Wastewater treatment device for spraying assembly line

Abstract

The invention relates to a wastewater treatment device for a spraying assembly line. The wastewater treatment device comprises a box body, a filtering mechanism, an elastic part, a water adding pipe, a chemical adding mechanism and a driving mechanism, the dosing mechanism comprises a gear pump and a pipeline. According to the design, the gravity of wastewater is used as a power source to drive the filtering mechanism to slide down, the chemical adding mechanism to add chemicals and the water adding pipe to rotate; furthermore, accurate addition of chemical agents can be realized, and agent waste or insufficient reaction is avoided; continuous rotation of the water adding pipe and alternate operation of the multiple sliding channels form an assembly line type treatment process, and the treatment efficiency of the spraying wastewater and the operation stability of the device are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wastewater treatment, in particular to a wastewater treatment device for a spraying production line. BACKGROUND

[0002] Spraying is a coating method that disperses uniform and fine mist droplets onto the surface of the coated object by means of pressure or centrifugal force through a spray gun or a disc atomizer. Excess paint during the spraying process is treated by water capture. In order to reduce the waste of water resources, the wastewater generated during the spraying process is treated by adding chemical reagents to precipitate the paint dissolved in the wastewater, and then the wastewater is reused after filtration treatment.

[0003] For example, the patent with publication number CN119306276B discloses a wastewater treatment device for a spraying production line and a treatment method thereof, which includes a mounting frame, a treatment box, a sealing plate, a storage frame, a water outlet pipe, a stirring component, etc. The mounting frame is fixedly connected with the treatment box, and the treatment box is uniformly provided with six pollution discharge holes. Impurities are intercepted by the filter baffle during the rotation with the wastewater, and the impurities filtered out of the filter baffle are scraped to above the pollution discharge hole of the treatment box by the scraper, and the impurities fall into the storage frame through the pollution discharge hole of the treatment box.

[0004] This device has two significant deficiencies when treating spraying wastewater. First, the treatment process is discontinuous, and the device needs to be shut down to complete the chemical reagent addition and other treatment steps. Since the spraying production line is usually continuous, frequent shutdown for wastewater treatment will cause the interruption of the entire spraying process, which not only significantly prolongs the time cost of wastewater treatment, but also negatively affects the spraying production efficiency. Second, there is a lack of precise control mechanism in the chemical reagent addition link, and the operator cannot adjust the amount of reagent in real time according to the actual composition and pollution degree of the wastewater. Insufficient reagent addition will cause the paint in the wastewater to be unable to be precipitated, affecting the subsequent filtration treatment effect; while excessive reagent will cause waste of chemical reagents, increase the treatment cost, and possibly introduce new pollutants. SUMMARY

[0005] In view of the above problems existing in the prior art, the technical problem to be solved by the present application is that the existing device has two significant deficiencies when treating spraying wastewater. First, the treatment process is discontinuous, and the device needs to be shut down to complete the chemical reagent addition and other treatment steps. Second, there is a lack of precise control mechanism in the chemical reagent addition link, and the operator cannot adjust the amount of reagent in real time according to the actual composition and pollution degree of the wastewater.

[0006] To solve the above technical problems, the present application adopts the following technical scheme: a wastewater treatment device for a spraying production line, comprising: a box body, the box body is provided with a plurality of sliding channels along the axial direction; filtering mechanism, each of the sliding channels is provided with a processing mechanism to isolate the sliding channel and cooperate with the inner side wall of the sliding channel to form a cavity for containing wastewater; the filtering mechanism is slidingly installed in the box; elastic member, which applies an upward elastic force to the filtering mechanism; water adding pipe, which is coaxially and rotatably installed on the box, and the water inlet end of the water adding pipe faces one of the sliding channels to add water to the sliding channel; medicine adding mechanism, which is provided in one-to-one correspondence with the sliding channels; the medicine adding mechanism comprises a gear pump and a pipeline, the gear pump is installed on the pipeline to add medicine into the corresponding sliding channel through the pipeline; and driving mechanism, which drives the gear pump and the water adding pipe to rotate by the driving mechanism for the downward sliding of the filtering mechanism.

[0007] Preferably, the driving mechanism comprises a ratchet wheel, a driving gear, a rack, a ratchet, a pull rope, a first spring and a second spring; the ratchet wheel is coaxially fixed with the water adding pipe; the driving gear is coaxially fixed with the input shaft of the gear pump; the rack is slidingly installed on the box along the tangential direction of the ratchet wheel, and the rack and the driving gear are in mesh with each other; the ratchet is slidingly installed on the rack, and the sliding directions of the ratchet and the rack are arranged perpendicularly to each other, one end of the ratchet abuts against the ratchet wheel; the first spring applies an elastic force to the ratchet towards the ratchet wheel; one end of the pull rope is connected with one end of the rack, and the other end of the pull rope is connected with the filtering mechanism; the second spring applies an elastic force to the rack away from the pull rope.

[0008] Preferably, the driving mechanism further comprises a guide wheel; the guide wheel is rotatably installed on the box, and the pull rope abuts against the guide wheel.

[0009] Preferably, the filtering mechanism comprises a filter screen, an abutment plate, a driving member and a drain pipe; the filter screen and the abutment plate are slidingly installed in the sliding channel along the axial direction of the box, and the filter screen is above the abutment plate; the drain pipe is fixedly installed on the abutment plate, and one end of the drain pipe penetrates through the abutment plate; when the abutment plate abuts against the filter screen, the filter holes on the filter screen are blocked, and the filter screen blocks the drain pipe; the driving member connects the filter screen and the abutment plate to drive the filter screen and the abutment plate to slide relative to each other.

[0010] Preferably, the cleaning mechanism is further provided to clean the impurities on the filter screen.

[0011] Preferably, the cleaning mechanism comprises a scraper, a rotating shaft and a transmission assembly; the cross section of the sliding channel in the axial direction of the box is arranged in a sector shape; the rotating shaft is rotatably installed on the filter screen, and the rotating shaft coincides with the end point of the sector area; the scraper is in sliding abutment with the filter screen, and one end of the scraper is fixedly connected with the rotating shaft; the transmission assembly drives the rotating shaft to rotate reciprocatingly.

[0012] Preferably, the transmission assembly is arranged on the side of the abutment plate away from the filter screen, and the transmission assembly comprises a plug rod, a swing rod, a disc, a cylindrical slider, a first bevel gear, a second bevel gear, a first pulley, a second pulley, a flat belt and a friction wheel; the plug rod is coaxially and slidingly inserted with the rotating shaft through a spline, and the plug rod is rotatably installed on the abutment plate; the swing rod is arranged in parallel with the scraper, one end of the swing rod is fixedly connected with the plug rod, and a sliding groove is formed in the length direction of the swing rod; the disc is rotatably installed on the abutment plate, one end of the cylindrical slider is eccentrically fixed on one side of the disc, and the other end of the cylindrical slider extends into the sliding groove; the first bevel gear is coaxially fixed with the disc, the second bevel gear is rotatably installed on the abutment plate, and the second bevel gear is in meshing engagement with the first bevel gear; the first pulley is coaxially fixed with the second bevel gear, the second pulley is rotatably installed on the abutment plate, and the first pulley is connected with the second pulley through the flat belt; the friction wheel is coaxially fixed with the second pulley, and the friction wheel is in sliding abutment with the inner side wall of the sliding channel.

[0013] Preferably, the impurity removal mechanism further comprises an impurity removal pipe, a water inlet pipe, a reversing plate and a third spring; opposite sides of the scraper in the width direction are respectively provided with accommodating cavities, and the accommodating cavities are open downward and sideward; a side wall of the rotating shaft is provided with a fan-shaped connecting port, and the scraper is respectively provided with two connecting channels, the two connecting channels are arranged in one-to-one correspondence with the two accommodating cavities, one end of the connecting channel is in communication with the side of the accommodating cavity close to rotation, and the other end of the connecting channel is in communication with the rotating shaft through the fan-shaped connecting port; a connecting cavity is formed in the plug rod, and the connecting cavity is open at the upper end to communicate with the rotating shaft; after the abutting plate abuts against the filter screen, the upper end opening of the connecting cavity abuts against the inner wall of the rotating shaft to cut off the water flow into the accommodating groove; one end of the water inlet pipe is fixedly installed on the side wall of the plug rod and communicates with the connecting cavity; the impurity removal pipe is arranged in one-to-one correspondence with the accommodating cavity, and the impurity removal pipe is in communication with the side of the accommodating cavity away from rotation; the reversing plate slides through the scraper, and the sliding direction of the reversing plate is perpendicular to the scraper to close the connecting channel; two through holes corresponding to the connecting channel are formed in the reversing plate, and after the side wall of the accommodating cavity and the sliding channel abut against each other, the through holes on the reversing plate are pushed to communicate with the two sides of the corresponding connecting channel; the third spring applies an elastic force to the reversing plate to push the connecting channel of the reversing plate.

[0014] Compared with the prior art, the present application has at least the following advantages: 1. In the present application, the gravity of wastewater is used as a power source to drive the sliding of the filtering mechanism, the addition of chemicals by the chemical adding mechanism, and the rotation of the water adding pipe; further, precise addition of chemicals can be realized, and waste of chemicals or insufficient reaction can be avoided; the continuous rotation of the water adding pipe and the alternating operation of the multiple sliding channels form a flow line type processing flow, which significantly improves the processing efficiency of the sprayed wastewater and the stability of the device operation.

[0015] 2. In the present application, the one-way transmission characteristics of the ratchet and the ratchet wheel are combined with the meshing transmission of the rack and the driving gear to realize synchronous driving of the gear pump to add chemicals and one-way switching of the channel of the water adding pipe when the filtering mechanism slides downward, and only the rack returns while the water adding pipe continuously rotates in one direction when it slides upward and resets, which ensures the continuity of the alternating processing of multiple channels, and at the same time, the resetting action of the ratchet and the rack is controlled by the spring elastic force, so that the precise cooperation of each component is realized, and the stability of the device operation is improved.

[0016] 3. In the present application, under normal circumstances, the driving member makes the filter screen and the abutment plate abut each other: the abutment plate blocks the filter holes on the filter screen, and the filter screen blocks the port of the drain pipe at the same time, at this time, the inner side wall of the sliding channel, the filter screen and the abutment plate together enclose a closed cavity, ensuring that the sprayed wastewater and the chemical agent are fully reacted in the cavity without leakage; when the reaction is completed and needs to be filtered, the driving member drives the filter screen and the abutment plate to slide relative to each other, the filter holes and the drain pipe are opened synchronously, and the wastewater realizes solid-liquid separation through the filter holes of the filter screen, and the filtered clean water is discharged through the drain pipe; after the filtration is completed, the driving member drives the two to reset and abut again, and a closed cavity is reformed, and the elastic member pushes the filter mechanism as a whole to slide upward, so as to prepare for the next round of wastewater treatment, in this way, the abutment and sealing of the filter screen and the abutment plate can ensure the closed nature of the cavity in the reaction stage, and prevent the loss of the agent or the leakage of untreated wastewater; the synchronous opening and closing design during relative sliding can integrate the filtering and draining actions, reduce the process interval, and improve the processing efficiency.

[0017] 4. In the present application, the transmission assembly drives the rotating shaft to rotate, since the rotating shaft coincides with the end point of the fan-shaped sliding channel, and one end of the scraper is fixed with the rotating shaft and the other end is in sliding abutment with the filter screen, the rotating shaft drives the scraper to make fan-shaped sweeping along the surface of the filter screen when rotating. The close fit of the scraper and the filter screen ensures that it can scrape off the paint residues, metal particles and other impurities remaining on the filter screen, which are moved along the fan-shaped path under the pushing of the scraper and finally collected to the edge of the sliding channel; and when the filter mechanism slides downward, the swinging of the scraper can effectively mix the sprayed wastewater and the chemical agent in the cavity, accelerate the reaction speed, and avoid the influence of local high or low concentration of the agent on the treatment effect.

[0018] 5. In the present application, when the abutment plate and the filter screen abut to form a closed cavity, the upper end opening of the connecting cavity in the plug rod is in close abutment with the inner wall of the rotating shaft, and the water supply is completely cut off, at this time, the scraper rotates with the rotating shaft, and only relies on its own swinging to play a stirring role on the sprayed wastewater and the chemical agent in the cavity, promoting the full mixing and reaction of the two. When the abutment plate and the filter screen are separated, the upper end opening of the connecting cavity is separated from the inner wall of the rotating shaft, and the water supply channel is opened, the external water source enters the connecting cavity of the plug rod through the water inlet pipe, enters the inside of the rotating shaft, and then enters the connecting channel of the scraper through the fan-shaped connecting port of the rotating shaft side wall, and then flows into the containing cavity; finally, the impurities collected in the containing cavity are discharged through the impurity discharge pipe away from the rotating side of the containing cavity under the water flow pushing force. When the scraper leaves the side wall of the sliding channel, the reversing plate is reset by the third spring after losing the pushing force, the through hole is staggered with the connecting channel to close the channel, so as to avoid water leakage; at the same time, the fan-shaped connecting port changes with the rotating angle of the rotating shaft, and always keeps the communication with the connecting channel, so as to ensure that the washing time accurately matches the rotating position of the scraper. The water cut-off design when the abutment plate and the filter screen abut can prevent the water flow from entering the containing cavity to interfere with the reaction in the stirring stage, and ensure that the stirring effect is pure and stable. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application, the drawings required to be used in the specific embodiments will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn according to the actual proportion.

[0020] Figure 1 A top view of a wastewater treatment device for a spraying assembly line provided in the present embodiment.

[0021] Figure 2 A bottom view of a wastewater treatment device for a spraying assembly line provided in the present embodiment.

[0022] Figure 3 A perspective view of a filtering mechanism and a cleaning mechanism provided in the present embodiment.

[0023] Figure 4 A perspective view of a dosing mechanism provided in the present embodiment.

[0024] Figure 5 A perspective sectional view of a foreign matter discharging mechanism provided in the present embodiment.

[0025] Figure 6 A sectional view of a foreign matter discharging mechanism provided in the present embodiment.

[0026] Reference signs: 1, box body; 11, sliding channel; 2, filtering mechanism; 21, filter screen; 22, abutting plate; 23, drain pipe; 3, elastic member; 4, water adding pipe; 5, dosing mechanism; 51, gear pump; 52, pipeline; 6, driving mechanism; 61, ratchet wheel; 62, driving gear; 63, rack; 64, ratchet; 65, pull rope; 66, guide wheel; 7, cleaning mechanism; 71, scraper; 72, rotating shaft; 73, insertion rod; 74, swing rod; 75, disc; 76, columnar sliding block; 77, first bevel gear; 78, second bevel gear; 79, first pulley; 710, second pulley; 711, flat belt; 712, friction wheel; 713, sliding groove; 8, foreign matter discharging mechanism; 81, foreign matter discharging pipe; 82, water inlet pipe; 83, reversing plate; 84, containing cavity; 85, fan-shaped connecting port; 86, connecting channel; 87, connecting cavity; 88, through hole. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the specific embodiments of the present application, the drawings required to be used in the specific embodiments will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn according to the actual proportion.

[0028] Reference signs: 1, box body; 11, sliding channel; 2, filtering mechanism; 21, filter screen; 22, abutting plate; 23, drain pipe; 3, elastic member; 4, water adding pipe; 5, dosing mechanism; 51, gear pump; 52, pipeline; 6, driving mechanism; 61, ratchet wheel; 62, driving gear; 63, rack; 64, ratchet; 65, pull rope; 66, guide wheel; 7, cleaning mechanism; 71, scraper; 72, rotating shaft; 73, insertion rod; 74, swing rod; 75, disc; 76, columnar sliding block; 77, first bevel gear; 78, second bevel gear; 79, first pulley; 710, second pulley; 711, flat belt; 712, friction wheel; 713, sliding groove; 8, foreign matter discharging mechanism; 81, foreign matter discharging pipe; 82, water inlet pipe; 83, reversing plate; 84, containing cavity; 85, fan-shaped connecting port; 86, connecting channel; 87, connecting cavity; 88, through hole. Figures 1-6The embodiment provided by the present application provides a wastewater treatment device for a spraying pipeline, which comprises a box body 1, a filtering mechanism 2, an elastic member 3, a water adding pipe 4, a chemical adding mechanism 5 and a driving mechanism 6. A plurality of sliding channels 11 are formed in the box body 1 along the axial direction. Each sliding channel 11 is provided with a treatment mechanism to separate the sliding channel 11 and form a cavity for containing wastewater together with the inner side wall of the sliding channel 11. The filtering mechanism 2 is slidingly installed in the box body 1. The elastic member 3 applies an upward elastic force to the filtering mechanism 2. Specifically, the elastic member 3 is an elastic telescopic rod. The water adding pipe 4 is coaxially and rotatably installed on the box body 1, and the water inlet end of the water adding pipe 4 faces one of the sliding channels 11 to add water to the sliding channel 11. The chemical adding mechanism 5 is arranged in one-to-one correspondence with the sliding channels 11. The chemical adding mechanism 5 comprises a gear pump 51 and a pipeline 52. The gear pump 51 is installed on the pipeline 52 to add chemicals into the corresponding sliding channel 11 through the pipeline 52. The downward sliding movement of the filtering mechanism 2 is driven by the driving mechanism 6 to rotate the gear pump 51 and the water adding pipe 4.

[0029] In specific implementation, the water adding pipe 4 adds spraying wastewater into one of the sliding channels 11. The wastewater enters the cavity formed by the inner side wall of the sliding channel 11 and the filtering mechanism 2. As the amount of wastewater increases, the gravity of the wastewater forces the filtering mechanism 2 to slide downward along the sliding channel 11 and compresses the elastic member 3 to store energy. When the filtering mechanism 2 slides downward to the set position and stops, the amount of wastewater in the cavity remains fixed. During the downward sliding movement of the filtering mechanism 2, the driving mechanism 6 is driven to continuously add chemicals into the current sliding channel 11 through the pipeline 52, and the water adding pipe 4 continuously rotates to the next sliding channel 11 and starts to add water into the sliding channel 11. After the reaction of the chemicals and the wastewater is completed, the filtering mechanism 2 filters and discharges the treated wastewater. Then, the elastic force of the elastic member 3 overcomes the gravity of the wastewater to push the filtering mechanism 2 to slide upward to the original position.

[0030] The design uses the gravity of the wastewater as a power source to drive the downward sliding movement of the filtering mechanism 2, the chemical adding of the chemical adding mechanism 5 and the rotation of the water adding pipe 4. In this way, the precise addition of chemicals can be realized to avoid waste of chemicals or insufficient reaction. The continuous rotation of the water adding pipe 4 and the alternate operation of the plurality of sliding channels 11 form a pipeline type processing flow, which significantly improves the processing efficiency of the spraying wastewater and the stability of the device operation.

[0031] Reference Figures 1-6In other embodiments, the driving mechanism 6 comprises: a ratchet wheel 61, a driving gear 62, a rack 63, a ratchet 64, a pull rope 65, a first spring and a second spring; the ratchet wheel 61 is coaxially fixed with the water adding pipe 4; the driving gear 62 is coaxially fixed with the input shaft of the gear pump 51; the rack 63 is slidingly installed on the box 1 along the tangential direction of the ratchet wheel 61, and the rack 63 is in mesh with the driving gear 62; the ratchet 64 is slidingly installed on the rack 63, and the sliding directions of the ratchet 64 and the rack 63 are perpendicular to each other, and one end of the ratchet 64 abuts against the ratchet wheel 61; the first spring applies a spring force to the ratchet 64 towards the ratchet wheel 61; one end of the pull rope 65 is connected with one end of the rack 63, and the other end of the pull rope 65 is connected with the filtering mechanism 2; and the second spring applies a spring force to the rack 63 away from the pull rope 65.

[0032] In specific implementation, the water adding pipe 4 adds water into the sliding channel 11, as the water amount increases, the filtering mechanism 2 is downwardly slid under the action of gravity, the rack 63 is slidingly driven along the tangential direction by the pull rope 65, and the second spring is stretched to store the elastic force; when the rack 63 slides, the driving gear 62 is in mesh with the rack 63 to drive the input shaft of the gear pump 51 to rotate, so that the gear pump 51 adds the chemical agent into the current sliding channel 11 through the pipeline 52. At the same time, the ratchet 64 on the rack 63 keeps abutting against the ratchet wheel 61 under the action of the spring force of the first spring, and in the sliding process of the rack 63, the ratchet 64 drives the ratchet wheel 61 to rotate in one direction, and the ratchet wheel 61 drives the water adding pipe 4 to rotate synchronously, when the filtering mechanism 2 slides down to the set position, the water adding pipe 4 is just rotated to the next sliding channel 11 and starts to add water.

[0033] After the chemical agent reacts with the wastewater, the filtering mechanism 2 filters and discharges the wastewater, the weight in the cavity is reduced, the elastic member 3 pushes the filtering mechanism 2 to slide upward, the pulling force of the pull rope 65 is reduced, and the second spring releases the elastic force to drive the rack 63 to slide reversely to reset; at this time, the ratchet 64 moves reversely with the rack 63, is compressed by the slope of the tooth surface of the ratchet wheel 61 to compress the first spring, and slides away from the ratchet wheel 61, so that the rack 63 reversely slides without driving the ratchet wheel 61 to rotate, and the water adding pipe 4 keeps in the state of rotating in one direction.

[0034] This design realizes the synchronous driving of the gear pump 51 to add the chemical agent and the water adding pipe 4 to switch the channels in one direction when the filtering mechanism 2 slides downward, only the rack 63 resets while the water adding pipe 4 continuously rotates in one direction when it slides upward to reset, which ensures the continuity of the alternating processing of multiple channels, and through the spring elastic force to control the resetting action of the ratchet 64 and the rack 63, the movement of each component is accurately matched, and the stability of the device operation is improved.

[0035] Further, the driving mechanism 6 further comprises a guide wheel 66; the guide wheel 66 is rotatably installed on the box body 1, and the pull rope 65 abuts against the guide wheel 66; the guide wheel 66 functions to change the pulling direction of the pull rope 65, converts the sliding force of the filter mechanism 2 in the vertical direction into the tangential sliding driving force required by the rack 63, realizes efficient force transmission in different directions, and through the rolling contact between the wheel surface of the guide wheel 66 and the pull rope 65, the friction resistance of the pull rope 65 when sliding is greatly reduced, the direct friction between the pull rope 65 and the internal structure of the box body 1 is reduced, the pull rope 65 is prevented from being broken due to long-term wear and tear, and the service life of the components is prolonged.

[0036] Referring to Figures 1-6 In other embodiments, the filter mechanism 2 comprises a filter screen 21, an abutment plate 22, a driving member, and a drain pipe 23; the filter screen 21 and the abutment plate 22 are both slidably installed in the sliding channel 11 along the axial direction of the box body 1, and the filter screen 21 is located above the abutment plate 22; the drain pipe 23 is fixedly installed on the abutment plate 22, and one end of the drain pipe 23 penetrates through the abutment plate 22; when the abutment plate 22 abuts against the filter screen 21, the filter holes on the filter screen 21 are blocked, and the filter screen 21 blocks the port of the drain pipe 23; the driving member connects the filter screen 21 and the abutment plate 22 to drive the relative sliding of the filter screen 21 and the abutment plate 22; specifically, the driving member can be a hydraulic cylinder; Specifically, under normal circumstances, the driving member makes the filter screen 21 and the abutment plate 22 abut against each other: the abutment plate 22 blocks the filter holes on the filter screen 21, and the filter screen 21 simultaneously blocks the port of the drain pipe 23, at this time, the inner side wall of the sliding channel 11, the filter screen 21, and the abutment plate 22 together enclose a closed cavity, ensuring that the sprayed wastewater and the chemical agent fully react in the cavity without leakage; when filtration is needed after the reaction is completed, the driving member drives the filter screen 21 and the abutment plate 22 to slide relatively, the filter holes and the drain pipe 23 are opened synchronously, the wastewater realizes solid-liquid separation through the filter holes of the filter screen 21, and the filtered clean water is discharged through the drain pipe 23; after filtration is completed, the driving member drives the two to reset and abut against each other again, re-forming a closed cavity, and cooperating with the elastic member 3 to push the filter mechanism 2 to slide upward as a whole, preparing for the next round of wastewater treatment; in this way, the abutment and sealing of the filter screen 21 and the abutment plate 22 can ensure the closed nature of the cavity during the reaction stage, avoiding the loss of the agent or the leakage of untreated wastewater; the synchronous opening and closing design during relative sliding can integrate filtration and drainage actions, reduce process intervals, and improve processing efficiency.

[0037] Referring to Figures 1-6In other embodiments, the cleaning mechanism 7 is further included to clean the impurities on the filter screen 21, so as to effectively avoid the impurities from being accumulated and blocked at the filter holes, ensure the smooth passing of the wastewater through the filter screen 21 during the subsequent filtration, and maintain the stable filtering efficiency. Further, the cleaning mechanism 7 includes a scraper 71, a rotating shaft 72 and a transmission assembly. The cross section of the sliding channel 11 in the axial direction of the box body 1 is arranged in a fan shape. The rotating shaft 72 is rotatably installed on the filter screen 21, and the rotating shaft 72 coincides with the end point of the fan-shaped area. The scraper 71 is in sliding abutment with the filter screen 21, and one end of the scraper 71 is fixedly connected with the rotating shaft 72. The transmission assembly drives the rotating shaft 72 to rotate back and forth.

[0038] In specific implementation, the transmission assembly drives the rotating shaft 72 to rotate. Since the rotating shaft 72 coincides with the end point of the fan-shaped sliding channel 11, and one end of the scraper 71 is fixedly connected with the rotating shaft 72 and the other end is in sliding abutment with the filter screen 21, the rotating shaft 72 drives the scraper 71 to make a fan-shaped sweeping motion along the surface of the filter screen 21 when the rotating shaft 72 rotates. The close abutment of the scraper 71 and the filter screen 21 ensures that the scraper 71 can scrape off the paint residues, metal particles and other impurities remaining on the filter screen 21. These impurities are moved along the fan-shaped path under the pushing of the scraper 71, and are finally collected to the edge of the sliding channel 11. When the filtering mechanism 2 slides downward, the swinging of the scraper 71 can effectively mix the spraying wastewater and the chemical agent in the cavity, accelerate the reaction speed, and avoid the local chemical agent concentration being too high or too low to affect the treatment effect.

[0039] Referring to Figures 1-6 In other embodiments, the transmission assembly is arranged on the side of the abutment plate 22 away from the filter screen 21. The transmission assembly includes a plug rod 73, a swing rod 74, a disc 75, a columnar sliding block 76, a first bevel gear 77, a second bevel gear 78, a first pulley 79, a second pulley 710, a flat belt 711 and a friction wheel 712. The plug rod 73 is coaxially and slidingly inserted with the rotating shaft 72, and the plug rod 73 is rotatably installed on the abutment plate 22. The swing rod 74 is arranged in parallel with the scraper 71, one end of the swing rod 74 is fixedly connected with the plug rod 73, and a sliding groove 713 is formed in the length direction of the swing rod 74. The disc 75 is rotatably installed on the abutment plate 22, one end of the columnar sliding block 76 is eccentrically fixed on one side of the disc 75, and the other end of the columnar sliding block 76 extends into the sliding groove 713. The first bevel gear 77 is coaxially fixed with the disc 75, the second bevel gear 78 is rotatably installed on the abutment plate 22, and the second bevel gear 78 is in meshing engagement with the first bevel gear 77. The first pulley 79 is coaxially fixed with the second bevel gear 78, the second pulley 710 is rotatably installed on the abutment plate 22, and the first pulley 79 and the second pulley 710 are connected through the flat belt 711. The friction wheel 712 is coaxially fixed with the second pulley 710, and the friction wheel 712 is in sliding abutment with the inner side wall of the sliding channel 11.

[0040] In the embodiment, when the filtering mechanism 2 slides downward, the abutting plate 22 moves downward synchronously, the friction wheel 712 on one side of the abutting plate 22 rotates under the friction force caused by the sliding abutment with the inner wall of the sliding channel 11, drives the coaxial second pulley 710 to rotate, drives the first pulley 79 to rotate through the flat belt 711, drives the second bevel gear 78 coaxial with the first pulley 79 to rotate synchronously, and then meshes with the first bevel gear 77 to drive the disc 75 to rotate. The cylindrical sliding block 76 on the disc 75 slides along the sliding groove 713 of the swing rod 74, pushes the swing rod 74 to swing around the plug rod 73 as the axis, and drives the rotating shaft 72 to rotate due to the coaxial sliding insertion of the plug rod 73 and the rotating shaft 72, and finally makes the scraper 71 swing synchronously with the rotating shaft 72 in the fan-shaped sliding channel 11. In this process, the spline connection ensures that the plug rod 73 and the rotating shaft 72 rotate synchronously while adapting to the axial displacement change when the filter screen 21 and the abutting plate 22 slide relative to each other; the sliding abutment of the friction wheel 712 with the inner wall of the channel converts the vertical sliding of the filtering mechanism 2 into the rotation of the friction wheel 712, changes the motion direction and rotation speed through multi-stage transmission of the pulley and bevel gear, and makes the scraper 71 obtain an adaptive swing frequency.

[0041] Referring to Figures 1-6 In another embodiment, the impurity removal mechanism 8 comprises an impurity removal pipe 81, a water inlet pipe 82, a reversing plate 83 and a third spring. The opposite sides of the scraper 71 in the width direction are respectively provided with receiving cavities 84, and the lower and side openings of the receiving cavities 84 are provided. The side wall of the rotating shaft 72 is provided with a fan-shaped connecting port 85, and the scraper 71 is respectively provided with two connecting channels 86, which are one-to-one corresponding to the two receiving cavities 84, and one end of the connecting channel 86 is in communication with the side close to the rotating side of the receiving cavity 84, and the other end of the connecting channel 86 is in communication with the rotating shaft 72 through the fan-shaped connecting port 85. The plug rod 73 is provided with a connecting cavity 87 in the inside, and the upper end of the connecting cavity 87 is open to communicate with the rotating shaft 72; and after the abutting plate 22 abuts against the filter screen 21, the upper end opening of the connecting cavity 87 abuts against the inner wall of the rotating shaft 72 to cut off the water flow into the receiving groove; one end of the water inlet pipe 82 is fixedly installed on the side wall of the plug rod 73 and communicates with the connecting cavity 87; the impurity removal pipe 81 is one-to-one corresponding to the receiving cavity 84, and the impurity removal pipe 81 is in communication with the side away from the rotating side of the receiving cavity 84; the reversing plate 83 slides through the scraper 71, and the sliding direction of the reversing plate 83 is perpendicular to the scraper 71 to close the connecting channel 86; the reversing plate 83 is provided with two through holes 88 corresponding to the connecting channel 86, and after the receiving cavity 84 abuts against the side wall of the sliding channel 11, the through holes 88 on the reversing plate 83 communicate with the two sides of the corresponding connecting channel 86; the third spring applies a spring force to the reversing plate 83 to push the reversing plate 83 to connect the connecting channel 86.

[0042] In the specific implementation, when the abutting plate 22 abuts against the filter screen 21 to form a closed cavity, the upper end opening of the connecting cavity 87 in the insertion rod 73 abuts against the inner wall of the rotating shaft 72 tightly, thereby cutting off the water supply completely. At this time, the scraper 71 rotates with the rotating shaft 72, and only relies on the swing of itself to stir the spraying waste water and chemical agents in the cavity, so as to promote the full mixing reaction of the two.

[0043] When the abutting plate 22 is separated from the filter screen 21, the upper end opening of the connecting cavity 87 is separated from the inner wall of the rotating shaft 72, the water supply channel is opened, the external water source enters the connecting cavity 87 of the insertion rod 73 through the water inlet pipe 82, enters the inside of the rotating shaft 72, and then enters the connecting channel 86 of the scraper 71 through the fan-shaped connecting port 85 of the side wall of the rotating shaft 72, and then flows into the containing cavity 84. Finally, the impurities collected in the containing cavity 84 are discharged through the impurity discharge pipe 81 away from the rotating side of the containing cavity 84 under the water flow thrust.

[0044] When the scraper 71 leaves the side wall of the sliding channel 11, the reversing plate 83 is reset by the third spring after losing the thrust, the through hole 88 is misaligned with the connecting channel 86 to close the channel, so as to avoid water leakage. At the same time, the fan-shaped connecting port 85 changes with the rotating angle of the rotating shaft 72, and always keeps the communication with the connecting channel 86, so as to ensure that the flushing time matches the rotating position of the scraper 71 accurately. The water cut-off design when the abutting plate 22 abuts against the filter screen 21 can prevent the water flow from entering the containing cavity 84 to interfere with the reaction in the stirring stage, so as to ensure that the stirring effect is pure and stable.

[0045] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, change, equivalent change and modification of the above embodiments, which does not depart from the technical solution of the present application, are still within the scope of the present application.

Claims

1. A wastewater treatment device for a spray painting production line, characterized in that, include: The housing has multiple sliding channels along its axial direction; The filtration mechanism includes a processing mechanism in each of the sliding channels to isolate the sliding channels and cooperate with the inner sidewall of the sliding channels to form a cavity for containing wastewater; the filtration mechanism is slidably installed inside the box. An elastic element applies an upward elastic force to the filtering mechanism; A water inlet pipe is coaxially and rotatably mounted on the housing, with the water inlet end of the water inlet pipe facing one of the sliding channels to add water to the sliding channel; A dosing mechanism is provided, with each dosing mechanism corresponding to a sliding channel; the dosing mechanism includes a gear pump and a pipeline, the gear pump being installed on the pipeline to add chemicals into the corresponding sliding channel through the pipeline; and The drive mechanism drives the gear pump and the water inlet pipe to rotate as the filter mechanism slides down.

2. The wastewater treatment device for a spray painting production line according to claim 1, characterized in that, The drive mechanism includes: a ratchet, a drive gear, a rack, ratchet teeth, a pull rope, a first spring, and a second spring; the ratchet is coaxially fixed to the water inlet pipe; the drive gear is coaxially fixed to the input shaft of the gear pump; the rack is slidably mounted on the housing along the tangential direction of the ratchet, and the rack meshes with the drive gear; the ratchet teeth are slidably mounted on the rack, and the sliding directions of the ratchet teeth and the rack are perpendicular to each other, with one end of the ratchet teeth abutting against the ratchet; the first spring applies a spring force toward the ratchet teeth to the ratchet teeth; one end of the pull rope is connected to one end of the rack, and the other end of the pull rope is connected to the filter mechanism; the second spring applies a spring force away from the pull rope to the rack.

3. The wastewater treatment device for a spray painting production line according to claim 2, characterized in that, The drive mechanism also includes a guide wheel; the guide wheel is rotatably mounted on the housing, and the pull rope abuts against the guide wheel.

4. The wastewater treatment device for a spray painting production line according to claim 1, characterized in that, The filtration mechanism includes: a filter screen, an abutment plate, a driving component, and a drain pipe; the filter screen and the abutment plate are slidably installed in a sliding channel along the axial direction of the housing, with the filter screen located above the abutment plate; the drain pipe is fixedly installed on the abutment plate, with one end of the drain pipe penetrating through the abutment plate; when the abutment plate abuts against the filter screen, it blocks the filter holes on the filter screen, and the filter screen blocks the drain pipe; the driving component connects the filter screen and the abutment plate to drive the filter screen and the abutment plate to slide relative to each other.

5. A wastewater treatment device for a spray painting production line according to claim 4, characterized in that, It also includes a cleaning mechanism that cleans impurities from the filter screen.

6. A wastewater treatment device for a spray painting production line according to claim 5, characterized in that, The cleaning mechanism includes: a scraper, a rotating shaft, and a transmission assembly; the sliding channel has a fan-shaped cross-section in the axial direction of the housing; the rotating shaft is rotatably mounted on the filter screen, and the rotating shaft coincides with the end point of the fan-shaped area; the scraper slides against the filter screen, and one end of the scraper is fixedly connected to the rotating shaft; the transmission assembly drives the rotating shaft to reciprocate.

7. A wastewater treatment device for a spray painting production line according to claim 6, characterized in that, The transmission assembly is located on the side of the abutment plate away from the filter screen. The transmission assembly includes: an insert rod, a swing rod, a disc, a cylindrical slider, a first bevel gear, a second bevel gear, a first pulley, a second pulley, a flat belt, and a friction wheel. The insert rod is coaxially and slidably inserted into the rotating shaft via a spline, and the insert rod is rotatably mounted on the abutment plate. The swing rod is parallel to the scraper, and one end of the swing rod is fixedly connected to the insert rod. A groove is formed along the length of the swing rod. The disc is rotatably mounted on the abutment plate, and the cylindrical slider... One end of the cylindrical slider is eccentrically fixed to one side of the disk, and the other end of the cylindrical slider extends into the groove; the first bevel gear is coaxially fixed to the disk, and the second bevel gear is rotatably mounted on the abutment plate, and the second bevel gear meshes with the first bevel gear; the first pulley is coaxially fixed to the second bevel gear, and the second pulley is rotatably mounted on the abutment plate, and the first pulley and the second pulley are connected by a flat belt; the friction wheel is coaxially fixed to the second pulley, and the friction wheel slides against the inner wall of the sliding channel.

8. A wastewater treatment device for a spray painting production line according to claim 7, characterized in that, It also includes a waste removal mechanism, which comprises a waste removal pipe, a water inlet pipe, a reversing plate, and a third spring; receiving cavities are respectively opened on opposite sides in the width direction of the scraper, and the receiving cavities are open at the bottom and side; a fan-shaped connection port is opened on the side wall of the rotating shaft; two connection channels are respectively opened on the scraper, and the two connection channels are respectively arranged one-to-one with the two receiving cavities, and one end of the connection channel is connected to the side of the receiving cavity near the rotation, and the other end of the connection channel is connected to the inside of the rotating shaft through the fan-shaped connection port; a connecting cavity is opened in the insert rod, and the upper end of the connecting cavity is open to communicate with the inside of the rotating shaft; and after the abutment plate abuts against the filter screen, the upper end of the connecting cavity is open. The water inlet pipe abuts against the inner wall of the rotating shaft to prevent water from entering the receiving groove; one end of the water inlet pipe is fixedly installed on the side wall of the insert rod and communicates with the connecting cavity; the waste discharge pipe is arranged one-to-one with the receiving cavity, and the waste discharge pipe communicates with the side of the receiving cavity away from rotation; the reversing plate slides through the scraper, and the sliding direction of the reversing plate is perpendicular to the scraper to close the connecting channel; the reversing plate has two through holes corresponding to the connecting channel, and after the receiving cavity abuts against the side wall of the sliding channel, it pushes the through holes on the reversing plate to connect the two sides of the corresponding connecting channel; the third spring applies a spring force to the reversing plate to push the reversing plate to the connecting channel.

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