Cleaning waste liquid recovery system of steel coil jet printing machine

Abstract

The invention relates to the field of steel coil jet printing machines, in particular to a steel coil jet printing machine cleaning waste liquid recovery system which can recycle cleaning waste liquid of a steel coil jet printing machine and comprises a spray head, a paint discharging barrel and a cleaning liquid discharging barrel. The spray head is communicated with a cleaning liquid discharging barrel through a cleaning liquid conveying pipe, the cleaning device comprises a separator, the separator comprises a deposition cup and a filter cup, the filter cup is arranged above the deposition cup, the deposition cup and the filter cup are communicated, and a filter membrane used for filtering paint is arranged between the deposition cup and the filter cup. The deposition cup is communicated with the spray head through a waste liquid inlet formed in the side wall of the deposition cup, the bottom of the deposition cup is communicated with the paint discharging barrel through a paint backflow pipe, and the side wall of the filter cup is communicated with the cleaning liquid discharging barrel through a cleaning liquid backflow pipe. The method is particularly suitable for the steel coil jet printing machine cleaning waste liquid recovery process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steel coil marking machine, in particular to a steel coil marking machine cleaning waste liquid recycling system. BACKGROUND

[0002] Finished steel coil needs to be sprayed by oil cold spray steel coil marking machine after production, and then the steel coil number, weight, specification and other marks of finished steel coil are sprayed on the specified area. The working mode of the existing steel coil marking machine is that the paint delivery pump first sucks the paint in the paint discharge barrel, and cooperates with the air pressure to spray out through the nozzle. The nozzle is connected with the machine arm, and the machine arm drives the nozzle to move according to the dynamic motion track specified by the program, so that the paint is sprayed out, and then the required numbers or characters appear on the surface of the finished steel coil. After each steel coil marking is completed and the nozzle returns to the initial origin, the cleaning liquid delivery pump then sucks the cleaning liquid in the cleaning liquid discharge barrel and sprays it out from the nozzle, so as to clean the nozzle and avoid the nozzle being blocked by the paint. After the nozzle is cleaned by the cleaning liquid, compressed air is sprayed out from the nozzle again, and the residues in the nozzle are blown out. The cleaning waste liquid obtained in the process of cleaning the nozzle is collected in the collecting barrel through the waste liquid collecting pipe. As the cleaning waste liquid in the collecting barrel gradually fills up, it is finally collected and treated harmlessly.

[0003] The nozzle cleaning in the above-mentioned manner has the following problems: first, a large amount of cleaning liquid is consumed in the process of cleaning the nozzle, resulting in high cost. Second, the treatment process of the cleaning waste liquid formed after the cleaning liquid is washed is relatively troublesome, and if the cleaning waste liquid cannot be treated in time, it will continue to volatilize during storage, affecting the air quality of the factory area. At present, there is no related scheme for recycling the cleaning waste liquid of the steel coil marking machine. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a steel coil marking machine cleaning waste liquid recycling system for recycling the cleaning waste liquid of the steel coil marking machine.

[0005] The technical scheme adopted by the present application to solve the technical problem is that the steel coil marking machine cleaning waste liquid recycling system comprises a nozzle, a paint discharge barrel and a cleaning liquid discharge barrel, the nozzle is communicated with the paint discharge barrel through a paint delivery pipe, the nozzle is communicated with the cleaning liquid discharge barrel through a cleaning liquid delivery pipe, and the system comprises a separator, the separator comprises a sedimentation cup and a filter cup, the filter cup is arranged above the sedimentation cup, and the sedimentation cup and the filter cup are communicated. A filter membrane for filtering out paint is arranged between the sedimentation cup and the filter cup. The sedimentation cup and the nozzle are communicated through a waste liquid inlet arranged on the side wall of the sedimentation cup. The bottom of the sedimentation cup and the paint discharge barrel are communicated through a paint backflow pipe. The side wall of the filter cup and the cleaning liquid discharge barrel are communicated through a cleaning liquid backflow pipe.

[0006] Further, a filter membrane is arranged at the inlet of the bottom of the deposition cup, the filter membrane is arranged along the horizontal direction, and the horizontal plane of the waste liquid inlet is lower than the horizontal plane of the filter membrane.

[0007] Further, the deposition cup and the filter cup are detachably connected through the fastening threads.

[0008] Further, a sealing ring is arranged between the sidewall of the bottom of the filter cup and the inner wall of the deposition cup.

[0009] Further, a liquid storage cavity is arranged, the liquid storage cavity is formed by the fastening threads, the filter cup, the deposition cup and the sealing ring, the liquid storage cavity is communicated with the filter cup inner cavity of the filter cup through the flow-through hole, and the cleaning liquid outlet of the liquid storage cavity is communicated with the cleaning liquid discharge barrel through the cleaning liquid return pipe.

[0010] Further, the flow-through hole is uniformly arranged on the filter cup along the rotation axis direction of the filter cup.

[0011] Further, the bottom of the deposition cup is funnel-shaped, and the paint outlet of the bottom of the deposition cup is communicated with the paint return pipe.

[0012] Further, an electromagnetic valve is arranged between the paint outlet and the bottom of the deposition cup.

[0013] Further, a collecting funnel is arranged, the collecting funnel is arranged below the spray head, the opening of the collecting funnel faces the spray head, and the bottom of the collecting funnel is communicated with the waste liquid inlet.

[0014] Further, the filter membrane is sponge or filter cotton.

[0015] The beneficial effects of the present application are: 1. After the cleaning waste liquid is input into the sedimentation cup, the cleaning waste liquid will contact the filter membrane as the liquid level in the sedimentation cup rises. Since the cleaning liquid can pass through the filter membrane, the cleaning liquid can be collected in the filter cup, while the paint is filtered by the filter membrane and retained in the sedimentation cup, thereby realizing the separation of paint and cleaning liquid in the cleaning waste liquid. Subsequently, the separated paint and cleaning liquid are transported into the paint discharge barrel and the cleaning liquid discharge barrel respectively, realizing the recycling of paint and cleaning liquid in the cleaning waste liquid, greatly reducing the consumption of cleaning liquid and paint, reducing costs, and effectively improving air quality. 2. The sedimentation cup and the filter cup are detachably connected through fastening threads, which can realize the replacement and internal cleaning of the sedimentation cup and the filter cup, reducing the maintenance difficulty of the sedimentation cup and the filter cup. 3. By constructing the liquid storage cavity, the filtered cleaning liquid can be collected and transported to the cleaning liquid discharge barrel, improving the recycling efficiency of the cleaning liquid. 4. In actual use, since the filter membrane is arranged in the horizontal direction, the paint filtered by the filter membrane is initially distributed on the bottom surface of the filter membrane. Subsequently, due to the action of gravity, the paint originally distributed on the bottom surface of the filter membrane is more likely to sink to the sedimentation cup. This allows the filter membrane to be less likely to adhere and accumulate paint, and the filter membrane can maintain permeability for a long time and is less likely to be blocked. The present application is especially suitable for use in the cleaning waste liquid recycling process of a steel coil printing machine. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of an embodiment of the present application.

[0017] Figure 2 is a structural schematic diagram of the separator of the present application.

[0018] Figure 3 is a schematic diagram of the cleaning waste liquid flowing into the collection barrel through the waste liquid collection pipe in the existing scheme.

[0019] In the figure, the labels are: spray head 1, machine arm 2, paint discharge barrel 3, paint delivery pump 4, paint delivery pipe 5, cleaning liquid discharge barrel 6, cleaning liquid delivery pump 7, cleaning liquid delivery pipe 8, collection funnel 9, waste liquid collection pipe 91, separator 10, waste liquid inlet 101, sedimentation cup 102, filter cup 103, cleaning liquid outlet 104, flow-through hole 105, sealing ring 106, paint outlet 108, fastening thread 109, filter membrane 11, electromagnetic valve 13, cleaning liquid return pipe 14, paint return pipe 141, collection barrel 15, filter cup inner cavity A, liquid storage cavity B. DETAILED DESCRIPTION

[0020] The present application will be further described below with reference to the accompanying drawings.

[0021] As Figure 1 and Figure 2The embodiment of the steel coil inkjet printer cleaning waste liquid recovery system is shown. The end of the machine arm 2 is fixedly provided with the nozzle 1. The machine arm 2 drives the nozzle 1 to move along the dynamic motion track as specified in the program. In the process of movement, the nozzle 1 sprays paint, thereby spraying the required numbers or characters on the surface of the finished steel coil, and realizing the marking of the steel coil number, weight and specification of the finished steel coil. Specifically, when the nozzle 1 sprays paint, the paint delivery pump 4 is started to suck the paint in the paint discharge barrel 3 out and deliver it to the nozzle 1 through the paint delivery pipe 5 for spraying. After the nozzle 1 completes the action of spraying paint, the paint delivery pump 4 is stopped. When the nozzle 1 needs to be cleaned, the nozzle 1 is moved to the directly above the opening of the collecting funnel 9 by the machine arm 2, and then the cleaning liquid delivery pump 7 is started to suck the cleaning liquid in the cleaning liquid discharge barrel 6 out and deliver it to the nozzle 1 through the cleaning liquid delivery pipe 8 for spraying. When the nozzle 1 sprays the cleaning liquid, the paint remaining on the nozzle 1 is also washed away, thereby realizing the cleaning of the nozzle 1.

[0022] For the cleaning waste liquid obtained after the nozzle 1 is cleaned by the cleaning liquid, as shown in Figure 1 and Figure 2 first, the collecting funnel 9 is used for collecting and converging, and the waste liquid is delivered to the waste liquid inlet 101 of the separator 10 and flows into the sedimentation cup 102 through the waste liquid inlet 101. The separator 10 is composed of the sedimentation cup 102 and the filter cup 103. The inlet of the filter cup 103 is arranged at the bottom of the filter cup 103. The filter cup 103 is matched with the sedimentation cup 102 through the fastening thread 109. When the filter cup 103 needs to be removed later, it can be loosened. The outer wall at the inlet of the filter cup 103 and the inner wall of the sedimentation cup 102 are provided with an annular sealing ring 106 for preventing the cleaning waste liquid from overflowing into the liquid storage cavity B through the gap between the outer wall at the inlet of the filter cup 103 and the inner wall of the sedimentation cup 102. The filter membrane 11 is arranged at the inlet of the filter cup 103. The filter membrane 11 can be sponge or filter cotton. As shown in Figure 2 the filter membrane 11 is arranged to extend in the horizontal direction to block the inlet at the bottom of the filter cup 103.

[0023] After the cleaning waste liquid is filtered through the filter membrane 11, only the cleaning liquid part can pass through the filter membrane 11 and enter the filter cup inner cavity A of the filter cup 103. The filtered paint part is first distributed on the bottom surface of the filter membrane 11, and then under the action of gravity, the paint sinks downward and converges at the bottom of the sedimentation cup 102, thereby ensuring that the filter membrane 11 is not blocked by the filtered paint, and ensuring that the filter membrane 11 can be used for a long time. After the cleaning liquid enters the filter cup inner cavity A, it flows into the liquid storage cavity B through the flow-through holes 105 uniformly distributed on the outer periphery of the filter cup inner cavity A. As shown in Figure 2As shown, the liquid storage cavity B is an annular cavity formed by the fastening thread 109, the filter cup 103, the deposition cup 102 and the sealing ring 106, which is used to collect the cleaning liquid to be delivered into the cleaning liquid return pipe 14 through the cleaning liquid outlet 104 on the liquid storage cavity B and finally returned into the cleaning liquid discharge tank 6.

[0024] For the paint sinking to the bottom of the deposition cup 102, as shown, since the bottom of the deposition cup 102 is funnel-shaped, the sinking paint can be well gathered at the bottom of the deposition cup 102 for recovery. The bottom of the deposition cup 102 is in communication with the electromagnetic valve 13, the electromagnetic valve 13 is in communication with the paint outlet 108, and the paint outlet 108 is in communication with the paint discharge tank 3 through the paint return pipe 141. Since the sinking and gathering of the paint need time, generally, the electromagnetic valve 13 can be set to be opened once after a certain interval of time, and the paint deposited at the bottom of the deposition cup 102 can be gathered into the paint discharge tank 3 through the paint outlet 108 at each opening time. Figure 2

[0025] In summary, in actual use, the separation process of the cleaning waste liquid is as follows: the cleaning waste liquid flows into the deposition cup 102 through the waste liquid inlet 101. With the gradual rising of the cleaning waste liquid level in the deposition cup 102, the cleaning waste liquid finally contacts the bottom surface of the upper filter membrane 11. Under the action of the filter membrane 11, only the cleaning liquid part of the cleaning waste liquid can flow upwards into the filter cup inner cavity A through the filter membrane 11 and then flow into the filter cup inner cavity A, while the paint in the cleaning waste liquid is distributed on the bottom surface of the filter membrane 11. The cleaning liquid in the filter cup inner cavity A flows into the cleaning liquid discharge tank 6 through the filter cup inner cavity A and the liquid storage cavity B, realizing the recovery of the cleaning liquid. The paint on the bottom surface of the filter membrane 11 is gradually deposited at the bottom of the deposition cup 102 under the action of gravity, and then is recovered into the paint discharge tank 3 through the timed opening of the electromagnetic valve 13.​

Claims

1. A steel coil inkjet printer cleaning waste liquid recovery system, comprising a nozzle (1), a paint discharge barrel (3) and a cleaning liquid discharge barrel (6), wherein the nozzle (1) is connected to the paint discharge barrel (3) through a paint delivery pipe (5), and the nozzle (1) is connected to the cleaning liquid discharge barrel (6) through a cleaning liquid delivery pipe (8), and is characterized in that: The separator (10) includes a sedimentation cup (102) and a filter cup (103), the filter cup (103) is arranged above the sedimentation cup (102), the sedimentation cup (102) and the filter cup (103) are connected, a filter membrane (11) for filtering out paint is arranged between the sedimentation cup (102) and the filter cup (103), the sedimentation cup (102) and the nozzle (1) are connected through a waste liquid inlet (101) arranged on the side wall of the sedimentation cup (102), the bottom of the sedimentation cup (102) and the paint discharge barrel (3) are connected through a paint return pipe (141), and the side wall of the filter cup (103) and the cleaning liquid discharge barrel (6) are connected through a cleaning liquid return pipe (14).

2. The steel coil inkjet printer cleaning waste liquid recovery system according to claim 1, characterized in that: The filter membrane (11) is arranged at the inlet at the bottom of the sedimentation cup (102), and the filter membrane (11) is extended in the horizontal direction. The horizontal plane where the waste liquid inlet (101) is located is lower than the horizontal plane where the filter membrane (11) is located.

3. The steel coil inkjet printer cleaning waste liquid recovery system according to claim 2, characterized in that: The sedimentation cup (102) and the filter cup (103) are detachably connected via a fastening thread (109).

4. The steel coil inkjet printer cleaning waste liquid recovery system according to claim 3, characterized in that: A sealing ring (106) is provided between the side wall of the bottom of the filter cup (103) and the inner wall of the sedimentation cup (102).

5. The steel coil inkjet printer cleaning waste liquid recovery system according to claim 4, characterized in that: The liquid storage chamber (B) is composed of a fastening thread (109), a filter cup (103), a sedimentation cup (102) and a sealing ring (106); the liquid storage chamber (B) is connected to the filter cup inner cavity (A) of the filter cup (103) through a flow hole (105); and the cleaning liquid outlet (104) of the liquid storage chamber (B) is connected to the cleaning liquid discharge barrel (6) through a cleaning liquid reflux pipe (14).

6. The steel coil inkjet printer cleaning waste liquid recovery system according to claim 5, characterized in that: The flow holes (105) are evenly arranged on the filter cup (103) around the rotation axis of the filter cup (103).

7. The steel coil inkjet printer cleaning waste liquid recovery system according to any one of claims 1 to 6, characterized in that: The bottom of the sedimentation cup (102) is funnel-shaped, and the paint outlet (108) at the bottom of the sedimentation cup (102) is connected to the paint return pipe (141).

8. The steel coil inkjet printer cleaning waste liquid recovery system according to claim 7, characterized in that: A solenoid valve (13) is provided between the paint outlet (108) and the bottom of the deposition cup (102).

9. The steel coil inkjet printer cleaning waste liquid recovery system according to any one of claims 1 to 6, characterized in that: It comprises a collecting funnel (9), which is arranged below the nozzle (1), with an opening of the collecting funnel (9) facing the nozzle (1), and a bottom of the collecting funnel (9) communicating with a waste liquid inlet (101).

10. The steel coil inkjet printer cleaning waste liquid recovery system according to any one of claims 1 to 6, characterized in that: The filter membrane (11) is a sponge or filter cotton.

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