CN112853072A - Horizontal multizone heating high vacuum tempering furnace of square single chamber - Google Patents
Horizontal multizone heating high vacuum tempering furnace of square single chamber Download PDFInfo
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- CN112853072A CN112853072A CN202011626303.6A CN202011626303A CN112853072A CN 112853072 A CN112853072 A CN 112853072A CN 202011626303 A CN202011626303 A CN 202011626303A CN 112853072 A CN112853072 A CN 112853072A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
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Abstract
The application relates to a square single-chamber horizontal multi-zone heating high-vacuum tempering furnace, which relates to the technical field of vacuum tempering furnaces and comprises a furnace body and a heating chamber arranged in the furnace body, wherein a heat insulation layer is arranged between the inner wall of the furnace body and the outer wall of the heating chamber; the furnace body is provided with a furnace door, the furnace door is provided with a heating door, the heating door is provided with a first heating assembly, one side of the heating chamber is arranged in a run-through manner, and the heating door blocks the run-through side of the heating chamber; and each inner wall of the heating chamber is connected with a second heating component. This application has every inner wall that makes the heating chamber all becomes the zone of heating to make the inside temperature distribution of heating chamber more even, and then can promote the uniformity of the performance after the work piece heating, then can promote the effect of the quality of work piece processing.
Description
Technical Field
The utility model relates to a field of vacuum tempering furnace especially relates to a horizontal multizone heating high vacuum tempering furnace in square single chamber.
Background
At present, the vacuum tempering furnace is mainly used for sintering powder metallurgy products, metal injection molding products, stainless steel bases, hard alloys, super alloys, high-specific gravity alloys, ceramic materials, magnetic materials, neodymium iron boron and the like. The saturated vapor pressure of various metal oxides is very low in vacuum, and the oxides can be promoted to be decomposed and removed, so that the surface brightness of the processed part is high, and simultaneously, the metal has very strong activity and can play a role in activating and sintering.
In the related art, a heating chamber is arranged in a vacuum annealing furnace, and a workpiece is positioned in the heating chamber to wait for heating. The heating chamber is generally only fixedly provided with one or two heating zones on the inner wall, and the heating of the heating zones heats the workpiece by heating the heating chamber to raise the temperature in the heating chamber.
When the workpiece is heated, the workpiece is heated in a fixed heating area, so that the temperature in the whole range in the area is uneven, the consistency of the performance of the machined workpiece is influenced, and the machining quality of the workpiece is reduced.
In view of the above-mentioned related art, the inventor believes that merely fixing one or two heating zones on the inner wall tends to make the temperature distribution inside the heating chamber uneven, which tends to affect the uniformity of the heated performance of the workpiece, and thus tends to degrade the quality of the workpiece.
Disclosure of Invention
In order to improve the inhomogeneous problem of the inside temperature distribution of heating chamber, this application provides a horizontal multizone heating high vacuum tempering furnace in square single chamber.
The application provides a horizontal multizone heating high vacuum tempering furnace in square single chamber adopts following technical scheme:
a square single-chamber horizontal multi-zone heating high-vacuum tempering furnace comprises a furnace body and a heating chamber arranged in the furnace body, wherein a heat insulation layer is arranged between the inner wall of the furnace body and the outer wall of the heating chamber; the furnace body is provided with a furnace door, the furnace door is provided with a heating door, the heating door is provided with a first heating assembly, one side of the heating chamber is arranged in a penetrating way, and the heating door blocks the penetrating side of the heating chamber; and each inner wall of the heating chamber is connected with a second heating assembly.
Through adopting above-mentioned technical scheme for every inner wall of heating chamber all becomes the zone of heating, makes the inside temperature distribution of heating chamber comparatively even, thereby can promote the uniformity of the performance after the work piece heating, and then can promote the quality of work piece processing. The arrangement of the heat insulation layer can reduce the high temperature conduction in the heating chamber to the furnace body, thereby reducing the temperature around the furnace body and reducing the condition that the high temperature scalds workers.
Optionally, the second heating assembly includes an installation pipe, an electric heating wire and a plurality of brackets, the brackets include an insulation part and a clamping part which are connected, the insulation part is installed on the inner wall of the heating chamber, and the clamping part is located on one side of the insulation part, which is far away from the heating chamber; the clamping part is connected with an installation pipe, and the electric heating wire is installed in the installation pipe; the installation pipe is in a continuous U-shaped structure and is paved on the inner wall of the heating chamber.
Through adopting above-mentioned technical scheme, the portion that clamps is used for the centre gripping installation pipe, and the installation pipe is used for cladding electric heating wire, carries out high temperature heating through the motor heater. The arrangement of the insulating part can prevent the current of the electric heating wire from being conducted to the heating chamber and the furnace body, thereby reducing the occurrence of short circuit of the electric heating wire. The installation pipe is of a continuous U-shaped structure, so that the inner wall of the heating chamber can be conveniently paved, and the uniformity of the temperature in the heating chamber can be conveniently improved.
Optionally, a radiation assembly is arranged on the furnace body, the radiation assembly includes a rotary driving member, an installation sleeve, a rotary shaft and an impeller, the rotary driving member is installed on the outer wall of the furnace body, and an output shaft of the rotary driving member extends into the furnace body and is connected with the rotary shaft; the installation sleeve is installed on the inner wall of the heating chamber, and the rotating shaft is inserted into the installation sleeve and is connected with the installation sleeve in a sealing mode; one end of the rotating shaft, which is far away from the rotary driving piece, extends out of the mounting sleeve and is connected with the impeller.
Through adopting above-mentioned technical scheme, the subassembly that looses is used for disturbing the gas in the heating chamber for the gas in the heating chamber can be scattered in workpiece surface, thereby can be convenient for the work piece by the even heating, promotes the uniformity of each partial performance of work piece. The rotary driving piece drives the rotary shaft to rotate, the installation sleeve and the rotary shaft are arranged in a sealing mode, hot gas in the heating chamber can be reduced from overflowing, and high temperature conduction in the heating chamber to the furnace body can be reduced conveniently. The rotation of the rotating shaft can enable the impeller to rotate, so that gas around the impeller is disturbed, and the gas around the impeller is forced to be radiated to the surface of the workpiece to heat the workpiece.
Optionally, a cooling chamber is arranged on one side, away from the oven door, of the heating chamber in the oven body, and a cooling assembly is arranged in the cooling chamber; the through hole is formed in one side, facing the cooling chamber, of the heating chamber, the sliding door assembly is connected to one side, facing the cooling chamber, of the heating chamber, and the sliding door assembly blocks the through hole.
Through adopting above-mentioned technical scheme, can open the door subassembly that moves when finishing heating, make the interior gas of heating chamber get into the cooling chamber through cooling module and cool off in, can wait that the interior temperature of heating chamber cools off and open the furnace gate again when the temperature that can accept of human body, the condition that the reduction staff was scalded by high temperature when the work piece takes place.
Optionally, the heat insulation layer adopts a heat insulation channel, and the heat insulation channel is communicated with the cooling chamber; the cooling assembly comprises a suction fan and a heat exchanger, the suction fan is arranged on the cooling chamber, and an air suction opening of the suction fan is arranged towards the through hole; the heat exchanger is arranged on the inner wall of the cooling chamber and is positioned between the air suction opening of the suction fan and the through hole.
Through adopting above-mentioned technical scheme, the setting that separates the temperature passageway both can be when heating the work piece better keep apart the high temperature of heating chamber, reduces high temperature and passes to the furnace body, also can form cooling channel with cooling chamber and heating chamber intercommunication when moving the door subassembly and opening, the faster temperature that reduces the heating chamber of being convenient for. The suction fan sucks gas in the heating chamber through the through hole, hot gas is subjected to heat exchange and temperature reduction through the heat exchanger, the cooled gas is radiated into the heat insulation channel, and the cooled gas can exchange heat with the heating chamber again in the radiation process in the heat insulation channel to reduce the temperature of the heating chamber. The gas flowing through the heat insulation channel can enter the heating chamber through the gap between the heating door and the heating chamber to wait for heat exchange again.
Optionally, the sliding door assembly comprises a lifting driving piece, the lifting driving piece is mounted on the furnace body, an output shaft of the lifting driving piece extends into the cooling chamber, an installation frame is connected to the output shaft of the lifting driving piece, a hinge rod is hinged to the inner wall of the installation frame, and the hinge rod rotates towards one side of the through hole; one end of the hinge rod, which is far away from the mounting frame, is hinged with a movable door; a guide assembly is arranged in the cooling chamber and comprises a guide plate, and the guide plate is fixed on the inner wall of the cooling chamber and is positioned on one side of the movable door, which is far away from the lifting driving piece; the guide plate is provided with a guide inclined plane towards one side of the movable door, and the height of the guide inclined plane towards one side of the heating chamber is lower than that of the guide inclined plane far away from one side of the heating chamber.
By adopting the technical scheme, the lifting driving piece can drive the mounting frame to lift, the mounting frame descends while the movable door descends, after the movable door is abutted against the guide inclined plane, when the mounting frame continues to descend, the movable door can only move towards one side of the heating chamber along the guide inclined plane under the hinge joint of the hinge rod, and therefore the movable door can block one side of the heating chamber provided with the through hole.
Optionally, the axial both sides of installing frame are provided with the leading wheel, the both sides that lie in the installing frame in the furnace body are provided with the guided way, the guided way is parallel with the axis of lift driving piece, the leading wheel inlays and sets up in the guided way and along the axial roll of guided way.
Through adopting above-mentioned technical scheme, leading wheel and guided way cooperation can provide the direction of going up and down for the installing frame when the lift driving piece drive installing frame goes up and down, and the position precision when being convenient for promote the lift of installing frame to be convenient for promote the displacement precision of floating gate.
Optionally, the cross section of the through hole is trapezoidal, and the width of the through hole at one side facing the heating chamber is smaller than that at one side far away from the heating chamber; one side of the movable door facing the heating chamber is provided with a blocking block, and the blocking block is inserted into the through hole and blocks the through hole.
Through adopting above-mentioned technical scheme, the perforating hole cross-section is trapezoidal, can lead through the outer wall of plugging block and the inner wall of perforating hole, and the plugging block of being convenient for is more accurate inserts in the perforating hole and shutoff perforating hole. Through the cooperation of shutoff piece and perforating hole, the sealed effect of promotion perforating hole that can be better can reduce the loss of the interior steam of heating chamber when the heating chamber carries out high temperature heating.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the arrangement of the first heating assembly and the second heating assembly, each inner wall of the heating chamber can be a heating area, so that the temperature distribution in the heating chamber is uniform, the consistency of the heated performance of the workpiece can be improved, and the processing quality of the workpiece can be improved;
2. through the arrangement of the heat insulation layer, the effects of reducing the temperature around the furnace body and reducing the occurrence of the condition that workers are scalded by high temperature can be achieved;
3. through the setting of the radiation subassembly and the cooling module, the effect of being convenient for uniformly heating the workpiece and uniformly cooling the heating chamber after the heating is finished can be played.
Drawings
Fig. 1 is a schematic view of the overall structure of a tempering furnace according to an embodiment of the present application.
Fig. 2 is a schematic front view structure diagram of an opening of a furnace body of a tempering furnace according to an embodiment of the present application.
Fig. 3 is a sectional view taken along line a-a of fig. 2.
Fig. 4 is a schematic view of a connection structure of the sliding door assembly and the guide assembly in fig. 3.
Description of reference numerals: 1. a furnace body; 11. a furnace door; 12. heating the door; 13. a vent hole; 14. a telescopic cylinder; 15. a sealing block; 2. a vacuum extractor; 21. an inflator; 3. a heating chamber; 31. a thermal insulation channel; 32. placing a platform; 33. a first positive electrode; 34. a first negative electrode; 35. a second positive electrode; 36. a second negative electrode; 37. a copper plate; 38. a through hole; 4. a cooling chamber; 41. a cooling assembly; 42. a suction fan; 43. a heat exchanger; 44. a thermocouple; 5. a first heating assembly; 6. a second heating assembly; 61. a support; 62. installing a pipe; 63. fixing the bolt; 64. an insulating section; 65. a clamping part; 7. a radiation assembly; 71. a drive motor; 72. installing a sleeve; 73. a rotating shaft; 74. an impeller; 8. a sliding door assembly; 81. installing a frame; 82. a hinged lever; 83. a movable door; 84. a lifting cylinder; 85. a plugging block; 9. a guide assembly; 91. a guide rail; 92. a guide plate; 93. a moving wheel; 94. a guide slope; 95. a guide wheel.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses horizontal multizone heating high vacuum tempering furnace in square single chamber. Referring to fig. 1 and 2, the square single-chamber horizontal multi-zone heating high-vacuum tempering furnace comprises a furnace body 1, a heating chamber 3 and a cooling chamber 4 which are arranged inside the furnace body 1, wherein a furnace door 11 is arranged on one side of the furnace body 1, and workpieces are placed in the heating chamber 3 through the furnace door 11 to wait for heating. The furnace body 1 is connected with a vacuumizing machine 2 and an inflator 21, before the heating chamber 3 is heated, the inside of the furnace body 1 is vacuumized through the vacuumizing machine 2, when the vacuum degree in the furnace body 1 meets a set value, nitrogen can be injected into the furnace body 1 through the inflator 21, the purity of the nitrogen can be 99.999%, and the pressure of an air source is 0.5 MPa-1.5 MPa. The workpiece can be subjected to high-temperature tempering treatment in the heating chamber 3, the cooling chamber 4 is positioned on the side of the heating chamber 3 far away from the oven door 11, and the cooling chamber 4 can be communicated with the heating chamber 3 after the heating of the heating chamber 3 is finished, so that hot air in the heating chamber 3 can be conveniently dissipated into the cooling chamber 4 to be cooled, and high-temperature scalding can be avoided when workers open the oven door 11 to take out the workpiece subjected to high-temperature tempering.
Referring to fig. 1 and 2, the side wall of the heating chamber 3 may be formed by stacking several stainless steel plates, so that the heating chamber 3 is insulated and does not generate chemical reaction due to high temperature. The side wall of the heating chamber 3 in this embodiment is formed by welding 6 stainless steel plates of 0.5mm thickness and one stainless steel plate of 2mm thickness, wherein the stainless steel plate of 2mm thickness is located at the outermost side of the heating chamber 3. A heat insulation layer is arranged between the heating chamber 3 and the inner wall of the furnace body 1, the heat insulation layer adopts a heat insulation channel 31, heat conduction to the furnace body 1 can be reduced when the heating chamber 3 is used for heating, and the heat insulation performance of the furnace body 1 is convenient to promote. The temperature insulating passage 31 may communicate with the cooling chamber 4.
Referring to fig. 1 and 2, a placing platform 32 is provided inside the heating chamber 3 at a side close to the ground, and the workpiece can be placed on the placing platform 32. The side of the furnace door 11 facing the heating chamber 3 is connected with a heating door 12, the heating door 12 is provided with a first heating assembly 5, one side of the heating chamber 3 is arranged in a penetrating way, and the heating door 12 can block the penetrating side of the heating chamber 3 when the furnace door 11 is closed, so that a closed heating space is formed in the heating chamber 3. Each inner wall department of heating chamber 3 all is connected with second heating element 6, and first heating element 5 cooperates with second heating element 6 for the heating temperature in each inside region of heating chamber 3 is more even, is convenient for promote the uniformity of each position performance after the work piece heats.
Referring to fig. 1 and 3, a telescopic cylinder 14 is connected to a side of the oven door 11 away from the heating chamber 3, a piston rod of the telescopic cylinder 14 penetrates through the oven door 11 and extends into a space between the oven door 11 and the heating door 12, a sealing block 15 is connected to the piston rod of the telescopic cylinder 14, and a vent hole 13 is formed in the heating door 12 corresponding to the sealing block 15. When the heating chamber 3 is in a heating state, the sealing block 15 is embedded at the vent hole 13; when the temperature in the heating chamber 3 needs to be cooled, the sealing block 15 can be pulled out of the vent hole 13 through the telescopic cylinder 14, so that the heating chamber 3, the temperature insulation channel 31 and the cooling chamber 4 are communicated, a cooling loop is formed conveniently, and the temperature in the heating chamber 3 is cooled as soon as possible.
Referring to fig. 1 and 2, the first heating unit 5 is identical in structure to the second heating unit 6 except for the installation position. In this embodiment, the structure of the second heating assembly 6 is taken as an example for specific explanation, the second heating assembly 6 includes a bracket 61, a plurality of mounting pipes 62 and an electric heating wire, the bracket 61 is mounted on the inner wall of the heating chamber 3, the mounting pipes 62 are supported and fixed by the bracket 61, and the mounting pipes 62 are made of steel plates and are bent into a tubular shape and wrap the electric heating wire. The installation pipe 62 is of a continuous U-shaped structure at each inner wall of the heating chamber 3 and is arranged to fully cover the inner wall of the heating chamber 3, so that each inner wall of the heating chamber 3 can be heated more uniformly. A first positive electrode 33 and a first negative electrode 34 are arranged on each side wall of the heating chamber 3, and the first positive electrode 33 and the first negative electrode 34 are connected with the electric heating wires on the corresponding side walls of the heating chamber 3. The inner wall of the furnace body 1 is provided with a second positive electrode 35 corresponding to each first positive electrode 33, and the first positive electrode 33 and the second positive electrode 35 are connected through a copper plate 37. The inner wall of the furnace body 1 is provided with a second negative electrode 36 corresponding to each first negative electrode 34, and the first negative electrode 34 and the second negative electrode 36 are also connected through a copper plate 37. The second positive electrode 35 and the second negative electrode 36 are connected with a power supply to energize the electric heating wire.
Referring to fig. 2, in order to prevent the short circuit of the electric heating wire, an insulating tube is sleeved at a position where the first positive electrode 33 and the first negative electrode 34 penetrate through the side wall of the heating chamber 3, so as to prevent the circuit from being conducted with the inner wall of the heating chamber 3. The insulating tube can adopt a ceramic tube and is high-temperature resistant. The bracket 61 comprises a fixing bolt 63, an insulating part 64 and a clamping part 65, the fixing bolt 63 is arranged in the side wall of the heating chamber 3 in a penetrating way and is in threaded connection with the heating chamber 3, one end of the fixing bolt 63 extends into the heating chamber 3 and is connected and fixed with the insulating part 64 through a steel wire, and the insulating part 64 can also be a ceramic tube. The clamping portions 65 are correspondingly mounted on the insulation portions 64, and the clamping portions are annularly sleeved on the periphery of the mounting pipe 62 and used for clamping the mounting pipe 62. The insulating part 64 keeps a certain distance between the installation pipe 62 and the side wall of the heating chamber 3, and the insulating part 64 can prevent the current of the electric heating wire from being conducted with the side wall of the heating chamber 3 to cause short circuit.
Referring to fig. 2 and 3, the furnace body 1 is provided with a radiation assembly 7, the radiation assembly 7 includes a rotary driving member, a mounting sleeve 72, a rotary shaft 73 and an impeller 74, the rotary driving member adopts a driving motor 71, the driving motor 71 is fixed on the outer wall of the furnace body 1, and an output shaft of the driving motor 71 extends into the furnace body 1. In this embodiment, the driving motor 71 is located above the placing platform 32, and the output shaft of the driving motor 71 is coaxially connected to the rotating shaft 73. The mounting sleeve 72 is fixed on the inner wall of the heating chamber 3 on the side far away from the placing platform 32, the rotating shaft 73 is inserted into the mounting sleeve 72, and a mechanical seal is arranged in the mounting sleeve 72, so that the rotating shaft 73 can be hermetically connected with the mounting sleeve 72 when rotating, and the occurrence of the situation that hot air leaks out from the gap between the rotating shaft 73 and the mounting sleeve 72 is reduced. The side of the rotating shaft 73 facing the placing platform 32 is connected with an impeller 74, and the driving motor 71 can drive the impeller 74 to rotate, so that the nitrogen in the heating chamber 3 flows and is dispersed to the surface of the workpiece, thereby improving the tempering quality of the workpiece.
Referring to fig. 3 and 4, a through hole 38 is formed in a side of the heating chamber 3 facing the cooling chamber 4, a door moving assembly 8 is connected to a side of the cooling chamber 4 facing the heating chamber 3, the through hole 38 is sealed by the door moving assembly 8 when the heating chamber 3 is heated, and when heating in the heating chamber 3 is stopped, the door moving assembly 8 is displaced so that the heating chamber 3 and the cooling chamber 4 are communicated through the through hole 38. Move a subassembly 8 and include lift driving piece, installing frame 81, articulated rod 82 and floating gate 83, the lift driving piece adopts lift cylinder 84, connects the installing frame 81 of coaxial setting on the output shaft of lift cylinder 84, and articulated at least a set of articulated rod 82 that sets up relatively on the installing frame 81, and articulated rod 82 is located two frame posts of the vertical setting of installing frame 81, and articulated rod 82 is located the relative lateral wall that sets up of two frame posts. Two sets of hinge rods 82 are provided in the present embodiment, and the hinge rods 82 are rotatably provided toward the heating chamber 3 side. The side of the hinge rod 82 away from the mounting frame 81 is hinged with a movable door 83, a blocking block 85 is correspondingly arranged on one side of the movable door 83 facing the through hole 38, and the blocking block 85 is inserted into the through hole 38 and is arranged for blocking the through hole 38. The cross sections of the through hole 38 and the blocking block 85 are both trapezoidal, so that the blocking block 85 can be guided and positioned through the outer wall of the blocking block 85 and the inner wall of the through hole 38 when being inserted into the through hole 38.
Referring to fig. 3 and 4, a guide assembly 9 is disposed in the cooling chamber 4, the guide assembly 9 includes guide rails 91 located at both ends of the mounting frame 81 in the width direction and a guide plate 92 fixed between the two guide rails 91, both ends of the guide rails 91 in the length direction are welded to the inner wall of the cooling chamber 4, and the axes of the guide rails 91 are parallel to the axis of the lifting cylinder 84. Guide wheels 95 are arranged at two ends of the mounting frame 81 in the width direction, and the guide wheels 95 are embedded in the guide rails 91 and arranged in a rolling manner along the axial direction of the guide rails 91. A moving wheel 93 is connected to a side of the moving door 83 remote from the elevating cylinder 84, and the guide plate 92 is located below the moving wheel 93. The guide plate 92 is provided with a guide slope 94 on the side facing the moving door 83, and the height of the guide slope 94 on the side facing the heating chamber 3 is lower than that of the guide slope 94 on the side away from the heating chamber 3.
When the movable door 83 is closed, the mounting frame 81 is driven by the lifting cylinder 84 to displace toward the guide plate 92, and after the movable wheel 93 abuts against the guide inclined surface 94, the mounting frame 81 can only move downward under the guide restriction of the guide wheel 95 and the guide rail 91, and the movable wheel 93 can move toward the heating chamber 3 side under the guide of the guide inclined surface 94, and the movable door 83 can displace toward the heating chamber 3 side along with the movable wheel 93 under the hinge of the hinge rod 82 until the blocking block 85 blocks the through hole 38.
Referring to fig. 3, a cooling unit 41 is provided in the cooling chamber 4, and when the door moving unit 8 is opened, the cooling unit 41 cools the nitrogen gas introduced into the cooling chamber 4, thereby cooling the temperature in the heating chamber 3. The cooling assembly 41 includes a suction fan 42 and a heat exchanger 43, the suction fan 42 is installed on the side of the cooling chamber 4 away from the heating chamber 3, and a suction opening of the suction fan 42 is disposed toward the through hole 38. The heat exchanger 43 is installed at the inner wall of the cooling chamber 4 between the suction opening of the suction fan 42 and the through hole 38. Cooling water is introduced into the heat exchanger 43, the water supply pressure of the cooling water is 0.2MPa, and the water temperature is lower than 25 ℃. The suction fan 42 sucks nitrogen in the heating chamber 3 through the through hole 38, the nitrogen can exchange heat with the heat exchanger 43 to be cooled when entering the cooling chamber 4, the primarily cooled nitrogen can penetrate through the fins of the heat exchanger 43 to enter the heat insulation channel 31, the nitrogen can be secondarily cooled when passing through the fins of the heat exchanger 43, and the cooling effect is better. When the nitrogen gas is filled in the heat insulation channel 31, the inner wall of the furnace body 1 and the outer wall of the heating chamber 3 can be cooled. The nitrogen gas in the thermal insulation passage 31 can enter the heating chamber 3 through the vent hole 13, and a cooling cycle of the nitrogen gas is formed. A plurality of thermocouples 44 are arranged on the furnace body 1, the thermocouples 44 extend into the heating chamber 3 and the cooling chamber 4, and the temperature in the furnace body 1 is monitored in real time. Four thermocouples 44 may be provided in this embodiment.
The implementation principle of the horizontal multizone heating high vacuum tempering furnace of square single chamber of this application embodiment is: when the workpiece is subjected to high-temperature tempering treatment, firstly, the workpiece is placed on the placing platform 32, and then the oven door 11 is closed, and the vent hole 13 and the through hole 38 are not blocked. Next, the furnace body 1 is evacuated, and the degree of vacuum in the furnace body 1 is determined according to the kind and material of the workpiece. When the furnace body 1 reaches a predetermined degree of vacuum, nitrogen gas is charged into the furnace body 1 through the inflator 21. When the nitrogen gas is stopped to be filled, the inflator 21 is separated from the furnace body 1, and the inflation inlet of the furnace body 1 is blocked. Then, starting the telescopic cylinder 14 to enable the sealing block 15 to move towards one side of the vent hole 13 until the sealing block 15 blocks the vent hole 13, and stopping the telescopic cylinder 14 from extending and retracting; the elevation cylinder 84 is started to displace the blocking block 85 toward the through hole 38 until the blocking block 85 blocks the through hole 38, and the piston rod of the elevation cylinder 84 stops extending and contracting.
Then, the power supply is started to electrify and heat the electric heating wire, and as six inner wall surfaces of the heating chamber 3 are heated, the temperature of each area in the heating chamber 3 is uniform, and the workpiece is heated uniformly. The driving motor 71 is started to drive the impeller 74 to rotate, and the impeller 74 blows nitrogen in the heating chamber 3 to continuously disperse the nitrogen to the surface of the workpiece, so that the heating efficiency and the tempering quality of the workpiece are improved.
After the workpiece is tempered, the power supply of the driving motor 71 and the electric heating wire is cut off, then the telescopic cylinder 14 is started to drive the sealing block 15 to be separated from the vent hole 13, and the lifting cylinder 84 is started to drive the blocking block 85 to be separated from the through hole. Cooling water is continuously introduced into a water inlet of the heat exchanger 43, then the suction fan 42 is started, so that nitrogen in the heating chamber 3 is forced to flow to the suction fan 42 through the heat exchanger 43 through the through hole, the nitrogen flowing to the suction fan 42 enters the heat insulation channel 31 through the fin of the heat exchanger 43, then enters the heating chamber 3 through the vent hole 13, and the temperature in the furnace body 1 is lower than 40 ℃ through repeated air suction and cooling circulation. And finally, closing the suction fan 42, opening the furnace door 11, standing for 3-5 minutes, and providing time for the nitrogen in the furnace body 1 to be discharged out of the furnace body 1 and air to enter the furnace body 1. And then taking out the workpiece, and finishing the high-temperature tempering treatment work of the workpiece.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a horizontal multizone heating high vacuum tempering furnace in square single chamber which characterized in that: the furnace comprises a furnace body (1) and a heating chamber (3) arranged in the furnace body (1), wherein a heat insulation layer is arranged between the inner wall of the furnace body (1) and the outer wall of the heating chamber (3); the furnace body (1) is provided with a furnace door (11), the furnace door (11) is provided with a heating door (12), the heating door (12) is provided with a first heating assembly (5), one side of the heating chamber (3) is arranged in a penetrating way, and the heating door (12) blocks the penetrating side of the heating chamber (3); and each inner wall of the heating chamber (3) is connected with a second heating assembly (6).
2. The horizontal multi-zone heating high vacuum tempering furnace of claim 1, characterized in that: the second heating assembly (6) comprises an installation pipe (62), an electric heating wire and a plurality of brackets (61), each bracket (61) comprises an insulation part (64) and a clamping part (65) which are connected, the insulation parts (64) are installed on the inner wall of the heating chamber (3), and the clamping parts (65) are located on one side, away from the heating chamber (3), of each insulation part (64); the clamping part (65) is connected with an installation pipe (62), and the electric heating wire is installed in the installation pipe (62); the installation pipe (62) is in a continuous U-shaped structure and is paved on the inner wall of the heating chamber (3).
3. The horizontal multi-zone heating high vacuum tempering furnace of claim 1, characterized in that: the furnace body (1) is provided with a radiation assembly (7), the radiation assembly (7) comprises a rotary driving part, an installation sleeve (72), a rotating shaft (73) and an impeller (74), the rotary driving part is installed on the outer wall of the furnace body (1), and an output shaft of the rotary driving part extends into the furnace body (1) and is connected with the rotating shaft (73); the mounting sleeve (72) is mounted on the inner wall of the heating chamber (3), and the rotating shaft (73) is inserted into the mounting sleeve (72) and is connected with the mounting sleeve (72) in a sealing manner; one end of the rotating shaft (73) far away from the rotating driving part extends out of the mounting sleeve (72) and is connected with the impeller (74).
4. The horizontal multi-zone heating high vacuum tempering furnace of claim 1, characterized in that: a cooling chamber (4) is arranged on one side, away from the furnace door (11), of the heating chamber (3) in the furnace body (1), and a cooling assembly (41) is arranged in the cooling chamber (4); one side of the heating chamber (3) facing the cooling chamber (4) is provided with a through hole (38), one side of the heating chamber (3) facing the cooling chamber (4) is connected with a sliding door assembly (8), and the sliding door assembly (8) is used for plugging the through hole (38).
5. The horizontal multi-zone heating high vacuum tempering furnace of claim 4, wherein: the heat insulation layer adopts a heat insulation channel (31), and the heat insulation channel (31) is communicated with the cooling chamber (4); the cooling assembly (41) comprises a suction fan (42) and a heat exchanger (43), the suction fan (42) is installed on the cooling chamber (4), and a suction opening of the suction fan (42) is arranged towards the through hole (38); the heat exchanger (43) is arranged on the inner wall of the cooling chamber (4) and is positioned between the suction opening of the suction fan (42) and the through hole (38).
6. The horizontal multi-zone heating high vacuum tempering furnace of claim 4, wherein: the sliding door assembly (8) comprises a lifting driving piece, the lifting driving piece is mounted on the furnace body (1), an output shaft of the lifting driving piece extends into the cooling chamber (4), an installation frame (81) is connected onto the output shaft of the lifting driving piece, a hinge rod (82) is hinged to the inner wall of the installation frame (81), and the hinge rod (82) rotates towards one side of the through hole; one end of the hinge rod (82) far away from the mounting frame (81) is hinged with a movable door (83); a guide assembly (9) is arranged in the cooling chamber (4), the guide assembly (9) comprises a guide plate (92), and the guide plate (92) is fixed on the inner wall of the cooling chamber (4) and is positioned on one side, away from the lifting driving piece, of the movable door (83); the guide plate (92) is provided with a guide inclined surface (94) towards one side of the movable door (83), and the height of the guide inclined surface (94) towards one side of the heating chamber (3) is lower than that of the guide inclined surface (94) away from the heating chamber (3).
7. The horizontal multi-zone heating high vacuum tempering furnace of claim 6, wherein: installing frame (81) axial both sides are provided with leading wheel (95), the both sides that lie in installing frame (81) in furnace body (1) are provided with guided way (91), guided way (91) are parallel with the axis of lift driving piece, leading wheel (95) inlay in guided way (91) and along the axial roll setting of guided way (91).
8. The horizontal multi-zone heating high vacuum tempering furnace of claim 6, wherein: the cross section of the through hole (38) is trapezoidal, and the width of one side of the through hole (38) facing the heating chamber (3) is smaller than that of one side far away from the heating chamber (3); one side of the movable door (83) facing the heating chamber (3) is provided with a blocking block (85), and the blocking block (85) is inserted into the through hole (38) and blocks the through hole (38).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011626303.6A CN112853072A (en) | 2020-12-31 | 2020-12-31 | Horizontal multizone heating high vacuum tempering furnace of square single chamber |
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| CN202011626303.6A CN112853072A (en) | 2020-12-31 | 2020-12-31 | Horizontal multizone heating high vacuum tempering furnace of square single chamber |
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| CN112853072A true CN112853072A (en) | 2021-05-28 |
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| CN116970784A (en) * | 2023-09-22 | 2023-10-31 | 江苏金色工业炉股份有限公司 | Pre-chamber slow-cooling type high-temperature tempering furnace |
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