CN216205359U - Torpedo tank feeding system with scrap steel preheating function - Google Patents
Torpedo tank feeding system with scrap steel preheating function Download PDFInfo
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- CN216205359U CN216205359U CN202122560680.0U CN202122560680U CN216205359U CN 216205359 U CN216205359 U CN 216205359U CN 202122560680 U CN202122560680 U CN 202122560680U CN 216205359 U CN216205359 U CN 216205359U
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Abstract
The utility model discloses a torpedo ladle feeding system with a scrap steel preheating function, which comprises a feeding section and a feeding section which are sequentially arranged on a support frame platform, wherein a steel grabbing machine is arranged on the feeding section in a matching manner, a heating section is arranged between the feeding section and the feeding section, the feeding section and the heating section are both positioned on a vibration conveying mechanism, the heating section is provided with a cover body for wrapping the vibration conveying mechanism, a combustion system is arranged on the cover body, the feeding section comprises a weighing mechanism arranged at the end part of the cover body, the weighing mechanism vertically corresponds to a running track of a torpedo ladle, the steel grabbing machine, the vibration conveying mechanism, the combustion system and the weighing mechanism are all connected with a control system, and the control system is connected with a gate mechanism for controlling the bottom of the weighing mechanism to open and close. The torpedo ladle scrap steel preheating equipment has the functions of scrap steel conveying, scrap steel preheating and quantitative feeding, also has the functions of water cooling and temperature reduction and picture monitoring control, and can monitor pictures of a vibration conveying system, pictures of a water cooling system and pictures of a combustion system.
Description
Technical Field
The utility model relates to the technical field of torpedo tank feeding, in particular to a torpedo tank feeding system with a scrap steel preheating function.
Background
The torpedo car is a horizontally long torpedo-type hot metal ladle used by a large blast furnace, and is also called a torpedo car. Because the torpedo tank is large in capacity, a plurality of operation points for adding the waste steel into the torpedo tank are needed, and the waste steel is required to be quantitatively added into the torpedo tank by each operation point so as to meet the capacity of the torpedo tank and ensure safety. Firstly, a filling opening needs to be opened for multiple times, more heat is lost, not only can the newly added waste steel absorb the heat in the torpedo tank, but also the heat in the torpedo tank can be dissipated from the filling opening which is opened for multiple times, and more polluting gas can be dissipated from the torpedo tank; secondly, high-temperature molten iron or scrap iron blocks are filled in the torpedo tank, and the safety risk is inevitably increased by the repeated opening operation of the filling opening; in addition, the scrap steel is added to the torpedo at a plurality of operation points in batches, and a plurality of preparation and calibration works are required, so that the construction efficiency is inevitably reduced.
Disclosure of Invention
Aiming at the defects in the background art, the utility model provides a torpedo tank feeding system with a scrap steel preheating function, and solves the technical problems of high heat consumption and low construction efficiency of the conventional torpedo tank waste adding system.
The technical scheme of the utility model is realized as follows: the utility model provides a torpedo jar feed system with scrap steel preheats function, is provided with including arranging the reinforced section on the support frame platform in proper order and throws the material section, is provided with reinforced section cooperation and grabs the steel machine, reinforced section and throw and be provided with the heating section between the material section, reinforced section and heating section all are located the defeated material mechanism of vibration, and the heating section is provided with the cover body of the defeated material mechanism of parcel vibration, is provided with combustion system on the cover body, throw the material section including setting up the weighing mechanism at cover body tip, weighing mechanism corresponds from top to bottom with the orbit of torpedo jar, grab steel machine, vibrate defeated material mechanism, combustion system and weighing mechanism and all link to each other with control system, and control system is connected with the gate mechanism that the bottom of control weighing mechanism opened and shut.
Further, the vibration conveying mechanism comprises a vibrator arranged at the tail of the support frame platform, the vibrator is connected with a vibrator connecting plate, the vibrator connecting plate is connected with a feeding groove located above the support frame platform, and a transverse damping device is arranged between the feeding groove and the support frame platform.
Furthermore, the combustion system comprises burners arranged on the cover body, the burners are connected with an air supply pipeline, a main pipe of the air supply pipeline is provided with a gate valve, a gas flowmeter, a pressure transmitter and a running-in pressure gauge, the gate valve is connected with a control system, the gas flowmeter, the pressure transmitter and the running-in pressure gauge are connected with branch pipes, the branch pipes are respectively connected with the burners, and the branch pipes are provided with an electric/pneumatic control valve and a manual butterfly valve, wherein the electric/pneumatic control valve and the manual butterfly valve are connected with the control system.
Further, the cover body is connected with a smoke exhaust system, the smoke exhaust system comprises a smoke pipeline connected with the cover body, and the smoke pipeline is connected with a dust removal system of a steel mill through a water-cooling heat exchanger.
Furthermore, the cover body is connected with a temperature measuring device, the temperature measuring device is controlled by a control system and a combustion system in an interlocking mode, and a quick-cutting valve and an alarm device which are connected with the control system are arranged on the air supply pipeline.
Further, the heating section is provided with water cooling system, and water cooling system includes always intake pipe and the total return water pipeline of cooling water with the cooling water, and the total intake pipe of cooling water links to each other through the cooling water branch road with the total return water pipeline of cooling water between, and the cooling water is always intake pipe and is equipped with pressure transmitter and thermocouple, is equipped with flowmeter, pressure transmitter and thermocouple on the total return water pipeline of cooling water, is equipped with hose, flow switch, stop valve on every cooling water branch road.
Furthermore, the weighing mechanism comprises a weighing sensor arranged at the bottom of the chute, signals of the weighing sensor are interlocked with the vibration material conveying mechanism through a control system, and when the weight reaches a preset value, the control system controls the vibration material conveying mechanism to stop feeding.
Furthermore, the control system is connected with a control picture display unit, and the control picture display unit comprises a vibration conveying system picture display, a water cooling system picture display and a combustion system monitoring picture display.
The torpedo ladle scrap steel preheating equipment has the functions of scrap steel conveying, scrap steel preheating and quantitative feeding, and is divided into two sections: a feeding section and a heating section. The feeding section is a part for receiving the steel scraps, the electromagnetic crane or the steel grabbing machine adds the steel scraps into the feeding section, and the received steel scraps are conveyed to the heating section under the action of vibration force. The heating section is a tunnel-shaped channel with the top of a square heat-insulating cover, the discharge end of the channel is connected with a weighing hopper, the upper part of the tunnel is provided with a heating source, the fuel adopts blast furnace gas, the flame direction is downward, the waste steel is favorably and rapidly heated, and the heating capacity of the waste steel is effectively controlled by controlling the adding amount of the gas and the transmission speed, so that the waste steel is matched with the subsequent production. And discharging the preheated scrap steel into a weighing hopper at the discharge end. The utility model also has the functions of water cooling and temperature reduction and picture monitoring control, and can monitor pictures of the vibration conveying system, pictures of the water cooling system and pictures of the combustion system.
Drawings
In order to illustrate the embodiments of the utility model more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort.
FIG. 1 is a schematic side view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 1;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 5 is a cross-sectional view taken along plane C-C of FIG. 1;
wherein:
1. a feeding section 100, a support frame platform 101, a steel grabbing machine 102 and a material groove;
2. a feeding section 201, a weighing mechanism 202 and a gate mechanism;
3. a heating section 301, a cover body 302, a burner nozzle 303, a gas supply pipeline 304, a flue gas pipeline 305 and a water-cooling heat exchanger;
4. a vibration conveying mechanism 401, a vibrator 402, a vibrator connecting plate 403 and a transverse damping device;
5. the torpedo tank comprises a torpedo tank 501, a cooling water main water inlet pipeline 502 and a cooling water main water return pipeline.
Detailed Description
The technical solutions 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 it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
A torpedo ladle feeding system with scrap steel preheating function is shown in figures 1-5 and comprises a supporting frame platform 100 fixed on a base platform and a cover body 301 used for supporting a vibration conveying mechanism 4 and insulating the vibration conveying mechanism 4. The support frame platform 100 is composed of i-steel, channel steel, steel plates, railings and the like. The charging skirt is located behind the dynamic seal and used for charging and reversing, and the charging skirt is a steel structural part.
The support frame platform 100 is sequentially provided with a feeding section 1, a heating section 3 and a feeding section 2, and the feeding section 1 and the heating section 3 are both positioned on the vibration material conveying mechanism 4. Be provided with reinforced section 1 cooperation and grab steel machine 101, grab steel machine 101 and transport steel to reinforced section 1 top, under the effect of the defeated material mechanism 4 of vibration again, the steel in the reinforced section 1 is automatic to heating section 3 and throw material section 2 and carry.
The vibration conveying mechanism 4 comprises a vibrator 401 arranged at the tail of the support frame platform 100, the vibrator 401 is connected with a vibrator connecting plate 402, the vibrator connecting plate 402 is connected with a feeding trough 102 positioned above the support frame platform 100, and a transverse damping device 403 is arranged between the feeding trough 102 and the support frame platform 100, so that the vibrator 401 can be prevented from transversely swinging during vibration. The motion characteristic of the vibration conveying mechanism is horizontal differential motion, and materials horizontally reciprocate on the motion characteristic. The feed trough 102 includes side plates, a bottom plate, coupling beams, and support beams. The vibrator 401 is a core component of the vibratory conveying mechanism, and the speed of the vibrator motor is controlled by a frequency converter installed in the MCC. The shaft hole of the vibration exciter box body is required to be formed at one time in a machining mode, and the coaxiality of the shaft hole is guaranteed; the tail vibrator adopts a special bearing for a vibrating machine, all the bearings are provided with bearing temperature measuring devices, real-time temperature is displayed on an operation table, the bearings are lubricated by a centralized lubricating system and lithium grease lubricating grease, and the service life of the tail vibrator can reach 10000 hours.
The vibrator connecting plate 402 is connected with the vibrator 401 through a hinged hole bolt, and the side plate, the bottom plate and the connecting beam are connected through ring groove rivets, so that deformation caused by impact of scrap steel can be prevented. The feeding part trough 102 and the side plates are connected through bolts, a top plate is clamped between the feeding part trough 102 and the side plates to buffer scrap steel impact, and the conveyer trough 102 is made of a steel plate Q355 and is 25mm thick. The hanger rod bolt is made of 42CrMo material and is subjected to thermal refining, the hanger rod nut is made of a locknut, and the service life of the hanger rod nut is not less than two years.
The heating section 3 is provided with a cover body 301 wrapping the vibration conveying mechanism 4, a combustion system is arranged on the cover body 301, and the combustion system heats corresponding scrap steel. The combustion system comprises burners 302 arranged on a cover body 301, the burners 302 are connected with an air supply pipeline 303, a main pipe of the air supply pipeline 303 is provided with a gate valve, a gas flowmeter, a pressure transmitter and a running-in pressure gauge which are connected with a control system, the main pipe is connected with branch pipes which are respectively connected with the burners 302, and the branch pipes are provided with an electric/pneumatic control valve and a manual butterfly valve which are connected with the control system.
Further, the hood body 301 is connected with a smoke exhaust system, the smoke exhaust system comprises a smoke pipeline 304 connected with the hood body 301, and the smoke pipeline 304 is connected with a dust removal system of a steel mill through a water-cooled heat exchanger 305. The cover body 301 is connected with a temperature measuring device, the temperature measuring device is controlled in an interlocking mode with a combustion system through a control system, and a quick-cutting valve and an alarm device which are connected with the control system are arranged on the air supply pipeline 303.
Specifically, the combustion system comprises a burner, an air supply pipeline, a smoke exhaust system, an ignition system, a nitrogen purging system and a safety protection system.
(1) Burner nozzle
The burner is a specially designed special burner, is not easy to backfire and loose fire, has stable and sufficient combustion and strong heating capacity, and the nozzle of the burner is made of stainless steel, so that the service life of the burner reaches more than one year.
(2) Air supply pipeline
The blast furnace gas main pipeline is provided with a blind plate valve, a gate valve, a gas flowmeter, a pressure transmitter, a running-in pressure gauge and the like. The pressure gauge displays the gas pressure, the pressure transmitter converts the pressure signal into an electric signal, and the PLC participates in interlocking control. The gas flow meter detects instantaneous and cumulative flow. The gas branch pipe is provided with a quick-cut valve, an electric/pneumatic regulating valve and a manual butterfly valve, and a gas inlet of each burner is provided with a regulating valve for independently regulating and controlling each burner. The air pipeline pipe is provided with an electric/pneumatic regulating valve and a manual butterfly valve, 3 combustion-supporting fans are arranged, and an explosion-proof motor/fan is adopted.
(3) Smoke exhaust system
The smoke exhaust system consists of a smoke pipeline, a heat exchanger and an adjusting valve, and smoke comes out from the smoke exhaust hole. The temperature of the flue gas after flowing through the heat exchanger is cooled to below 150 ℃, and the flue gas is merged into a dust removal system. Wherein the flue gas pipeline is internally provided with refractory materials. And carrying out water-cooling heat exchange on the flue gas, wherein the consumption of circulating water is 120 m/h. The heat exchange tube is made of heat-resistant stainless steel, can resist various corrosive media, is subjected to pressure test after welding, and has good sealing performance and zero leakage.
(4) Ignition system
The electronic ignition device has the characteristics of large output energy, reliable ignition, stable work, strong environmental adaptability and the like. It is suitable for various gas mediums and is widely applied to various industrial heating occasions.
(5) Temperature measuring device
The temperature measuring device comprises a thermocouple, a compensating wire and the like, can monitor the temperature of the flue gas in the heat-insulating cover in real time during baking, can also participate in control according to temperature signals, and can adjust the big fire or the small fire of the burner according to the baking condition.
(6) Nitrogen purging system
The nitrogen purging system is arranged, so that the gas pipeline can be purged before starting, and residual gas in the pipeline is discharged.
(7) Safety protection system
The equipment is provided with a plurality of safety interlocking programs.
When the gas pressure is too low, the quick-cutting valve is immediately closed, the gas pipeline is cut off, and the equipment gives an alarm or stops;
when the fan stops due to a fault, the quick-cutting valve is immediately closed, the gas pipeline is cut off, and the equipment stops;
when power is off, the quick-cutting valve is immediately closed, the gas pipeline is cut off, and the equipment is stopped;
when the gas leakage alarm detects that the surrounding environment reaches a certain concentration, an audible and visual alarm signal is sent out or a gas pipeline is cut off, and the equipment stops.
The feeding section 2 comprises a weighing mechanism 201 arranged at the end part of the cover body 301, the weighing mechanism 201 vertically corresponds to the running track of the torpedo tank 5, the steel grabbing machine 101, the vibration material conveying mechanism 4, the combustion system and the weighing mechanism 201 are all connected with a control system, and the control system is connected with a gate mechanism 202 which controls the bottom of the weighing mechanism 201 to open and close. The weighing mechanism 201 comprises a weighing sensor arranged at the bottom of the chute 102, the signal of the weighing sensor is interlocked with the vibration material conveying mechanism 4 through a control system, and when the weight reaches a preset value, the control system controls the vibration material conveying mechanism 4 to stop feeding.
The water cooling system comprises a cooling water main water inlet pipeline 501 and a cooling water main water return pipeline 502, the cooling water main water inlet pipeline 501 is connected with the cooling water main water return pipeline 502 through cooling water branches, a pressure transmitter and a thermocouple are arranged on the cooling water main water inlet pipeline 501, a flowmeter, a pressure transmitter and a thermocouple are arranged on the cooling water main water return pipeline 502, and a hose, a flow switch and a stop valve are arranged on each cooling water branch. The water-cooling trough 102 is made of Q355 wear-resistant steel plates, is annealed and destressed, has an inner wall thickness of 20mm and an outer wall thickness of 10mm, is arranged at the discharge end of the conveyor, and has the function of not deforming when high-temperature flue gas and furnace burden pass through.
Furthermore, the control system is connected with a control picture display unit, and the control picture display unit comprises a vibration conveying system picture display, a water cooling system picture display and a combustion system monitoring picture display.
The electric control system of the embodiment comprises the following components:
(1) frequency converter
The frequency converter is used for controlling the speed of a motor of the vibration conveying system.
(2) Desk cabinet setting
The device is provided with an electric appliance cabinet and an operation table, is arranged in an electric main control room and is mainly used for controlling a vibration conveying system, a combustion system, a weighing hopper and a lubricating system and monitoring and controlling the whole system. The table-board of the operation table is made of stainless steel.
(3) Local control box
The motor of the vibration conveying system, the combustion-supporting fan of the combustion system and the valve are provided with local control boxes for local control. The local control box is arranged near the controlled component to conveniently control the operation component, and the control box is explosion-proof and is provided with a button for safe operation and an emergency stop button.
(4) PLC system
The PLC system mainly completes all functions of data acquisition, signal output, program control, indication and the like of the scrap steel preheating equipment, and mainly comprises the following components:
-1 set of PLC
PLC: the CPU is Siemens S71500.
-1 suite of Human Machine Interface (HMI) equipped with 23 "LCD display, keyboard, mouse.
Human interface and process PC hardware: industrial control machine
I5-2400 CPU 3.1GHz, memory 8GB, hard disk (SSD) capacity 256GB, gigabit network card.
-design criteria: heavy-duty working system, dust-proof and dirt-proof.
Basic system software and application software
The operating systems of the HMI device and the PC are microsoft Windows systems.
The application software of the HMI device is developed using STEP7 and WINCC.
Each component of the scrap preheating system automation system and the process control system performs a specific task, which is classified according to function as follows:
PLC, console, local control box and HMI device.
The main operating platform is installed in the electric stove main control room, mainly used for:
A. starting and stopping the vibration conveying system and the combustion system;
B. manual and automatic adjustment of the vibratory conveying system;
C. manual setting of conveyor speed;
D. manual and automatic adjustment of the combustion system;
the electrical control system of the scrap steel preheating equipment is a complete industrial control system and comprises data acquisition, data processing, data display and automatic control. Necessary data of the system is received and transmitted under prescribed conditions.
Mainly embodied by the following control pictures
-pictures of a vibratory conveying system
The speed of the motor of the vibration conveying system is controlled by the system: the motor speed has a direct relation with the vibration frequency of the vibration conveying system, the motor controls the frequency converter through an analog output signal of the PLC, the motor speed (rpm) is obtained from an analog input signal of the PLC, and an instruction is divided into 20 steps at an analog output interval of 4-20mA (the motor speed is 5% in each step and is 0-100%)
Starting the vibration conveying system, setting an automatic/manual mode, and selecting the manual mode: the frequency of the tail vibrator can be conveniently adjusted by using a control button on the operating platform according to the actual production condition, so that the purpose of conveying capacity is achieved, and the operation can be increased/decreased according to the command of the operating platform: the% values (4 mA- > 0%, 20mA- > 100%) correspond to the speed of the vibratory delivery system being displayed on the console and the industrial control machine.
The speed of the vibratory conveying system can be displayed on the HMI interface, the percentage from the frequency range of 0-100% can be displayed, and the motor of the vibratory conveying system can be controlled by the frequency converter. And meanwhile, the running state of the lubricating system and automatic control and related detection data (including the smoke temperature and the smoke pressure) are displayed on the HMI interface.
-picture of water cooling system
And carrying out necessary detection and monitoring on the water cooling system.
-combustion system monitoring picture
The HMI interface displays the state of the whole combustion system, including gas pressure, gas flow and temperature detection. The system controls the combustion system and comprises operations of starting and stopping of a fan, control of a gas pipeline valve, automatic ignition, flame detection, linkage of gas leakage, linkage of pressure detection and the like. Both manual and automatic modes may be selected.
In order to achieve accurate and reliable control, the burner is provided with fuel gas and combustion-supporting air in proportion. The actuators are arranged on the combustion-supporting air duct and the gas pipeline to adjust the combustion control, so that the accurate control of the temperature is achieved, and the energy-saving effect is achieved. The whole baking process is displayed and controlled by an electric control system; can conveniently switch the big fire and the small fire according to the baking requirement.
Nothing in this specification is intended to be exhaustive of all conventional and well known techniques.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. Torpedo jar feed system with scrap steel preheats function is provided with reinforced section (1) cooperation and grabs steel machine (101), its characterized in that including arranging reinforced section (1) and throw material section (2) on support frame platform (100) in proper order: add material section (1) and throw and be provided with heating section (3) between material section (2), add material section (1) and heating section (3) and all be located the defeated material mechanism of vibration (4), heating section (3) are provided with cover body (301) of the defeated material mechanism of parcel vibration (4), are provided with combustion system on the cover body (301), throw material section (2) including setting up weighing mechanism (201) at cover body (301) tip, weighing mechanism (201) and torpedo jar (5) operation track correspond from top to bottom, grab steel machine (101), the defeated material mechanism of vibration (4), combustion system and weighing mechanism (201) and all link to each other with control system, and control system is connected with gate mechanism (202) that the bottom of control weighing mechanism (201) opened and shut.
2. The torpedo car feeding system with scrap steel preheating function as claimed in claim 1, wherein: the vibration material conveying mechanism (4) comprises a vibrator (401) arranged at the tail of a support frame platform (100), the vibrator (401) is connected with a vibrator connecting plate (402), the vibrator connecting plate (402) is connected with a feeding trough (102) located above the support frame platform (100), and a transverse damping device (403) is arranged between the feeding trough (102) and the support frame platform (100).
3. The torpedo car feeding system with scrap preheating function according to claim 1 or 2, characterized in that: the combustion system comprises burners (302) arranged on a cover body (301), the burners (302) are connected with an air supply pipeline (303), a gate valve, a gas flowmeter, a pressure transmitter and a running-in pressure gauge which are connected with a control system are arranged on a main pipe of the air supply pipeline (303), the main pipe is connected with branch pipes which are respectively connected with the burners (302), and an electric/pneumatic regulating valve and a manual butterfly valve which are connected with the control system are arranged on the branch pipes.
4. The torpedo car feeding system with scrap steel preheating function as in claim 3, wherein: the cover body (301) is connected with a smoke exhaust system, the smoke exhaust system comprises a smoke pipeline (304) connected with the cover body (301), and the smoke pipeline (304) is connected with a dust removal system of a steel mill through a water-cooling heat exchanger (305).
5. The torpedo car feeding system with scrap steel preheating function as in claim 4, wherein: the cover body (301) is connected with a temperature measuring device, the temperature measuring device is controlled in an interlocking mode through a control system and a combustion system, and a quick-cutting valve and an alarm device which are connected with the control system are arranged on the air supply pipeline (303).
6. The torpedo feed system with scrap preheating function according to any of claims 1-2, 4-5, characterized by: heating section (3) are provided with water cooling system, and water cooling system includes always intake pipe (501) and cooling water return water pipeline (502) with the cooling water, and the cooling water is always intake pipe (501) and is always linked to each other through the cooling water branch road between return water pipeline (502) with the cooling water, is equipped with pressure transmitter and thermocouple on the cooling water is always intake pipe (501), is equipped with the flowmeter on the cooling water is always returned water pipeline (502), pressure transmitter and thermocouple, be equipped with the hose on every cooling water branch road, flow switch, the stop valve.
7. The torpedo car feeding system with scrap steel preheating function as in claim 6, wherein: the weighing mechanism (201) comprises a weighing sensor arranged at the bottom of the chute (102), signals of the weighing sensor are interlocked with the vibration material conveying mechanism (4) through a control system, and when the weight reaches a preset value, the control system controls the vibration material conveying mechanism (4) to stop feeding.
8. The torpedo feed system with scrap preheating function according to any of claims 1-2, 4-5, 7, characterized by: the control system is connected with a control picture display unit, and the control picture display unit comprises a vibration conveying system picture display unit, a water cooling system picture display unit and a combustion system monitoring picture display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122560680.0U CN216205359U (en) | 2021-10-25 | 2021-10-25 | Torpedo tank feeding system with scrap steel preheating function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122560680.0U CN216205359U (en) | 2021-10-25 | 2021-10-25 | Torpedo tank feeding system with scrap steel preheating function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216205359U true CN216205359U (en) | 2022-04-05 |
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ID=80888145
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122560680.0U Active CN216205359U (en) | 2021-10-25 | 2021-10-25 | Torpedo tank feeding system with scrap steel preheating function |
Country Status (1)
| Country | Link |
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| CN (1) | CN216205359U (en) |
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2021
- 2021-10-25 CN CN202122560680.0U patent/CN216205359U/en active Active
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