CN108722754B

CN108722754B - Paint recovery device

Info

Publication number: CN108722754B
Application number: CN201810816604.1A
Authority: CN
Inventors: 姚胜红; 吴文韬; 俞家胜
Original assignee: Tongling Ferrous Construction & Installation Steel Structure Co ltd
Current assignee: Tongling Ferrous Construction & Installation Steel Structure Co ltd
Priority date: 2018-07-24
Filing date: 2018-07-24
Publication date: 2023-09-22
Anticipated expiration: 2038-07-24
Also published as: CN108722754A

Abstract

The invention relates to a paint recovery device, which comprises a roller, a cloth pasting sponge, a net pulling, a paint diluent temporary storage groove, a scraping plate and a first recovery groove, wherein the cloth pasting sponge is arranged horizontally, the cloth pasting sponge is wound around the roller, the paint diluent temporary storage groove is arranged at the left upper part of the roller, the scraping plate is arranged below the roller, the first recovery groove is arranged below the scraping plate, the cloth pasting sponge comprises a sponge layer and a non-woven fabric layer, the net pulling comprises a third inclined section, a third transition section and a third sagging section from top to bottom, the third transition section is arranged at the outer side of the second transition section, the third sagging section is arranged at the right side of the second sagging section, and an iron plate is fixedly arranged at the lower end of the third sagging section; the bottom of paint diluent temporary storage groove still is provided with the dropping liquid device, is provided with the second recovery tank under the iron plate, and the below of second recovery tank is provided with the electro-magnet. The paint recovery device can effectively recover the overspray paint, the waste paint amount is less, the paint utilization rate is high, the recovered paint can be used without impurity removal, and the production cost is effectively reduced.

Description

Paint recovery device

Technical Field

The invention relates to a paint recovery device, which belongs to an auxiliary machining device for mechanical accessories.

Background

In the construction and machining fields, it is often necessary to spray rust inhibitive paint on the surface of a metal workpiece. The paint spray gun can spray the spray liquid on the workpiece uniformly, conveniently and rapidly, but the utilization rate of the paint is low, and the paint which can be really attached to the workpiece only accounts for 30% -40% of all the sprayed paint, namely, 60% -70% of atomized paint is actually diffused in the air, so that a large amount of resources are wasted.

At present, the conventional water curtain type paint mist purifying device is commonly adopted in the paint spraying process in various industries, and the water curtain type paint mist purifying device forms jet type overflow by utilizing a water pump through a water pipe, a water curtain plate and a water spray nozzle, and forms water mist in a waterfall state, so that the sprayed paint mist in the spraying process can be adsorbed by water and is accumulated in a sewage tank as soon as the sprayed paint mist collides with the water mist. Although the atomized paint is recovered, the recovered paint contains a large amount of water, and a lot of manpower and material resources and material cost are required for removing the water in the paint. If the paint diluent is used instead of water, the paint diluent is usually an ester-and ketone-containing solvent, and the solvent is easy to volatilize, and the evaporation of the solvent is accelerated when the paint diluent forms mist; the use of paint dilutions instead of water typically evaporates 40% -70% and the cost of paint dilutions is much higher than that of water, thus significantly increasing recovery costs.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention provides a paint recovery device, which has the following specific technical scheme:

the paint recovery device comprises a roller, a cloth pasting sponge, a net, a paint diluent temporary storage groove, a scraping plate and a first recovery groove, wherein the cloth pasting sponge, the net is wound around the roller, the paint diluent temporary storage groove is positioned at the upper left of the roller, the scraping plate is positioned below the roller, the first recovery groove is positioned below the scraping plate, a first vertical plate and a bottom plate which inclines downwards are arranged at the bottom of the paint diluent temporary storage groove, the upper end of the first vertical plate is fixedly connected with the bottom of the paint diluent temporary storage groove, the bottom plate is arranged between the first vertical plate and the roller, and the upper end of the bottom plate is fixedly connected with the lower end of the first vertical plate; the cloth pasting sponge comprises a sponge layer and a non-woven fabric layer, wherein the non-woven fabric layer sequentially comprises a first inclined section positioned above a roller, a first transition section clung to the roller and a first sagging section positioned on the right side of the roller from top to bottom, the upper end of the first inclined section is positioned above a bottom plate, the upper end of the first inclined section is fixedly connected with the bottom plate, and a counterweight rod is fixedly arranged at the lower end of the first sagging section; the sponge layer sequentially comprises a second inclined section positioned above the first inclined section, a second transition section positioned outside the first transition section and a second sagging section positioned on the right side of the first sagging section from top to bottom, wherein the second inclined section is fixedly connected with the first inclined section, and the lower end of the second sagging section is fixedly connected with the counterweight rod; the net comprises a third inclined section positioned above the second inclined section, a third transition section positioned outside the second transition section and a third sagging section positioned on the right side of the second sagging section from top to bottom, wherein the third inclined section is clung to the second inclined section and is fixedly connected with the second inclined section, an iron plate is fixedly arranged at the lower end of the third sagging section, and the iron plate is arranged below the counterweight rod; the bottom of the paint diluent temporary storage groove is also provided with a liquid dropping device, and the liquid dropping device is arranged above the third inclined section; a second recovery groove is formed right below the iron plate, an electromagnet is arranged below the second recovery groove, and the electromagnet is fixedly connected with the bottom of the second recovery groove; the upper end of the scraping plate is clung to the side wall of the roller, a second vertical plate is arranged below the scraping plate, the upper end of the second vertical plate is fixedly connected with the lower end of the scraping plate, a connecting rod is arranged between the lower end of the second vertical plate and the inner wall of the first recovery groove, one end of the connecting rod is fixedly connected with the lower end of the second vertical plate, and the other end of the connecting rod is fixedly connected with the inner wall of the first recovery groove.

As the improvement of above-mentioned technical scheme, the dropping device includes butterfly valve, both ends all confined violently pipe, the butterfly valve is located the top of violently pipe, the input of butterfly valve and the inner chamber intercommunication in the paint diluent groove of keeping in, the output of butterfly valve and the inner chamber intercommunication of violently pipe, the axis of violently pipe is parallel with the axis of cylinder, the downside of violently pipe is provided with a plurality of first through-holes.

As an improvement of the technical scheme, the stirring paddle is arranged in the first recovery tank and below the second vertical plate, and the stirring paddle is arranged below the connecting rod.

As an improvement of the technical scheme, a liquid discharge valve is arranged outside the first recovery tank, and the input end of the liquid discharge valve is communicated with the inner cavity of the first recovery tank.

As an improvement of the technical scheme, the included angle between the bottom plate and the first vertical plate is alpha, and alpha is more than or equal to 105 degrees and less than or equal to 120 degrees.

As an improvement of the technical scheme, a liquid discharge pipe is arranged below the second recovery tank, a liquid discharge hole is formed in the bottom of the second recovery tank, the upper end of the liquid discharge pipe is communicated with the liquid discharge hole, and the lower end of the liquid discharge pipe is communicated with the inner cavity of the first recovery tank.

As an improvement of the above technical solution, the side wall of the second inclined section is provided with a plurality of second through holes, and the second through holes are parallelograms.

As an improvement of the technical scheme, annular baffles are respectively and fixedly arranged at the front end and the rear end of the roller.

The paint recovery device can effectively recover the over-sprayed paint, has less wasted paint quantity and high paint utilization rate, can be used without removing impurities, and effectively reduces the production cost.

Drawings

FIG. 1 is a schematic view of a paint recovery device according to the present invention;

FIG. 2 is a schematic diagram showing the connection of the paint thinner temporary storage tank, the first vertical plate, the bottom plate and the dropping device;

FIG. 3 is a schematic diagram of the connection of the cloth sticking sponge, the net, the bottom plate and the roller;

FIG. 4 is a schematic diagram showing the connection between the dropping device and the paint diluent temporary storage tank;

FIG. 5 is a schematic view of the second sloped section of the present invention not pulled by the third sloped section;

FIG. 6 is a schematic view of the second angled section of the present invention pulled by a third angled section;

fig. 7 is a schematic diagram of the connection between the drum and the baffle according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1 to 4, the paint recycling device comprises a roller 10, a cloth pasting sponge, a net 30, a paint diluent temporary storage groove 40, a scraper 110 and a first recycling groove 60, wherein the roller 10 is horizontally arranged, the cloth pasting sponge is wound around the roller 10, the paint diluent temporary storage groove 40 is positioned at the left upper part of the roller 10, the scraper 110 is positioned below the roller 10, the first recycling groove 60 is positioned below the scraper 110, a first vertical plate 41 and a bottom plate 42 which is inclined downwards are arranged at the bottom of the paint diluent temporary storage groove 40, the upper end of the first vertical plate 41 is fixedly connected with the bottom of the paint diluent temporary storage groove 40, the bottom plate 42 is arranged between the first vertical plate 41 and the roller 10, and the upper end of the bottom plate 42 is fixedly connected with the lower end of the first vertical plate 41; the cloth pasting sponge comprises a sponge layer 20 and a non-woven fabric layer 21, wherein the non-woven fabric layer 21 sequentially comprises a first inclined section 211 positioned above a roller 10, a first transition section 212 clung to the roller 10 and a first sagging section 213 positioned on the right side of the roller 10 from top to bottom, the upper end of the first inclined section 211 is positioned above a bottom plate 42, the upper end of the first inclined section 211 is fixedly connected with the bottom plate 42, the upper end of the first inclined section 211 can be fixedly connected with the bottom plate 42 by adopting glue, and the lower end of the first sagging section 213 is fixedly provided with a weight balancing rod 22; the sponge layer 20 sequentially comprises a second inclined section 201 positioned above the first inclined section 211, a second transition section 202 positioned outside the first transition section 212 and a second drooping section 203 positioned on the right side of the first drooping section 213 from top to bottom, wherein the second inclined section 201 is fixedly connected with the first inclined section 211, the second inclined section 201 can be fixedly connected with the first inclined section 211 by adopting glue, the lower end of the second drooping section 203 is fixedly connected with the counterweight rod 22, and the lower end of the second drooping section 203 can be fixedly connected with the counterweight rod 22 by adopting glue; the pull net 30 sequentially comprises a third inclined section 301 positioned above the second inclined section 201, a third transition section 302 positioned outside the second transition section 202 and a third sagging section 303 positioned on the right side of the second sagging section 203 from top to bottom, wherein the third inclined section 301 is clung to the second inclined section 201 and the third inclined section 301 is fixedly connected with the second inclined section 201, the third inclined section 301 and the second inclined section 201 can be fixedly connected by adopting glue, an iron plate 31 is fixedly arranged at the lower end of the third sagging section 303, and the iron plate 31 is arranged below the weight rod 22; the bottom of the paint diluent temporary storage groove 40 is also provided with a liquid dropping device, and the liquid dropping device is arranged above the third inclined section 301; a second recovery groove 70 is arranged right below the iron plate 31, an electromagnet 71 is arranged below the second recovery groove 70, and the electromagnet 71 is fixedly connected with the bottom of the second recovery groove 70; the upper end of scraper blade 110 hugs closely the lateral wall of cylinder 10, the below of scraper blade 110 is provided with second riser 111, the upper end of second riser 111 and the lower extreme fixed connection of scraper blade 110, be provided with connecting rod 52 between the inner wall of second riser 111 and first recovery tank 60, the one end and the lower extreme fixed connection of second riser 111 of connecting rod 52, the other end and the inner wall fixed connection of first recovery tank 60 of connecting rod 52.

The front, back, left, right, up, down are all described herein with respect to fig. 1. The spray gun 80 for spraying paint is positioned at the left side of the roller 10, the workpiece 90 to be sprayed is positioned between the spray gun 80 and the roller 10, a supporting table 91 is arranged below the workpiece 90 to be sprayed, the workpiece 90 to be sprayed is placed above the supporting table 91, and a bench vice can be used for fixing the workpiece 90 to be sprayed and the supporting table 91. Wherein the spray gun 80 and the workpiece 90 to be sprayed are both located below the first inclined section 211. The drum 10 is horizontally disposed, i.e., the central axis of the drum 10 is parallel to the horizontal plane. The glue in this embodiment may be epoxy resin AB glue.

When the paint gun 80 performs paint spraying operation, the paint recovery device synchronously starts to operate, and the operation process of the paint recovery device is as follows:

1) The roller 10 rotates, in this embodiment, the roller 10 rotates anticlockwise, the rotation speed of the roller 10 is 7-20 rpm, and the first sagging section 213 and the second sagging section 203 keep sagging under the action of the weight lever 22; the weight 22 is made of metal, and in order to avoid the weight 22 being attracted by the magnet, the weight 22 may be made of non-ferromagnetic metal materials, such as aluminum, copper, lead, and corresponding alloys, which are not attracted by the magnet.

2) Since the bottom plate 42 is in a downward inclined structure, and the upper end of the first inclined section 211 is tightly attached to the bottom plate 42, the first inclined section 211 is tightened, and thus the first inclined section 211 is also in a downward inclined structure, and similarly, the second inclined section 201 and the third inclined section 301 are also in a downward inclined structure; the first transition section 212 is abutted against the roller 10 so that the cross section of the first transition section 212 is arc-shaped, the second transition section 202 is abutted against the first transition section 212, the third transition section 302 is abutted against the second transition section 202, and the third transition section 302 is not fixed with the second transition section 202; the iron plate 31 corresponds to a weight, and the third hanging-down section 303 is in a hanging-down state by the iron plate 31, and the third hanging-down section 303 and the second hanging-down section 203 are not fixed. The first sagging section 213 and the second sagging section 203 remain sagged even though the drum 10 rotates counterclockwise by the weight lever 22, the first transition section 212 is closely attached to the drum 10, and the first inclined section 211 is in a downwardly inclined state.

3) The paint diluent is stored in the paint diluent temporary storage groove 40, a dropping device is started, the paint diluent in the paint diluent temporary storage groove 40 drops to a cloth-sticking sponge above the bottom plate 42 through the dropping device, the net 30 does not obstruct the paint diluent from dropping to be absorbed by the sponge layer 20 due to the mesh, the sponge layer 20 can absorb the paint diluent with 5-8 times of the self weight, and the non-woven fabric layer 21 is wetted by the paint diluent absorbed by the sponge layer 20; the atomized paint sprayed by the paint spray gun 80, wherein a part of atomized paint is sprayed to a workpiece 90 to be painted for painting, another part of atomized paint overflows, and most of the overflowed atomized paint continuously splashes rightwards under the action of inertia so as to fall on the side wall of the roller 10, is accumulated on the side wall of the roller 10 and then flows down in a stranding way along the rotating roller 10; a further portion of the mist paint accumulates on the surface of the first angled section 211 after contacting the first angled section 211.

The dropping device comprises a butterfly valve 50 and a transverse tube 51 with two closed ends, the butterfly valve 50 is located above the transverse tube 51, the input end of the butterfly valve 50 is communicated with the inner cavity of the paint diluent temporary storage groove 40, the output end of the butterfly valve 50 is communicated with the inner cavity of the transverse tube 51, the central axis of the transverse tube 51 is parallel to the central axis of the roller 10, and a plurality of first through holes 511 are formed in the lower side of the transverse tube 51. The working process of the liquid dropping device is as follows: the butterfly valve 50 is opened and the opening degree of the butterfly valve 50 is controlled so that the paint thinner in the paint thinner temporary storage tank 40 flows to the inner cavity of the transverse pipe 51 through the butterfly valve 50 and then drops downwards from the first through holes 511, and the drops of the paint thinner dropped downwards from the single first through hole 511 drop downwards at a rate of 60 to 110 drops/minute. The paint thinner droplets falling downward from the first through holes 511 are absorbed by the second inclined sections 201.

4) Energizing the electromagnet 71, wherein the electromagnet 71 is repeatedly energized for 1-2 seconds, de-energized for 8-15 seconds and energized for 1-2 seconds; when the electromagnet 71 is electrified, the electromagnet 71 generates magnetic force, the magnetic force generated by the electromagnet 71 can absorb the iron plate 31 to move downwards, the iron plate 31 moves downwards to drive the lower end of the pull net 30 to move, in the pull net 30, the third inclined section 301 is fixedly connected with the second inclined section 201, at the moment, under the action of the pulling force generated by the iron plate 31, the third inclined section 301 pulls the second inclined section 201, as shown in fig. 6, in the second inclined section 201, the sponge is pulled and extruded by the third inclined section 301 to force the paint diluent in the sponge to flow out, the paint diluent which flows out can pass through the first inclined section 211 under the action of gravity to dilute the paint accumulated on the lower surface of the first inclined section 211, so that the paint is prevented from solidifying, the viscosity of the paint on the lower surface of the first inclined section 211 is reduced to flow to the side wall of the roller 10 along the first inclined section 211 under the action of gravity, and finally the paint is converged with the side wall of the roller 10 to flow down in a strand. In the process, as the surface of the woven cloth, the knitted cloth, the woven cloth, the sponge and the like is rough and porous, atomized paint is adhered to the surface of the woven cloth, the knitted cloth, the sponge and the like, and is not easy to flow down in a stranding way; the surface of the non-woven fabric is smoother than that of woven fabric, knitted fabric, woven fabric, sponge and the like, so that paint attached to the surface of the non-woven fabric is easy to flow down in a stranding manner under the action of gravity. Since the sponge is capable of absorbing and storing the paint diluent, which makes the paint diluent less prone to evaporation, in the present invention, the paint diluent does not evaporate more than 9%. Further, a spring 33 is disposed between the upper end of the third inclined section 301 and the first riser 41, one end of the spring 33 is fixedly connected to the upper end of the third inclined section 301, and the other end of the spring 33 is fixedly connected to the first riser 41. When the electromagnet 71 is energized, the upper end of the third inclined section 301 is pulled to move downward, which causes the spring 33 to be stretched; when the electromagnet is de-energized, the tension created by the stretched spring 33 can urge the second angled section 201 to return to its original position, as shown in fig. 5. Further, the side wall of the second inclined section 201 is provided with a plurality of second through holes 2011, and the second through holes 2011 are parallelogram. The parallelogram shaped second through-hole 2011 allows the second angled section 201 to deform easily when pulled and squeezed by the third angled section 301, thereby allowing the second angled section 201 to squeeze out paint diluent easily.

5) The accumulated paint on the side wall of the roller 10 flows downwards along the side wall of the roller 10 in a strand, the upper end of the scraping plate 110 is closely attached to the side wall of the roller 10, the scraping plate 110 is arranged in a downward inclined mode, for example, the included angle between the scraping plate 110 and the second vertical plate 111 is an obtuse angle, and the scraping plate 110 can scrape off the strand of paint on the side wall of the roller 10 and then flows into the first recovery groove 60 along the scraping plate 110 and the second vertical plate 111. Most of the paint on the side wall of the roller 10 is scraped off by the scraping of the scraper 110; even a trace amount of residual paint is eventually wiped off by the first transition section 212, thereby avoiding the presence of paint residue on the side walls of the roller 10 that is not easily removed, and thus ensuring the quality of the subsequent recovered paint. The second transition section 202 can timely replenish the first transition section 212 with sufficient paint diluent so that the first transition section 212 can wipe the side walls of the drum 10 clean. During the powering up and down of the electromagnet 71, a portion of the mixture containing paint and paint thinner flows down the first drop leg 213, the second drop leg 203, and the third drop leg 303 into the second recovery tank 70 for temporary storage.

Further, a drain pipe 72 is disposed below the second recovery tank 70, a drain hole is disposed at a bottom of the second recovery tank 70, an upper end of the drain pipe 72 is communicated with the drain hole, and a lower end of the drain pipe 72 is communicated with an inner cavity of the first recovery tank 60. The mixed liquid recovered in the second recovery tank 70 flows to the first recovery tank 60 through the drain pipe 72. Further, a stirring paddle 61 is provided inside the first recovery tank 60, the stirring paddle 61 is provided below the second riser 111, and the stirring paddle 61 is provided below the link 52. The stirring paddle 61 is driven by a servo motor provided below the first recovery tank 60. The stirring paddle 61 is turned on so that the paint recovered in the first recovery tank 60 and the mixed liquid are stirred and mixed into recovered paint. The density of the reclaimed paint can be measured using a densitometer, after which a new paint or paint diluent is replenished according to the formulation to enable the reclaimed paint to be reused. In the recovery process of paint, the non-woven fabric does not pollute the paint and cannot introduce impurities well. Generally, a paint spraying workshop belongs to a dust-free workshop, and the effect of paint spraying is prevented from being influenced by excessive dust.

Further, a drain valve 62 is disposed outside the first recovery tank 60, and an input end of the drain valve 62 is in communication with an inner cavity of the first recovery tank 60. After the reclaimed paint is stirred, the liquid discharge valve 62 can be opened, and the reclaimed paint in the first reclaiming tank 60 is intensively discharged to a specified container for temporary storage through the liquid discharge valve 62.

The greater the degree of inclination of the first inclined section 211, the strands of paint flowing downward along the first inclined section 211 are likely to drop downward off the lower surface of the first inclined section 211. The smaller the degree of inclination of the first inclined section 211, the less likely the strands of paint flowing down the first inclined section 211 flow down, and the slower the flow rate. Accordingly, it is necessary to control the downward inclination angle of the first inclined section 211. Further, the angle between the bottom plate 42 and the first riser 41 is alpha, and alpha is 105 DEG-120 deg. Since the upper end of the first inclined section 211 is closely attached to the bottom plate 42, the first inclined section 211 is maintained in a parallel state with the bottom plate 42, which makes it easy for paint on the lower surface of the first inclined section 211 to flow downward in a strand.

Further, as shown in fig. 7, annular baffles 11 are respectively fixed at the front and rear ends of the drum 10. The baffle 11 can prevent the cloth sticking sponge and the net 30 from deviating, and can prevent paint on the side wall of the roller 10 from splashing on the front end face and the rear end face of the roller 10.

In the above embodiment, the paint recovery device can effectively recover the over-sprayed paint, so that the total amount of the wasted paint is not more than 21%, the wasted paint comprises the paint which is not recovered in the air and the paint which falls on the ground or the table surface of the supporting table 91, the recovered paint can be used without removing impurities, the utilization rate of the paint is high, and the production cost is effectively reduced. The cloth sticking sponge and the net 30 belong to easy-to-wear parts, and need to be replaced periodically, and the replacement operation is simple and convenient.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. A paint recovery device, characterized in that: the automatic cleaning device comprises a roller (10) which is horizontally arranged, a cloth pasting sponge which winds the roller (10), a net (30), a paint diluent temporary storage groove (40) which is positioned at the left upper part of the roller (10), a scraper (110) which is positioned below the roller (10) and a first recovery groove (60) which is positioned below the scraper (110), wherein a first vertical plate (41) and a bottom plate (42) which is inclined downwards are arranged at the bottom of the paint diluent temporary storage groove (40), the upper end of the first vertical plate (41) is fixedly connected with the bottom of the paint diluent temporary storage groove (40), the bottom plate (42) is arranged between the first vertical plate (41) and the roller (10), and the upper end of the bottom plate (42) is fixedly connected with the lower end of the first vertical plate (41); the cloth pasting sponge comprises a sponge layer (20) and a non-woven fabric layer (21), wherein the non-woven fabric layer (21) sequentially comprises a first inclined section (211) positioned above a roller (10), a first transition section (212) clung to the roller (10) and a first sagging section (213) positioned on the right side of the roller (10) from top to bottom, the upper end of the first inclined section (211) is positioned above a bottom plate (42), the upper end of the first inclined section (211) is fixedly connected with the bottom plate (42), and a weight balancing rod (22) is fixedly arranged at the lower end of the first sagging section (213); the sponge layer (20) sequentially comprises a second inclined section (201) positioned above the first inclined section (211), a second transition section (202) positioned outside the first transition section (212) and a second sagging section (203) positioned on the right side of the first sagging section (213) from top to bottom, the second inclined section (201) is fixedly connected with the first inclined section (211), and the lower end of the second sagging section (203) is fixedly connected with the balance weight rod (22); the pull net (30) sequentially comprises a third inclined section (301) positioned above the second inclined section (201), a third transition section (302) positioned outside the second transition section (202) and a third sagging section (303) positioned on the right side of the second sagging section (203) from top to bottom, the third inclined section (301) is tightly attached to the second inclined section (201) and the third inclined section (301) is fixedly connected with the second inclined section (201), an iron plate (31) is fixedly arranged at the lower end of the third sagging section (303), and the iron plate (31) is arranged below the weight balancing rod (22); the bottom of the paint diluent temporary storage groove (40) is also provided with a liquid dropping device, and the liquid dropping device is arranged above the third inclined section (301); a second recovery groove (70) is formed right below the iron plate (31), an electromagnet (71) is arranged below the second recovery groove (70), and the electromagnet (71) is fixedly connected with the bottom of the second recovery groove (70); the upper end of the scraper blade (110) is tightly attached to the side wall of the roller (10), a second vertical plate (111) is arranged below the scraper blade (110), the upper end of the second vertical plate (111) is fixedly connected with the lower end of the scraper blade (110), a connecting rod (52) is arranged between the lower end of the second vertical plate (111) and the inner wall of the first recovery groove (60), one end of the connecting rod (52) is fixedly connected with the lower end of the second vertical plate (111), and the other end of the connecting rod (52) is fixedly connected with the inner wall of the first recovery groove (60);

the liquid dropping device comprises a butterfly valve (50) and a transverse tube (51) with two closed ends, the butterfly valve (50) is positioned above the transverse tube (51), the input end of the butterfly valve (50) is communicated with the inner cavity of the paint diluent temporary storage groove (40), the output end of the butterfly valve (50) is communicated with the inner cavity of the transverse tube (51), the central axis of the transverse tube (51) is parallel to the central axis of the roller (10), and a plurality of first through holes (511) are formed in the lower side of the transverse tube (51);

the inside of first recovery groove (60) is provided with stirring rake (61), stirring rake (61) set up in the below of second riser (111), stirring rake (61) set up in the below of connecting rod (52).

2. A paint recovery apparatus according to claim 1, wherein: the outside of first recovery groove (60) is provided with flowing back valve (62), the input of flowing back valve (62) communicates with the inner chamber of first recovery groove (60).

3. A paint recovery apparatus according to claim 1, wherein: the included angle between the bottom plate (42) and the first vertical plate (41) is alpha, and alpha is more than or equal to 105 degrees and less than or equal to 120 degrees.

4. A paint recovery apparatus according to claim 1, wherein: the lower part of second recovery groove (70) is provided with fluid-discharge tube (72), the tank bottom of second recovery groove (70) is provided with the apopore, the upper end and the apopore intercommunication of fluid-discharge tube (72), the lower extreme and the inner chamber intercommunication of first recovery groove (60) of fluid-discharge tube (72).

5. A paint recovery apparatus according to claim 1, wherein: the side wall of the second inclined section (201) is provided with a plurality of second through holes (2011), and the second through holes (2011) are parallelograms.

6. A paint recovery apparatus according to claim 1, wherein: annular baffles (11) are respectively and fixedly arranged at the front end and the rear end of the roller (10).