of the old split pin assembly of a new split pin unit replacement nuclear reactor conduit of a kind of usefulness, it is characterized in that: above-mentioned old split pin assembly includes Geju City split pin, old nut on flange that this old split pin is fixed to above-mentioned conduit, this old nut is screwed in this old split pin, and the end of this old nut cover is not screwed in this old split pin, but protrudes into the flange the inside; This old split pin and this conduit all have radioactivity, said apparatus includes the device that an electroded Metal Cutting is separated processing machine and this processing machine is installed, this erecting device is meshed the old nut of above-mentioned processing machine with the old split pin assembly of a conduit below the pond, and this Geju City split pin assembly will be changed just, above-mentioned processing machine is installed in electrode and can carries out on the position of hot line job with this old nut, link to each other with this processing machine, and between this electrode and this old nut, light the device of arc cutting, above-mentioned processing machine will be installed to such an extent that make this electrode be in a such angle, promptly make arc energy on this bolt and nut of clip, get a hole, this pierced the old nut in the conduit upper surface outside, extend to the entrance side of electric arc always, the whole zone that penetrates is stretched on the nut the not bottom of tapping always, but do not penetrate nut, this assembly just is cut into the fragment that is easy to take away like this, and do not damage conduit at all, fragment mainly includes the part of old nut and is screwed in an old split pin part in this nut, and another fragment mainly comprises the remainder of old split pin.

2, desired device in the claim 1, it is characterized in that this device comprises an electrically insulating material orienting lug that links to each other with electrode, this orienting lug also will be connected on the said modules, with electric arc old split pin assembly be cut into fragment to guide above-mentioned electrode, and don't damage above-mentioned conduit.

3, desired device in the claim 4, it is characterized in that having on the orienting lug groove, the inside surface of this groove will be processed to such an extent that can be meshed with old nut, above-mentioned conduit piece is installed in one and is used for supporting on the support of above-mentioned processing machine, and can move to and this nut engagement or disengagement with above-mentioned processing machine, also has a duct on the above-mentioned orienting lug, the inner in this duct and above-mentioned groove UNICOM, electrode enters into by this duct and is in certain and determines locational groove, be formed in the end points that produces arc cutting between electrode and the old nut, this electrode can move with respect to above-mentioned orienting lug in this duct, also has a device that links to each other with this electrode on the above-mentioned processing machine.This device can be sent this electrode to by this duct, thereby can light electric arc between this electrode and the adjacent part of above-mentioned old split pin assembly, along the direction of this electrode shift-in, gradually above-mentioned old split pin assembly cutting and separating is opened.

4, the desired device of claim 3 is characterized in that the groove in the orienting lug will be processed to such an extent that make the inside surface of above-mentioned groove not only mesh with nut, but also abuts against near the conduit flange surface of nut.The inside surface of above-mentioned groove also will be processed very accurately, makes by this surface to pass the electrode of groove and can accurately locate with the nut engagement and abut against on the flange, so that the fragment that old split pin assembly cutting and separating one-tenth is easy to take away, and do not damage conduit.

5, the desired metal separation cutting processing of claim 3 machine is characterized in that, above-mentioned groove includes the backup actuating device of a cover electrode, before the electric arc that produces on the electrode that moves inward penetrates old nut, this covering device can make electrode no longer send to old split pin inside, thereby just can prevent to damage conduit.

6, the desired device of claim 1 is characterized in that the electrode on the metal separation cutting processing machine has eyelet, and said apparatus also comprises and linking to each other with this electrode, water is delivered to the device in arc cutting district.

7, the desired device of claim 1, it is characterized in that one of above-mentioned fragment includes a part of Yi of this old nut Ji Twist goes into the above-mentioned old split pin part on this old nut, said apparatus comprises that a new nut container and one get one and puts instrument, this container is equipped with a large amount of new nuts, and a device that can link to each other with this new nut is arranged, a nut in this new nut can be placed on the appropriate location that can take away by this device, above-mentioned get one knock off have a clamper and be used for moving this clamper device and can be in the pond following above-mentioned fetching tool, above-mentioned reservoir and conduit flange are adjusted on the same operation height, and above-mentioned fetching tool and memory are navigated on the fragment of the split pin assembly that will change.This gets a side of putting instrument is above-mentioned flange, and opposite side is above-mentioned container, this clamp device is provided with to such an extent that make it pass through above-mentioned mobile device to move between first and second positions, clamp device can clamp and remove an above-mentioned fragment on primary importance, and clamp device is can clamp and new nut of in-migration on the second place, therefore this clamp device can move to from above-mentioned primary importance and remove the position of removing this fragment, equally also can move to this flange place, so that a new nut is put on the position in the new split pin of Ke Yi Twist in above-mentioned flange by said second position.

8, the desired device of claim 7, it is characterized in that being used for moving and get a device of putting the clamp device on the instrument and include the device that links to each other with this clamp device, this device can make above-mentioned clamp device move around between deposit position and progressive position, on above-mentioned progressive position, this clamp device can clamp a fragment, and on deposit position, this clamp device can clamp a new nut in the container; With the device that this clamp device links to each other, this device can forward clamp device on the position that clamps this fragment on the above-mentioned progressive position, and on above-mentioned deposit position, this clamp device can be forwarded on the position that clamps new nut.

9, the desired device of claim 8, it is characterized in that getting one puts instrument and includes first stop device, be used for backstop reciprocator on progressive position, this first stop device will preset to such an extent that clamp device is correctly entered on the position that can clamp a fragment.Get one and put instrument and also have second stop device, be used for backstop reciprocator on deposit position, this second stop device will preset to such an extent that clamp device is correctly entered on the position that can clamp new nut.

10, the desired device of claim 9, it is characterized in that above-mentionedly getting one and putting instrument and include the 3rd stop device, this stop device stops operating wheelwork when fragment of clamping device clamps, above-mentionedly get one and put instrument and also include the 4th stop device, when the new nut of clamping device clamps, this whirligig is stopped operating with this device.

11, the desired device of claim 1 is characterized in that this device includes a bordering tool that has edge-folding mechanism, with the support that this edge-folding mechanism supports, is that the stand-by state (normally on the upright position) at above-mentioned instrument uses down; The device that links to each other with this support can vertically move to above-mentioned mean level position to this support from above-mentioned general upright position; When being in the mean level position, this support begins action with the joining device of this support, so that with this support level move, make on the split pin assembly that the arrival in place of this edge-folding mechanism will handle and have good positioning, and this locking cap backfin is advanced in this split pin.

12, the desired device of claim 11, it is characterized in that having in the shift unit hydraulic actuator of a band piston rod, the above-mentioned first cover shift unit comprises first covering device that can move with this piston lever arrangement, when piston one lever apparatus when the part of its stroke is advanced by above-mentioned fluid pressure drive device, support is moved between punctured position and centre position, and the second cover mobile device comprises second covering device that can move with this piston one lever apparatus, when piston one bar when the second portion of its stroke is pushed ahead, support is moved between centre position and operating position.

13, the desired device of claim 12, it is characterized in that the second cover concerted action device comprises a camming that is driven by piston one lever apparatus, this system changes Change to the response of support to the action of piston one lever apparatus to moving in the direction that is limited by second plane usually from moving up in the side that is limited by first plane usually.

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