CN107104342A

CN107104342A - A kind of four coaxial cable termination techniques of mechanical seal

Info

Publication number: CN107104342A
Application number: CN201710243948.3A
Authority: CN
Inventors: 付贵龙; 李伟彪; 阳路林
Original assignee: STATE NUCLEAR POWER ENGINEERING Co
Current assignee: Shanghai Nuclear Engineering Research and Design Institute Co Ltd; China Nuclear Industry 23 Construction Co Ltd
Priority date: 2017-04-14
Filing date: 2017-04-14
Publication date: 2017-08-29
Anticipated expiration: 2037-04-14
Also published as: CN107104342B

Abstract

The invention discloses a kind of four coaxial cable termination techniques of mechanical seal, it is characterised in that comprises the following steps：Step 1, termination prepare；Step 2, the processing of spiral copper armour shell；Step 3, welding cable sealed support；Step 4, postwelding visual examination；Step 5, leak test；Step 6, triaxial cable joint make；Dimensional gaughing after step 7, the completion of triaxial cable joint；Step 8, sealing device are installed.Instant invention overcomes the low defect of conventional nuclear power station coaxial cable one-time success rate, in the AP1000 whole world, first three nuclear power stations of heap pass through checking, one-time success rate has reached 100%, many materials and manpower can be saved, and the advance of its technique makes joint performance is more stable, safer in operation, out-pile Nuclear measurement system TCH test channel can be made to be used 60 years under high temperature, high humidity, the harsh and unforgiving environments of high irradiation, used 20 years nuclear power station like product than ever more.

Description

A kind of four coaxial cable termination techniques of mechanical seal

Technical field

The present invention relates to a kind of nuclear power station out-pile nuclear measurement system (NIS) coaxial cable termination technique, more particularly to one kind Four coaxial cable termination techniques of mechanical seal, belong to out-pile nuclear measurement system technical field in nuclear power station.

Background technology

Out-pile nuclear measurement system (NIS) is the neutron revealed using out-pile nuclear instrument detection reaction heap come anti-in nuclear power station Core power, changed power and power distribution are answered, to control reaction speed and triggering shutdown, it is ensured that reactor safety.Out-pile The signal that nuclear instrument is detected is extremely faint, is A grades of μ.Therefore, the termination work of out-pile nuclear measurement system instrument cable and cable Skill is extremely difficult to be grasped.In history, the one-time success rate of the second stage of out-pile nuclear measurement system instrument cable termination of Qinshan nuclear power plant only has 47%, key issue is fuzzy, logical order imprecision of the parameter requests such as the incomplete, size of process steps etc.；Big sub- Once occurred two cause out-pile nuclear measurement system instrument coaxial fittings on gulf ridge Australian trader fortune nuclear power generating sets causes unit quilt extremely Compel Shutdown up to 96 hours, field gulf nuclear power station also causes the insulating properties of TCH test channel to continue because joint sealing performance is bad Decline, the key reasons of these quality problems is that termination technique is advanced, technical requirements are not strict, therefore the joint that termination is completed In the presence of serious hidden danger of quality.And state-of-the-art AP1000 nuclear power stations out-pile Nuclear measurement system coaxial fitting quantity is more at present, Every unit joint quantity 136, often set termination material will U.S. dollars up to ten thousand, sufficiently expensive, each joint of termination averagely time-consuming 2 Individual hour, therefore, one-time success rate, which lowly causes to do over again, can waste substantial amounts of fee of material and postpone construction speed, and AP1000 Nuclear power station out-pile nuclear measurement system also requires to perform its measurement function under accident conditions harsh and unforgiving environments, and projected life is 60 Year, to have more 20 years in life-span of nuclear power station than ever, therefore, conventional termination technique especially sealing technology can not be met The requirement of current advanced technology nuclear power station.

The content of the invention

The technical problem to be solved in the present invention is：There is provided a kind of one-time success rate height, saving material and manpower, make joint The more stable safe mechanical seal of performance four coaxial cable termination techniques, solve conventional nuclear power station heap outer core measurement system Instrument of uniting coaxial cable termination one-time success rate is low, waste of materials, the problem of postponing construction speed.

In order to solve the above-mentioned technical problem, the technical scheme is that there is provided a kind of four coaxial cables of mechanical seal Termination technique, it is characterised in that comprise the following steps：

Step 1, termination prepare, and have the following aspects：

Step 1.1, selection production environment temperature are more than 0 DEG C, and relative humidity is below 80%；

Step 1.2, cleaning debris, debris include dust, it is ensured that whole termination process clean environment；

Step 1.3, making ease of Use platform, make end on operating desk；

Step 1.4, cleaning junction box, make free from dust and debris in case；Cleaning enters all cables in junction box；Cleaning institute There is end joining tool；

Step 2, the processing of spiral copper armour shell, there is following steps：

Step 2.1, the fire-retardant oversheath for divesting cable copper armour；

Step 2.2, the cleaning of copper armour；

Whether step 2.3, inspection copper armour damage；

Step 2.4, triangle hack-file is used, along the circumferential direction cut copper armour, expose triaxial cable；

Step 2.5, burr and overlap with square file repairing copper armour port；

Step 2.6, using nipper plier, copper armour port is modified into the bell shape of outward flanging；

Step 2.7, clean out copper powder；

Step 2.8, correction copper armour；

Step 3, welding cable sealed support, comprise the following steps：

Step 3.1, the assemble sequence for checking each part of sealed support；

Step 3.2, sealed support packed into cable；

Step 3.3, inspection electric iron special, clear up the dirt and residual oxide of Electric iron nozzle；

Step 3.4, the socket for two plugs of electric iron being all inserted into pressure regulator, connect thermocouple and digital display thermometer monitoring Electric iron temperature；

Step 3.5, pressure regulator switch on power preheating electric iron special；

Step 3.6, preparation triangle copper cash, the oxide layer of clean surface is removed with grinding pad；

Step 3.7, the foreign matter for cleaning out triangle copper line surface；

Step 3.8, triangle copper cash one end is put into the helicla flute of copper armour；

Step 3.9, with electric iron and pure tin welding wire spot welding triangle copper cash end；

Step 3.10, with file unnecessary weldering meat is repaired, it is smooth with file rasion；

Step 3.11, clip triangle copper cash with nipper plier and rotated along copper armour helicla flute to cable termination, filling copper armour Helicla flute；

Step 3.12, with special phenolic resin clip, clamp the bronze cylinders of sealed support, make sealed support along copper Armour helicla flute rotates to cable termination direction；

Step 3.13, cut beyond the triangle copper cash of sealed support and smooth with rasion；

Step 3.14, the stainless steel hex nut unscrewed on sealed support, cut oversheath reserved in advance, are washed into two halves It is enclosed on four coaxial cables and blocks stainless steel hex nut；

Step 3.15, cable and sealed support erected together, cable clamped with the clamp base vise on operating desk, The jaw of bench vice will pad clean calico in advance；

Step 3.16, a bit of oversheath reserved in advance is cut, plug is arrived between outer triaxial cable sheath and copper armour；

Step 3.17, three cotton swabs are taken, remove cotton swab head, plug is between the above-mentioned oversheath filled in and copper armour, three cottons Label are along the circumferential direction mutually 120 °；

Step 3.18, the solder stick for cutting 22~24 inches are standby；

Step 3.19, suck scaling powder with small-sized medical syringe and inject copper armour outer surface and sealed support inner surface it Between gap；

Step 3.20, electric iron special is clipped on the cylinder of sealed support；

Step 3.21, when scaling powder is smoldered, immediately begin to filler wire and scaling powder, circumferentially rotate 360 °, remove Electric iron；

Step 3.22, wait cable support structure temperature are reduced to room temperature；

Step 3.23, pull out three cotton swabs；

The oversheath that step 3.24, extraction are filled in；

Step 3.25, cleaning postwelding surface, remove welding slag and splashing；

Step 4, postwelding visual examination：Triaxial cable oversheath is checked, in the event of serious damage, it is necessary to from step Rapid 1 starts to terminate again；

Step 5, leak test：

Step 5.1, it is buckled togather with special leak test device two halves, one end is buckled in the bronze cylinders of sealed support On, the other end is buckled on copper armour, and note is taken away behind the position of copper armour one end；

Step 5.2, the enough electric adhesive tape sealings of use winding at the gap of copper armour and leak test device；

Step 5.3, the stainless steel tube clamp of two sets of leakage detection apparatus slipped over sealed support, it is interim to place；

Step 5.4, on " O " type sealing ring of leak test device coat a thin layer of lubricating grease；

Step 5.5, leak test device two halves are buckled together, one end is buckled on the bronze cylinders of sealed support, another End is buckled on the electric adhesive tape on copper armour；

Step 5.6, two stainless steel tube clamps are inserted in again；

4 stainless steel tube clamps that step 5.7, fastening are inserted in, make two parts of leak test device tighten together；

Step 5.8, aerating device and leak test device linked together；

Step 5.9, the regulating valve of opening nitrogen cylinder are inflated into storage tank, until the pressure gauge installed in such as storage tank shows Show 20Psig, close the regulating valve of nitrogen cylinder, stop inflation；

Step 5.10, the valve of opening storage tank are inflated to leak test device, if the pressure gauge of storage tank is in a slight decrease, The slow regulating valve for opening nitrogen cylinder makes the pressure gauge reading of storage tank recover 20Psig again, closes regulating valve；

Step 5.11, the weld seam between copper armour and the bronze cylinders of sealed support smear leak detection liquid；

Step 5.12, visual observations, if without generation bubble in 5 minutes, then it is assumed that welding is qualified；

Step 5.13, if it is observed that there is bubble generation, then it is underproof to illustrate welding, it is necessary to ironed again with Special electric Iron is heated, and extra increase welding wire and appropriate scaling powder weld the leak source for carrying out repair welding weld seam again；Leakage test is done again, until Untill qualified；

Step 5.14,4 pipe clamps of release, take away leak test device；

Step 5.15, take down electric adhesive tape；

Leak detection liquid on step 5.16, cleaning leak test device and cable；

Step 6, triaxial cable joint make, and comprise the following steps：

Step 6.1,1 inch of cable termination is cut away, ensure blade perpendicular to long axis during cutting；

Step 6.2, casing assembly is put, be placed on temporary position；

Step 6.3, in cable socket with cutter oversheath is circumferentially drawn, divest oversheath；

Step 6.4, in oversheath port outwards cut off external shield；

Step 6.5, inwardly print and mark in cable socket；

Step 6.6, chosen with scriber over shielding line outwards dig and gently smooth out with the fingers straight；

Step 6.7, set upper inner ring, make inner ring be close to the root of external shield line and oversheath, inner ring breach is outside；

Step 6.8, with scissors trimming external shield line make all external shield lines without departing from inner ring breach；

Step 6.9, from the place of printing of above step 6.5 divest external insulation layer；

Ring and inner ring are close to interim placement in the middle of step 6.10, set；

Step 6.11, choose out inner shield line and outwards dig and gently smooth out with the fingers straight, expose inner insulating layer；

Step 6.12, the black carbon powder cleaned up on inner insulating layer；

Step 6.13, in cable end inwardly divest inner insulating layer；

Step 6.14, semiconductor layer is divested, expose center conductor；

Step 6.16, the special pressing tongs of taking-up, grasp, ratchet is fully discharged, mould is opened completely；

Step 6.17, opening center contact pin packaging, selection silver color contact pin insertion center conductor, make center contact pin afterbody tightly Against interior insulation, pressing tongs positioning is put into, the back porch of center contact pin is abutted against on the back of pressing mold, and the U-type groove of contact pin is put into pressing tongs " CC " locating slot；

Step 6.18, keep cable and contact pin in line, contact pin is close to cable, holds pressing tongs, make two handles to Close up together, no longer put forth effort until feeling, ratchet is fully discharged this moment, and jaw can be opened completely, contact pin crimping is finished,

Step 6.19, the contact pin and cable pressed is taken out from pressing tongs；

Step 6.20, by aid, corresponding end insertion inner housing component；

Step 6.21, the contact pin that has crimped inserted inner housing component, confirm that contact pin is engaged with inner housing component firm；

Step 6.22, expansion inner shield line, cover the numb eye of inner housing component and are uniformly distributed, until after inner housing component Shoulder, trimming exceeds all inner shield litzendraht wires of inner housing component back porch,

Ring top covers inner shield line to the back porch of inner housing component in the middle of step 6.23, slip, to trim clean super before Go out the inner shield line of middle ring and inner housing component back porch interface；

Step 6.24, the special pressing tongs of taking-up, grasp, ratchet is fully discharged, mould is opened completely；

Step 6.25, cable and inner housing component be put into pressing tongs positioning, " inner shield is positioned the crop of pressing tongs close to pressing tongs Groove " pressing mold falls on middle ring,

Step 6.26, cable of holding with a firm grip make cable remain vertical with pressing tongs, hold pressing tongs, make two handles to closing together Hold together, no longer put forth effort until feeling, ratchet is fully discharged this moment, and jaw can be opened completely, inner housing component crimping is finished；

Step 6.27, reaffirm breach of the external shield line without departing from inner ring, arrangement is uniform；

Step 6.28, the inner housing component crimped by aid, corresponding end insertion；

Step 6.29, slip casing assembly, until being interlocked with the jump ring connector of inner housing component；

Step 6.30, the special pressing tongs of taking-up, grasp, ratchet is fully discharged, mould is opened completely, extract stop Pin, breaks the train wheel bridge of pressing tongs into two with one's hands, opens jaw, cable and casing assembly is put into the external shield hexagonal positioning hole of pressing tongs, closed Train wheel bridge, closes jaw, plugs latch, " O " type ring crop of casing assembly leans against the back side of pressing mold；

In line, pressing tongs handle of holding with a firm grip holds pressing tongs, makes two handles for step 6.31, holding cable and casing assembly To closing up together, no longer put forth effort until feeling, ratchet is fully discharged this moment, and jaw can be opened completely, extract latch, break The train wheel bridge of pressing tongs is opened, jaw is opened, cable and casing assembly are taken out pressing tongs, first of impression crimping of casing assembly is finished；

Step 6.32, the external shield hexagonal positioning hole for cable and casing assembly being put into pressing tongs, close train wheel bridge, closure pincers Mouthful, latch is plugged, afterbody " O " type ring of casing assembly is leaned against before pressing mold；

In line, pressing tongs handle of holding with a firm grip holds pressing tongs, makes two handles for step 6.33, holding cable and casing assembly To closing up together, no longer put forth effort until feeling, ratchet is fully discharged this moment, and jaw can be opened completely, extract latch, break The train wheel bridge of pressing tongs is opened, jaw is opened, cable and casing assembly are taken out pressing tongs, the crimping of casing assembly second impression is finished；

Step 6.34, for training test specimen, carry out 60 pounds of pull-out test, verify that workman undergoes training qualified with this, Ke Yishou Power carries out the installation of formal engineering；The joint of formal engineering is not subject to this pull-out test；

Dimensional gaughing after step 7, the completion of triaxial cable joint；

Step 8, sealing device are installed：

Step 8.1, inspection sealing each parts assemble sequence of the device and assembly orientation are correct；

Step 8.2, cleaning heap outer core probing measurement equipment carry cable connector；

Step 8.3, make sealing device open tube end inwards, slided on four coaxial cables that termination is completed, cross cable Sealed support；

Step 8.4, the triaxial cable joint and equipment made are carried cable connector are plugged in together；

Step 8.5, fasten coupling nut with thumb and forefinger, then with the circle of palm grip coupling nut rotation 1/4；

The distance of step 8.6, measurement sealed support head end and device junction tail end；

The hex nut of step 8.7, releasable joint sealing device；

Step 8.8, slip hex nut cross equipment and carry cable connector together with two copper sealing rings；

Step 8.9, to equipment cable tip side sliding sealing device is carried until cable seal support exposes；

Step 8.10, outward winding stainless steel hold-down ring and copper sealing ring and it is separated with cable seal support；

Step 8.11, the grease for cleaning out each position of cable seal support；

Step 8.12, a thin layer of oxidation-inhibited grease is coated on the screw thread of cable seal support；

Step 8.13, stainless steel hold-down ring and copper sealing ring be moved back to cable seal support, screwed with hand；

Step 8.14, the pipe of sealing device slided to the positioning of four coaxial cables；

Step 8.15, former and later two copper sealing rings are carefully slided, fill in sealing device；

Step 8.16, careful slip hex nut are simultaneously screwed to the sealing device end of thread, tighten by hand hex nut；

Step 8.17, with stiff hand or biasing spanner clamp hexagonal screw head on device junction end sealing device；

Step 8.18, mix thick-billed crow head using torque spanner, fasten in hex nut, fastener cycle, hex nut is progressively Sealing copper ring is pushed ahead, copper ring is then sealed and carries cable connector and hex nut three in sealing device cylinder inner wall, equipment Expanded between person in the presence of common pressure, when moment values reach setting value, sealing copper ring has been deformed sufficiently and has been filled with seam Gap, now equipment carry cable connector end and complete sealing using mechanical seal principle；

Step 8.19, with special locking pliers the turret head on cable end sea support is clamped, mixed using torque spanner Thick-billed crow head, fastens hex nut, and hex nut and stainless steel hold-down ring progressively push ahead copper sealing ring, and then copper sealing ring exists Expanded between sealing device cylinder inner wall, cable seal support and stainless steel hold-down ring three in the presence of common pressure, torque When value reaches setting value, copper sealing ring has been deformed sufficiently and has been filled with gap, and now cable connector end is close using machinery Envelope principle completes sealing.

Preferably, the tooth grinding of the one side of the square file geared cable in the step 2.5 sells out and polished flat.

Preferably, described cleaning enter all cables in junction box, clean all end joining tools, clean out copper powder, it is clear The foreign matter of clean triangle copper line surface is managed, postwelding surface is cleaned, clears up special leak test device, and the leak detection on cable Liquid, the black carbon powder cleaned up on inner insulating layer, cleaning heap outer core probing measurement equipment carry cable connector, clean out cable Cleaning solution needed for the grease at each position of sealed support is isopropanol.

Preferably, described special phenolic resin clip includes clip body, and clip body is shaped as V-structure, V It is circular arc knot to be provided with the inside of the bending part of the clip body of type structure on the outside of shrinkage pool, the bending part of the clip body of V-structure Structure.

Preferably, described special leak test device includes that two-part Test section can be taken into apart, and experiment is originally Pipe clamp, pipe joint of the Test section provided with connection aerating device, Test section and sealed support phase are cased with the outside of body Match somebody with somebody.

Preferably, described step 6.3, with aid, 1.5 inches are inwardly measured from cable socket, cutter edge is used Circumference draws oversheath, divests oversheath；Step 6.4, with aid, outwards measure 19/32 inch, excision from oversheath port External shield；Step 6.5, with aid, 19/32 inch is inwardly measured from cable socket, prints and marks；Step 6.13, use Aid, 3/16 inch is inwardly measured from cable end, inner insulating layer is divested.

Preferably, described aid includes body, and the two ends of body are respectively equipped with female corresponding end and public plug Corresponding end, body is marked with divests or cuts sheath, each size of shielding on cable.

Preferably, described electric iron special includes soldering-iron mouth, and soldering-iron mouth is made up of two half parts that can separate closure, Two half parts of soldering-iron mouth connect two iron yokes respectively, and soldering-iron mouth and iron yoke are built-in with coil, each iron yoke and be respectively connected with Handle is provided with behind fin, fin, handle is connected with cable and plug.

Preferably, described special locking pliers includes the half hexagonal socket nut jaw two interconnections together, half It is cased with anti-shedding motion on the outside of hexagonal socket nut jaw, the rear ends of two and half hexagonal socket nut jaws is connected handle respectively And flexible handle, the rear end of fixed handle adjusts jackscrew provided with jaw, after the half hexagonal socket nut jaw for connecting flexible handle The middle connection that end passes through tension spring and fixed handle.

Preferably, described special pressing tongs includes Trinitarian mould, and Trinitarian mould is provided with center conductor Be fixed with framework and underframe on the outside of pressing tongs, inner shield pressing tongs, external shield pressing tongs, Trinitarian mould, upper framework and It is fixedly connected between underframe by pin with spring catch, the bottom of Trinitarian mould and one end of piston are connected, piston The other end connected through one end of underframe and kinematic pair, the other end of kinematic pair is connected between two handles, two handles Provided with ratchet.

Instant invention overcomes the low defect of conventional nuclear power station coaxial cable one-time success rate, in the first heap in the AP1000 whole world Three nuclear power stations are by checking, and one-time success rate reached 100%, can save many materials and manpower, and its technique Advance makes joint, and performance is more stable, safer in operation, can make out-pile Nuclear measurement system TCH test channel high temperature, high humidity, Use 60 years, used 20 years nuclear power station like product than ever more under the harsh and unforgiving environments of height irradiation.The technical process of the present invention is thin Cause in a subtle way, to fill the domestic gaps, training materials is provided for follow-up AP1000 nuclear power stations out-pile nuclear measurement system coaxial cable termination And task instruction.

Brief description of the drawings

Fig. 1 is four coaxial cable structure schematic diagrames；

Fig. 2 is that four coaxial cables expose spiral copper armour schematic diagram；

Fig. 3 is prepackage cable seal support schematic diagram；

Fig. 4 is a weld through and wound triangle copper cash schematic diagram；

Fig. 5 is cable seal support positioning figure；

Fig. 6 is three shaft coupling group parts schematic diagrames；

Fig. 7 is three coaxial casing assembly prepackage schematic diagrames；

Fig. 8 is to divest triaxial cable oversheath scale diagrams；

Fig. 9 is to divest triaxial cable external shielding layer scale diagrams；

Figure 10 is to choose out triaxial cable external shielding layer scale diagrams；

Figure 11 is prepackage triaxial cable joint inner ring schematic diagram；

Figure 12 is to divest ring schematic diagram in the middle of external insulation layer and prepackage triaxial cable joint；

Figure 13 is to expose center conductor dimensions schematic diagram；

Figure 14 is crimping center conductor position view；

Figure 15 is inner housing component scheme of installation；

Figure 16 is crimping inner housing component schematic diagram；

Figure 17 is to install casing assembly schematic diagram；

Figure 18 is crimping shell component diagram；

Figure 19 is the dimensional gaughing schematic diagram after the completion of triaxial cable joint；

Figure 20 is sealing device group parts schematic diagram；

Figure 21 is that equipment carries cable connector schematic diagram；

Figure 22 is sealing device prepackage schematic diagram；

Figure 23 is tri-coaxial head grafting schematic diagram；

Figure 24 is dimensional gaughing schematic diagram after tri-coaxial head grafting；

Figure 25 is ageing-resistant grease coating location schematic diagram；

Figure 26 is sealing device positioning schematic diagram；

Figure 27 is that equipment carries tip side sealing schematic diagram；

Figure 28 is cable end sea schematic diagram；

Figure 29 is electric iron special schematic diagram；

Figure 30 is aid schematic diagram；

Figure 31 is the schematic diagram of special locking pliers；

Figure 32 a are the schematic diagrames of special pressing tongs；

Figure 32 b are Figure 32 a side views；

Figure 33 is the schematic diagram of special phenolic resin clip；

Figure 34 a are the schematic diagrames of special leak test device；

Figure 34 b are Figure 34 a cut-away diagrams；

Figure 35 is that a kind of four coaxial cables of mechanical seal terminate the flow chart of technique.

Embodiment

To become apparent the present invention, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.

The present invention is a kind of four coaxial cable termination techniques of mechanical seal, AP1000 nuclear power station out-pile nuclear measurement systems (NIS), as shown in figure 35, it comprises the following steps：

Step 1, termination prepare, and have the following aspects：

Above-mentioned steps 1.2 start after the cold examination of unit, and at this moment making scene does not influence the operation of environment, and The evaporating, emitting, dripping or leaking of liquid or gas phenomenon of various pipelines has prevented substantially；

Step 1.3, making ease of Use platform, and a bench vice is clamped on operation edge of table or suspension column, in case in behaviour Make to make end on platform；

Step 1.4, cleaning junction box, make free from dust and debris in case；

Step 1.5, put on clean surgical glove, whole termination process, termination workman will with clean surgical glove, And to be replaced as often as possible；

Step 1.6, dip in calico isopropanol and clean into all cables in junction box；Adhered to during thorough cleaning cable laying Grease, dust and other impurities, it is only accurate to use isopropanol cleaning cable；

Step 1.7, dip in isopropanol with calico and clean all end joining tools, it is ensured that there is no debris on instrument；

Step 1.8, it is familiar with four coaxial cable structures, four coaxial cables are mainly each by center conductor, inner shield, external shield Layer between insulation also have outside one helical layer copper armour protective case composition, as shown in figure 1, the structure of four coaxial cables from inside to outside according to It is secondary including center conductor 1-1, inner insulating layer 1-2, external insulation layer 1-3, inner shield 1-4, first layer sheath 1-5, external shield 1-6, Second layer sheath 1-7, spiral copper armour 1-8, oversheath 1-9；

Whole termination process, participating in termination workman will be with clean surgical glove, and manufacturing process ensures that cleaning is guarantee FS final spice passes through various electric performance tests and the key element of joint safe and stable operation performance；

Step 2, the processing of spiral copper armour shell, as shown in Fig. 2 comprising the following steps：

Step 2.1, the fire-retardant oversheath for divesting cable copper armour：Take measurements, printed at 11 inches of cable end, and Oversheath is shelled, exposes the helical form copper armour for hermetically-sealed cable, oversheath is preserved with standby；

Step 2.2, the cleaning of copper armour：With hairbrush and the copper armour that exposes of grinding pad cleaning, cleaning direction will circumferentially, The cut of long axis direction should not be reduced along long axis direction；

Step 2.3, inspection copper armour, if having damage in the range of cable end 4.8 inches (12.2cm), it is necessary to cut Fall to restart；

Step 2.4, triangle hack-file is used, along the circumferential direction cut copper armour, the length that copper armour is cut away is 5.75 inches (14.6cm), exposes triaxial cable；

Step 2.5, burr and overlap with square file repairing copper armour port；Before use, the one side of square file geared cable Tooth grinding sells out and polished flat in order to avoid making triaxial cable oversheath be damaged by rasion；

Step 2.6, using nipper plier, copper armour port is modified into the bell shape of outward flanging, in order to avoid wedge angle is hurt Cable；

Step 2.7, with clean calico and isopropanol, clean out the debris such as copper powder；

Step 2.8, correction copper armour, make the copper armour exposed try one's best straight；

Step 3, welded seal support, comprise the following steps：

Step 3.1, the assemble sequence for checking each part of sealed support, i.e. stainless steel locking nut, stainless steel hold-down ring, copper The assemble sequence of sealing ring, as shown in figure 3, sealed support includes rack body 3-1, rack body 3-1 bottom is copper coin post Body, rack body 3-1 is provided with stainless steel locking nut 3-2, stainless steel hold-down ring 3-3, copper sealing ring 3-4, and stainless steel is compressed Ring 3-3 is located between copper sealing ring 3-4 and stainless steel locking nut 3-2.

Step 3.2, sealed support packed into cable, be placed on a temporary position；

Step 3.3, inspection electric iron special, as shown in figure 29, clear up the dirt and residual oxide of Electric iron nozzle；With white Cloth and isopropanol clear up loose debris, if soldering-iron mouth severe oxidation, can be cleaned with grinding pad；

Step 3.5, pressure regulator switch on power preheating electric iron special, and adjustment pressure regulator is until tip temperature stabilization is 290 DEG C ± 20 DEG C, the surface temperature for the electric iron that digital display thermometer is shown should be 350 DEG C；

Step 3.6, the triangle copper cash for preparing 6.5 inches of (161cm) length, the oxidation of clean surface is removed with grinding pad Layer；

Step 3.7, the foreign matter that isopropanol cleans out triangle copper line surface is dipped in calico；

Step 3.8, in 1.0 inches (2.5cm) apart from copper armour end 3-6 to 1.2 inches of (3.0cm) places triangle copper cash 3-5 one end is put into the helicla flute of copper armour, as shown in Figure 4；

Step 3.9, the electric iron with 200W and pure tin welding wire spot welding triangle copper cash end, about 1/2 inch of spot welding length (13mm),

Step 3.10, with file unnecessary weldering meat is repaired, can be smooth with file rasion；

Step 3.11, clip triangle copper cash with nipper plier and rotated along copper armour helicla flute to cable termination, filling copper armour Helicla flute, triangle copper cash terminal is apart from 1/8 inch of copper armour end (3mm)；

Step 3.12, with special phenolic resin clip, as shown in figure 33, clamp the bronze cylinders of sealed support, make close Envelope support rotates along copper armour helicla flute to cable termination direction, finally makes the end of sealed support bronze cylinders and the end of copper armour The distance between portion is 0.1~0.12 inch (2.5~3.0cm), as shown in figure 5, position A is spot welding position；

Special phenolic resin clip includes clip body 33-1, and clip body 33-1's is shaped as V-structure, V-type knot It is provided with the inside of the clip body 33-1 of structure bending part on the outside of shrinkage pool 33-2, the clip body 33-1 of V-structure bending part and is Arc-shaped structure 33-3.

Step 3.14, the stainless steel hex nut unscrewed on sealed support, about 12~15 are slided to four coaxial cable directions Inch (30~38cm), it is interim to place, 1.5 inches (3.8cm) oversheath reserved in advance is cut, being washed into two halves, to be enclosed on four coaxial Stainless steel hex nut is blocked on cable does not make it slide too remote inconvenience protection；

Step 3.15, phenolic resin clip is held on the other hand, cable is held on the other hand, cable and sealed support together erect Come, cable is clamped with the clamp base vise on operating desk, the jaw of bench vice will pad clean calico in advance, in order to avoid crush electricity Cable；

Step 3.18, the solder stick for cutting 24 inches (61cm) are standby；(22 inches can also be cut.)

Step 3.20, the circle for the electric iron special for being preheating to assigned temperature (display 350 DEG C) in advance being clipped in sealed support On cylinder,

Step 3.21, wait about 1 minute, when scaling powder is smoldered, immediately begin to filler wire and scaling powder, circumferentially turn Dynamic 360 °, solder stick is probably used up 18 inches (46cm), removes electric iron, is careful not to scolding tin to trickle to the outer of sealed support On surface, welding gimmick will be trained skillfully, shorten weld interval as far as possible, in order to avoid damage triaxial cable；

Step 3.23, pull out three cotton swabs；

The oversheath that step 3.24, extraction are filled in；

Step 3.25, with clean calico isopropanol postwelding surface is cleaned, remove welding slag and splashing；

Step 4, postwelding visual examination：Triaxial cable oversheath is checked, without obvious deformation and should be scalded, some expectations In discoloration or stain be acceptable, in the event of serious damage, it is necessary to terminated again at the beginning from step；

Step 5, leak test：

Step 5.1, with special leak test device, as shown in Figure 34 a, Figure 34 b, two halves are buckled togather, one end button On sealed support 34-6 bronze cylinders, the other end is buckled on copper armour, and note is taken away behind the position of copper armour one end；

Special leak test device includes that two-part Test section 34-4 can be taken into apart, and Test section 34-4's is outer Side is cased with pipe clamp 34-2, Test section 34-4 the pipe joint 34-3 provided with connection aerating device, Test section 34-4 with it is close Envelope support 34-6 matches.

Step 5.2, the enough electric adhesive tape 34-5 sealings of use winding at the gap of copper armour and leak test device；

Step 5.3, the stainless steel tube clamp 34-2 of two sets of leakage detection apparatus slipped over sealed support, it is interim to place；

Step 5.6, two stainless steel tube clamps are inserted in again；

Step 5.7,4 stainless steel tube clamps being inserted in the fastening of " one " word screwdriver, make two of leak test device Divide and tighten together；

Step 5.8, aerating device and leak test device linked together；

Step 5.9, the regulating valve of opening nitrogen cylinder are inflated into storage tank, until the pressure gauge installed in such as storage tank shows Show 20Psig (138kPa), close the regulating valve of nitrogen cylinder, stop inflation；

Step 5.10, the valve of opening storage tank are inflated to leak test device, if the pressure gauge of storage tank is in a slight decrease, The slow regulating valve for opening nitrogen cylinder makes the pressure gauge reading of storage tank recover 20Psig (138kPa) again, closes regulating valve；

Step 5.11, the weld seam between copper armour and the bronze cylinders of sealed support smear leak detection liquid 34-1；

Step 5.12, visual observations, if without generation bubble in 5 minutes, then it is assumed that welding is qualified；Step Rapid 5.13, if it is observed that there is bubble generation, then it is underproof to illustrate welding, it is necessary to heated again with electric iron special, volume 2~4 inches of (5~10cm) welding wires of outer increase and appropriate scaling powder weld the leak source for carrying out repair welding weld seam again；Seal again Experiment, untill qualified；

Step 5.14,4 pipe clamps of release, take away leak test device；

Step 5.15, take down electric adhesive tape；

Step 5.16, the leak detection liquid cleaned out with calico and isopropanol on leak test device and cable；

Step 6, triaxial cable joint make, and comprise the following steps：

(as shown in fig. 6, triaxial cable joint includes conductor contact pin 6-1, inner housing component 6-2, middle ring 6-3, inner ring 6- 4th, casing assembly 6-5.)

Step 6.2, casing assembly is put, be placed on temporary position, as shown in Figure 7；

Step 6.3, with aid (as shown in figure 30), 1.5 inches are inwardly measured from cable socket, with cutter along circle Week draws oversheath, is careful not to draw on earth, divests oversheath, as shown in Figure 8；A positioning stop is fixed on blade of carving knife to be made outside The depth of cut of sheath is just to avoid external shield under oversheath injured；

Step 6.4, with aid (as shown in figure 30), outwards measure 19/32 inch from oversheath port, cut off external screen Cover, as shown in Figure 9；

Step 6.5, with aid (as shown in figure 30), 19/32 inch is inwardly measured from cable socket, prints to do and remembers Number；

Step 6.6, with scriber, shielding line is outwards dug and gently smoothes out with the fingers straight over choosing, and is not make line as shown in Figure 10 Device injures cable insulation 10-1, and scriber is usedCopper arc welding electrode make, end is modified into taper and head rounding, Each external shield will choose inside-out when using, in order to avoid injure cable insulation；

Step 6.7, set upper inner ring, as shown in figure 11, make inner ring be close to the root of external shield line and oversheath, inner ring breach 11-1 is outside；

Ring in the middle of step 6.10, set, is placed, as shown in figure 12 with inner ring close to interim；

Step 6.12, dip in calico isopropanol and clean up black carbon powder on inner insulating layer；

Step 6.13, with aid (as shown in figure 30), 3/16 inch is inwardly measured from cable end, interior insulation is divested Layer；

Step 6.14, semiconductor layer is divested, expose center conductor, as shown in figure 13；

Step 6.16, the special pressing tongs of taking-up, as shown in figure 32, grasp, ratchet is fully discharged, mould is beaten completely Open；

Step 6.17, opening center contact pin packaging, selection silver color contact pin 14-2 insertion center conductors, make center contact pin afterbody Tightly against interior insulation, pressing tongs positioning is put into, as shown in figure 14, the back porch 14-5 of center contact pin abuts against pressing mold 14-4 back On, the U-type groove 14-3 of contact pin, which is put on " CC " positioning of pressing tongs, groove contact pin 14-2, contact pin neck 14-1；

Step 6.18, keep cable and contact pin in line, contact pin is close to cable, holds pressing tongs, make two handles to Close up together, no longer put forth effort until feeling, ratchet is fully discharged this moment, and jaw can be opened completely, contact pin crimping is finished；

Step 6.20, by aid 15-1 (as shown in figure 30), corresponding end insertion inner housing component 6-2；

Step 6.21, the contact pin that has crimped inserted inner housing component 6-2, confirms that contact pin is engaged with inner housing component 6-2 firm, As shown in figure 15；

Step 6.24, the special pressing tongs of taking-up, as shown in figure 32, grasp, ratchet is fully discharged, mould is beaten completely Open；

Step 6.25, cable and inner housing component be put into pressing tongs positioning, as shown in figure 16, the crop of pressing tongs is close to pressing tongs " inner shield locating slot " pressing mold falls on middle ring,

Step 6.26, cable of holding with a firm grip make cable remain vertical with pressing tongs, hold pressing tongs, make two handles to closing together Hold together, no longer put forth effort until feeling, ratchet is fully discharged this moment, and jaw can be opened completely, inner housing component (inner shield) crimping Finish,

Step 6.28, the inner housing component crimped by aid (as shown in figure 30), corresponding end insertion,

Step 6.29, slide casing assembly, until be interlocked with the jump ring connector of inner housing component, to hear or Feel " clicker " once, feel that very " refreshing " is defined, as shown in figure 17；

Step 6.30, the special pressing tongs of taking-up, as shown in figure 32, grasp, ratchet is fully discharged, mould is beaten completely Open, extract latch, break the train wheel bridge of pressing tongs into two with one's hands, open jaw, cable and casing assembly are put into the external shield hexagonal of pressing tongs Positioning hole, closes train wheel bridge, closes jaw, plugs latch, as shown in figure 18, " O " type ring crop of casing assembly leans against pressure The back side of mould；

In line, pressing tongs handle of holding with a firm grip holds pressing tongs, makes two handles for step 6.31, holding cable and casing assembly To closing up together, no longer put forth effort until feeling, ratchet is fully discharged this moment, and jaw can be opened completely, extract latch, break The train wheel bridge of pressing tongs is opened, jaw is opened, cable and casing assembly are taken out pressing tongs, first of impression pressure of casing assembly (external shield) Connect and finish；

Step 6.32, the external shield hexagonal positioning hole for cable and casing assembly being put into pressing tongs, close train wheel bridge, closure pincers Mouthful, latch is plugged, as shown in figure 18, afterbody " O " type ring of casing assembly is leaned against before pressing mold；

In line, pressing tongs handle of holding with a firm grip holds pressing tongs, makes two handles for step 6.33, holding cable and casing assembly To closing up together, no longer put forth effort until feeling, ratchet is fully discharged this moment, and jaw can be opened completely, extract latch, break The train wheel bridge of pressing tongs is opened, jaw is opened, cable and casing assembly are taken out pressing tongs, casing assembly (external shield) second impression pressure Connect and finish；

Dimensional gaughing after step 7, the completion of triaxial cable joint：After triaxial cable joint completes, outside joint Shell afterbody and the clear distance of copper armour end should be 3.13 " (7.95em), as shown in figure 19；

Step 8, sealing device are installed：

Step 8.1, inspection sealing each parts assemble sequence of the device and assembly orientation are correct, as shown in figure 20, Swagelok hex nuts 20-1, rear copper sealing ring 20-2, preceding copper sealing ring 20-3, sealing device 20-4 connect successively from left to right Connect；

Step 8.2, clean heap outer core probing measurement equipment with calico and isopropanol and carry cable connector, as shown in figure 21；

Step 8.3, make sealing device open tube end inwards, slided on four coaxial cables that termination is completed, cross cable Sealed support, as shown in figure 22；

Step 8.5, coupling nut 23-2 is fastened with thumb and forefinger, then enclosed with palm grip coupling nut rotation 1/4, noted Meaning should not rotate joint body, as shown in figure 23, and coupling nut 23-2 both sides are coaxial public for three coaxial female 23-1 and three Head 23-3；

The distance of step 8.6, measurement sealed support head end and device junction tail end should be 10.5-10.0 inches of (26.7- 25.4cm), as shown in figure 24；

1-1/2 " the hex nuts of step 8.7, releasable joint sealing device；

Step 8.8, slip 1-1/2 " hex nuts cross equipment and carry cable connector together with two copper sealing rings；

Step 8.11, with calico and isopropanol the debris such as the grease at each position of cable seal support are cleaned out；

Step 8.12, a thin layer of oxidation-inhibited grease is coated on the screw thread of cable seal support, in order to smooth Sealing, as shown in figure 25；

Step 8.14, the pipe of sealing device slided to the positioning of four coaxial cables, as shown in figure 26, last cable seal branch The sealing copper ring of frame exposes at least 1/16 inch (1.6mm), and the joint sealing device end of thread should be in equipment from the middle part of belt lacing Apart from end 0.75-1.3 inches of (19-33mm) place；

Step 8.16, careful slip hex nut are simultaneously screwed to the sealing device end of thread, tighten by hand hex nut, hexagonal spiral shell Mother should be 0.25-0.75 inches (6.4-19mm) apart from device junction end, as shown in figure 27；

Step 8.17, with 1-3/8 inches of stiff hands or biasing spanner clamp 1-3/8 on device junction end sealing device Inch hexagonal screw head；

Step 8.18, the thick-billed crow head for mixing using torque spanner 1-1/2 inches, the Swagelok six of 1-1/2 inches of fastening In angle nut, torque spanner setting value 125ft-lbf [170m-N], fastener cycle, Swagelok hex nuts are progressively pushed away forward Enter and seal copper ring, then seal copper ring and carry cable connector and Swagelok hex nuts in sealing device cylinder inner wall, equipment Expanded between three in the presence of common pressure, when moment values reach setting value, sealing copper ring has been deformed sufficiently and has been filled with Gap, now equipment carry cable connector end and complete sealing using mechanical seal principle；

Step 8.19, the turret head clamped with special locking pliers (as shown in figure 31) on cable end sea support, are used Torque spanner mixes 1-1/8 inches of thick-billed crow head, the hex nut of 1-1/8 inches of fastening, torque spanner setting value 85ft-1bf [115m-N], 1-1/8 inches of hex nut and stainless steel hold-down ring progressively push ahead copper sealing ring, and then copper sealing ring exists Expanded between sealing device cylinder inner wall, cable seal support and stainless steel hold-down ring three in the presence of common pressure, torque When value reaches setting value, copper sealing ring has been deformed sufficiently and has been filled with gap, and now cable connector end is close using machinery Envelope principle completes sealing, as shown in figure 28.

As shown in figure 29, electric iron special includes soldering-iron mouth 29-1, and soldering-iron mouth 29-1 is made up of two halves, simultaneously pre- for clamping Heat seal support；Soldering-iron mouth 29-1 two halves connect two iron yoke 29-2 respectively, and soldering-iron mouth 29-1 and iron yoke 29-2 are built-in with 500W/220V coil, for electrified regulation；Each iron yoke 29-2 is respectively connected with fin 29-3, and postwelding is easy to accelerate to cool； First handle 29-4 is provided with behind fin 29-3, first handle 29-4 is connected with cable and plug 29-5.In the past during welding, Electric iron is local preheating's metal, and frequently to move electric iron, can frequently result in rosin joint, the advantage sealing of the Special iron The bronze cylinders of support are surrounded by soldering-iron mouth completely, are heated evenly sealed support, and without mobile electric iron, only mobile weldering Silk, makes welding quality and efficiency all be significantly improved.

As shown in figure 30, aid includes body 30-3, and body 30-3 two ends are respectively equipped with female corresponding end 30- 1 and public plug corresponding end 30-2, female corresponding end 30-1 and public plug corresponding end 30-2 may be inserted into inner housing component, can make Inside and outside shell group component is closely close to when mounted, and especially advanced technology is, it is necessary to divest or cut on cable than ever Each size of sheath, shielding etc. is all marked on the body 30-3 of aid, is convenient for measuring, it is not easy to malfunction, is improved one Secondary qualification rate.

As shown in figure 31, special locking pliers is that common locking pliers is transformed, in two jaws of common locking pliers Half hexagonal socket nut in interior each welding, forms half hexagonal socket nut jaw 31-1.Half hexagonal socket nut jaw 31-1 outside It is cased with anti-shedding motion 31-5, two and half hexagonal socket nut jaw 31-1 rear end is connected handle 31-2 and movable hand respectively Handle 31-3, fixed handle 31-2 rear end adjust jackscrew 31-6, connection flexible handle 31-3 half hexagonal socket nut provided with jaw Jaw 31-1 rear end in the middle of tension spring 31-4 and fixed handle 31-2 by connecting.

In use, taking down anti-shedding motion 31-5, fixed handle 31-2 and flexible handle 31-3 clamp half hexagonal socket nut Mouth 31-1 is opened, and the hex nut on cable seal support is then clamped with half hexagonal socket nut jaw 31-1, fixed hand is moved Handle 31-2 and flexible handle 31-3 close half hexagonal socket nut jaw 31-1, and adjustment jaw adjustment jackscrew 31-6 is so that six in half Angle nut jaw 31-1 is tightly stung together, is returned and is filled anti-shedding motion 31-5.

The advantage of special locking pliers is to instead of general open-end wrench, due to sealing device requirement moment values compared with Greatly, stainless steel hex nut material and on sealed support is by relatively relatively soft, and general open-end wrench is in larger moment loading Under can produce slip and deform hex nut, make each angle rounding, it is impossible to which torque is beaten in continuation, and torque can not reach setting, connect Head must be reformed；And it is complete with hex nut on sealed support after the half hexagonal socket nut jaw 31-1 of this locking pliers closures completely It is complete to coincide, it is ensured that hex nut will not produce slip between jaw and produce deformation, and additional processing is configured with anti-shedding motion and entered One step ensure that jaw will not open, and substantially avoid the shortcoming of general open-end wrench.

As shown in figure 32, special pressing tongs includes Trinitarian mould 32-4, during Trinitarian mould 32-4 is provided with Heart conductor pressing tongs 32-1, inner shield pressing tongs 32-2, it is fixed with the outside of external shield pressing tongs 32-3, Trinitarian mould 32-4 Framework 32-5 and underframe 32-7, pin 32-10 and spring catch 32-11 are the framework 32-5 and underframe 32-7 in fixation, Trinitarian mould 32-4 bottom is connected with piston 32-6 one end, and piston 32-6 is used for applying pressure to complete to mould Crimping, the piston 32-6 other end is connected through underframe 32-7 with kinematic pair 32-8 one end, the kinematic pair 32-8 other end Connect and ratchet 32-9 is provided between two second handles 32-12, two second handle 32-12, with holding tight two the during crimping Two handle 32-12 make kinematic pair 32-8 promote piston 32-6 motions, and ratchet 32-9 effect is balanced strength, and pressing tongs is closed completely When jaw can be made to open completely by stopping means, will not occur exertin damage pressing tongs situation.

Special pressing tongs in the present invention the center conductor pressing tongs 32-1 of crimping triaxial cable, inner shield pressing tongs 32-2, External shield pressing tongs 32-3 synthesizes the Trinity, and to use three pressing tongs in the past, therefore the pressing tongs biggest advantage is maintenance rate 50% is reduced, once unqualified probability reduces also therefore than ever 50%.

Claims

1. four coaxial cable termination techniques of a kind of mechanical seal, it is characterised in that comprise the following steps：

Step 1, termination prepare, and have the following aspects：

Step 1.3, making ease of Use platform, make end on operating desk；

Step 1.4, cleaning junction box, make free from dust and debris in case；Cleaning enters all cables in junction box；Clean all ends Bonding tool；

Step 2.1, the fire-retardant oversheath for divesting cable copper armour；

Step 2.2, the cleaning of copper armour；

Whether step 2.3, inspection copper armour damage；

Step 2.5, burr and overlap with square file repairing copper armour port；

Step 2.7, clean out copper powder；

Step 2.8, correction copper armour；

Step 3, welding cable sealed support, comprise the following steps：

Step 3.1, the assemble sequence for checking each part of sealed support；

Step 3.2, sealed support packed into cable；

Step 3.4, the socket for two plugs of electric iron being all inserted into pressure regulator, connect thermocouple and digital display thermometer monitoring electricity is ironed Iron temperature；

Step 3.7, the foreign matter for cleaning out triangle copper line surface；

Step 3.11, clip triangle copper cash with nipper plier and rotated along copper armour helicla flute to cable termination, fill the spiral of copper armour Groove；

Step 3.12, with special phenolic resin clip, clamp the bronze cylinders of sealed support, make sealed support along copper armour spiral shell Spin slot rotates to cable termination direction；

Step 3.14, the stainless steel hex nut unscrewed on sealed support, cut oversheath reserved in advance, are washed into two halves and are enclosed on Stainless steel hex nut is blocked on four coaxial cables；

Step 3.15, cable and sealed support erected together, cable, platform tiger are clamped with the clamp base vise on operating desk The jaw of pincers will pad clean calico in advance；

Step 3.17, three cotton swabs are taken, remove cotton swab head, plug is between the above-mentioned oversheath filled in and copper armour, three cotton swab edges Circumferencial direction is mutually 120 °；

Step 3.18, the solder stick for cutting 22~24 inches are standby；

Step 3.19, sucked and scaling powder and injected between copper armour outer surface and sealed support inner surface with small-sized medical syringe Gap；

Step 3.21, when scaling powder is smoldered, immediately begin to filler wire and scaling powder, circumferentially rotate 360 °, remove electricity iron Iron；

Step 3.23, pull out three cotton swabs；

The oversheath that step 3.24, extraction are filled in；

Step 3.25, cleaning postwelding surface, remove welding slag and splashing；

Step 4, postwelding visual examination：Triaxial cable oversheath is checked, in the event of serious damage, it is necessary to from step 1 Start to terminate again；

Step 5, leak test：

Step 5.1, it is buckled togather with special leak test device two halves, one end is buckled on the bronze cylinders of sealed support, The other end is buckled on copper armour, and note is taken away behind the position of copper armour one end；

Step 5.5, leak test device two halves are buckled together, one end is buckled on the bronze cylinders of sealed support, other end button On electric adhesive tape on copper armour；

Step 5.6, two stainless steel tube clamps are inserted in again；

Step 5.8, aerating device and leak test device linked together；

Step 5.9, the regulating valve of opening nitrogen cylinder are inflated into storage tank, are shown until installed in the pressure gauge of such as storage tank 20Psig, closes the regulating valve of nitrogen cylinder, stops inflation；

Step 5.10, the valve for opening storage tank if the pressure gauge of storage tank is in a slight decrease, then delay to the inflation of leak test device The slow regulating valve for opening nitrogen cylinder makes the pressure gauge reading of storage tank recover 20Psig, closes regulating valve；

Step 5.13, if it is observed that there is bubble generation, then it is underproof to illustrate welding, it is necessary to added again with electric iron special Heat, extra increase welding wire and appropriate scaling powder weld the leak source for carrying out repair welding weld seam again；Leakage test is done again, until qualified Untill；

Step 5.14,4 pipe clamps of release, take away leak test device；

Step 5.15, take down electric adhesive tape；

Leak detection liquid on step 5.16, cleaning leak test device and cable；

Step 6, triaxial cable joint make, and comprise the following steps：

Step 6.2, casing assembly is put, be placed on temporary position；

Step 6.4, in oversheath port outwards cut off external shield；

Step 6.5, inwardly print and mark in cable socket；

Step 6.12, the black carbon powder cleaned up on inner insulating layer；

Step 6.13, in cable end inwardly divest inner insulating layer；

Step 6.14, semiconductor layer is divested, expose center conductor；

Step 6.17, open center contact pin packaging, selection silver color contact pin insertion center conductor, make center contact pin afterbody tightly against Interior insulation, is put into pressing tongs positioning, and the back porch of center contact pin is abutted against on the back of pressing mold, and the U-type groove of contact pin is put into pressing tongs " CC " locating slot；

In line, contact pin is close to cable, holds pressing tongs, makes two handles to together for step 6.18, holding cable and contact pin Close up, no longer put forth effort until feeling, ratchet is fully discharged this moment, and jaw can be opened completely, contact pin crimping is finished,

Step 6.20, by aid, corresponding end insertion inner housing component；

Step 6.22, expansion inner shield line, cover the numb eye of inner housing component and are uniformly distributed, until the back porch of inner housing component, repair All inner shield litzendraht wires beyond inner housing component back porch are cut,

Ring top covers inner shield line to the back porch of inner housing component in the middle of step 6.23, slip, to trim before in clean exceed Between ring and inner housing component back porch interface inner shield line；

Step 6.25, cable and inner housing component be put into pressing tongs positioning, the crop of pressing tongs is pressed close to pressing tongs " inner shield locating slot " Mould falls on middle ring,

Step 6.26, cable of holding with a firm grip make cable remain vertical with pressing tongs, hold pressing tongs, make two handles to closing up together, No longer put forth effort until feeling, ratchet is fully discharged this moment, and jaw can be opened completely, inner housing component crimping is finished；

Step 6.30, the special pressing tongs of taking-up, grasp, ratchet is fully discharged, mould is opened completely, extract latch, break The train wheel bridge of pressing tongs is opened, jaw is opened, cable and casing assembly is put into the external shield hexagonal positioning hole of pressing tongs, closes folder Plate, closes jaw, plugs latch, " O " type ring crop of casing assembly leans against the back side of pressing mold；

In line, pressing tongs handle of holding with a firm grip holds pressing tongs, makes two handles to one for step 6.31, holding cable and casing assembly Rise and close up, no longer put forth effort until feeling, ratchet is fully discharged this moment, and jaw can be opened completely, extract latch, break pressure into two with one's hands The train wheel bridge of pincers, opens jaw, and cable and casing assembly are taken out pressing tongs, and first of impression crimping of casing assembly is finished；

Step 6.32, the external shield hexagonal positioning hole for cable and casing assembly being put into pressing tongs, close train wheel bridge, close jaw, Latch is plugged, afterbody " O " type ring of casing assembly is leaned against before pressing mold；

In line, pressing tongs handle of holding with a firm grip holds pressing tongs, makes two handles to one for step 6.33, holding cable and casing assembly Rise and close up, no longer put forth effort until feeling, ratchet is fully discharged this moment, and jaw can be opened completely, extract latch, break pressure into two with one's hands The train wheel bridge of pincers, opens jaw, and cable and casing assembly are taken out pressing tongs, and the crimping of casing assembly second impression is finished；

Step 6.34, for training test specimen, carry out 60 pounds of pull-out test, verify that workman undergoes training qualified with this, can authorize into The installation of the formal engineering of row；The joint of formal engineering is not subject to this pull-out test；

Dimensional gaughing after step 7, the completion of triaxial cable joint；

Step 8, sealing device are installed：

Step 8.3, make sealing device open tube end inwards, slided on four coaxial cables that termination is completed, cross cable seal Support；

The hex nut of step 8.7, releasable joint sealing device；

Step 8.11, the grease for cleaning out each position of cable seal support；

Step 8.18, mix thick-billed crow head using torque spanner, fasten in hex nut, fastener cycle, hex nut is progressively forward Promote sealing copper ring, then seal copper ring sealing device cylinder inner wall, equipment carry cable connector and hex nut three it Between expand in the presence of common pressure, when moment values reach setting value, sealing copper ring has been deformed sufficiently and has been filled with gap, this When equipment carry cable connector end and complete sealing using mechanical seal principle；

Step 8.19, with special locking pliers the turret head on cable end sea support is clamped, crow is mixed using torque spanner Head, fastens hex nut, and hex nut and stainless steel hold-down ring progressively push ahead copper sealing ring, and then copper sealing ring is in sealing Expanded between device cylinder inner wall, cable seal support and stainless steel hold-down ring three in the presence of common pressure, moment values reach During to setting value, copper sealing ring has been deformed sufficiently and has been filled with gap, and now cable connector end is former using mechanical seal Reason completes sealing.

2. a kind of four coaxial cable termination techniques of mechanical seal as claimed in claim 1, it is characterised in that the step The tooth grinding of the one side of square file geared cable in 2.5 sells out and polished flat.

3. a kind of four coaxial cable termination techniques of mechanical seal as claimed in claim 1, it is characterised in that it is described clean into Enter all cables in junction box, it is all end joining tools of cleaning, the foreign matter for cleaning out copper powder, cleaning out triangle copper line surface, clear Clean postwelding surface, the special leak test device of cleaning, and leak detection liquid on cable, the black carbon cleaned up on inner insulating layer Powder, cleaning heap outer core probing measurement equipment carry cable connector, cleaned out needed for the grease at each position of cable seal support Cleaning solution is isopropanol.

4. four coaxial cable termination techniques of a kind of mechanical seal as claimed in claim 1, it is characterised in that described is special Phenolic resin clip include clip body (33-1), clip body (33-1) is shaped as V-structure, the clip of V-structure It is provided with the inside of the bending part of body (33-1) on the outside of shrinkage pool (33-2), the bending part of the clip body (33-1) of V-structure as circle Arcuate structure (33-3).

5. four coaxial cable termination techniques of a kind of mechanical seal as claimed in claim 1, it is characterised in that described is special Leak test device include to take apart into and being cased with pipe on the outside of two-part Test section (34-4), Test section (34-4) Clip (34-2), Test section (34-4) provided with connection aerating device pipe joint (34-3), Test section (34-4) with it is close Envelope support (34-6) matches.

6. a kind of four coaxial cable termination techniques of mechanical seal as claimed in claim 1, it is characterised in that described step 6.3rd, with aid, 1.5 inches is inwardly measured from cable socket, oversheath is circumferentially drawn with cutter, oversheath is divested；Step Rapid 6.4, with aid, 19/32 inch is outwards measured from oversheath port, external shield is cut off；Step 6.5, with aid, 19/32 inch is inwardly measured from cable socket, prints and marks；Step 6.13, with aid, inwardly measured from cable end 3/16 inch, divest inner insulating layer.

7. a kind of four coaxial cable termination techniques of mechanical seal as claimed in claim 6, it is characterised in that described auxiliary Instrument includes body (30-3), and the two ends of body (30-3) are respectively equipped with female corresponding end (30-1) and public plug corresponding end (30-2), body (30-3) is marked with divests or cuts sheath, each size of shielding on cable.

8. four coaxial cable termination techniques of a kind of mechanical seal as claimed in claim 1, it is characterised in that described is special Electric iron includes soldering-iron mouth (29-1), and soldering-iron mouth (29-1) is made up of two half parts that can separate closure, soldering-iron mouth (29-1) Two half parts connect two iron yokes (29-2) respectively, soldering-iron mouth (29-1) and iron yoke (29-2) are built-in with coil, Mei Getie It is respectively connected with yoke (29-2) behind fin (29-3), fin (29-3) and is provided with first handle (29-4), first handle (29-4) is connected with cable and plug (29-5).

9. four coaxial cable termination techniques of a kind of mechanical seal as claimed in claim 1, it is characterised in that described is special Locking pliers include the half hexagonal socket nut jaw (31-1) two interconnections together, half hexagonal socket nut jaw (31-1) Outside be cased with anti-shedding motion (31-5), the rear ends of two and half hexagonal socket nut jaws (31-1) is connected handle respectively (31-2) and flexible handle (31-3), the rear end of fixed handle (31-2) connects movable hand provided with jaw adjustment jackscrew (31-6) The rear end of half hexagonal socket nut jaw (31-1) of handle (31-3) passes through in tension spring (31-4) and fixed handle (31-2) Between connect.

10. four coaxial cable termination techniques of a kind of mechanical seal as claimed in claim 1, it is characterised in that described is special With pressing tongs include Trinitarian mould (32-4), Trinitarian mould (32-4) provided with center conductor pressing tongs (32-1), Framework (32- is fixed with the outside of inner shield pressing tongs (32-2), external shield pressing tongs (32-3), Trinitarian mould (32-4) 5) with underframe (32-7), pin (32-10) and spring catch (32-11) are passed through between upper framework (32-5) and underframe (32-7) It is fixedly connected, the bottom of Trinitarian mould (32-4) is connected with one end of piston (32-6), the other end of piston (32-6) It is connected through underframe (32-7) with one end of kinematic pair (32-8), the other end of kinematic pair (32-8) connects two second handles Ratchet (32-9) is provided between (32-12), two second handles (32-12).