CN108871600A - A kind of armoured thermocouple device with cambered surface sealing structure - Google Patents

Abstract

The present invention relates to armoured thermocouple field, existing removable armoured thermocouple high voltage performance is generally bad, is easy to produce leakage.The present invention includes flange and several armoured thermocouples being adapted to the mounting hole with several mounting holes, the armoured thermocouple passes through the mounting hole correspondingly, the mounting hole is ladder-like variable diameter hole, the groove of inner concave arc surface is had at variable diameter for bottom, the hole wall of upper end large diameter hole opens up internal screw thread, the armoured thermocouple is equipped with one section of reinforced pipe being nested with, the reinforced pipe top is welded and fixed with the armoured thermocouple, the bottom end of the reinforced pipe is the seal head with evagination side and bottom cambered surface, the bottom cambered surface of the seal head is tightly attached on the inner concave arc surface of the groove.Reinforced pipe interference is placed on armoured thermocouple, does not generate relative movement, the bottom cambered surface of seal head and the inner concave arc surface of groove are close together and can make device good airproof performance, high pressure resistant.

Description

A kind of armoured thermocouple device with cambered surface sealing structure

Technical field

The invention belongs to armoured thermocouple technical fields, and in particular to a kind of armoured thermocouple with cambered surface sealing structure Device.

Background technique

Fixed bed residual hydrogenation equipment is due to can be realized residual oil with very strong adaptability to raw material and process flexibility Clean and effective utilizes, and high financial profit is the most residual oil processing unit of current petrochemical industry, fixed bed residual hydrogenation equipment Core process is reaction, its main feature is that operating pressure is high（Greater than 15Mpa）, temperature height（400 C）, reactor batch temperature measurement It is the key that residual hydrogenation reaction with control.Existing production process is to bed temperature Spreading requirements conduct monitoring at all levels.Reactor was both There are axial temperature differences there is radial temperature difference again, and temperature measuring point is more, and the bed temperature of reaction is more comprehensive, it is desirable to more measurements Point is to measure temperature.Since process throughput is increasing, device diameters are also increasing.One reactor is from top to bottom at least There are three above bed thermometrics, and 5,000,000 tons/year of residual hydrogenation equipment or even each layer have 24 temperature measuring points.One Tens temperature measuring points are filled on reactor, and hundred temperature measuring points are loaded on four reactors.Since reactor is that high temperature and pressure is held Device does not allow out too many flange hole, and common welded type Multi-point metal shielding thermo-electric is unable to satisfy requirement, and after operation if there is 1 point or 2 points damage, it is necessary to which armour tube capacity easily seeps hydrogen, welded seal weldering is also easy to produce weldering to whole replacement of products, and in use It is big to stitch hydrogen attack, welded seal installation difficulty.

In view of the above-mentioned problems, dismountable armoured thermocouple device comes into being, dismountable armoured thermocouple every Thermocouple can all remove, and the armoured thermocouple element of damage need to only be removed replacement by when maintenance, not need integral replacing, Ke Yijie It saves instrument and overhauls expense.But existing removable armoured thermocouple element is adopted from the flange that reactor is drawn out to high-pressure bottle It is directly sealed with high temperature filler, not only installation difficulty is big, and pressure resistance is slightly accidentally installed, will be produced there is also unstable Raw leakage, and cannot withstand using packing seal the pulling force of thermocouple temperature measurement end application, furthermore in reactor thermocouple with urge Agent coking is in blocks, blocking, and when reactor catalyst bed collapses sinking, the installation of TC bracket can be simultaneously in reactor Sink, thermocouple can at this time be drawn into reactor, generate serious leak.

Summary of the invention

The present invention aiming at the shortcomings in the prior art, provides one kind convenient for disassembly and assembly, good airproof performance, using reliable, high pressure resistant And dismountable armoured thermocouple device of thermocouple temperature measurement end pulling force can be born.

To achieve the above object, the present invention adopts the following technical scheme that：

A kind of armoured thermocouple device of high pressure resistance sealing structure, including with several mounting holes flange and several with it is described The armoured thermocouple of mounting hole adaptation, the armoured thermocouple pass through the mounting hole correspondingly, and the mounting hole is rank Scalariform variable diameter hole, the groove of inner concave arc surface is had at variable diameter for bottom, and the hole wall of upper end large diameter hole opens up internal screw thread, the armouring Thermocouple is equipped with one section of reinforced pipe being nested with, and the reinforced pipe top is welded and fixed with the armoured thermocouple, the reinforced pipe Bottom end be the seal head with evagination side and bottom cambered surface, the bottom cambered surface of the seal head is tightly attached to the interior of the groove On cancave cambered surface.Reinforced pipe interference is placed on armoured thermocouple, does not generate relative movement, the bottom cambered surface of seal head and groove Inner concave arc surface, which is close together, can make device good airproof performance, high pressure resistant.

Preferably, the outer convex of the seal head is successively cased with and compresses slip ring and the hollow pressure being adapted to the groove Tight bolt, the hold-down bolt, which is screwed into the groove, makes the compression slip ring hold out against the seal head, and hold-down bolt can phase Mobile to reinforced pipe, compression slip ring is hard metal, is shielded, and prevents hold-down bolt and seal head from generating mutually abrasion Using effect is influenced, seal head material is relatively soft, and the tight slip ring of groove bands dynamic pressure that hold-down bolt screws in flange to seal Head is gradually compacted, and the raised cambered surface of seal head and the inner concave arc surface of groove are close together and realize sealing, when the lower part of flange When having high pressure, so that compressing slip ring, firmly top tight sealing head is not leaked for the threaded connection of hold-down bolt and flange, when Armoured thermocouple and catalyst coking are in blocks, blocking when eventually leading to mounting bracket and having sinking tendency, armoured thermocouple by Interior pulling force effect suppresses integral and bottom portion of groove with armoured thermocouple due to reinforced pipe and forms blocking work to seal head With so that armoured thermocouple will not be drawn into reactor, and then leakage can be avoided result in.

Preferably, the upper end outer wall of the reinforced pipe opens up one section of connection screw thread, it is cased with therewith in the connection screw thread The upper surface of the bolt head of the hold-down bolt is close in the band internal thread support tube of adaptation, the bottom end of the support tube, branch Stay tube plays the role of support for hold-down bolt and the risk loosened occurs to reduce hold-down bolt, so that armouring is warm The high-voltage resistance capability of galvanic couple improves, and when armoured thermocouple and catalyst coking are in blocks, the blocking mounting bracket that eventually leads to has When sinking tendency, armoured thermocouple is stopped by inside pulling force effect since the bolt head of hold-down bolt forms support tube Effect, so that armoured thermocouple will not be drawn into reactor, and then can avoid result in leakage, device is safer.

Preferably, the flange faces hydrogen end face with a composite ceramic material layer, ceramic material layer can pass through smelting The method that gold combines is combined on flange, is prevented flange from facing hydrogen end plane metal material and is reacted with hydrogen, and that improves device can By property.

Preferably, the armoured thermocouple device further includes being sequentially connected to the flange top to form seal chamber Seal pipe, cable gland head and explosion-proof wiring box, the upper end of the seal pipe affixed one are symmetrical stair-stepping outer with conical cavity Convex sealing upper cover, the lower end of the explosion-proof wiring box are equipped with the explosion-proof bottom plate of indent being adapted to the sealing upper cover, the sealing Upper cover is inserted into the explosion-proof bottom plate, and sealing upper cover is made into symmetrical ladder-like can more easily be inserted into explosion-proof bottom plate.

Preferably, the cable gland head is inserted into from lower to upper and is close to the sealing upper cover and stretches out in the sealing End face is covered, the part that the cable gland head is contacted with the sealing upper cover is truncated cone-shaped, stretches out the sealing upper cover upper end The part in face is screwed cylindrical and is fixed with nut thread, is equipped between bottom flange and the sealing upper cover lower end surface Sealing ring, cable gland head middle part, which is made into truncated cone-shaped and connect with sealing upper cover, can make the sealing performance of seal pipe more preferable, sealing ring Also seal pipe sealing performance can be made more preferable with nut.

Preferably, raising upward to be formed with externally threaded boss, the armouring heat in the middle part of the upper surface of the flange Galvanic couple uniformly circumferentially passes through the boss along the boss upper surface, and it is close that the ring wall bottom of the boss is cased with the first expansion chuck Seal, ring wall top are cased with the second expansion chuck sealing ring, and the boss and the seal pipe are threadedly coupled, the seal pipe and institute The threaded connection place for stating boss is equipped with lock-screw, and the lock-screw is laterally screwed into the sealed tube wall and pushes against described convex Platform.Two expansion chuck sealing rings can make the better tightness of the threaded connection of seal pipe and flange.

Preferably, being equipped with multiple spot line bank in the explosion-proof wiring box, several Glans are worn in the cable gland head Head lead fills fixed insulant, the upper end of the gland head lead and institute between the gland head lead and the gland head The connection of multiple spot line bank is stated, fixed insulant can make to separate between gland head lead and insulate, and can be anchored on cable gland head Inner wall, bear high pressure.

Preferably, the armoured thermocouple includes casing and the thermoelectricity for being arranged in several mutually separated insulation in casing Thermo wires, casing use the alloy containing following weight percent composition to be made：≤ 0.15% C ,≤1.0% Si, 18- 22% Cr, 25-30% Ni, 1.8-2.2% Nb, 0.1-0.25% N, 0.10-0.15% Re, 2.0- 3.5% lv, Fe surplus, to improve the performance of anti-hydrogen embrittlement and hydrogen sulfide corrosion resistant, the other end of the gland head lead and institute It states and is connected with thermocouple lead between thermocouple wire, the gland head lead is connected with the thermocouple lead by binding post, The thermocouple lead is connected with the thermocouple wire by bundle pipes, the effective insulant padding and compacting blend compounds water of boundling Encapsulation guarantees that interior leakage does not occur for armoured thermocouple.

Preferably, valve opening is arranged in the seal pipe side wall, shut-off valve, pressure gauge and unloading valve are successively arranged outside valve opening.

The beneficial effects of the invention are as follows：Cambered surface groove is set on flange, reinforces bottom of the tube and cambered surface seal head, the two is set Tight fit is pressed into ball face sealing, and hold-down bolt can be such that reinforced pipe is bonded with flange, can increase voltage endurance capability and effectively It prevents armoured thermocouple from being drawn into reactor, leaks, armoured thermocouple and the reinforced pipe with raised seal head are pressed into Whole, housing hold-down bolt is threadedly coupled with flange, and realizes armoured thermocouple with the mode that support tube pushes against hold-down bolt Fixing seal, simple installation, good airproof performance, using reliable, high pressure resistant and can bear thermocouple temperature measurement end pulling force will not be let out Leakage, further, flange and seal pipe, seal pipe and explosion-proof wiring box are by improved structure, so that entirely temperature measuring equipment The voltage endurance capability of better tightness, system greatly improves（Single component pressure resistance reaches 180MPa）.

Detailed description of the invention

Fig. 1 is cross-sectional view of the invention.

Fig. 2 is the cross-sectional view of armoured thermocouple.

In figure, 1- flange；11- boss；The first sealing ring of 12-；The second sealing ring of 13-；2- armoured thermocouple；21- casing； 22- thermocouple wire；23- reinforced pipe；231- seal head；24- hold-down bolt；25- compresses slip ring；26- connection screw thread；27- branch Stay tube；28- bundle pipes；3- seal pipe；31- seals upper cover；32- shut-off valve 33- pressure gauge；34- unloading valve；4- cable Glan Head；41- gland head lead；5- explosion-proof wiring box；The explosion-proof bottom plate of 51-；52- multiple spot line bank；6- thermocouple lead；7- wiring Column.

Specific embodiment

Below with reference to the attached drawing of the invention embodiment, the technical solution of the invention embodiment is explained and Illustrate, but following embodiments are only the preferred embodiment of the invention, and not all.Based on the implementation example in the implementation mode, Those skilled in the art's other embodiments obtained without making creative work, belong to the invention Protection scope.

As shown in Fig. 1 to 2：A kind of armoured thermocouple device of high pressure resistance sealing structure, including having several mounting holes Flange 1 and several armoured thermocouples 2 being adapted to the mounting hole, the armoured thermocouple 2 pass through described correspondingly Mounting hole, the mounting hole are ladder-like variable diameter hole, have the groove of inner concave arc surface, the hole of upper end large diameter hole at variable diameter for bottom Wall opens up internal screw thread, and the armoured thermocouple 2 is equipped with one section of reinforced pipe 23 being nested with, 23 top of reinforced pipe and the armouring Thermocouple 2 is welded and fixed, and the bottom end of the reinforced pipe 23 is the seal head 231 with evagination side and bottom cambered surface, described close The bottom cambered surface of end socket 231 is tightly attached on the inner concave arc surface of the groove.Reinforced pipe 23 and armoured thermocouple 2 suppress it is integral, Relative movement is not generated, the bottom cambered surface of seal head and the inner concave arc surface of groove are close together and can make device good airproof performance, It is high pressure resistant.

The outer convex of the seal head 231, which is successively cased with, compresses slip ring 25 and the hollow compression spiral shell being adapted to the groove Bolt 24, the hold-down bolt 24, which is screwed into the groove, makes the compression slip ring 25 hold out against the seal head 231, hold-down bolt 24 It is clearance fit between reinforced pipe 23, compressions slip ring 25 is hard metal, is shielded, and hold-down bolt 24 and close is prevented End socket 231, which generates mutually abrasion, influences using effect, and 231 material of seal head is relatively soft, and hold-down bolt 24 screws in the recessed of flange 1 Slot drives compression slip ring 25 that seal head 231 is gradually compacted, the raised cambered surface of seal head 231 and the inner concave arc surface of groove Be close together realization sealing, and when high pressure is arranged at the lower part of flange 1, the threaded connection of hold-down bolt 24 and flange 1 is so that compress Firmly top tight sealing head 231 does not leak slip ring 25, when armoured thermocouple 2 and catalyst coking are in blocks, blocking final When mounting bracket being caused to have sinking tendency, armoured thermocouple 2 is by inside pulling force effect, due to reinforced pipe 23 and armouring thermoelectricity Even 2, which suppress integral and bottom portion of groove, forms barrier effect to seal head 231, so that armoured thermocouple 2 will not be drawn into instead Device is answered, and then leakage can be avoided result in.

The upper end outer wall of the reinforced pipe 23 opens up one section of connection screw thread 26, is cased in the connection screw thread 26 and is adapted to therewith Band internal thread support tube 27, the bottom end of the support tube 27 is close to the upper surface of the bolt head of the hold-down bolt 24, Support tube 27 plays the role of support for hold-down bolt 24 and the risk loosened occurs to reduce hold-down bolt 24, and then makes The high-voltage resistance capability of armoured thermocouple 2 improves, and when armoured thermocouple 2 and catalyst coking are in blocks, blocking eventually lead to When mounting bracket has sinking tendency, armoured thermocouple 2 is by inside pulling force effect, since the bolt head of hold-down bolt 24 is to branch Stay tube 27 forms barrier effect, so that armoured thermocouple 2 will not be drawn into reactor, and then can avoid result in leakage, device It is safer.The flange 1 faces hydrogen end face with a composite ceramic material layer, and ceramic material layer can pass through metallurgical bonding Method is combined on flange, is prevented flange 1 from facing hydrogen end plane metal material and is reacted with hydrogen, and making for the great component of device is improved Use life and reliability.Preferably, 2 device of armoured thermocouple further includes being sequentially connected to 1 top of the flange energy shape At the seal pipe 3, cable gland head 4 and explosion-proof wiring box 5 of seal chamber, the upper end affixed one of the seal pipe 3 is symmetrical ladder-like Evagination with conical cavity seal upper cover 31, the lower end of the explosion-proof wiring box 5 is equipped be adapted to the sealing upper cover 31 in Recessed explosion-proof bottom plate 51, the sealing upper cover 31 are inserted into the explosion-proof bottom plate 51, and sealing upper cover 31 is made into symmetrical ladder-like energy It is more easily inserted into explosion-proof bottom plate 51.

The cable gland head 4 is inserted into from lower to upper and is close to the sealing upper cover 31 and stretches out in the sealing upper cover 31 End face, the part that the cable gland head 4 is contacted with the sealing upper cover 31 is truncated cone-shaped, stretches out 31 upper end of sealing upper cover The part in face is screwed cylindrical and is fixed with nut thread, is set between bottom flange and 31 lower end surface of sealing upper cover There is sealing ring, truncated cone-shaped is made into the middle part of cable gland head 4 and is connect with sealing upper cover 31 can make the sealing performance of seal pipe 3 more preferable, Sealing ring and nut can also make 3 sealing performance of seal pipe more preferable.It raises upward to be formed with outer in the middle part of the upper surface of the flange 1 The boss 11 of screw thread, the armoured thermocouple 2 uniformly circumferentially passes through the boss 11 along 11 upper surface of boss, described convex The ring wall bottom of platform 11 is cased with the first expansion chuck sealing ring 12, is cased with the second expansion chuck sealing ring 13, the boss at the top of ring wall 11 and the seal pipe 3 be threadedly coupled, the threaded connection place of the seal pipe 3 and the boss 11 is equipped with lock-screw, described Lock-screw is laterally screwed into 3 wall of seal pipe and pushes against the boss 11.Two expansion chuck sealing rings can make seal pipe 3 and method The better tightness of the threaded connection of orchid 1.Multiple spot line bank 52 is equipped in the explosion-proof wiring box 5, in the cable gland head 4 Several gland head leads 41 are worn, fixed insulant, the Glan are filled between the gland head lead 41 and the gland head 4 The upper end of head lead 41 and the multiple spot line bank 52 connection, fixed insulant can make to separate between gland head lead 41 and absolutely Edge, and it can be anchored on the inner wall of cable gland head 4, bear high pressure.

The armoured thermocouple 2 includes casing 21 and the thermocouple wire for being arranged in several mutually separated insulation in casing 21 22, casing 21 is made of the alloy containing following weight percent composition：≤ 0.15% C ,≤1.0% Si, 18- 22% Cr, 25-30% Ni, 1.8-2.2% Nb, 0.1-0.25% N, 0.10-0.15% Re, 2.0- 3.5% lv, Fe surplus, to improve the performance of anti-hydrogen embrittlement and hydrogen sulfide corrosion resistant.The other end of the gland head lead 41 and Thermocouple lead 6 is connected between the thermocouple wire 22, the gland head lead 41 and the thermocouple lead 6 pass through wiring Column 7 connects, and the thermocouple lead 6 and the thermocouple wire 22 are connected by bundle pipes 28, and the bundle pipes 28 use insulant Padding and compacting blend compounds water seal dress guarantees that interior leakage does not occur for armoured thermocouple 2.3 side wall of seal pipe is arranged valve opening, outside valve opening It is successively arranged shut-off valve 32, pressure gauge 33 and unloading valve 34.

The above, the only specific embodiment of the invention, but the protection scope of the invention does not limit to In this, being familiar with the those skilled in the art should be understood that the invention includes but is not limited to attached drawing and specific embodiment party above Content described in formula.The modification of any function and structure principle without departing from the invention is intended to be included in claims Range in.

Claims (10)

1. a kind of armoured thermocouple device with cambered surface sealing structure, the flange including having several mounting holes（1）With it is several The armoured thermocouple that root is adapted to the mounting hole（2）, the armoured thermocouple（2）The mounting hole is passed through correspondingly, It is characterized in that, the mounting hole is ladder-like variable diameter hole, it is the groove with inner concave arc surface, the hole of upper end large diameter hole at variable diameter Wall opens up internal screw thread, the armoured thermocouple（2）The reinforced pipe being nested with equipped with one section（23）, the reinforced pipe（23）Top and institute State armoured thermocouple（2）It is welded and fixed, the reinforced pipe（23）Bottom end be the seal head with evagination side and bottom cambered surface （231）, the seal head（231）Bottom cambered surface be tightly attached on the inner concave arc surface of the groove.

2. a kind of armoured thermocouple device with cambered surface sealing structure as described in claim 1, which is characterized in that described close End socket（231）Outer convex is successively cased with compression slip ring（25）With the hollow hold-down bolt being adapted to the groove（24）, institute State hold-down bolt（24）Being screwed into the groove makes the compression slip ring（25）Hold out against the seal head（231）.

3. a kind of armoured thermocouple device with cambered surface sealing structure as described in claim 1, which is characterized in that described to add Qiang Guan（23）Upper end outer wall open up one section of connection screw thread（26）, the connection screw thread（26）On be cased be adapted to therewith with interior The support tube of screw thread（27）, the support tube（27）Bottom end be close to the hold-down bolt（24）Bolt head upper surface.

4. a kind of armoured thermocouple device with cambered surface sealing structure as described in claim 1, which is characterized in that the method It is blue（1）Face hydrogen end face with a composite ceramic material layer.

5. a kind of armoured thermocouple device with cambered surface sealing structure as described in claim 1, which is characterized in that the armour Fill thermocouple（2）Device further includes being sequentially connected to the flange（1）The seal pipe of seal chamber can be formed at top（3）, cable lattice Blue head（4）And explosion-proof wiring box（5）, the seal pipe（3）The symmetrical stair-stepping evagination with conical cavity in upper end affixed one it is close Seal up lid（31）, the explosion-proof wiring box（5）Lower end be equipped with and the sealing upper cover（31）The explosion-proof bottom plate of the indent of adaptation （51）, the sealing upper cover（31）It is inserted into the explosion-proof bottom plate（51）In.

6. a kind of armoured thermocouple device with cambered surface sealing structure as claimed in claim 5, which is characterized in that the electricity Cable gland head（4）It is inserted into from lower to upper and is close to the sealing upper cover（31）And stretch out the sealing upper cover（31）Upper surface, institute State cable gland head（4）With the sealing upper cover（31）The part of contact is truncated cone-shaped, stretches out the sealing upper cover（31）Upper end The part in face is screwed cylindrical and is fixed with nut thread, is equipped between bottom flange and the sealing upper cover lower end surface Sealing ring.

7. a kind of armoured thermocouple device with cambered surface sealing structure as described in claim 1, which is characterized in that the method It is blue（1）Upper surface in the middle part of raise upward to be formed with externally threaded boss（11）, the armoured thermocouple（2）Along the boss （11）Upper surface uniformly circumferentially passes through the boss（11）, the boss（11）Ring wall bottom be cased with the first expansion chuck sealing Circle（12）, ring wall top is cased with the second expansion chuck sealing ring（13）, the boss（11）With the seal pipe（3）It is threadedly coupled, The seal pipe（3）With the boss（11）Threaded connection place be equipped with lock-screw, the lock-screw is laterally screwed into described Seal pipe（3）Wall simultaneously pushes against the boss（11）.

8. a kind of armoured thermocouple device with cambered surface sealing structure as claimed in claim 5, which is characterized in that described anti- Quick-fried junction box（5）It is interior to be equipped with multiple spot line bank（52）, the cable gland head（4）Inside wear several gland head leads（41）, institute State gland head lead（41）With the gland head（4）Between fill fixed insulant, the gland head lead（41）Upper end and The multiple spot line bank（52）Connection.

9. a kind of armoured thermocouple device with cambered surface sealing structure as described in claim 1, which is characterized in that the armour Fill thermocouple（2）Including casing（21）Be arranged in casing（21）The thermocouple wire of interior several mutually separated insulation（22）, institute State gland head lead（41）The other end and the thermocouple wire（22）Between be connected with thermocouple lead（6）, the gland head Lead（41）With the thermocouple lead（6）Pass through binding post（7）Connection, the thermocouple lead（6）With the thermocouple wire （22）Pass through bundle pipes（28）Connection, the bundle pipes（28）It is filled with insulant padding and compacting blend compounds water seal.

10. a kind of armoured thermocouple device with cambered surface sealing structure as claimed in claim 5, which is characterized in that described Seal pipe（3）Valve opening is arranged in side wall, and shut-off valve is successively arranged outside valve opening（32）, pressure gauge（33）And unloading valve（34）.