Auxiliary smoke exhaust device for plasma cutting machine

Abstract

The utility model provides an auxiliary smoke and dust exhaust device for a plasma cutting machine, comprising two smoke and dust collecting hoods, an induced draft fan, an induced draft duct and a smoke and dust filtering device arranged opposite to each other. The two smoke and dust collecting hoods are respectively arranged opposite to each other on both sides of the cutting nozzle of the plasma cutting machine, and can be closed together to form a hood body to surround the cutting nozzle of the plasma cutting machine. The induced draft fan and the smoke and dust filtering device are arranged on one side of the plasma cutting machine. One end of the induced draft duct is connected to the induced draft port of the induced draft fan, and the other end is connected to the inner cavity of one of the smoke and dust collecting hoods. The air outlet of the induced draft fan is connected to the input port of the smoke and dust filtering device, so that the smoke and dust generated by the plasma cutting machine during the cutting process can be extracted by the induced draft fan and discharged into the smoke and dust filtering device for filtering and purification. After the two smoke and dust collecting hoods are closed together, the smoke and dust generated by the plasma cutting machine during the cutting process can be effectively shielded, and the smoke and dust are gathered in the hood body to reduce the dispersion of the smoke and dust.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary smoke and dust exhaust, in particular to an auxiliary smoke and dust exhaust device for a plasma cutting machine. Background Art

[0002] A plasma cutting machine is a machine that uses high-temperature and high-speed plasma gas to cut materials (such as metal). It is widely used in the field of metal processing, but it produces a lot of smoke and dust during the cutting process. These smoke and dust contain harmful substances, which pose a threat to the working environment and the health of workers. Therefore, measures need to be taken to control the smoke and dust.

[0003] Existing smoke and dust exhaust devices generally set a smoke collection hood on one side of the cutting nozzle of the plasma cutting machine to suck the smoke and dust generated during the cutting process. For example, patent application number CN202111349620.2 discloses a plasma cutting machine provided with a smoke collection and purification mechanism, wherein a smoking box is installed at the side end of the plasma cutting device, an exhaust device is fixedly connected to the inside of the smoking box, a No. 1 smoke pipe is fixedly connected to the bottom end of the smoking box, a smoking head is fixedly connected to the bottom end of the No. 1 smoke pipe, and a smoking head is fixedly connected to the bottom end of the No. 1 smoke pipe. The exhaust device sucks the smoke and dust generated by the plasma cutting device during the cutting process into the smoking head through the No. 1 smoke pipe of the smoking head, and the smoke and dust enter the filter after passing through the No. 1 smoke pipe. The smoke collecting and purifying mechanism still has the following problems in actual use: since the cutting principle of the plasma cutting device is to utilize plasma gas to spray out at an extremely high speed, the high temperature generated instantly causes the metal on the surface of the material to melt rapidly, forming a gap, and the molten metal is blown away by the high-speed plasma gas. Therefore, during the cutting process, the smoke generated will also be scattered under the action of the plasma gas jet, and the smoke collecting and purifying mechanism has a smoke extraction head only arranged on one side of the plasma cutting device, and the suction port has a small coverage area, which cannot effectively suck the smoke generated during the cutting process, and the smoke removal effect is not ideal. Utility Model Content

[0004] In view of this, it is necessary to provide an auxiliary smoke and dust exhaust device for a plasma cutting machine, which can effectively extract the smoke and dust generated during the cutting process to solve the technical problems existing in the above-mentioned technology.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The invention relates to an auxiliary smoke exhaust device for a plasma cutting machine, which is used to surround the cutting nozzle of the plasma cutting machine so as to extract and purify the smoke generated during the cutting process. The auxiliary smoke exhaust device for the plasma cutting machine comprises two smoke collecting hoods, an induced draft fan, an induced draft duct and a smoke filter device which are arranged opposite to each other. The two smoke collecting hoods are respectively arranged opposite to each other on both sides of the cutting nozzle of the plasma cutting machine and can be closed together to form a hood body so as to surround the cutting nozzle of the plasma cutting machine. The induced draft fan and the smoke filter device are arranged on one side of the plasma cutting machine, one end of the induced draft duct is connected to the induced draft port of the induced draft fan, and the other end thereof is connected to the inner cavity of one of the smoke collecting hoods, and the air outlet of the induced draft fan is connected to the input port of the smoke filter device so as to extract the smoke generated during the cutting process of the plasma cutting machine through the induced draft fan and discharge it into the smoke filter device for filtering and purification.

[0007] Preferably, it also includes a guide rail, which is horizontally installed directly below the cutting nozzle of the plasma cutting machine, and the two ends of the guide rail are respectively extended to both sides of the cutting nozzle. The two smoke collection hoods are respectively installed on the guide rail and are respectively located on both sides of the cutting nozzle of the plasma cutting machine. The two smoke collection hoods can move in opposite directions along the guide rail and close to each other to surround the cutting nozzle of the plasma cutting machine.

[0008] Preferably, the air duct is a corrugated hose or a rubber-plastic hose.

[0009] Preferably, telescopic pushing devices are respectively provided at both ends of the guide rail, and the telescopic ends of the telescopic pushing devices are respectively connected to the two smoke collection hoods, and can respectively push the two smoke collection hoods to move towards each other, so that the two smoke collection hoods can be closed or separated from each other.

[0010] Preferably, the telescopic pushing device is a hydraulic cylinder or a pneumatic cylinder.

[0011] Preferably, first notches for the cut materials to pass through are provided on the side walls on opposite sides of the two smoke and dust collecting hoods, and first elastic shielding curtains are respectively provided on the first notches.

[0012] Preferably, a second notch for a robot arm of a plasma cutting machine to pass through is provided on the top walls opposite to each other of the two smoke and dust collecting hoods, and a second elastic shielding curtain is provided on the second notch.

[0013] Preferably, the first elastic shielding curtain and the second elastic shielding curtain are both multi-piece structures.

[0014] Preferably, the smoke filtering device is a boiler smoke dust collector or a spray dust collector.

[0015] Preferably, a collecting box with an open upper end is mounted at the lower end of the guide rail, and the collecting box is located directly below the cutting nozzle of the plasma cutting machine. The lower ends of the two smoke collecting hoods are open. When the two smoke collecting hoods are closed, their lower ends are opposite to the openings of the collecting box, and the waste slag generated by the plasma cutting machine during the cutting process is collected through the collecting box.

[0016] It can be seen from the above technical scheme that the auxiliary smoke exhaust device for the plasma cutting machine provided in the present application includes two relatively arranged smoke collection hoods, an induced draft fan, an induced draft duct and a smoke dust filtering device. The two smoke collection hoods are respectively mounted on both sides of the cutting nozzle of the plasma cutting machine opposite to each other, and can be closed together to form a hood body to surround the cutting nozzle of the plasma cutting machine. The induced draft fan and the smoke dust filtering device are arranged on one side of the plasma cutting machine, one end of the induced draft duct is connected to the induced draft port of the induced draft fan, and the other end thereof is connected to the inner cavity of one of the smoke collection hoods, and the air outlet of the induced draft fan is connected to the input port of the smoke dust filtering device, so that the smoke generated by the plasma cutting machine during the cutting process can be extracted by the induced draft fan and discharged into the smoke dust filtering device for filtration and purification. When the two smoke collection hoods are closed together, they can effectively block the smoke generated by the plasma cutting machine during the cutting process, gather the smoke in the hood, reduce the dispersion of smoke, and enable the induced draft fan to effectively extract the smoke, reducing the threat of smoke to the working environment and workers' health. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the smoke and dust collecting hood of the utility model in a closed state.

[0018] Figure 2 This is a schematic diagram of the smoke and dust collecting hood of the utility model in an open state.

[0019] Figure 3 It is a front structural schematic diagram of the utility model.

[0020] In the figure: a cutting nozzle 1, a smoke collecting hood 2, an induced draft fan 3, an induced draft duct 4, a smoke filtering device 5, a guide rail 6, a telescopic pushing device 7, a first elastic shielding curtain 8, a second elastic shielding curtain 9, a pulley 10, and a collecting box 11. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Please see Figures 1 to 3The embodiment of the utility model provides an auxiliary smoke exhaust device for a plasma cutting machine, which is used to surround the cutting nozzle 1 of the plasma cutting machine to extract and purify the smoke generated during the cutting process. The auxiliary smoke exhaust device for the plasma cutting machine comprises two relatively arranged smoke collection hoods 2, an induced draft fan 3, an induced draft duct 4 and a smoke filter 5. The two smoke collection hoods 2 are respectively mounted on both sides of the cutting nozzle 1 of the plasma cutting machine opposite to each other. The cover openings of the two smoke collection hoods 2 match and face the cutting nozzle 1 of the plasma cutting machine. The two smoke collection hoods 2 can move toward the cutting nozzle 1 of the plasma cutting machine respectively so that their cover openings are closed and contacted with each other to form a cover body to surround the cutting nozzle 1 of the plasma cutting machine. The induced draft fan 3 and the smoke filter 5 are arranged on one side of the plasma cutting machine. The induced draft duct 4 is a corrugated hose or a rubber-plastic hose. One end of the duct 4 is connected with the air duct of the induced draft fan 3, and the other end of the induced draft duct 4 is arranged on the upper end of the outer wall of one of the smoke and dust collecting hoods 2 and is connected with its inner cavity. The air outlet of the induced draft fan 3 is connected with the input port of the smoke and dust filtering device 5. When the plasma cutting machine performs cutting operation, the two smoke and dust collecting hoods 2 can be manually moved toward the cutting nozzle 1 of the plasma cutting machine so that the two smoke and dust collecting hoods 2 are closed together into a hood body to surround the cutting nozzle 1 of the plasma cutting machine. When the smoke and dust collecting hood 2 is moved, the induced draft duct 4 can move adaptively following the position of the smoke and dust collecting hood 2 without limiting the position of the smoke and dust collecting hood 2. After the two smoke and dust collecting hoods 2 are closed together, the smoke and dust generated by the plasma cutting machine during the cutting process can be effectively enclosed, so that the smoke and dust are gathered in the hood body to reduce the dispersion of smoke and dust, and the induced draft fan 3 can effectively extract the smoke and dust and input it into the smoke and dust filtering device 5 for filtering and purification.

[0023] Please see Figure 1 or Figure 2Furthermore, in order to facilitate the movement of the smoke collection hood 2, the auxiliary smoke exhaust device for the plasma cutting machine is also provided with a guide rail 6, which is horizontally mounted just below the cutting nozzle 1 of the plasma cutting machine. The guide rail 6 adopts a double-track design and is fixed to the plasma cutting machine or the material conveying rack by bolts. The two ends of the guide rail 6 are respectively extended in the two sides of the cutting nozzle 1. The two smoke collection hoods 2 are respectively mounted on the guide rail 6 and are respectively located on both sides of the cutting nozzle 1 of the plasma cutting machine. The hood openings of the two smoke collection hoods 2 are respectively facing the cutting nozzle 1 of the plasma cutting machine. The lower ends of the two smoke collection hoods 2 are respectively provided with pulleys 10 matching the guide rail 6. The pulley 10 is mounted on the guide rail 6, so that the two smoke collection hoods 2 can move in opposite directions along the guide rail 6, so that the two smoke collection hoods 2 can be closed together to surround the cutting nozzle 1 of the plasma cutting machine. In addition, telescopic pushing devices 7 are respectively provided at both ends of the guide rail 6. The telescopic pushing devices 7 can be hydraulic cylinders or pneumatic cylinders. The telescopic direction of the hydraulic cylinders or pneumatic cylinders is parallel to the guide rail 6, and the telescopic ends thereof are respectively fixedly connected to the two smoke collecting hoods 2. The hydraulic cylinders or pneumatic cylinders are powered by an external hydraulic press or air compressor, and are controlled by a solenoid valve to perform telescopic movements, and are used to drive the two smoke collecting hoods 2 to move in opposite directions along the guide rail 6, so that the two smoke collecting hoods 2 are closed or separated from each other. Before the cutting operation of the auxiliary smoke exhaust device is performed, the two smoke collecting hoods 2 are in a separated state, that is, they are away from the cutting nozzle 1 of the plasma cutting machine, so as to facilitate the staff to calibrate and observe the position of the cutting nozzle 1 of the plasma cutting machine. When cutting, the two smoke collecting hoods 2 are in a closed state to surround the cutting nozzle 1 of the plasma cutting machine, so as to collect the smoke generated during the cutting process.

[0024] Please continue to see Figure 1 or Figure 2 In the above embodiment, first notches are provided on the side walls on opposite sides of the two smoke and dust collecting hoods 2 for the materials cut by the plasma cutting machine to pass through. After the two smoke and dust collecting hoods 2 are closed, the first notches are opposite to each other to form a passage for the cut materials to pass through. In order to improve the airtightness at the first notch, first elastic shielding curtains 8 are respectively provided on the first notch. The first elastic shielding curtains 8 are made of rubber belt or fiber cloth and adopt a multi-piece structure to shield in parallel at the first notch. When the cut material passes through, the first elastic shielding curtains 8 can be adaptively deformed according to the shape of the material to form a shield between the first notch and the material, thereby reducing the smoke and dust from overflowing from the first notch.

[0025] Second notches are opened opposite to each other on the top walls of the two smoke and dust collecting hoods 2. After the two smoke and dust collecting hoods 2 are closed, the second notches are opposite to each other to form a channel for the robot arm of the plasma cutting machine to pass through. A second elastic shielding curtain 9 is arranged on the second notch. The second elastic shielding curtain 9 is also made of rubber belt or fiber cloth and adopts a multi-piece structural design to shield in parallel at the second notch. The second elastic shielding curtain 9 adaptively deforms according to the shape and position of the robot arm of the plasma cutting machine to block the gap between the robot arm of the plasma cutting machine and the second notch, thereby improving the airtightness of the smoke and dust collecting hood 2, reducing the overflow of smoke from the first notch, and not affecting the displacement of the robot arm of the plasma cutting machine.

[0026] In the above embodiment, smoke generated by the plasma cutting machine during cutting is sucked into the smoke filter device 5 through the induced draft fan 3, and dust reduction and purification treatment is carried out through the smoke filter device 5. The smoke filter device 5 is a spray dust collector, which uses water as an absorption and washing medium, so that dust particles in the smoke are absorbed and flow to the sedimentation tank with water, and then discharged through the drain pipe, thereby achieving the purpose of dust removal. The smoke filter device 5 can also use a boiler smoke dust collector to process the smoke. Both the spray dust collector and the boiler smoke dust collector belong to the well-known technology, and the use technology is mature, and its specific structure is not repeated here.

[0027] Please continue to see Figure 1 or Figure 3 Furthermore, in order to facilitate the cleaning of waste residue during cutting, a collecting box 11 with an open upper end is set at the lower end of the guide rail 6, and the collecting box 11 is located directly below the cutting nozzle 1 of the plasma cutting machine. The lower ends of the two smoke and dust collecting covers 2 are open. When the two smoke and dust collecting covers 2 are closed, their lower ends are opposite to the openings of the collecting box 11. The waste residue generated by the plasma cutting machine during the cutting process will fall into the collecting box 11 under the action of gravity, and the collecting box 11 can slide along the guide rail 6 for easy removal and cleaning.

[0028] The above disclosure is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

1. An auxiliary smoke and dust exhaust device for a plasma cutting machine, wherein the auxiliary smoke and dust exhaust device for a plasma cutting machine is provided with a fence around the cutting nozzle of the plasma cutting machine to extract and purify the smoke and dust generated during the cutting process, and is characterized in that: The auxiliary smoke exhaust device for the plasma cutting machine includes two relatively arranged smoke collecting hoods, an induced draft fan, an induced draft duct and a smoke filtering device. The two smoke collecting hoods are respectively mounted on both sides of the cutting nozzle of the plasma cutting machine opposite to each other, and can be closed together to form a hood body to surround the cutting nozzle of the plasma cutting machine. The induced draft fan and the smoke filtering device are arranged on one side of the plasma cutting machine, one end of the induced draft duct is connected to the induced draft port of the induced draft fan, and the other end thereof is connected to the inner cavity of one of the smoke collecting hoods, and the air outlet of the induced draft fan is connected to the input port of the smoke filtering device, so that the smoke generated by the plasma cutting machine during the cutting process can be extracted by the induced draft fan and discharged into the smoke filtering device for filtration and purification.

2. The auxiliary smoke and dust exhaust device for a plasma cutting machine according to claim 1, characterized in that: It also includes a guide rail, which is horizontally installed directly below the cutting nozzle of the plasma cutting machine, and the two ends of the guide rail are respectively extended to the two sides of the cutting nozzle. The two smoke and dust collection hoods are respectively installed on the guide rail and are respectively located on the two sides of the cutting nozzle of the plasma cutting machine. The two smoke and dust collection hoods can move towards each other along the guide rail and close to each other to surround the cutting nozzle of the plasma cutting machine.

3. The auxiliary smoke and dust exhaust device for a plasma cutting machine according to claim 2, characterized in that: The air duct is a corrugated hose or a rubber-plastic hose.

4. The auxiliary smoke and dust exhaust device for a plasma cutting machine according to claim 3, characterized in that: The guide rail Telescopic pushing devices are respectively provided at both ends, and the telescopic ends of the telescopic pushing devices are respectively connected to the two smoke collecting covers, and can respectively push the two smoke collecting covers to move towards each other, so that the two smoke collecting covers are closed or separated from each other.

5. The auxiliary smoke and dust exhaust device for a plasma cutting machine according to claim 4, characterized in that: The telescopic pushing device is a hydraulic cylinder or a pneumatic cylinder.

6. The auxiliary smoke and dust exhaust device for a plasma cutting machine according to claim 5, characterized in that: First notches for the cut materials to pass through are provided on the side walls on opposite sides of the two smoke and dust collecting covers, and first elastic shielding curtains are respectively provided on the first notches.

7. The auxiliary smoke and dust exhaust device for a plasma cutting machine according to claim 6, characterized in that: A second notch for the mechanical arm of the plasma cutting machine to pass through is provided on the top walls opposite to each other of the two smoke and dust collecting covers, and a second elastic shielding curtain is provided on the second notch.

8. The auxiliary smoke and dust exhaust device for a plasma cutting machine according to claim 7, characterized in that: The first elastic shielding curtain and the second elastic shielding curtain are both multi-piece structures.

9. The auxiliary smoke and dust exhaust device for a plasma cutting machine according to claim 1 or 8, characterized in that: The smoke filtering device is a boiler smoke dust collector or a spray type dust collector.

10. The auxiliary smoke and dust exhaust device for a plasma cutting machine according to claim 2, characterized in that: A collecting box with an open upper end is mounted at the lower end of the guide rail, and the collecting box is located directly below the cutting nozzle of the plasma cutting machine. The lower ends of the two smoke collecting hoods are open. When the two smoke collecting hoods are closed, their lower ends are opposite to the openings of the collecting box, and the waste slag generated by the plasma cutting machine during the cutting process is collected through the collecting box.

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