CN214172904U - Stepping resistance heating furnace - Google Patents
Stepping resistance heating furnace Download PDFInfo
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- CN214172904U CN214172904U CN202120135273.2U CN202120135273U CN214172904U CN 214172904 U CN214172904 U CN 214172904U CN 202120135273 U CN202120135273 U CN 202120135273U CN 214172904 U CN214172904 U CN 214172904U
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Abstract
The utility model provides a marching type resistance heating furnace, the induction cooker comprises a cooker bod, feed arrangement, step device, discharging device and electric heat parts, the furnace body has the furnace roof, a pair of side wall and a pair of headwall, its inside furnace that is heating workpiece, feed arrangement installs on the headwall on the left side, step device locates in the pit of furnace below, discharging device installs on the headwall on the right, the electric heat parts symmetry is provided with two, every electric heat parts is from last down cartridge on the furnace roof, its lower extreme is unsettled in furnace, and be close to the side wall and lay. The utility model discloses the electric heating element who sets up installs on the furnace roof and its lower extreme is unsettled in furnace through the mode of upper and lower cartridge, can freely stretch out and draw back after being heated, and the maintenance is changed conveniently, can realize the maintenance change that does not shut down.
Description
Technical Field
The utility model relates to a heating furnace equipment technical field, concretely relates to marching type resistance heating furnace that is used for titanium and titanium alloy square billet, the rolling preceding heating of pole base.
Background
The walking beam furnace is a kind of "continuous furnace" widely used in industrial furnace industry, and moves along a certain track (usually a rectangular track formed by ascending, advancing, descending and retreating) by a special walking mechanism, so that the material blank in the furnace is transferred forward one by one.
The walking beam furnace is divided into walking beam gas furnace and walking beam resistance furnace according to different heating devices.
At present, a stepping resistance heating furnace is heated by a resistance band, the resistance band is fixed on a side wall, the stepping resistance heating furnace can be overhauled only after being shut down and cooled, the maintenance and the replacement are very inconvenient, the cost is higher, a workpiece cannot be turned or is rarely turned when being stepped, the workpiece is easily heated unevenly, the heat treatment effect is poor, and the subsequent processing of the workpiece is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a marching type resistance heating furnace to the not uniform problem of being heated of the inconvenient and work piece of marching type heating furnace maintenance among the solution prior art.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a resistance walking beam furnace comprising:
the furnace body is provided with a furnace top, a pair of side walls and a pair of end walls, and a hearth for heating workpieces is arranged inside the furnace body;
the feeding device is arranged on the left end wall and used for feeding the workpieces;
the stepping device is arranged in a pit below the hearth and used for transferring the workpiece to advance;
the discharging device is arranged on the end wall on the right side and is used for discharging the workpiece; and
the electric heating components are symmetrically arranged in two rows;
each row of electric heating components are inserted on the furnace top from top to bottom, the lower ends of the electric heating components are suspended in the hearth, and the electric heating components are arranged close to the side walls.
In one embodiment disclosed in the application, the furnace chamber is divided into 8 heating zones with equal power distribution along the length direction, and each heating zone contains 4 pairs of electric heating components.
In one embodiment disclosed in the application, two thermocouples are symmetrically arranged on the top of each heating zone, one thermocouple is used for measuring temperature, and the other thermocouple is used for controlling temperature.
In one embodiment of the present disclosure, the electrical heating component is a squirrel cage heater.
In one embodiment disclosed in the present application, two sides of the long central axis of the hearth bottom are respectively provided with 2 rows of spaced fixed beams, the top of the stepping device is provided with 2 rows of movable beams symmetrical to the long central axis of the hearth bottom, and each row of the movable beams is located in the space between the fixed beams; the fixed beam and the movable beam are both in a sawtooth structure, and the sawteeth on the top surface of the fixed beam and the sawteeth on the top surface of the movable beam are staggered.
In one embodiment disclosed in the present application, the stepping device includes an upper beam frame, a lower beam frame, and an inclined rail, the movable beam is connected to the upper beam frame, and the upper beam frame is pushed by a hydraulic cylinder to horizontally move; the lower beam frame is respectively connected with the upper beam frame and the inclined rail in a rolling way through supporting wheels arranged on the upper side and the lower side of the lower beam frame, and the lower beam frame is pushed by a hydraulic cylinder to move obliquely.
In one embodiment disclosed in the present application, the feeding device includes a feeding port and a feeding cantilever mechanism, the feeding port is disposed on the side wall, and the feeding cantilever mechanism is composed of a plurality of cantilever rollers which are supported on the left end wall through a frame and are arranged in parallel; the cantilever roller penetrates through the end wall in a rotating mode, one end, located outside the furnace, of the cantilever roller is connected with a feeding motor installed on the rack, and a roller wheel is arranged at one end, located inside the furnace, of the cantilever roller.
In one embodiment disclosed in the present application, the discharging device includes a discharging port and a discharging cantilever mechanism, the discharging port is disposed on the side wall, and the discharging cantilever mechanism is composed of a plurality of cantilever rollers which are supported on the end wall on the right side through a frame and are arranged in parallel; the cantilever roller penetrates through the end wall in a rotating mode, one end, located outside the furnace, of the cantilever roller is connected with a discharging motor installed on the rack, and a roller wheel is arranged at one end, located inside the furnace, of the cantilever roller.
In one embodiment disclosed herein, the cantilevered rollers have a total of 16, 8 feeds and 8 discharges.
In one embodiment disclosed herein, the feed and discharge ports are circular ports having diameters that are equal to and greater than the largest cross-sectional dimension of the workpiece.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the electric heating component is arranged on the furnace top in an up-down inserting mode, the lower end of the electric heating component is suspended in the furnace chamber, the electric heating component can freely stretch out and draw back after being heated, the maintenance and the replacement are convenient, and the maintenance and the replacement without shutdown can be realized;
2. each heating zone realizes temperature measurement and temperature control through two thermocouples, so that the zone temperature control is realized, the temperature control effect is good, and the uniformity of the furnace temperature is improved;
3. the top surfaces of the fixed beam and the movable beam are designed to be of a sawtooth structure, the structure is similar to a V-shaped groove, the structure is suitable for square billet and round bar billet workpieces, and meanwhile, the workpieces can be automatically turned in walking operation through dislocation, so that the workpieces are prevented from being bent in the heating process, the workpieces are heated more uniformly, and the heat treatment effect is good;
4. the feed inlet and the discharge outlet are round openings, the diameters of the feed inlet and the discharge outlet are equal and larger than the maximum cross-sectional dimension of the workpiece, so that the heat loss can be reduced during feeding and discharging, the temperature fluctuation of the preheating chamber and the combustion chamber can be reduced, the requirement on the temperature stability of the hearth can be met, the uniform heating of the workpiece in the process of stepping from the preheating chamber to the combustion chamber can be ensured, the local metallographic defect cannot be caused, the heat treatment effect is good, and the heat efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of the structure of the present invention;
fig. 2 is a schematic top view of the present invention;
fig. 3 is a left side view structure diagram of the present invention.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1 to 3, the utility model provides a step resistance heating furnace, which comprises:
a furnace body 100 having a furnace top 110, a pair of side walls 120 and a pair of end walls 130, and a hearth for heating a workpiece therein;
a feeding device 200 installed on the left end wall 130 for feeding the work;
the stepping device 300 is arranged in a pit below the hearth and used for transferring the workpiece to advance;
the discharging device 400 is arranged on the end wall 130 on the right side and is used for discharging the workpieces; and
the electric heating parts 500 are symmetrically provided with two rows;
each row of electric heating components 500 is inserted on the furnace top 110 from top to bottom, the lower ends of the electric heating components are suspended in the hearth, and the electric heating components are arranged close to the side walls 120. So, electric heating element 500 can freely stretch out and draw back after being heated, and it is convenient to maintain and change simultaneously, can realize the maintenance change that does not shut down.
The electric heating part 500 is a squirrel cage heater. Specifically, the resistance wire of the squirrel-cage heater is made of first-steel HRE series high-temperature electric heating alloy wires, the maximum service temperature is 1100 ℃, and the squirrel-cage heater has the characteristics of high temperature resistance, oxidation resistance and long service life. The electrothermal alloy wire material is 0Cr21Al6Nb, and the surface load is controlled at 1.1W/cm2And the service life of the heating element can be ensured. Parameters of the squirrel cage heater are as follows:
(1) installation distance: 250-290 mm;
(2) specification: phi 140 multiplied by 1600 mm;
(3) single branch power: 12.5 kW.
In this embodiment, the furnace is divided into 8 heating zones with equal power distribution along the length direction, and each heating zone contains 4 pairs of electric heating components 500 (i.e. 8 sets of squirrel cage heaters).
Two thermocouples 600 are symmetrically arranged on the furnace top 110 of each heating zone, one thermocouple is used for measuring temperature, the other thermocouple is used for controlling temperature, and mutual reference is realized, so that the zone temperature control is realized, the temperature control effect is good, and the uniformity of the furnace temperature can be effectively improved.
Two sides of the long central axis of the hearth bottom are respectively provided with 2 rows of spaced fixed beams 140, the top of the stepping device 300 is provided with 2 rows of movable beams 310 which are symmetrical to the long central axis of the hearth bottom, and each row of movable beams 310 are positioned in the space between the fixed beams 140; the top surfaces of the fixed beam 140 and the movable beam 310 are both saw-toothed structures, and the saw teeth on the top surface of the fixed beam 140 are staggered with the saw teeth on the top surface of the movable beam 310. The top surfaces of the fixed beam 140 and the movable beam 310 are designed to be of a zigzag structure, the zigzag structure is similar to a V-shaped groove, the zigzag structure is suitable for square billet and round bar billet workpieces, and meanwhile, the workpieces can rotate and turn in walking operation through dislocation, so that the workpieces are prevented from being bent in the heating process, the workpieces are heated more uniformly, and the heat treatment effect is good.
Specifically, the fixed beam 140 is fixed on the section steel at the bottom of the hearth by a pillar, and the movable beam 310 is fixed on the beam frame of the stepping device 300 by the pillar passing through the hole at the bottom of the hearth; the hole adopts a non-water-cooling double-layer dry-sealed carriage structure, the dry-sealed carriage adopts an upper plate and a lower plate, the upper carriage is arranged in the furnace and is made of a heat-resistant steel plate Cr25Ni20, and the lower carriage is arranged at the bottom of the furnace body and is made of a common steel plate.
The stepping device 300 comprises an upper beam frame 320, a lower beam frame 330 and an inclined rail 340, wherein the movable beam 310 is connected with the upper beam frame 320, and the upper beam frame 320 is pushed by a hydraulic cylinder to horizontally run; the lower beam frame 330 is respectively connected with the upper beam frame 320 and the inclined rail 340 in a rolling way through supporting wheels 331 arranged on the upper side and the lower side of the lower beam frame 330, and the lower beam frame 330 runs obliquely by the pushing action of a hydraulic cylinder.
Specifically, the upper beam frame 320 and the lower beam frame 330 are formed by welding large-sized section steel, and the upper beam frame 320 is pushed by a translation hydraulic cylinder to horizontally run on the supporting wheels 331, so that the horizontal movement of the movable beam 310 is realized; the lower beam frame 330 is pushed by two lifting hydraulic cylinders to obliquely run on the inclined rails 340 so as to lift the upper beam frame 320 to realize the lifting movement of the movable beam 310. The mechanism formed by the above components is called a double-wheel inclined rail mechanism, and the lifting and horizontal movement of the mechanism are realized by means of centering wheel sets and sliding plates which are arranged at two ends of the central line of the frame, so that the operation reliability is high, the installation and debugging are convenient, and the maintenance is facilitated.
The sequence of operation of the walking beam 310 is as follows:
the lifting hydraulic cylinder pushes the lower beam frame 330 to move up and down on the inclined rail 340, and the upper beam frame 320 is driven to move up and down through the upper side supporting wheel 331; during this process, the translational hydraulic cylinder is locked. When the movable beam 310 is lifted to a proper position, the translational hydraulic cylinder pushes the upper beam frame 320 to perform translational motion on the upper side supporting wheel 331 of the lower beam frame 330; during this process, the hydraulic lift cylinders are locked. The movement period of the movable beam 310 to complete the above actions is 50 seconds.
The feeding device 200 comprises a feeding hole 210 and a feeding cantilever mechanism 220, the feeding hole 210 is arranged on the side wall 120, and the feeding cantilever mechanism 220 is composed of a plurality of cantilever rollers which are supported on the end wall 130 on the left side through a frame and are arranged in parallel; the cantilever roller rotates through the end wall 130, and its end outside the furnace is connected to a feeding motor 230 mounted on the frame, and its end inside the furnace is provided with a roller.
The discharging device 400 comprises a discharging port 410 and a discharging cantilever mechanism 420, the discharging port 410 is arranged on the side wall 120, and the discharging cantilever mechanism 420 is composed of a plurality of cantilever rollers which are supported on the end wall 130 on the right side through a frame and are arranged in parallel; the cantilever roller rotates through the end wall 130, and its one end outside the furnace is connected to the discharge motor 430 mounted on the frame, and its one end inside the furnace is provided with a roller.
Specifically, the cantilevered rolls are made of heat resistant steel ZG40Cr25Ni20Si2, supported on the headwall 130, and are individually removable from the furnace for maintenance. The cantilever roller shaft adopts a closed water cooling structure, water inlet and outlet are connected by a shaft rear end rotating sleeve, the roller can be ensured to operate at high temperature for a long time, and the roller rotates at low speed in a non-feeding state, so that the bending deformation of the cantilever roller can be prevented. Each cantilever roller is driven by a motor reducer (a feeding motor 230 and a discharging motor 430) (a single-wheel single motor), and the speed is adjustable (30-40 m/min) by adopting frequency conversion and speed regulation. In this example, 16 cantilever rollers were used in total, and 8 cantilever rollers were used for feeding and discharging.
The feed port 210 and the discharge port 410 are circular ports having diameters equal to and larger than the maximum cross-sectional dimension of the workpiece (e.g., the diameter of a round rod). So, when advancing, the ejection of compact, can reduce calorific loss, reduce the temperature fluctuation of preheating chamber and combustion chamber, can satisfy furnace temperature stability's requirement, can guarantee simultaneously that the work piece is heated evenly from the in-process that the preheating chamber step to the combustion chamber, can not cause local metallographic defect, and heat treatment is effectual, has improved the thermal efficiency.
The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.
Claims (10)
1. A resistance walking beam furnace, comprising:
the furnace body is provided with a furnace top, a pair of side walls and a pair of end walls, and a hearth for heating workpieces is arranged inside the furnace body;
the feeding device is arranged on the left end wall and used for feeding the workpieces;
the stepping device is arranged in a pit below the hearth and used for transferring the workpiece to advance;
the discharging device is arranged on the end wall on the right side and is used for discharging the workpiece; and
the electric heating components are symmetrically arranged in two rows;
each row of electric heating components are inserted on the furnace top from top to bottom, the lower ends of the electric heating components are suspended in the hearth, and the electric heating components are arranged close to the side walls.
2. The resistance walking beam furnace of claim 1, wherein said furnace chamber is divided into 8 heating zones of equal power distribution along the length direction, each of said heating zones comprising 4 pairs of said electric heating elements.
3. The resistance walking beam furnace of claim 2, wherein two thermocouples are symmetrically mounted on the top of each heating zone, one for measuring temperature and the other for controlling temperature.
4. The resistance-walking oven according to any one of claims 1 to 3, wherein the electric heating element is a squirrel cage heater.
5. The step resistance heating furnace according to claim 1, wherein two sides of the long central axis of the hearth bottom are respectively provided with 2 rows of spaced fixed beams, the top of the stepping device is provided with 2 rows of movable beams symmetrical to the long central axis of the hearth bottom, and each row of the movable beams is positioned in the space between the fixed beams; the fixed beam and the movable beam are both in a sawtooth structure, and the sawteeth on the top surface of the fixed beam and the sawteeth on the top surface of the movable beam are staggered.
6. The walking resistance heating furnace according to claim 5, wherein the stepping device comprises an upper beam frame, a lower beam frame and a ramp, the movable beam is connected with the upper beam frame, and the upper beam frame is pushed by a hydraulic cylinder to move horizontally; the lower beam frame is respectively connected with the upper beam frame and the inclined rail in a rolling way through supporting wheels arranged on the upper side and the lower side of the lower beam frame, and the lower beam frame is pushed by a hydraulic cylinder to move obliquely.
7. The resistance furnace according to any one of claims 1, 5 and 6, wherein the feeding device comprises a feeding port and a feeding cantilever mechanism, the feeding port is arranged on the side wall, and the feeding cantilever mechanism is composed of a plurality of cantilever rollers which are supported on the left end wall through a frame and are arranged in parallel; the cantilever roller penetrates through the end wall in a rotating mode, one end, located outside the furnace, of the cantilever roller is connected with a feeding motor installed on the rack, and a roller wheel is arranged at one end, located inside the furnace, of the cantilever roller.
8. The resistance furnace according to claim 7, wherein the discharge device comprises a discharge port and a discharge cantilever mechanism, the discharge port is arranged on the side wall, and the discharge cantilever mechanism is composed of a plurality of cantilever rollers which are supported on the end wall on the right side through a frame and are arranged in parallel; the cantilever roller penetrates through the end wall in a rotating mode, one end, located outside the furnace, of the cantilever roller is connected with a discharging motor installed on the rack, and a roller wheel is arranged at one end, located inside the furnace, of the cantilever roller.
9. The resistance furnace according to claim 8, wherein the number of the cantilever rolls is 16, and 8 cantilever rolls are fed and discharged.
10. A resistance walking beam furnace as claimed in claim 8 or claim 9 wherein said inlet and outlet ports are circular ports of equal diameter and greater than the maximum cross-sectional dimension of the workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120135273.2U CN214172904U (en) | 2021-01-19 | 2021-01-19 | Stepping resistance heating furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120135273.2U CN214172904U (en) | 2021-01-19 | 2021-01-19 | Stepping resistance heating furnace |
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| CN214172904U true CN214172904U (en) | 2021-09-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113774210A (en) * | 2021-09-30 | 2021-12-10 | 四川西南工业炉有限公司 | Soaking pit furnace for spring production |
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2021
- 2021-01-19 CN CN202120135273.2U patent/CN214172904U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113774210A (en) * | 2021-09-30 | 2021-12-10 | 四川西南工业炉有限公司 | Soaking pit furnace for spring production |
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