Exhaust gas collection and treatment device and workpiece cleaning system

Abstract

The present invention provides an exhaust gas collection and treatment device and a workpiece cleaning system. The exhaust gas collection and treatment device includes: a receiving tank (1; 7) configured to receive a cleaning liquid, a blowing port (3) is provided on a first side wall of the receiving tank (1; 7), a suction port (6) is provided on a second side wall, the first side wall and the second side wall are oppositely arranged, and both the blowing port (3) and the suction port (6) are higher than the height of the cleaning liquid; and a blowing component (10) and a suction component (21), which are respectively communicated with the blowing port (3) and the suction port (6), and form an air curtain layer (4) in the area between the blowing port (3) and the suction port (6) in the receiving tank (1; 7) when both are opened. This device can prevent the exhaust gas in the tank from escaping, can achieve environmental protection treatment of the exhaust gas, and improve the automatic cleaning efficiency; moreover, it provides a pollution-free and safe operation environment for the operator.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and particularly to a waste gas collection and treatment device and a workpiece cleaning system. Background Art

[0002] The paint, oil stain and rust on the surface of construction machinery parts need to go through process steps such as high-temperature cleaning, residue rinsing, ultrasonic rust removal, residual liquid rinsing, and fine cleaning in sequence to ensure the surface quality of the parts and meet different production requirements such as processing, painting, and assembly. Among them, how to safely, efficiently, and environmentally collect and treat waste gas is the key to the cleaning process.

[0003] After high-temperature cleaning, the workpiece needs to be rinsed to remove the residues on the surface. Since the workpiece is at a high temperature, a large amount of high-temperature water vapor will be generated instantly when the workpiece is put into the rinsing tank. On the one hand, there is a risk of scalding the operator, and on the other hand, it will accelerate the corrosion of equipment such as the workshop overhead crane transportation mechanism, posing a safety hazard.

[0004] After rinsing, the workpiece needs to go through the ultrasonic rust removal process to remove surface defects such as oxide scales and rust. However, most of the existing ultrasonic rust removal cleaning fluids are acidic media. Since there is no suitable protection and collection device during the cleaning process, acid mist is likely to diffuse, causing environmental pollution, affecting the health of operators and the reliability of equipment, being unfavorable for safe operation, and the acid mist treatment process is complex and the equipment cost is high.

[0005] Therefore, it is necessary to develop a safe, efficient, and environmentally friendly high-temperature cleaning waste gas collection and treatment device. Summary of the Invention

[0006] Embodiments of the present invention provide a waste gas collection and treatment device and a workpiece cleaning system, which can efficiently and environmentally collect waste gas.

[0007] On the one hand, the present invention provides a waste gas collection and treatment device, including:

[0008] A receiving tank configured to receive a cleaning liquid. A blowing port is provided on a first side wall of the receiving tank, and a suction port is provided on a second side wall. The first side wall and the second side wall are oppositely arranged, and both the blowing port and the suction port are higher than the height of the cleaning liquid; and

[0009] A blowing component and a suction component, which are respectively communicated with the blowing port and the suction port, and form an air curtain layer in the area between the blowing port and the suction port in the receiving tank when both are opened.

[0010] In some embodiments, the receiving tank includes a tank body and a tank cover. An opening for placing a workpiece to be cleaned is provided at the top of the tank body. The tank cover is arranged relative to the tank body to be openable or closable, and closes the opening in the closed state.

[0011] In some embodiments, the height of the air blowing port is not higher than that of the air suction port.

[0012] In some embodiments, the air blowing port is higher than the liquid level by a preset distance.

[0013] In some embodiments, the waste gas collection and treatment device further includes an air suction pipe connected between the air suction port and the air suction component. The pipe section of the air suction pipe close to the air suction port slopes downward from the end close to the air suction component to the end connected to the air suction port.

[0014] In some embodiments, the waste gas collection and treatment device further includes an air supply pipe and an air volume regulating valve. The air blowing component includes a blower. The two ends of the air supply pipe are respectively communicated with the outlet of the blower and the air blowing port, and the air volume regulating valve is arranged on the air supply pipe; or

[0015] The waste gas collection and treatment device further includes an air suction pipe and an air volume regulating valve. The air suction component includes an induced draft fan. The two ends of the air suction pipe are respectively communicated with the air blowing port and the inlet of the induced draft fan, and the air volume regulating valve is arranged on the air suction pipe.

[0016] In some embodiments, the receiving groove is provided with an installation hole extending in the height direction. The top of the installation hole is at the same height as the air suction port, and the bottom of the installation hole is lower than the air suction port.

[0017] The waste gas collection and treatment device further includes: an air outlet adjusting member. The air blowing port is arranged inside the air outlet adjusting member. The air outlet adjusting member is movably arranged in the air blowing port in the height direction and the pitching angle is adjustable. The air outlet adjusting member and the air blowing port are closed by a connecting piece, and the connecting piece can be folded or unfolded in the height direction.

[0018] In some embodiments, a plurality of installation holes are arranged at intervals in the height direction on the receiving groove. The topmost installation hole is at the same height as the air suction port, and the remaining installation holes are all lower than the air suction port.

[0019] The air blowing component further includes: an air outlet adjusting member. The air blowing port is arranged inside the air outlet adjusting member. The air outlet adjusting member can be selectively installed in one of the installation holes, and the remaining installation holes are closed.

[0020] In some embodiments, the waste gas collection and treatment device further includes:

[0021] A dissolving tank configured to hold liquid;

[0022] An aeration disc arranged in the bottom area of the dissolving tank, and a plurality of aeration heads are arranged on the aeration disc;

[0023] A connecting pipe, the first end of which is communicated with the outlet of the air suction component, and the second end of which is communicated with the aeration disc from the bottom of the dissolving tank; and

[0024] A reflux pipe, the first end of which is communicated with the dissolving tank, and the second end of which is communicated with the receiving groove, and the communicating part is between the air suction port and the liquid level of the cleaning liquid in the height direction.

[0025] In some embodiments, the exhaust gas collection and treatment device further includes:

[0026] a temperature sensor for detecting the temperature of the liquid in the dissolution tank; and

[0027] a pump provided on the reflux pipe and configured to be turned on when the detected value of the temperature sensor is higher than a preset temperature.

[0028] In some embodiments, there are at least two accommodation tanks, the blowing component is communicated with the blowing ports of each accommodation tank, and the suction component is communicated with the suction ports of each accommodation tank.

[0029] In some embodiments, there are two accommodation tanks, including a first accommodation tank and a second accommodation tank. The first accommodation tank is configured to perform high-temperature rinsing on the workpiece to be cleaned, and the second accommodation tank is configured to remove rust from the workpiece to be cleaned;

[0030] The exhaust gas collection and treatment device further includes a suction pipe, and the suction pipe includes: a main suction pipe and two suction branch pipes. The first ends of the two suction branch pipes are respectively communicated with the suction ports of the first accommodation tank and the second accommodation tank, the first end of the main suction pipe is communicated with the second ends of the two suction branch pipes, and the second end of the main suction pipe is communicated with the inlet of the suction component.

[0031] In some embodiments, both of the two suction branch pipes are inclined downward from the second end to the first end.

[0032] In some embodiments, a plurality of partition plates are provided in the main suction pipe. The first ends of the partition plates are connected to the inner wall of the main suction pipe, and the second ends are free ends. Each partition plate is arranged staggeredly along the extending direction of the main suction pipe.

[0033] In some embodiments, the partition plates are inclined from the first end to the second end towards the downstream of the air flow.

[0034] In some embodiments, the exhaust gas collection and treatment device further includes:

[0035] a dissolution tank configured to accommodate liquid;

[0036] a connecting pipe, the first end of which is communicated with the outlet of the induced draft fan, and the second end of which is communicated with the bottom area of the dissolution tank; and

[0037] a reflux pipe, the first end of which is communicated with the dissolution tank, and the second end of which is communicated with the first accommodation tank or the second accommodation tank, and the communicating part is between the suction port and the liquid level of the cleaning liquid in the height direction.

[0038] In some embodiments, the first accommodation tank is configured to accommodate a neutral cleaning liquid, the second accommodation tank is configured to accommodate an acidic cleaning liquid, the suction branch pipe connected to the first accommodation tank is located above the suction branch pipe connected to the second accommodation tank, and the second end of the reflux pipe is communicated with the suction port of the second accommodation tank; or

[0039] The first receiving tank is configured to receive an alkaline cleaning solution, the second receiving tank is configured to receive an acidic cleaning solution, the suction branch pipe connected to the first receiving tank is located below the suction branch pipe connected to the second receiving tank, and the second end of the reflux pipe communicates with the suction port of the first receiving tank.

[0040] In some embodiments, the waste gas collection and treatment device further includes:

[0041] An ultrasonic oscillator plate, provided at the bottom of the second receiving tank, configured to provide vibration during the rust removal process; and

[0042] A heating component, provided at the outer side of the second receiving tank.

[0043] On the other hand, the present invention provides a workpiece cleaning system, including the waste gas collection and treatment device of the above embodiments, and the workpiece to be cleaned includes workpieces.

[0044] In some embodiments, an opening is provided at the top of the receiving tank, and the workpiece cleaning system further includes:

[0045] A guiding component, provided above each receiving tank;

[0046] A receiving member, suspended below the guiding component, the internal space of the receiving member is configured to place the workpiece, and the receiving member is movably arranged along the length direction of the guiding component; and

[0047] A lifting mechanism, configured to drive the receiving member to lift and lower, so that the receiving member together with the workpiece is put into the receiving tank through the opening for cleaning.

[0048] In the waste gas collection and treatment device according to the embodiment of the present invention, a blowing port and a suction port are respectively provided on two opposite side walls of the receiving tank of the receiving tank. The blowing component is used to blow air into the receiving tank through the blowing port, and the suction component is used to draw out the gas in the receiving tank. In a state where both the blowing component and the suction component are turned on, an air curtain layer can be formed in the area between the blowing port and the suction port in the receiving tank, which can prevent the waste gas in the receiving tank from escaping, suck away the waste gas below the air curtain layer together, and can realize the environmental protection treatment of the waste gas. At the same time, it solves the problem of waste gas escaping during the opening and closing process of the tank cover in automatic cleaning, and improves the efficiency of automatic cleaning; moreover, the air curtain layer separates the waste gas from the outside world, provides a pollution-free and safe operation environment for the operator, and prevents the operator from being scalded by high-temperature gas and harmed by waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0050] Figure 1 It is a schematic structural diagram of an embodiment of the waste gas collection and treatment device of the present invention;

[0051] Figure 2 It is a schematic structural diagram of the blowing and suction part in the waste gas collection and treatment device of the present invention.

[0052] Description of the reference numerals in the drawings

[0053] 1. First accommodation groove; 2. Air outlet adjusting member; 3. Blowing port; 4. Air curtain layer; 5. Waste gas; 6. Suction port; 7. Second accommodation groove; 8. Air supply pipe; 9. Air volume regulating valve; 10. Blowing component; 11. Ultrasonic oscillator plate; 12. Heating component; 13. Connecting pipe; 14. Pump; 15. Return pipe; 16. Flow regulating valve; 17. Aeration disc; 18. Aeration head; 19. Temperature sensor; 20. Dissolution tank; 21. Suction component; 22. Main suction pipe; 23. Partition board; 24. Suction branch pipe; 25. Tank cover; 26. Accommodating member; 27. Guiding component; 28. Opening; 29. Horizontal angle of the air outlet; 30. Traveling mechanism. Detailed implementation manners

[0054] The present invention will be described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect so defined can be combined with any other one aspect or more aspects, unless explicitly stated that they cannot be combined. In particular, any feature that is considered to be preferred or advantageous can be combined with any other one or more features that are considered to be preferred or advantageous by the heavy-duty machinery.

[0055] The terms "first", "second", etc. used in the present invention are only for convenience of description to distinguish different components with the same name, and do not indicate the sequence or primary-secondary relationship.

[0056] In addition, when an element is referred to as being "on" another element, the element can be directly on the other element, or it can be indirectly on the other element with one or more intermediate elements inserted therebetween. Also, when an element is referred to as being "connected to" another element, the element can be directly connected to the other element, or it can be indirectly connected to the other element with one or more intermediate elements inserted therebetween. In the following text, the same reference numerals denote the same elements.

[0057] The description of the orientation or positional relationship using terms such as "upper", "lower", "top", "bottom", "front", "rear", "inner" and "outer" in the present invention is only for the convenience of describing the present invention, and does not indicate or imply that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the protection scope of the present invention.

[0058] As Figure 1As shown, the present invention provides an exhaust gas collection and treatment device. In some embodiments, it includes a receiving tank, a blowing component 10, and a suction component 21. Among them, the receiving tank can be Figure 1 the first receiving tank 1 and the second receiving tank 7 in

[0059] The receiving tank is configured to hold a cleaning liquid for cleaning workpieces and other items to be cleaned. For example, the first receiving tank 1 holds a high-temperature cleaning liquid, which can be neutral or alkaline, and is used for high-temperature rinsing of the items to be cleaned placed in the tank to remove surface residues of the items to be cleaned; the second receiving tank 7 holds an acidic cleaning liquid for rust removal or scale removal of the items to be cleaned placed in the tank. During the high-temperature rinsing or rust removal process, exhaust gases such as high-temperature water vapor or acid mist will be generated.

[0060] A blowing port 3 is provided on the first side wall of the side wall of the receiving tank, and a suction port 6 is provided on the second side wall. The first side wall and the second side wall are arranged opposite to each other, and both the blowing port 3 and the suction port 6 are higher than the height of the cleaning liquid.

[0061] The blowing component 10 and the suction component 21 are respectively communicated with the blowing port 3 and the suction port 6, and a continuous air curtain layer 4 is formed in the area between the blowing port 3 and the suction port 6 in the receiving tank when both are opened, so as to isolate the exhaust gas 5 below the air curtain layer 4 from the outside. The blowing component 10 can be a blower, and the suction component 21 can be an induced draft fan. Both the blower and the induced draft fan are arranged outside the receiving tank; if the size of the receiving tank is large enough, a powerful direct exhaust fan can also be used to blow air into the receiving tank, and the powerful direct exhaust fan can be installed on the side wall of the receiving tank, either the inner side wall or the outer side wall.

[0062] This embodiment of the present invention has at least one of the following advantages:

[0063] 1. The air curtain layer 4 can prevent the exhaust gas in the receiving tank from escaping, and the exhaust gas 5 below the air curtain layer 4 can be sucked away together through the suction component, meeting the environmental protection requirements for exhaust gas treatment in the automated cleaning process.

[0064] 2. By forming the air curtain layer 4, the problem of exhaust gas escaping during the opening or closing process of the tank cover 25 in automated cleaning can be solved. During the cleaning process, it is not required to close the tank cover 25, and there is no need to frequently open and close the tank cover 25 when performing multiple cleaning tasks, which can improve the efficiency of automated cleaning.

[0065] 3. The air curtain layer 4 separates the exhaust gas 5 from the outside, providing a pollution-free and safe operating environment for the operator, preventing the operator from being scalded by high-temperature gases and harmed by exhaust gases, and improving the safety of the cleaning process.

[0066] In some embodiments, such as Figure 1As shown, the receiving tank includes a tank body and a tank cover 25. The tank body contains cleaning liquid, and the top of the tank body is provided with an opening 28 for placing the workpiece to be cleaned. The tank cover 25 is openably or closably arranged relative to the tank body, and in the closed state, the opening 28 is closed. When the tank cover 25 is open, the workpiece waiting to be cleaned is allowed to be placed in the tank body.

[0067] The tank cover 25 can be connected to the tank body in a variety of ways. For example, one side of the tank cover 25 can be rotatably connected to the side wall of the opening, so that the tank cover 25 can be opened by rotation; or the tank cover 25 is connected to the side wall of the tank body at the opening by sliding. The tank cover 25 can be opened or closed by power elements such as a cylinder, an oil cylinder, and an electric push rod. In order to further prevent gas from escaping, the tank cover 25 can be closed. Moreover, when the amount of waste gas generated in the storage tank is too large, the tank cover 25 can be closed for further protection.

[0068] The exhaust gas collection device in the prior art is generally arranged above the containing tank, such as an air collecting hood, etc., to collect the exhaust gas when it flows upward, so that part of the exhaust gas will escape, which does not meet the environmental protection requirements.

[0069] In order to realize automatic cleaning, the workpiece cleaning system of the present invention includes a guide component 27, a container 26 and a lifting component. The guide component 27 is arranged above the receiving groove, such as a guide rail, and the container 26 is suspended below the guide component 27. The internal space of the container 26 is configured to place the workpiece, and the container 26 is movably arranged along the length direction of the guide component 27; the lifting component is configured to drive the container 26 to rise and fall, so that the container 26 and the workpiece are placed into the receiving groove from the opening 28 for cleaning. A walking mechanism 30 can be arranged on the guide component 27 to drive the container 26 to move along the guide component 27, so as to adjust to a position aligned with the receiving groove.

[0070] The blowing component 10 and the suction component 21 are opened in advance to form an air curtain layer 4 in the receiving tank, and then the receiving component 26 and the workpiece are gradually immersed in the cleaning liquid in the receiving tank through the lifting component. The waste gas generated during the immersion process has been isolated under the air curtain layer 4. After the cleaning is completed, the receiving component 26 and the workpiece can be driven by the lifting component to rise and leave the receiving tank. Subsequently, the receiving component 26 and the workpiece can also be placed in the receiving tank of the next cleaning process through the cooperation of the walking mechanism 30 and the lifting mechanism.

[0071] Based on this automatic cleaning system, since the guide component 27, the receiving component 26 and the lifting component are arranged above the receiving tank, it is impossible to arrange the waste gas collection device according to the prior art. The waste gas collection and treatment device of the present invention can meet the needs of automatic cleaning.

[0072] like Figure 2As shown, the height of the air blowing port 3 is not higher than that of the air suction port 6. Since cleaning generally needs to be carried out in the heated cleaning liquid, after the gas is blown into the receiving tank, it will become hot gas and flow upward in the receiving tank. This setting method can enable the gas to flow out of the air suction port 6 more efficiently and prevent the gas from accumulating in the receiving tank and causing excessive pressure.

[0073] As Figure 2 shown, the air blowing port 3 is at a preset distance above the liquid level. For example, the height of the air blowing port 3 can be more than 200 mm above the liquid level, preventing the liquid from splashing into the air blowing port 3 and weakening the moving speed of the waste gas here, which is convenient for blowing the waste gas 5 towards the air suction port 6.

[0074] If the height of the liquid level is h3, the height h2 of the air blowing port 3 is less than or equal to the height h1 of the air suction port 6. Therefore, the range of the height h2 of the air blowing port 3 is h3 + 200 mm ≤ h2 ≤ h1. Thus, the range of the horizontal angle 29 of the air outlet is: 0° ≤ α ≤ tan -1 ((h1 - (h3 + 200)) / L), where L is the length of the receiving tank, that is, the length in the horizontal projection direction from the air blowing port 3 to the air suction port 6. Selecting and designing the horizontal angle 29 of the air outlet within the above angle range can achieve the best air blowing and air suction effects.

[0075] In some embodiments, the waste gas collection and treatment device further includes an air suction pipe connected between the air suction port 6 and the air suction component 21. The pipe section of the air suction pipe close to the air suction port 6 slopes downward from the end close to the air suction component 21 to the end connected to the air suction port 6. This is beneficial for the gas to condense in the air suction pipe and then flow back into the receiving tank to realize the recovery of the condensate.

[0076] As Figure 1 shown, the waste gas collection and treatment device further includes an air supply pipe 8 and an air volume regulating valve 9. The air blowing component 10 includes a blower. The two ends of the air supply pipe 8 are respectively communicated with the outlet of the blower and the air blowing port 3, and the air volume regulating valve 9 is arranged on the air supply pipe 8. The blower and the air supply pipe 8 are connected by a flange. The air volume regulating valve 9 can adjust the air blowing volume according to the waste gas generation amount to form an air curtain layer 4 with appropriate intensity to isolate the waste gas 5 from the outside.

[0077] Or the waste gas collection and treatment device further includes an air suction pipe and an air volume regulating valve 9. The air suction component 21 includes an induced draft fan. The two ends of the air suction pipe are respectively communicated with the air blowing port 3 and the inlet of the induced draft fan, and the air volume regulating valve 9 is arranged on the air suction pipe. The induced draft fan and the air suction pipe are connected by a flange. The air volume regulating valve 9 can adjust the air suction volume according to the waste gas generation amount to enable the blown-in gas to be discharged in time, thereby forming a continuous and stable air curtain layer 4.

[0078] As Figure 2As shown, the horizontal angle 29 of the air outlet is jointly determined by the positions of the air blowing port 3 and the air suction port 6, and two modes of "horizontal direct blowing-suction" and "upward inclined blowing-suction" can be adopted. For the "upward inclined blowing-suction", the blown gas can flow upward naturally, the gas flow is smoother, which is conducive to forming a stable, continuous and uniformly thick air curtain layer 4 everywhere. For the "horizontal direct blowing-suction", since the heights of the air blowing port 3 and the air suction port 6 are the same, more waste gas 5 can be accommodated between the air curtain layer 4 and the liquid surface, which is suitable for the situation where the amount of waste gas generated is larger.

[0079] In order to adjust the horizontal angle 29 of the air outlet, the present invention can adopt at least the following two methods:

[0080] In one embodiment, the tank body is provided with mounting holes extending in the height direction. The top of the mounting hole is at the same height as the air suction port 6, and the bottom of the mounting hole is lower than the air suction port 6. The waste gas collection and treatment device further includes: an air outlet adjusting member 2, the air blowing port 3 is arranged in the air outlet adjusting member 2, the air outlet adjusting member 2 is movably arranged in the air blowing port 3 in the height direction, and the pitching angle is adjustable. The air outlet adjusting member 2 and the air blowing port 3 are closed by a connecting piece, and the connecting piece can be folded or unfolded in the height direction. The connecting piece can adopt a folding fan structure with high temperature resistance and corrosion resistance.

[0081] This embodiment can continuously adjust the height of the air blowing port 3 to achieve fine adjustment of the height of the air blowing port 3, and cooperate with changing the pitching angle of the air outlet adjusting member 2 itself, so that the blowing direction can be aligned with the air suction port 6, so that the gas can be better sucked out, so as to smoothly take away the waste gas 5 and prevent the pressure in the accommodating tank from being too high. This adjustment method is easy to operate and the adjustment is simple and convenient. When the air outlet adjusting member 2 moves to the top end of the mounting hole, the "horizontal direct blowing-suction" can be realized.

[0082] In one embodiment, a plurality of mounting holes are arranged at intervals in the height direction on the tank body. The topmost mounting hole is at the same height as the air suction port 6, and the remaining mounting holes are all lower than the air suction port 6. The waste gas collection and treatment device further includes: an air outlet adjusting member 2, the air blowing port 3 is arranged in the air outlet adjusting member 2, the air outlet adjusting member can be selectively installed in one of the mounting holes, and the remaining mounting holes can be closed by plugs. For example, the air outlet adjusting member 2 can be installed in the mounting hole by screws, or directly screwed into the mounting hole in a threaded form.

[0083] This embodiment has a simple structure and is easy to adjust. When the air outlet adjusting member 2 moves to the topmost mounting hole, the "horizontal direct blowing-suction" can be realized.

[0084] As Figure 1 shown, the waste gas collection and treatment device of the present invention further includes: a dissolving tank 20, an aeration disc 17, a connecting pipe 13 and a reflux pipe 15.

[0085] Among them, the dissolution tank 20 is configured to hold liquid; the aeration disc 17 is arranged at the bottom area inside the dissolution tank 20, and a plurality of aeration nozzles 18 are provided on the aeration disc 17. During installation, the aeration disc 17 can be horizontally arranged with the aeration nozzles 18 facing upward, and the aeration nozzles 18 are threadedly connected to the aeration disc 17.

[0086] The first end of the connecting pipe 13 communicates with the outlet of the air suction component 21, and the second end communicates with the aeration disc 17 from the bottom of the dissolution tank 20. For example, the connecting pipe 13 and the aeration disc 17 can be threadedly connected. The first end of the return pipe 15 communicates with the bottom area of the dissolution tank 20, and the second end communicates with the receiving tank, and the communication part is between the air suction port 6 and the liquid level of the cleaning liquid in the height direction.

[0087] This embodiment can achieve the recovery of waste gas. The waste gas enters the connecting pipe 13 through the air suction component 21 from the air suction pipe, enters the internal space of the aeration disc 17 and diffuses evenly in the horizontal plane, and finally is evenly ejected through each aeration nozzle 18. The waste gas is evenly mixed with the liquid in the dissolution tank 20 and dissolved in the liquid to achieve the treatment of acidic or alkaline gases, and returns to the receiving tank through the return pipe 15 from the space between the air suction port 6 and the liquid level of the cleaning liquid, further realizing the reuse of the waste liquid, and the liquid in the dissolution tank 20 can be supplemented as needed.

[0088] As Figure 1 shown, the waste gas collection and treatment device of the present invention further includes: a temperature sensor 19 and a pump 14. Among them, the temperature sensor 19 is used to detect the temperature of the liquid in the dissolution tank 20; the pump 14 is arranged on the return pipe 15 and is configured to be turned on when the detected value of the temperature sensor 19 is higher than the preset temperature. The temperature sensor 19 can be fixed in the dissolution tank 20 by threaded connection, or it can also be installed on the outer wall of the dissolution tank 20 when the heat conduction performance of the dissolution tank 20 is good.

[0089] When the temperature of the liquid in the dissolution tank 20 is relatively high, the internal liquid is prone to evaporation, so that the waste gas mixed in the liquid escapes. Therefore, timely returning the liquid to the receiving tank can not only achieve the recovery of the waste liquid, but also further supplement the cleaning liquid in the receiving tank after filtering the waste gas. For example, if the cleaning liquid in the receiving tank is acidic, alkaline or neutral, its pH characteristics will not change much after filtering, so it can be recycled.

[0090] As Figure 1 shown, there are at least two receiving tanks, the blowing component 10 communicates with the blowing ports 3 of each receiving tank, and the air suction component 21 communicates with the air suction ports 6 of each receiving tank.

[0091] The paint, oil stains, and rust on the surface of the workpiece need to go through high-temperature cleaning, residue rinsing, ultrasonic rust removal, residual liquid rinsing, fine cleaning and other processes in sequence. Therefore, multiple receiving tanks can be set accordingly to independently perform each cleaning process. By sharing the blowing component 10 and the suction component 21 for each cleaning tank, the structure can be simplified and the cost can be reduced.

[0092] Valves can be set on the blowing branch pipe and the suction branch pipe corresponding to each receiving tank. When only one receiving tank is used alone, only the valves on the blowing branch pipe and the suction branch pipe corresponding to the used receiving tank need to be opened, and the others are closed. Or multiple receiving tanks work simultaneously. If the cleaning liquids in each receiving tank are the same, multiple workpieces to be cleaned can perform the same cleaning process; if the cleaning liquids in each receiving tank are different, multiple workpieces to be cleaned can perform different cleaning processes simultaneously, thereby improving the working efficiency of the automatic cleaning system. Each receiving tank can collect waste gas in the way of blowing-suction. The waste gas collection structures in each receiving tank are independent of each other and can be independently controlled, making it more flexible to use.

[0093] As Figure 1 shown, there are two receiving tanks, including the first receiving tank 1 and the second receiving tank 7. The first receiving tank 1 is configured to perform high-temperature rinsing on the workpiece to be cleaned, and the second receiving tank 7 is configured to remove rust from the workpiece to be cleaned.

[0094] The waste gas collection and treatment device further includes a suction pipe, including: a suction main pipe 22 and two suction branch pipes 24. The first ends of the two suction branch pipes 24 are respectively communicated with the suction ports 6 of the first receiving tank 1 and the second receiving tank 7, the first end of the suction main pipe 22 is communicated with the second ends of the two suction branch pipes 24, and the second end of the suction main pipe 22 is communicated with the inlet of the suction component 21.

[0095] This embodiment can absorb the gases in the first receiving tank 1 and the second receiving tank 7 respectively through the two suction branch pipes 24, and finally converge into the suction main pipe 22 and be introduced into the dissolution tank 20 for recovery treatment. This kind of device has a simple structure, is suitable for setting multiple receiving tanks, can meet the requirements of a large-scale automatic cleaning system, and can improve the cleaning efficiency.

[0096] As Figure 1 shown, both of the two suction branch pipes 24 are inclined downward from the second end to the first end. The first end of the suction branch pipe 24 is connected to the receiving tank by screws, and the second end is connected to the suction main pipe 22 by a clamp.

[0097] After the gas enters the suction branch pipe 24, condensation will occur due to the temperature drop. The condensate will flow back along the suction branch pipe into the accommodating tank. The inclined suction branch pipe 24 facilitates the condensate to flow back into their respective corresponding accommodating tanks, so as to prevent the suction component 21 from working in a relatively humid environment. For example, the suction branch pipe 24 connected to the first accommodating tank 1 can return the water vapor waste liquid to minimize the cleaning liquid carried away from the first accommodating tank 1; the suction branch pipe 24 connected to the first accommodating tank 1 can condense and return the acid mist waste liquid.

[0098] As Figure 1 shown, a plurality of partition plates 23 are provided in the suction main pipe 22. The first end of the partition plate 23 is connected to the inner wall of the suction main pipe 22, and the second end is a free end. Each partition plate 23 is arranged staggeredly along the extending direction of the suction main pipe 22 to form a circuitous gas flow channel. For example, each partition plate 23 can be distributed on the opposite inner walls of the suction main pipe 22. The partition plate 23 can be made of acid and alkali resistant material and has a mesh hole on its surface. It can be connected to the inner wall of the suction main pipe 22 by screws, or other shaped partition plates can also be used to disperse and block the waste gas.

[0099] In this embodiment, each partition plate 23 is arranged staggeredly in the suction main pipe 22, which is convenient for dispersing the waste gas and making it fully mixed into the liquid. If the cleaning liquids in the two accommodating tanks are acidic and alkaline respectively, then through the action of the partition plate 23, the acidic waste gas and the alkaline waste gas can be fully mixed and neutralized. After entering the dissolution tank 20, even if a small amount of gas escapes, the environmental pollution can be reduced.

[0100] In some embodiments, the partition plate 23 is inclined from the first end to the second end towards the downstream of the air flow, that is, the included angle between the partition plate 23 and the inner side wall of the suction main pipe 22 located downstream of the partition plate 23 is an acute angle, which can reduce the resistance of the waste gas operation and facilitate the suction of the suction component 21 and the return of the waste liquid.

[0101] In some embodiments, as Figure 1 shown, the waste gas collection and treatment device of the present invention further includes: a dissolution tank 20, a connecting pipe 13 and a return pipe 15. Among them, the dissolution tank 20 is configured to accommodate liquid; the first end of the connecting pipe 13 is communicated with the outlet of the induced draft fan, and the second end is communicated with the bottom area of the dissolution tank 20; the first end of the return pipe 15 is communicated with the dissolution tank 20, and the second end is communicated with the first accommodating tank 1 or the second accommodating tank 7, and the communicating part is between the suction port 6 and the liquid level of the cleaning liquid in the height direction.

[0102] Between the pump 14 and the dissolution tank 20, a flow regulating valve 16 can also be provided on the return pipe 15. The flow regulating valve 16 can be connected to the bottom of the dissolution tank 20 by a flange. When the temperature sensor 19 monitors that the liquid temperature in the tank exceeds the preset temperature value, the flow regulating valve 16 and the pump 14 are opened to return the mixed waste liquid to the ultrasonic rust removal tank to realize the recycling of the waste liquid.

[0103] If the first receiving tank 1 is configured to receive a neutral cleaning liquid for high-temperature rinsing of the workpiece to be cleaned, and the second receiving tank 7 is configured to receive an acidic cleaning liquid for rust removal of the workpiece to be cleaned. Since the exhaust gases from the two receiving tanks are still acidic after mixing, the suction branch pipe 24 connected to the first receiving tank 1 can be located above the suction branch pipe 24 connected to the second receiving tank 7, and the suction main pipe 22 can be in a U-shaped structure. The second end of the return pipe 15 communicates with the suction port 6 of the second receiving tank 7.

[0104] In this embodiment, although the exhaust gas condensate collected from the first receiving tank 1 and the second receiving tank 7 can flow back into the receiving tanks through their respective suction branch pipes 24, in the suction main pipe 22, due to the temperature difference between the high-temperature water vapor and the acid mist and the function of the partition plate 23, the exhaust gases can be fully mixed. The exhaust gas condensate after mixing is still acidic. Since the position of the suction branch pipe 24 connected to the second receiving tank 7 is relatively low, the acidic condensate in the suction main pipe 22 can flow back into the second receiving tank 7 through the suction branch pipe 24 connected to the second receiving tank 7 to achieve the reuse of the exhaust gas.

[0105] In this embodiment, if the first receiving tank 1 is configured to receive an alkaline cleaning liquid for high-temperature rinsing of the workpiece to be cleaned; the second receiving tank 7 is configured to receive an acidic cleaning liquid for rust removal of the workpiece to be cleaned. Since the exhaust gases from the two receiving tanks are neutral after mixing, the suction branch pipe 24 connected to the first receiving tank 1 can be located below the suction branch pipe connected to the second receiving tank 7, and the second end of the return pipe 15 communicates with the suction port 6 of the first receiving tank 1.

[0106] In this embodiment, although the exhaust gas condensate collected from the first receiving tank 1 and the second receiving tank 7 can flow back into the receiving tanks through their respective suction branch pipes 24, in the suction main pipe 22, due to the temperature difference between the alkaline high-temperature water vapor and the acid mist and the function of the partition plate 23, the exhaust gases can be fully mixed. The exhaust gas condensate after mixing is neutral. Since the position of the suction branch pipe 24 connected to the first receiving tank 1 is relatively low, the neutral condensate in the suction main pipe 22 can flow back into the first receiving tank 1 through the suction branch pipe 24 connected to the first receiving tank 1 to achieve the reuse of the exhaust gas.

[0107] Because a neutral or alkaline cleaning liquid can be used during high-temperature cleaning, even if neutral condensate flows back into the first receiving tank 1, the influence on the rinsing effect is relatively small. If it returns to the second receiving tank 7, it will dilute the acidic cleaning liquid and affect the rust removal effect.

[0108] Such as Figure 1As shown in the figure, the waste gas treatment system of the present invention further includes: an ultrasonic oscillator plate 11, disposed at the bottom of the second receiving groove 7 and configured to provide vibration during the rust removal process; and a heating component 12, disposed at the outer side of the second receiving groove 7. This structure can accelerate the rust removal process. During the heating rust removal process, acid mist will be generated, which can be collected and treated by the air suction assembly, or further recycled. Since the heating component 12 is provided to accelerate the rust removal process and the temperature is higher than that in the dissolution tank 20, the high-temperature liquid formed after the high-temperature waste gas is mixed with the liquid in the dissolution tank 20 can be returned to the second receiving groove 7 for further utilization.

[0109] In the above embodiment, it includes a blowing assembly, an air suction assembly, and a filtering assembly. Among them, the blowing assembly includes: an air outlet adjusting member 2, an air supply pipe 8, an air volume regulating valve, and a blowing component 10, etc., for blowing air into the receiving groove. The air suction assembly includes: an air volume regulating valve 9, each air suction branch pipe 24, an air suction component 21, an air suction main pipe 22, and a partition plate 23, etc., for extracting the waste gas in the receiving groove and efficiently recycling the waste liquid. The filtering assembly includes: an aeration disc 17, an aeration head 18, a temperature sensor 19, and a dissolution tank 20, etc., for filtering the waste gas and then recycling it.

[0110] Secondly, the present invention also provides a workpiece cleaning system, including: the waste gas collection and treatment device of the above embodiment.

[0111] Such a workpiece cleaning system can achieve safety protection, efficient collection, and environmental protection treatment of waste gas during the cleaning process of parts, meet the environmental protection treatment requirements of waste gas in the automated cleaning process, and is suitable for industrial application. It has at least one of the following advantages:

[0112] 1. Relying on the air curtain layer 4 formed in the receiving groove, the operator is isolated from the waste gas in the tank. By adjusting the blowing air volume and angle through the blowing port 3, a pollution-free and safe operating environment is provided for the operator to prevent the operator from being scalded by high-temperature gas and harmed by waste gas.

[0113] 2. Relying on the combined action of the blowing assembly and the air suction assembly, an air curtain layer 4 is formed above the tank body, solving the problem of waste gas escaping during the opening and closing processes of the tank cover 25 in automated cleaning, achieving efficient collection of waste gas, and improving the efficiency of automated cleaning.

[0114] 3. By obliquely connecting the air suction branch pipe 24 with the receiving groove and arranging the acid mist air suction branch pipe below the high-temperature water vapor air suction branch pipe, the waste gas can be naturally refluxed and reused by relying on the gravity effect. The structure is simple and easy to operate, and the cost is low.

[0115] 4. Interleave mesh partitions 23 in the main suction pipe 22. Through the dispersion and blocking effects of the mesh partitions 23 and the temperature difference between the high-temperature water vapor and the acid mist, the waste gas is fully mixed into liquid in the main suction pipe 22, and then flows back to the ultrasonic rust removal tank to achieve efficient recycling of the acid mist.

[0116] 5. Adopt the aeration method to treat the residual high-temperature water vapor and acid mist, and through devices such as the temperature sensor 19 and the reflux pipe 15, the waste liquid is refluxed to the ultrasonic rust removal tank for recycling again to achieve zero emission of waste gas during the cleaning process.

[0117] In some embodiments, an opening 28 is provided at the top of the receiving tank. The workpiece cleaning system further includes: a guiding member 27, a receiving member 26, and a lifting mechanism.

[0118] Each receiving tank is arranged at different positions in the horizontal plane or may also have a height difference. The guiding member 27 is provided above each receiving tank, such as a guide rail. The receiving member 26 is suspended below the guiding member 27. The internal space of the receiving member 26 is configured to place the workpiece, such as adopting a frame-shaped structure to allow the cleaning liquid to enter, and the receiving member 26 is movably arranged along the length direction of the guiding member 27. The lifting member is configured to drive the receiving member 26 to lift and lower, so that the receiving member 26 together with the workpiece can be placed into the receiving tank through the opening 28 for cleaning. For example, a structure that drives the roller to rotate or a transmission mechanism such as a lead screw nut can be adopted. A traveling mechanism 30, such as a motor, can be provided on the guiding member 27 to drive the receiving member 26 to move along the guiding member 27, so as to adjust the position aligned with the receiving tank.

[0119] Through the traveling mechanism and the lifting mechanism in this embodiment, automatic cleaning can be achieved. After one cleaning process is completed, it can be lifted by the lifting mechanism and then moved by the traveling structure to enter the next cleaning process. For example, after high-temperature rinsing in the first receiving tank 1, it enters the second receiving tank 7 for rust removal treatment.

[0120] The above has introduced in detail an exhaust gas collection and treatment device and a workpiece cleaning system provided by the present invention. Specific embodiments are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An exhaust gas collection and treatment device, characterized in that, Comprising: A receiving groove (1; 7), configured to receive a cleaning liquid, a blowing port (3) is provided on a first side wall of the receiving groove (1; 7), a suction port (6) is provided on a second side wall, the first side wall and the second side wall are oppositely arranged, and both the blowing port (3) and the suction port (6) are higher than the height of the cleaning liquid; an installation hole extending in the height direction is provided on the side wall of the receiving groove, the top of the installation hole is at the same height as the suction port (6), and the bottom of the installation hole is lower than the suction port (6); A blowing component (10) and a suction component (21), respectively communicated with the blowing port (3) and the suction port (6), and form an air curtain layer (4) in the area between the blowing port (3) and the suction port (6) in the receiving groove (1; 7) when both are opened; and An air outlet adjusting member (2), the air outlet adjusting member (2) is movably arranged in the blowing port (3) in the height direction and the pitching angle is adjustable, the air outlet adjusting member (2) and the blowing port (3) are closed by a connecting piece, and the connecting piece can be folded or unfolded in the height direction; Wherein, there are two receiving grooves (1; 7), including a first receiving groove (1) and a second receiving groove (7), the first receiving groove (1) is configured to perform high-temperature rinsing on the workpiece to be cleaned, and the second receiving groove (7) is configured to remove rust from the workpiece to be cleaned; The waste gas collection and treatment device further includes a suction pipe, the suction pipe includes: a suction main pipe (22) and two suction branch pipes (24), the first ends of the two suction branch pipes (24) are respectively communicated with the suction ports (6) of the first receiving groove (1) and the second receiving groove (7), the first end of the suction main pipe (22) is communicated with the second ends of the two suction branch pipes (24), and the second end of the suction main pipe (22) is communicated with the inlet of the suction component (21); the suction main pipe (22) is in a shape of "Ji", and both the two suction branch pipes (24) are inclined downward from the second end to the first end; The first receiving groove (1) is configured to receive a neutral cleaning liquid, the second receiving groove (7) is configured to receive an acidic cleaning liquid, and the suction branch pipe (24) connected to the first receiving groove (1) is located above the suction branch pipe (24) connected to the second receiving groove (7); or the first receiving groove (1) is configured to receive an alkaline cleaning liquid, the second receiving groove (7) is configured to receive an acidic cleaning liquid, and the suction branch pipe (24) connected to the first receiving groove (1) is located below the suction branch pipe (24) connected to the second receiving groove (7).

2. The exhaust gas collection and treatment device according to claim 1, characterized in that The receiving groove (1; 7) includes a groove body and a groove cover (25), an opening (28) for placing the workpiece to be cleaned is provided at the top of the groove body, the groove cover (25) is arranged relative to the groove body to be openable or closable, and closes the opening (28) in the closed state.

3. The exhaust gas collection and treatment device according to claim 1, characterized in that The height of the blowing port (3) is not higher than the height of the suction port (6).

4. The exhaust gas collection and treatment device according to claim 1, wherein The blowing port (3) is higher than the liquid level by a preset distance.

5. The exhaust gas collection and treatment device according to claim 1, wherein It further includes an air suction pipe connected between the air suction port (6) and the air suction component (21), and a pipe section of the air suction pipe near the air suction port (6) slopes downward from one end close to the air suction component (21) to the end connected to the air suction port (6).

6. The waste gas collection and treatment device according to claim 1, wherein the waste gas collection and treatment device further includes an air supply pipe (8) and an air volume regulating valve (9), the blowing component (10) includes a blower, two ends of the air supply pipe (8) are respectively communicated with the outlet of the blower and the blowing port (3), and the air volume regulating valve (9) is arranged on the air supply pipe (8); or the waste gas collection and treatment device further includes an air suction pipe and an air volume regulating valve (9), the air suction component (21) includes an induced draft fan, two ends of the air suction pipe are respectively communicated with the air suction port (6) and the inlet of the induced draft fan, and the air volume regulating valve (9) is arranged on the air suction pipe.

7. The exhaust gas collection and treatment device according to claim 1, wherein A plurality of mounting holes are arranged at intervals in the height direction on the side wall of the accommodation groove, the topmost mounting hole is at the same height as the air suction port (6), and the remaining mounting holes are all lower than the air suction port (6); the waste gas collection and treatment device further includes: an air outlet adjusting member (2), the air outlet adjusting member (2) is selectively installed in one of the mounting holes, and the remaining mounting holes are closed.

8. The exhaust gas collection and treatment device according to claim 1, characterized in that, It further includes: a dissolution tank (20) configured to hold liquid; an aeration disc (17) arranged in the bottom area of the dissolution tank (20), and a plurality of aeration heads (18) are arranged on the aeration disc (17); a connecting pipe (13) with the first end communicated with the outlet of the air suction component (21) and the second end communicated with the aeration disc (17) from the bottom of the dissolution tank (20); and a return pipe (15) with the first end communicated with the dissolution tank (20) and the second end communicated with the accommodation tank (1; 7), and the communication part is between the air suction port (6) and the liquid level of the cleaning liquid in the height direction.

9. The exhaust gas collection and treatment device according to claim 8, characterized in that, It further includes: a temperature sensor (19) for detecting the temperature of the liquid in the dissolution tank (20); and a pump (14) arranged on the return pipe (15) and configured to be turned on when the detected value of the temperature sensor (19) is higher than a preset temperature.

10. The exhaust gas collection and treatment device according to claim 1, wherein A plurality of partition plates (23) are arranged in the air suction main pipe (22), the first end of the partition plate (23) is connected to the inner wall of the air suction main pipe (22), the second end is a free end, and each partition plate (23) is arranged staggeredly along the extending direction of the air suction main pipe (22).

11. The exhaust gas collection and treatment device according to claim 10, characterized in that, The partition plate (23) slopes downward from the first end to the second end towards the downstream of the air flow.

12. The exhaust gas collection and treatment device according to claim 1, characterized in that, It further includes: a dissolution tank (20) configured to hold liquid; a connecting pipe (13) with the first end communicated with the outlet of the air suction component (21) and the second end communicated with the bottom area of the dissolution tank (20); and a return pipe (15) with the first end communicated with the dissolution tank (20) and the second end communicated with the first accommodation tank (1) or the second accommodation tank (7), and the communication part is between the air suction port (6) and the liquid level of the cleaning liquid in the height direction.

13. The exhaust gas collection and treatment device according to claim 12, wherein: the first accommodating groove (1) is configured to accommodate a neutral cleaning liquid, the second accommodating groove (7) is configured to accommodate an acidic cleaning liquid, and the second end of the return pipe (15) communicates with the suction port (6) of the second accommodating groove (7); or the first accommodating groove (1) is configured to accommodate an alkaline cleaning liquid, the second accommodating groove (7) is configured to accommodate an acidic cleaning liquid, and the second end of the return pipe (15) communicates with the suction port (6) of the first accommodating groove (1).

14. The exhaust gas collection and treatment device according to claim 1, wherein It further includes: an ultrasonic oscillator plate (11), provided at the bottom of the second accommodating groove (7) and configured to provide vibration during the rust removal process; and a heating component (12), provided at the outer side of the second accommodating groove (7).

15. A workpiece cleaning system, characterized in that, It includes: the exhaust gas collection and treatment device according to any one of claims 1 to 14, wherein the workpiece to be cleaned includes a workpiece.

16. The workpiece cleaning system according to claim 15, wherein, An opening (28) is provided at the top of the accommodating groove (1; 7), and the workpiece cleaning system further includes: a guiding component (27), provided above each accommodating groove (1; 7); a containing component (26), suspended below the guiding component (27), the internal space of the containing component (26) is configured to place a workpiece, and the containing component (26) is movably arranged along the length direction of the guiding component (27); and a lifting mechanism, configured to drive the containing component (26) to lift and lower, so that the containing component (26) together with the workpiece is placed into the accommodating groove (1; 7) from the opening (28) for cleaning.

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