CN113957223B - Box-type heating furnace for heat treatment - Google Patents
Box-type heating furnace for heat treatment Download PDFInfo
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- CN113957223B CN113957223B CN202111067344.0A CN202111067344A CN113957223B CN 113957223 B CN113957223 B CN 113957223B CN 202111067344 A CN202111067344 A CN 202111067344A CN 113957223 B CN113957223 B CN 113957223B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 53
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 30
- 230000007246 mechanism Effects 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 7
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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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
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
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- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a box-type heating furnace for heat treatment, and belongs to the technical field of heat treatment equipment. Comprises a furnace body, a furnace door and a lifting device; the lifting device comprises a chain lifting structure, a door type bracket and two elastic positioning structures, and the furnace door is arranged on the door type bracket in a vertically sliding manner; when the furnace door is positioned at the upper part of the door type bracket, the furnace door is positioned above the furnace body. Two sliding plates are arranged in front of and behind the inner side of the vertical beam of the door type support, two pulley blocks are arranged on the left side and the right side of the furnace door in parallel, two notches are arranged on the rear sliding plates in parallel, and two furnace door closing structures are arranged on the left side and the right side of the furnace body in parallel and correspond to the notches; when the furnace door is positioned at the lower part of the door type bracket, the furnace door is positioned right in front of the furnace body, the bottom of the furnace door is propped against the elastic positioning structure, and the furnace door can move backwards; at this time, the pulley block is positioned right in front of the corresponding notch, the furnace door closing structure pushes the furnace door to move backwards, the pulley block moves backwards from the corresponding notch, and the furnace door seals the furnace body.
Description
Technical Field
The invention belongs to the technical field of heat treatment equipment, and particularly relates to a box-type heating furnace for heat treatment.
Background
Heat treatment refers to a metal hot working process in which a material is heated, held and cooled in a solid state to achieve a desired texture and properties. The method comprises the processes of quenching, cooling, tempering and the like, wherein in the prior art, products are sent to a quenching furnace, a tempering furnace, a cooling tank and the like for treatment by a movable forklift. The quenching furnace and the tempering furnace can be box-type heating furnaces.
The furnace door of the existing box-type heating furnace can be a unscrewed furnace door or a lifting furnace door, etc. The utility model discloses a box resistance heating furnace for metal heat treatment processing, which comprises a base plate, the equal fixedly connected with installation piece in both sides of bottom plate bottom, two the equal fixedly connected with of bottom of installation piece removes the wheel, one side fixedly connected with brake valve at removal wheel top, the equal fixedly connected with of both sides at bottom plate top down the extension board, two the equal fixedly connected with pneumatic cylinder in top of extension board down, the extension board is gone up to the top fixedly connected with of pneumatic cylinder output shaft, go up the bottom of extension board and be located the fixed surface of pneumatic cylinder between the top of extension board and be located the flexible support of fixed surface, go up the equal fixedly connected with buffering supporting shoe in both sides at extension board bottom and the both sides at extension board top down, go up the top fixedly connected with vacuum insulation board of extension board, the top fixedly connected with oven of vacuum insulation board. The surface of the oven box is hinged with a box door through a hinge, one side of the box door is fixedly connected with a Gao Wenmen plug, adsorption blocks are arranged around one side of the box door, and the other side of the box door is fixedly connected with a handle. For large workpieces, the unscrewed oven door is not easy to operate and is inconvenient to arrange a feeding slide rail in front of the box-type heating oven. The patent with the application number of CN89219031.0 discloses a novel box-type resistance furnace which consists of a furnace base, a furnace body, a furnace door lifting mechanism, heating resistance wires and heat insulation materials arranged in the furnace body and a trolley capable of moving along a guide rail. The furnace door consists of a steel plate, ribs are arranged on the inner side of the furnace door and tightly plug aluminum silicate fiber heat insulation materials, the furnace door lifting mechanism is a lifting mechanism which moves towards the furnace body and stably lifts, the mechanism can be formed by matching two guide wheels respectively arranged on two sides of the furnace door with groove-shaped guide rails which are arranged on two sides of the furnace door and provided with grooves turning towards the side of the furnace body and arc-shaped grooves, the grooves are arranged on guide rail surfaces parallel to the furnace door, and the arc-shaped grooves are arranged on surfaces of the guide rails and perpendicular to the surfaces of the grooves. The structure is inconvenient for automatic control, has poor sealing effect and consumes more energy.
Disclosure of Invention
In order to solve the problems, the embodiment of the invention provides a box-type heating furnace for heat treatment, which is convenient for automatically controlling a furnace door, has good sealing effect on the heating furnace and saves more energy. The technical scheme is as follows:
the embodiment of the invention provides a box-type heating furnace for heat treatment, which comprises a furnace body 1, a furnace door 2 capable of lifting and lowering the front side of the furnace body 1 and a lifting device for driving the furnace door 2 to lift and lower; the lifting device comprises a chain lifting structure, a door type support 3 in front of the furnace body 1 and two elastic positioning structures 4 at the bottom of the door type support 3, wherein the two elastic positioning structures 4 are arranged side by side left and right and are positioned right below the furnace door 2, and the furnace door 2 is arranged on the door type support 3 in a vertically sliding manner; when the furnace door 2 is positioned at the upper part of the door type bracket 3, the furnace door is positioned above the furnace body 1; when the furnace door 2 is positioned at the lower part of the door type bracket 3, the furnace door is positioned right in front of the furnace body 1, the bottom of the furnace door is propped against the elastic positioning structure 4, and the furnace door can move backwards; the door type bracket 3 comprises two vertical beams 31 which are arranged side by side left and right and a top beam 32 which is arranged between the top ends of the two vertical beams 31 and along the left and right direction, the furnace door 2 is arranged between the two vertical beams 31, and a chain lifting structure is arranged between the top of the furnace door 2 and the top beam 32; the inside of the vertical beam 31 is provided with two sliding plates 5 in a front-back side-by-side manner, the sliding plates 5 are arranged in a left-right direction, two pulley blocks 6 are arranged in an up-down side-by-side manner on the left side and the right side of the furnace door 2, two notches 7 for the two pulley blocks 6 to pass through are arranged in an up-down side-by-side manner on the lower part of the rear sliding plate 5, the pulley blocks 6 comprise transverse pulleys 61 arranged in a front-back direction and longitudinal pulleys 62 arranged in a left-right direction, the transverse pulleys 61 and the longitudinal pulleys 62 are arranged in an up-down side-by-side manner, the outer sides of the transverse pulleys 61 are arranged on the inside of the vertical beam 31 in a sliding manner, and the longitudinal pulleys 62 are positioned between the two sliding plates 5 and are arranged on the sliding plates 5 on the corresponding sides in a front-back side and a sliding manner; when the furnace door 2 is positioned at the lower part of the door type bracket 3, the pulley block 6 is positioned right in front of the corresponding notch 7; two furnace door closing structures 8 are arranged on the left side and the right side of the furnace body 1 and correspond to the notch 7 in an up-down side-by-side manner, two sliding grooves 9 are arranged on the left side and the right side of the furnace door 2 and located behind the pulley block 6 in an up-down side-by-side manner, the two sliding grooves 9 are vertically arranged and respectively correspond to the two furnace door closing structures 8 on the corresponding sides, the furnace door closing structures 8 comprise swing arms arranged in the left-right direction, ball heads at the inner ends of the swing arms and pushing mechanisms on the side walls of the furnace body 1, the middle parts of the swing arms are hinged to the front sides of the left side wall and the right side wall of the furnace body 1, and the pushing mechanisms are arranged between the outer ends of the swing arms and the side walls on the corresponding sides of the furnace body 1; when the furnace door 2 is positioned at the upper part of the door type bracket 3, the ball head is positioned right below the chute 9; when the furnace door 2 moves downwards, the ball head can be embedded into the corresponding chute 9; the pushing mechanism can enable the ball head to move backwards to push the furnace door 2 to move backwards, the pulley blocks 6 move backwards from the corresponding notches 7, and the furnace door 2 seals the furnace body 1.
Wherein, the rear inner wall, the left inner wall and the right inner wall of the furnace body 1 in the embodiment of the invention are provided with heating elements 10, the upper inner wall is provided with a circulating fan 11, the rear outer wall is provided with a nitrogen supply structure 12, the top of the furnace body is provided with an exhaust port 13, the installation part surrounding the circulating fan 11 is provided with a water cooling jacket, and the left inner wall and the right inner wall are provided with a plurality of nitrogen air injection holes; the inner wall of the furnace door is also provided with a heating element 10, the nitrogen supply structure 12 is also provided with a water cooling jacket, the nitrogen supply structure 12 is connected with a nitrogen jet hole through an air pipe at the top of the furnace body 1, the water cooling jacket is connected with a cold water supply structure through a water pipe at the top of the furnace body 1, and the inner wall of the furnace door 2 is provided with a boss matched with an opening at the front side of the furnace body 1.
Further, the box-type heating furnace provided by the embodiment of the invention further comprises a workpiece support 14 in the furnace body 1 for placing a workpiece and a feeding slide rail 15 arranged in front of the furnace body 1 and along the front-back direction, wherein a strip-shaped notch matched with a fork of a movable forklift is arranged on the upper side of the workpiece support 14 along the front-back direction, and the feeding slide rail 15 can enable the movable forklift to slide and enable the movable forklift to send the workpiece to the workpiece support 14; the strip-shaped notch is a plurality of rectangular grooves which can be inserted backwards and move upwards by the feeding fork, the rectangular grooves are arranged side by side left and right, and a plurality of hollowed-out holes are formed in the left side wall and the right side wall of the rectangular grooves.
The chain lifting structure comprises two chains 16, a weight 17 capable of moving up and down on the right side of a door bracket 3, a lifting motor 18 on the upper part of the door bracket 3, two guide chain wheels 19 arranged on a top beam 32 in a left-right side-by-side manner, a driving shaft 20 arranged on the right side of the top beam 32 in a front-back direction and two driving chain wheels 21 arranged on the driving shaft 20 in a front-back side-by-side manner, wherein two chain fixing pieces are arranged on the top of a furnace door 2 in the left-right side-by-side manner, the two guide chain wheels 19 are respectively positioned right above the two chain fixing pieces, and the driving shaft 20 is in transmission connection with the lifting motor 18; one end of the chain 16 is connected with a corresponding chain fixing piece, and then vertically upwards reaches the left side of a corresponding guide chain wheel 19, bypasses the upper side of the corresponding guide chain wheel 19 and horizontally winds out to the right, bypasses the upper side of a corresponding driving chain wheel 21 and winds out downwards from the right side of the corresponding driving chain wheel 21, and the other end is connected with the weight 17; the two chains 16 bypass the two drive sprockets 21, respectively, and are connected at their other ends to the weights 17.
Preferably, a fixed bracket 22 is arranged on the front side of the top of the furnace body 1 in the embodiment of the invention, the fixed bracket 22 is fixedly connected with the door type bracket 3, a driving sprocket is arranged at the rear part of the driving shaft 20, and the lifting motor 18 is arranged on the top of the fixed bracket 22 along the front-back direction and is in transmission connection with the driving sprocket through a transmission chain; the right end of back timber 32 extends right and its downside is equipped with vertical support 23 along vertical direction for the vertical beam 31 on right side, vertical support 23 is located the adjacent left side of pouring weight 17 and all is equipped with polylith guide board 24 from top to bottom side by side in its front and back both sides, guide board 24 sets up along controlling, and the guide board 24 of both sides is located the adjacent place ahead and the adjacent rear of pouring weight 17 respectively.
Specifically, the pushing mechanism in the embodiment of the invention is an electric push rod arranged along the front-back direction, the electric push rod is hinged on the outer wall of the corresponding side of the furnace body 1, and the front end of the telescopic rod is hinged with the outer end of the swing arm; the four pushing mechanisms are synchronously driven and distributed in a rectangular shape, and the lower end of the sliding chute 9 is a horn mouth with a small upper part and a large lower part.
Wherein, in the pulley block 6 below in the embodiment of the present invention, the longitudinal pulley 62 is located below the transverse pulley 61; the elastic positioning structure 4 is located right below the longitudinal pulley 62 on the corresponding side, can elastically stretch in the vertical direction, and is fixed on the inner side of the vertical beam 31 on the corresponding side; when the furnace door 2 is positioned at the lower part of the door type bracket 3, the longitudinal pulley 62 is propped against the top of the elastic positioning structure 4, and when the furnace door 2 moves forwards and backwards, the longitudinal pulley 62 always slides on the top of the elastic positioning structure 4.
Further, the upper part of the left vertical beam 31 in the embodiment of the invention is provided with a furnace door fixing structure 25, the furnace door fixing structure 25 comprises a lock pin penetrating the vertical beam 31 along the left-right direction and a fixing driving mechanism for driving the lock pin to move left-right, and when the furnace door 2 is positioned at the upper part of the door bracket 3, the lock pin is positioned below the upper pulley block 6 adjacently; in the upper pulley block 6, the transverse pulley 61 is positioned below the longitudinal pulley 62; when the furnace door 2 is fixed, the lock pin moves inwards, and the transverse pulley 61 of the upper pulley block 6 is propped against the upper side of the lock pin to fix the furnace door 2; when the furnace door 2 is not fixed, the lock pin moves outwards to the outer side of the pulley block 6.
Preferably, the front side of the left vertical beam 31 in the embodiment of the invention is provided with an L-shaped guide plate 26, the front side of the left end of the furnace door 2 is provided with a straight guide plate 27 along the front-back direction, and the L-shaped guide plate 26 and the straight guide plate 27 are vertically arranged; the transverse arms of the L-shaped guide plates 26 are arranged along the left-right direction, are positioned in front of the straight guide plates 27, and the outer ends of the transverse arms are fixed on the vertical beams 31; the longitudinal arms of the L-shaped guide plate 26 are arranged in the front-rear direction, which is located at the rear side of the inner ends of the transverse arms, which are located in front of the oven door 2, which are located adjacent to the inner sides of the straight guide plates 27.
Four position sensors 28 are arranged on the left vertical beam 31 in the embodiment of the invention in parallel from top to bottom, the four position sensors 28 are a first position sensor, a second position sensor, a third position sensor and a fourth position sensor in sequence from top to bottom, the first position sensor is located above the notch 7, the second position sensor is located at the notch 7, the third position sensor is located between the notch 7 and the notch 7, and the fourth sensor is located at the elastic locating structure 4.
The technical scheme provided by the embodiment of the invention has the beneficial effects that: the embodiment of the invention provides a box-type heating furnace for heat treatment, which adopts a lifting structure, wherein a furnace door descends to the right front of a furnace body, and is pushed backwards to be closed by four furnace door closing structures; the structure is convenient for automatically controlling the furnace door, and the furnace door has good sealing effect on the heating furnace and is more energy-saving.
Drawings
Fig. 1 is a schematic view showing a structure of a box-type heating furnace for heat treatment according to an embodiment of the present invention;
fig. 2 is a sectional view of a box-type heating furnace for heat treatment provided by an embodiment of the present invention;
fig. 3 is a plan view of a box-type heating furnace for heat treatment according to an embodiment of the present invention.
In the figure: 1 furnace body, 2 furnace door, 3 door type support, 4 elastic positioning structure, 5 slide, 6 pulley block, 7 breach, 8 furnace door closing structure, 9 spout, 10 heating piece, 11 circulating fan, 12 nitrogen gas supply structure, 13 gas vent, 14 work piece support, 15 pay-off slide rail, 16 chain, 17 pouring weight, 18 elevator motor, 19 guide sprocket, 20 drive shaft, 21 driving sprocket, 22 fixed bolster, 23 vertical support, 24 guide board, 25 furnace door fixed knot constructs, 26L shape deflector, 27 straight deflector, 28 position sensor, 31 vertical beam, 32 back timber, 61 transverse pulley, 62 longitudinal pulley.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.
Referring to fig. 1 to 3, an embodiment of the present invention provides a box-type heating furnace for heat treatment, comprising a furnace body 1, a furnace door 2 which is arranged at the front side of the furnace body 1 and can be lifted, a lifting device for driving the furnace door 2 to lift, etc.; the furnace body 1 is in a rectangular box structure, the inner wall of the furnace body is provided with an insulating layer, and the front side of the furnace body is open. The lifting device comprises a chain lifting structure, a door type support 3 (arranged along the left and right directions) in front of the furnace body 1, two elastic positioning structures 4 (arranged vertically) at the bottom of the door type support 3 and the like, wherein the two elastic positioning structures 4 are arranged side by side left and right and are positioned under the furnace door 2, and the furnace door 2 can be arranged on the door type support 3 in a vertical sliding manner. When the furnace door 2 is positioned at the upper part of the door type bracket 3, the furnace door is positioned above the furnace body 1. When the furnace door 2 is positioned at the lower part of the door type bracket 3, the furnace door is positioned right in front of the furnace body 1, the bottom of the furnace door is propped against the elastic positioning structure 4, and the furnace door can move backwards; the box-type heating furnace is closed by cooperating with the furnace door closing structure 8. The door type bracket 3 comprises two vertical beams 31 which are arranged side by side left and right and a top beam 32 which is arranged along the left-right direction between the top ends of the two vertical beams 31, the vertical beams 31 are arranged in front of the corresponding sides (left side and right side) of the furnace body 1, the furnace door 2 is arranged between the two vertical beams 31, and a chain lifting structure is arranged between the top of the furnace door 2 and the top beam 32 and used for driving the furnace door 2 to move up and down. The inboard of vertical beam 31 is equipped with two slide 5 (vertical setting, slide 5 and the slide 5 at rear including the place ahead about, slide 5 along controlling to setting up, and the left and right sides of furnace gate 2 all is equipped with two assembly pulleys 6 side by side from top to bottom (including assembly pulley 6 of top and assembly pulley 6 of below), and the lower part of slide 5 at rear is equipped with two breach 7 (including breach 7 of top and breach 7 of below) that supply two assembly pulleys 6 to pass backward from top to bottom respectively side by side, and two breach 7 correspond with two assembly pulleys 6 of corresponding side respectively. The pulley block 6 includes a transverse pulley 61 disposed in the front-rear direction and a longitudinal pulley 62 disposed in the left-right direction, the transverse pulley 61 and the longitudinal pulley 62 are disposed side by side up and down, the outer side of the transverse pulley 61 (between the two sliding plates 5) is slidably disposed on the inner side of the vertical beam 31, and the longitudinal pulley 62 is disposed between the two sliding plates 5 and the front-rear sides thereof are slidably disposed on the sliding plates 5 on the corresponding sides. When the furnace door 2 is positioned at the lower part of the door type bracket 3, the pulley block 6 is positioned right in front of the corresponding notch 7. The furnace body 1 is equipped with two furnace gate closing structure 8 (including the furnace gate closing structure 8 of top and the furnace gate closing structure 8 of below) from top to bottom about the both sides and corresponding breach 7 department, and the left and right sides of furnace gate 2 just is located the rear of assembly pulley 6 and all is equipped with two spouts 9 from top to bottom side by side (including spout 9 of top and spout 9 of below, the left and right sides of furnace gate 2 also can all only set up two furnace gate closing structure 8 of a spout 9 simultaneous correspondence homonymy, and two spouts 9 all vertically set up and it corresponds with two furnace gate closing structure 8 of correspondence side respectively. The furnace door closing structure 8 comprises a swing arm arranged along the left and right directions, a ball head at the inner end of the swing arm, a pushing mechanism on the side wall of the furnace body 1 and the like, wherein the middle part of the swing arm is hinged (can rotate around a vertical rotating shaft and can also move left and right according to the requirement) on the front side of the left and right side walls of the furnace body 1, and the pushing mechanism is arranged between the outer end of the swing arm and the side wall of the corresponding side of the furnace body 1. When the furnace door 2 is positioned at the upper part of the door type bracket 3, the ball head is positioned right below the chute 9. When the furnace door 2 moves downwards, the ball head can be embedded into the corresponding chute 9. The pushing mechanism can enable the ball head to move backwards to push the furnace door 2 to move backwards, the pulley blocks 6 move backwards from the corresponding notches 7, and the furnace door 2 seals the furnace body 1. Specifically, when the oven door 2 is located at the lower part of the door bracket 3, the upper pulley block 6 is located right in front of the upper notch 7, the lower pulley block 6 is located right in front of the lower notch 7, the ball head of the upper oven door closing structure 8 is located in the upper chute 9, and the ball head of the lower oven door closing structure 8 is located in the lower chute 9. The notch 7 in this embodiment is a rectangular notch, and the length of the notch in the up-down direction is greater than the length of the pulley set 6, so as to ensure that the oven door 2 can move back and forth.
Referring to fig. 1-3, the rear inner wall, the left inner wall and the right inner wall of the furnace body 1 in the embodiment of the invention are provided with heating elements 10, a circulating fan 11 (vertically arranged to ensure uniform heat) is arranged on (the middle part of) the upper inner wall, a nitrogen supply structure 12 is arranged on the rear outer wall, an exhaust port 13 is arranged on the top of the rear outer wall, a water cooling jacket is arranged on the top of the rear outer wall and around the installing position of the circulating fan 11 (to avoid overheat damage of a motor of the circulating fan 11), and a plurality of nitrogen spraying holes are arranged on the left inner wall and the right inner wall. The inner wall of the furnace door is also provided with a heating element 10, the nitrogen supply structure 12 is also provided with a water cooling jacket (avoiding overheat damage of the nitrogen supply structure 12), the nitrogen supply structure 12 is connected with a nitrogen jet hole through an air pipe at the top of the furnace body 1, the water cooling jacket is connected with a cold water supply structure through a water pipe (comprising a cold water inlet pipe and a hot water outlet pipe) at the top of the furnace body 1, and the inner wall of the furnace door 2 is provided with a boss matched with an opening at the front side of the furnace body 1 so as to ensure the sealing effect; when the furnace door 2 is closed, the boss is embedded into the front side of the furnace body 1.
Further, referring to fig. 1-3, the box-type heating furnace provided by the embodiment of the invention further includes a workpiece support 14 (specifically, a rectangular plate disposed along a front-rear direction) in the furnace body 1 and used for placing a workpiece, and a feeding slide rail 15 (formed by two slide rails disposed side by side in a left-right direction and disposed on left and right sides of the furnace body 1), wherein a bar-shaped notch matched with a fork of a moving forklift is disposed on an upper side of the workpiece support 14 along the front-rear direction, and the feeding slide rail 15 can enable the moving forklift to slide and enable the moving forklift to send the workpiece to the workpiece support 14. The strip-shaped notch is a plurality of (two in particular) rectangular grooves which can be inserted backwards and move upwards by the feeding fork, the rectangular grooves are arranged side by side left and right, and a plurality of hollowed-out holes are formed in the left side wall and the right side wall of the rectangular grooves so as to ensure that the feeding fork is heated uniformly.
Referring to fig. 1-3, the chain lifting structure in the embodiment of the invention includes two chains 16, a weight 17 on the right side of the door bracket 3 and capable of moving up and down, a lifting motor 18 on the upper portion of the door bracket 3, two guide sprockets 19 arranged side by side on the top beam 32, a driving shaft 20 (rotating arrangement) on the right side of the top beam 32 and arranged along the front-back direction, two driving sprockets 21 arranged side by side on the front portion of the driving shaft 20, and the like, two chain fixing pieces are arranged side by side on the top of the oven door 2, the two guide sprockets 19 are respectively located right above the two chain fixing pieces, and the driving shaft 20 is in transmission connection with the lifting motor 18. One end of the chain 16 is connected with the corresponding chain fixing member, and then vertically upwards to the left side of the corresponding guide sprocket 19, bypasses the upper side of the corresponding guide sprocket 19 and horizontally winds out to the right, bypasses the upper side of the corresponding driving sprocket 21 and winds out downwards from the right side of the corresponding driving sprocket 21, and the other end is connected with the weight 17. The two chains 16 respectively bypass the two drive sprockets 21, respectively bypass the two guide sprockets 19, and the other ends thereof are connected to the weight 17. The two chain fixtures on the oven door 2 may be slightly staggered back and forth, and correspondingly, the two guide sprockets 19 may be slightly staggered back and forth to correspond to the two drive sprockets 21.
Preferably, referring to fig. 1 to 3, a fixing bracket 22 is provided at the front side of the top of the furnace body 1 in the embodiment of the present invention, the fixing bracket 22 is fixedly connected with a door type bracket 3 (a vertical beam 31 and a top beam 32), a driving sprocket is provided at the rear of the driving shaft 20, and a lifting motor 18 is provided at the top of the fixing bracket 22 in the front-rear direction and is in driving connection with the driving sprocket through a driving chain. The right end of the top beam 32 extends rightward relative to the vertical beam 31 on the right side, and the lower side of the top beam extends in the vertical direction, a vertical support 23 is arranged on the lower side of the vertical support 23, the vertical support 23 is located on the adjacent left side of the weight 17, a plurality of guide plates 24 (specifically, vertically arranged rectangular plates are arranged on the right side of the vertical support 23) are arranged side by side up and down, the guide plates 24 are arranged in the left-right direction, and the guide plates 24 on the front side and the rear side of the vertical support 23 are respectively located in the adjacent front and the adjacent rear side of the weight 17.
Specifically, referring to fig. 1-3, the pushing mechanism in the embodiment of the invention is an electric push rod arranged along the front-back direction, which is hinged on the outer wall of the corresponding side of the furnace body 1, and the front end of the telescopic rod is hinged with the outer end of the swing arm. The four pushing mechanisms are synchronously driven and are in rectangular distribution (correspondingly, four notches 7, four pulley blocks 6 and four furnace door closing structures 8 are all in rectangular distribution), and the lower end of the sliding groove 9 is a horn mouth with a small upper part and a large lower part so as to facilitate the entrance of the ball head.
1-3, in the lower pulley block 6 of the embodiment of the invention, the longitudinal pulley 62 is located below the transverse pulley 61 to facilitate the fore-and-aft movement of the oven door 2. The elastic positioning structure 4 is located right below the longitudinal pulley 62 on the corresponding side, and can elastically stretch and retract in the vertical direction (including a vertically arranged sleeve, a telescopic rod in the sleeve, a spring on the telescopic rod, a positioning plate (the upper surface of the positioning plate is smooth) arranged along the front and rear directions, and the like), the sleeve is fixed on the inner side of the vertical beam 31, the spring is arranged between the middle part (on which a limiting convex ring is arranged) and the lower part (which can slide up and down and is arranged on a sliding seat (the sliding seat is fixed on the vertical beam 31), and the lower end is provided with the limiting convex ring) of the elastic positioning structure is fixed on the inner side of the vertical beam 31 on the corresponding side. When the furnace door 2 is positioned at the lower part of the door type bracket 3, the longitudinal pulley 62 is propped against the top of the elastic positioning structure 4, and when the furnace door 2 moves forwards and backwards, the longitudinal pulley 62 always slides on the top of the elastic positioning structure 4.
Further, referring to fig. 1 to 3, the upper portion of the left vertical beam 31 in the embodiment of the present invention is provided with a door fixing structure 25, and the door fixing structure 25 includes a lock pin penetrating the vertical beam 31 in the left-right direction (a through hole through which the lock pin penetrates is provided in the left-right direction), a fixing driving mechanism (which may be a cylinder specifically) for driving the lock pin to move in the left-right direction, and the like, and when the door 2 is located at the upper portion of the door bracket 3, the lock pin is located adjacent below the upper pulley block 6. In the upper pulley block 6, the transverse pulley 61 is located below the longitudinal pulley 62 to facilitate the left-right movement of the locking pin. When the oven door 2 is fixed, the lock pin moves inwards, and the transverse pulley 61 of the upper pulley block 6 abuts against the upper side of the lock pin to fix the oven door 2. When the furnace door 2 is not fixed, the lock pin moves outwards to the outer side of the pulley block 6, and the furnace door 2 can pass through the lock pin downwards.
Preferably, referring to fig. 1-3, the front side of the left vertical beam 31 in the embodiment of the present invention is provided with an L-shaped guide plate 26, and the front side of the left end of the oven door 2 is provided with a straight guide plate 27 (specifically, a vertically arranged rectangular tube) in the front-back direction, and both the L-shaped guide plate 26 and the straight guide plate 27 are vertically arranged. The lateral arms of the L-shaped guide plate 26 are arranged in a left-right direction, in front of the straight guide plate 27, and are fixed (by corresponding brackets) at their outer ends to the vertical beams 31. The longitudinal arms of the L-shaped guide plate 26 are arranged in the front-rear direction, which is located at the rear side of the inner ends of the transverse arms, which is located in front of the oven door 2, which is located adjacent to the inner side of the straight guide plate 27. The foregoing structure can ensure the stability of the front-rear movement of the oven door 2.
Referring to fig. 1-3, four position sensors 28 are arranged side by side on the left vertical beam 31 in the embodiment of the present invention, the four position sensors 28 are sequentially, from top to bottom, a first position sensor (for controlling the door closing structure 8 to ensure that the ball head is located right below the chute 9) is located adjacent to and above the upper notch 7, a second position sensor is located at the upper notch 7 (for determining whether the pulley block 6 is right against the notch 7, for controlling the door closing structure 8 (for matching detection signals of the three position sensors and/or the fourth sensor), a third position sensor (for controlling the speed reduction of the lifting motor 18) is located between the upper notch 7 and the lower notch 7, and a fourth position sensor (for controlling the stopping of the lifting motor 18, which can be controlled immediately or after as required) is located at the elastic positioning structure 4 (corresponding positioning plate). The first position sensor, the second position sensor, the third position sensor and the fourth position sensor in this embodiment are all contact sensors.
The "first", "second", "third" and "fourth" in this embodiment are merely used for distinguishing, and have no other special meaning.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (5)
1. The box-type heating furnace for heat treatment comprises a furnace body (1), a furnace door (2) which is arranged at the front side of the furnace body (1) and can be lifted, and a lifting device for driving the furnace door (2) to lift; it is characterized in that the method comprises the steps of,
the lifting device comprises a chain lifting structure, a door type support (3) in front of the furnace body (1) and two elastic positioning structures (4) at the bottom of the door type support (3), wherein the two elastic positioning structures (4) are arranged side by side left and right and are positioned right below the furnace door (2), and the furnace door (2) is arranged on the door type support (3) in a vertically sliding manner; when the furnace door (2) is positioned at the upper part of the door type bracket (3), the furnace door is positioned above the furnace body (1); when the furnace door (2) is positioned at the lower part of the door type bracket (3), the furnace door is positioned right in front of the furnace body (1), the bottom of the furnace door is propped against the elastic positioning structure (4) and can move backwards; the door type support (3) comprises two vertical beams (31) which are arranged side by side left and right and a top beam (32) which is arranged between the top ends of the two vertical beams (31) and along the left and right direction, the furnace door (2) is arranged between the two vertical beams (31), and a chain lifting structure is arranged between the top of the furnace door and the top beam (32);
two sliding plates (5) are arranged in front of and behind the inner side of the vertical beam (31), the sliding plates (5) are arranged along the left and right directions, two pulley blocks (6) are arranged on the left and right sides of the furnace door (2) in parallel, two notches (7) for the two pulley blocks (6) to pass through are arranged on the lower part of the rear sliding plate (5) in parallel up and down, the pulley blocks (6) comprise transverse pulleys (61) arranged along the front and back directions and longitudinal pulleys (62) arranged along the left and right directions, the transverse pulleys (61) and the longitudinal pulleys (62) are arranged in parallel up and down, the outer sides of the transverse pulleys (61) are slidably arranged on the inner side of the vertical beam (31), and the longitudinal pulleys (62) are arranged between the two sliding plates (5) and are slidably arranged on the sliding plates (5) on the corresponding sides on the front and back sides of the longitudinal pulleys. When the furnace door (2) is positioned at the lower part of the door type bracket (3), the pulley block (6) is positioned right in front of the corresponding notch (7);
two furnace door closing structures (8) are arranged on the left side and the right side of the furnace body (1) and correspond to the notch (7) in a vertical side-by-side mode, two sliding grooves (9) are arranged on the left side and the right side of the furnace door (2) and located at the rear of the pulley block (6) in a side-by-side mode, the two sliding grooves (9) are vertically arranged and correspond to the two furnace door closing structures (8) on the corresponding side respectively, the furnace door closing structures (8) comprise swing arms, ball heads at the inner ends of the swing arms and pushing mechanisms on the side walls of the furnace body (1) which are arranged along the left side and the right side, the middle parts of the swing arms are hinged to the front sides of the left side and the right side walls of the furnace body (1), and the pushing mechanisms are arranged between the outer ends of the swing arms and the side walls on the corresponding sides of the furnace body (1). When the furnace door (2) is positioned at the upper part of the door type bracket (3), the ball head is positioned right below the chute (9); when the furnace door (2) moves downwards, the ball head can be embedded into the corresponding chute (9); the pushing mechanism can enable the ball head to move backwards to push the furnace door (2) to move backwards, the pulley blocks (6) move backwards from the corresponding gaps (7), and the furnace door (2) seals the furnace body (1);
in the pulley block (6) below, the longitudinal pulley (62) is positioned below the transverse pulley (61); the elastic positioning structure (4) is positioned under the longitudinal pulley (62) on the corresponding side, can elastically stretch and retract in the vertical direction and is fixed on the inner side of the vertical beam (31) on the corresponding side; when the furnace door (2) is positioned at the lower part of the door type bracket (3), the longitudinal pulley (62) is propped against the top of the elastic positioning structure (4), and when the furnace door (2) moves forwards and backwards, the longitudinal pulley (62) always slides on the top of the elastic positioning structure (4);
four position sensors (28) are arranged on the left vertical beam (31) side by side up and down, the four position sensors (28) are sequentially a first position sensor, a second position sensor, a third position sensor and a fourth position sensor from top to bottom, the first position sensor is positioned above the upper notch (7) adjacently, the second position sensor is positioned at the upper notch (7), the third position sensor is positioned between the upper notch (7) and the lower notch (7), and the fourth position sensor is positioned at the elastic positioning structure (4);
the chain lifting structure comprises two chains (16), a weight (17) which is arranged on the right side of the door type support (3) and can move up and down, a lifting motor (18) arranged on the upper part of the door type support (3), two guide chain wheels (19) which are arranged side by side left and right on a top beam (32), a driving shaft (20) which is arranged on the right side of the top beam (32) and along the front and back direction, and two driving chain wheels (21) which are arranged side by side front and back on the driving shaft (20), wherein two chain fixing pieces are arranged side by side left and right on the top of the furnace door (2), the two guide chain wheels (19) are respectively positioned right above the two chain fixing pieces, and the driving shaft (20) is in transmission connection with the lifting motor (18); one end of the chain (16) is connected with a corresponding chain fixing piece, then vertically upwards reaches the left side of a corresponding guide chain wheel (19), bypasses the upper side of the corresponding guide chain wheel (19) and horizontally winds out to the right, bypasses the upper side of a corresponding driving chain wheel (21) and winds out downwards from the right side of the corresponding driving chain wheel (21), and the other end of the chain is connected with the weight (17); the two chains (16) respectively bypass the two driving chain wheels (21) and the other ends of the two chains are connected with the weight (17);
the upper part of the vertical beam (31) at the left side is provided with a furnace door fixing structure (25), the furnace door fixing structure (25) comprises a lock pin penetrating the vertical beam (31) along the left-right direction and a fixing driving mechanism for driving the lock pin to move left and right, and when the furnace door (2) is positioned at the upper part of the door bracket (3), the lock pin is positioned below the upper pulley block (6); in the pulley block (6) above, the transverse pulley (61) is positioned below the longitudinal pulley (62); when the furnace door (2) is fixed, the lock pin moves inwards, and the transverse pulley (61) of the pulley block (6) above is propped against the upper side of the lock pin to fix the furnace door (2); when the furnace door (2) is not fixed, the lock pin moves outwards to the outer side of the pulley block (6);
the front side of the vertical beam (31) on the left side is provided with an L-shaped guide plate (26), the front side of the left end of the furnace door (2) is provided with a straight guide plate (27) along the front-back direction, and the L-shaped guide plate (26) and the straight guide plate (27) are vertically arranged; the transverse arms of the L-shaped guide plates (26) are arranged in the left-right direction and positioned in front of the straight guide plates (27), and the outer ends of the transverse arms are fixed on the vertical beams (31); the longitudinal arms of the L-shaped guide plates (26) are arranged along the front-back direction, are arranged at the rear sides of the inner ends of the transverse arms, are positioned in front of the oven door (2), and are positioned at the adjacent inner sides of the straight guide plates (27).
2. The box-type heating furnace for heat treatment according to claim 1, wherein the rear inner wall, the left inner wall and the right inner wall of the furnace body (1) are provided with heating elements (10), the upper inner wall is provided with a circulating fan (11), the rear outer wall is provided with a nitrogen supply structure (12), the top of the furnace body is provided with an exhaust port (13), the installation part surrounding the circulating fan (11) is provided with a water cooling jacket, and the left inner wall and the right inner wall are provided with a plurality of nitrogen spraying holes; the inner wall of the furnace door is also provided with a heating element (10), the nitrogen gas supply structure (12) is also provided with a water cooling jacket, the nitrogen gas supply structure (12) is connected with a nitrogen gas jet hole through an air pipe at the top of the furnace body (1), the water cooling jacket is connected with a cold water supply structure through a water pipe at the top of the furnace body (1), and the inner wall of the furnace door (2) is provided with a boss matched with an opening at the front side of the furnace body (1).
3. The box-type heating furnace for heat treatment according to claim 1, further comprising a workpiece support (14) in the furnace body (1) for placing a workpiece and a feeding slide rail (15) arranged in front of the furnace body (1) and along the front-back direction, wherein a strip-shaped notch matched with a fork of a movable forklift is arranged on the upper side of the workpiece support (14) along the front-back direction, and the feeding slide rail (15) can enable the movable forklift to slide and enable the movable forklift to send the workpiece to the workpiece support (14); the strip-shaped notch is a plurality of rectangular grooves which can be inserted backwards and move upwards by the feeding fork, the rectangular grooves are arranged side by side left and right, and a plurality of hollowed-out holes are formed in the left side wall and the right side wall of the rectangular grooves.
4. The box-type heating furnace for heat treatment according to claim 1, wherein a fixed bracket (22) is arranged at the front side of the top of the furnace body (1), the fixed bracket (22) is fixedly connected with the door-type bracket (3), a driving sprocket is arranged at the rear part of the driving shaft (20), and the lifting motor (18) is arranged at the top of the fixed bracket (22) along the front-rear direction and is in transmission connection with the driving sprocket through a transmission chain; the right-hand member of back timber (32) is extended right and its downside is equipped with vertical support (23) along vertical direction for vertical beam (31) on right side, vertical support (23) are located the adjacent left side of pouring weight (17) and all are equipped with polylith guide board (24) from top to bottom side by side in its front and back both sides, guide board (24) are along controlling to setting up, guide board (24) of both sides are located the adjacent place ahead and the adjacent rear of pouring weight (17) respectively.
5. The box-type heating furnace for heat treatment according to claim 1, wherein the pushing mechanism is an electric push rod arranged along the front-back direction, which is hinged on the outer wall of the corresponding side of the furnace body (1), and the front end of the telescopic rod is hinged with the outer end of the swing arm; the four pushing mechanisms are synchronously driven and are distributed in a rectangular shape, and the lower end of the sliding groove (9) is a horn mouth with a small upper part and a big lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111067344.0A CN113957223B (en) | 2021-09-13 | 2021-09-13 | Box-type heating furnace for heat treatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111067344.0A CN113957223B (en) | 2021-09-13 | 2021-09-13 | Box-type heating furnace for heat treatment |
Publications (2)
| Publication Number | Publication Date |
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| CN113957223A CN113957223A (en) | 2022-01-21 |
| CN113957223B true CN113957223B (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111067344.0A Active CN113957223B (en) | 2021-09-13 | 2021-09-13 | Box-type heating furnace for heat treatment |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR8206640A (en) * | 1981-11-18 | 1983-10-04 | Cameron Iron Works Ltd | OVEN DOOR AND ITS OVEN |
| CN202415612U (en) * | 2011-12-31 | 2012-09-05 | 海盐华辰工业炉有限公司 | Vertical aluminium alloy quenching furnace |
| CN103712453A (en) * | 2012-10-09 | 2014-04-09 | 丹阳市江南工业炉有限公司 | Lifting system for heating furnace doors |
| CN203159667U (en) * | 2013-04-07 | 2013-08-28 | 苏州工业园区热处理设备厂有限公司 | Box type heating furnace |
| CN207091473U (en) * | 2017-06-30 | 2018-03-13 | 天津立中集团股份有限公司 | It is heat-treated fire door automatic lifting locking device |
| CN208536611U (en) * | 2018-06-19 | 2019-02-22 | 德阳万鸿重型锻造有限公司 | A kind of oven door sealing structure of cabinet-type electric furnace |
| CN212299944U (en) * | 2020-03-22 | 2021-01-05 | 江苏丰东环保科技股份有限公司 | Bearing furnace door lifting mechanism with high safety and stability |
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2021
- 2021-09-13 CN CN202111067344.0A patent/CN113957223B/en active Active
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| CN113957223A (en) | 2022-01-21 |
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Denomination of invention: Box type heating furnace for heat treatment Granted publication date: 20230630 Pledgee: Jingmen Branch of China Postal Savings Bank Co.,Ltd. Pledgor: Jingmen soliter Thermal Technology Co.,Ltd. Registration number: Y2024980019815 |