CN216385114U - Electric furnace and furnace door structure thereof - Google Patents
Electric furnace and furnace door structure thereof Download PDFInfo
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- CN216385114U CN216385114U CN202122929343.4U CN202122929343U CN216385114U CN 216385114 U CN216385114 U CN 216385114U CN 202122929343 U CN202122929343 U CN 202122929343U CN 216385114 U CN216385114 U CN 216385114U
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Abstract
The utility model provides an electric stove and a stove door structure thereof, wherein the stove door structure comprises: furnace door shell, the door plant, hoist mechanism and hold-down mechanism, the door opening has been seted up to furnace door shell lower part, the door plant is located the furnace door shell, hoist mechanism locates outside the furnace door shell, its one end stretches into in the furnace door shell and links to each other with the door plant, be used for driving the door plant and reciprocate, so that the door plant opens or closes the door opening, hold-down mechanism locates outside the furnace door shell, the door plant is equipped with sealing member and resilience piece dorsad hold-down mechanism's one end, hold-down mechanism's one end stretches into in the furnace door shell and can stretch out and draw back relatively the furnace door shell, with exert thrust or relieve thrust to the door plant, when hold-down mechanism applys thrust to the door plant, the door plant moves towards furnace door shell one side, to sealing structure and resilience piece crimping between furnace door shell and door plant, when hold-down mechanism removes the thrust to the door plant, resilience piece resets and removes to promote the door plant and the furnace door shell and remove being connected. The structure can realize the mechanical lifting of the electric furnace door and the reliable sealing after the furnace door is closed.
Description
Technical Field
The utility model relates to the technical field of industrial furnace equipment, in particular to an electric furnace and a furnace door structure thereof.
Background
In the manufacturing and processing industry of nuclear materials, electric furnace equipment is generally used for drying, calcining and the like of materials, and in order to meet technological requirements, process gas-hydrogen needs to be introduced into a furnace pipe at normal temperature so as to ensure that stable atmosphere in the furnace pipe is maintained after temperature rise. Hydrogen is more prone to leakage and is an explosive medium than general gases, so such special environments put higher demands on the oven door structure: reliable gas sealing, convenient lifting operation (the electric furnace door needs to be lifted so as to execute feeding and discharging operation), and the whole mechanism needs to be opened and sealed by a mechanical mechanism in a closed space (the operation on nuclear materials is generally carried out in the closed space) (the furnace door must realize reliable gas tightness, and the process gas in the furnace container is prevented from leaking into a sealed box chamber). Because the temperature of the sealed object is higher, the realization of reliable sealing is always a difficult problem which troubles the manufacture of the electric furnace equipment, and the furnace door structure of a common industrial electric furnace can not realize the special requirements needed to be realized by processing the furnace door of the electric furnace by using nuclear materials.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide an electric furnace door structure aiming at the defects in the prior art, which can realize the mechanical lifting of the electric furnace door and the reliable sealing after the electric furnace door is closed, and correspondingly, the utility model also provides an electric furnace with the electric furnace door mechanical mechanism.
The technical scheme adopted for solving the technical problem of the utility model is as follows:
the utility model provides an electric furnace door structure, comprising: a furnace door shell, a door plate, a lifting mechanism and a pressing mechanism,
the lower part of the furnace door shell is provided with a door opening for material inlet and outlet,
the door plate is positioned in the furnace door shell, the lifting mechanism is arranged outside the furnace door shell, one end of the lifting mechanism extends into the furnace door shell and is connected with the door plate and used for driving the door plate to move up and down so as to open or close the door opening,
hold-down mechanism locates outside the furnace door shell, the door plant is equipped with seal structure and resilience piece dorsad hold-down mechanism's one end, hold-down mechanism's one end stretches into in the furnace door shell and can be flexible relative furnace door shell to exert thrust or remove thrust to the door plant, work as hold-down mechanism when exerting thrust to the door plant, the door plant removes towards furnace door shell one side, extremely seal structure crimping is between furnace door shell and door plant, just resilience piece is compressed in the door plant and between the furnace door shell, works as when hold-down mechanism removes the thrust to the door plant, resilience piece resets and removes to be connected with promoting door plant and furnace door shell.
Optionally, the pressing mechanism is a plurality of telescopic cylinders, and the plurality of telescopic cylinders are arranged around the door opening of the furnace door shell at intervals; the cylinder barrel of the telescopic cylinder is fixed on the lower part of the outer side wall of the furnace door shell, and the piston rod of the telescopic cylinder penetrates through the outer side wall of the furnace door shell and then extends into the furnace door shell.
Optionally, the plurality of telescopic cylinders comprise a plurality of hydraulic telescopic cylinders and a plurality of electric telescopic cylinders, and the plurality of hydraulic telescopic cylinders and the plurality of electric telescopic cylinders are alternately arranged around the door opening of the furnace door shell at intervals.
Optionally, the lifting mechanism comprises a motor, a winding drum and a rope, the winding drum is arranged in the furnace door shell, one end of the rope is wound on the winding drum, the other end of the rope is connected with the door plate, the motor is fixed on the lower portion of the outer side wall of the furnace door shell, and a driving shaft of the motor penetrates through the outer side wall of the furnace door shell and then extends into the furnace door shell and is connected with the winding drum in a transmission mode.
Optionally, a photoelectric switch is arranged on the oven door shell, an induction sheet is arranged on the door plate, and when the door plate moves downwards to a lower dead point, the induction sheet corresponds to the photoelectric switch to open the photoelectric switch.
Optionally, a guide mechanism is arranged in the oven door shell, and the guide mechanism is fixedly connected with the oven door shell and used for guiding the door panel to move up and down in a linear mode.
Optionally, a cooling water channel is arranged in the door plate, the cooling water channel and a cooling water source outside the furnace door shell form a circulation loop through a pipeline, the pipeline comprises a spiral water pipe arranged in the furnace door shell, and a water leakage detection device is arranged at the bottom of the furnace door shell.
Optionally, the top of the furnace door shell is provided with a nitrogen interface and a hydrogen probe interface, and the outer side wall of the furnace door shell is provided with an observation port and an access port.
Optionally, the furnace door comprises a furnace door seat, and the furnace door shell is supported on the furnace door seat through a support frame.
Optionally, the oven door shell comprises an upper half shell and a lower half shell, which are joined by flanges to form the oven door shell.
The utility model also provides an electric furnace, which comprises a furnace body and the electric furnace door structure, wherein the furnace door shell of the electric furnace door structure is connected to the furnace body in a sealing manner.
According to the utility model, the electric furnace door adopts a structural form of a furnace door shell with a hollow cavity and a door opening and a door plate positioned in the furnace door shell, and the door plate is driven to lift through a mechanical lifting mechanism, so that the door opening is opened and closed; be equipped with seal structure and rebound spare on the wall of door plant, move towards the furnace door shell through telescopic hold-down mechanism drive door plant, can borrow the sealed crimping of the two of seal structure realization between the two, thereby realize the reliable sealing of door opening, satisfy the sealed requirement that prevents hydrogen and leak that provides the electric furnace door in the nuclear material manufacturing and processing trade, simultaneously, the two sealed crimping in-process rebound spare is compressed, after hold-down mechanism contracts, rely on the restoring force of rebound spare to realize the separation of door plant and furnace door shell. Therefore, the electric furnace door has the advantages of simple structure, reliable sealing, small workload of maintenance and repair, high automation degree and obvious reduction of labor intensity. And each operation part is positioned in the furnace door shell, so that the possibility that any internal part infected with the nuclear material is contacted with workers can be avoided, and the protection requirement of operators can be met.
Drawings
Fig. 1 is a schematic front view of a door structure of an electric furnace provided in embodiment 1 of the present invention;
fig. 2 is a side view structural schematic diagram of an electric furnace door structure provided in embodiment 1 of the present invention;
fig. 3 is a schematic longitudinal sectional view of an electric furnace door structure provided in embodiment 1 of the present invention;
fig. 4 is a sectional view taken along line a-a of fig. 3.
In the figure: 1. a photoelectric switch; 2. a furnace door seat; 3. an electric telescopic cylinder; 4. a lower half shell; 5. a hydraulic telescopic cylinder; 6. an upper half shell; 7. a viewing port; 8. a motor; 9. an access hole; 10. a nitrogen interface; 11. a hydrogen probe interface; 12. a door panel; 13. a guide mechanism; 14. a resilient member; 15. a flange; 16. a spiral water pipe; 17. a water leakage detection device; 18. a sealing structure; 19. a door opening.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.
In the description of the present invention, it should be noted that the indication of orientation or positional relationship, such as "on" or the like, is based on the orientation or positional relationship shown in the drawings, and is only for convenience and simplicity of description, and does not indicate or imply that the device or element referred to must be provided with a specific orientation, constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected," "disposed," "mounted," "fixed," and the like are to be construed broadly, e.g., as being fixedly or removably connected, or integrally connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
The utility model provides an electric furnace door structure, comprising: a furnace door shell, a door plate, a lifting mechanism and a pressing mechanism,
the lower part of the furnace door shell is provided with a door opening for material inlet and outlet,
the door plate is positioned in the furnace door shell, the lifting mechanism is arranged outside the furnace door shell, one end of the lifting mechanism extends into the furnace door shell and is connected with the door plate and used for driving the door plate to move up and down so as to open or close the door opening,
hold-down mechanism locates outside the furnace door shell, the door plant is equipped with seal structure and resilience piece dorsad hold-down mechanism's one end, hold-down mechanism's one end stretches into in the furnace door shell and can be flexible relative furnace door shell to exert thrust or remove thrust to the door plant, work as hold-down mechanism when exerting thrust to the door plant, the door plant removes towards furnace door shell one side, extremely seal structure crimping is between furnace door shell and door plant, just resilience piece is compressed in the door plant and between the furnace door shell, works as when hold-down mechanism removes the thrust to the door plant, resilience piece resets and removes to be connected with promoting door plant and furnace door shell.
The utility model also provides an electric furnace, which comprises a furnace body and the electric furnace door structure, wherein the furnace door shell of the electric furnace door structure is connected to the furnace body in a sealing manner.
Example 1:
as shown in fig. 1 to 4, the present embodiment provides an electric furnace door structure provided to an electric furnace for nuclear material manufacturing process, the electric furnace door structure including: the furnace door comprises a furnace door shell, a door plate 12, a lifting mechanism and a pressing mechanism, wherein the furnace door shell is vertical to the ground.
The lower part of the furnace door shell is provided with a door opening 19 for material inlet and outlet,
the door plate 12 is positioned in the furnace door shell, the lifting mechanism is arranged outside the furnace door shell, one end of the lifting mechanism extends into the furnace door shell and is connected with the door plate 12 and used for driving the door plate 12 to move up and down so as to open or close the door opening 19 by the door plate 12,
hold-down mechanism locates outside the furnace door shell, door plant 12 is equipped with seal structure 18 and rebound spare 14 to hold-down mechanism's one end dorsad, hold-down mechanism's one end stretches into in the furnace door shell and can stretch out and draw back relatively the furnace door shell, in order to exert thrust or remove thrust to door plant 12, when hold-down mechanism applys thrust to door plant 12, door plant 12 moves towards furnace door shell one side, to seal structure 18 crimping between furnace door shell and door plant 12, and rebound spare 14 is compressed between door plant 12 and the furnace door shell, when hold-down mechanism removes the thrust to door plant 12, rebound spare 14 resets and removes to be connected with promoting door plant 12 and furnace door shell.
In the embodiment, the electric furnace door adopts a structural form of a furnace door shell with a hollow cavity and a door opening and a door plate 12 positioned in the furnace door shell, and the door plate 12 is driven to lift through a mechanical lifting mechanism, so that the door opening is opened and closed; be equipped with sealed structure 18 and resilience piece 14 on the wall of door plant 12, move towards the furnace door shell through telescopic hold-down mechanism drive door plant 12, can borrow seal structure 18 between the two to realize the sealed crimping of the two, thereby realize the reliable sealed of door opening, satisfy the sealed requirement that prevents hydrogen and leak that proposes to the electric furnace door in the nuclear materials manufacturing and processing trade, simultaneously, the two sealed crimping in-process resilience piece 14 is compressed, after hold-down mechanism contracts back, rely on the restoring force of resilience piece 14 can realize the separation of door plant 12 and furnace door shell. Therefore, the electric furnace door of the embodiment has the advantages of simple structure, reliable sealing, small workload of overhaul and maintenance, high automation degree and obvious reduction of labor intensity. And each operation part is positioned in the furnace door shell, so that the possibility that any internal part infected with the nuclear material is contacted with workers can be avoided, and the protection requirement of operators can be met.
In particular, the oven door shell comprises an upper half-shell 6 and a lower half-shell 4, the upper half-shell 6 and the lower half-shell 4 being joined together by a flange 15 to form the oven door shell. The lower half shell 4 is supported on the two furnace door seats 2 through a support frame, and the two furnace door seats 2 are respectively arranged at the left lower side and the right lower side of the furnace door shell.
A double-O-shaped sealing ring groove is formed in the door panel 12, and the sealing structure 18 is a double-O-shaped sealing ring which is embedded in the groove of the door panel 12.
In the embodiment, in order to further realize reliable sealing of the door opening 19, the pressing mechanism is a plurality of telescopic cylinders, and the plurality of telescopic cylinders are arranged at intervals around the door opening 19 of the furnace door shell; the cylinder barrel of the telescopic cylinder is fixed on the lower part of the outer side wall of the furnace door shell, and the piston rod of the telescopic cylinder penetrates through the outer side wall of the furnace door shell and then extends into the furnace door shell.
In this embodiment, the plurality of telescopic cylinders include a plurality of hydraulic telescopic cylinders 5 and a plurality of electric telescopic cylinders 3, and the plurality of hydraulic telescopic cylinders 5 and the plurality of electric telescopic cylinders 3 are arranged around the door opening of the furnace door shell at intervals in an alternating manner.
Specifically, six hydraulic telescopic cylinders 5 and six electric telescopic cylinders 3 are uniformly distributed on the lower half shell 4, the hydraulic telescopic cylinders 5 can adjust different pressure values to apply pressure to the door panel 12, and after the hydraulic telescopic cylinders 5 complete the action, the electric telescopic cylinders 3 are started as auxiliary pressing mechanisms. When the pressing state of the door panel 12 needs to be released, the electric telescopic cylinder 3 is firstly released, and then the hydraulic telescopic cylinder 5 is released.
Thus, the present embodiment applies pressure to the door panel using a dual structure: the hydraulic mechanism tightly pushes the door plate and the electric locking mechanism assists in tightly pushing the door plate, the pushing pressure is guaranteed, and the pressure of the hydraulic mechanism can be adjusted so as to be suitable for different sealing pressure environments.
In this embodiment, hoist mechanism includes motor 8, reel and rope, and in the stove door shell was located to the reel, the one end winding of rope was on the reel, and the other end links to each other with door plant 12, and motor 8 is fixed in the lower part of stove door shell lateral wall, and its drive shaft passes and stretches into in the stove door shell behind the lateral wall of stove door shell, and links to each other with the reel transmission.
The lifting and descending of the door panel 12 are realized through the winding drum lifting device, so that the door 12 is opened and closed very quickly, the appearance is compact, the occupied space is small, the requirement on the installation space is low, and the design stroke of the material feeding/taking structure of the electric furnace is not increased remarkably.
In conclusion, the operation parts of the lifting mechanism and the pressing mechanism are both positioned in the furnace door shell, so that any internal part which is infected with the nuclear material is prevented from contacting with an operator, and the protection requirement of the operator is met.
In this embodiment, the door shell is provided with the photoelectric switch 1, the door panel 12 is provided with the sensing piece, and when the door panel 12 moves downward to the lower dead point, the sensing piece corresponds to the photoelectric switch 1 to turn on the photoelectric switch 1.
Photoelectric switch 1 and hoist mechanism's motor 8 all is connected with the DCS system electricity, and photoelectric switch 1 opens the back and gives the DCS system with the signal transmission, and DCS system control motor 8 stall to the door plant descends to the assigned position.
In this embodiment, a guiding mechanism 13 is disposed in the oven door shell, and the guiding mechanism 13 is fixedly connected to the oven door shell and used for guiding the door panel 12 to move up and down in a linear manner.
Specifically, the guide mechanism 13 is a guide rod, and two guide rods are arranged and respectively arranged on two sides of the door panel in the width direction for guiding the lifting motion of the door panel 12 and preventing the door panel 12 from swinging too much in the lifting process.
In this embodiment, in order to reduce the temperature of the oven door and avoid the temperature at the sealed position of the oven door from being too high, the inside of the door panel 12 is hollowed to form a cooling water channel, the cooling water channel and a cooling water source outside the oven door shell form a circulation loop through a pipeline, the pipeline comprises a spiral water pipe 16 arranged in the oven door shell, and a water leakage detection device 17 is arranged at the bottom of the oven door shell. When the door panel 12 and the spiral water pipe 16 leak water and drop on the water leakage detection device 17, the water leakage detection device 17 is triggered to alarm.
In this embodiment, the top of furnace door shell is equipped with nitrogen gas interface 10 and hydrogen probe interface 11, sets up the nitrogen gas import and connects nitrogen gas and be used for protecting furnace gate internal environment, sets up hydrogen probe interface and connects detecting equipment and be used for monitoring the hydrogen concentration of revealing and report to the police. The outer side wall of the furnace door shell is provided with an observation port 7 for observing the water leakage condition of the spiral water pipe 16 and an access port 9 convenient for the door panel 12 to overhaul.
The outer side wall of the furnace door shell in the embodiment refers to the outer wall surface of the side plate of the furnace door shell, which faces away from the interior of the electric furnace.
The operation process of the electric furnace door structure of the embodiment is as follows:
after confirming that the feeding is finished, the lifting mechanism is started to drive the door panel 12 to descend under the guidance of the guide rod. When the door panel 12 moves to the bottom dead center, the photoelectric switch 1 in-place signal is fed back to the lifting mechanism, and the lifting mechanism stops descending the door panel 12.
After confirming that the door panel 12 is in place, 6 uniformly distributed hydraulic telescopic cylinder mechanisms are started to apply pressure to the door panel 12, and the applied pressure can be adjusted according to the pressure of the furnace pipe. After the hydraulic mechanism finishes pressing, 6 uniformly distributed electric locking mechanisms start to work to tightly push the door plate 12, and the door plate 12 and the furnace pipe flange are sealed through a sealing ring.
And during the normal temperature rise and temperature reduction of the furnace pipe, the circulating cooling water is always in a working state. The nitrogen interface 10 supplies nitrogen into the furnace door, and the water leakage detection device 17 and the hydrogen probe should work normally.
When the furnace door is opened, the electric locking structure is firstly unlocked, then the hydraulic jacking mechanism is released, the rebound piece 14 is reset to push the door panel 12 to be disconnected with the furnace door shell, and the door panel 12 is reset.
After the door panel 12 is reset, the lifting mechanism starts to lift the door panel 12, and after the door panel reaches a set height, the lifting is stopped.
Example 2:
the embodiment provides an electric furnace, which comprises a furnace body and the electric furnace door structure of the embodiment 1, wherein a door shell of the electric furnace door structure is hermetically connected to the furnace body.
The furnace door structure can be used in production lines of similar product processes.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the utility model, and these modifications and improvements are also considered to be within the scope of the utility model.
Claims (10)
1. An electric furnace door structure, characterized by comprising: a furnace door shell, a door plate (12), a lifting mechanism and a pressing mechanism,
the lower part of the furnace door shell is provided with a door opening (19) for material to enter and exit,
the door plate (12) is positioned in the furnace door shell, the lifting mechanism is arranged outside the furnace door shell, one end of the lifting mechanism extends into the furnace door shell and is connected with the door plate (12) and used for driving the door plate (12) to move up and down so as to open or close the door opening (19) through the door plate (12),
hold-down mechanism locates outside the furnace door shell, door plant (12) hold-down mechanism's one end dorsad is equipped with seal structure (18) and resilience piece (14), hold-down mechanism's one end stretches into in the furnace door shell and can stretch out and draw back relative to the furnace door shell to exert thrust or remove thrust to door plant (12), work as when hold-down mechanism applys thrust to door plant (12), door plant (12) move towards furnace door shell one side, extremely seal structure (18) crimping is between furnace door shell and door plant (12), just resilience piece (14) are compressed in door plant (12) and with between the furnace door shell, work as hold-down mechanism removes when the thrust to door plant (12), resilience piece (14) reset and remove with promotion door plant (12) and furnace door shell and are connected.
2. The electric furnace door structure according to claim 1, wherein the hold-down mechanism is a plurality of telescopic cylinders, and the plurality of telescopic cylinders are arranged at intervals around the door opening of the furnace door shell; the cylinder barrel of the telescopic cylinder is fixed on the lower part of the outer side wall of the furnace door shell, and the piston rod of the telescopic cylinder penetrates through the outer side wall of the furnace door shell and then extends into the furnace door shell.
3. The electric furnace door structure according to claim 2, characterized in that the plurality of telescopic cylinders comprise a plurality of hydraulic telescopic cylinders (5) and a plurality of electric telescopic cylinders (3), the plurality of hydraulic telescopic cylinders (5) and the plurality of electric telescopic cylinders (3) being alternately arranged around the door opening of the furnace door shell.
4. The electric furnace door structure according to any one of claims 1 to 3, characterized in that the lifting mechanism comprises a motor (8), a winding drum and a rope, the winding drum is arranged in the furnace door shell, one end of the rope is wound on the winding drum, the other end of the rope is connected with the door plate (12), the motor (8) is fixed at the lower part of the outer side wall of the furnace door shell, and a driving shaft of the motor penetrates through the outer side wall of the furnace door shell to extend into the furnace door shell and is in transmission connection with the winding drum.
5. The electric furnace door structure according to any one of claims 1 to 3, characterized in that the door shell is provided with a photoelectric switch (1), the door panel (12) is provided with a sensing piece, and the sensing piece corresponds to the photoelectric switch (1) to open the photoelectric switch (1) when the door panel (12) moves downwards to a lower dead point.
6. The electric furnace door structure according to any one of claims 1 to 3, characterized in that a guide mechanism (13) is provided in the door shell, the guide mechanism (13) being fixedly connected to the door shell for guiding the door panel (12) to move up and down in a linear manner.
7. The electric furnace door structure according to any one of claims 1 to 3, characterized in that a cooling water channel is arranged in the door panel (12), the cooling water channel and a cooling water source outside the furnace door shell form a circulation loop through a pipeline, the pipeline comprises a spiral water pipe (16) arranged in the furnace door shell, and the bottom of the furnace door shell is provided with a water leakage detection device (17).
8. The electric furnace door structure according to any one of claims 1 to 3, characterized in that the top of the furnace door shell is provided with a nitrogen interface (10) and a hydrogen probe interface (11), and the outer side wall of the furnace door shell is provided with a viewing port (7) and an access port (9).
9. The electric furnace door structure according to any one of claims 1 to 3, further comprising a door seat (2), wherein the door shell is supported on the door seat (2) by a support bracket.
10. An electric furnace comprising a furnace body, characterized in that it further comprises an electric furnace door structure according to any one of claims 1 to 9, the door shell of which is sealingly connected to the furnace body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122929343.4U CN216385114U (en) | 2021-11-26 | 2021-11-26 | Electric furnace and furnace door structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122929343.4U CN216385114U (en) | 2021-11-26 | 2021-11-26 | Electric furnace and furnace door structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216385114U true CN216385114U (en) | 2022-04-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122929343.4U Active CN216385114U (en) | 2021-11-26 | 2021-11-26 | Electric furnace and furnace door structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216385114U (en) |
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2021
- 2021-11-26 CN CN202122929343.4U patent/CN216385114U/en active Active
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