CN218290449U - Heat preservation structure of graphitizing furnace - Google Patents
Heat preservation structure of graphitizing furnace Download PDFInfo
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- CN218290449U CN218290449U CN202222916592.4U CN202222916592U CN218290449U CN 218290449 U CN218290449 U CN 218290449U CN 202222916592 U CN202222916592 U CN 202222916592U CN 218290449 U CN218290449 U CN 218290449U
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Abstract
The utility model discloses a heat preservation structure of graphitizing furnace, its structure includes dead lever device and graphitizing furnace, through having set up the dead lever device, the rotation of turning handle among the dead lever device can drive propulsion piece and bottom plate recess contact, and promote graphitizing furnace and left heat preservation wall and the contact of back heat preservation wall, make left side heat preservation wall and back heat preservation wall keep warm to the graphitizing furnace outside, still can fix the graphitizing furnace, make the graphitizing furnace can not take place to remove, avoid leading to the inside normal work that can not normally carry out of graphitizing furnace, through having set up the graphitizing furnace, gas purification structure in the graphitizing furnace can carry out filtration purification to the gas that graphitizing furnace inner wall produced, avoid the outside air to be contaminated, the radiating block in the graphitizing furnace can scatter the heat, make the work efficiency of graphitizing furnace increase more, and the thermal-insulated outer wall in the graphitizing furnace can separate the temperature with the external world, be scalded when avoiding the workman carelessly to contact with the graphitizing furnace outer wall.
Description
Technical Field
The utility model relates to a graphitizing furnace technical field, concretely relates to graphitizing furnace's insulation construction.
Background
The graphitizing furnace is mainly used for sintering and graphitizing carbon materials, graphitizing PI films, graphitizing heat conducting materials, sintering carbon fiber ropes, sintering and graphitizing carbon fiber filaments, purifying graphite powder and processing other materials which can be graphitized in a carbon environment at high temperature, the service temperature of the graphitizing furnace reaches 3000 ℃, the production efficiency is high, energy and electricity are saved, the online temperature measuring and controlling system is arranged, the temperature in the furnace can be monitored in real time, and automatic adjustment can be carried out.
At present, chinese patent No. CN203768029U discloses a high temperature graphitization furnace with heat preservation performance, which is provided with a heating body graphite crucible, a graphite felt heat preservation layer, an electromagnetic induction coil, a stainless steel furnace body with a cooling water interlayer from inside to outside, and a high temperature resistant material is filled in a space between the electromagnetic induction coil and the stainless steel furnace body or between the graphite felt heat preservation layer and the stainless steel furnace body, and the filled high temperature resistant material tightly and completely fills a space between the electromagnetic induction coil and the stainless steel furnace body or between the graphite felt heat preservation layer and the stainless steel furnace body, so that the high temperature graphitization furnace has a better heat preservation effect, and therefore, energy can be effectively utilized during heating, and the temperature distribution inside the furnace body is more uniform, and the yield is effectively improved, but gas generated in the graphitization furnace is difficult to be filtered and purified in the device, and the gas generated in the graphitization furnace cannot pollute the outside air, and the device is difficult to move and fix, so that the graphitization furnace can not normally work due to shift in the graphitization furnace.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In order to overcome prior art not enough, the insulation construction of graphitizing furnace has now been proposed, has solved and has hardly carried out filtration purification to the gas that graphitizing furnace produced, and the gas that hardly ensures to produce in the graphitizing furnace can not pollute outside air, and hardly removes and fixes, makes graphitizing furnace when needs remove, and inconvenient, and hardly fixes graphitizing furnace, makes graphitizing furnace take place the skew to lead to the problem that graphitizing furnace inside can not carry out normal work at the during operation.
(II) technical scheme
The utility model discloses a following technical scheme realizes: the utility model provides a heat preservation structure of graphitizing furnace, including fixed bottom piece, dead lever device and graphitizing furnace, fixed bottom piece rear side left end and left heat preservation wall front side lower extreme fixed connection, left side heat preservation wall rear end and back heat preservation wall front end left side fixed connection, fixed bottom piece top right side and the front end fixed connection in the dead lever device bottom, dead lever device bottom left rear end and graphitizing furnace lower extreme right front side top mutual contact, the dead lever device includes the fixed block, the front end is equipped with the fixed block among the dead lever device, fixed block top middle end is run through and is connected with fixed block pivot upper end rotation by fixed block pivot upper end, fixed block pivot bottom and thread bush top fixed connection, thread bush bottom and the inside middle-end rotation of fixed block are connected, thread bush front and back both sides are run through and with screw rod middle-end threaded connection in by the screw rod, screw rod right front side and back left side fixed connection of turning handle, screw rod left rear side and rotation right front side fixed plate front side fixed connection, both sides are run through and are connected with the axis of rotation in the axis of rotation and are connected by the axis of rotation middle-end about the fixed plate front end and the propelling block top right front end fixed connection bottom fixed block top bottom and front end mutual contact fixed connection fixed block.
Further, the graphitization furnace comprises a graphitization furnace outer wall, a vent pipe and a graphitization furnace inner wall, a bottom plate is arranged at the lower end of the graphitization furnace, wheels are mounted at the bottom of the bottom plate, the top of the bottom plate is fixedly connected with the bottom of the graphitization furnace outer wall, the top end of the interior of the graphitization furnace outer wall is fixedly connected with the top of the gas purification structure, the middle end of the top of the graphitization furnace outer wall is penetrated by the lower end of the vent pipe and is fixedly connected with the lower end of the vent pipe, the bottom of the gas purification structure is fixedly connected with the top of the graphitization furnace inner wall, the outer surface of the graphitization furnace inner wall is fixedly connected with the inner side end of the heat preservation structure, the outer side end of the heat preservation structure is fixedly connected with the inner surface of the graphitization furnace outer wall, and the right front side of the top of the bottom plate is in mutual contact with the left rear end of the bottom of the fixing rod device.
Further, gaseous purification structure includes the filter screen, gaseous purification structure outside end is equipped with heat-proof and cuts off the ring piece, heat-proof cuts off ring piece medial extremity upper end and purification filtration membrane outside end fixed connection, purification filtration membrane bottom and filter screen top fixed connection, filter screen outside end and heat-proof cut off ring piece medial extremity lower extreme fixed connection, heat-proof cuts off ring piece top and the inside top fixed connection of graphitizing furnace outer wall, heat-proof cuts off ring piece bottom and graphitizing furnace inner wall top fixed connection.
Further, the heat preservation structure comprises a heat dissipation block, a heat insulation outer wall is arranged outside the heat preservation structure, the inner side end of the heat insulation outer wall is fixedly connected with the outer side end of the radiation protection wall, the inner side end of the radiation protection wall is fixedly connected with the outer side end of a constant temperature heating block, the inner side end of the constant temperature heating block is fixedly connected with the outer side end of the heat dissipation block, the inner side end of the heat dissipation block is fixedly connected with the outer side end of the inner wall of the graphitization furnace, and the outer side end of the heat insulation outer wall is fixedly connected with the inner surface of the outer wall of the graphitization furnace.
Furthermore, the left rear end and the right front end of the middle end hole in the fixing block are wide, and the middle end of the hole is narrow.
Furthermore, the left rear end of the rotating fixing plate is arc-shaped.
Furthermore, a bottom plate groove is formed in the right front end of the bottom plate, and deep hole grooves are further formed in the lower end of the left side and the lower end of the rear side of the bottom plate groove.
Furthermore, the left end and the right end of the bottom of the filter screen are thick, and the middle end of the bottom of the filter screen is low.
(III) advantageous effects
Compared with the prior art, the utility model, following beneficial effect has:
1) A heat preservation structure of graphitizing furnace, through having set up the dead lever device, the rotation of turning handle among the dead lever device can drive and impel piece and bottom plate recess contact to promote graphitizing furnace and left heat preservation wall and back heat preservation wall contact, make left heat preservation wall and back heat preservation wall keep warm to the graphitizing furnace outside, still can fix the graphitizing furnace, make the graphitizing furnace can not take place to remove, avoid leading to the inside normal clear work of graphitizing furnace.
2) A graphitizing furnace's insulation construction, through having set up graphitizing furnace, gaseous purification structure in the graphitizing furnace can carry out filtration purification to the gas that graphitizing furnace inner wall produced, avoids the outside air to be contaminated, and the radiating block in the graphitizing furnace can scatter the heat for graphitizing furnace's work efficiency more increases, and the thermal-insulated outer wall in the graphitizing furnace can separate the temperature with the external world, is scalded when avoiding the workman carelessly to contact with graphitizing furnace outer wall.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the fixing rod device of the present invention;
fig. 3 is a schematic top view of the fixing rod device of the present invention;
FIG. 4 is a schematic plan view of the inner structure of the graphitization furnace;
fig. 5 is a schematic view of the internal structure of the graphitization furnace of the present invention.
In the figure: the device comprises a fixed bottom block-1, a left heat-insulating wall-2, a rear heat-insulating wall-3, a fixed rod device-4, a fixed block-41, a fixed block rotating shaft-42, a thread sleeve-43, a screw-44, a rotating handle-45, a rotating fixed plate-46, a rotating shaft-47, a propelling block-48, a graphitization furnace-5, a bottom plate-51, a bottom plate groove-511, a wheel-52, a graphitization furnace outer wall-53, a gas purification structure-54, a heat-proof isolation ring block-541, a purification filtering membrane-542, a filtering screen-543, a vent pipe-55, a graphitization furnace inner wall-56, a heat-insulating structure-57, a heat-insulating outer wall-571, a radiation-preventing wall-572, a constant temperature heating block-573 and a heat dissipation block-574.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The first embodiment;
referring to fig. 1, the present invention provides a heat insulation structure of a graphitization furnace: including fixed bottom block 1, dead lever device 4 and graphitizing furnace 5, fixed bottom block 1 rear side left end and 2 front side lower extreme fixed connection of left heat preservation wall, 2 rear ends of left heat preservation wall and 3 front end left side fixed connection of back heat preservation wall, fixed bottom block 1 top right side and dead lever device 4 bottom middle front end fixed connection, dead lever device 4 bottom left rear end and graphitizing furnace 5 lower extreme right front side top in mutual contact.
Please refer to fig. 2 and 3, the utility model provides a heat preservation structure of graphitizing furnace, dead lever device 4 includes fixed block 41, the front end is equipped with fixed block 41 in the dead lever device 4, fixed block 41 top middle-end is run through and is connected with fixed block pivot 42 upper end rotation by fixed block pivot 42 upper end, fixed block pivot 42 bottom and thread bush 43 top fixed connection, thread bush 43 bottom and the inside middle-end rotation of fixed block 41 are connected, thread bush 43 front and back both sides are run through by screw rod 44 middle-end and with screw rod 44 middle-end threaded connection, screw rod 44 right front side and the left rear side fixed connection of turning handle 45, screw rod 44 left rear side and the right front side fixed connection of rotating the fixed plate 46, the middle-end of rotating the upper and lower both sides of fixed plate 46 is run through and is connected with rotating shaft 47 middle-end rotation, rotating shaft 47 upper end runs through impels piece 48 top front end and with impels piece 48 top front end fixed connection, the left rear end and the right front end of the inside middle-end hole of fixed block 41 are wide, the middle-end is narrow, make screw rod 44 can deflect, rotating the left rear end of rotating fixed plate 46 is circular-arc, make it rotate when turning left rear end and right to rotate the fixed plate 46, can not with impels piece together.
Referring to fig. 4 and 5, the present invention provides a heat insulation structure of a graphitization furnace, the graphitization furnace 5 includes a graphitization furnace outer wall 53, a vent pipe 55 and a graphitization furnace inner wall 56, the lower end of the graphitization furnace 5 is provided with a bottom plate 51, wheels 52 are installed at the bottom of the bottom plate 51, the top of the bottom plate 51 is fixedly connected with the bottom of the graphitization furnace outer wall 53, the top of the graphitization furnace outer wall 53 is fixedly connected with the top of a gas purification structure 54, the middle end of the top of the graphitization furnace outer wall 53 is penetrated by the lower end of the vent pipe 55 and is fixedly connected with the lower end of the vent pipe 55, the bottom of the gas purification structure 54 is fixedly connected with the top of the graphitization furnace inner wall 56, the outer surface of the graphitization furnace inner wall 56 is fixedly connected with the inner end of the heat insulation structure 57, the outer end of the heat insulation structure 57 is fixedly connected with the inner surface of the graphitization furnace outer wall 53, the right front end of the bottom plate 51 is provided with a bottom plate groove 511, and the left lower end and the rear end of the bottom plate groove 511 are further provided with deep holes, so that the bottom plate groove 511 can be clamped with the propelling block 48, the gas purification structure 54 comprises a filter screen 543, the outer side end of the gas purification structure 54 is provided with a heat-proof partition ring block 541, the upper end of the inner side end of the heat-proof partition ring block 541 is fixedly connected with the outer side end of the purification filter membrane 542, the bottom of the purification filter membrane 542 is fixedly connected with the top of the filter screen 543, the outer side end of the filter screen 543 is fixedly connected with the lower end of the inner side end of the heat-proof partition ring block 541, the bottom of the heat-proof partition ring block 541 is fixedly connected with the top of the inner wall 56 of the graphitization furnace, the left and right ends of the bottom of the filter screen 543 are thick, the middle end is low, so that the gas inside the inner wall 56 of the graphitization furnace can be filtered by the filter screen 543, the heat preservation structure 57 comprises a heat dissipation block 574, the outer heat-insulation wall 571 is arranged outside the heat preservation structure 57, the inner side end of the outer heat-insulation wall 571 is fixedly connected with the outer side end of the outer radiation-proof wall 572, the inner side end of the radiation-proof wall 572 is fixedly connected with the outer end of the constant temperature heating block 573, the inner end of the constant temperature heating block 573 is fixedly connected with the outer end of the heat dissipation block 574, the inner end of the heat dissipation block 574 is fixedly connected with the outer end of the inner wall 56 of the graphitization furnace, and the outer end of the heat insulation outer wall 571 is fixedly connected with the inner surface of the outer wall 53 of the graphitization furnace.
The second embodiment;
the utility model provides a heat preservation structure of graphitizing furnace, fixed block 41 bottom and 1 top right side fixed connection of fixed bottom piece, impel 48 bottoms and graphitizing furnace 5 lower extreme right front side tops to contact each other, bottom plate 51 top right front side and the left rear end of dead lever device 4 bottom mutually contact, and the heat-proof cuts off ring 541 top and the inside top fixed connection of graphitizing furnace outer wall 53.
The utility model provides a heat preservation structure of a graphitization furnace through improvement, and the working principle is as follows;
firstly, when the equipment is used, the device is firstly placed in a working area, and then the equipment is connected with an external power supply, so that the required electric energy can be provided for the work of the equipment;
secondly, the graphitization furnace 5 is pushed to the right side of the left heat preservation wall 2 and the front side of the rear heat preservation wall 3, then the rotating handle 45 is rotated anticlockwise, the rotating handle 45 rotates to drive the screw 44 to rotate, because the screw 44 is in threaded connection with the threaded sleeve 43, the screw 44 rotates to drive the screw 44 to move towards the left rear end, the screw 44 moves to drive the rotating fixing plate 46 to move, the rotating fixing plate 46 moves to drive the rotating shaft 47 to move, the rotating shaft 47 moves to drive the pushing block 48 to be in contact with the bottom plate groove 511, so that the pushing block 48 enters the hole barrel at the left rear end of the bottom plate groove 511 and pushes the bottom plate 51;
thirdly, the left end of the bottom plate 51 is contacted with the lower end of the right side of the left heat-insulating wall 2, the rear end of the bottom plate 51 is contacted with the lower end of the front side of the rear heat-insulating wall 3, so that the left heat-insulating wall 2 and the rear heat-insulating wall 3 can insulate the outside of the graphitization furnace 5, the graphitization furnace 5 can be fixed, the graphitization furnace 5 cannot move, the problem that the inside of the graphitization furnace cannot normally work due to the fact that the graphitization furnace is shifted when the graphitization furnace needs to be moved and is difficult to move and fix is solved, and the graphitization furnace is difficult to be fixed, so that the graphitization furnace is shifted when working, and the problem that the inside of the graphitization furnace cannot normally work is caused;
fourthly, when gas is generated inside the graphitizing furnace inner wall 56 in the graphitizing furnace 5, the gas enters the filter screen 543 and is filtered by the filter screen 543, then the gas enters the purifying filter membrane 542 from the filter screen 543 and is purified and filtered by the purifying filter membrane 542, so that harmful substances in the gas are prevented from contacting with outside air, and the outside air is polluted, heat in the graphitizing furnace inner wall 56 is transferred to the heat dissipation block 574, the heat dissipation block 574 disperses the heat, so that the positions of the heat dissipation block 574 keep the same temperature, and the inside of the graphitizing furnace inner wall 56 is conveniently kept at the same temperature, so that the working efficiency of the graphitizing furnace 5 is further improved, the constant temperature heating block 573 heats the heat dissipation block 574, and the heat dissipation block 574 is prevented from dissipating excessive heat;
fifth, the radiation protection wall 572 can prevent radiation heat inside the inner wall 56 of the graphitization furnace from being transferred out, and the heat insulation outer wall 571 can isolate the temperature from the outside, so as to insulate the inside of the inner wall 56 of the graphitization furnace, prevent high temperature inside the inner wall 56 of the graphitization furnace from being transferred to the outer wall 53 of the graphitization furnace, prevent workers from being scalded when being inadvertently contacted with the outer wall 53 of the graphitization furnace, and solve the problems that it is difficult to filter and purify gas generated by the graphitization furnace and it is difficult to ensure that the gas generated by the graphitization furnace does not pollute the outside air.
A heat preservation structure of graphitizing furnace, set up dead lever device 4 through optimizing, the rotation of turning handle 45 in the dead lever device 4 can drive the propulsion piece 48 and contact with bottom plate recess 511, and promote graphitizing furnace 5 and left heat preservation wall 2 and the contact of back heat preservation wall 3, make left heat preservation wall 2 and back heat preservation wall 3 keep warm to graphitizing furnace 5 outside, still can fix graphitizing furnace 5, make graphitizing furnace 5 can not take place to remove, avoid leading to graphitizing furnace 5 inside can not normally work, through having set up graphitizing furnace 5, gas purification structure 54 in graphitizing furnace 5 can carry out filtration purification to the gas that graphitizing furnace inner wall 56 produced, prevent harmful substance and outside air contact in the gas, lead to outside air to be polluted, heat dissipation piece 574 in graphitizing furnace 5 can scatter the heat, conveniently make graphitizing furnace inner wall 56 inside keep the same temperature, make graphitizing furnace 5's work efficiency more increase, and thermal-insulated outer wall 571 in the graphitizing furnace 5 can separate the temperature from the outside world, by graphitization furnace inner wall 53 when avoiding workman is not careful.
Claims (9)
1. The heat insulation structure of the graphitization furnace comprises a fixed bottom block (1), wherein the left end of the rear side of the fixed bottom block (1) is fixedly connected with the lower end of the front side of a left heat insulation wall (2), and the rear end of the left heat insulation wall (2) is fixedly connected with the left side of the front end of a rear heat insulation wall (3);
the method is characterized in that: still include dead lever device (4) and graphitizing furnace (5), front end fixed connection in dead lever device (1) top right side and dead lever device (4) bottom, dead lever device (4) bottom left rear end and graphitizing furnace (5) lower extreme right front side top contact each other, dead lever device (4) includes fixed block (41), the front end is equipped with fixed block (41) in dead lever device (4), fixed block (41) top middle-end is run through and is connected with fixed block pivot (42) upper end rotation by fixed block pivot (42) upper end, fixed block pivot (42) bottom and thread bush (43) top fixed connection, thread bush (43) bottom is connected with fixed block (41) inside middle-end rotation.
2. The heat insulating structure of a graphitization furnace as claimed in claim 1, wherein: dead lever device (4) still include rotation fixed plate (46), both sides are run through by front end in screw rod (44) and with screw rod (44) front end threaded connection around thread bush (43), screw rod (44) right side front side and turning handle (45) left side rear side fixed connection, screw rod (44) left side rear side and rotation fixed plate (46) right side front side fixed connection, rotation fixed plate (46) upper and lower both sides middle-end is run through by axis of rotation (47) middle-end and is connected with axis of rotation (47) middle-end rotation, axis of rotation (47) upper end is run through and is advanced piece (48) top front end and with advance piece (48) top front end fixed connection, advance piece (48) bottom and graphitizing furnace (5) lower extreme right side top mutual contact, fixed block (41) bottom and fixed end piece (1) top right side fixed connection.
3. The heat insulating structure of a graphitization furnace as claimed in claim 1, wherein: the graphitization furnace (5) comprises a graphitization furnace outer wall (53), a vent pipe (55) and a graphitization furnace inner wall (56), a bottom plate (51) is arranged at the lower end of the graphitization furnace (5), wheels (52) are mounted at the bottom of the bottom plate (51), the top of the bottom plate (51) is fixedly connected with the bottom of the graphitization furnace outer wall (53), the top end of the interior of the graphitization furnace outer wall (53) is fixedly connected with the top of a gas purification structure (54), the middle end of the top of the graphitization furnace outer wall (53) is penetrated by the lower end of the vent pipe (55) and is fixedly connected with the lower end of the vent pipe (55), the bottom of the gas purification structure (54) is fixedly connected with the top of the graphitization furnace inner wall (56), the outer surface of the graphitization furnace inner wall (56) is fixedly connected with the inner side end of a heat preservation structure (57), the outer side of the heat preservation structure (57) is fixedly connected with the inner surface of the graphitization furnace outer wall (53), and the right front side of the top of the bottom plate (51) is mutually contacted with the left rear end of the bottom of the fixing rod device (4).
4. The heat insulating structure of a graphitization furnace as claimed in claim 3, wherein: gaseous purification structure (54) include filter screen (543), gaseous purification structure (54) outside end is equipped with heat-proof and cuts off ring piece (541), heat-proof cuts off ring piece (541) medial extremity upper end and purifies filtration membrane (542) outside end fixed connection, purify filtration membrane (542) bottom and filter screen (543) top fixed connection, filter screen (543) outside end and heat-proof cut off ring piece (541) medial extremity lower extreme fixed connection, heat-proof cuts off ring piece (541) top and graphitized furnace wall (53) inside top fixed connection, heat-proof cuts off ring piece (541) bottom and graphitized furnace inner wall (56) top fixed connection.
5. The heat insulating structure of a graphitization furnace as claimed in claim 3, wherein: the heat preservation structure (57) comprises a heat dissipation block (574), a heat insulation outer wall (571) is arranged outside the heat preservation structure (57), the inner side end of the heat insulation outer wall (571) is fixedly connected with the outer side end of a radiation protection wall (572), the inner side end of the radiation protection wall (572) is fixedly connected with the outer side end of a constant temperature heating block (573), the inner side end of the constant temperature heating block (573) is fixedly connected with the outer side end of the heat dissipation block (574), the inner side end of the heat dissipation block (574) is fixedly connected with the outer side end of an inner wall (56) of the graphitization furnace, and the outer side end of the heat insulation outer wall (571) is fixedly connected with the inner surface of the outer wall (53) of the graphitization furnace.
6. The heat insulating structure of a graphitization furnace as claimed in claim 1, wherein: the left rear end and the right front end of the middle end hole in the fixing block (41) are wide, and the middle end is narrow.
7. The heat insulating structure of a graphitization furnace as claimed in claim 2, wherein: the left rear end of the rotary fixing plate (46) is arc-shaped.
8. The heat insulating structure of a graphitization furnace as claimed in claim 3, wherein: the bottom plate (51) is provided with a bottom plate groove (511) at the right front end, and deep hole grooves are further formed in the lower end of the left side and the lower end of the rear side of the bottom plate groove (511).
9. The heat insulating structure of a graphitization furnace as claimed in claim 4, wherein: the left end and the right end of the bottom of the filter screen (543) are thick, and the middle end is low.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222916592.4U CN218290449U (en) | 2022-11-02 | 2022-11-02 | Heat preservation structure of graphitizing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222916592.4U CN218290449U (en) | 2022-11-02 | 2022-11-02 | Heat preservation structure of graphitizing furnace |
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| CN218290449U true CN218290449U (en) | 2023-01-13 |
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| CN202222916592.4U Active CN218290449U (en) | 2022-11-02 | 2022-11-02 | Heat preservation structure of graphitizing furnace |
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