All-fiber trolley type annealing furnace (energy-saving type) technical solution
First, the use of all-fiber trolley type annealing furnace (energy-saving type):
All-fiber trolley type annealing furnace (energy-saving type) is mainly used for heat treatment of large carbon steel, large welded parts and alloy steel parts for heating, annealing, normalizing, quenching and tempering: surface quenching, tempering welding and stress relief annealing.
Second, the main design technical parameters of the all-fiber trolley type annealing furnace (energy-saving type):
1 Rated power: 1600KW
2 rated voltage: 380V 3 phase 50Hz
3 rated temperature: 700 ° C
4 number of temperature control zones: 12 zones
5 Furnace temperature uniformity: ±20 °C
6 Temperature control mode: PID zero-crossing triggers thyristor, programmable intelligent instrument temperature control, Shanghai Dahua Zhongchang multi-point recorder recording and over-temperature sound and light alarm
7 Working size: 19000×3500×3500mm (length×width×height)
8 empty furnace heating time: ≤1.5h
9 Loading capacity: 100t
10 furnace door lift motor: 7.5KW
11 furnace door lifting speed: ~6m/min
12 car drive motor power: 7.5KW × 2
13 trolley moving speed: 6~8m/min
14 furnace door and furnace mouth sealing form: electric push rod compression sealing device (fiber soft seal)
15 furnace external wall temperature rise: ≤ 25 ° C
Third, the all-fiber trolley type annealing furnace (energy-saving type) structure:
All-fiber trolley type annealing furnace (energy-saving type) mainly consists of heating furnace body, trolley and trolley traction mechanism, furnace door and furnace door lifting and pressing device, heating element and fixing device, walking platform and escalator mechanism, and electric temperature Control system and other components.
3.1 Heating furnace body
3.1.1 The frame of the furnace body is made of channel steel and angle steel. The side plates of the shell are welded by Q235 steel plate. The structure is firm and reliable, the overall strength is good, it is not easy to be deformed, and the appearance is smooth and smooth.
3.1.2 The lining is a full-fiber structure. The total thickness of the lining fiber is 300mm. It adopts the standard type produced by Shandong Luyang Co., Ltd. by vacuum crepe method. The compressed bulk density is ≥220Kg/m3; using scientific and reasonable mounting method, this There are few thermal bridge short-circuit phenomena in the structure, and it is combined in two ways. It has good air tightness, firm and reliable, convenient maintenance, long service life, good energy saving effect, light weight of the furnace body and temperature rise of the furnace shell. Small and other advantages.
3.1.3 The sealing of the furnace body and the trolley is sealed by a sealing knife. The two sides of the trolley are welded with double-layer stainless steel sealing knives on both sides and the tail. After the trolley enters the furnace, the sealing knives are inserted into the fiber lining to seal. The whole sealing is soft and sealed. The effect is good and the operation is simple.
3.1.4 All the welded parts of the furnace body shall be polished, and then scraped with iron putty and sprayed with hot anti-rust paint, and then painted according to the color standard provided by the user.
3.2 Trolley and trolley traction mechanism
3.2.1 The trolley consists of a frame, a trolley lining, and a trolley traction mechanism.
3.2.2 The frame of the trolley is made of channel steel and I-beam, and the side plate and the bottom plate are welded by Q235 steel plate. The structure of the trolley is firm and reliable, not easy to be deformed and warped, and the overall strength is good.
3.2.3 The insulation layer of the substrate of the trolley furnace is made of two layers of diatomite brick and light straight brick. The middle layer is made of straight brick, the refractory layer is made of heavy brick, and the refractory layer is built. The high temperature binder is added to the mud to improve the structural strength. The trolley is surrounded by special-shaped bricks, so that the furnace gas does not directly contact the side panels of the trolley. The refractory layer of the trolley is placed in a heating groove at the heating element, and is used for resting the floor of the furnace.
3.2.4 The top of the trolley lining is covered with a heat-resistant steel furnace bottom plate made of ZG3Cr18Mn12Si2N for resting the workpiece. It adopts a new type of buckle to prevent the workpiece from falling onto the heating element and forming a short circuit. The furnace floor is made in blocks to reduce deformation and cracking at high temperatures.
3.2.5 The trolley traveling mechanism adopts the wheel type self-propelling method, and 5 rows (10 in total) of the walking wheels are installed under the trolley body, and the transmission is directly driven by the gear of the deceleration machine.
3.2.6 There is a double safety limit switch at the limit of both ends of the trolley stroke to avoid over-stroke walking and damage the furnace body and accidents.
3.2.7 The power supply of the heating element on the trolley is completed by the inserting knife at the tail of the trolley and the socket at the tail of the furnace. The contact is good, there is no spark and overheating.
3.3 Furnace door and furnace door lifting and pressing device
3.3.1 The furnace door frame is made of channel steel. The side plate and the bottom plate are welded by Q235 steel plate. The structure is firm and reliable, it is not easy to be deformed and warped, and the overall strength is good.
3.3.2 The furnace door lining is also a full fiber structure, and the fiber is compressed into a concave frame type, so that the electric heating element does not expose the inner plane, and the electric heating element and the fiber are not damaged by collision during the lifting process of the furnace door.
3.3.3 The lifting and lowering of the furnace door is driven by a 5t electric hoist, which is equipped with a brake to make the furnace door rise and fall smoothly.
3.3.4 The sealing of the furnace door and the furnace body is sealed by the electric push rod pressing mechanism, which is easy to operate and has a soft fiber seal and a good sealing effect.
3.4 Heating elements and fixtures
3.4.1 The heating elements are arranged in 12 zones. The power of each zone is reasonably distributed according to the uniformity of the furnace temperature. The heating elements are arranged on the left and right side walls, the furnace door, the back wall and the trolley. The heating elements are made of 0Cr21Al5 alloy resistance tape. Wrapped into a corrugated shape.
3.4.2 The left and right side walls, the rear wall and the furnace door are respectively suspended on the lining fiber by a new type of porcelain screw. The fiber mounting form of the heating element on the furnace door is a concave frame structure to avoid the furnace door lifting and furnace. The mouth collides; the heating elements on the trolley are laid flat in the grooves of the refractory bricks, fixed by the shaped hooks, and the surface load is smaller than the heating elements of other parts. The suspension method using the new type of porcelain screw does not cause a short circuit, and it is convenient to replace and repair.
3.5 The platform and the escalator are assembled to facilitate the installation and overhaul of the pulley block and other parts of the furnace roof in the furnace door transmission mechanism. The maintenance platform and the escalator are arranged on the rear side of the furnace and the beam beam of the furnace roof door.
The walking platform and the escalator are welded from profiled steel and patterned steel plates, and are equipped with safety guardrails and handrails.
3.6 electric temperature control system
3.6.1 All-fiber trolley-type annealing furnace (energy-saving type) temperature control system adopts PID zero-crossing to trigger thyristor, programmable intelligent instrument is divided into 12 zones for temperature control, with high temperature control precision, stable furnace temperature and small temperature difference fluctuation. And other advantages; in addition, the Shanghai Dahua Zhongchang multi-point recorder is used to record temperature and over-temperature sound and light alarms.
3.6.2 There are voltage and current indication tables on the electric control cabinet, and each phase of each zone is designed with heating indicator light, which is convenient for the operator to observe whether the heating work in each zone is normal. When the heating is slow, it is helpful for troubleshooting and solve.
3.6.3 In addition to the heating circuit to provide over-temperature and phase-breaking over-current short-circuit protection, it has a reliable action chain protection for the electric lift of the furnace door and the entry and exit of the trolley. The charging process has the following interlock protection: the trolley does not enter the furnace, the furnace door cannot be lowered, and the heating element power can be turned on after the furnace door is closed. The discharging process has the following interlock protection: the furnace door is opened, and the heating element power supply is cut off. Only when the furnace door is opened to the highest position, the trolley can be opened.
First, the use of all-fiber trolley type annealing furnace (energy-saving type):
All-fiber trolley type annealing furnace (energy-saving type) is mainly used for heat treatment of large carbon steel, large welded parts and alloy steel parts for heating, annealing, normalizing, quenching and tempering: surface quenching, tempering welding and stress relief annealing.
Second, the main design technical parameters of the all-fiber trolley type annealing furnace (energy-saving type):
1 Rated power: 1600KW
2 rated voltage: 380V 3 phase 50Hz
3 rated temperature: 700 ° C
4 number of temperature control zones: 12 zones
5 Furnace temperature uniformity: ±20 °C
6 Temperature control mode: PID zero-crossing triggers thyristor, programmable intelligent instrument temperature control, Shanghai Dahua Zhongchang multi-point recorder recording and over-temperature sound and light alarm
7 Working size: 19000×3500×3500mm (length×width×height)
8 empty furnace heating time: ≤1.5h
9 Loading capacity: 100t
10 furnace door lift motor: 7.5KW
11 furnace door lifting speed: ~6m/min
12 car drive motor power: 7.5KW × 2
13 trolley moving speed: 6~8m/min
14 furnace door and furnace mouth sealing form: electric push rod compression sealing device (fiber soft seal)
15 furnace external wall temperature rise: ≤ 25 ° C
Third, the all-fiber trolley type annealing furnace (energy-saving type) structure:
All-fiber trolley type annealing furnace (energy-saving type) mainly consists of heating furnace body, trolley and trolley traction mechanism, furnace door and furnace door lifting and pressing device, heating element and fixing device, walking platform and escalator mechanism, and electric temperature Control system and other components.
3.1 Heating furnace body
3.1.1 The frame of the furnace body is made of channel steel and angle steel. The side plates of the shell are welded by Q235 steel plate. The structure is firm and reliable, the overall strength is good, it is not easy to be deformed, and the appearance is smooth and smooth.
3.1.2 The lining is a full-fiber structure. The total thickness of the lining fiber is 300mm. It adopts the standard type produced by Shandong Luyang Co., Ltd. by vacuum crepe method. The compressed bulk density is ≥220Kg/m3; using scientific and reasonable mounting method, this There are few thermal bridge short-circuit phenomena in the structure, and it is combined in two ways. It has good air tightness, firm and reliable, convenient maintenance, long service life, good energy saving effect, light weight of the furnace body and temperature rise of the furnace shell. Small and other advantages.
3.1.3 The sealing of the furnace body and the trolley is sealed by a sealing knife. The two sides of the trolley are welded with double-layer stainless steel sealing knives on both sides and the tail. After the trolley enters the furnace, the sealing knives are inserted into the fiber lining to seal. The whole sealing is soft and sealed. The effect is good and the operation is simple.
3.1.4 All the welded parts of the furnace body shall be polished, and then scraped with iron putty and sprayed with hot anti-rust paint, and then painted according to the color standard provided by the user.
3.2 Trolley and trolley traction mechanism
3.2.1 The trolley consists of a frame, a trolley lining, and a trolley traction mechanism.
3.2.2 The frame of the trolley is made of channel steel and I-beam, and the side plate and the bottom plate are welded by Q235 steel plate. The structure of the trolley is firm and reliable, not easy to be deformed and warped, and the overall strength is good.
3.2.3 The insulation layer of the substrate of the trolley furnace is made of two layers of diatomite brick and light straight brick. The middle layer is made of straight brick, the refractory layer is made of heavy brick, and the refractory layer is built. The high temperature binder is added to the mud to improve the structural strength. The trolley is surrounded by special-shaped bricks, so that the furnace gas does not directly contact the side panels of the trolley. The refractory layer of the trolley is placed in a heating groove at the heating element, and is used for resting the floor of the furnace.
3.2.4 The top of the trolley lining is covered with a heat-resistant steel furnace bottom plate made of ZG3Cr18Mn12Si2N for resting the workpiece. It adopts a new type of buckle to prevent the workpiece from falling onto the heating element and forming a short circuit. The furnace floor is made in blocks to reduce deformation and cracking at high temperatures.
3.2.5 The trolley traveling mechanism adopts the wheel type self-propelling method, and 5 rows (10 in total) of the walking wheels are installed under the trolley body, and the transmission is directly driven by the gear of the deceleration machine.
3.2.6 There is a double safety limit switch at the limit of both ends of the trolley stroke to avoid over-stroke walking and damage the furnace body and accidents.
3.2.7 The power supply of the heating element on the trolley is completed by the inserting knife at the tail of the trolley and the socket at the tail of the furnace. The contact is good, there is no spark and overheating.
3.3 Furnace door and furnace door lifting and pressing device
3.3.1 The furnace door frame is made of channel steel. The side plate and the bottom plate are welded by Q235 steel plate. The structure is firm and reliable, it is not easy to be deformed and warped, and the overall strength is good.
3.3.2 The furnace door lining is also a full fiber structure, and the fiber is compressed into a concave frame type, so that the electric heating element does not expose the inner plane, and the electric heating element and the fiber are not damaged by collision during the lifting process of the furnace door.
3.3.3 The lifting and lowering of the furnace door is driven by a 5t electric hoist, which is equipped with a brake to make the furnace door rise and fall smoothly.
3.3.4 The sealing of the furnace door and the furnace body is sealed by the electric push rod pressing mechanism, which is easy to operate and has a soft fiber seal and a good sealing effect.
3.4 Heating elements and fixtures
3.4.1 The heating elements are arranged in 12 zones. The power of each zone is reasonably distributed according to the uniformity of the furnace temperature. The heating elements are arranged on the left and right side walls, the furnace door, the back wall and the trolley. The heating elements are made of 0Cr21Al5 alloy resistance tape. Wrapped into a corrugated shape.
3.4.2 The left and right side walls, the rear wall and the furnace door are respectively suspended on the lining fiber by a new type of porcelain screw. The fiber mounting form of the heating element on the furnace door is a concave frame structure to avoid the furnace door lifting and furnace. The mouth collides; the heating elements on the trolley are laid flat in the grooves of the refractory bricks, fixed by the shaped hooks, and the surface load is smaller than the heating elements of other parts. The suspension method using the new type of porcelain screw does not cause a short circuit, and it is convenient to replace and repair.
3.5 The platform and the escalator are assembled to facilitate the installation and overhaul of the pulley block and other parts of the furnace roof in the furnace door transmission mechanism. The maintenance platform and the escalator are arranged on the rear side of the furnace and the beam beam of the furnace roof door.
The walking platform and the escalator are welded from profiled steel and patterned steel plates, and are equipped with safety guardrails and handrails.
3.6 electric temperature control system
3.6.1 All-fiber trolley-type annealing furnace (energy-saving type) temperature control system adopts PID zero-crossing to trigger thyristor, programmable intelligent instrument is divided into 12 zones for temperature control, with high temperature control precision, stable furnace temperature and small temperature difference fluctuation. And other advantages; in addition, the Shanghai Dahua Zhongchang multi-point recorder is used to record temperature and over-temperature sound and light alarms.
3.6.2 There are voltage and current indication tables on the electric control cabinet, and each phase of each zone is designed with heating indicator light, which is convenient for the operator to observe whether the heating work in each zone is normal. When the heating is slow, it is helpful for troubleshooting and solve.
3.6.3 In addition to the heating circuit to provide over-temperature and phase-breaking over-current short-circuit protection, it has a reliable action chain protection for the electric lift of the furnace door and the entry and exit of the trolley. The charging process has the following interlock protection: the trolley does not enter the furnace, the furnace door cannot be lowered, and the heating element power can be turned on after the furnace door is closed. The discharging process has the following interlock protection: the furnace door is opened, and the heating element power supply is cut off. Only when the furnace door is opened to the highest position, the trolley can be opened.
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