Suction system for general machine tools

Abstract

The present invention relates to the field of machine tools, and discloses an air suction system for a general machine tool. A plurality of air curtain machines (8) are arranged along the length direction in a slot (7), the air outlet (9) of the air curtain machine (8) is arranged downward, the total length formed by arranging the plurality of air curtain machines (8) is equal to the width of the slot (7), a pivot plate (10) is arranged on the side of the air curtain machine (8) close to the air suction port (6), the side of the pivot plate (10) away from the air curtain machine (8) is pivotally connected to the bottom of the slot (7) and the rotation plane is vertically arranged. For the air suction system for the general machine tool of the present invention, the air curtain machine (8) arranged at the slot (7) can form an invisible curtain downward, which can not only avoid the diffusion of dust to the outside without closing the moving door (5), but also avoid the generation of negative pressure in the enclosed space to reduce the discomfort of the operator. After the external air suction device extracts the dirty air in the enclosed space through the air suction port (6), the outside air can be compensated through the air curtain formed by the air curtain machine (8), further reducing the discomfort caused by the negative pressure.

Description

Technical Field

[0001] The present invention relates to the field of machine tools, and particularly to an air suction system for supporting general machine tools. Background Art

[0002] Among existing metal processing equipment, a considerable part still relies on manual operation beside the machine tool to achieve processing and cannot be replaced by numerical control. For example, a similar general machine tool is disclosed in the utility model patent with the publication number CN204997082U. On the other hand, with the enhancement of the whole society's environmental protection awareness, especially in the case where the environmental impact during processing such as polishing is more serious, generally, the operator and the machine tool are subjected to closed negative pressure treatment, that is, the operator and the machine tool are placed in a closed space, and the environment in the space is improved through an exhaust device to avoid the pollution of the surrounding environment caused by a large amount of dust generated during processing, and at the same time prevent the sand belt or tool from being blocked and causing the machine tool to stop working. However, the effect of the above solution still fails to meet the expectation, and the environment is even worse for the human body, so there is still room for improvement. Summary of the Invention

[0003] Aiming at the shortcomings of the prior art, the present invention provides an air suction system for supporting general machine tools. By placing the general machine tool in a closed space and using the air barrier generated by an air curtain machine for partition, it can not only avoid the diffusion of dust generated during processing to the surrounding, but also reduce the adverse effects of negative pressure and environmental temperature on the operator.

[0004] To solve the above technical problems, the present invention is solved through the following technical solutions:

[0005] An air suction system for supporting general machine tools includes a general machine tool. Four side plates are respectively arranged around the general machine tool, and a top plate is arranged above the four side plates. An entrance and exit is arranged on the side plate close to the processing side of the general machine tool, and movable doors are arranged on both sides of the entrance and exit. An air suction port is arranged on the side plate far from the processing side of the general machine tool to connect with an external air suction device; a slot equal in length to the entrance and exit is opened on the plate surface of the top plate on the side far from the air suction port. A plurality of air curtain machines are arranged along the length direction of the slot, and the air outlet of the air curtain machine is arranged downward. The total length formed by arranging the plurality of air curtain machines is equal to the width of the slot. A pivoting plate is arranged on the side of the air curtain machine close to the air suction port. The side of the pivoting plate far from the air curtain machine is pivotally connected to the bottom edge of the slot and the rotation plane is vertically arranged; a driving mechanism is arranged on the side plate far from the processing position of the general machine tool to drive the pivoting plate to turn up and down.

[0006] With the above - mentioned solution, the enclosing board and the top board can form a closed space around the ordinary machine tool, avoiding the dust generated during the machining process of the ordinary machine tool from spreading to the surrounding space, and enhancing the environmental protection. The entrance, exit and movable door can facilitate the operator to enter and exit the closed space. The air curtain machine installed at the slot can form an invisible curtain downward, which can not only prevent the dust from spreading to the outside without closing the movable door, but also avoid the generation of negative pressure in the closed space to reduce the discomfort of the operator. When the external air - suction device extracts the dirty air in the closed space through the air - suction port, the outside air can be compensated through the air curtain formed by the air curtain machine, further reducing the discomfort caused by the negative pressure. The pivot - connecting board can not only block the remaining part of the slot when the air curtain machine is working, but also be driven by the driving mechanism to control the air curtain machine to lift upward, facilitating the operator to close the movable door after work to ensure the safety of the equipment.

[0007] Preferably, each set of driving mechanisms includes a bracket and two cylinders. The bracket is arranged on the outer plate surface of the side plate and extends beyond the upper plate surface of the top board. The two cylinders are respectively arranged on both sides of the pivot - connecting board. The cylinder barrel of each cylinder is pivot - connected to the part of the bracket that extends beyond the top board, and the telescopic rod is pivot - connected to the upper plate surface of the pivot - connecting board.

[0008] With the above - mentioned solution, the pivot - connecting board can be turned up and down by the telescopic movement of the cylinder, thereby driving the air curtain machine to lift or lower.

[0009] Preferably, an installation board extends along the movable side edge of the pivot - connecting board. The plate surface of the installation board bends downward and is fixed to the side of the air curtain machine close to the air - suction port. A baffle board that bends downward extends along the pivot - connecting side edge of the pivot - connecting board. A number of support plates are connected between the installation board and the baffle board. The number of support plates is arranged along the length direction of the slot. The edge of each support plate close to the pivot - connecting board is fixed to the lower plate surface of the pivot - connecting board.

[0010] With the above - mentioned solution, the installation board can make it more convenient to install the air curtain machine along the movable side edge of the pivot - connecting board. The baffle board and the support plates can enhance the overall strength of the pivot - connecting board, enabling it to support the air curtain machine more stably.

[0011] Preferably, a flow splitting device is provided below the air outlet of each air curtain machine. The flow splitting device includes a front baffle located on the side of the air outlet away from the pivot plate, a rear baffle located on the side of the air outlet close to the pivot plate, and a driving device. The front baffle and the rear baffle are both as long as the length of the air outlet. The plate surface of the front baffle is arranged along the air outlet direction of the air outlet. The plate surface of the rear baffle is inclined towards the direction close to the air suction port. Side sealing plates are provided on both sides of the air outlet. A first flow splitting plate is arranged between the front baffle and the rear baffle. The plate surface of the first flow splitting plate is parallel to the plate surface of the front baffle. A second flow splitting plate vertically extends from the plate surface of the first flow splitting plate close to the rear baffle. The edge of the second flow splitting plate away from the first flow splitting plate abuts against the edge of the rear baffle close to the air suction port. The first flow splitting plate and the second flow splitting plate are both as long as the front baffle. The two ends of the connection between the first flow splitting plate and the second flow splitting plate are respectively pivotally connected to the two side sealing plates and the rotation plane is vertically arranged. On both sides and at the lower edge of the plate surface of the front baffle close to the rear baffle, blocking blocks are provided to abut against the lower edge of the first flow splitting plate. The driving device is connected to the connection between the first flow splitting plate and the second flow splitting plate to drive the two to rotate synchronously in the circumferential direction to the first limit state or the second limit state;

[0012] When in the first limit state, the plate surface of the first flow splitting plate is vertically arranged, and the edge of the second flow splitting plate close to the air suction port abuts against the lower edge of the rear baffle. When in the second limit state, the lower edge of the first flow splitting plate abuts against the side surface of the blocking block away from the front baffle. The plate surface of the second flow splitting plate is inclined towards the direction close to the air suction port and the inclination angle is greater than the inclination angle of the rear baffle;

[0013] The plate surface of the side sealing plate covers the moving areas of the first flow splitting plate and the second flow splitting plate.

[0014] With the above solution, when the air suction port is in the air suction state, the outside air will be replenished in time through the air curtain generated by the air curtain machine. At this time, if the dust content in the outside air is relatively high, the environment in the enclosed space will become worse during the air suction process. Therefore, the air curtain output from the air outlet of the air curtain machine is shunted by means of a shunting device. The shunting air curtain located on the outside is used to block the outside dust, and the shunting air curtain located on the inside is diffused and blown to the air suction port for negative pressure compensation, thereby reducing the pollution degree of the enclosed space. Specifically, an outside air outlet can be formed between the first shunting plate and the front baffle, and an inside air outlet can be formed between the second shunting plate and the rear baffle. Driven by the driving device, when the shunting device is in the first extreme state, the plate surface of the first shunting plate is vertically arranged, and the edge of the second shunting plate close to the air suction port abuts against the lower edge of the rear baffle. At this time, the air curtain machine is in the normal output state, that is, the air curtain directly discharges downward through the channel between the front baffle and the first shunting plate to form a complete barrier. When shunting is required, the shunting device is in the second extreme state through the driving device. At this time, the lower edge of the first shunting plate abuts against the side surface of the blocking block away from the front baffle, so that a shunting channel located in the front can be formed between the first shunting plate and the front baffle, and the air curtain generated by the shunting channel can be used to block the outside dust. At the same time, the second shunting plate can be opened downward along with the first shunting plate, so that the plate surface of the second shunting plate tilts towards the direction close to the air suction port and the tilt angle is greater than the tilt angle of the rear baffle, so that the channel between the second shunting plate and the rear baffle can output the air flow towards the air suction port, so that the negative pressure in the enclosed space is relieved. In addition, since the interval between the lower edge of the first shunting plate and the front baffle is reduced, the air flow velocity output from the interval can be increased, so that even if the air flow at the air outlet of the air curtain machine is divided, the blocking performance of the outside air curtain can be ensured. In this way, it can not only relieve the negative pressure condition in the enclosed space, but also prevent the outside dust from entering the enclosed space, which is more user-friendly.

[0015] Preferably, a third shunting plate extends upward from the first shunting plate; when the first shunting plate and the second shunting plate are in the first extreme state, the plate surface of the third shunting plate is vertically arranged; when the first shunting plate and the second shunting plate are in the second extreme state, the plate surface of the third shunting plate tilts towards the direction close to the rear baffle and there is an interval between the upper edge of the third shunting plate and the lower plate surface of the rear baffle.

[0016] With the above solution, when the first shunting plate and the second shunting plate are in the second extreme state, since the plate surface of the third shunting plate tilts towards the direction close to the rear baffle and there is an interval between the upper edge of the third shunting plate and the lower plate surface of the rear baffle, part of the air flow blown out by the air curtain machine can be discharged more efficiently from the channel between the first shunting plate and the front baffle under the guiding action of the third shunting plate to ensure the blocking effect of the outside air curtain.

[0017] Preferably, when the driving mechanism drives the air outlet of the air curtain machine to the downward state, the plate surface of the pivot plate is in an inclined state and the active side edge of the pivot plate is higher than the pivot side edge. The space formed between adjacent support plates is defined as a diversion groove. The plate surface of the rear baffle is provided with a plurality of air outlets corresponding to the plurality of diversion grooves along its length direction. A plurality of elastic sealing plates covering the plurality of air outlets are attached to the upper plate surface of the rear baffle. The edge of the elastic sealing plate close to the front baffle is fixed to the upper plate surface of the rear baffle by screws.

[0018] With the above solution, when the first diversion plate and the second diversion plate are in the first extreme state, the rear baffle and the second diversion plate are in a closed state, and a wedge-shaped chamber is formed. At the same time, the plate surface of the third diversion plate is vertically arranged. At this time, part of the air flow blown out by the air curtain machine will enter the wedge-shaped chamber formed by the rear baffle and the second diversion plate. Under the blocking action of the third diversion plate, the air pressure in the chamber will increase. When the air pressure increases to a certain extent, it can push open the elastic sealing plate through the air outlet. Since the plate surface of the rear baffle is inclined, the air flow discharged from the air outlet can be directed towards the corresponding diversion groove. Then, under the guiding action of the diversion groove and the baffle, the air flow can be conducted downward, which can not only sweep away the dust remaining on the pivot plate but also circulate the air in the enclosed space to improve the working environment quality.

[0019] Preferably, the driving device includes pivot shafts arranged at both ends of the connection between the first diversion plate and the second diversion plate and respectively rotatably penetrating through two side sealing plates. The pivot shafts extend beyond the outer plate surfaces of the side sealing plates, and a first driven wheel is concentrically arranged on the extending part. A driving shaft is arranged parallel to the upper side surface of the air curtain machine. Both ends of the driving shaft are rotatably connected to pivot seats fixed on the upper plane of the air curtain machine. The two ends of the driving shaft respectively extend beyond the opposite side surfaces of the pivot seats, and a second driven wheel corresponding to the two first driven wheels is concentrically arranged on each extending part. A third driven wheel concentrically connected to the driving shaft is arranged between the two pivot seats. A motor is arranged on the upper plate surface of the pivot plate, and a driving wheel corresponding to the third driven wheel is concentrically arranged on the output shaft of the motor. The driving wheel and the third driven wheel are connected by a first transmission belt, and the second driven wheel is connected to the corresponding first driven wheel by a second transmission belt.

[0020] With the above solution, the driving device can drive the first diversion plate, the second diversion plate, and the third diversion plate to perform circumferential rotation in the vertical direction between the two side sealing plates more efficiently.

[0021] Due to the adoption of the above technical solutions, the present invention has remarkable technical effects: the surrounding board and the top board can form a closed space around the ordinary machine tool, avoiding the diffusion of dust generated during the processing of the ordinary machine tool into the surrounding space, and increasing the environmental protection. The entrance and exit and the movable door can facilitate the operator to enter and exit the closed space. The air curtain machine arranged at the slot can form an invisible curtain downward, which can not only avoid the diffusion of dust to the outside without closing the movable door, but also avoid the generation of negative pressure in the closed space to reduce the discomfort of the operator. When the external air suction device extracts the dirty air in the closed space through the air suction port, the outside air can be compensated through the air curtain formed by the air curtain machine, further reducing the discomfort caused by the negative pressure. The pivot plate can not only block the remaining part of the slot when the air curtain machine is working, but also control the air curtain machine to lift upward under the drive of the driving mechanism, facilitating the operator to close the movable door after work to ensure the safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the structural schematic diagram of the first embodiment; Figure 1 ;

[0023] Figure 2 is Figure 1 the enlarged schematic diagram of part A shown in;

[0024] Figure 3 is the structural schematic diagram of the first embodiment; Figure 2 ;

[0025] Figure 4 is Figure 3 the enlarged schematic diagram of part B shown in;

[0026] Figure 5 is the structural schematic diagram of the second embodiment; Figure 1 ;

[0027] Figure 6 is the exploded view of the second embodiment;

[0028] Figure 7 is Figure 6 the enlarged schematic diagram of part C shown in;

[0029] Figure 8 is the structural schematic diagram of the second embodiment when the flow dividing device is in the first extreme state;

[0030] Figure 9 is Figure 8 the enlarged schematic diagram of part D shown in;

[0031] Figure 10 is the structural schematic diagram of the second embodiment when the flow dividing device is in the second extreme state;

[0032] Figure 11 is Figure 10Enlarged schematic diagram of part E shown

[0033] Figure 12 Structural schematic of the second embodiment Figure 2 。

[0034] The names of the parts referred to by each numerical label in the above drawings are as follows: 1, ordinary machine tool; 2, side plate; 3, top plate; 4, entrance and exit; 5, moving door; 6, air suction port; 7, slot; 8, air curtain machine; 9, air outlet; 10, pivot plate; 11, driving mechanism; 12, bracket; 13, cylinder; 14, air cylinder; 15, telescopic rod; 16, mounting plate; 17, baffle plate; 18, support plate; 19, shunt device; 20, front baffle; 21, rear baffle; 22, driving device; 23, side seal plate; 24, first shunt plate; 25, second shunt plate; 26, partition block; 27, third shunt plate; 28, diversion groove; 29, exhaust port; 30, elastic seal plate; 31, screw; 32, pivot shaft; 33, first driven wheel; 34, driving shaft; 35, pivot seat; 36, second driven wheel; 37, third driven wheel; 38, motor; 39, driving wheel; 40, first transmission belt; 41, second transmission belt; 42, hinge. Specific embodiments

[0035] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0036] Embodiment 1

[0037] As Figures 1 to 4As shown in the figure, an air suction system for a conventional machine tool disclosed in this embodiment includes a conventional machine tool 1. Four side plates 2 are respectively arranged around the conventional machine tool 1. A top plate 3 is arranged above the four side plates 2. An access opening 4 is arranged on the side plate 2 close to the machining side of the conventional machine tool 1. Moving doors 5 are arranged on both sides of the access opening 4. An air suction port 6 is arranged on the side plate 2 far from the machining side of the conventional machine tool 1 to connect an external air suction device (not shown). The external air suction device (not shown) can be a suction fan or an exhaust fan, which is common general knowledge in this field and will not be elaborated here. A slot 7 equal in length to the access opening 4 is opened on the plate surface of the top plate 3 on the side far from the air suction port 6. A plurality of air curtain machines 8 are arranged along the length direction of the slot 7. The air outlet 9 of the air curtain machine 8 is arranged downward. The total length formed by the arrangement of the plurality of air curtain machines 8 is equal to the width of the slot 7. A pivot plate 10 is arranged on the side of the air curtain machine 8 close to the air suction port 6. The side of the pivot plate 10 far from the air curtain machine 8 is pivotally connected to the bottom edge of the slot 7 through a hinge 42 and the rotation plane is vertically arranged. A driving mechanism 11 is arranged on the side plate 2 far from the machining position of the conventional machine tool 1 to drive the pivot plate 10 to flip up and down. In this embodiment, each set of driving mechanisms 11 includes a bracket 12 and two cylinders 13. The bracket 12 is arranged on the outer plate surface of the side plate 2 and extends beyond the upper plate surface of the top plate 3. The two cylinders 13 are respectively arranged on both sides of the pivot plate 10. The cylinder barrel 14 of each cylinder 13 is pivotally connected to the part of the bracket 12 extending beyond the top plate 3 through a hinge, and the telescopic rod 15 is also pivotally connected to the upper plate surface of the pivot plate 10.

[0038] To improve the stability of the connection between the air curtain machine 8 and the pivot plate 10 and at the same time increase the overall strength of the pivot plate 10, a mounting plate 16 extends along the movable side edge of the pivot plate 10. The plate surface of the mounting plate 16 is bent downward and fixed to the side of the air curtain machine 8 close to the air suction port 6 through a bolt assembly (not shown). A baffle plate 17 that bends downward extends along the pivot side edge of the pivot plate 10. A plurality of support plates 18 are connected between the mounting plate 16 and the baffle plate 17. The plurality of support plates 18 are arranged along the length direction of the slot 7. The edge of each support plate 18 close to the pivot plate 10 is fixed to the lower plate surface of the pivot plate 10.

[0039] Embodiment Two

[0040] As Figures 5 to 11As shown in the figure, on the basis of the first embodiment, a flow splitting device 19 is provided below the air outlet 9 of each air curtain machine 8. The flow splitting device 19 includes a front baffle 20 located on the side of the air outlet 9 away from the pivot plate 10, a rear baffle 21 located on the side of the air outlet 9 close to the pivot plate 10, and a driving device 22. The front baffle 20 and the rear baffle 21 are both equal in length to the length of the air outlet 9. The plate surface of the front baffle 20 is arranged along the air outlet direction of the air outlet 9, and the plate surface of the rear baffle 21 is inclined towards the direction close to the air suction port 6. Side sealing plates 23 are arranged on both sides of the air outlet 9; a first flow splitting plate 24 is arranged between the front baffle 20 and the rear baffle 21. The plate surface of the first flow splitting plate 24 is parallel to the plate surface of the front baffle 20. A second flow splitting plate 25 vertically extends from the plate surface of the first flow splitting plate 24 close to the rear baffle 21. The edge of the second flow splitting plate 25 away from the first flow splitting plate 24 abuts against the edge of the rear baffle 21 close to the air suction port 6. The first flow splitting plate 24 and the second flow splitting plate 25 are both equal in length to the front baffle 20; both ends of the connection between the first flow splitting plate 24 and the second flow splitting plate 25 are pivotally connected to the two side sealing plates 23 respectively, and the rotation plane is vertically arranged. On both sides of the plate surface of the front baffle 20 close to the rear baffle 21 and at the lower edge, blocking blocks 26 are arranged to abut against the lower edge of the first flow splitting plate 24. The driving device 22 is connected to the connection between the first flow splitting plate 24 and the second flow splitting plate 25 to drive the two to rotate synchronously in the circumferential direction to the first limit state or the second limit state.

[0041] Specifically, when in the first limit state, the plate surface of the first flow splitting plate 24 is vertically arranged, and the edge of the second flow splitting plate 25 close to the air suction port 6 abuts against the lower edge of the rear baffle 21; when in the second limit state, the lower edge of the first flow splitting plate 24 abuts against the side surface of the blocking block 26 away from the front baffle 20, and the plate surface of the second flow splitting plate 25 is inclined towards the direction close to the air suction port 6 and the inclination angle is greater than the inclination angle of the rear baffle 21. The plate surface of the side sealing plate 23 covers the moving areas of the first flow splitting plate 24 and the second flow splitting plate 25.

[0042] To enable some of the air flow output by the air curtain machine 8 to enter the channel between the front baffle 20 and the first flow splitting plate 24 more efficiently, a third flow splitting plate 27 extends upward from the first flow splitting plate 24. When the first flow splitting plate 24 and the second flow splitting plate 25 are in the first limit state, the plate surface of the third flow splitting plate 27 is vertically arranged; when the first flow splitting plate 24 and the second flow splitting plate 25 are in the second limit state, the plate surface of the third flow splitting plate 27 is inclined towards the direction close to the rear baffle 21, and there is a gap between the upper edge of the third flow splitting plate 27 and the lower plate surface of the rear baffle 21.

[0043] To clean the lower plate surface of the pivot plate 10 and simultaneously form an air circulation within the enclosed space, when the driving mechanism 11 drives the air outlet 9 of the air curtain machine 8 to the downward state, the plate surface of the pivot plate 10 is in an inclined state and the movable side edge of the pivot plate 10 is higher than the pivot side edge. The space formed between adjacent support plates 18 is defined as the diversion groove 28. The plate surface of the rear baffle 21 is provided with a plurality of air discharge ports 29 corresponding to the plurality of diversion grooves 28 along its length direction. A plurality of elastic sealing plates 30 covering the plurality of air discharge ports 29 are attached to the upper plate surface of the rear baffle 21. The elastic sealing plate 30 is preferably made of rubber and thus has better elasticity and sealing performance. The edge of the elastic sealing plate 30 close to the front baffle 20 is fixed to the upper plate surface of the rear baffle 21 by screws 31.

[0044] As Figure 6 , Figure 7 and Figure 12 shown, to improve the driving efficiency of the driving device 22, the driving device 22 includes pivot shafts 32 disposed at both ends of the junction of the first diversion plate 24 and the second diversion plate 25 and respectively rotatably passing through the two side sealing plates 23. The pivot shafts 32 extend beyond the outer plate surfaces of the side sealing plates 23 and a first driven wheel 33 is concentrically provided on the extending part. A driving shaft 34 is parallelly disposed on the upper side surface of the air curtain machine 8. Both ends of the driving shaft 34 are rotatably connected to pivot seats 35 fixed on the upper plane of the air curtain machine 8. The two ends of the driving shaft 34 respectively extend beyond the opposite side surfaces of the pivot seats 35 and two second driven wheels 36 corresponding to the two first driven wheels 33 are concentrically provided on the extending parts. A third driven wheel 37 concentrically connected to the driving shaft 34 is disposed between the two pivot seats 35. An electric motor 38 is provided on the upper plate surface of the pivot plate 10. A driving wheel 39 corresponding to the third driven wheel 37 is concentrically provided on the output shaft of the electric motor 38. The driving wheel 39 and the third driven wheel 37 are connected by a first transmission belt 40. The second driven wheels 36 are connected to the corresponding first driven wheels 33 by second transmission belts 41.

[0045] Now, the working principle of the suction system for a general machine tool will be elaborated in combination with Embodiment 1 and Embodiment 2:

[0046] When the general machine tool 1 is working, on the premise of opening the movable door 5, the pivot plate 10 is moved downward by the air cylinder 13 so that the air outlet 9 of the air curtain machine 8 faces downward. At this time, when the air curtain machine 8 is started, an invisible curtain can be formed on the processing side of the general lathe, which can not only block dust but also enable the outside air to compensate the enclosed space around the general machine tool 1 through the air curtain to improve the negative pressure problem caused by the suction of the suction port 6.

[0047] When the operator needs to leave, the pivot plate 10 together with the air curtain machine 8 can be lifted by retracting the air cylinder 13 first, and then the movable door 5 can be closed.

[0048] When the air curtain machine 8 is in the working state, if there is no need for exhaust operation, the diversion device 19 can be driven to the first limit state by means of the driving device 22, that is, the plate surfaces of the first diversion plate 24 and the third diversion plate 27 are both in the vertical state. At the same time, the second diversion plate 25 and the inclined rear baffle 21 are in the closed state to form a wedge-shaped closed space. In this state, the air flow blown out from the air outlet 9 of the air curtain machine 8 directly passes through the channel between the first air blocking plate and the front baffle 20 to form an air curtain to prevent the dust in the closed space from spreading outwards. At the same time, due to the increase in the air pressure in the wedge-shaped closed space, when the air pressure increases to a certain extent, it can push open the elastic sealing plate 30 through the air outlet 29. Since the plate surface of the rear baffle 21 is inclined, the air flow discharged from the air outlet 29 can be directed towards the corresponding diversion groove 28, and then under the guiding action of the diversion groove 28 and the baffle 17, the air flow can be conducted downward, which can not only sweep away the dust remaining on the pivot plate 10, but also circulate the air in the closed space to improve the working environment quality.

[0049] When exhaust is required, start an external air suction device (not shown). The external air suction device (not shown) extracts the air in the closed space through the air suction port 6 to make the closed space form a negative pressure. In order to prevent external dust or impurities from being sucked into the closed space through the air curtain, the diversion device 19 is switched to the second limit state by means of the driving device 22, that is, the lower edge of the first diversion plate 24 abuts against the blocking block 26 so that the lower edge of the first diversion plate 24 can form a narrow channel with the front baffle 20, and the third diversion plate 27 inclines towards the rear baffle 21 and there is an air flow channel between the upper edge of the third diversion plate 27 and the plate surface of the rear baffle 21. At the same time, the second diversion plate 25 is opened downward so that the rear baffle 21 and the second diversion plate 25 form an exhaust channel pointing to the air suction port 6. In this state, the air flow output from the air outlet 9 of the air curtain machine 8 is separated by the third diversion plate 27. Part of the air flow enters the channel between the first diversion plate 24 and the front baffle 20 along the guiding surface formed by the inclination of the third diversion plate 27 and forms an outer air curtain through this channel to block external dust or impurities from entering the closed space. At the same time, the other part of the air flow can be discharged along the channel between the rear baffle 21 and the second diversion plate 25 to serve as the compensation air flow for the air suction port 6. In the above process, the control of the cylinder 13 and the motor 38 in the driving device 22 can be realized by means of the built-in program of the PLC or the single-chip microcomputer, or the same function can be realized through an equivalent analog circuit, which belongs to the common knowledge in the field and will not be elaborated here.

Claims

1. An air suction system for a conventional machine tool, comprising a conventional machine tool (1), characterized in that: Four side plates (2) are respectively arranged around the general machine tool (1), a top plate (3) is arranged above the four side plates (2), an entrance and exit (4) is arranged on the side plate (2) close to the machining side of the general machine tool (1), moving doors (5) are arranged on both sides of the entrance and exit (4), and an air suction port (6) is arranged on the side plate (2) far from the machining side of the general machine tool (1) to connect an external air suction device; a slot (7) equal in length to the entrance and exit (4) is formed in the plate surface of the top plate (3) on the side far from the air suction port (6), a plurality of air curtain machines (8) are arranged in the slot (7) along its length direction, the air outlet (9) of the air curtain machine (8) is arranged downward, the total length formed by arranging the plurality of air curtain machines (8) is equal to the width of the slot (7), a pivot plate (10) is arranged on the side of the air curtain machine (8) close to the air suction port (6), and the side of the pivot plate (10) far from the air curtain machine (8) is pivotally connected to the bottom edge of the slot (7) and the rotation plane is vertically arranged; a driving mechanism (11) is arranged on the side plate (2) far from the machining position of the general machine tool (1) to drive the pivot plate (10) to turn up and down; Each set of driving mechanisms (11) includes a bracket (12) and two cylinders (13), the bracket (12) is arranged on the outer plate surface of the side plate (2) and extends beyond the upper plate surface of the top plate (3), the two cylinders (13) are respectively arranged on both sides of the pivot plate (10), and the telescopic rod (15) is pivotally connected to the upper plate surface of the pivot plate (10).

2. The suction system for a general machine tool according to claim 1, characterized in that: An installation plate (16) extends along the movable side edge of the pivot plate (10), the plate surface of the installation plate (16) is bent downward and fixed to the side of the air curtain machine (8) close to the air suction port (6), a baffle plate (17) bent downward extends along the pivot side edge of the pivot plate (10), a plurality of support plates (18) are connected between the installation plate (16) and the baffle plate (17), the plurality of support plates (18) are arranged along the length direction of the slot (7), and the edge of each support plate (18) close to the pivot plate (10) is fixed to the lower plate surface of the pivot plate (10).

3. The suction system for general machine tools according to claim 2, characterized in that: Below the air outlet (9) of each air curtain machine (8), a flow splitting device (19) is provided. The flow splitting device (19) includes a front baffle (20) located on the side of the air outlet (9) away from the pivot plate (10), a rear baffle (21) located on the side of the air outlet (9) close to the pivot plate (10), and a driving device (22). The front baffle (20) and the rear baffle (21) are both equal in length to the length of the air outlet (9). The plate surface of the front baffle (20) is arranged along the air outlet direction of the air outlet (9), and the plate surface of the rear baffle (21) is inclined towards the direction close to the air suction port (6). Side seal plates (23) are provided on both sides of the air outlet (9); A first flow splitting plate (24) is arranged between the front baffle (20) and the rear baffle (21). The plate surface of the first flow splitting plate (24) is parallel to the plate surface of the front baffle (20). A second flow splitting plate (25) vertically extends from the plate surface of the first flow splitting plate (24) close to the rear baffle (21). The edge of the second flow splitting plate (25) away from the first flow splitting plate (24) abuts against the edge of the rear baffle (21) close to the air suction port (6). The first flow splitting plate (24) and the second flow splitting plate (25) are both equal in length to the front baffle (20); Both ends of the connection between the first flow splitting plate (24) and the second flow splitting plate (25) are pivotally connected to the two side seal plates (23) and the rotation plane is vertically arranged. On both sides and at the lower edge of the plate surface of the front baffle (20) close to the rear baffle (21), blocking blocks (26) are provided to abut against the lower edge of the first flow splitting plate (24). The driving device (22) is connected to the connection of the first flow splitting plate (24) and the second flow splitting plate (25) to drive the two to synchronously rotate circumferentially to the first limit state or the second limit state; When in the first limit state, the plate surface of the first flow splitting plate (24) is vertically arranged, and the edge of the second flow splitting plate (25) close to the air suction port (6) abuts against the lower edge of the rear baffle (21); When in the second limit state, the lower edge of the first flow splitting plate (24) abuts against the side surface of the blocking block (26) away from the front baffle (20), and the plate surface of the second flow splitting plate (25) is inclined towards the direction close to the air suction port (6) and the inclination angle is greater than the inclination angle of the rear baffle (21); The plate surface of the side seal plate (23) covers the activity areas of the first flow splitting plate (24) and the second flow splitting plate (25).

4. The air suction system for a conventional machine tool according to claim 3, characterized in that: The first flow splitting plate (24) extends upward to form a third flow splitting plate (27); When the first flow splitting plate (24) and the second flow splitting plate (25) are in the first limit state, the plate surface of the third flow splitting plate (27) is vertically arranged; When the first flow splitting plate (24) and the second flow splitting plate (25) are in the second limit state, the plate surface of the third flow splitting plate (27) is inclined towards the direction close to the rear baffle (21) and there is a gap between the upper edge of the third flow splitting plate (27) and the lower plate surface of the rear baffle (21).

5. The suction air system for a conventional machine tool according to claim 4, characterized in that: When the driving mechanism (11) drives the air outlet (9) of the air curtain machine (8) to the downward state, the plate surface of the pivot plate (10) is in an inclined state and the active side edge of the pivot plate (10) is higher than the pivot side edge. The space formed between adjacent support plates (18) is defined as the diversion groove (28). The plate surface of the rear baffle (21) is provided with a plurality of air outlets (29) corresponding to the plurality of diversion grooves (28) along its length direction. A plurality of elastic sealing plates (30) covering the plurality of air outlets (29) are attached to the upper plate surface of the rear baffle (21). The edge of the elastic sealing plate (30) close to the front baffle (20) is fixed to the upper plate surface of the rear baffle (21) by screws (31).

6. The suction system for a general machine tool according to claim 3, characterized in that: The driving device (22) includes pivot shafts (32) arranged at both ends of the connection between the first flow dividing plate (24) and the second flow dividing plate (25) and respectively rotatably penetrating through the two side sealing plates (23). The pivot shafts (32) extend beyond the outer plate surfaces of the side sealing plates (23), and a first driven wheel (33) is concentrically arranged on the extended part. A driving shaft (34) is arranged in parallel on the upper side surface of the air curtain machine (8). Both ends of the driving shaft (34) are rotatably connected to pivot seats (35) fixed on the upper plane of the air curtain machine (8). The two ends of the driving shaft (34) respectively extend beyond the opposite side surfaces of the pivot seats (35), and two second driven wheels (36) corresponding to the two first driven wheels (33) are concentrically arranged on the extended parts. A third driven wheel (37) concentrically connected to the driving shaft (34) is arranged between the two pivot seats (35). A motor (38) is arranged on the upper plate surface of the pivot plate (10). A driving wheel (39) corresponding to the third driven wheel (37) is concentrically arranged on the output shaft of the motor (38). The driving wheel (39) and the third driven wheel (37) are connected by a first transmission belt (40). The second driven wheel (36) is connected to the corresponding first driven wheel (33) by a second transmission belt (41).

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