CN-121131730-B - Cantilever type cutting casting head flue gas trapping method

CN121131730BCN 121131730 BCN121131730 BCN 121131730BCN-121131730-B

Abstract

The invention discloses a cantilever type cutting casting head flue gas trapping method, which is realized by a flue gas trapping device, when flue gas trapping is carried out, a dust removing mechanism is started at first to enable a system pipeline to be in a negative pressure suction state, then a rotary driving mechanism, a translational driving mechanism and a lifting driving mechanism are started in sequence according to specific stations of a middle and small piece casting cutting casting head, the position of an air suction cantilever pipe, the position of an air pipe connector and the height of a trapping cover are respectively adjusted, after the trapping cover reaches a target position, flue gas generated by cutting casting heads sequentially enters the trapping cover, a corrugated telescopic pipe, the air pipe connector, the air suction cantilever pipe and the dust removing mechanism due to the negative pressure suction effect, and after dust removal treatment, the flue gas is discharged after reaching standards. The invention has lower initial investment and lower operation energy consumption, reduces the ventilation quantity by 40-50% and the system operation energy consumption by 30-45% under the condition of the same trapping efficiency, and has better green low-carbon effect.

Inventors

SONG GAOJU
ZHANG YAHAO
LIU TONGZHOU
HAO LI
LU CHAOYANG
SUN YUMING

Assignees

机械工业第六设计研究院有限公司
山西中设华晋铸造有限公司

Dates

Publication Date: 20260512
Application Date: 20250926

Claims (6)

1. The flue gas trapping method for the cantilever type cutting casting head is realized through a flue gas trapping device and is characterized in that: The flue gas capturing device comprises a capturing cover, a flue gas negative pressure transmission mechanism and a dust removal mechanism, wherein the head part of the capturing cover is of a porous structure, a corrugated telescopic pipe is arranged at the tail part of the capturing cover, the flue gas negative pressure transmission mechanism comprises a rotary driving mechanism, the rotary driving mechanism is connected with an air draft cantilever pipe arranged above a cutting casting head area, an air pipe connector connected with a translation driving mechanism is arranged on the air draft cantilever pipe, the air pipe connector is provided with a first lower opening and a second lower opening, the first lower opening is opposite to a longitudinal vent at the top of the air draft cantilever pipe and is connected with the longitudinal vent at the top of the air draft cantilever pipe through a negative pressure sealing connection mechanism, the second lower opening is arranged at the outer side of the air draft cantilever pipe, the second lower opening is connected with the corrugated telescopic pipe, a lifting driving mechanism is further arranged on the air pipe connector, the lifting driving mechanism is connected with the capturing cover and is used for enabling the corrugated telescopic pipe to stretch or shrink, and one end of the air draft cantilever pipe, which is close to the edge of the cutting casting area, is provided with a hose connected with the dust removal mechanism; The translation driving mechanism comprises a support frame, the support frame is arranged on one side, far away from the second lower opening, of the air pipe connector, the top of the support frame is connected with the air pipe connector, a horizontal support is arranged at the bottom of the support frame, a translation motor is arranged on the horizontal support, an output shaft of the translation motor is in transmission connection with a driving wheel, and the top surface of the driving wheel is connected with the bottom surface of an air draft cantilever pipe; The translation driving mechanism further comprises a driven wheel arranged on the air pipe connector, wherein the top surface of the driven wheel is connected with the bottom surface of the air draft cantilever pipe and is correspondingly arranged with the driving wheel; The negative pressure sealing connection mechanism comprises a sealing belt arranged at the top of the air suction cantilever pipe and used for sealing the longitudinal vent, and further comprises a supporting roller shaft arranged in the air pipe connector, wherein the supporting roller shaft is perpendicular to the air suction cantilever pipe and arranged at four corners above the first lower opening, the supporting roller shaft comprises a pair of lower outer roller shafts and a pair of upper inner roller shafts, after the sealing belt enters the air pipe connector, the sealing belt is sequentially wound and connected along the first outer roller shaft, the first inner roller shaft, the second inner roller shaft and the second outer roller shaft, after the winding and connection are completed, the outer roller shafts are arranged between the sealing belt and the inner wall of the air pipe connector, and the inner roller shafts are arranged at the inner sides of the sealing belt; The lifting driving mechanism comprises a supporting platform which is arranged below the air draft cantilever pipe and connected with the air pipe connector, a lifting motor is arranged on the supporting platform, the output end of the lifting motor is provided with a winding shaft, the winding shaft is arranged in parallel with the air draft cantilever pipe, and two ends of the winding shaft are respectively provided with a lifting rope connected with the capturing cover; the flue gas trapping method comprises the steps of firstly starting a dust removing mechanism to enable a system pipeline to be in a negative pressure suction state, then sequentially starting a rotary driving mechanism, a translational driving mechanism and a lifting driving mechanism according to a specific station of a casting head for cutting small and medium castings, respectively adjusting the position of an air suction cantilever pipe, the position of an air pipe connector and the height of a trapping cover, after the trapping cover reaches a target position, enabling flue gas generated by the cutting casting head to sequentially enter the trapping cover, a corrugated telescopic pipe, the air pipe connector, the air suction cantilever pipe and the dust removing mechanism due to the negative pressure suction effect, and carrying out dust removal treatment and then discharging the flue gas reaching standards.
2. The method for trapping flue gas of a cantilever type cutting casting head according to claim 1, wherein the trapping cover is of a conical structure, the head of the trapping cover is provided with a cover mouth plate of a porous structure, round holes or elliptical holes which are arranged in a double-ring shape are formed in the outer edge of the cover mouth plate, and the porosity of the cover mouth plate is 0.2-0.4; the trapping cover is conical, and the cover opening is circular; The cover opening is of a porous structure formed by round holes or elliptical holes, the round holes or the elliptical holes are arranged in a double-ring shape along the outer edge, and the porosity of the cover opening is 0.2-0.4.
3. The method for trapping flue gas of a cantilever type cutting casting head according to claim 1, wherein the rotary driving mechanism is arranged outside a cutting casting head area and comprises a rotary motor, an output shaft of the rotary motor is connected with a vertically arranged rotary shaft through a belt transmission mechanism, and the rotary shaft is fixedly connected with the end part of an exhaust cantilever pipe.
4. The method for trapping flue gas of a cantilever type cutting casting head according to claim 1, wherein the rotation radius of the air draft cantilever pipe is equal to the width of a cutting casting head area, and an inclined-pull steel wire rope connected with a plant upright post is arranged at one end of the air draft cantilever pipe away from the rotation driving mechanism.
5. The method of claim 1, wherein the duct connector includes an L-shaped sealed cavity structure having a first lower opening and a second lower opening, the first lower opening being formed in a higher bottom surface and the second lower opening being formed in a lower bottom surface.
6. The method for trapping flue gas of a cantilever type cutting casting head according to claim 1, wherein the dust removing mechanism is arranged outside a cutting casting head area and comprises a dust remover connected with the hose, and a smoke exhaust fan is arranged at the outlet end of the dust remover.

Description

Cantilever type cutting casting head flue gas trapping method Technical Field The invention relates to the technical field of casting production, in particular to a flue gas trapping method for a cantilever type cutting casting head. Background In casting production, cutting the dead head is a key process, and at present, excessive dead heads are softened and fused by gas flames. A large amount of smoke can be generated in the flame cutting process, if the trapping and purifying treatment is not performed in time, the workshop environment and the atmospheric environment can be polluted, and the harm to the health of workers is caused. Therefore, the flue gas trapping of the cutting casting head is an important link for realizing clean production in the casting industry. Under normal conditions, the cutting casting head is operated discontinuously, stations are not fixed, and for middle and small castings, if a smoke trapping and purifying device provided by ZL202210299185.5 is adopted, the defects of huge volume, inconvenient movement, weak smoke trapping pertinence and the like exist. The flue gas diffusion range is larger when the casting head is cut by the middle and small castings under the influence of the cross-hall wind in a workshop, the flue gas diffusion range is designed according to the principle of full-section coverage of the flue gas plume, the diameter of the exhaust hood is at least 1-1.5 m, and in order to achieve a good trapping effect, the opening of the exhaust hood is required to keep a certain wind speed, so that the ventilation volume of the system is increased, the initial investment and the operation energy consumption of equipment are higher, and the requirements of green low-carbon development are not met. Disclosure of Invention In order to solve the problems, the invention provides a cantilever type cutting casting head smoke trapping method, which concretely adopts the following technical scheme: the flue gas trapping method of the cantilever type cutting casting head is realized by a flue gas trapping device, wherein, The flue gas capturing device comprises a capturing cover, a flue gas negative pressure transmission mechanism and a dust removal mechanism, wherein the head part of the capturing cover is of a porous structure, a corrugated telescopic pipe is arranged at the tail part of the capturing cover, the flue gas negative pressure transmission mechanism comprises a rotary driving mechanism, the rotary driving mechanism is connected with an air draft cantilever pipe arranged above a cutting casting head area, an air pipe connector connected with a translation driving mechanism is arranged on the air draft cantilever pipe, the air pipe connector is provided with a first lower opening and a second lower opening, the first lower opening is opposite to a longitudinal vent at the top of the air draft cantilever pipe and is connected with the longitudinal vent at the top of the air draft cantilever pipe through a negative pressure sealing connection mechanism, the second lower opening is arranged at the outer side of the air draft cantilever pipe, the second lower opening is connected with the corrugated telescopic pipe, a lifting driving mechanism is further arranged on the air pipe connector, the lifting driving mechanism is connected with the capturing cover and is used for enabling the corrugated telescopic pipe to stretch or shrink, and one end of the air draft cantilever pipe, which is close to the edge of the cutting casting area, is provided with a hose connected with the dust removal mechanism; the flue gas trapping method comprises the steps of firstly starting a dust removing mechanism to enable a system pipeline to be in a negative pressure suction state, then sequentially starting a rotary driving mechanism, a translational driving mechanism and a lifting driving mechanism according to a specific station of a casting head for cutting small and medium castings, respectively adjusting the position of an air suction cantilever pipe, the position of an air pipe connector and the height of a trapping cover, after the trapping cover reaches a target position, enabling flue gas generated by the cutting casting head to sequentially enter the trapping cover, a corrugated telescopic pipe, the air pipe connector, the air suction cantilever pipe and the dust removing mechanism due to the negative pressure suction effect, and carrying out dust removal treatment and then discharging the flue gas reaching standards. The collecting cover is of a conical structure, the head of the collecting cover is provided with a cover mouth plate of a porous structure, round holes or elliptical holes which are arranged in a double-ring mode are formed in the outer edge of the cover mouth plate, and the porosity of the cover mouth plate is 0.2-0.4. The rotary driving mechanism is arranged outside the cutting casting head area and comprises a rotary motor, an output shaft of the rotary motor is