CN210560802U - Intelligent crust breaking device for electrolytic bath - Google Patents
Intelligent crust breaking device for electrolytic bath Download PDFInfo
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- CN210560802U CN210560802U CN201921605725.8U CN201921605725U CN210560802U CN 210560802 U CN210560802 U CN 210560802U CN 201921605725 U CN201921605725 U CN 201921605725U CN 210560802 U CN210560802 U CN 210560802U
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- crust breaking
- heat conducting
- rod
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- 238000001816 cooling Methods 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims description 22
- 238000005868 electrolysis reaction Methods 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000017525 heat dissipation Effects 0.000 description 8
- 239000003792 electrolyte Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
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Abstract
An intelligent crust breaking device for an electrolytic cell belongs to the technical field of production control of the aluminum electrolytic cell. The device comprises a crust breaking hammer head and a hammer rod; the hammer stem is of a hollow structure with a cooling air inlet and a cooling air outlet, the hammer stem is provided with a radiating fin, a heat conducting rod is arranged inside the hammer stem, one end of the heat conducting rod is embedded in the crust breaking hammer head, and the other end of the heat conducting rod is connected with the hammer stem and used for guiding heat of the crust breaking hammer head to the radiating fin. The intelligent crust breaking device for the electrolytic bath can effectively reduce the temperature of the crust breaking hammer head, thereby greatly reducing the probability of occurrence of package sticking of the hammer head and effectively reducing the labor capacity of workers.
Description
Technical Field
The utility model relates to the technical field of aluminum electrolytic cell production control, in particular to an intelligent crust breaking device for an electrolytic cell.
Background
With the development of the electrolytic aluminum industry, the production environment and labor intensity of the electrolytic cell are obviously inferior to those of other industries. The main points are as follows: the electrolytic aluminum industry has high environmental temperature and high dust content in the environment. Moreover, because the automation level of the specificity of the home and abroad electrolytic cell production is low, a great deal of work needs to be completed by a great deal of manpower, and the efficiency is low, which is mainly shown in the following two aspects: firstly, the method comprises the following steps: the material port of the electrolytic cell is easy to block, and the existing control system cannot directly detect the blocked material port in the first time, so that the subsequent manual treatment is difficult and extremely large; secondly, the method comprises the following steps: the hammer head of the electrolytic cell needs to frequently contact with electrolyte in the electrolytic cell, the electrolyte is easy to stick on the hammer head, a sticky bag with high hardness is formed, a material opening is easy to block due to the sticky bag, and meanwhile, a worker needs to manually break the sticky bag on the hammer head.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem that prior art exists, the utility model provides an intelligent crust breaking device for electrolysis trough can effectively reduce the temperature of crust-breaking tup to greatly reduce the tup and be stained with package emergence probability, reduce workman's amount of labour effectively.
In order to realize the purpose, the technical scheme of the utility model is that:
an intelligent crust breaking device for an electrolytic bath comprises a crust breaking hammer head and a hammer rod;
the hammer stem is of a hollow structure with a cooling air inlet and a cooling air outlet, the hammer stem is provided with a radiating fin, a heat conducting rod is arranged inside the hammer stem, one end of the heat conducting rod is embedded in the crust breaking hammer head, and the other end of the heat conducting rod is connected with the hammer stem and used for guiding heat of the crust breaking hammer head to the radiating fin.
The inside tup temperature indicating dial that still is provided with of hammer stem, tup temperature indicating dial is connected with temperature sensor, temperature acquisition module and controller in proper order, temperature sensor and temperature acquisition module gather tup temperature indicating dial and input the controller, the controller is judged the temperature of gathering, confirms the aperture of material mouth, the controller adopts singlechip or PLC.
The tup temperature dial includes heat conduction dish, one side of heat conduction dish with the crust-breaking tup is connected, the opposite side of heat conduction dish with temperature sensor connects, and temperature sensor gathers the temperature of heat conduction dish, the mode that temperature sensor gathered heat conduction dish temperature is contact or non-contact, and wherein, non-contact adopts infrared collection.
The hammer temperature indicating disc further comprises a heat conducting rod, one end of the heat conducting rod is embedded in the crust breaking hammer, and the other end of the heat conducting rod is connected with one side of the heat conducting disc and used for timely guiding the temperature of the crust breaking hammer to the heat conducting disc.
The heat conductivity coefficient of the heat conducting rod is larger than that of the crust breaking hammer.
The cooling air inlet is connected with a cooling air source, and a cooling air valve is arranged on a connecting pipeline of the cooling air inlet and used for realizing the quick cooling of the crust breaking hammer head.
The shape of the crust breaking hammer head is a cone frustum shape or a cylinder shape, and the outer shape of the hammer rod is a cylinder shape or a cuboid shape.
The heat radiating fins are arranged outside or inside the hammer rod.
The heat conductivity coefficient of the heat conducting rod is larger than that of the crust breaking hammer.
The intelligent crust breaking device for the electrolytic cell further comprises a V-shaped cover, wherein a hammer head opening is formed in the V-shaped cover, and the diameter of the hammer head opening is larger than that of the hammer rod or the diameter of the external radiating fin of the hammer rod.
The utility model has the advantages that:
1) the hammer rod is provided with the cooling air inlet, the cooling air outlet, the radiating fins and the heat conducting rod, so that the temperature of the crust breaking hammer head can be effectively reduced, the probability of the crust breaking hammer head adhering to a bag is greatly reduced, and the labor capacity of workers is effectively reduced;
2) detect crust-breaking tup temperature through temperature sensor, and judge through the singlechip, can reflect whether the crust-breaking tup breaks through the shell face, get into in the electrolyte, thereby judge whether the aperture of material mouth is unblocked promptly, provide reliable guarantee for the alumina concentration accurate control of electrolysis trough, at the electrolysis aluminium high temperature, high dust, in the environment of high magnetic field, compare in other detection methods, this application gathers real-time judgement in real time, it is high to detect the precision, good reliability, operation maintenance is simple, economic nature is good, make intelligent crust-breaking device for electrolysis trough can observe, steerable.
Additional features and advantages of the invention will be set forth in part in the detailed description which follows.
Drawings
Fig. 1 is a schematic structural diagram of a crust breaking device for an intelligent electrolytic tank according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating a connection between a heat conduction rod and a crust breaking hammer head according to an embodiment of the present invention;
fig. 3 is a schematic view of a hammer head temperature indicating plate provided by the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a hammer rod according to an embodiment of the present invention;
fig. 5 is a flowchart of the operation of the temperature sensor, the temperature acquisition module and the controller provided in the embodiment of the present invention.
Reference numerals in the drawings of the specification include:
the heat conduction device comprises a heat conduction rod 1, a crust breaking hammer head 2, a heat conduction rod 3, a heat conduction disc 4, a heat radiating fin 5, a cooling air inlet 6, a cooling air outlet 7, a temperature sensor 8, a temperature acquisition module 9, a cooling air valve 10, a cooling air source 11, a controller 12, a V-shaped cover 13 and a hammer head hole 14.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In order to solve the problem that prior art exists, as shown in fig. 1 to 5, the utility model provides an intelligent crust breaking device for electrolysis trough, the temperature of crust breaking tup 2 that can effectively reduce to greatly reduce the tup and be stained with package emergence probability, reduce workman's amount of labour effectively.
As shown in fig. 1 and 2, the intelligent crust breaking device for the electrolytic bath comprises a crust breaking hammer head 2 and a hammer rod;
the hammer stem is for being provided with cooling air entry 6 and 7 hollow structure in cooling air export, the hammer stem is provided with fin 5, the inside heat conduction stick 1 that is provided with of hammer stem, the one end of heat conduction stick 1 inlays in crust-breaking tup 2, and the other end and the hammer stem of heat conduction stick 1 are connected for on leading crust-breaking tup 2's heat to fin 5. The shape of the crust breaking hammer head 2 is a cone frustum shape or a cylinder shape, and the external shape of the hammer rod is a cylinder shape or a cuboid shape. The heat sink 5 is disposed outside or inside the hammer rod. The heat conductivity coefficient of the heat conducting rod 1 is larger than that of the crust breaking hammer 2.
The crust breaking hammer head 2 and the hammer rod are connected with a U-shaped connector of an existing aluminum electrolysis cell cylinder, and an aluminum electrolysis cell bath control system sends out an instruction to form a crust breaking action. The crust breaking hammer head 2 can adopt a special-shaped hammer head with a narrow front end and a wide rear end, such as a cone frustum shape, and can also directly adopt a cylindrical shape, and the material of the special-shaped hammer head is the hammer head material selected in the existing electrolytic aluminum industry. In this embodiment, heat conduction rod 1 is embedded in the upper end of crust-breaking hammer head 2, and heat conduction rod 1 is the rod that the material production that adopts coefficient of heat conductivity to be greater than crust-breaking hammer head 2 material formed, for example adopts pure copper material to improve heat conduction efficiency. The quantity of heat conduction stick 1 can be confirmed according to 2 sizes of crust-breaking tup and the size of heat conduction stick 1, and 2 big so heat conduction stick 1's of crust-breaking tup quantity is just many, and the length of heat conduction stick 1 is confirmed by the length of hammer stem, and its length is not more than the length of hammer stem can. The heat conducting rod 1 is connected with the hammer rod, the heat conducting rod 1 can be welded with the inner wall of the hammer rod, and can also penetrate through the outer wall of the hammer rod to be directly connected with the radiating fins 5 on the outer wall.
As shown in fig. 1 and 4, the hammer rod is a hollow rod with a hollow interior, the bottom of the hollow rod is connected with the top of the crust breaking hammer head 2 by welding, the hammer rod is a heat dissipation type hammer rod with a heat dissipation function, the heat dissipation fins 5 can be installed on the outer wall or the inner wall of the hammer rod by a connection method in the prior art, such as welding, or the hammer rod and the heat dissipation fins 5 are manufactured by an integral forming method, the number and the shape of the heat dissipation fins 5 on the hammer rod are determined according to the installation size on site, the heat dissipation fins 5 can be installed in a direction parallel to the horizontal plane (as shown in fig. 4) or perpendicular to the horizontal plane, or installed in an oblique angle manner, and the heat conductivity coefficient of the heat dissipation fins 5 is greater than or equal. The upper part of the hammer stem is provided with a cooling air inlet 6 for accessing high-pressure low-temperature air; the lower part of the hammer rod is provided with a cooling air outlet 7 for exhausting air.
The cooling air inlet 6 is connected with a cooling air source 11, and a cooling air valve 10 is arranged on a connecting pipeline of the cooling air inlet for realizing the rapid cooling of the crust breaking hammer head 2. The cooling air inlet 6 is connected with a cooling air source 11 through a high-pressure air pipe, when the controller 12 judges that the temperature of the crust-breaking hammer head 2 collected by the temperature sensor 8 is higher than a set threshold value, the cooling air valve 10 arranged on the high-pressure air pipe is controlled to be automatically opened, cooling air enters the hammer rod through the cooling air inlet 6 and then is discharged through the cooling air outlet 7, and therefore the quick cooling of the crust-breaking hammer head 2 is achieved.
The inside tup temperature indicating dial that still is provided with of hammer stem, tup temperature indicating dial is connected with temperature sensor 8, temperature acquisition module 9 and controller 12 in proper order, temperature sensor 8 and temperature acquisition module 9 gather the temperature of tup temperature indicating dial and input controller 12, controller 12 judges the temperature of gathering, confirms the aperture of material mouth, controller 12 adopts singlechip or PLC.
As shown in fig. 3, the hammer temperature indicating dial includes heat conduction dish 4, one side of heat conduction dish 4 with crust-breaking hammer 2 is connected, the opposite side of heat conduction dish 4 with temperature sensor 8 is connected, and temperature sensor 8 gathers the temperature of heat conduction dish 4, the mode that temperature sensor 8 gathered the temperature of heat conduction dish 4 is contact or non-contact, and wherein, non-contact adopts infrared ray collection. The hammer temperature indicating disc further comprises a heat conducting rod 3, one end of the heat conducting rod 3 is embedded in the crust breaking hammer 2, and the other end of the heat conducting rod 3 is connected with one side of the heat conducting disc 4 and used for timely guiding the temperature of the crust breaking hammer 2 to the heat conducting disc 4. The heat conductivity coefficient of the heat conducting rod 3 is larger than that of the crust breaking hammer 2.
The hammer temperature indicating disc is composed of a heat conducting rod 3 and a heat conducting disc 4, or the heat conducting disc 4 is only adopted to directly attach the heat conducting disc 4 to the crust breaking hammer 2. In this embodiment, heat conduction pole 3 and heat conduction dish 4 all adopt the coefficient of heat conductivity to be greater than the material production of crust-breaking tup 2 material and form, for example adopt pure copper material to improve heat conduction efficiency, heat conduction dish 4 is circular or square, on heat conduction pole 3 was used for in time transmitting heat conduction dish 4 with the temperature of crust-breaking tup 2, the temperature of heat conduction dish 4 was gathered through temperature sensor 8. In this embodiment, the temperature sensor 8, the temperature acquisition module 9 and the controller 12 all adopt the prior art, the model of the temperature sensor 8 is WRNK-191K type thermocouple, the model of the temperature acquisition module 9 is dam-3058, the model of the single chip microcomputer is STM32, the model of the PLC is siemens 200smart, the temperature sensor 8 is used for acquiring the temperature of the hammer head temperature indicating disc, namely the real-time temperature of the crust breaking hammer head 2, and the temperature sensor can also be composed of a temperature sensing module, an external lead and a high temperature resistant flame retardant glass fiber sleeve wrapping the lead, the temperature sensor 8 can be a contact type or a non-contact type such as infrared ray, if the temperature sensor is a contact type, the temperature sensor 8 is directly installed on the hammer head temperature indicating disc, if the non-contact type is adopted, the temperature sensor 8 needs to be vertically (right) installed on the hammer head temperature indicating disc, namely, the temperature sensor 8 collects the temperature of the heat conducting disc 4 in a contact or non-contact manner, wherein the non-contact manner adopts infrared ray collection.
As shown in fig. 5, the temperature of the hammer head temperature indicating disc, namely the temperature of the crust breaking hammer head 2, is acquired through a temperature sensor 8, and is expressed by the hammer head temperature, a 4-20 milliampere signal is generated by the temperature sensor 8, the 4-20 milliampere signal is converted into a digital signal by a temperature acquisition module 9 and is transmitted to a single chip microcomputer or a Programmable Logic Controller (PLC), the judgment is carried out through the single chip microcomputer or the PLC, if the hammer head temperature is larger than or equal to a set threshold value, a cooling air valve 10 is opened to rapidly cool the crust breaking hammer head 2, whether the hammer head temperature is within a control range is continuously judged, and if the hammer head temperature is within the; if the temperature of the hammer head is not in the control range, judging that the material port is in a closed state and reducing the feeding speed if the acquired temperature is lower than the lower limit value of the control range; if the temperature of the hammer head is higher than the upper limit value of the control range, the material opening is judged to be in an open state, and the feeding speed is increased. The control range and the threshold are determined according to different electrolytic cells, for example, the control range is 200-550 degrees, and the threshold is 500 degrees. When the material port is in a closed state, the crust breaking hammer 2 is required to enter the electrolyte through multiple crust breaking actions, and if the crust breaking is carried out for multiple times, the material port cannot be opened, the material port blockage alarm can be sent out; when the material port is in an open state, the material port is unobstructed, the crust-breaking hammer head 2 extends into the electrolyte, and when the crust-breaking hammer head 2 breaks the crust next time, the crust-breaking hammer head 2 can return when touching the electrolyte. The opening time of the cooling air valve 10 is set within a set range, for example, the cooling air valve 10 is opened for at most 5 minutes each time, if the cooling air valve 10 is opened for 5 minutes, the temperature of the hammer head is not reduced, and a hammer head overheating alarm can be sent out.
The intelligent crust breaking device for the electrolytic cell further comprises a V-shaped cover 13, the V-shaped cover 13 is provided with hammer head open holes 14, and the diameter of the hammer head open holes 14 is larger than that of the hammer rod or the diameter of the external radiating fins 5 of the hammer rod. If the heat radiating fins 5 are not arranged outside the hammer rod, the aperture of the through hole is larger than the diameter of the hammer rod; if the radiating fins 5 are arranged outside the hammer rod, the diameter of the through hole is larger than that of the radiating fins 5 outside the hammer rod, so that the heat dissipation of the bridge device is ensured, and the V-shaped cover 13 except the through hole can be in the structure of the V-shaped cover 13 of the electrolytic cell in the prior art.
The above embodiments are only used to illustrate the technical solution of the present invention, and are not used to limit the present invention, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An intelligent crust breaking device for an electrolytic bath is characterized by comprising a crust breaking hammer head and a hammer rod;
the hammer stem is of a hollow structure with a cooling air inlet and a cooling air outlet, the hammer stem is provided with a radiating fin, a heat conducting rod is arranged inside the hammer stem, one end of the heat conducting rod is embedded in the crust breaking hammer head, and the other end of the heat conducting rod is connected with the hammer stem and used for guiding heat of the crust breaking hammer head to the radiating fin.
2. The intelligent crust breaking device for the electrolytic cell as claimed in claim 1, wherein a hammer head temperature indicating disc is further arranged inside the hammer rod, the hammer head temperature indicating disc is sequentially connected with a temperature sensor, a temperature acquisition module and a controller, the temperature sensor and the temperature acquisition module acquire the temperature of the hammer head temperature indicating disc and input the temperature to the controller, the controller judges the acquired temperature and determines the opening degree of the material opening, and the controller adopts a single chip microcomputer or a PLC.
3. An intelligent crust breaking device for an electrolytic bath according to claim 2, wherein the hammer temperature indicating disc comprises a heat conducting disc, one side of the heat conducting disc is connected with the crust breaking hammer, the other side of the heat conducting disc is connected with the temperature sensor, the temperature sensor collects the temperature of the heat conducting disc in a contact or non-contact manner, and infrared ray collection is adopted in the non-contact manner.
4. An intelligent crust breaking device for an electrolytic bath as recited in claim 3, wherein the hammer temperature indicating plate further comprises a heat conducting rod, one end of the heat conducting rod is embedded in the crust breaking hammer, and the other end of the heat conducting rod is connected with one side of the heat conducting plate for timely guiding the temperature of the crust breaking hammer to the heat conducting plate.
5. A smart chaffer for an electrolysis cell according to claim 4, wherein the heat-conducting rod has a thermal conductivity greater than that of the crust-breaking hammer.
6. An intelligent crust breaking device for an electrolytic bath as claimed in claim 1 or 2, wherein the cooling air inlet is connected with a cooling air source, and a cooling air valve is arranged on a connecting pipeline of the cooling air inlet for realizing rapid cooling of the crust breaking hammer head.
7. A smart chaffer for an electrolysis cell according to claim 1 or 2, wherein the shape of the crust-breaking chip is a truncated cone or a cylinder, and the external shape of the hammer rod is a cylinder or a cuboid.
8. A smart chaff dispenser for electrolysis cells according to claim 1 or 2, wherein the heat sink is provided externally or internally of the hammer stem.
9. A smart chaffer for an electrolysis cell according to claim 1 or claim 2, wherein the heat-conducting rod has a thermal conductivity greater than that of the crust-breaking hammer head.
10. A crust breaking device for intelligent electrolytic tanks according to claim 1 or 2, further comprising a V-shaped cover, wherein the V-shaped cover is provided with a hammer head opening, and the diameter of the hammer head opening is larger than the diameter of the hammer rod or the external radiating fins of the hammer rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921605725.8U CN210560802U (en) | 2019-09-25 | 2019-09-25 | Intelligent crust breaking device for electrolytic bath |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921605725.8U CN210560802U (en) | 2019-09-25 | 2019-09-25 | Intelligent crust breaking device for electrolytic bath |
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| CN210560802U true CN210560802U (en) | 2020-05-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114703510A (en) * | 2022-04-08 | 2022-07-05 | 遵义铝业股份有限公司 | Method and device for cooling striking hammer head |
| CN115142092A (en) * | 2022-07-22 | 2022-10-04 | 中铝郑州有色金属研究院有限公司 | Aluminum cell electrolyte temperature detection system and method |
-
2019
- 2019-09-25 CN CN201921605725.8U patent/CN210560802U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114703510A (en) * | 2022-04-08 | 2022-07-05 | 遵义铝业股份有限公司 | Method and device for cooling striking hammer head |
| CN115142092A (en) * | 2022-07-22 | 2022-10-04 | 中铝郑州有色金属研究院有限公司 | Aluminum cell electrolyte temperature detection system and method |
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Effective date of registration: 20240813 Address after: Room 224, No. 153-2 (3 gates), Chuangxin Road, Shenyang District, China (Liaoning) Pilot Free Trade Zone, 110000 Shenyang, Liaoning Patentee after: Shenyang WOPO Technology Co.,Ltd. Country or region after: China Address before: No. 117 Nanjing South Street, Heping District, Shenyang City, Liaoning Province 110166 1-14-04 Patentee before: Chen Zhaona Country or region before: China |
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