Oriented silicon steel coil end face inhibitor coating system and flushing method

Abstract

The invention discloses an oriented silicon steel coil end face inhibitor coating system and a flushing method. The oriented silicon steel coil end face inhibitor coating system comprises a spraying device and a cleaning device connected to the spraying device. The spraying device comprises a stirring barrel assembly, a pre-filter, a diaphragm pump, a post-filter, a spray gun and a gas circuit assembly. The cleaning device comprises a water inlet assembly and a pollution discharge assembly. The system not only meets the functional requirement of painting a layer of inhibitor before the end face of the steel coil is annealed, but also cleans all parts of each spraying device after the system finishes spraying operation, so that the problem that an inhibiting solvent is easy to cake to block pipelines and system elements is solved. The spraying device is provided with three water inlet branches and three pollution discharge branches, and the three water inlet branches and the three pollution discharge branches are matched with a spray gun outlet to jointly form a three-inlet and four-outlet composite cleaning device. And by controlling the on-off of the feeding valve, the diaphragm pump and the injection valve in a matched manner, positive flushing and back flushing of all parts of the spraying device are achieved, residues of the inhibiting solution in the spraying device are further reduced, and blockage of the spraying device is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of silicon steel production, and particularly relates to an inhibitor coating system and a flushing method for the end face of grain-oriented silicon steel coils. Background Art

[0002] During the annealing process of silicon steel coils in a ring furnace, in order to inhibit the risk of edge cracking caused by the coarsening of edge grains during annealing, a layer of inhibitor is generally applied to the end face of the steel coil before annealing. However, the inhibitor is a mixture of various materials such as magnesium oxide and boric acid, and it reacts with air, water, etc. to form precipitates. These precipitates will be transported together with the materials, resulting in the residues of these precipitates solidifying and scaling inside the batching pipeline, blocking the batching tank body, pipeline, spraying nozzle and other systems. At present, there is no stable and reliable automatic spraying device on the silicon steel production line; if the inhibitor is applied manually, the labor intensity is high, there are occupational health hazards to the human body, and the coating quality is inconsistent, affecting the quality of silicon steel. There is an urgent need to develop an inhibitor coating system for the end face of grain-oriented silicon steel coils and corresponding control methods to solve the problem that the inhibitor is easy to block the pipeline. Summary of the Invention

[0003] In view of the above-mentioned defects existing in the prior art, an inhibitor coating system and a flushing method for the end face of grain-oriented silicon steel coils are provided, which have both spraying and flushing functions. Under the condition of completing the spraying operation, the relevant pipelines and components of the system can be flushed, solving the problem that the inhibitor solvent is easy to agglomerate and block the pipeline and system components.

[0004] The technical solution adopted by the present invention to solve the above technical problems is as follows: In a first aspect, an inhibitor coating system for the end face of grain-oriented silicon steel coils includes a spraying device and a cleaning device connected to the spraying device; The spraying device includes a stirring barrel assembly, a pre-filter, a diaphragm pump, a post-filter, a spray gun, and an air circuit assembly for driving the spray gun and the diaphragm pump arranged along the flow direction of the inhibitor; the air circuit assembly is divided into a first branch connected to the diaphragm pump and a second branch connected to the spray gun; a feed valve is arranged between the stirring barrel assembly and the pre-filter, and a spray valve is arranged between the post-filter and the spray gun; The cleaning device includes a water inlet assembly and a sewage discharge assembly. The water inlet assembly is provided with a first water inlet branch connected to the stirring barrel assembly, a second water inlet branch connected between the pre-filter and the diaphragm pump, and a third water inlet branch connected between the spray gun and the post-filter; the sewage discharge assembly is provided with a first sewage discharge branch connected to the bottom of the stirring barrel assembly, a second sewage discharge branch connected to the pre-filter, and a third sewage discharge branch connected to the post-filter.

[0005] According to the above technical solution, the third water inlet branch is connected between the spray valve and the post-filter According to the above technical solution, the stirring barrel assembly includes a stirring barrel body, a stirring paddle rotatably connected inside the stirring barrel body, and a stirring motor for driving the stirring paddle to rotate; a stirring barrel material inlet connected to the pre-filter is provided on the side wall of the stirring barrel body, and a stirring barrel sewage outlet connected to the first sewage discharge assembly is provided at the bottom of the stirring barrel body.

[0006] According to the above technical solution, the water inlet assembly further includes a water tank, a main water inlet pipeline connected to the water tank, and water inlet branch pipelines of a first water inlet branch, a second water inlet branch, and a third water inlet branch connected to the main water inlet pipeline; a water pump and a first flowmeter are provided on the main water inlet pipeline along the water flow direction; a flushing valve is provided on each water inlet branch pipeline.

[0007] According to the above technical solution, the sewage discharge assembly further includes a sewage discharge tank, a main sewage discharge pipeline connected to the sewage discharge tank, and sewage discharge branch pipelines of a first sewage discharge branch, a second sewage discharge branch, and a third sewage discharge branch connected to the main sewage discharge pipeline; a sewage discharge valve is provided on the sewage discharge branch pipeline.

[0008] According to the above technical solution, the gas circuit assembly further includes an air storage tank, a main gas circuit pipeline connected to the air storage tank, and gas circuit branch pipelines of a first branch and a second branch connected to the main gas circuit pipeline; a jet air flow valve is provided on the gas circuit branch pipeline of the second branch, and a diaphragm pump drive valve is provided on the gas circuit branch pipeline of the first branch.

[0009] According to the above technical solution, pressure gauges are provided at the outlet end of the post-filter and at the outlet end where the stirring barrel assembly is connected to the first sewage discharge branch; a second flowmeter is provided at the inlet end of the injection valve.

[0010] In the second aspect, a flushing method for coating the end face inhibitor of oriented silicon steel coils, the method includes overall rough flushing first and then local fine flushing; Overall rough flushing: Clean water enters the stirring barrel assembly from the first water inlet branch, and after the stirring barrel assembly is cleaned, the sewage is discharged from the spray gun at the end of the spraying device; Local fine flushing is divided into four steps: S1, close the diaphragm pump and the feed valve; the clean water entering the stirring barrel assembly from the first water inlet branch is discharged from the first sewage discharge branch after cleaning the stirring barrel assembly; clean water enters from the third water inlet branch, and the sewage is discharged from the spray gun after cleaning the spray gun; S2, turn on the diaphragm pump and close the feed valve; clean water enters from the third water inlet branch, and the sewage is discharged from the third sewage discharge branch after cleaning the filter; clean water enters from the second water inlet branch, and the sewage is discharged from the third sewage discharge branch after cleaning the diaphragm pump and the post-filter; S3, turn on the feed valve and close the diaphragm pump; clean water enters from the second water inlet branch, and is discharged from the first sewage discharge branch after cleaning the pre-filter, the feed valve, and the bottom of the stirring barrel assembly; S4. Close the feed valve and the diaphragm pump. Introduce clean water through the second water inlet branch, clean the pre-filter, and discharge it through the second sewage discharge branch.

[0011] According to the above technical solution, during the overall rough cleaning process, after injecting clean water through the first water inlet branch to the set value, the stirring paddle stirs at a speed of 80 - 100 r / min. After the stirring set time, turn on the spray gun. After the set delay time, sequentially turn on the feed valve, the injection valve, and the diaphragm pump.

[0012] According to the above technical solution, in S3, after the second water inlet branch is closed, delay the set time to close the diaphragm pump; after the diaphragm pump is closed, close the third sewage discharge branch.

[0013] The present invention has the following beneficial effects: 1. The spraying device and the cleaning device are provided, which not only meet the functional requirements of applying an inhibitor layer on the end face of the steel coil before annealing, but also clean each component of the spraying device after the system completes the spraying operation, solving the problem that the inhibitor solvent is prone to caking and blocking the pipeline and system components.

[0014] 2. There are three water inlet branches and three sewage discharge branches on the spraying device. In cooperation with the spray gun outlet, they jointly constitute a three-in-four-out composite cleaning device. In addition, by controlling the opening and closing of the feed valve, the diaphragm pump, and the injection valve inside the spraying device, under the control of the flushing method of this application, the positive flushing and reverse flushing, or rough cleaning and fine cleaning of each component of the spraying device are realized, further reducing the residue of the inhibitor solution in the spraying device and avoiding the blockage of the spraying device.

[0015] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present invention and combines with the drawings to describe in detail as follows. The specific implementation manner of the present invention is given in detail by the following embodiments and their drawings. Description of the Drawings

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0017] Figure 1 It is the system schematic diagram of the embodiment provided by the present invention; In the figure, 1 is the stirring barrel assembly; 1-1 is the stirring barrel body; 1-2 is the stirring paddle; 1-3 is the stirring motor; 1-4 is the feeding port of the stirring barrel; 1-5 is the sewage outlet of the stirring barrel; 2 is the pre-filter; 3 is the diaphragm pump; 4 is the post-filter; 5 is the spray gun; 6 is the gas circuit assembly; 6-1 is the first branch; 6-2 is the second branch; 6-3 is the air storage tank; 6-4 is the injection air flow valve; 6-5 is the diaphragm pump drive valve; 7 is the feeding valve; 8 is the injection valve; 9 is the water inlet assembly; 9-1 is the first water inlet branch; 9-2 is the second water inlet branch; 9-3 is the third water inlet branch; 9-4 is the water tank; 9-5 is the water pump; 9-6 is the first flowmeter; 9-7 is the flushing valve; 10 is the sewage discharge assembly; 10-1 is the first sewage discharge branch; 10-2 is the second sewage discharge branch; 10-3 is the third sewage discharge branch; 10-4 is the sewage discharge tank; 10-5 is the sewage discharge valve; 11 is the pressure gauge; 12 is the second flowmeter. Detailed implementation mode

[0018] The following combines the attached Figure 1 The principles and features of the present invention will be described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention. In the following paragraphs, the present invention will be described more specifically by way of example with reference to the accompanying drawings. The advantages and features of the present invention will be clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0019] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] Referring to Figure 1 As shown, the grain-oriented silicon steel coil end face inhibitor coating system provided by the present invention includes a spraying device and a cleaning device connected to the spraying device.

[0022] Example 1 The spraying device includes a stirring tank assembly 1, a pre-filter 2, a diaphragm pump 3, a post-filter 4, a spray gun 5 arranged along the flowing direction of the inhibitor, and a gas circuit assembly 6 for driving the spray gun and the diaphragm pump; the gas circuit assembly is divided into a first branch 6-1 connected to the diaphragm pump and a second branch 6-2 connected to the spray gun; a feed valve 7 is arranged between the stirring tank assembly and the pre-filter, and a spray valve 8 is arranged between the post-filter and the spray gun; The cleaning device includes a water inlet assembly 9 and a sewage discharge assembly 10. The water inlet assembly is provided with a first water inlet branch 9-1 connected to the stirring tank assembly, a second water inlet branch 9-2 connected between the pre-filter and the diaphragm pump, and a third water inlet branch 9-3 connected between the spray gun and the post-filter; the sewage discharge assembly is provided with a first sewage discharge branch 10-1 connected to the bottom of the stirring tank assembly, a second sewage discharge branch 10-2 connected to the pre-filter, and a third sewage discharge branch 10-3 connected to the post-filter.

[0023] Embodiment 2 On the basis of Embodiment 1, as shown in the figure, in order to prevent the residual paint in the spray valve from entering the post-filter during the backwashing process of the post-filter, the third water inlet branch is connected between the spray valve and the post-filter, thereby improving the cleaning effect of the entire system.

[0024] In Embodiments 1-2, the stirring tank assembly includes a stirring tank body 1-1, a stirring paddle 1-2 rotatably connected in the stirring tank body, and a stirring motor 1-3 for driving the stirring paddle to rotate; a stirring tank feeding port 1-4 connected to the pre-filter is arranged on the side wall of the stirring tank body, and a stirring tank sewage discharge port 1-5 connected to the first sewage discharge assembly is arranged at the bottom of the stirring tank body.

[0025] In Embodiments 1-2, the water inlet assembly further includes a water tank 9-4, a main water inlet pipeline connected to the water tank, and water inlet branch pipelines of the first water inlet branch, the second water inlet branch, and the third water inlet branch connected to the main water inlet pipeline; a water pump 9-5 and a first flow meter 9-6 are arranged on the main water inlet pipeline along the water flow direction; a flushing valve 9-7 is arranged on each water inlet branch pipeline.

[0026] The water suction port of the water pump is connected to the water tank, the water outlet of the water pump is connected with a first flow meter, and water inlet branches are arranged between the stirring tank assembly, the pre-filter and the diaphragm pump, and between the post-filter and the spray gun.

[0027] In Embodiments 1-2, the sewage discharge assembly further includes a sewage tank 10-4, a main sewage discharge pipeline connected to the sewage tank, and sewage discharge branch pipelines of the first sewage discharge branch, the second sewage discharge branch, and the third sewage discharge branch connected to the main sewage discharge pipeline; a sewage discharge valve 10-5 is arranged on the sewage discharge branch pipeline. The sewage discharge branches are respectively connected to the pre-filter, the post-filter, and the sewage discharge port at the bottom of the stirring tank body, and sewage discharge valves are provided.

[0028] With the above - provided water inlet branch and sewage discharge branch, multiple cleaning paths are formed within the system. By opening and closing different water inlet branches and sewage discharge branches, rough cleaning and fine cleaning, or forward flushing and reverse flushing of each component within the spraying device can be achieved.

[0029] In Embodiments 1 - 2, the gas circuit assembly further includes an air storage tank 6 - 3, a main gas circuit pipeline connected to the air storage tank, and gas circuit branch pipelines of a first branch and a second branch connected to the main gas circuit pipeline; a jet air flow valve 6 - 4 is provided on the gas circuit branch pipeline of the second branch, and a diaphragm pump drive valve 6 - 5 is provided on the gas circuit branch pipeline of the first branch.

[0030] In Embodiments 1 - 2, pressure gauges 11 are provided at the outlet end of the post - filter and at the outlet end where the stirring barrel assembly is connected to the first sewage discharge branch; a second flowmeter 12 is provided at the inlet end of the injection valve.

[0031] A pressure gauge is pre - installed and connected to the bottom of the stirring barrel body. The pressure gauge is used to test the solvent liquid level pressure within the stirring barrel body, that is, to feed back the hydraulic value within the stirring barrel body through the pressure value, so as to control the inhibitor solvent pre - installed within the stirring barrel body within a certain upper and lower limit range of the liquid level. The pressure gauge at the outlet of the post - filter can be used to monitor the spraying inhibitor solvent pressure or flushing water pressure of the pipeline system.

[0032] The spraying process of the above - mentioned system is as follows: All the water inlet branches and sewage discharge branches of the cleaning device are in a closed state.

[0033] The feed valve is in an open state, and the stirring motor is synchronously started to drive the stirring paddle to perform low - speed stirring on the inhibitor solvent within the stirring barrel body; the stirring speed is within the range of 10 - 15 r / min to prevent the inhibitor solvent from precipitating.

[0034] The gas pressure within the air storage tank of the gas circuit assembly is set within the range of 0.8 MPa. The diaphragm pump drive valve of the first branch of the gas circuit assembly is opened, and the compressed air within the air storage tank drives the diaphragm pump to work. The inhibitor solvent within the stirring barrel body flows through the stirring barrel material outlet, the feed valve, and after passing through the pre - filter, enters the diaphragm pump.

[0035] The pneumatic diaphragm pump pressurizes the inhibitor solvent, and the spray gun is adjusted to the spraying station; the pressure gauge at the outlet of the post - filter is used to monitor the pressure stability of the inhibitor solvent. When the inhibitor solvent is pressurized to 0.8 Mpa, the jet air flow valve of the second branch of the gas circuit assembly is started, and the compressed gas within the air storage tank enters the air inlet of the spray gun.

[0036] After the jet air flow valve is started, the injection valve is started after a 2 - second delay, the inhibitor solvent enters the feed port of the injection valve, and the spray gun starts the spraying operation.

[0037] After completing the spraying standard for the entire end face of the grain-oriented silicon steel coil, stop the spraying operation, and sequentially close the feed valve, diaphragm pump drive valve, and injection valve in order, and then close the injection air flow valve after a 6-second delay.

[0038] The present invention also provides a flushing method for the coating system of the inhibitor on the end face of the grain-oriented silicon steel coil, and the method includes overall rough flushing first and then local fine flushing.

[0039] Overall rough flushing: Clean water enters the stirring barrel assembly from the first water inlet branch. After the cleaning of the stirring barrel assembly is completed, the sewage is discharged from the spray gun at the end of the spraying device.

[0040] Specifically, adjust the spray gun from the spraying station to the flushing station; open the flushing valve on the first water inlet branch and start the water pump. The cleaning water in the water tank is pressurized to 1.0 MPa, and after passing through the first flow meter and the flushing valve on the first water inlet branch, it enters the stirring barrel body. The first flow meter is used to monitor and feedback the water pump flow control, and the water pump flow is controlled at 6 L / min. When the liquid level line in the stirring barrel body reaches the upper limit, start the stirring motor to drive the stirring paddle to perform high-speed stirring on the inhibitor solvent in the stirring barrel body, and the stirring speed is within the range of 80 - 100 r / min. After stirring for 2 minutes, open the injection air flow valve on the second branch of the air circuit assembly; after a 2-second delay, sequentially open the feed valve, injection valve, and diaphragm pump drive valve on the first branch of the air circuit assembly, and the cleaning water flushes the water tank, feed valve, pre-filter, diaphragm pump, post-filter, first flow meter, injection valve, and spray gun in sequence. This process flushes for 8 minutes, and then close the injection air flow valve on the second branch of the air circuit assembly, the diaphragm pump drive valve on the first branch of the air circuit assembly, the feed valve, and the stirring motor.

[0041] During the overall rough flushing process, first inject clean water into the stirring barrel body, and then use the high-speed rotation of the stirring paddle to achieve the preliminary cleaning of the stirring barrel body; after the cleaning of the stirring barrel is completed, discharge the wastewater from the cleaning of the stirring barrel through the spraying path of the spraying device, and perform preliminary cleaning on each component of the spraying device according to the spraying path.

[0042] After the above overall rough flushing is completed, perform subsequent local fine flushing; the local fine flushing is divided into four steps: S1, close the diaphragm pump and the feed valve; the clean water entering the stirring barrel assembly from the first water inlet branch is discharged from the first sewage branch after cleaning the stirring barrel assembly; the clean water entering from the third water inlet branch is used to clean the spray gun, and the sewage is discharged from the spray gun.

[0043] Specifically, the diaphragm pump drive valve and the feed valve in the first branch of the gas path assembly are in the closed state; the injection air flow valve in the second branch of the gas path assembly (if not closed during the overall rough washing process, it is in the open state at this time and does not need to be reopened), the flushing valve in the first water inlet branch, the flushing valve in the third water inlet branch, and the sewage discharge valve in the first sewage discharge branch are in the open state, and the water pump flow rate is controlled at 10 L / min.

[0044] The cleaning water flushes the stirring barrel through the flushing valve in the first water inlet branch and is injected into the sewage tank through the sewage discharge valve in the first sewage discharge branch. The cleaning water flushes the flow meter, injection valve and spray gun through the flushing valve in the third water inlet branch and is discharged from the spray gun. This process is flushed for 3 minutes, and the injection air flow valve in the second branch of the gas path assembly and the flushing valve on the first water inlet branch are closed.

[0045] S2. Turn on the diaphragm pump and close the feed valve; clean water enters from the third water inlet branch, and the sewage after passing through the filter is discharged through the third sewage discharge branch; clean water enters from the second water inlet branch, and the diaphragm pump and the post-filter are cleaned and then discharged through the third sewage discharge branch.

[0046] Specifically, the flushing valve in the second water inlet branch, the flushing valve in the third water inlet branch, the sewage discharge valve in the third sewage discharge branch and the diaphragm pump drive valve in the first branch of the gas path assembly are in the open state. The cleaning water backwashes the post-filter through the flushing valve in the third water inlet branch and is injected into the sewage tank through the sewage discharge valve in the third sewage discharge branch. The cleaning water flushes the diaphragm pump and the post-filter through the flushing valve in the second water inlet branch and is injected into the sewage tank through the sewage discharge valve in the third sewage discharge branch. After flushing for 2 minutes, first close the flushing valve in the third water inlet branch, and then close the diaphragm pump drive valve in the first branch of the gas path assembly after a 2-minute delay. After the diaphragm pump drive valve in the first branch of the gas path assembly is closed, close the sewage discharge valve in the third sewage discharge branch. The flushing valve in the second water inlet branch is not closed and will continue to be used in S3.

[0047] S3. Open the feed valve and close the diaphragm pump; clean water enters from the second water inlet branch, and after cleaning the pre-filter, feed valve and the bottom of the stirring barrel assembly, it is discharged through the first sewage discharge branch.

[0048] Open the feed valve, the flushing valve in the second water inlet branch, and the sewage discharge valve in the first sewage discharge branch; control the water pump flow rate at 6 L / min. The cleaning water flushes the pre-filter, feed valve and the bottom of the stirring barrel through the flushing valve in the second water inlet branch and is injected into the sewage tank through the sewage discharge valve in the first sewage discharge branch. After flushing for 2 minutes, close the feed valve and the sewage discharge valve in the first sewage discharge branch.

[0049] S4. Close the feed valve and the diaphragm pump; clean water enters from the second water inlet branch, and after cleaning the pre-filter, it is discharged through the second sewage discharge branch.

[0050] Open the drain valve of the second drain branch. The cleaning water passes through the flushing valve of the second water inlet branch to backflush the pre-filter, and is injected into the drain tank through the drain valve of the second drain branch. After flushing for 2 minutes, turn off the water pump, the flushing valve of the second water inlet branch, and the drain valve of the second drain branch in sequence.

[0051] There are three water inlet branches and three drain branches on the spraying device. Together with the spray gun outlet, they jointly form a three-in-four-out composite cleaning device. In addition, the on-off of the feed valve, diaphragm pump, and injection valve inside the spraying device is also controlled. Under the control of the flushing method of this application, the positive flushing and backflushing, or rough washing and fine washing of each component of the spraying device are realized, further reducing and suppressing the residue of the solution in the spraying device and avoiding the blockage of the spraying device.

[0052] The above is only the preferred embodiment of the present invention, and it is not intended to limit the present invention in any form; any ordinary technician in the industry can smoothly implement the present invention as shown in the accompanying drawings of the specification and described above; however, any slight changes, modifications, and equivalent changes made by those skilled in the art within the scope of the technical solution of the present invention by using the technical content disclosed above are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications, and evolutions made to the above embodiments based on the essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. An end face inhibitor coating system for grain-oriented silicon steel coils, characterized in that: It includes a spraying device and a cleaning device connected to the spraying device; The spraying device includes a stirring barrel assembly, a pre-filter, a diaphragm pump, a post-filter, a spray gun, and a gas circuit assembly for driving the spray gun and the diaphragm pump along the flow direction of the inhibitor; the gas circuit assembly is divided into a first branch connected to the diaphragm pump and a second branch connected to the spray gun; a feed valve is provided between the stirring barrel assembly and the pre-filter, and a spray valve is provided between the post-filter and the spray gun; The cleaning device includes a water inlet assembly and a sewage discharge assembly. The water inlet assembly is provided with a first water inlet branch connected to the stirring barrel assembly, a second water inlet branch connected between the pre-filter and the diaphragm pump, and a third water inlet branch connected between the spray gun and the post-filter; the sewage discharge assembly is provided with a first sewage discharge branch connected to the bottom of the stirring barrel assembly, a second sewage discharge branch connected to the pre-filter, and a third sewage discharge branch connected to the post-filter.

2. The end face inhibitor coating system for grain-oriented silicon steel coils according to claim 1, wherein: The third water inlet branch is connected between the spray valve and the post-filter.

3. The end face inhibitor coating system for grain-oriented silicon steel coils according to claim 1 or 2, characterized in that: The stirring barrel assembly includes a stirring barrel body, a stirring paddle rotatably connected in the stirring barrel body, and a stirring motor for driving the stirring paddle to rotate; a stirring barrel feeding port connected to the pre-filter is provided on the side wall of the stirring barrel body, and a stirring barrel sewage discharge port connected to the first sewage discharge assembly is provided at the bottom of the stirring barrel body.

4. The end face inhibitor coating system for grain-oriented silicon steel coils according to claim 1 or 2, characterized in that: The water inlet assembly further includes a water tank, a main water inlet pipeline connected to the water tank, and water inlet branch pipelines of the first water inlet branch, the second water inlet branch, and the third water inlet branch connected to the main water inlet pipeline; a water pump and a first flow meter are provided on the main water inlet pipeline along the water flow direction; a flushing valve is provided on each water inlet branch pipeline.

5. The end face inhibitor coating system for grain-oriented silicon steel coils according to claim 1 or 2, characterized in that: The sewage discharge assembly further includes a sewage discharge tank, a main sewage discharge pipeline connected to the sewage discharge tank, and sewage discharge branch pipelines of the first sewage discharge branch, the second sewage discharge branch, and the third sewage discharge branch connected to the main sewage discharge pipeline; a sewage discharge valve is provided on the sewage discharge branch pipeline.

6. The end face inhibitor coating system for grain-oriented silicon steel coils according to claim 1 or 2, characterized in that: The gas circuit assembly further includes an air storage tank, a main gas circuit pipeline connected to the air storage tank, and gas circuit branch pipelines of the first branch and the second branch connected to the main gas circuit pipeline; a jet air flow valve is provided on the second branch gas circuit branch pipeline, and a diaphragm pump drive valve is provided on the first branch gas circuit branch pipeline.

7. The end face inhibitor coating system for grain-oriented silicon steel coils according to claim 1 or 2, characterized in that: Pressure gauges are provided at the outlet end of the post-filter and at the outlet end where the stirring barrel assembly is connected to the first sewage discharge branch; a second flow meter is provided at the inlet end of the spray valve.

8. Flushing method for coating end face inhibitor of oriented silicon steel coil, characterized in that: The method includes overall rough cleaning first and then local fine cleaning; Overall rough cleaning: Clear water enters the stirring barrel assembly through the first water inlet branch. After the stirring barrel assembly is cleaned, the sewage is discharged from the spray gun at the end of the spraying device; Local fine cleaning is divided into four steps: S1, close the diaphragm pump and the feed valve; the clear water entering the stirring barrel assembly through the first water inlet branch is discharged from the first sewage discharge branch after cleaning the stirring barrel assembly; the clear water entering through the third water inlet branch is discharged from the spray gun after cleaning the spray gun; S2, turn on the diaphragm pump and close the feed valve; the clear water entering through the third water inlet branch is discharged from the third sewage discharge branch after cleaning the filter; the clear water entering through the second water inlet branch is discharged from the third sewage discharge branch after cleaning the diaphragm pump and the post-filter; S3. Open the feed valve and close the diaphragm pump. Let clear water enter through the second water inlet branch, clean the pre-filter, the feed valve, and the bottom of the stirring tank assembly, and then discharge it through the first sewage discharge branch. S4. Close the feed valve and the diaphragm pump. Let clear water enter through the second water inlet branch, clean the pre-filter, and then discharge it through the second sewage discharge branch.

9. The rinsing method for coating the end face inhibitor of the grain-oriented silicon steel coil according to claim 8, characterized in that: During the overall rough cleaning process, after injecting clear water through the first water inlet branch to the set value, the stirring paddle stirs at a speed of 80 - 100 r / min. After the stirring for the set time, turn on the spray gun. After a delay of the set time, turn on the feed valve, the injection valve, and the diaphragm pump in sequence.

10. The rinsing method for coating the end face inhibitor of the grain-oriented silicon steel coil according to claim 8, characterized in that: In S3, after the second water inlet branch is closed, close the diaphragm pump after a delay of the set time. After the diaphragm pump is closed, close the third sewage discharge branch.

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