Cantilevered cutting of sprue fume capturing device

Abstract

The utility model discloses a cantilever type cutting pouring riser flue gas trapping device, including trapping cover, flue gas negative pressure transmission mechanism and dust removal mechanism, trapping cover links with bellows, and flue gas negative pressure transmission mechanism includes the air draft cantilever pipe linked with rotary drive mechanism, is provided with the air pipe connector linked with the translation drive mechanism on the air draft cantilever pipe, and the air pipe connector has first lower opening and second lower opening, and the first lower opening is opposite with the longitudinal ventilation opening of the air draft cantilever pipe top and is linked through the negative pressure sealing connection mechanism, and the second lower opening links with bellows, and the air pipe connector still is provided with the lifting drive mechanism linked with trapping cover on, for making bellows lengthening or contraction, and the air draft cantilever pipe still is provided with the hose linked with dust removal mechanism. The utility model discloses the initial investment is lower, and the operation energy consumption is lower, and has better green low carbon effect.

Description

Technical Field

[0001] This utility model relates to the field of casting production technology, and in particular to a cantilevered cutting gate flue gas collection device. Background Technology

[0002] In casting production, cutting risers and gating gates is a critical process, currently often achieved by softening and melting off excess risers and gating gates using gas flames. This flame cutting process generates a large amount of fumes, which, if not captured and purified in a timely manner, will pollute the workshop and atmospheric environment, posing a threat to the health of workers. Therefore, fumes capture during riser and gating gate cutting is a crucial step in achieving clean production in the casting industry. Typically, riser and gating gate cutting is an intermittent operation with no fixed workstation. For small and medium-sized castings, the fume capture and purification device provided by ZL202210299185.5 suffers from drawbacks such as its large size, inconvenient mobility, and lack of targeted fume capture. Due to the cross ventilation in the workshop, the fumes from the cutting of the gating and riser of small and medium-sized castings have a large diffusion range. According to the principle of full coverage of the plume, the diameter of the exhaust hood needs to be at least 1 to 1.5 meters. In addition, in order to achieve a good capture effect, the exhaust hood opening also needs to maintain a certain wind speed, which increases the system ventilation volume, resulting in higher initial investment and operating energy consumption, which does not meet the requirements of green and low-carbon development. Summary of the Invention

[0003] To solve the above problems, this utility model provides a cantilevered cutting riser flue gas collection device, which can be implemented using the following technical solution: The cantilevered flue gas collection device for cutting risers and gating gates of this utility model includes a collection hood, a flue gas negative pressure transmission mechanism, and a dust removal mechanism. The head of the collection hood has a porous structure, and the tail of the collection hood is provided with a corrugated telescopic tube. The flue gas negative pressure transmission mechanism includes a rotary drive mechanism, which is connected to an exhaust cantilever pipe located above the cutting riser and gating gate area. The exhaust cantilever pipe is provided with a duct connector connected to a translation drive mechanism. The duct connector has a first lower opening and a second lower opening. The first lower opening is opposite to the longitudinal ventilation port at the top of the exhaust cantilever pipe and is connected to it through a negative pressure sealing connection mechanism. The second lower opening is located on the outside of the exhaust cantilever pipe and is connected to the corrugated telescopic tube. The duct connector is also provided with a lifting drive mechanism, which is connected to the collection hood and is used to extend or retract the corrugated telescopic tube. A flexible hose connected to the dust removal mechanism is provided at one end of the exhaust cantilever pipe near the edge of the cutting riser and gating gate area.

[0004] The trapping hood has a conical structure. The head of the trapping hood is provided with a perforated hood plate. The outer edge of the hood plate is provided with round or elliptical holes arranged in a double ring. The porosity of the hood plate is 0.2 to 0.4.

[0005] The rotary drive mechanism is located outside the cutting riser area and includes a rotary motor. The output shaft of the rotary motor is connected to a vertically arranged rotary shaft through a belt drive mechanism. The rotary shaft is fixedly connected to the end of the exhaust cantilever pipe.

[0006] The rotation radius of the exhaust cantilever pipe is equal to the width of the cutting riser area, and the end of the exhaust cantilever pipe away from the rotation drive mechanism is provided with a diagonal steel wire rope connected to the factory column.

[0007] The duct connector includes an L-shaped sealed cavity structure with a first lower opening and a second lower opening, wherein the first lower opening is located on the higher bottom surface and the second lower opening is located on the lower bottom surface.

[0008] The translation drive mechanism includes a support frame, which is located on the side of the duct connector away from the second lower opening. The top of the support frame is connected to the duct connector, and a horizontal support is provided at the bottom of the support frame. A translation motor is provided on the horizontal support, and the output shaft of the translation motor is connected to the drive wheel. The top surface of the drive wheel is connected to the bottom surface of the exhaust cantilever pipe.

[0009] The translation drive mechanism also includes a driven wheel mounted on the duct connector. The top surface of the driven wheel is in contact with the bottom surface of the exhaust cantilever pipe and is correspondingly mounted to the driving wheel.

[0010] The negative pressure sealing connection mechanism includes a sealing belt disposed at the top of the exhaust cantilever pipe for sealing the longitudinal vent, and a support roller shaft disposed inside the duct connector. The support roller shaft is perpendicular to the exhaust cantilever pipe and disposed at the four corners above the first lower opening. It includes a pair of lower outer roller shafts and a pair of upper inner roller shafts. The outer roller shafts are disposed between the sealing belt and the inner wall of the duct connector, and the inner roller shafts are disposed inside the sealing belt.

[0011] The lifting drive mechanism includes a support platform located below the exhaust cantilever pipe and connected to the duct connector. A lifting motor is installed on the support platform, and a winding shaft is installed at the output end of the lifting motor. The winding shaft is arranged parallel to the exhaust cantilever pipe, and a lifting rope connected to the collection hood is installed at each end of the winding shaft.

[0012] The dust removal mechanism is located outside the cutting and pouring area, and includes a dust collector connected to the hose. The outlet end of the dust collector is equipped with a smoke exhaust fan.

[0013] This utility model provides a cantilevered flue gas collection device for cutting risers and gating points. It features a clever structure, flexible movement, wide coverage, and a high degree of automation. The collection hood can move horizontally along the exhaust cantilever pipe and rotate with the pipe to reach the target position, depending on the specific workstation for cutting risers and gating points on small and medium-sized castings. The vertical height is then controlled by a lifting drive mechanism for targeted flue gas collection. Because the rotation drive mechanism of the exhaust cantilever pipe is located on one side of the workshop and is lower than the overhead crane, the collection hood can move freely in the risingr and gating point area without affecting the crane's movement. This makes it ideal for workstations with non-fixed workstations and intermittent operations. In the case of small-part cutting and gating riser operation, the collection hood is connected to the exhaust cantilever pipe via a corrugated expansion tube and a duct connector with a negative pressure sealing connection mechanism. The corners are all rigid connection structures that are not easily deformed. Therefore, even if the corrugated expansion tube expands or contracts, it will not cause a significant change in the duct resistance, and the system ventilation volume remains basically constant. The collection hood is equipped with a perforated hood plate with a porosity of 0.2 to 0.4, arranged in a double ring along the outer edge. This can maintain a high collection efficiency at a low ventilation volume, reducing the pollution of the workshop environment and atmospheric environment caused by the escape of flue gas from the cutting and gating riser, as well as the harm to the health of employees.

[0014] Compared with existing flue gas capture devices, this invention has a lower initial investment and lower operating energy consumption. Through engineering application and calculation, under the same capture efficiency, the ventilation volume of this invention can be reduced by 40% to 50%, and the system operating energy consumption can be reduced by 30% to 45%, which has a better green and low-carbon effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 yes Figure 1 Top view.

[0017] Figure 3 This is a structural schematic diagram of the duct connector in this utility model.

[0018] Figure 4 This is a schematic diagram of the connection structure between the duct connector and the exhaust cantilever pipe in this utility model.

[0019] Figure 5 yes Figure 4 AA cross-section view.

[0020] Figure 6 yes Figure 5 BB cross-section.

[0021] Figure 7 This is a schematic diagram of the arrangement of the air-catching vents on the trapping hood in this utility model. Detailed Implementation

[0022] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments.

[0023] The cantilevered cutting riser flue gas collection device of this utility model is provided in one or more sets depending on the size of the cutting riser area. Each set consists of a collection hood, a flue gas negative pressure transmission mechanism and a dust removal mechanism.

[0024] like Figure 1-7 As shown, the head of the trap hood 1 has a porous structure and is equipped with a flame arrester, while the tail of the trap hood is equipped with a corrugated telescopic tube 2. Specifically, the trap hood 1 has a conical structure, and the head of the trap hood 1 is equipped with a trap opening plate 11 with a porous structure. The outer edge of the trap opening plate 11 is provided with round or elliptical holes arranged in a double ring shape, and the porosity of the trap opening plate is 0.2 to 0.4.

[0025] The method for calculating the ventilation volume of the above-mentioned wind trap hood 1 when collecting smoke is as follows: (1) (1) Where: L—ventilation volume, m³ / h; —Opening velocity, m / s; S—Opening area, square meters.

[0026] It can be seen that the collection efficiency of the exhaust hood is closely related to the wind speed at the opening. When the opening wind speed is the same, by adopting the hood plate 11 form described in this invention and maintaining the above-mentioned opening ratio, a high flue gas collection efficiency can be maintained at a lower ventilation volume, thereby reducing the pollution of the workshop environment and atmospheric environment caused by flue gas escaping from the cutting and casting riser, as well as the harm to the health of employees.

[0027] The flue gas negative pressure transmission mechanism includes a rotary drive mechanism 3, which is connected to an exhaust cantilever pipe 4 located above the cutting riser area. The exhaust cantilever pipe 4 is provided with a duct connector 6 connected to a translation drive mechanism 5. The duct connector 6 has a first lower opening 61 and a second lower opening 62. The first lower opening 61 is opposite to the longitudinal ventilation port 41 at the top of the exhaust cantilever pipe 4 and is connected to the negative pressure sealing connection mechanism 7. The second lower opening 62 is located on the outside of the exhaust cantilever pipe 4 and is connected to the corrugated telescopic pipe 2. The duct connector 6 is also provided with a lifting drive mechanism 8, which is connected to the collection hood 1 and is used to extend or retract the corrugated telescopic pipe 2. A flexible hose 10 connected to a dust removal mechanism 9 is provided at one end of the exhaust cantilever pipe 4 near the edge of the cutting riser area.

[0028] The aforementioned rotary drive mechanism 3 is located outside the cutting riser and gating area and includes a rotary motor. The output shaft of the rotary motor is connected to a vertically arranged rotary shaft 31 via a belt drive mechanism. The rotary shaft 31 is fixedly connected to the end of the exhaust cantilever pipe 4. When the rotary motor starts, the exhaust cantilever pipe 4 can rotate around the rotary shaft 31. The length of the exhaust cantilever pipe 4 can be determined according to the overall design scheme, using one or more pipes, arranged on the same side, opposite side, or adjacent side of the cutting riser and gating area, with the standard being to cover the entire cutting riser and gating area. In this embodiment, multiple exhaust cantilever pipes 4 are arranged at intervals on the same side of the cutting riser and gating area, and the rotation radius (i.e., length) of each exhaust cantilever pipe 4 is equal to the width of the cutting riser and gating area. To keep the exhaust cantilever pipe 4 horizontal, a diagonal steel wire rope 42 is provided at the end away from the rotary drive mechanism, and the other end of the diagonal steel wire rope 42 is usually fixed to the factory building column.

[0029] The aforementioned duct connector 6 includes an L-shaped sealed cavity structure with a first lower opening 61 and a second lower opening 62. The first lower opening 61 is located on the higher bottom surface, which is situated on the top surface of the exhaust cantilever pipe 4; the second lower opening 62 is located on the lower bottom surface, which is situated on the outer side of the exhaust cantilever pipe 4. The first lower opening 61 is used to connect to the exhaust cantilever pipe 4, and the second lower opening 62 is used to connect to the collection hood 1. Through the duct connector 6, the flue gas drawn in by the collection hood 1 can enter the exhaust cantilever pipe 4, and then enter the dust removal mechanism 9 through the hose 10.

[0030] The aforementioned translation drive mechanism 5 includes a support frame 51, which is located on the side of the duct connector 6 away from the second lower opening 62. The top of the support frame 51 is welded to the side wall of the duct connector 6. A horizontal support 52 is provided at the bottom of the support frame 51, and a translation motor 53 is mounted on the horizontal support 52. The output shaft of the translation motor 53 is connected to a drive wheel 54, the top surface of which is in contact with the bottom surface of the exhaust cantilever pipe 4. Further, the translation drive mechanism 5 also includes a driven wheel 55 mounted on the duct connector 6. The top surface of the driven wheel 55 is also in contact with the bottom surface of the exhaust cantilever pipe 4 and is correspondingly positioned to the drive wheel 54. Preferably, the bottom surface of the exhaust cantilever pipe 4 has linear guide grooves corresponding to the drive wheel 54 and the driven wheel 55, respectively. When the translation motor 53 is started, the drive wheel 54 rotates, causing the duct connector 6 to move along the exhaust cantilever pipe 4. Besides the above-described form, the translation drive mechanism 5 can also be configured with other structures depending on the actual situation. For example, the drive wheel 55 can be set on the side wall of the duct connector 6, or instead of using the translation motor 53 as the power source, a pair of traction mechanisms can be used. The traction mechanisms are set at both ends of the exhaust cantilever pipe 4, and the traction ropes of the two traction mechanisms are connected to the duct connector 6 respectively. When in use, the duct connector 6 can be moved in the target direction by pulling the two traction ropes in and out.

[0031] The aforementioned negative pressure sealing connection mechanism 7 includes a sealing belt 71 disposed at the top of the exhaust cantilever pipe 4 for sealing the longitudinal ventilation opening 41, and four support rollers disposed within the duct connector 6. The support rollers are perpendicular to the exhaust cantilever pipe 4, extending from the first lower opening 61 to the second lower opening 62. The four support rollers are located at the four corners of the cavity above the first opening 61, including a pair of lower outer rollers 72 and a pair of upper inner rollers 73. The end of each support roller is fixed by contacting the inner wall of the duct connector 6. After the sealing belt 71 enters the duct connector 6, it winds sequentially along the first outer roller 72 → first inner roller 73 → second inner roller 73 → second outer roller 72. After winding, both outer rollers 72 are located between the sealing belt 71 and the inner wall of the duct connector 6, and both inner rollers 73 are located inside the sealing belt 71. The sealing belt 71 is supported by four rollers, causing the section of sealing belt 71 corresponding to the first opening 61 inside the duct connector 6 to move away from the exhaust cantilever pipe 4, even if the longitudinal vent 41 of the exhaust cantilever pipe 4 at that section is open. During operation, because the exhaust cantilever pipe 4 is in a negative pressure environment, the sealing belt 71 can adhere to and block the longitudinal vent 41. As the duct connector 6 moves, the longitudinal vent 41 section inside it is opened, forming a passage between the collection hood 1, the exhaust cantilever pipe 4, and the dust removal mechanism 9, while the longitudinal vent 41 outside the duct connector 6 remains closed, not affecting the overall air volume of the system.

[0032] The aforementioned lifting drive mechanism 8 includes a support platform 81 located below the exhaust cantilever pipe 4 and connected to the duct connector 6. A lifting motor is mounted on the support platform 81, and a winding shaft 82 is located at the output end of the lifting motor. The winding shaft 82 is parallel to the exhaust cantilever pipe 4, and each end of the winding shaft 82 is connected to a lifting rope 83 connected to the trapping hood 1. When the lifting motor operates, the lifting ropes 83 on both sides simultaneously wind up or unwind, thereby smoothly lifting or lowering the trapping hood 1. In this embodiment, the support platform 81 is located directly below the first lower opening 61 of the duct connector 6, with one end connected to the outer side wall of the duct connector 6 cavity where the second lower opening 62 is located, and the other end connected to the end of the support frame 51 of the translation drive mechanism 5. Since the support frame 51 is equipped with a translation motor 53 on its outer side and the support platform 81 is equipped with a lifting motor, the weight of the corrugated telescopic pipe 2 and the trap hood 1 connected to the duct connector 6 can be balanced, and the first lower opening 61 of the duct connector 6 can be tightly pressed onto the exhaust cantilever pipe 4 to prevent air leakage from the duct connector 6.

[0033] The aforementioned dust removal mechanism 9 is located outside the cutting and pouring area, and includes a dust collector 91 connected to the hose 10, and an exhaust fan 92 located at the outlet end of the dust collector 91.

[0034] During operation, the exhaust fan 92 is first turned on to put the system pipeline under negative pressure. Then, according to the specific work position of the small and medium casting cutting riser, the exhaust cantilever pipe 4 is rotated along the rotating shaft 31 to adjust its position. Then, the duct connector 6 is moved along the exhaust cantilever pipe 4 to the top of the target work position. After that, the collection hood 1 is adjusted to a suitable height through the lifting drive mechanism 8. At this time, all the flue gas generated by cutting the riser enters the collection hood 1 and enters the second lower opening 62 along the corrugated telescopic pipe 2. Then, it enters the exhaust cantilever pipe 4 through the first lower opening 61 of the duct connector 6 and finally is discharged into the dust collector through the hose 10. After dust removal, the qualified flue gas is discharged into the atmosphere through the exhaust fan 92.

[0035] The starting and stopping of the aforementioned exhaust fan 92, rotary motor, translation motor 53 and lifting motor can be centrally managed and intelligently linked through an automated control system, thereby improving control accuracy and reducing manual workload.

[0036] It should be noted that in the description of this utility model, terms such as "front", "rear", "left", "right", "vertical", "horizontal", "inner", and "outer" indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A cantilevered cutting riser flue gas collection device, characterized in that: The system includes a collection hood, a flue gas negative pressure transmission mechanism, and a dust removal mechanism. The head of the collection hood has a porous structure, and the tail of the collection hood is provided with a corrugated telescopic tube. The flue gas negative pressure transmission mechanism includes a rotary drive mechanism, which is connected to an exhaust cantilever pipe located above the cutting riser area. The exhaust cantilever pipe is provided with a duct connector connected to a translation drive mechanism. The duct connector has a first lower opening and a second lower opening. The first lower opening is opposite to the longitudinal ventilation port at the top of the exhaust cantilever pipe and is connected to it through a negative pressure sealing connection mechanism. The second lower opening is located on the outside of the exhaust cantilever pipe and is connected to the corrugated telescopic tube. The duct connector is also provided with a lifting drive mechanism, which is connected to the collection hood and is used to extend or retract the corrugated telescopic tube. A flexible hose connected to the dust removal mechanism is provided at one end of the exhaust cantilever pipe near the edge of the cutting riser area.

2. The cantilevered cutting riser flue gas collection device according to claim 1, characterized in that: The trapping hood has a conical structure, and the head of the trapping hood is provided with a perforated hood plate. The outer edge of the hood plate is provided with round or elliptical holes arranged in a double ring shape, and the porosity of the hood plate is 0.2 to 0.

4.

3. The cantilevered cutting riser flue gas collection device according to claim 1, characterized in that: The rotary drive mechanism is located outside the cutting riser area and includes a rotary motor. The output shaft of the rotary motor is connected to a vertically arranged rotary shaft through a belt drive mechanism. The rotary shaft is fixedly connected to the end of the exhaust cantilever pipe.

4. The cantilevered cutting riser flue gas collection device according to claim 1, characterized in that: The rotation radius of the exhaust cantilever pipe is equal to the width of the cutting riser area, and the end of the exhaust cantilever pipe away from the rotation drive mechanism is provided with a diagonal steel wire rope connected to the factory column.

5. The cantilevered cutting riser flue gas collection device according to claim 1, characterized in that: The duct connector includes an L-shaped sealed cavity structure with a first lower opening and a second lower opening, wherein the first lower opening is located on the higher bottom surface and the second lower opening is located on the lower bottom surface.

6. The cantilevered cutting riser flue gas collection device according to claim 1, characterized in that: The translation drive mechanism includes a support frame, which is located on the side of the duct connector away from the second lower opening. The top of the support frame is connected to the duct connector, and a horizontal support is provided at the bottom of the support frame. A translation motor is provided on the horizontal support, and the output shaft of the translation motor is connected to the drive wheel. The top surface of the drive wheel is connected to the bottom surface of the exhaust cantilever pipe.

7. The cantilevered cutting riser flue gas collection device according to claim 6, characterized in that: The translation drive mechanism also includes a driven wheel mounted on the duct connector. The top surface of the driven wheel is in contact with the bottom surface of the exhaust cantilever pipe and is correspondingly mounted to the drive wheel.

8. The cantilevered cutting riser flue gas collection device according to claim 1, characterized in that: The negative pressure sealing connection mechanism includes a sealing belt disposed at the top of the exhaust cantilever pipe for sealing the longitudinal vent, and a support roller shaft disposed inside the duct connector. The support roller shaft is perpendicular to the exhaust cantilever pipe and disposed at the four corners above the first lower opening. It includes a pair of lower outer roller shafts and a pair of upper inner roller shafts. The outer roller shafts are disposed between the sealing belt and the inner wall of the duct connector, and the inner roller shafts are disposed inside the sealing belt.

9. The cantilevered cutting riser flue gas collection device according to claim 1, characterized in that: The lifting drive mechanism includes a support platform located below the exhaust cantilever pipe and connected to the duct connector. A lifting motor is installed on the support platform, and a winding shaft is installed at the output end of the lifting motor. The winding shaft is arranged parallel to the exhaust cantilever pipe, and a lifting rope connected to the collection hood is installed at each end of the winding shaft.

10. The cantilevered cutting riser flue gas collection device according to claim 1, characterized in that: The dust removal mechanism is located outside the cutting and pouring area, and includes a dust collector connected to the hose. An exhaust fan is provided at the outlet end of the dust collector.

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