CN100432610C - Gas cooling type vacuum heat treating furnace and cooling gas direction switching device - Google Patents
Gas cooling type vacuum heat treating furnace and cooling gas direction switching device Download PDFInfo
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- CN100432610C CN100432610C CNB2004800182131A CN200480018213A CN100432610C CN 100432610 C CN100432610 C CN 100432610C CN B2004800182131 A CNB2004800182131 A CN B2004800182131A CN 200480018213 A CN200480018213 A CN 200480018213A CN 100432610 C CN100432610 C CN 100432610C
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Abstract
The present invention provides a gas cooling type vacuum heat treating furnace, comprising a gas cooling furnace having a cooling chamber allowing the stationary placement of a treated article therein and forming a gas flow passage in the vertical direction, a gas cooling/circulating device circulatingly cooling gas flowing in the cooling chamber, a gas direction switching device alternately switching the direction of the gas vertically passing the inside of the cooling chamber, and upper and lower straighteners closing the upper and lower ends of the cooling chamber to uniformize the velocity distribution of the gas passing the cooling chamber.
Description
Technical field
The present invention relates to a kind of gas cooled vacuum heat treatment furnace and refrigerating gas reversing arrangement thereof.
Background technology
Vacuum heat treatment furnace is a kind of after inner pressure relief, recharges the heat-treatment furnaces so that processed product are heat-treated such as inert gas.The advantage that vacuum heat treatment furnace has is, when heat-treating, make attached to after the generation gasifications such as moisture that reach in the stove on the processed product through heating, reduce pressure once more and recharge inert gas etc., can remove moisture fully like this, and the color that elimination is brought by moisture, this heat treatment (being called brightness heat treatment).
In addition, the gas cooled vacuum heat treatment furnace also has series of advantages, can the decarburization carburizing as carrying out brightness heat treatment, distortion less, operating environment is good etc.Yet early stage gas cooled vacuum heat treatment furnace has some shortcomings, owing to be the decompression cooled cause cooling velocity fast inadequately.The actual for this reason high speed recyclegas type of cooling that adopts is to improve cooling velocity.
Fig. 1 is the structure chart of disclosed high speed recyclegas cool furnace in non-patent literature 1.In the figure, the 50th, adiabatic material, the 51st, heater, the 52nd, effective operation district, the 53rd, body of heater and water collar, the 54th, heat exchanger, the 55th, turbine blower fan, the 56th, fan cools off door, the 58th with motor, the 57th, siege, the 59th, gas operated device, the 60th, the adjuster of the flow direction of refrigerating gas (air channel) conversion.
In addition, following " gas circulation cooling promotion law in the vacuum drying oven " described in the patent documentation 1, that is: as shown in Figure 2, a kind of vacuum drying oven, the heating clamber 66 that is surrounded by adiabatic wall 67 is set in the vacuum tank 61 of sealing, configuration heater 62 in heating clamber, heat being heated thing 64 by this heater in a vacuum, cooler 62 and fan 63 also are set in vacuum tank 61 simultaneously, cool off by 62 pairs of non-oxidizing gas that are fed in the vacuum tank of cooler, under the turning effort of fan 63, from being arranged on the opening 68 on 67 of the adiabatic walls faced mutually with heating clamber 66,69, non-oxidizing gas in the heating clamber 66 is circulated in heating clamber 66, thereby forced circulation gas is heated thing 64 with cooling, it is characterized in that, hear resistance tube cover 65 in this vacuum drying oven, at least the one end will form the shape of expansion gradually, this cover disposes as follows, that is: be separated by suitable spacing ground surround be placed in the heating clamber 66 heated thing 64 around, and its two ends and above-mentioned opening 68,69 is relative, so non-oxidizing gas is able to circulation in heating clamber 66.In addition, 70 among the figure is that refrigerating gas flows to the commutation adjuster in (air channel).
(non-patent literature 1)
The rugged victory in mountain is great, the vacuum heat of metal material (2), and No. 2, heat treatment 30 volumes are put down in April, 2
(patent documentation 1)
Te Kaiping 5-230528 communique
High speed recyclegas cool furnace has been described, owing to this cool furnace is to carry out heating and cooling at same place to have following problem points in non-patent literature 1 and patent documentation 1.
(1) when heating finishes, the heater and the stove body temperature of heating usefulness can become very high, and when cooling, heater and stove body temperature are cooled off simultaneously, so heat treatment material can not cool off at a high speed.
(2) heater and the body of heater of heating usefulness are arranged around heat treatment material, so cooling the time can not evenly be supplied with refrigerating gas.
(3) even hocket gas cooled along the vertical direction, also not having two sides' refrigerating gas rectification up and down is the device of the even velocity and the flow direction, therefore is difficult to reduce the stress of whole heat treatment material.
In addition, in the high speed recyclegas cool furnace described in above-mentioned non-patent literature 1 and the patent documentation 1, the common mechanism that is used as changing airflow direction (air channel) up and down in the adjusting device that adopts above-below direction.But, when the up-down adjustment device is the switching mechanism of refrigerating gas direction, can have following problem.
(4) owing to the position of the switch of adjusting device, under the blast effect of passing through at a high speed, its load change is very big.Therefore, under the situation of gases at high pressure, be difficult to drive smoothly with the adjuster mode because of being subjected to influenced by wind pressure.
(5) the switch angle and the aperture area of adjusting device are disproportionate.Therefore, when up and down a plurality of drive units are seen off conversion, be difficult to aperture area is adjusted balance, the aperture area of suction inlet and outlet produces difference, or its change becomes big, makes air conditioning quantity produce change, thereby is difficult to the stable gas cooled of carrying out.
(6), thereby cause structure complicated up and down because of existing a plurality of adjusting devices to need a plurality of drive units.
(7) aperture area limits along being conditioned device up and down, compares less with the body of heater inner area.
Summary of the invention
The present invention puts forward in order to address the above problem a little just.Promptly, first purpose of the present invention is to provide a kind of gas cooled vacuum heat treatment furnace, this processing stove can carry out the high speed cooling to heat treatment material when cooling, refrigerating gas is supplied with whole heat treatment material equably, and two sides up and down, with the refrigerating gas rectification be speed evenly, flow to identical gas, thereby reduce the stress of whole heat treatment material.
In addition, second purpose of the present invention is to provide a kind of refrigerating gas reversing arrangement of gas cooled vacuum heat treatment furnace, this device is not vulnerable to the influence of blast, can successfully change gas flow (air channel), be difficult for producing the change of aperture area and the opening surface product moment of suction inlet and outlet, can stablize and carry out gas cooled, in single drive unit simple in structure, can change, and guarantee bigger aperture area.
In order to realize first purpose, can provide a kind of gas cooled vacuum heat treatment furnace according to first invention, this gas cooled vacuum heat treatment furnace is equipped with the gas cooled stove that cools off the processed product that heated by the recyclegas of pressurization, it is characterized in that, the above-mentioned gas cool furnace comprises: cooling chamber, cooled region in its encirclement leaves standstill processed product, is formed with the gas flow of cross section certain (constant) along the vertical direction in its inboard; The gas cooled EGR is to cooling off by the gas in this cooling chamber along the vertical direction and circulating; The gas reversing arrangement, alternately the direction of the gas in the cooling chamber is passed through in conversion along the vertical direction; Rectifier up and down blocks the upper end and the lower end of cooling chamber, and with the homogenising of the VELOCITY DISTRIBUTION of the gas realizing passing through, the above-mentioned gas cooling-cycle device comprises: cooling fan, and adjacent setting with cooling chamber attracts gas and pressurization by cooling chamber; Heat exchanger, cooling is by the gas of this cooling fan attraction indirectly, and the above-mentioned gas reversing arrangement comprises: hollow cover forms encirclement to above-mentioned heat exchanger, and keeps between the two at interval; Be used for the lift cylinders of this cover of lifting, above-mentioned cover has: at the down position place, the below that is connected with the below of cooling chamber attracts mouthful; In raised position, the top that is connected with the top of cooling chamber attracts mouth.
According to first invention, upper end and the lower end of blocking cooling chamber by rectifier up and down, it is even that thereby the VELOCITY DISTRIBUTION that makes the gas that passes through becomes, gas flow rate by cooled region can be changed being controlled at bottom line thus, make the refrigerating gas that blows on the processed product can not produce more turbulent flow.In addition, also discharge uniform refrigerating gas by the export department behind the processed product, then also can produce power of enforcement so that refrigerating gas passes through the central portion of processed product, thus reduce the stress of whole heat treatment material.And, the below is attracted mouthful and the top attracts mouth alternately to be connected with the attraction side of cooling fan by the gas reversing arrangement, so can be in cooling chamber alternately change direction by gas along above-below direction.It is poor to reduce the cooling velocity of bringing because of the position of the processed product behind the location by this conversion, can reduce the stress of whole heat treatment material.
Second invention is the preferred implementation of first invention, above-mentioned rectifier up and down comprises stacked uniform distribution portion and rectification part mutually, be somebody's turn to do rectifier up and down or have uniform distribution portion simultaneously and rectification part both sides' function, uniform distribution portion has a plurality of crushings and produces mechanism, these even structure are configured on the vertical direction with above-mentioned ascending air, and to ascending air additonal pressure loss coefficient at the flow passage resistance force of waterproof more than 0.1, to realize the uniform distribution of flow velocity; Rectification part is made up of a plurality of honeycomb screens, and these honeycomb screens carry out rectification to the flow direction of the ascending air by uniform distribution portion.
According to second invention, can produce the homogenising that mechanism realizes velocity flow profile by a plurality of crushings, realize the homogenising of air flow direction by a plurality of honeycomb screens.
The 3rd invention is the preferred implementation of first invention, is provided with auxiliary distributor gear in the present invention, and this mechanism is about cooling chamber, to the airflow direction channeling conduct of turnover cooling chamber.
According to the 3rd invention, by auxiliary distributor gear (for example being blown into plate) is set,, also can make airflow direction optimization in the face of plurality of positions even the area up and down of cooling chamber is bigger, improve homogenising and flow.
In order to realize second purpose, a kind of refrigerating gas reversing arrangement of gas cooled vacuum heat treatment furnace is provided according to the 5th invention, the refrigerating gas reversing arrangement of this cooled vacuum heat treatment furnace has: cooling chamber, leave standstill processed product at the cooled region of its encirclement; The gas cooled EGR, cooling also cycles through the interior gas of this cooling chamber, this refrigerating gas reversing arrangement cools off the processed product that heated by the recyclegas of pressurization, it is characterized in that, comprising: with the isolated stationary barrier of cooling chamber and gas cooled EGR; Along the surface of stationary barrier and be subjected to rotating the rotating barrier of driving, stationary barrier has and runs through comprehensive opening substantially, rotating barrier has attraction opening and the outlet opening that partly is communicated with the suction inlet and the outlet of gas cooled EGR, so can alternately change the direction by the gas in the cooling chamber.
According to the 5th invention, as long as the edge drives rotating barrier with the surface rotation of the isolated stationary barrier of cooling chamber and gas cooling-cycle device, just can alternately change direction by the gas in the cooling chamber, therefore, even gases at high pressure (high density gas), but,, also can successfully change the air channel so be not vulnerable to influenced by wind pressure because rotating barrier carries out driving perpendicular to the rotation that flows to.
In addition, rotating barrier has attraction opening and the outlet opening that partly is communicated with mutually with the suction inlet and the outlet of gas cooled EGR, therefore be difficult for producing the change of aperture area and the opening surface product moment of suction inlet and outlet, can stably carry out gas cooled thus.In addition, in single drive unit simple in structure, change, can guarantee bigger aperture area.
The 6th invention is the preferred implementation of the 5th invention, above-mentioned cooling chamber has along the vertical direction by its inboard gas flow, aperture position is provided with as follows, that is: gas in cooling chamber towards below when flowing, attract opening only to be connected, and outlet opening only is connected with the top of cooling chamber with the below of cooling chamber; Gas in cooling chamber towards above when flowing, attract opening only to be connected, and outlet opening only is connected with the below of cooling chamber with the top of cooling chamber.
According to the 6th invention, in isolated body of heater inner area A with cooling chamber and gas cooling-cycle device, the suction inlet of gas cooled EGR and outlet respectively are 1/2, and in suction inlet and outlet, respectively have 1/2 be below, above, can attract opening and outlet opening to be set at about 1/4 of body of heater inner area A like this.Thus, compared with prior art, can add the wind trunk area, reduce the flow velocity that passes through of gas, reduce the pressure loss.
In addition, between stationary barrier and gas cooling-cycle device, whole medial surface is connected with the suction inlet of gas cooled EGR, whole lateral surface is connected with the outlet of gas cooled EGR, so gap that can fully keep outlet/suction inlet, even only the opening demifacet also can extend to opposing face, thereby effectively utilize whole heat exchanger.
The 7th invention is the preferred implementation of the 5th invention, aperture position is provided with as follows, that is: when gas flows in above-mentioned cooling chamber along the vertical direction, attract opening selectively only with the below of cooling chamber or only be connected, and outlet opening is only with the top of cooling chamber or only be connected with the below with the top; When gas along continuous straight runs in above-mentioned cooling chamber flows, attract opening selectively only with arbitrary one-sided being connected of cooling chamber, and outlet opening selectively only is connected with an opposite side of cooling chamber.
According to the 7th invention,, just can freely convert direction to above-below direction and left and right directions by the gas in the cooling chamber as long as rotate the driving rotating barrier along surface with the isolated stationary barrier of cooling chamber and gas cooling-cycle device.
The 8th invention is the preferred implementation of the 5th invention, comprising: cooling fan, and its adjacent setting with cooling chamber attracts gas and pressurization by cooling chamber; Heat exchanger, cooling is from the gas of this cooling fan discharge indirectly.
By adopting the 8th invention, between stationary barrier and gas cooling-cycle device, whole medial surface is connected with the suction inlet of gas cooled EGR, whole lateral surface is connected with the outlet of gas cooled EGR, so gap that can fully keep outlet/suction inlet, even only the opening demifacet also can extend to opposing face, thereby effectively utilize whole heat exchanger.
Can illustrate other purpose of the present invention and favourable feature according to following explanation in conjunction with the accompanying drawings.
Description of drawings
Fig. 1 is the structure chart of disclosed high speed recyclegas cool furnace in non-patent literature 1.
Fig. 2 is the structure chart of the gas circulation cooling promotion law in vacuum drying oven of patent documentation 1.
The overall structure figure of the gas cooled vacuum heat treatment furnace that Fig. 3 is in the embodiment of the invention to be adopted.
Fig. 4 is the partial enlarged drawing of Fig. 3.
Fig. 5 is the sectional view along the A-A line of Fig. 4.
Fig. 6 is the overall structure figure of vacuum heat treatment furnace with refrigerating gas reversing arrangement of first embodiment of the invention.
Fig. 7 is the partial enlarged drawing of Fig. 6.
Fig. 8 is the B portion enlarged drawing of Fig. 7.
Fig. 9 A, Fig. 9 B are the sectional views along C-C line among Fig. 7.
Figure 10 A, Figure 10 B are the sectional views of the refrigerating gas reversing arrangement of expression second embodiment of the invention, and this sectional view is consistent with Fig. 5.
The specific embodiment
Below, in conjunction with the accompanying drawings preferred implementation of the present invention is described.In addition, the common segment in each accompanying drawing adopts identical Reference numeral, and the repetitive description thereof will be omitted.
The overall structure figure of the gas cooled vacuum heat treatment furnace that Fig. 3 is among the present invention to be adopted.As shown in the drawing, vacuum heat treatment furnace of the present invention is a kind of multi-chamber type heat processing furnace, comprising: vacuum furnace 10, gas cooled stove 20 and mobile device 30.
The function that vacuum furnace 10 has is: after 1 decompression of processed product, can fill inert gas once more and wait and heat processed product.The function that gas cooled stove 20 has is: available pressurized circulation gas 2 cools off the processed product 1 that heated.The function that mobile device 30 has is: processed product 1 are moved between vacuum furnace 10 and gas cool furnace 20.In addition, the present invention is not limited to multi-chamber type heat processing furnace, also can be to carry out heating in vacuum and gas-cooled one-way fired furnace in single chamber.
Fig. 4 is the partial enlarged drawing of Fig. 3, and Fig. 5 is the sectional view along A-A line among Fig. 4.As Fig. 3～shown in Figure 5, gas cooled stove 20 comprises: vacuum tank 21, cooling chamber 22, gas cooled EGR 24, gas reversing arrangement 26 and rectifier 28.
Mounting table 23 is arranged on the height place identical with the mounting table 15 of vacuum furnace 10, can move freely on built-in roller.In addition as shown in Figure 5, be provided with horizontal baffle 22c between container body 21b and adiabatic wall 22b, dividing plate carries out air hermetic to the gas up and down that is located at cooling chamber 22 and separates.
Gas cooled EGR 24 comprises: cooling fan 24a, and itself and cooling chamber 22 adjacent settings attract gas and pressurization by cooling chamber 22; Heat exchanger 25 cools off indirectly to the gas that is attracted by cooling fan 24a.Cooling fan 24a is subjected to rotating drive under the effect of the cooling fan motor 24b on the circulation portions 21c that is installed in vacuum tank 21, from the central portion attraction gas of fan, discharge from peripheral part.Heat exchanger 25 for example is the cooling fins pipe that is subjected to water-cooled in inside.By said structure, can attract the cool cycles gas the heat exchanger 25 from central portion, discharge gas from peripheral part, and along the vertical direction to cooling off by the gas in the cooling chamber 22 and circulating.
In this example, gas reversing arrangement 26 comprises: hollow cover 26a, it forms heat exchanger 25 and surrounds, and is keeping at interval between the two: lift cylinders 27 is used for lifting hollow cover 26a.Hollow cover 26a has: at the down position place, the below that is connected with the below of cooling chamber 22 attracts a mouthful 26b; In raised position, the top that is connected with the top of cooling chamber 22 attracts mouth.
Said structure has following effect, that is: make the below attract mouthful 26b and top to attract mouth alternately to be connected by gas reversing arrangement 26 with the attraction side of cooling fan 24a, so can alternately change along the vertical direction by the gas direction in the cooling chamber 22, thereby the cooling velocity that the position caused that reduces the processed product behind the location is poor, reduces the stress of whole heat treatment material.
Be arranged on the rectifier 28 of top and the bottom, can be used to block the upper end and the lower end of cooling chamber 22, it has the uniform function of VELOCITY DISTRIBUTION that makes by the gas of cooling chamber 22.
The 28a of uniform distribution portion has a plurality of crushings and produces structure, these mechanisms evenly are configured in (being horizontal direction in this example) on the direction that intersects vertically with air-flow 2, pressure drop coefficient by additional air flow is at the flow passage resistance force of waterproof more than 0.1, to realize the uniform distribution of flow velocity.It for example is through hole that crushing produces mechanism, and it can realize the uniform distribution of flow velocity by additional flow passage resistance force of waterproof.Flow passage resistance force of waterproof (crushing) proportion in whole pressure losses of air-flow 2 is high more, the uniform distribution effect is just obvious more, preferred situation is that the flow passage resistance force of waterproof (crushing) that crushing is up and down produced mechanism is set in the pressure drop coefficient of ascending air 2 more than 0.1.
In addition, between pressure drop coefficient ζ and loss pressure head h, flow velocity V, the gravity acceleration g, has the relation of following formula (1).
H＝ζ·V
2/(2·g) …(1)
Said structure produces mechanism by a plurality of crushings and realizes the velocity flow profile homogenising, realizes the even of air flow direction by a plurality of honeycomb screens.
In addition, with regard to gas cooled vacuum heat treatment furnace of the present invention, on cooling chamber 22, have auxiliary distributor gear 29 (for example being blown into plate), it is used for guiding the airflow direction that flows out, flows into from cooling chamber, even the area up and down of cooling chamber is bigger, also can make airflow direction optimization, improve homogenising and flow in the face of many places.
According to the invention described above, upper end and the lower end of blocking cooling chamber 22 by rectifier 28 up and down, thereby make the VELOCITY DISTRIBUTION of the gas that passes through even, the velocity variations of the air-flow by cooled region can be controlled at minimum limit thus, make the refrigerating gas that blows on the processed product can not produce more turbulent flow.In addition, because the export department behind the processed product 1 also evenly discharges refrigerating gas, so also can produce power of enforcement, make refrigerating gas also evenly pass through the central portion of processed product, thereby reduce the stress of whole heat treatment material.
As mentioned above, gas cooled vacuum heat treatment furnace of the present invention has following significant effect, that is: can when cooling, cool off heat treatment material at a high speed, uniform refrigerating gas can be supplied with whole heat treatment material, and on both direction up and down, refrigerating gas be rectified into speed evenly, towards uniform gas, thereby reduce the stress etc. of heat treatment material integral body.
Fig. 6 is the overall structure figure of vacuum heat treatment furnace with refrigerating gas reversing arrangement of first embodiment of the invention.This vacuum heat treatment furnace is a kind of multi-chamber type heat processing furnace that comprises vacuum furnace 10, gas cooled stove and mobile device 30, and the structure of vacuum furnace 10 and mobile device 30 is identical with the structure of above-mentioned Fig. 3.
Fig. 7 is the partial enlarged drawing of Fig. 6.As Figure 6 and Figure 7, gas cooled stove 20 comprises: vacuum tank 21, cooling chamber 22, gas cooled EGR 24, refrigerating gas reversing arrangement 40, rectifier 28 and auxiliary distributor gear 29.The structure of vacuum tank 21, cooling chamber 22, rectifier 28 and auxiliary distributor gear 29 is identical with the structure of above-mentioned Fig. 4 and Fig. 5.
Gas cooled EGR 24 comprises: cooling fan 24a with cooling chamber 22 adjacent settings, attracts gas and pressurization by cooling chamber 22; Heat exchanger 25 cools off indirectly to the gas of being discharged by cooling fan 24a.Cooling fan 24a is subjected to rotating drive under the effect of the cooling fan motor 24b on the circulation portions 21c that is installed in vacuum tank 21, from the central portion attraction gas of fan, discharge from peripheral part.Heat exchanger 25 for example is the cooling fins pipe that is subjected to water-cooled in inside.By said structure, the recyclegas that 25 coolings of available heat interchanger are discharged from peripheral part, and to cooling off by the gas in the cooling chamber 22 along the vertical direction and circulating.
Fig. 8 is the B portion enlarged drawing of Fig. 7.As shown in the drawing, refrigerating gas reversing arrangement 40 of the present invention comprises: stationary barrier 42, rotating barrier 44 and rotating driving device 46.
At the central portion place of stationary barrier 42, be provided with the bearing housing 43 of built-in bearing 43a.Support 43b supports this bearing housing 43 from the circulation portions 21c of vacuum tank 21.
The central part of rotating barrier 44 is fixed in rotating shaft 45, limits the rotation of relative rotation axi 45 by being inlaid in key on the central part.This rotating shaft 45 is supported on the cooling fan 24a coaxial with it by bearing 43a.Between the shaft end (left end in the accompanying drawing and gripper shoe 45a) and rotating barrier 44 of rotating shaft 45, clamping has the compression spring 47 of compressive state, and it often applies active force towards rotating barrier 44, thereby can reduce gap between the two.Therefore, additional springs can improve function.
On the end face of above-mentioned horizontal baffle 22c (with reference to figure 5) and the end face of stationary barrier 42, set up seal 48, its be used for sealing between the rotating barrier 44, and and the gap of 44 of rotating barriers.For example, sealing part 48 is rub lower ledrite, graphite etc., can reduce to leak and make the motion smoothness.
Fig. 9 A and Fig. 9 B are the sectional views along C-C line among Fig. 7.Fig. 9 A is the sectional view along the C-C line, promptly is the front view of rotating barrier 44, and Fig. 9 B is a sectional view of removing rotating barrier 44, promptly is the front view of stationary barrier 42.
Rotating barrier 44 comprises: the attraction opening 44a and the outlet opening 44b that partly are communicated with the suction inlet and the outlet of gas cooled EGR.
In first embodiment of Fig. 9 A and Fig. 9 B, cooling chamber 22 has along the vertical direction by its inboard gas flow, aperture position is provided with as follows, that is: gas in cooling chamber 22 towards below when flowing, make and attract opening 44a only to be connected with the below of cooling chamber, outlet opening 44b only is connected with the top of cooling chamber, and gas in cooling chamber 22 towards above when flowing, attract opening 44a only to be connected with the top of cooling chamber, outlet opening 44b only is connected with the below of cooling chamber.
In addition, in this example, attract opening 44a to be roughly 1/2 circle, outlet opening 44b be roughly 1/2 fan-shaped, trunnion axis (above-mentioned horizontal baffle 22c) and being provided with on the contrary each other relatively.
Pass through said structure, in isolated body of heater inner area A with cooling chamber 22 and gas cooling-cycle device 24, the suction inlet of gas cooled EGR and outlet respectively account for 1/2, and in suction inlet and outlet, respectively have 1/2 to be below, top, can will attract opening 44a and outlet opening 44b to be set at 1/4 of about body of heater inner area A respectively like this.Thus, can obtain bigger air channel area, reduce the flow velocity that passes through of gas, reduce the pressure loss.
In addition, between stationary barrier 42 and gas cooling-cycle device 24, whole medial surface is connected with the suction inlet of gas cooled EGR, whole lateral surface is connected with the outlet of gas cooled EGR, therefore, can fully keep the gap of outlet/suction inlet, even opening demifacet only, also can extend to opposing face, thereby effectively utilize whole heat exchanger.
By adopting the structure of the invention described above, as long as the edge is with the surface of the isolated stationary barrier of cooling chamber and gas cooling-cycle device, rotation drives rotating barrier, just can alternately change direction by the gas in the cooling chamber, therefore, even high-speed gas (gas that density is higher), but because rotating barrier carries out the rotation driving perpendicular to the flow direction, so be not vulnerable to influenced by wind pressure, and can successfully change the air channel.
In addition, rotating barrier has the opening of attraction and outlet opening, they partly are communicated with the suction inlet and the outlet of gas cooled EGR, so the difficult generation of the difference of the aperture area of the change of aperture area and suction inlet and outlet, can stably carry out gas cooled thus.In addition, also be convertible into single drive unit simple in structure, so can guarantee bigger aperture area.
In addition, above-mentioned is that the embodiment of last dirty air-flow is represented, but also can be with the rotating barrier half-twist, the rectifier of cooling chamber be installed in the side (about), so as about the switching mechanism of stream.
In addition, the above is for to be arranged on the outlet of cooling fan 24a and the embodiment on the runner between the stationary barrier 42 with heat exchanger 25, and the outside (cooling chamber 22 sides) that still also it can be arranged on rotating barrier 44 is to substitute above-mentioned embodiment.
Figure 10 A and Figure 10 B are the sectional views of refrigerating gas reversing arrangement of expression second embodiment of the invention, and this sectional view is identical with sectional view among Fig. 9 A and Fig. 9 B.Figure 10 A is the sectional view along the C-C line, i.e. the front view of rotating barrier 44, and Figure 10 B is a sectional view of removing rotating barrier 44, promptly is the front view of stationary barrier 42.
Second embodiment can be corresponding with two kinds of air current flow, that is: make the air-flow that gas (goes up dirty) when above-below direction flows in cooling chamber and make gas in cooling chamber when horizontal direction flows the air-flow of (horizontal flow).
In this example promptly, attracting opening 44a is 1/4 circle substantially, and outlet opening 44b is 1/4 fan-shaped substantially, the two relative trunnion axis (above-mentioned horizontal baffle 22c) and being provided with on the contrary each other.
In a second embodiment, when gas flows in cooling chamber 22 along the vertical direction, same with Fig. 9 A and Fig. 9 B, attract opening 44a selectively only with the below of cooling chamber 22 or only be connected, and outlet opening 44b is selectively only with the top of cooling chamber or only be connected with the below with the top.In addition, aperture position is provided with as follows, shown in Figure 10 A, that is: when gas along continuous straight runs in cooling chamber 22 flows, attract opening 44a selectively only with arbitrary one-sided being connected of cooling chamber, and outlet opening 44b only with opposite one-sided being connected of cooling chamber.
By said mechanism, as long as with the surface of the isolated stationary barrier of cooling chamber and gas cooling-cycle device, rotating, the edge drives rotating barrier, just can freely convert direction to above-below direction and left and right directions by the gas in the cooling chamber.
In addition, refrigerating gas reversing arrangement of the present invention is not limited to the device that heating clamber and cooling chamber are separated from each other, and also can use the one-way fired furnace that carries out heating and cooling in same chamber.
As mentioned above, the refrigerating gas reversing arrangement of vacuum heat treatment furnace of the present invention has following remarkable result, that is: be difficult for being subjected to the influence of blast and can carry out smoothly the flow direction (air channel) conversion of refrigerating gas, the change of aperture area, also be difficult for producing with the opening surface product moment of suction inlet and outlet, can stablize and carry out gas cooled, in single drive unit simple in structure, change, and guarantee bigger aperture area etc.
In addition, the above is some preferred implementations of gas cooled vacuum heat treatment furnace of the present invention and refrigerating gas reversing arrangement thereof, but can think, these embodiment are not so the qualification claim scope that the present invention covered.Otherwise whole improvement, modification and equivalent in the appended claim scope all are contained in the claim scope of the present invention.
Claims (3)
1, a kind of gas cooled vacuum heat treatment furnace, this gas cooled vacuum heat treatment furnace are equipped with the gas cooled stove that cools off the processed product that heated by the recyclegas of pressurization, it is characterized in that,
The above-mentioned gas cool furnace comprises: cooling chamber, leave standstill processed product at the cooled region of its encirclement, and be formed with the certain gas flow in cross section along the vertical direction in its inboard; The gas cooled EGR is to cooling off by the gas in this cooling chamber along the vertical direction and circulating; The gas reversing arrangement, alternately the direction of the gas in the cooling chamber is passed through in conversion along the vertical direction; Rectifier up and down blocks the upper end and the lower end of cooling chamber, with the homogenising of the VELOCITY DISTRIBUTION of the gas realizing passing through,
The above-mentioned gas cooling-cycle device comprises: cooling fan, and adjacent setting with cooling chamber attracts gas and pressurization by cooling chamber; Heat exchanger cools off the gas that is attracted by this cooling fan indirectly,
The above-mentioned gas reversing arrangement comprises: hollow cover forms encirclement to above-mentioned heat exchanger, and keeps between the two at interval; Be used for the lift cylinders of this cover of lifting, above-mentioned cover has: at the down position place, the below that is connected with the below of cooling chamber attracts mouthful; In raised position, the top that is connected with the top of cooling chamber attracts mouth.
2, gas cooled vacuum heat treatment furnace as claimed in claim 1, it is characterized in that, above-mentioned rectifier up and down comprises stacked uniform distribution portion and rectification part mutually, or has uniform distribution portion and rectification part both sides' a function, uniform distribution portion has a plurality of crushings and produces mechanism, evenly be configured on the vertical direction of ascending air, and to above-mentioned ascending air additonal pressure loss coefficient at the flow passage resistance force of waterproof more than 0.1, to realize the uniform distribution of flow velocity; Rectification part comprises a plurality of honeycomb screens, and these honeycomb screens carry out rectification to the flow direction of the ascending air by uniform distribution portion.
3, gas cooled vacuum heat treatment furnace as claimed in claim 1, it is characterized in that, cooling chamber also be provided with auxiliary distributor gear up and down, this mechanism is to the airflow direction of inflow gas reversing arrangement or the airflow direction channeling conduct of flowing out from the gas reversing arrangement.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003183968A JP4280981B2 (en) | 2003-06-27 | 2003-06-27 | Cooling gas air path switching device for vacuum heat treatment furnace |
| JP183968/2003 | 2003-06-27 | ||
| JP273411/2003 | 2003-07-11 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100831847A Division CN101294772B (en) | 2003-06-27 | 2004-03-31 | Cooled gas duct changing device for vacuum heat treatment furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1813163A CN1813163A (en) | 2006-08-02 |
| CN100432610C true CN100432610C (en) | 2008-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100831847A Expired - Fee Related CN101294772B (en) | 2003-06-27 | 2004-03-31 | Cooled gas duct changing device for vacuum heat treatment furnace |
| CNB2004800182131A Expired - Fee Related CN100432610C (en) | 2003-06-27 | 2004-03-31 | Gas cooling type vacuum heat treating furnace and cooling gas direction switching device |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100831847A Expired - Fee Related CN101294772B (en) | 2003-06-27 | 2004-03-31 | Cooled gas duct changing device for vacuum heat treatment furnace |
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| Country | Link |
|---|---|
| JP (1) | JP4280981B2 (en) |
| CN (2) | CN101294772B (en) |
Cited By (1)
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| CN108026599A (en) * | 2015-09-09 | 2018-05-11 | 易普森国际有限公司 | For the equipment with cooling gas processing metal works |
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| DE102007023699B4 (en) | 2007-05-22 | 2020-03-26 | Cremer Thermoprozeßanlagen-GmbH | Hot isostatic press and method for rapid cooling of a hot isostatic press |
| CN100591778C (en) * | 2007-09-07 | 2010-02-24 | 上海中加电炉有限公司 | Heated air circulation bake oven |
| JP2010035362A (en) * | 2008-07-30 | 2010-02-12 | Mitsui Miike Mach Co Ltd | Electric motor for cooling fan of vacuum furnace |
| DE102008058330A1 (en) * | 2008-11-23 | 2010-05-27 | Dieffenbacher Gmbh + Co. Kg | Method for tempering a hot isostatic press and a hot isostatic press |
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| CN103162538B (en) * | 2013-03-22 | 2014-09-10 | 浙江固驰电子有限公司 | Rectifier bridge module sintering device |
| JP6596703B2 (en) * | 2015-03-04 | 2019-10-30 | 株式会社Ｉｈｉ | Multi-chamber heat treatment equipment |
| DE112016002361T5 (en) * | 2015-05-26 | 2018-02-22 | Ihi Corporation | HEAT TREATMENT DEVICE |
| JP6271096B2 (en) * | 2015-09-11 | 2018-01-31 | 光洋サーモシステム株式会社 | Heat treatment equipment |
| KR101909794B1 (en) * | 2016-12-29 | 2018-10-18 | 정원기 | Quenching apparatus |
| JP6938402B2 (en) * | 2018-02-22 | 2021-09-22 | 光洋サーモシステム株式会社 | Heat treatment equipment |
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| KR102551053B1 (en) * | 2021-05-12 | 2023-07-05 | 주식회사 한국제이텍트써모시스템 | Heater unit of heat treatment oven |
| CN113701501A (en) * | 2021-09-02 | 2021-11-26 | 宁波恒普真空科技股份有限公司 | Sintering furnace cooling system |
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| JP5107489B2 (en) * | 2001-05-14 | 2012-12-26 | 中外炉工業株式会社 | Gas-cooled single-chamber heat treatment furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108026599A (en) * | 2015-09-09 | 2018-05-11 | 易普森国际有限公司 | For the equipment with cooling gas processing metal works |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4280981B2 (en) | 2009-06-17 |
| CN101294772A (en) | 2008-10-29 |
| JP2005016861A (en) | 2005-01-20 |
| CN1813163A (en) | 2006-08-02 |
| CN101294772B (en) | 2012-07-18 |
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