CN2896170Y - High-temperature sintering furnace - Google Patents

Abstract

A high-temperature sintering furnace used for sintering and annealing of tungsten and molybdenum material, comprises a furnace frame, a furnace body, a gas replacing mechanism, a cooling mechanism, an explosion proof mechanism, a vacuuming mechanism, a furnace, a heating mechanism and an work piece lift mechanism. The heating mechanism composes of an extraction electrode, a positioning sleeve and a tungsten net. The extraction electrodes form a first stack cavity, and the rear ends of the extraction electrodes are of a clamp structure. The positioning sleeve forms a second stack cavity. The tungsten net is put and welded respectively inside the first and second stack cavities. The mesh of the tungsten net is weaved in a spiral pattern. The furnace comprises a furnace sheath with a side shielding device, a top lid equipped with an upper shielding device, a bottom lid equipped with a bottom shielding device. The side shielding device, the upper and lower shielding devices are composed of a plurality of layers of tungsten plates and a plurality of layers of molybdenum plates. The multi-layer tungsten plates and multi-layer molybdenum plates are arranged in a staircase pattern. The extraction electrode of the heating mechanism can be made by thin tungsten sheets which is durable with small deformation. The three shielding devices are connected in a displacement pattern which is beneficial to increase the shielding effect to avoid heat loss inside the furnace. The openings on the furnace bottom lid and furnace body can reach the sealing and locking effect.

Description

High temperature sintering furnace

Technical field

The utility model relates to a kind of high temperature sintering furnace, and particularly a kind of vacuum-hydrogen high temperature sintering furnace is used for sintering and annealing to tungsten, Mo.

Background technology

In the prior art, the high temperature sintering furnace that is used for sintered tungsten, Mo, mainly by grate, be fixedly arranged on body of heater, gas displacement mechanism, cooling body, explosion-proof mechanism, vacuum device on the grate, be located at flue in the body of heater, the material that is located at the heating arrangements in the flue and is used for being sintered is sent to the heating chamber sintering of heating arrangements and moves apart after sintering is finished in the object elevating mechanism of heating chamber etc. and form, the high temperature sintering furnace of this structure can satisfy the vacuum-hydrogen high temperature sintering to tungsten, Mo basically.But the applicant finds to have following deficiency:

At first, as being used for sintered tungsten, the vacuum of Mo-hydrogen high temperature sintering furnace, requirement for flue is comparatively harsh, be in particular in and prevent heat radiation to greatest extent, heat is transmitted, heat convection losses, therefore, in order to satisfy this requirement, to be located in the flue cover the side screening arrangement that is referred to as the side screen and to be configured in flue cover epicoele on the screening arrangement that is referred to as screen that covers and to must organically constituting a good whole barrier between this three set of shield device of screening arrangement that shields under following being referred to as that covers that is engaged in flue cover cavity of resorption, use the efficiency of heating surface that improves the heating arrangements that is positioned at the flue cover, thereby embody both energy savings, improve the effect of sintering effect again.Yet present upper and lower screening arrangement is carried out contraposition and is docked respectively with between the side screening arrangement.That is to say, the side screening arrangement is surrounded by multilayer tungsten plate and multilayer molybdenum plate usually to be formed, equally, upper and lower screening arrangement is also surrounded by multilayer tungsten plate and multilayer molybdenum plate respectively to be formed, when upper and lower cover take respectively upper and lower screening arrangement cover respectively be fitted on flue and put after, the tungsten plate of upper and lower screening arrangement, molybdenum plate are carried out contraposition one to one with tungsten plate, the molybdenum plate of side screening arrangement respectively and are docked.This fiting effect facts have proved and is short of, because heat tends to transmit from dock road, formed crack each other or claim radiate.

Secondly, with regard to heating arrangements, though its structure is comparatively simple, be made of extraction electrode, tungsten net and positioning sleeve, the upper and lower end of tungsten net fixes with extraction electrode, positioning sleeve respectively.Yet, material is that the extraction electrode of tungsten shows as whole real web body structure, cause big difficulty not only for the shaping in the processing, and the upper end that is difficult to make the tungsten net and extraction electrode embody firm and combine closely, thereby influence the thermal effect that adds of tungsten net, even occur to use because of the tungsten net gets loose; Because the network structure of tungsten net is unreasonable, service life is short, and the frequency that causes changing increases the increase that brings use cost to the user; The lower end of tungsten net and material are similarly the weak effect that combines between the positioning sleeve of tungsten; The upper and lower end of tungsten net is realized solid welding by routine welding and extraction electrode, positioning sleeve respectively.

Also have, the locking between the uncovered position, bottom of furnace bottom lid and body of heater requires normally very harsh, if the locking effect is undesirable, then can cause leakage, heat lost such as gas so make product can't sintering or the yield rate of product be affected.In the prior art, only be to make furnace bottom cover pressure holding tightly by the object elevating mechanism to the lifting of furnace bottom lid to be arranged at the bottom of the body of heater along the cutting ferrule circle of locating, thereby make furnace bottom cover uncovered mutually close the joining of realizing with bottom of furnace body, in the time will opening the furnace bottom lid, so as long as furnace bottom lid is moved down by the object elevating mechanism, get product behind sintering from extending the bearing table that covers in furnace bottom then, change tungsten to be sintered, molybdenum product then in holding on (carrying) thing platform, lifting sealing once more enters sintering state.Therefore the applicant thinks that this sealing effectiveness is unsatisfactory, often can not demonstrate fully the effect of sealing safe against all possibilities.

Summary of the invention

Task of the present utility model be to provide a kind of extraction electrode of heating arrangements easy to process, the reticular tissue of tungsten net rationally, extraction electrode and positioning sleeve can with the upper and lower end of tungsten net embody excellent combine effect, flue can prevent thermal loss effectively and reduce the high temperature sintering furnace of deflection.

An also task of the present utility model is will provide between a kind of unlimited position that can guarantee furnace bottom lid and bottom of furnace body to realize abundant airtight high temperature sintering furnace.

Top priority of the present utility model is finished like this, a kind of high temperature sintering furnace, it comprises grate 36, be installed with the body of heater 1 on grate 36, gas displacement mechanism, cooling body, explosion-proof mechanism, vacuum device, flue in body of heater 1, be located at heating arrangements and object elevating mechanism in the flue, described heating arrangements comprise be used for the synthetic heating chamber 48 of one common peripheral at least more than one an extraction electrode 44 and a positioning sleeve 45 and be attached at extraction electrode 44 and positioning sleeve 45 between the tungsten net 50 that equates with extraction electrode 44 of quantity, described extraction electrode 44 constitutes the first stack chamber 55 on an empty stomach, and the rear end of extraction electrode 44 is clip structure, this clip structure comprises first, the second folder lobe 53,54, first, the second folder lobe 53,54 both be inserted with reinforcement electrode 51 in the common folder chamber 52 that forms, in described positioning sleeve 45 comprises, outer wall 49,46, interior, outer wall 49,46 are formed with the second stack chamber 47 between the two; The upper and lower end of described tungsten net 50 holds respectively and is welded in described first, second stack chamber 55,47, and the network structure of tungsten net 50 weaves in the shape of a spiral; Described flue is included in the flue cover 17 that is provided with the side screen device in the mantle cavity and the furnace bottom that is used to cover that get on and the furnace top cover 8 that have screening arrangement in the accent position, upper end that is fitted on flue cover 17 and is used to cover screening arrangement under the having that the accent position, lower end that is fitted on flue cover 17 get on covers 25, the side screen device is made of multilayer tungsten plate 73 and multilayer molybdenum plate 74 respectively, last screening arrangement is made of multilayer tungsten plate 59 and multilayer molybdenum plate 60 respectively, following screening arrangement is made of multilayer tungsten plate 70 and multilayer molybdenum plate 69 respectively, multilayer tungsten plate 73,59,70 and multilayer molybdenum plate 74,60,69 respectively in flue cover 17, furnace roof, bottom 8, form stepped on 25.

An also task of the present utility model is finished like this, at the bottom of the described body of heater along the 101 cutting ferrule circles 22 that are provided with a pair of cylinder post of outer wall tool Connection Block 34, the inboard of cutting ferrule circle 22 is installed with the locking pin 24 that carries roller 79, roller 79 touches with pasting mutually along 101 sidewall at the bottom of the body of heater, and locking pin 24 is arranged with and becomes to have a lock chambers 100, position, edge at described furnace bottom lid 25 has extended at least one group of latch segment 23, latch segment 23 is corresponding in the lock chambers 100, described grate 36 is provided with a pair of acting cylinder 86, and the cylinder post 87 of a pair of acting cylinder 86 links with cylinder post Connection Block 34 respectively.

The chamber shape of heating chamber 48 described in the utility model is any one in drum shape, rectangle, the polygon; Being shaped as of described extraction electrode is plate shaped, in watt shape any one; Described positioning sleeve 45 be shaped as in annular, quadrangle, the hexagon any one, its material is a tungsten; The tungsten filament diameter of described tungsten net 50 is 0.8-1.2mm; The aperture in the braiding hole of described spiral braiding is 4-6mm, and lay of braiding is 4-6mm; Described solid welding is the argon arc welding solid welding.

Tungsten plate 73 described in the utility model and molybdenum plate 74 respectively have five layers, and molybdenum plate 74 is positioned at outside the tungsten plate 73, and the height of five layers of tungsten plate 73 and five layers of molybdenum plate 74 from inside to outside successively increases progressively in the mantle cavity of flue cover 17; Described tungsten plate 59 and molybdenum plate 60 respectively have five layers, and molybdenum plate 60 is positioned at tungsten plate 59 tops, and the diameter of five layers of tungsten plate 59 and five layers of molybdenum plate 60 successively increases progressively on furnace top cover 8; Described tungsten plate 70 and molybdenum plate 69 respectively have five layers, and molybdenum plate 69 is positioned at tungsten plate 70 bottoms, and the diameter of five layers of tungsten plate 70 and five layers of molybdenum plate 69 successively increases progressively on furnace bottom lid 25.

Tungsten plate 73 described in the utility model and molybdenum plate 74 are that the backstay 63 of tungsten is taken in the mantle cavity that clamping ring 65 is fixed in flue cover 17 by material; Described tungsten plate 59 and molybdenum plate 60 are that the backstay 62 of tungsten is taken clamping ring 65 and is fixed on the furnace top cover 8 by material; Described tungsten plate 70 and molybdenum plate 69 are that the backstay 71 of tungsten is taken clamping ring 68 and is fixed on the furnace bottom lid 25 by material.

The cross sectional shape of cutting ferrule circle 22 described in the utility model is any one in the inverted L shaped and shape of a hoof.

The chamber shape of lock chambers 100 described in the utility model is horizontally-arranged U-shaped substantially.

The quantity of latch segment 23 described in the utility model has the 2-3 group, and every group is 1-2 piece, is formed with inclined-plane 80 on the latch segment 23.

A pair of acting cylinder 86 described in the utility model is the diagonal angle setting on grate 36.

A pair of acting cylinder 86 described in the utility model is any one in cylinder and the oil cylinder.

The utility model is the advantage of institute's tool compared with the prior art: front end hollow, the rear end of the extraction electrode 44 of heating arrangements are the clip shape, can process acquisition like a cork by thin tungsten sheet material, on the front end of extraction electrode 44 and positioning sleeve 45, be formed with first, second stack chamber 55,47 respectively, can embed for the upper and lower end of tungsten net 50 and weld through argon arc, can embody good welding effect, the network structure of tungsten net 50 shows as spiral braiding shape, and the durability in the use comparatively ideal and deflection is little; The tungsten of the side screening arrangement of flue, molybdenum plate 73,74 are set to stepped and will constitute tungsten, the molybdenum plate 59,60 of going up screening arrangement be set to stepped and will constitute descend tungsten, the molybdenum plate 70,69 of screening arrangement to be arranged to stepped, thereby make three cooperations between the screening arrangement show as the dislocation butt joint, help improving the shield effectiveness that prevents thermal loss in the courage; In addition, can make the latch segment 23 on the furnace bottom lid 25 tight with locking pin 24 door bolts lock chambers 100 in, make the uncovered position of whole furnace bottom lid 25 and body of heater 1 reach ultimate attainment sealing and fasten with a bolt or latch and close effect by the effect of a pair of acting cylinder 86.

Description of drawings

Fig. 1 is the structure chart of the utility model high temperature sintering furnace.

Fig. 2 is the structure chart with heating arrangements of the present utility model.

Fig. 3 is the structure chart of flue of the present utility model.

Fig. 4 is the structure chart of object elevating mechanism of the present utility model.

Fig. 5 is the cutaway view of the utility model Fig. 1.

The specific embodiment

In Fig. 1, provided grate 36, body of heater 1 by its outer wall on the lower side between side institute a plurality of legs 37 of cloth support and be fixed on the grate 36.Gas displacement described in the utility model mechanism comprise be arranged on the furnace top cover 8 and continue air inlet pipe 42 on inlet suction port 12 with bleed joint 12, a termination that the inner chamber of flue more particularly communicates with the heating chamber 48 of heating arrangements, connect hydrogen, nitrogen switch 40a, 40b at air inlet pipe 42 other ends, hydrogen, nitrogen switch 40a, 40b are connected with sources of hydrogen, source nitrogen respectively by pipeline.

Cooling body of the present utility model comprises that furnace top cover water-in and water-out interface 5,9, body of heater are into and out of interface 35,4, bottom of furnace body water-in and water-out interface 43a, 43b, furnace bottom lid water-in and water-out interface 31,32, furnace top cover water inlet interface 5 communicates with the water trapping layer 7 of furnace top cover 8, furnace top cover water outlet interface 9 employed infrared thermometer 10 and communicating during by means of high temperature with the water trapping layer 7 of furnace top cover 8, furnace top cover water-in and water-out interface 5,9 is connected with cooling water source, and both cooperatively interact and make furnace top cover 8 realize cooling; Body of heater into and out of interface 35,4, correspond respectively to the below and the top of body of heater 1, communicate with the water trapping layer 39 of body of heater 1 separately, both cooperatively interact and make body of heater 1 realize cooling; Bottom of furnace body water-in and water-out interface 43a, 43b communicate with the water trapping layer of the bottom of body of heater 1 respectively, and both cooperate and make bottom of furnace body realize cooling; Furnace bottom lid water inlet interface 31 communicates with the water trapping layer 40 of furnace bottom lid 25 by means of explosion-proof mechanism, furnace bottom lid water outlet interface 32 hangs down and is located at the bottom of furnace bottom lid 25, communicate with water trapping layer 33, both match furnace bottom lid water-in and water-out interface 31,32 and make furnace bottom lid 25 realize cooling.As preferred embodiment, also can cool off by inlet tube and outlet tube 2a, 2b for the extraction electrode 44 of heating arrangements.

Explosion-proof mechanism of the present utility model comprises explosion-proof apparatus 27; seal cover 28; organize by spring standing screw 30 more; the pressure setting device that spring 29 is constituted; explosion-proof apparatus 27 is arranged on the furnace bottom lid 25; corresponding with the explosion-proof air chamber 21 on defaulting in furnace bottom lid 25; seal cover 28 correspondences are in the bottom of explosion-proof apparatus 27; the spring standing screw 30 of every group of pressure setting device is taken described seal cover 28 and is linked on the set flange in explosion-proof apparatus 27 bottoms after being nested with spring 29; when the pressure in the explosion-proof air chamber 21 surpasses setting value; when also promptly surpassing the limit of described spring 29; seal cover 28 is separated and pressure release with explosion-proof apparatus 27, thus the safety of protection body of heater 1.Also extending at the sidepiece of explosion-proof apparatus 27 has igniter to connect gas port 26; after the nitrogen in the body of heater 1 is by hydrogen exchange; in order whether to grasp fully by hydrogen with nitrogen replacement, then can connect gas port 26 and predict by igniter, make the object in the body of heater 1 under hydrogen shield gas, carry out sintering.

Vacuum device described in the utility model comprises the closely interface 18 of bleeding that communicates with the body of heater inner chamber at middle part that continues in body of heater 1 side, the air exhauster 102 (Fig. 5) that docks with the interface 18 of bleeding.After the utility model begins sintering and sintering end, must be vacuumized earlier, make in the body of heater 1 to be in vacuum state, vacuumize end, then first nitrogen injection is used hydrogen exchange nitrogen then.

In Fig. 2, as a concrete example, the given extraction electrode 44 of the utility model has six pieces, and corresponding with it tungsten net 50 just has six fans.Know that by figure is clear the front end of each piece extraction electrode 44 is crescent shape or claims sickle shaped, also can be called banana-shaped, watt shape, but all belong to curved body generally or claim the ball-crown body category.And the bottom of the front end of each extraction electrode 44 (is example with state shown in the accompanying drawing) is uncovered, and the first stack chamber 55 that forms the ditch shape is used in all the other sealings.And the rear end of each extraction electrode 44 is hair clip shape structure, specifically be to be made of first, second folder lobe 53,54, and 52 insertions by reinforcement electrode 51 of formed folder chamber is compensated between first, second folder lobe 53,54.There is shown one piece of reinforcement electrode 51, but this quantity is not unique, according to needing there are two pieces or more pieces.The seen hole that is opened on first, second folder lobe 53,54, the reinforcement electrode 51 is the usefulness that is used for fixing lead-in conductor.Six pieces of extraction electrodes 44 consist of the double star connection of power supply, more can understand, and the quantity of extraction electrode 44 can be limited by the given quantity of present embodiment should by 2～12 pieces or more for this reason and not.As the positioning sleeve 45 that the utility model is recommended, material is a tungsten, is surrounded by inside and outside wall 49,46 and forms ring bodies, and the hole between the inside and outside wall 49,46 is the second stack chamber 47, so that compensated for the lower end insertion of tungsten net 50.Undoubtedly, the width in first, second stack chamber 55,47 should be that the thickness with tungsten net 50 is complementary, and so can guarantee tungsten net 50 welding effect after argon arc welding respectively and between the extraction electrode 44, positioning sleeve 45.

Tungsten net 50 employing diameters are that the tungsten filament helix braiding of 0.8-1.2mm forms, and the diameter preferably of tungsten filament is 0.9-1.1mm, more preferably 1mm.The mesh of tungsten net 50 (eye) diameter is 4.3-4.7mm, is preferably 4.4-4.6mm, 4.5mm more preferably, and lay of braiding is 4-6mm.Foregoing helical form braiding can be understood by form is amplified in the part of accompanying drawing, for example: the first row tungsten filament 56 and secondary series tungsten filament 57 and secondary series tungsten filament 57 and the 3rd row tungsten filament 58 constitute the spiral helicine knot that links mutually by that analogy each other, this braiding structure is comparatively desirable to the durability of tungsten net 50, because can effectively prevent diffusing the taking off between each row tungsten filament.

As previously mentioned, the quantity of tungsten net 50 is to equate with the quantity of extraction electrode 44, no matter no matter but what of the quantity of the number of the quantity of extraction electrode 44 and the tungsten net 50 that matches with extraction electrode 44, should be encircled on the whole one cylindric.Such structure can make the effective radiating area of the utility model heater increase, and ensures the uniformity of temperature in the burner hearth.Because tungsten that is sintered or molybdenum product are in the heating chamber 48.

Know that by above-mentioned if extraction electrode 44 is three pieces, tungsten net 50 is three fans so, consists of single Y-connection.During use, feed power supply to extraction electrode 44 through lead, tungsten net 50 just generates heat.In addition, according to heater element formula: Q=0.24I ²Rt, therefore, the utility model heater is realized work with low-voltage, big electric current.The chamber shape of the heating chamber 48 of present embodiment is a drum shape.When the tabular that is shaped as of extraction electrode 44, when constituting by 4 pieces, corresponding tungsten net 50 just has 4 fans, and centring ring 45 is a quadrangle, and the chamber shape of such heating chamber that constitutes 48 is a rectangular cavity.To above-mentioned explanation, be appreciated that out other shape of heating chamber 48 by the applicant fully, for example hexagonal cellular form or similar type.

Through the applicant heating arrangements in heating arrangements of the present utility model and the prior art is compared use, can improve service life and deflection little, therefore very help saving the use cost of the heating arrangements that price very expensive extraction electrode 44, tungsten net 50, the positioning sleeve 45 made by tungsten constituted, and also very convenient to shaping of extraction electrode 44.

Please continue to see Fig. 2 and, set firmly power wiring seat 3 on first, second folder lobe 53,54 of each extraction electrode 44, introduce three phase mains inlet wire 6 on the power wiring seat 3 in conjunction with Fig. 1.

In Fig. 3, flue cover 17, its material is a stainless steel, offer lead-in wire groove 72 on the top of flue cover 17, be used for three phase mains inlet wire 6 drawn and to first, second folder lobe 53,54 (Fig. 2 shows) of the heating arrangements that is arranged at its mantle cavity, be arranged on fixing feet 81 on the outer wall of flue cover 17 and be used for flue cover 17 fixing with body of heater 1.Successively surround and form by multilayer tungsten, molybdenum plate 73,74 as side screening arrangement of the present utility model, though having provided among the figure respectively is five layers tungsten, molybdenum plate 73,74, but these numbers of plies are not must select and constant, show through applicant's experiment, if be less than three layers, can give the limited influence of shield effectiveness so to a certain extent, but the too much number of plies is for example more than seven layers, bring irrational increase can for so the cost of flue, because the price of tungsten, Mo is extremely expensive.In view of this, the applicant thinks that each is comparatively suitable with three to seven layers, is four to six layers better, preferably respectively is five layers.In case constitute the tungsten of side screening arrangement, the quantity of molybdenum plate 73,74 is that the number of plies is determined, constitute the tungsten of upper and lower screening arrangement so, the quantity of molybdenum plate 59,70,60,69 is determined thereupon.

By Fig. 3 finding, each layer tungsten plate 73 of side screening arrangement is in the mantle cavity inboard of flue cover 17, and each layer molybdenum plate 74 is centered around tungsten plate 73 outsides of outermost one deck, and the function of the lead-in wire groove of being offered on tungsten, the molybdenum plate 73,74 75,76 is with lead-in wire groove 72.Gap between each layer tungsten, the molybdenum plate 73,74 is limited by clamping ring 65, and their location is backstay 63 embodiments of tungsten by material, and an end of backstay 63 is a nut 66, and end is by split pin 64 lockings in addition.Clear by figure, respectively to be that five layers tungsten, molybdenum plate 73,74 is example, increase progressively from inside to outside between each layer, more specifically, the height of five layers of tungsten, molybdenum plate 73,74 increases progressively each other gradually, formation in picturesque disorder step-like, promptly stepped.

For the last screening arrangement of furnace top cover 8 and the following screening arrangement of furnace bottom lid 25, the locate mode of their tungsten, molybdenum plate 59,70,60,69 is identical with the locate mode of aforesaid tungsten, molybdenum plate 73,74, is promptly taken on by corresponding nut 61, backstay 62,71, clamping ring 68 equally.Known to diagram, five of screening arrangement layers of tungsten, molybdenum plate 59,60 also must correspond respectively to tungsten, molybdenum plate 73,74 on the formation, like this, when on the accent of the upper and lower mantle cavity that furnace roof, bottom 8,25 lids is fitted on flue cover 17 by corresponding screw 77, side screening arrangement, upper and lower screening arrangement constitute dislocation each other and cooperate, and this improvement to shield effectiveness benefits.In addition, for the reinforcement of furnace top cover 8, can obtain by reinforcement 15; Being preset in bracket holes 67 on the furnace bottom lid 25 is used for penetrating for the support column 20 of the bearing table 19 of object elevating mechanism.

Please continue to see Fig. 3 and, on furnace top cover 8, also be provided with thermocouple temperature measurement device 11 in conjunction with Fig. 1, the temperature measuring head of this thermocouple temperature measurement device 11 on furnace top cover 8 thermometer hole 13 and communicate with flue inner chamber 16.In addition, for the pressure in the perception flue inner chamber 16, then by Pressure gauge 38 reflections that continue on body of heater 1.

In sum, flue of the present utility model is dislocation butt joint cooperation by the contraposition butt joint cooperation of the original plane form of tungsten plate 73,59,70, the change of the cooperation between the molybdenum plate 74,60,69 of offside, upper and lower screening arrangement, can demonstrate fully and improve shield effectiveness, help energy-conservation and raising sintering efficient.

In Fig. 4, the object elevating mechanism that provides comprises motor 88, reductor 90, transmission case 91, screw rod 97, column 93, carriage 95, fixed head 98, a pair of furnace bottom lid holder 14, motor 88, reductor 90 transmission each other links and places the bottom of grate 36, the shaft gear that goes out on the reduction box 90 is nibbled mutually and is joined with commutation travelling gear 89 in the transmission case 91 that similarly places grate 36 bottoms, and commutation travelling gear 89 is installed on the screw rod 97 of lower extension in the transmission case 91, the top hub setting of screw rod 97 is on the fixed head 98 that is fixed in grate 36 tops, whole screw rod 97 keeps parallel longitudinal with column 93, the lower end of column 93 is installed with on Upright post base 92, and top is fixed on the fixed head 98.Carriage 95 connects with column 93, screw rod 97 by fairlead 94, nut seat 96 respectively, along with screw rod 97 along or contrary rotation, can make carriage 95 do upper and lower moving.The top of a pair of furnace bottom lid holder 14 is fixed with the bottom of furnace bottom lid 25 respectively, be extended with a pair of guide finger 82 and a pair of spike 41 respectively on each furnace bottom lid holder 14, be arranged with spring 83 on the guide finger 82, spring 83 is supported on the spring base 85 of tool guide pin hole 84, spring base 85 is installed on the carriage 95, and the effect of spike 41 is the furnace bottom lids 25 that are used to support after the decline.

See that by this Fig. 4 the outer lower portion of body of heater 1 is formed with the bead that is similar to flange that one expansion established, constitute at the bottom of the body of heater along 101 by this bead.Described cutting ferrule circle 22 by its upper edge 78 be affiliated at the bottom of the body of heater along 101 on, the shape of the cutting ferrule circle 22 that provides among the figure is inverted and L shapedly also promptly is 7 fonts, but U type or claim that the shape of a hoof also is fine fully.The inboard of cutting ferrule circle 22 is installed with a locking pin 24 that carries roller 79, and the lock chambers 100 of whole locking pin 24 forms horizontally-arranged U type, promptly inclines to the left 90 ° by the U type, matches with the upper and lower wall of locking pin 24 lock chambers 100 in for latch segment 23.Owing to be formed with inclined-plane 80 on the latch segment 23, thereby make whole latch segment 23 with 24 lockings of locking pin the time, can give play to the function that is similar to chock.As shown in the figure, when the object elevating mechanism covers furnace bottom after 25 liftings put in place, before sintering furnace enters duty, extend a pair of cylinder post Connection Block 34 in cutting ferrule circle 22 sidepieces under the effect of a pair of cylinder or oil cylinder, promptly under the stretching, extension of cylinder post 87, just driving cutting ferrule circle 22 turn certain angle slightly, specifically is to paste at the bottom of the body of heater side displacement along 101 by roller 79.Because latch segment 23 matches with locking pin 24, therefore just fasten with a bolt or latch gradually tightly by inclined-plane on the latch segment 23 80 and locking pin 24, force whole furnace bottom lid 25 closely upwards to close up at uncovered position, the bottom of body of heater 1, embody good seal cover and close effect.

The latch segment 22 that provides among the figure has 2 groups, and every group has 2 pieces, but this quantity is not unique, for example can have 3 groups, and every group both can be one piece, and also can be two pieces.A pair of acting cylinder 86 is the diagonal angle setting by acting cylinder holder 99 respectively on grate 36, the front end of the cylinder post 87 of acting cylinder 86 respectively is hinged to by bearing pin and extends on the cylinder post Connection Block 34 of cutting ferrule circle 22 sidepieces.It then is to decide according to concrete needs that a pair of acting cylinder 86 adopts oil cylinder or cylinder, adopts cylinder to be advisable usually.In the time will making the utility model high temperature sintering furnace enter duty, earlier be that tungsten or molybdenum part semifinished product place on the bearing table 19 of object elevating mechanism (seeing Fig. 1 and Fig. 5) with material to be sintered, then order about the work of object elevating mechanism, make screw rod 97 rotations, move thereby make on the carriage 95.Because furnace bottom lid 25 is supported on the carriage 95 by a pair of furnace bottom lid holder 14, therefore when carriage 95 is up, it is up to head on guide finger 82 by the spring base on the carriage 95 85, covers 25 up thereby make furnace bottom lid holder 14 carry furnace bottom, after putting in place, the object elevating mechanism quits work.At this moment, a pair of acting cylinder 86 work, cylinder post 87 outwards stretches in cylinder body, and push card lasso 22 is slightly to rotate to an angle, thereby the inclined-plane 80 of the latch segment 23 on the furnace bottom lid 25 is locked with locking pin 24 mutually with the action mode as the chock, so that furnace bottom lid 25 is carried out fully airtight with body of heater 1.As soon as enter into by state shown in Figure 5, high temperature sintering furnace just to the part blank sintering in the flue chamber 16, after sintering is finished, then connects above-mentioned inverse process, and furnace bottom lid 25 is moved down.

The applicant is according to Fig. 5 and respectively scheme letter in conjunction with all the other and chat operation principle of the present utility model, and charging will need on the tungsten of sintering or the bearing table 19 that the molybdenum base substrate places the object elevating mechanism; Bearing table 19 rises, specifically be to drive reduction box 90 by motor 88, shaft gear driven commutation travelling gear 89 by reduction box 90, make screw rod 97 conrotatorys, carriage 95 rises, order about furnace bottom lid 25 and close up, make bearing table 19 carry the heating chamber 48 that base substrate enters into heating arrangements simultaneously towards the uncovered position, bottom of the inner bag of body of heater 1.Then, acting cylinder 86 work under the effect of cylinder post 87, moves cutting ferrule circle 22, by the inclined-plane on the latch segment 23 80 lock chambers 100 in 24 wedgings of locking pin, the flue inner chamber 16 and the external world are abundant to be completely cut off thereby make.Then, air exhauster 102 work vacuumize flue inner chamber 16, open nitrogen switch 40b then, charge into nitrogen in flue inner chamber 16, close nitrogen switch 40b again, open hydrogen switch 40a, by hydrogen exchange nitrogen, try pure again.Enter sintering state, three phase mains is connected (specifically being controlled by electrical control cabinet), and heating arrangements work is incubated during fixed temperature spot when being heated to.By the cooling body cooling, make heating arrangements stop heating simultaneously then.Insulation by nitrogen switch 40b nitrogen injection, is vacuumized by vacuum device after finishing then, remove the locking between latch segment 23 and the locking pin 24 again, in flue inner chamber 16, charge into atmosphere, the object elevating mechanism is descended, get product behind sintering from bearing table 19.

Claims (10)

1, a kind of high temperature sintering furnace, it comprises grate (36), be installed with the body of heater (1) on grate (36), gas displacement mechanism, cooling body, explosion-proof mechanism, vacuum device, flue in body of heater (1), be located at heating arrangements and object elevating mechanism in the flue, it is characterized in that described heating arrangements comprise be used for the synthetic heating chamber (48) of one common peripheral at least more than one an extraction electrode (44) and a positioning sleeve (45) and be attached at extraction electrode (44) and positioning sleeve (45) between the tungsten net (50) that equates with extraction electrode (44) of quantity, described extraction electrode (44) constitutes the first stack chamber (55) on an empty stomach, and the rear end of extraction electrode (44) is clip structure, this clip structure comprises first, the second folder lobe (53), (54), first, the second folder lobe (53), (54) both be inserted with reinforcement electrode (51) in the common folder chamber (52) that forms, in described positioning sleeve (45) comprises, outer wall (49), (46), interior, outer wall (49), (46) be formed with the second stack chamber (47) between the two; The upper and lower end of described tungsten net (50) holds respectively and is welded in described first, second stack chamber (55), (47), and the network structure of tungsten net (50) weaves in the shape of a spiral; Described flue be included in the flue cover (17) that is provided with the side screen device in the mantle cavity and be used for that lid is fitted on that get on and the furnace top cover that have screening arrangement (8) in the accent position, upper end of flue cover (17) and the having that be used for accent position, lower end that lid is fitted on flue cover (17) getting under the furnace bottom of screening arrangement cover (25), the side screen device is made of multilayer tungsten plate (73) and multilayer molybdenum plate (74) respectively, last screening arrangement is made of multilayer tungsten plate (59) and multilayer molybdenum plate (60) respectively, following screening arrangement constitutes multilayer tungsten plate (73) by multilayer tungsten plate (70) and multilayer molybdenum plate (69) respectively, (59), (70) and multilayer molybdenum plate (74), (60), (69) respectively in flue cover (17), furnace roof, bottom (8), (25) upward formation is stepped.

2, high temperature sintering furnace according to claim 1, it is characterized in that being provided with along (101) at the bottom of the described body of heater cutting ferrule circle (22) of a pair of cylinder post of outer wall tool Connection Block (34), the inboard of cutting ferrule circle (22) is installed with the locking pin (24) that carries roller (79), roller (79) pastes mutually with the sidewall on edge (101) at the bottom of the body of heater and touches, and locking pin (24) is arranged with and becomes to have a lock chambers (100), position, edge at described furnace bottom lid (25) has extended at least one group of latch segment (23), latch segment (23) is corresponding in the lock chambers (100), described grate (36) is provided with a pair of acting cylinder (86), and the cylinder post (87) of a pair of acting cylinder (86) links with cylinder post Connection Block (34) respectively.

3, high temperature sintering furnace according to claim 1, the chamber shape that it is characterized in that described heating chamber (48) are any one in drum shape, rectangle, the polygon; Being shaped as of described extraction electrode is plate shaped, in watt shape any one; Described positioning sleeve (45) be shaped as in annular, quadrangle, the hexagon any one, its material is a tungsten; The tungsten filament diameter of described tungsten net (50) is 0.8-1.2mm; The aperture in the braiding hole of described spiral braiding is 4-6mm, and lay of braiding is 4-6mm; Described solid welding is the argon arc welding solid welding.

4, high temperature sintering furnace according to claim 1, it is characterized in that described tungsten plate (73) and molybdenum plate (74) respectively have five layers, molybdenum plate (74) is positioned at outside the tungsten plate (73), and the height of five layers of tungsten plate (73) and five layers of molybdenum plate (74) from inside to outside successively increases progressively in the mantle cavity of flue cover (17); Described tungsten plate (59) and molybdenum plate (60) respectively have five layers, and molybdenum plate (60) is positioned at tungsten plate (59) top, and the diameter of five layers of tungsten plate (59) and five layers of molybdenum plate (60) successively increases progressively on furnace top cover (8); Described tungsten plate (70) and molybdenum plate (69) respectively have five layers, and molybdenum plate (69) is positioned at tungsten plate (70) bottom, and the diameter of five layers of tungsten plate (70) and five layers of molybdenum plate (69) successively increases progressively on furnace bottom lid (25).

5,, it is characterized in that described tungsten plate (73) and molybdenum plate (74) are that the backstay (63) of tungsten is taken clamping ring (65) and is fixed in the mantle cavity of flue cover (17) by material according to claim 1 or 4 described high temperature sintering furnaces; Described tungsten plate (59) and molybdenum plate (60) are that the backstay (62) of tungsten is taken clamping ring (65) and is fixed on the furnace top cover (8) by material; Described tungsten plate (70) and molybdenum plate (69) are that the backstay (71) of tungsten is taken clamping ring (68) and is fixed on the furnace bottom lid (25) by material.

6, high temperature sintering furnace according to claim 2, the cross sectional shape that it is characterized in that described cutting ferrule circle (22) are any one in the inverted L shaped and shape of a hoof.

7, high temperature sintering furnace according to claim 2 is characterized in that the chamber shape of described lock chambers (100) is horizontally-arranged U-shaped substantially.

8, high temperature sintering furnace according to claim 2 is characterized in that the quantity of described latch segment (23) has the 2-3 group, and every group is 1-2 piece, is formed with inclined-plane (80) on the latch segment (23).

9, high temperature sintering furnace according to claim 2 is characterized in that described a pair of acting cylinder (86) is the diagonal angle setting on grate (36).

10,, it is characterized in that described a pair of acting cylinder (86) is any one in cylinder and the oil cylinder according to claim 2 or 9 described high temperature sintering furnaces.

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