Automatic smoke collecting system for machining workshop

Abstract

The invention relates to the technical field of flue gas, in particular to a machining workshop flue gas automatic collecting system which comprises a closed heading machine and a screw tail drilling machine and further comprises a supporting frame, a hopper and a main exhaust pipe, the closed heading machine and the screw tail drilling machine are arranged side by side, the supporting frame is arranged in front of the closed heading machine and the screw tail drilling machine, the hopper is arranged on the supporting frame, and the main exhaust pipe is arranged in front of the closed heading machine and the screw tail drilling machine. The main exhaust pipe is arranged on supporting legs of the supporting frame, the hopper is provided with an electromagnet and a movable raft plate so that the bottom of the hopper can be opened and closed, and the main exhaust pipe is provided with an extraction valve so that smoke generated in the machining process can be sucked. By arranging the branch exhaust pipes directly connected with the forming positions of the closed heading machine and the screw tail drilling machine and the main exhaust pipe provided with the extraction valve, lubricating oil smoke generated in a deformation area can be synchronously and actively sucked when machining is started, the smoke is directionally guided into the collecting box, and the machining efficiency is improved. The diffusion of the flue gas in equipment and workshop environments is obviously reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas collection, in particular to a flue gas automatic collection system for a machining workshop. BACKGROUND

[0002] In the production process of bolt fasteners, machining workshops are generally faced with the problem of flue gas pollution caused by metal plastic deformation. For example, when a closed head forming machine is used to punch a wire rod to form a bolt head, the high temperature generated by the severe deformation of the material will cause the lubricating oil applied to the machining area to vaporize rapidly, forming a large amount of flue gas with odor and oil mist. Similarly, in the process of machining the tail end of a screw drill by a screw drill tail machining machine, metal cutting and forming are accompanied by high temperature, which causes the lubricating oil to evaporate and generate smoke. If these flue gases are not effectively controlled, they will spread around the equipment, adhere to the machine tool surface, electrical components and workshop walls, and long-term accumulation will form oil stains, not only accelerating the aging of the equipment and increasing the maintenance cost, but also worsening the working environment and affecting the health of the operators.

[0003] Traditional workshops usually use high-power exhaust fans or top ventilation systems for ventilation, but such methods can only achieve local dilution or transfer of flue gas, and cannot effectively capture and collect flue gas at the source. Flue gas still spreads in the workshop, and open exhaust may cause oil mist to drift to the external environment of the plant. In addition, the processed screws, bolts and other materials are usually directly dropped into open collection containers or conveying belts, and the collision of the materials when falling can easily cause debris to splash, further increasing the difficulty of cleaning. At the same time, the material collection link lacks automatic control, for example, when the vibrating disc receives the material, manual observation of the material level height is required to adjust or transfer the material in time to prevent accumulation and overflow, which increases the labor intensity of the operators and may cause downtime or material scattering due to untimely monitoring.

[0004] Therefore, there is an urgent need for an integrated system that can actively collect flue gas from the source, achieve orderly material conveying and have automatic control function to solve the above problems.

[0005] To this end, we propose a flue gas automatic collection system for a machining workshop. SUMMARY

[0006] One of the technical problems to be solved by the present application is the need for an integrated system that can actively collect flue gas from the source, achieve orderly material conveying and have automatic control function.

[0007] To solve the above technical problems, the embodiment of the present application provides a kind of machining workshop smoke automatic collection system, including closed head machine, screw tail drilling machine, still including support frame, hopper, main exhaust pipe, closed head machine, screw tail drilling machine are arranged side by side, support frame is set in closed head machine, screw tail drilling machine front, hopper is set on support frame, main exhaust pipe is set on the support frame of support leg;Hopper is provided with electromagnet, mobile raft, to open and close at the bottom of hopper, main exhaust pipe is provided with suction valve, to suck the smoke in processing process.

[0008] In some embodiments, the screw tail drilling machine includes a vibrating disc, a height sensor is disposed on the disc side wall of the vibrating disc, and a disc bottom is disposed below the height sensor to receive materials during processing.

[0009] In some embodiments, the support leg is disposed on one side of the support frame close to the closed head machine and the screw tail drilling machine, and the support leg is fixedly connected with the main exhaust pipe.

[0010] In some embodiments, the main exhaust pipe includes a first sub-exhaust pipe and a second sub-exhaust pipe, each connected to the closed head machine and the screw tail drilling machine at one end, and the other end of the first sub-exhaust pipe and the second sub-exhaust pipe is connected to the main exhaust pipe, and the main exhaust pipe is provided with a suction valve above.

[0011] In some embodiments, one end of the suction valve is connected to the collection box through a connecting pipe, the other end of the suction valve is connected to the main exhaust pipe through a connecting pipe, and the main exhaust pipe is electrically connected with the electromagnet.

[0012] In some embodiments, a plastic film is disposed below the hopper to prevent material splashing.

[0013] In some embodiments, the hopper includes a first side edge, a second side edge, a bottom plate, and an inclined edge, which form a space for receiving materials, the bottom plate is provided with a through opening for materials to pass through, and the second side edge is provided with an electromagnet at the bottom.

[0014] In some embodiments, the first side edge is provided with a guide groove near the bottom position, the guide groove is provided with a connecting block, the inside of the connecting block is fixedly connected with a spring, and the other end of the spring is fixed on the wall of the guide groove.

[0015] In some embodiments, the hopper further includes a mobile raft, the mobile raft is a square plate, the mobile raft is provided with a guide block at the front end of both sides, the guide block can move in the guide groove, the cross section of the guide block is the same as that of the connecting block, and the bottom plate is provided with a through hole for the mobile raft to pass through.

[0016] In some embodiments, the mobile raft is provided with a handle at the tail end, which is convenient for taking out the mobile raft for cleaning when the machine is stopped, the electromagnet generates a repulsive force to push the mobile raft away from the bottom plate when the electromagnet is powered on, so as to open the discharge through hole of the bottom plate, and the electromagnet attracts the mobile raft when the electromagnet is not powered on.

[0017] The present application has at least the following advantages: 1. By setting up a separate exhaust pipe directly connected to the forming position of the closed head machine and screw tail drilling machine, and a main exhaust pipe equipped with an exhaust valve, the lubricating oil fumes generated in the deformation area can be actively sucked synchronously when the processing starts. The fumes are directed into the collection box, significantly reducing the diffusion of fumes in the equipment and workshop environment, improving the air quality of the workplace, and protecting the production equipment from oil deposition.

[0018] 2. The bottom of the hopper is designed with an opening and closing mechanism that works cooperatively with electromagnets and a movable raft. When the equipment starts and the exhaust valve works, the electromagnets are powered to generate a repulsive force to move the movable raft, automatically opening the discharge hole at the bottom of the hopper, allowing the finished screws to fall smoothly into the vibration disc below. This linkage design ensures the synchronous start of material discharge and processing.

[0019] 3. The height sensor provided on the vibration disc provides real-time monitoring of the material accumulation state. When the screw accumulation height in the vibration disc reaches the preset threshold, the height sensor triggers a signal to control the de-energization of the electromagnet. After the electromagnet is de-energized, its repulsive force disappears, and the pre-compressed spring restores its extension, pushing the movable raft back to its original position, automatically closing the discharge port of the hopper, preventing excessive material accumulation and overflow. This closed-loop control reduces the need for manual intervention.

[0020] 4. The plastic film structure below the hopper serves as a physical barrier, effectively blocking any splashing that may occur during material falling, further maintaining the cleanliness of the surrounding area. The structural design of the hopper, including the cooperation of the guide groove, connecting block, and spring, as well as the guide block on the movable raft, ensures smooth and stable opening and closing actions of the movable raft. The handle design at the tail of the movable raft facilitates its removal and cleaning during maintenance, improving the maintainability of the equipment.

[0021] 5. The entire system layout is compact and reasonable, with a support frame placed in front of the equipment, a hopper placed on it, and a main exhaust pipe fixed to the support frame's support leg. This high integration of fume collection, material receiving and discharge function modules saves workshop space. The system realizes the automatic operation process of fume suction, material discharge opening and closing, and material level monitoring through electrical connection (main exhaust pipe and electromagnet electrical connection) and mechanical linkage, improving the continuity and efficiency of the production process. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is Figure 1 is an enlarged view of position A in FIG. 4; Figure 3 is Figure 1Enlarged view at B; Figure 4 For Figure 1 Enlarged view at C; Figure 5 For Figure 6 For Figure 5 Enlarged view at D; Figure 7 For Figure 8 For Figure 9 For Figure 10 For Figure 9 Sectional view at E-E; Figure 11 For Figure 10 Enlarged view at F.

[0023] In the figure, 100 - closed head machine; 200 - screw drill tail machine; 201 - vibration disc; 2011 - disc side wall; 2012 - height sensor; 2013 - disc bottom; 300 - support frame; 301 - support leg; 400 - hopper; 4001 - plastic film; 401 - side one; 4011 - guide groove; 4012 - connecting block; 4013 - spring; 402 - side two; 4021 - electromagnet; 403 - bottom plate; 404 - bevel edge; 405 - moving raft; 4051 - guide block; 4052 - handle; 500 - main exhaust pipe; 501 - sub-exhaust pipe one; 502 - connecting pipe; 503 - collection box; 504 - sub-exhaust pipe two; 505 - air suction valve. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0025] Example 1, see Figures 1-11The application provides a technical scheme: a machining workshop flue gas automatic collection system, comprising a closed head cutting machine 100, a screw tail drilling machine 200, further comprising a support frame 300, a hopper 400, a main exhaust pipe 500, the closed head cutting machine 100 and the screw tail drilling machine 200 are arranged side by side, the support frame 300 is arranged in front of the closed head cutting machine 100 and the screw tail drilling machine 200, the hopper 400 is arranged on the support frame 300, and the main exhaust pipe 500 is arranged on a supporting leg 301 of the support frame 300; the hopper 400 is provided with an electromagnet 4021 and a movable raft plate 405 to open and close the bottom of the hopper 400, and the main exhaust pipe 500 is provided with an exhaust valve 505 to suck flue gas in the machining process.

[0026] Specifically, the principle of the design is that the support frame 300 is arranged in front of the closed head cutting machine 100 and the screw tail drilling machine 200 to provide stable support for the hopper 400, so that the material receiving position is kept at a reasonable distance from the machining equipment. The hopper 400 is fixed to the support frame 300, and the controllable opening and closing mechanism arranged at the bottom of the hopper 400 is composed of the electromagnet 4021 and the movable raft plate 405. The movable raft plate 405 slides in the guide groove 4011 of the side edge one 401 through the guide block 4051 to open and close the discharge hole of the bottom plate 403. The main exhaust pipe 500 is fixed to the supporting leg 301 of the support frame 300, and the branch exhaust pipe one 501 and the branch exhaust pipe two 504 are connected to the forming stations of the screw tail drilling machine 200 and the closed head cutting machine 100 respectively, and a negative pressure suction channel is formed through the exhaust valve 505.

[0027] The purpose of the design is that the main exhaust pipe 500 directly connects to the equipment forming stations through the branch exhaust pipe one 501 and the branch exhaust pipe two 504 to actively suck the flue gas at the moment of vaporization of the lubricating oil, so that the flue gas is prevented from escaping around the equipment. When the exhaust valve 505 is started, the negative pressure airflow generated by the exhaust valve 505 guides the flue gas into the collection box 503 through the connecting pipe 502 to realize directional collection of the pollution source. Secondly, the electromagnet 4021 of the hopper 400 is electrically connected to the main exhaust pipe 500 to form linkage between material discharge and flue gas suction. When the equipment is started, the electromagnet 4021 is powered on when the exhaust valve 505 works, a repulsive force is generated to push the movable raft plate 405 to move outward, the bottom channel of the hopper 400 is opened synchronously, and the completed screws are automatically dropped into the bottom 2013 of the vibration disc 201.

[0028] The advantages of such design are: first, the space layout is optimized, the support frame 300 simultaneously bears the functions of supporting the hopper 400 and fixing the main exhaust pipe 500, thereby reducing the equipment footprint. Second, the degree of automation is improved, the height sensor 2012 monitors the material accumulation height in the vibration disc 201, and when the material touches the sensor position, the power supply of the electromagnet 4021 is automatically cut off, the spring 4013 pushes the movable raft 405 to reset and close the discharge port, thereby preventing material overflow. Third, the protection performance is enhanced, the plastic film 4001 arranged below the hopper 400 can physically block the splashing of the falling material, keeping the equipment clean. The handle 4052 at the tail of the movable raft 405 facilitates removal and cleaning during maintenance, improving the operability of the equipment. The entire system is electrically linked and cooperates with the mechanical structure to realize the synchronous improvement of the smoke collection efficiency and the stability of the material conveying.

[0029] Embodiment 2, see Figures 1-11 The screw tail drilling machine 200 comprises a vibration disc 201, a height sensor 2012 is arranged on the disc side wall 2011 of the vibration disc 201, and a disc bottom 2013 is arranged below the height sensor 2012 to contain the material in the processing process; the support leg 301 is arranged on the support frame 300 close to the closed head drilling machine 100 and the screw tail drilling machine 200 on one side, and the support leg 301 is fixedly connected with the main exhaust pipe 500.

[0030] Specifically, the principle of such design is that the height sensor 2012 is installed on the disc side wall 2011 of the vibration disc 201, the detection surface thereof is vertically directed to the material accumulation surface of the disc bottom 2013, thereby forming a real-time material level monitoring structure. The support leg 301 is fixed to the support frame 300 close to the side edges of the closed head drilling machine 100 and the screw tail drilling machine 200, so that the installation position of the main exhaust pipe 500 is close to the main body of the equipment, and the shortest connection path is provided for the branch exhaust pipe one 501 and the branch exhaust pipe two 504.

[0031] The purpose of such design is that the height sensor 2012 continuously monitors the accumulation height of the screw on the disc bottom 2013, and when the material touches the sensor detection position, an electrical signal is generated to cut off the power supply of the electromagnet 4021. After the electromagnet 4021 is powered off, the adsorption of the movable raft 405 is lost, and at the same time the spring 4013 releases the elastic force to push the guide block 4051 of the movable raft 405 along the guide groove 4011, until the movable raft 405 completely closes the discharge hole of the hopper 400 bottom plate 403, thereby preventing the material from continuing to fall. Second, the position design of the support leg 301 ensures that the distance between the main exhaust pipe 500 and the equipment is minimized, the branch exhaust pipe one 501 and the branch exhaust pipe two 504 can connect the smoke escape points of the screw tail drilling machine 200 and the closed head drilling machine 100 with the shortest path, thereby reducing the pipeline pressure loss.

[0032] The advantages of such design are: first, to avoid excessive material accumulation, the trigger control of height sensor 2012 replaces manual observation to prevent the vibration disc 201 from stopping due to material overflow. Second, to improve the efficiency of smoke collection, the support leg 301 makes the main exhaust pipe 500 close to the equipment, shortens the length of the first branch exhaust pipe 501 and the second branch exhaust pipe 504, and reduces the energy consumption of the exhaust valve 505. Third, to enhance the stability of the system, the main exhaust pipe 500 is rigidly connected to the support frame 300 through the support leg 301 to avoid displacement of the pipeline caused by equipment vibration. In addition, the signal linkage control of the height sensor 2012 turns on and off the electromagnet 4021, forming a closed-loop response between material conveying and material level state, reducing the need for manual intervention.

[0033] Embodiment 3, see Figures 1-11 The main exhaust pipe 500 includes a first branch exhaust pipe 504 and a first branch exhaust pipe 501 respectively connected to the forming position of the closed head machine 100 and the screw tail machine 200, and the other end of the first branch exhaust pipe 501 and the second branch exhaust pipe 504 is connected to the main exhaust pipe 500. The upper part of the main exhaust pipe 500 is provided with an exhaust valve 505.

[0034] One end of the exhaust valve 505 is connected to the collection box 503 through the connecting pipe 502, and the other end of the exhaust valve 505 is connected to the main exhaust pipe 500 through the connecting pipe 502. The main exhaust pipe 500 is electrically connected to the electromagnet 4021.

[0035] Specifically, the principle of such design is that the first branch exhaust pipe 501 and the second branch exhaust pipe 504 are directly connected to the forming stations of the screw tail machine 200 and the closed head machine 100 respectively, forming the smoke capture entrance. The other ends of the two branch exhaust pipes are merged into the main exhaust pipe 500, and the exhaust valve 505 is installed on the upper part of the main exhaust pipe 500. The exhaust valve 505 is connected to the main exhaust pipe 500 and the collection box 503 through the connecting pipe 502, forming a closed air flow channel. The main exhaust pipe 500 and the electromagnet 4021 of the hopper 400 are electrically connected to form an electrical signal transmission path.

[0036] The purpose of such design is that the first branch exhaust pipe 501 and the second branch exhaust pipe 504 are close to the equipment forming position, which can capture the smoke at the moment of lubricating oil gasification, and then the negative pressure generated by the exhaust valve 505 can press the smoke into the collection box 503 through the connecting pipe 502 for centralized treatment. Secondly, through electrical linkage, the main exhaust pipe 500 and the electromagnet 4021 are electrically connected to make the electromagnet 4021 energized synchronously when the exhaust valve 505 is started, which drives the movable raft 405 to open the channel at the bottom of the hopper 400, ensuring that the material discharge and smoke suction are performed synchronously.

[0037] The advantages of such design are: first, to improve the collection of flue gas, the short distance direct connection design of the first exhaust pipe 501 and the second exhaust pipe 504 reduces the pipe bending and reduces the airflow resistance, thereby improving the pumping efficiency. Second, to realize the coordinated operation of the system, the electrical signal transmission function of the main exhaust pipe 500 makes the action of the electromagnet 4021 synchronous with the start and stop of the exhaust valve 505, avoiding the delay or advance of material discharge. Third, to simplify the operation process, the operator only needs to start the equipment, and the exhaust valve 505 works automatically to trigger the dual functions of flue gas collection and material discharge, reducing the manual operation link. The centralized processing design of the collection box 503 facilitates unified cleaning or purification in the later stage, reducing the maintenance frequency.

[0038] Embodiment 4, see Figures 1-11 The hopper 400 is provided below with a plastic film 4001 to prevent material splashing. The hopper 400 includes a side edge one 401, a side edge two 402, a bottom plate 403, and a beveled edge 404, which form a space for receiving material. The bottom plate 403 is provided at the bottom with a through opening for the material to pass through, and the side edge two 402 is provided at the bottom with an electromagnet 4021.

[0039] The side edge one 401 is provided near the bottom position with a guide groove 4011, and the guide groove 4011 is provided with a connecting block 4012. The connecting block 4012 is fixedly connected with a spring 4013 on the inner side, and the other end of the spring 4013 is fixed on the wall of the guide groove 4011.

[0040] The hopper 400 further includes a movable raft 405, which is a square plate. The movable raft 405 is provided at both sides with a guide block 4051, which can move in the guide groove 4011. The cross section of the guide block 4051 is the same as that of the connecting block 4012. The bottom plate 403 is provided with a through hole for the movable raft 405 to pass through.

[0041] The movable raft 405 is provided at the tail end with a handle 4052, which facilitates the removal of the movable raft 405 for cleaning when the machine is stopped. When the electromagnet 4021 is powered on, it generates a repulsive force to push the movable raft 405 away from the bottom plate 403, so as to open the discharge hole of the bottom plate 403. When the electromagnet 4021 is not powered on, it attracts the movable raft 405.

[0042] Specifically, the principle is to achieve precise opening and closing of the bottom passage of the hopper 400 through mechanical transmission and electromagnetic control. The bottom plate 403 of the hopper 400 is provided with a discharge hole, and the movable raft plate 405 covers the hole horizontally. The guide groove 4011 of the side edge one 401 constitutes a sliding track, and the guide block 4051 on both sides of the movable raft plate 405 is nested in the sliding track. The guide block 4051 is in contact with the connecting block 4012, and the connecting block 4012 is fixed in the inner wall of the guide groove 4011 by the spring 4013. The electromagnet 4021 at the bottom of the side edge two 402 is opposite to the tail end of the movable raft plate 405, and generates a horizontal repulsive force when powered on, and becomes an attractive force when powered off.

[0043] The purpose of such design is first to achieve controlled discharge of materials. When the electromagnet 4021 is powered on, the repulsive force pushes the movable raft plate 405 to slide outward, the guide block 4051 moves along the guide groove 4011 and presses the connecting block 4012, so that the spring 4013 is compressed. At this time, the discharge hole of the bottom plate 403 is completely opened, and the materials can fall to the vibration disc 201. Secondly, the reliability of the closing action needs to be ensured. After the electromagnet 4021 is powered off, the attractive force disappears, and the spring 4013 releases the elastic force to push the connecting block 4012 to reset, and then drive the guide block 4051 and the movable raft plate 405 to move inward, until the movable raft plate 405 closes the hole and is locked by the electromagnet 4021.

[0044] The benefits of such design are as follows: first, the opening and closing response is rapid, and the dual action of electromagnetic control and mechanical reset ensures that the opening and closing of the movable raft plate 405 is accurate and timely. Second, the protection performance is improved, the plastic film 4001 below the hopper 400 physically blocks the collision and splashing of the materials falling down, reducing the cleaning demand. Third, the maintenance is convenient, the handle 4052 at the tail end of the movable raft plate 405 facilitates manual extraction for cleaning of attached oil stains or debris. Fourth, the structure has high stability, the guide groove 4011 limits the guide block 4051 to prevent the movable raft plate 405 from deviating, and the elastic reset of the spring 4013 provides shutdown redundancy. Through the dynamic balance of electromagnetic force and elastic force, the controlled switching of the opening and closing state of the material passage is realized.

[0045] The working process of the device will be described below. Figures 1 to 11 ​The working process is: starting the closed head machine 100, screw drill tail machine 200, wire through the closed head machine 100 processing, screw through the screw drill tail machine 200 processing, while the hopper 400 feeding, starting the air valve 505, because the air valve 505 and the electromagnet 4021 electrically connected, so the electromagnet 4021 charging produces the repulsion force to push away the moving raft 405, the guide block 4051 of the moving raft 405 moves outward in the guide groove 4011 of the side one 401, until the guide block 4051 contacts with the connecting block 4012, and continues to move outward under the influence of the repulsive force, and further drives the connecting block 4012 to compress the spring 4013, at this time, the moving raft 405 moves outward to make the discharge hole of the bottom plate 403 open, the screw falls downward from the discharge hole to the bottom 2013 of the vibration disc 201, when the height sensor 2012 on the disc side wall 2011 of the vibration disc 201 detects that the height of the screw on the bottom 2013 exceeds the height sensor 2012, stop the electromagnet 4021 power supply, so that the repulsive force generated by the electromagnet 4021 disappears, at this time, the spring 4013 changes from the compressed state to the stretched state, at the same time, the connecting block 4012 pushes the guide block 4051 of the moving raft 405 to move inward in the guide groove 4011 under the action of the elastic force, until the electromagnet 4021 adsorbs the moving raft 405. In this process, the branch exhaust pipe one 501 and the branch exhaust pipe two 504 always adsorb the smoke in the process of processing wire by the closed head machine 100 and drilling screw by the screw drill tail machine 200, and discharge the smoke into the collection box 503 through the air valve 505 and the connecting pipe 502.

Claims

1. A machining workshop fume automatic collection system, comprising a closed head-off machine (100), a screw tail drilling machine (200), characterized in that: Also include including support frame (300), hopper (400), main exhaust pipe (500), the closed head machine (100), screw drill tail machine (200) are arranged side by side, the support frame (300) is arranged in front of the closed head machine (100), screw drill tail machine (200), the hopper (400) is arranged on the support frame (300), the main exhaust pipe (500) is arranged on the support leg (301) of the support frame (300);The hopper (400) is provided with an electromagnet (4021), a moving raft (405), to open and close the bottom of the hopper (400), the main exhaust pipe (500) is provided with an exhaust valve (505), to suck the flue gas in the processing process.

2. An automatic fume collection system for a machine shop as defined in claim 1, wherein: The screw drill tail machine (200) includes a vibration disc (201), a height sensor (2012) is arranged on the disc side wall (2011) of the vibration disc (201), and a disc bottom (2013) is arranged below the height sensor (2012) to receive materials in the processing process.

3. A machine shop fume automatic collection system according to claim 2, wherein: The support leg (301) is arranged on the side of the support frame (300) close to the closed head machine (100) and the screw drill tail machine (200), and the support leg (301) is fixedly connected with the main exhaust pipe (500).

4. A machine shop fume automatic collection system according to claim 3, wherein: The main exhaust pipe (500) includes a first branch exhaust pipe (501) and a second branch exhaust pipe (504) respectively connected with the forming positions of the closed head machine (100) and the screw drill tail machine (200), one ends of the first branch exhaust pipe (501) and the second branch exhaust pipe (504) are connected with the main exhaust pipe (500), and the other ends of the first branch exhaust pipe (501) and the second branch exhaust pipe (504) are connected with the main exhaust pipe (500).

5. A machine shop fume automatic collection system according to claim 4 wherein: One end of the exhaust valve (505) is connected with a collecting box (503) through a connecting pipe (502), the other end of the exhaust valve (505) is connected with the main exhaust pipe (500) through the connecting pipe (502), and the main exhaust pipe (500) is electrically connected with the electromagnet (4021).

6. An automatic machining shop fume collection system according to claim 5, wherein, A plastic film (4001) is arranged below the hopper (400) to prevent materials from splashing.

7. An automatic machining shop fume collection system according to claim 6, wherein: The hopper (400) includes a side edge one (401), a side edge two (402), a bottom plate (403) and an inclined edge (404), the side edge one (401), the side edge two (402), the bottom plate (403) and the inclined edge (404) form a space for receiving materials, the bottom plate (403) is provided with a through hole for materials to pass through, and the side edge two (402) is provided with the electromagnet (4021) at the bottom.

8. An automatic machining shop fume collection system according to claim 7, characterized in that: The side edge one (401) is provided with a guide groove (4011) close to the bottom position, the guide groove (4011) is provided with a connecting block (4012) therein, the connecting block (4012) is fixedly connected with a spring (4013) on the inner side, and the other end of the spring (4013) is fixed on the wall of the guide groove (4011).

9. An automatic machining shop fume collection system according to claim 8, wherein: The hopper (400) further comprises a moving raft (405), which is a square plate, both sides of the moving raft (405) are provided with guide blocks (4051) which can move in the guide groove (4011), the cross section of the guide block (4051) is the same as that of the connecting block (4012), and the bottom plate (403) is provided with a through hole for the moving raft (405) to pass through.

10. A machine shop fume automatic collection system according to claim 9, wherein: The tail end of the moving raft (405) is provided with a handle (4052), which facilitates taking out the moving raft (405) for cleaning when the machine stops working, the electromagnet (4021) generates a repulsive force to push the moving raft (405) away from the bottom plate (403) when energized, so that the discharge through hole of the bottom plate (403) is opened, and the electromagnet (4021) absorbs the moving raft (405) when not energized.

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