A toluene cleaning system

Abstract

The present application provides a kind of toluene cleaning system, belong to ultrasonic cleaning technical field.It solves the problem that existing ultrasonic cleaning machine is difficult to be applicable to toluene to clean workpiece.The present toluene cleaning system, including cleaning tank, manipulator and shell, shell is vertically connected with partition door and is separated by partition door into loading bin and cleaning bin, cleaning tank is fixed at the bottom of shell, the front side of shell is connected with the loading door that can be opened and closed opposite loading bin, the shell is located at loading bin and is provided with blowhole, the both sides of the top of shell are rotatably connected with the reel of horizontal arrangement, the top of shell is also provided with roller shutter, both ends of roller shutter are respectively wound on two reels, manipulator vertically downward passes through roller shutter, sealing is formed between manipulator and roller shutter, toluene cleaning system also includes the air suction structure for sucking overflow shell outside gas.The present toluene cleaning system has the advantage that toluene can be used to clean workpiece.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ultrasonic cleaning, and relates to a toluene cleaning system. BACKGROUND

[0002] With the continuous development of the cleaning industry, more and more industries and enterprises use ultrasonic cleaning equipment.

[0003] For example, the applicant designs a throwing device of an ultrasonic cleaning machine and applies for a Chinese patent, the application number of which is 201520035405.9, and the publication number of which is CN204503665U. The ultrasonic cleaning machine comprises a flower basket, a base and a rack fixed on the base in the vertical direction. The upper part of the base is provided with a throwing plate for mounting the flower basket. The throwing device comprises a motor fixed on the rack and a sliding rail fixed on the rack in the vertical direction. A cam and a gear are fixed on the motor shaft of the motor. An installation sliding plate is slidably connected to the sliding rail. The throwing plate is fixed on the installation sliding plate. One end of the installation sliding plate is fixed with a roller opposite to the cam in position. The other end of the installation sliding plate is provided with a rack gear meshed with the gear. The upper end of the rack gear is provided with a spring tooth. The spring tooth can be meshed with the gear, and the cam is in contact with the roller. The throwing device of the ultrasonic cleaning machine drives the flower basket for placing workpieces to repeatedly throw up and down, so that the workpieces in the flower basket repeatedly move up and down relative to the cleaning tank, and the workpieces are cleaned more uniformly. However, a large amount of oil, dirt and some types of stains are left on the surface of some workpieces, and it is difficult to achieve the required cleaning effect by using ordinary cleaning solution.

[0004] Toluene is an organic solvent, which has strong dissolving capacity and can easily remove various oils, paints and some types of stains. However, toluene is also a volatile liquid, and when its vapor is mixed with air to reach a certain concentration, an explosive mixture is formed. The cleaning tank of the throwing device of the above-mentioned ultrasonic cleaning machine is open at the top. If toluene is poured in, toluene will be directly discharged in large quantities from the top of the cleaning tank, which has a safety hazard and cannot be used for cleaning workpieces with toluene. SUMMARY

[0005] The purpose of the present application is to solve the problem that the existing ultrasonic cleaning machine cannot be used for cleaning workpieces with toluene.

[0006] The purpose of the present application can be achieved by the following technical scheme:

[0007] The toluene cleaning system comprises a cleaning tank with an open top and a mechanical arm for grabbing workpieces, characterized in that the toluene cleaning system further comprises a housing with an opening at the top, a closable partition door is vertically connected in the housing, and the housing is divided into a loading chamber and a cleaning chamber by the partition door; the cleaning tank is fixed at the bottom of the housing and forms a seal with the housing; the housing completely covers the top of the cleaning tank and the inside of the cleaning tank is communicated with the cleaning chamber; a closable loading door is connected to the front side of the housing opposite to the loading chamber; a blowing port for communicating with a gas source is provided through the housing at the loading chamber; two horizontally arranged winding drums are rotatably connected to the top of the housing on both sides; a long curtain is provided on the top of the housing to cover the opening; the two ends of the curtain are wound around the two winding drums respectively; the mechanical arm comprises a mechanical arm vertically downward through the curtain and a driving structure capable of driving the mechanical arm to translate and lift; a seal is formed between the mechanical arm and the curtain; and the toluene cleaning system further comprises an air suction structure for sucking the gas overflowing out of the housing.

[0008] In the toluene cleaning system, when cleaning workpieces, toluene solution is arranged in the cleaning tank, the partition door is opened, the mechanical arm is translated to the loading chamber, the partition door is closed, the gas source blows gas into the loading chamber through the blowing port, and the toluene concentration in the loading chamber is reduced. Here, the gas can be an inert gas, such as nitrogen. Then, the loading door is opened, the workpieces are placed at the lower end of the mechanical arm, the mechanical arm grabs the workpieces, and the loading door is closed. The partition door is opened, the mechanical arm is translated, and the workpieces are moved into the cleaning chamber. During the movement, the curtain is synchronously translated to keep covering the opening. After the mechanical arm is translated to the cleaning chamber, the workpieces are lowered into the cleaning tank for ultrasonic cleaning. After cleaning, the mechanical arm is reversely moved to the loading chamber, the gas source blows gas into the loading chamber through the blowing port, the toluene concentration in the loading chamber is reduced, the loading door is opened, and the workpieces are taken out. During the cleaning process, the air suction structure always works to suck the small amount of gaseous toluene leaking through the gap between the loading door and the curtain for separate treatment or reuse.

[0009] In the toluene cleaning system, the blowing port is arranged in the loading chamber, the loading chamber is purged when the workpieces are put in and taken out, the toluene concentration is reduced, and toluene leakage is reduced. The cooperation of the curtain and the winding drum can minimize the leakage of toluene from the top of the housing while ensuring the movement of the mechanical arm for feeding, so that the toluene cleaning system can use toluene solution to clean workpieces, and the cleaning effect is better.

[0010] In the above-described toluene cleaning system, the top of the shell is fixed with an annular air seal pipe, which is arranged around the opening, and a plurality of gas outlets are formed on the opposite sides of the air seal pipe, and the plurality of gas outlets are distributed in the horizontal direction, and the rear side of the air seal pipe is fixed with an air inlet pipe. When cleaning the workpiece, inert gas such as nitrogen can be blown from the air inlet pipe into the air seal pipe, and gas is discharged from the gas outlets on the opposite sides of the air seal pipe, forming a structure similar to a gas curtain on the upper side of the opening of the shell. The multiple blockages are achieved by cooperating with the roller blind, further improving the blocking effect of toluene, reducing or even avoiding the volatilization and emission of toluene, while meeting the cleaning effect of toluene cleaning workpiece and ensuring safety.

[0011] In the above-described toluene cleaning system, the top of the shell is fixed with an annular air seal pipe, which is arranged around the opening, and a plurality of gas outlets are formed on the opposite sides of the air seal pipe, and the plurality of gas outlets are distributed in the horizontal direction, and the rear side of the air seal pipe is fixed with an air inlet pipe. When cleaning the workpiece, inert gas such as nitrogen can be blown from the air inlet pipe into the air seal pipe, and gas is discharged from the gas outlets on the opposite sides of the air seal pipe, forming a structure similar to a gas curtain on the upper side of the opening of the shell. The multiple blockages are achieved by cooperating with the roller blind, further improving the blocking effect of toluene, reducing or even avoiding the volatilization and emission of toluene, while meeting the cleaning effect of toluene cleaning workpiece and ensuring safety.

[0012] As another case, in the above-described toluene cleaning system, the two sides of the opening of the shell are recessed to form long strip-shaped sockets, and the two sides of the roller blind respectively correspond to the two sockets. The sockets formed on the two sides of the opening at the top of the shell not only provide support for the roller blind and ensure the flatness of the roller blind, but also further ensure the blocking of toluene. Furthermore, the gap between the edge of the roller blind and the side wall of the opening becomes U-shaped, which prolongs the path length and increases the difficulty of toluene overflow.

[0013] In the above-described toluene cleaning system, a sealing cylinder is arranged between the roller blind and the mechanical arm, the outer side of the sealing cylinder is fixed with the roller blind and forms a seal, and the mechanical arm is arranged in the sealing cylinder and the inner wall of the sealing cylinder abuts against the outer wall of the mechanical arm. The sealing cylinder can be made of Teflon, which has good sealing properties. It can not only avoid the case that the mechanical arm directly moves relative to the sheet-shaped roller blind and causes large wear, but also ensure the air tightness between the mechanical arm and the sealing cylinder.

[0014] In the above-described toluene cleaning system, the bottom of the cleaning bin is horizontally provided with a long liquid guide groove, a rod-shaped liquid guide rod is provided in the shell along the front-rear direction, the front end of the liquid guide rod is fixed with the liquid guide groove and can drive the liquid guide groove to move forward and backward, a liquid receiving groove is arranged at the sidewall of the bottom of the cleaning bin and the position of the liquid receiving groove is lower than that of the liquid guide groove, and the end of the liquid guide groove facing the liquid receiving groove is open. According to needs, the waste liquid dripping from the workpiece can be collected by pushing the liquid guide groove forward by the liquid guide rod before or after cleaning, and the waste liquid flows to the liquid receiving groove through the open end of the liquid guide groove for separate storage and treatment; at other times, the liquid guide rod can drive the liquid guide groove to move backward to make room for the workpiece to enter the cleaning tank.

[0015] In the above-described toluene cleaning system, the partition door comprises a vertically arranged U-shaped plate-shaped partition plate and a vertically arranged plate-shaped movable door, the open end of the partition plate is fixed upward in the shell, and the upper end of the partition plate is arranged adjacent to the roller shutter, a rotating shaft is vertically arranged in the shell and the upper end of the rotating shaft penetrates the top of the shell, the top of the shell is connected with an opening and closing cylinder capable of driving the rotating shaft to rotate circumferentially, a horizontally arranged long strip-shaped swing arm is fixed on the rotating shaft, and the end of the swing arm away from the rotating shaft can act on the movable door to make the movable door tightly abut against the partition plate or move away from the partition plate. When opening the door, the opening and closing cylinder drives the rotating shaft to rotate, the movable door is driven by the swing arm to move away from the partition plate, so that the central position of the partition plate is communicated with the loading bin and the cleaning bin, and vice versa, when closing the door, the opening and closing cylinder drives the rotating shaft to rotate reversely, the movable door is driven by the swing arm to move close to the partition plate and tightly abut against the partition plate, thereby blocking the loading bin and the cleaning bin. The open end of the U-shaped partition plate faces upward to make room for the mechanical arm to pass through the partition door, thereby ensuring the stability of workpiece conveying.

[0016] In the above-described toluene cleaning system, the rotating shaft, the swing arm and the movable door are arranged on the side of the partition plate facing the cleaning bin, a horizontally arranged rod-shaped transmission rod is vertically fixed on the side of the movable door facing the cleaning bin, and the transmission rod penetrates the swing arm and is axially fixed with the swing arm. The movable door is fixed relative to the rotating shaft through the transmission rod and the swing arm shaft, and will not fall off or swing and can perform opening and closing actions under the rotation of the rotating shaft; when the rotating shaft rotates, the swing arm swings, and then the transmission rod acts on the movable door to drive the movable door. Here, the transmission rod and the swing arm are used in cooperation, so that the circumferential rotation of the rotating shaft can act on the movable door through the transmission rod, the force is more uniform, and the sealing effect of the movable door and the partition plate when abutting and sealing is better.

[0017] Compared with the prior art, the toluene cleaning system sets the blowing port in the loading chamber, blows the loading chamber when the workpiece is fed in and out, reduces the toluene concentration, reduces the toluene leakage, and the cooperation of the roller shutter and the winding drum can reduce the toluene leakage from the top of the shell to the greatest extent on the basis of ensuring that the mechanical arm can move the feeding, so that the toluene cleaning system can select toluene solution to clean the workpiece, and the cleaning effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the toluene cleaning system.

[0019] Figure 2 is a sectional structural schematic diagram of the toluene cleaning system.

[0020] Figure 3 is a structural schematic diagram of the partition door in the toluene cleaning system.

[0021] Figure 4 is a local enlarged view of the liquid guide groove in the toluene cleaning system.

[0022] Figure 5 is a sectional structural schematic diagram of the sealing cylinder in the toluene cleaning system.

[0023] In the drawings, 1 is a cleaning tank, 2 is a mechanical hand, 2a is a mechanical arm, 2b is a driving structure, 3 is a shell, 3a is a loading chamber, 3b is a cleaning chamber, 3c is a loading door, 3d is a blowing port, 3e is a top plate, 3f is a fixing frame, 3g is a socket, 4 is a partition door, 4a is a partition plate, 4b is a movable door, 4c is a rotating shaft, 4d is an opening and closing cylinder, 4e is a swing arm, 4f is a transmission rod, 5 is a winding drum, 6 is a roller shutter, 7 is a gas seal pipe, 7a is an air outlet, 7b is an air inlet pipe, 8 is a liquid guide groove, 9 is a liquid receiving groove, 10 is a workpiece, 11 is a sealing cylinder, and 12 is a liquid guide rod. DETAILED DESCRIPTION

[0024] The following is a specific embodiment of the present application and further describes the technical solution of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0025] Embodiment One

[0026] As Figure 1 and Figure 2As shown, the methylbenzene cleaning system is used to be arranged in a closed cleaning chamber, including a top-open cleaning tank 1, a shell 3 arranged on the upper side of the cleaning tank 1, and a mechanical hand 2 used to grab the workpiece 10. The shell 3 is vertically connected with an openable and closable partition door 4, and the shell 3 is divided into a loading compartment 3a and a cleaning compartment 3b by the partition door 4. In this embodiment, two vertically arranged partition doors 4 are connected in the shell 3, which divides the shell 3 from left to right into the loading compartment 3a and two cleaning compartments 3b. The number of the cleaning tank 1 is two, which is sealingly fixed below the two cleaning compartments 3b. The shell 3 completely covers the top of the two cleaning tanks 1. The two cleaning tanks 1 are connected with the two cleaning compartments 3b. The structures of the two cleaning compartments 3b and the cleaning tank 1 and the two partition doors 4 are the same. The purpose of designing two is to make the workpiece 10 first coarsely cleaned in the left cleaning tank 1 and then finely cleaned in the right cleaning tank 1. The two cleaning tanks 1 contain methylbenzene solution. The side of the cleaning tank 1 is fixed with an ultrasonic transducer, which is used to clean the workpiece 10 immersed in the methylbenzene solution by ultrasonic waves.

[0027] The loading door 3c is hinged on the shell 3 on the left side by a hinge, and whether the loading compartment 3a is communicated with the outside is controlled by opening and closing the loading door 3c. The sidewall close to the bottom of the loading compartment 3a is penetrated to form a gas blowing port 3d for connecting to a nitrogen gas source. Whether the loading compartment 3a is blown and the blowing time are controlled by a valve on the connecting pipeline between the gas blowing port 3d and the nitrogen gas source. If necessary, multiple gas blowing ports 3d can be arranged to enhance the effect of blowing.

[0028] As Figure 3As shown, the partition door 4 includes a vertically arranged U-shaped partition 4a and a vertically arranged plate-shaped movable door 4b. The partition 4a is fixed inside the housing 3 with its open end facing upwards. A rotating shaft 4c is vertically arranged inside the housing 3, with its upper end extending through the top of the housing 3. An opening and closing cylinder 4d that can drive the rotating shaft 4c to rotate circumferentially is connected to the top of the housing 3. A long, narrow swing arm 4e is horizontally arranged between the rotating shaft 4c and the movable door 4b. One end of the swing arm 4e is fixed to the rotating shaft 4c, and the other end can drive the movable door 4b to swing around the rotating shaft 4c. In this embodiment, the rotating shaft 4c, the swing arm 4e, and the movable door 4b are all located on the side of the partition 4a facing the cleaning chamber 3b. A horizontally arranged, round rod-shaped transmission rod 4f is vertically fixed on the side of the movable door 4b facing the cleaning chamber 3b. The transmission rod 4f passes vertically through the other end of the swing arm 4e and is axially fixed to the swing arm 4e. There are several swing arms 4e and several transmission rods 4f, which are evenly distributed along the vertical direction. Several swing arms 4e and transmission rods 4f are connected one-to-one. One end of the cylinder body of the opening and closing cylinder 4d is hinged to the top of the housing 3 and can swing horizontally relative to the housing 3. The upper end of the rotating shaft 4c is fixed to one end of a horizontally arranged connecting rod. The outer end of the piston rod of the opening and closing cylinder 4d is hinged to the other end of the connecting rod. A sealing gasket made of rubber material is fixed on the side of the movable door 4b facing the partition 4a, and the sealing gasket can tightly abut against the partition 4a to form a seal.

[0029] like Figure 4 As shown, a long, narrow liquid guiding channel 8 is horizontally arranged at the bottom of the cleaning chamber 3b, with its length direction running left to right. A rod-shaped liquid guiding rod 12 passes through the shell 3 along the front-back direction. The front end of the liquid guiding rod 12 is fixed to the liquid guiding channel 8, and the rear end extends out of the shell 3 and is fixed to the piston rod of a cylinder. This cylinder can drive the liquid guiding channel 8 to move back and forth through the liquid guiding rod 12, either moving forward to directly below the workpiece 10 or retracting to a position close to the rear wall of the cleaning chamber 3b. A liquid receiving channel 9 is provided on the left side wall at the bottom of the cleaning chamber 3b, and the position of the liquid receiving channel 9 is lower than that of the liquid guiding channel 8. The end of the liquid guiding channel 8 facing the liquid receiving channel 9, i.e., the left end, is open, and the left end of the liquid guiding channel 8 is positioned close to the liquid receiving channel 9.

[0030] Flat top plates 3e are horizontally fixed to the left and right sides of the top of the housing 3. The two top plates 3e are at the same height and are both lower than the top surface of the housing 3. The left side and front and rear sides of the left top plate 3e are fixed to the housing 3 and form a seal. The right side of the left top plate 3e, the left side of the right top plate 3e, and the front and rear inner walls of the top of the housing 3 together form an elongated opening. Fixing brackets 3f are fixed to the upper side of the two top plates 3e. Horizontally arranged cylindrical rods are fixed to the two fixing brackets 3f near the top plates 3e. The axes of the two rods are in the front-rear direction. Cylindrical coils 5 are sleeved on the outer side of the two rods, and coil springs are provided between the coils 5 and the rods.

[0031] The opening is provided with a long piece-shaped roller shutter 6 which covers the opening, the two ends of the roller shutter 6 extend through the lower sides of the two rollers 5 and are wound on the two rollers 5, and the lower sides of the two ends of the roller shutter 6 abut against the upper sides of the corresponding top plates 3e. As shown in the figure, Figure 2 At the angle shown in the figure, the left roller 5 can rotate in the clockwise direction under the elastic force of the coil spring, thereby exerting a leftward force on the roller shutter 6, and the right roller 5 can rotate in the counterclockwise direction under the elastic force of the coil spring, thereby exerting a rightward force on the roller shutter 6. In this embodiment, straight slot-shaped sockets 3g are formed on the front and rear side walls of the opening of the shell 3, and the front and rear sides of the roller shutter 6 extend into the two sockets 3g, respectively, and the height of the socket 3g is only slightly greater than the thickness of the roller shutter 6.

[0032] A square ring-shaped air seal pipe 7 is fixed on the top surface of the shell 3, the air seal pipe 7 surrounds the opening, and a plurality of air outlets 7a are formed on the two opposite sides of the air seal pipe 7, that is, a plurality of air outlets 7a are formed on the front side of the air seal pipe 7 located at the rear, and a plurality of air outlets 7a are formed on the rear side of the air seal pipe 7 located at the front, the plurality of air outlets 7a are distributed at equal intervals in the horizontal direction, and the distribution range of the air outlets 7a in the horizontal direction is greater than the length of the opening in the left-right direction, that is, the air curtain formed by the gas blown out by the air outlets 7a covers the entire opening above, and the rear side of the air seal pipe 7 is fixed with an air inlet pipe 7b for communicating with a nitrogen gas source.

[0033] A square hole is formed in the vertical direction on the roller shutter 6, the mechanical hand 2 includes a square column-shaped mechanical arm 2a which vertically downwardly penetrates the square hole of the roller shutter 6, and a driving structure 2b which can drive the mechanical arm 2a to translate and lift, the lower end of the mechanical arm 2a is fixed with a rod-shaped gripper, and the two end bottoms of the gripper are fixed with hooks for hooking the workpiece 10. As shown in the figure, Figure 5 In this embodiment, a square cylinder-shaped sealing cylinder 11 is arranged between the roller shutter 6 and the mechanical arm 2a, the outer side of the sealing cylinder 11 is fixed with the roller shutter 6 and forms a seal, the mechanical arm 2a penetrates the sealing cylinder 11, the outer side of the mechanical arm 2a abuts against the inner wall of the sealing cylinder 11 and the mechanical arm 2a can lift relative to the sealing cylinder 11; the driving structure 2b includes a lifting cylinder, a horizontally arranged track and a translation motor, the piston rod of the lifting cylinder is arranged upwardly and is fixed with the mechanical arm 2a, thereby realizing driving the mechanical arm 2a to lift, the track is slidably arranged with a sliding table, the lifting cylinder is fixed on the sliding table, the translation motor drives the sliding table to horizontally move through the transmission structure of gear and rack or belt and pulley, thereby driving the mechanical hand 2 to translate, of course, according to the needs, the two driving components can be cylinders, hydraulic cylinders, motors, and two of them can also be arbitrarily selected to be used in combination.

[0034] When the toluene cleaning system is used to clean the workpiece 10, toluene solution is arranged in the cleaning tank 1, the partition door 4 is opened, the mechanical arm 2a moves left to the loading chamber 3a, and then the partition door 4 is closed to separate the loading chamber 3a from the cleaning chamber 3b. The valve is opened, and the nitrogen gas source is connected to the loading chamber 3a through the air blowing port 3d to blow and purge the loading chamber 3a, so as to reduce the concentration of toluene in the loading chamber 3a.

[0035] Then, the loading door 3c is opened, the workpiece 10 is sent into the loading chamber 3a by the other mechanical arm 2 or the push rod, the workpiece 10 is hooked by the hook below the mechanical arm 2a or the cleaning basket in which the workpiece 10 is placed, and then the loading door 3c is closed. The left partition door 4 is opened, the mechanical arm 2a moves right to drive the workpiece 10 into the cleaning chamber 3b, and then the left partition door 4 is closed. During the movement, the roller shutter 6 is synchronously translated to keep the opening blocked. After the mechanical arm 2a enters the cleaning chamber 3b, the workpiece 10 can be driven to move down into the cleaning tank 1 to be ultrasonically cleaned.

[0036] After the workpiece 10 is cleaned in the left cleaning tank 1, the mechanical arm 2a moves up, the right partition door 4 is opened, the mechanical arm 2a drives the workpiece 10 to move into the right cleaning chamber 3b, and the workpiece 10 is ultrasonically cleaned again in the cleaning chamber 3b.

[0037] After the cleaning is completed, the mechanical arm 2a moves left to the loading chamber 3a, the gas source blows air into the loading chamber 3a through the air blowing port 3d again to reduce the concentration of toluene in the loading chamber 3a, the loading door 3c is opened, and the workpiece 10 can be taken out.

[0038] In addition, in order to ensure the safety in use, an air suction structure such as an exhaust fan can be arranged in the cleaning chamber to suck out a small amount of toluene gas leaked from the shell 3 and treat the toluene gas separately. In order to further improve the cleaning effect of toluene on the workpiece 10, a spray pipe can be arranged in the cleaning chamber 3b to spray the workpiece 10 entering the cleaning chamber 3b first and then clean the workpiece 10.

[0039] Embodiment Two

[0040] The technical solution of the embodiment is basically the same as that of Embodiment One, and the difference lies in that the air suction structure can include a gas storage container, an air suction pipe and an air suction head, air suction components such as air are arranged at the air suction pipe, the air suction head can be divided into two parts and arranged close to the loading door 3c and the top of the shell 3 respectively, the toluene gas leaked from the shell 3 is sucked away by the air suction components, and the effect of explosion prevention is achieved.

[0041] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. A toluene cleaning system, comprising a top-open cleaning tank (1) and a robotic arm (2) for gripping workpieces (10), characterized in that, The toluene cleaning system also includes a housing (3) with an opening at the top. A vertically connected, closable partition door (4) divides the housing (3) into a loading chamber (3a) and a cleaning chamber (3b). A cleaning tank (1) is fixed to the bottom of the housing (3) and forms a seal with the housing (3). The housing (3) completely covers the top of the cleaning tank (1), and the interior of the cleaning tank (1) communicates with the cleaning chamber (3b). A closable loading door (3c) is connected to the front of the housing (3) opposite to the loading chamber (3a). An air inlet (3d) for connecting to an air source is provided through the housing (3) at the loading chamber (3a). Horizontally arranged rollers (5) are rotatably connected to both sides of the top of the housing (3). The unit is also provided with a long, flat roller blind (6) that covers the opening. The two ends of the roller blind (6) are respectively wound around the two rollers (5). The robotic arm (2) includes a robotic arm (2a) that passes vertically downward through the roller blind (6) and a drive structure (2b) that can drive the robotic arm (2a) to move horizontally and vertically. A seal is formed between the robotic arm (2a) and the roller blind (6). The toluene cleaning system also includes an air suction structure for sucking up the gas overflowing from the housing (3). The top of the housing (3) is fixed with an annular air seal pipe (7). The air seal pipe (7) is arranged around the opening. Several air outlets (7a) are opened on both sides of the air seal pipe (7). The several air outlets (7a) are distributed in the horizontal direction. An air inlet pipe (7b) is fixed on the rear side of the air seal pipe (7).

2. The toluene cleaning system according to claim 1, characterized in that, The top of the housing (3) is fixed with horizontally arranged plate-shaped top plates (3e) on both opposite sides. The upper sides of the two top plates (3e) are fixed with fixing frames (3f). The two rollers (5) are rotatably connected to the two fixing frames (3f). The two fixing frames (3f) and the corresponding rollers (5) are provided with springs that enable the rollers (5) to roll up the curtain (6). The two ends of the curtain (6) are rolled into the two rollers (5) from the lower side of the two rollers (5), and the lower sides of the two ends of the curtain (6) abut against the upper side of the top plate (3e).

3. The toluene cleaning system according to claim 2, characterized in that, The shell (3) has recesses on both sides of the opening to form long slots (3g), and the roller blind (6) extends into the two slots (3g) respectively on both sides.

4. The toluene cleaning system according to claim 1, characterized in that, A cylindrical sealing cylinder (11) is provided between the roller shutter (6) and the robotic arm (2a). The outer side of the sealing cylinder (11) is fixed to the roller shutter (6) and forms a seal. The robotic arm (2a) passes through the sealing cylinder (11) and the inner wall of the sealing cylinder (11) is in contact with the outer wall of the robotic arm (2a).

5. A toluene cleaning system according to claim 1, characterized in that, The bottom of the cleaning chamber (3b) is horizontally provided with a long strip-shaped liquid guide groove (8). A rod-shaped liquid guide rod (12) is inserted through the shell (3) along the front-back direction. The front end of the liquid guide rod (12) is fixed to the liquid guide groove (8) and can drive the liquid guide groove (8) to move back and forth. A liquid receiving groove (9) is provided on the side wall at the bottom of the cleaning chamber (3b), and the position of the liquid receiving groove (9) is lower than that of the liquid guide groove (8). The end of the liquid guide groove (8) facing the liquid receiving groove (9) is open.

6. The toluene cleaning system according to claim 1, characterized in that, The partition door (4) includes a vertically arranged U-shaped partition (4a) and a vertically arranged plate-shaped movable door (4b). The partition (4a) is fixed inside the housing (3) with its open end facing upwards, and the upper end of the partition (4a) is adjacent to the roller shutter (6). A rotating shaft (4c) is vertically arranged inside the housing (3), and the upper end of the rotating shaft (4c) extends out of the top of the housing (3). The top of the housing (3) is connected to an opening and closing cylinder (4d) that can drive the rotating shaft (4c) to rotate circumferentially. A horizontally arranged long swing arm (4e) is fixed on the rotating shaft (4c). The end of the swing arm (4e) away from the rotating shaft (4c) can act on the movable door (4b) to make the movable door (4b) tightly abut against the partition (4a) or away from the partition (4a).

7. A toluene cleaning system according to claim 6, characterized in that, The rotating shaft (4c), the swing arm (4e), and the movable door (4b) are all located on the side of the partition (4a) facing the cleaning chamber (3b). A horizontally arranged rod-shaped transmission rod (4f) is vertically fixed on the side of the movable door (4b) facing the cleaning chamber (3b). The transmission rod (4f) passes through the swing arm (4e) and is axially fixed to the swing arm (4e).

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