Fireproof plate edge coating system and paint adjusting method

Abstract

The invention discloses a fireproof plate edge coating system and a paint adjusting method.The fireproof plate edge coating system comprises a spray head assembly, the spray head assembly is provided with a spray head, the front end of the spray head is provided with an oil spraying opening and an oil returning opening, and the fireproof plate edge coating system further comprises an oil supply pump, an oil storage tank, a vacuum oil tank, an exhaust fan and a paint circulating liquid supplementing container; the oil storage tank is respectively connected with the input end of the oil supply pump and the oil outlet end of the oil tank through oil ways, the oil return port is connected with the suction inlet of the oil tank, the air inlet end of the exhaust fan is connected with the air outlet end of the oil tank, and the paint circulating liquid supplementing container is connected with the spray head through an oil way; the paint adjusting method comprises the steps that paint is added into the oil storage tank, a diluent is added into the paint circulation liquid supplementing container, the oil supply pump and the exhaust fan work to form paint circulation, and the diluent in the paint circulation liquid supplementing container is input into the spray head through the corresponding oil way. The method is beneficial for improving the plate product quality.

Description

Technical Field

[0001] The present invention relates to the field of plate edge coating equipment, and particularly relates to a fireproof plate edge coating system and a paint adjustment method. Background Art

[0002] At present, sheet edge coating equipment is used to paint and seal the edges of sheets, such as "A Fully Automatic Digital Edge Banding Machine and Its Edge Banding Process" with Chinese invention patent publication number CN110576497B and "An Edge Coating and Sanding Machine" with Chinese invention patent publication number CN110548662B. The sheet edge coating equipment is provided with a sheet edge coating system, and the sheet edge coating system includes a nozzle device for spraying paint on the side of the sheet. For example, in "A Quick-Change Nozzle Device" with Chinese utility model patent publication number CN212596661U, the front end of the nozzle device is provided with paint spraying holes and oil suction holes. The paint spraying holes and the oil suction holes are arranged close to each other. In the working state, the front end of the nozzle die is close to the edge of the sheet, and the oil is sprayed on the edge of the sheet through the paint spraying holes, and the excess oil is sucked away by the oil suction holes: In order to save paint, the excess oil is sucked away by the oil suction holes and recycled into the vacuum oil tank, and the oil pump transports the paint recycled in the vacuum oil tank back to the paint spraying holes, thus forming a paint circulation. In the paint circulation, a storage oil tank is arranged between the oil pump and the vacuum oil tank. When the liquid level in the storage oil tank drops to a certain level, the worker replenishes the fireproof paint (in a certain formula) into the storage oil tank. At present, the sheet edge coating equipment usually uses UV paint. Therefore, after the nozzle device sprays the UV paint on the side of the sheet, UV light curing and drying are also required. Reference can be made to "An Edge Coating and Sanding Machine" with Chinese invention patent publication number CN110548662B. However, the fireproof performance of the cured UV paint is not good. Now it is necessary to produce a sheet with better fireproof performance, and it is necessary to coat fireproof paint on the side of the sheet. Then the sheet edge coating equipment dries the fireproof paint. The fireproof paint contains a diluent, and the diluent will volatilize and be lost in the paint circulation, resulting in insufficient diluent content in the fireproof paint in the paint circulation, affecting the paint circulation and transportation, and affecting the effect of coating the fireproof paint on the side of the sheet, which is not conducive to improving the quality of the sheet product. For the nozzle device of the prior art, such as "A Quick-Change Nozzle Device" with Chinese utility model patent publication number CN212596661U, the paint spraying holes of the nozzle device are single-slit-shaped, and oil suction holes are respectively arranged on the left and right sides of the paint spraying holes, which results in good paint flow on one side of the oil suction holes. In the case of using UV paint, since the UV paint needs to be cured by UV irradiation, no dry paint blocks will be formed at the nozzle position. However, since the diluent of the fireproof paint is relatively easy to volatilize, dry paint blocks are likely to be formed on one side of the oil suction holes. For example, there is a lack of paint flowing through the left edge of the oil suction hole located on the left side of the paint spraying hole. A small amount of paint splashed on the left edge of the above oil suction hole has poor fluidity and cannot be replenished with the diluent in the paint in time, so it is easy to form dry paint blocks at the left edge of the above oil suction hole. The dry paint gradually accumulates and causes blockage. The dry paint blocks will also contact the side of the sheet, which will affect the normal coating of the paint on the side of the sheet and is also not conducive to improving the quality of the sheet product. Summary of the Invention

[0003] The object of the present invention is to overcome the deficiencies of the prior art and first provide a fireproof board edge coating system, which is beneficial to improving the quality of board products.

[0004] The object of the present invention is achieved by the following technical solutions.

[0005] The disclosed fireproof board edge coating system of the present invention includes a nozzle assembly. The nozzle assembly is provided with a nozzle. An oil injection port and an oil return port are provided at the front end of the nozzle, and the position of the oil injection port corresponds to the oil return port. Among them, it also includes an oil supply pump, a storage tank, a vacuum tank, a suction fan, and a paint circulation replenishment container. The vacuum tank is provided with a tank suction inlet and a tank oil outlet end. The output end of the oil supply pump is connected to the oil injection port. The storage tank is respectively connected to the input end of the oil supply pump and the tank oil outlet end through oil circuits. The oil return port is connected to the tank suction inlet. The vacuum tank is provided with a tank air outlet end. The air inlet end of the suction fan is connected to the tank air outlet end. The paint circulation replenishment container is connected to the nozzle through an oil circuit.

[0006] Preferably, the oil injection port includes a left oil injection groove, a right oil injection groove, an upper oil injection groove, and a lower oil injection groove. The left oil injection groove is arranged on the left side of the oil return port. The right oil injection groove is arranged on the right side of the oil return port. The upper oil injection groove is arranged on the upper side of the oil return port. The lower oil injection groove is arranged on the lower side of the oil return port.

[0007] Preferably, an oil return channel is formed inside the nozzle. The front end of the oil return channel communicates with the oil return port. The rear end of the oil return channel penetrates through the nozzle. Left oil outlet channels, right oil outlet channels, upper oil outlet channels, and lower oil outlet channels are formed inside the nozzle. Left oil inlet holes and right oil inlet holes are formed on the nozzle. Both the left oil inlet hole and the right oil inlet hole are arranged to extend in the up-down direction. The left oil injection groove communicates with the left oil inlet hole through the left oil outlet channel. The right oil injection groove communicates with the right oil inlet hole through the right oil outlet channel. The upper oil injection groove communicates with the left oil inlet hole and the right oil inlet hole through the upper oil outlet channel. The lower oil injection groove communicates with the left oil inlet hole and the right oil inlet hole through the lower oil outlet channel. The oil return channel is arranged between the left oil inlet hole and the right oil inlet hole.

[0008] Preferably, the left oil outlet channel, the right oil outlet channel, the upper oil outlet channel, and the lower oil outlet channel are arranged to gradually approach each other from the rear to the front.

[0009] Preferably, the left oil inlet hole and the right oil inlet hole penetrate through the nozzle. The left oil inlet hole and the right oil inlet hole are connected to the output end of the oil supply pump through a five-way pipe fitting.

[0010] Preferably, a replenishment hole is formed on the nozzle. The lower end of the replenishment hole communicates with the upper oil outlet channel. The upper end of the replenishment hole is connected to the paint circulation replenishment container through an oil circuit.

[0011] Preferably, the rear end of the upper oil outlet passage communicates with the left oil inlet hole and the right oil inlet hole, and the lower end of the liquid supplement hole communicates with the front end of the upper oil outlet passage.

[0012] Preferably, the edge coating system for fireproof boards of the present invention further includes a liquid supplement metering pump. The input end of the liquid supplement metering pump is connected to the paint circulation liquid supplement container, and the output end of the liquid supplement metering pump is connected to the upper end of the liquid supplement hole.

[0013] Preferably, the edge coating system for fireproof boards of the present invention further includes a container bracket for installing and connecting a pressure beam, and the paint circulation liquid supplement container is arranged on the container bracket.

[0014] The present invention also provides a paint adjustment method using the above-mentioned edge coating system for fireproof boards, which includes the following steps: Step S1, adding paint to the storage oil tank and adding a diluent to the paint circulation liquid supplement container; Step S2, operating the oil supply pump and the exhaust fan to form a paint circulation; Step S3, inputting the diluent in the paint circulation liquid supplement container into the spray head through the corresponding oil passage.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) By providing an edge coating system for fireproof boards including an oil supply pump, a storage oil tank, a vacuum oil tank, an exhaust fan and a paint circulation liquid supplement container, the vacuum oil tank is provided with an oil tank suction port and an oil tank outlet end, the output end of the oil supply pump is connected to the spray port, the storage oil tank is respectively connected to the input end of the oil supply pump and the oil tank outlet end through oil passages, the oil return port is connected to the oil tank suction port, the vacuum oil tank is provided with an oil tank air outlet end, the intake end of the exhaust fan is connected to the oil tank air outlet end, and the paint circulation liquid supplement container is connected to the spray head through an oil passage, so that the diluent can be well supplemented and mixed into the paint circulation. Therefore, the present invention is beneficial to improving the quality of board products. (2) The paint adjustment method of the present invention can effectively supplement the diluent into the paint circulation, thereby being beneficial to improving the quality of board products. Description of the Drawings

[0016] Figure 1 It is a three-dimensional structure schematic diagram in the right rear view direction of the combination of the edge coating system for fireproof boards of the present invention, the pressure beam and the bed body of the board edge coating equipment.

[0017] Figure 2 It is a three-dimensional structure schematic diagram in the left rear view direction of the combination of the edge coating system for fireproof boards of the present invention, the pressure beam and the bed body of the board edge coating equipment.

[0018] Figure 3 is Figure 2 Partial structure schematic diagram of part A of

[0019] Figure 4 It is a three-dimensional structure schematic diagram of the spray head assembly of the present invention.

[0020] Figure 5 Schematic cross-sectional structure diagram of the nozzle assembly of the present invention.

[0021] Figure 6 Front orthographic three-dimensional structure diagram of the nozzle of the present invention.

[0022] Figure 7 Horizontal sectional three-dimensional structure diagram of the nozzle of the present invention.

[0023] Figure 8 Schematic cross-sectional structure diagram of the nozzle of the present invention in the rear view direction.

[0024] Figure 9 Vertical sectional three-dimensional structure diagram of the nozzle of the present invention.

[0025] Figure 10 Schematic diagram of the connection structure between the nozzle of the present invention and the paint circulation replenishment container.

[0026] Figure 11 Schematic cross-sectional structure diagram of the combination of the vacuum oil tank and the transition oil tank of the present invention.

[0027] Label description: nozzle assembly 1; nozzle 11; oil injection port 110; left oil injection groove 111; left oil outlet channel 1111; right oil injection groove 112; right oil outlet channel 1121; upper oil injection groove 113; upper oil outlet channel 1131; lower oil injection groove 114; lower oil outlet channel 1141; left oil inlet hole 1151; right oil inlet hole 1152; oil return port 116; oil return channel 1161; replenishment hole 117; oil return pipe 12; suction pipe 121; nozzle transverse movement driving cylinder 13; nozzle lifting adjustment screw 14; support 15; oil supply pump 2; oil supply pipe 21; five-way pipe fitting 22; branch pipe 23; storage oil tank 3; storage oil tank stirring device 31; oil transfer pump 4; transition oil tank 5; transition oil tank stirring device 51; vacuum oil tank 6; oil tank suction port 61; temporary storage bucket 62; oil tank air outlet end 63; oil tank oil outlet end 64; exhaust fan 7; paint circulation replenishment container 8; replenishment pipe 81; container support 82; replenishment metering pump 9; pressing beam 99; bed body 98; sheet material 97. Detailed implementation manners

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] The fireproof sheet material edge coating system of the present invention, as Figures 1 to 4 shown, includes a nozzle assembly 1. The nozzle assembly 1 is provided with a nozzle 11. As Figure 6 shown, an oil injection port 110 and an oil return port 116 are provided at the front end of the nozzle 11. The position of the oil injection port 110 corresponds to the oil return port 116. As Figures 1 to 4As shown in the figure, the edge coating system of the fireproof board of the present invention further includes an oil supply pump 2, a fuel tank 3, a vacuum oil tank 6, a suction fan 7, and a paint circulation replenishment container 8. The suction fan 7 is a prior art. For example, reference can be made to the "Adjustable pressure vortex blower" with the Chinese utility model patent publication number CN209340185U or the "High-pressure blower" with the Chinese utility model patent publication number CN217926384U. As Figure 11 shown, the vacuum oil tank 6 is provided with an oil tank suction port 61 and an oil tank outlet end 64. As Figure 3 shown, the output end of the oil supply pump 2 is connected to the spray nozzle 110. As Figure 1 shown, the fuel tank 3 is respectively connected to the input end of the oil supply pump 2 and the oil tank outlet end 64 through oil circuits. As Figure 3 and Figure 11 shown, the oil return port 116 is connected to the oil tank suction port 61. The vacuum oil tank 6 is provided with an oil tank air outlet end 63. The air inlet end of the suction fan 7 is connected to the oil tank air outlet end 63. As Figure 3 shown, the paint circulation replenishment container 8 is connected to the spray head 11 through an oil circuit.

[0030] The working principle of the edge coating system of the fireproof board of the present invention is briefly described as follows: As Figures 1 to 5 shown, paint is added to the fuel tank 3, and a thinner is added to the paint circulation replenishment container 8 to make the oil supply pump 2 and the suction fan 7 work to form a paint circulation. Specifically, the input end of the oil supply pump 2 extracts the paint in the fuel tank 3, and the output end of the oil supply pump 2 transports the paint to the spray head 11. Then, the paint is sprayed out from the spray nozzle 110. As Figure 5 shown, the side of the board 97 abuts and passes by (in the Figure 1 visual direction, the board 97 moves in the left-right direction) the front end face of the spray head 11. Thus, the paint sprayed out from the spray nozzle 110 can adhere to the side of the board 97. The paint not captured by the side of the board 97 is immediately sucked back by the oil return port 116. Then, the paint recovered through the oil return port 116 flows through the oil return pipe 12 to the suction pipe 121. The recovered paint enters the interior of the vacuum oil tank 6 through the oil tank suction port 61. As Figure 11 shown, the recovered paint turns downward and falls into the temporary storage bucket 62 inside the vacuum oil tank 6. The recovered paint drips down from the bottom of the temporary storage bucket 62 onto an inclined deflector inside the vacuum oil tank 6. Thus, the recovered paint flows downward along the above-mentioned inclined deflector to the oil tank outlet end 64. The recovered paint then reaches the fuel tank 3 through the corresponding oil circuit, thereby forming a paint circulation. The air flow that enters the temporary storage bucket 62 through the oil tank suction port 61 also discharges to the interior of the vacuum oil tank 6 through the bottom of the temporary storage bucket 62 (as Figure 11As shown by the dashed arrow in the figure, the air outlet end 63 of the fuel tank is arranged above the temporary storage barrel 62. Thus, the air flow turns upwards and flows to the air outlet end 63 of the fuel tank. Then the air flow passes through the exhaust fan 7 and is discharged from the air outlet end of the exhaust fan 7 to the outside. The fine oil droplets in the air flow fall back to the above-mentioned inclined deflector under the action of gravity. Since the diluent is relatively easy to volatilize, a small amount of diluent is discharged and lost through the air outlet end 63 of the fuel tank. The storage fuel tank 3 is provided with an openable tank cover. When the amount of paint in the storage fuel tank 3 significantly decreases, the above-mentioned tank cover can be opened to add paint into the storage fuel tank 3. During the working process of the fireproof board edge coating system, the paint circulation replenishing container 8 can store diluent. As Figure 3 shown, the diluent in the paint circulation replenishing container 8 can reach the spray head 11 through the replenishing pipe 81. For example, the diluent in the paint circulation replenishing container 8 can flow down to the spray head 11 under the action of gravity (the upper end of the replenishing pipe 81 is connected to the bottom of the paint circulation replenishing container 8), so as to supplement the diluent into the paint circulation. Specifically, the diluent can be directly supplemented into the oil return port 116, or the diluent can be supplemented into the paint injection port 110. When the paint circulation replenishing container 8 is connected to the paint injection port 110 of the spray head 11 through an oil circuit, the supplemented diluent is mixed into the paint and then absorbed by the oil return port 116 immediately after being sprayed out through the paint injection port 110. Thus, the supplemented diluent can flow back to the vacuum fuel tank 6, so as to supplement the diluent into the paint circulation, avoid the paint viscosity from being too high, and is conducive to the cyclic transportation of the paint. It also avoids the paint sprayed on the side of the board 97 from being too viscous, that is, it is conducive to the performance stability of the paint coated on the board 97, and can reduce the influence of the volatilization and loss of the diluent on the coating of the fireproof paint on the board 97. Thus, it is beneficial to improve the quality of the board product. Since a relatively strong negative pressure is formed at the fuel tank suction port 61 when the exhaust fan 7 operates, the flow rate of the air flow from the oil return port 116 to the fuel tank suction port 61 is relatively large. The supplemented diluent after entering the oil return port 116 will be dispersed by the air flow. Thus, the supplemented diluent can be well mixed with the recovered paint.

[0031] More specifically, the fuel tank oil outlet end 64 is connected to a transition fuel tank 5. As Figure 1 shown, the oil transfer pump 4 pumps and transports the paint in the transition fuel tank 5 into the storage fuel tank 3. Since the oil transfer pump 4 is a diaphragm pump, for example, reference can be made to the "remotely controllable diaphragm pump" with the Chinese utility model patent publication number CN210195980U. The diaphragm pump is provided with a sealing ball. Thus, the oil transfer pump 4 has a one-way conduction characteristic. When the oil transfer pump 4 works, the suction force for pumping the paint is relatively large. Thus, the relatively small negative pressure in the transition fuel tank 5 will not cause the paint in the storage fuel tank 3 to flow back into the transition fuel tank 5. As Figure 11As shown, the transition fuel tank 5 is provided with a transition fuel tank stirring device 51. The motor assembly of the transition fuel tank stirring device 51 is arranged outside the top of the transition fuel tank 5, and the stirring impeller of the transition fuel tank stirring device 51 is arranged inside the transition fuel tank 5. The motor assembly of the transition fuel tank stirring device 51 drives the stirring impeller of the transition fuel tank stirring device 51 to rotate, as Figure 1 shown, the storage fuel tank 3 is provided with a storage fuel tank stirring device 31.

[0032] Furthermore, as Figures 6 to 9 shown, the oil injection port 110 includes a left oil injection groove 111, a right oil injection groove 112, an upper oil injection groove 113 and a lower oil injection groove 114. The left oil injection groove 111 is arranged on the left side of the oil return port 116, the right oil injection groove 112 is arranged on the right side of the oil return port 116, the upper oil injection groove 113 is arranged on the upper side of the oil return port 116, and the lower oil injection groove 114 is arranged on the lower side of the oil return port 116. In other words, the oil injection port 110 surrounds the outside of the oil return port 116. The oil injection port 110 is approximately in the shape of a long rectangle, and the oil return port 116 is rectangular. The distance from the lower edge of the upper oil injection groove 113 to the upper edge of the oil return port 116 can be 2 millimeters to 3 millimeters, as Figure 5 shown, the sheet material 97 is horizontally placed on the conveying plate chain of the sheet material edge coating equipment. The conveying plate chain belongs to the prior art. For example, reference can be made to the "wood straight edge banding equipment" with the Chinese invention patent application publication number CN108381729A. The length dimensions of the left oil injection groove 111 and the right oil injection groove 112 in the up and down direction are significantly larger than the thickness dimension of the sheet material 97. For example, the length dimension of the left oil injection groove 111 is more than 10 millimeters larger than the thickness dimension of the sheet material 97, and the length dimension of the oil return port 116 in the up and down direction is 4 millimeters to 5 millimeters larger than the length dimension of the left oil injection groove 111. The length dimension of the left oil injection groove 111 is equal to the length dimension of the right oil injection groove 112, as Figure 5As shown, in practical applications, specifically, the plate 97 is attached to the left paint spraying groove 111 and the right paint spraying groove 112. The paint sprayed from the upper paint spraying groove 113 is immediately sucked into the upper end of the oil return port 116, and the paint sprayed from the lower paint spraying groove 114 is immediately sucked into the lower end of the oil return port 116. Part of the paint sprayed from the left paint spraying groove 111 and the right paint spraying groove 112 adheres to the side of the plate 97, and the excess paint is also immediately sucked into the oil return port 116, which enables the paint to flow well along the four peripheral edges of the oil return port 116, avoiding obvious areas lacking paint flow at the edge of the oil return port 116, and thus avoiding the formation of dried paint at the edge of the oil return port 116. Compared with the prior art, the present invention is beneficial to improving the quality of the plate product. In other words, mainly the left paint spraying groove 111 and the right paint spraying groove 112 are used to coat the side of the plate 97, while the upper paint spraying groove 113 and the lower paint spraying groove 114 are mainly used to ensure good paint flow at the upper and lower ends of the oil return port 116. Since the spray nozzle 110 is the active oil outlet, it is not easy to form dried paint at the edges of the left paint spraying groove 111, the right paint spraying groove 112, the upper paint spraying groove 113 and the lower paint spraying groove 114.

[0033] Further, as Figures 7 to 9 shown, an oil return channel 1161 is formed in the spray head 11. The front end of the oil return channel 1161 communicates with the oil return port 116, and the rear end of the oil return channel 1161 penetrates through the spray head 11. The oil return channel 1161 and the oil return port 116 can be set with equal cross-sections to avoid forming a step between the oil return channel 1161 and the oil return port 116, which may prevent paint recovery. As Figure 4 shown, the spray head assembly 1 is provided with an oil return pipe 12, a spray head transverse movement driving cylinder 13, a spray head lifting adjustment screw 14 and a support 15. As Figure 1 shown, the lower end of the support 15 is installed on the bed 98 of the plate edge coating equipment. The spray head lifting adjustment screw 14 is rotatably connected to the support 15. The spray head lifting adjustment screw 14 is screwed with a lifting seat. The lifting seat is slidably connected with a transverse movement seat in the front and rear directions. The oil return pipe 12 is installed on the above-mentioned transverse movement seat. The rear end of the spray head 11 is installed and connected to the front end of the oil return pipe 12. As Figure 5 shown, and the oil return pipe 12 is aligned and communicated with the oil return channel 1161. The spray head transverse movement driving cylinder 13 drives the oil return pipe 12 and the spray head 11 to move back and forth. As Figures 7 to 9As shown, a left oil outlet channel 1111, a right oil outlet channel 1112, an upper oil outlet channel 1131 and a lower oil outlet channel 1114 are formed inside the nozzle 11. A left oil inlet hole 1151 and a right oil inlet hole 1152 are formed on the nozzle 11. The left oil inlet hole 1151 and the right oil inlet hole 1152 both extend in the up and down direction. The left oil spray groove 111 communicates with the left oil inlet hole 1151 through the left oil outlet channel 1111. Specifically, the front end of the left oil outlet channel 1111 communicates with the left oil spray groove 111, and the rear end of the left oil outlet channel 1111 communicates with the left oil inlet hole 1151. The right oil spray groove 112 communicates with the right oil inlet hole 1152 through the right oil outlet channel 1112. Specifically, the front end of the right oil outlet channel 1112 communicates with the right oil spray groove 112, and the rear end of the right oil outlet channel 1112 communicates with the right oil inlet hole 1152. The upper oil spray groove 113 communicates with the left oil inlet hole 1151 and the right oil inlet hole 1152 through the upper oil outlet channel 1131. Specifically, as Figure 6 Combined with Figure 8 shown, the width (in the left and right direction) of the upper oil outlet channel 1131 gradually decreases from the rear to the front, that is to say, the width of the rear end of the upper oil outlet channel 1131 is larger, so that the left rear end of the upper oil outlet channel 1131 can communicate with the left oil inlet hole 1151, and the right rear end of the upper oil outlet channel 1131 can communicate with the right oil inlet hole 1152. The lower oil spray groove 114 communicates with the left oil inlet hole 1151 and the right oil inlet hole 1152 through the lower oil outlet channel 1114. The lower oil outlet channel 1114 is symmetrically arranged with the upper oil outlet channel 1131 about the center of the oil return port 116. As Figure 8 shown, an oil return channel 1161 is arranged between the left oil inlet hole 1151 and the right oil inlet hole 1152. Thus, the left oil outlet channel 1111, the right oil outlet channel 1112, the upper oil outlet channel 1131 and the lower oil outlet channel 1114 are combined to surround the oil return channel 1161. By setting the above-mentioned communication structure between the left oil inlet hole 1151 and the right oil inlet hole 1152 and the oil spray port 110, it is beneficial to make the oil spray port 110 spray oil more evenly, and the internal position of the nozzle 11 is reasonably utilized.

[0034] Furthermore, as Figure 5 and Figure 7As shown in the figure, the left oil outlet channel 1111, the right oil outlet channel 1112, the upper oil outlet channel 1131 and the lower oil outlet channel 1114 are arranged to gradually converge from the rear to the front. That is to say, the left oil outlet channel 1111, the right oil outlet channel 1112, the upper oil outlet channel 1131 and the lower oil outlet channel 1114 all gradually approach the oil return channel 1161 from the rear to the front. Therefore, when the paint flowing forward through the left oil outlet channel 1111 is discharged forward from the left spray trough 111, the paint has a rightward velocity, making it easier for the paint to bypass the front end face of the nozzle 11 and reach the oil return port 116 located on the right side of the left spray trough 111. Similarly, when the paint flowing forward through the upper oil outlet channel 1131 is discharged forward from the upper spray trough 113, the paint has a downward velocity, making it easier for the paint to bypass the front end face of the nozzle 11 and reach the oil return port 116 located below the upper spray trough 113. This is conducive to the paint being easily recovered into the oil return port 116, avoiding the paint from easily leaking to the outside of the spray port 110 (the oil return port 116 is located inside the spray port 110) and causing dry paint to form outside the spray port 110.

[0035] Furthermore, as Figure 8 shown, the left oil inlet hole 1151 and the right oil inlet hole 1152 penetrate through the nozzle 11. Thus, the paint can be input into the left oil inlet hole 1151 from the upper and lower ends of the left oil inlet hole 1151 respectively, and the paint can be input into the right oil inlet hole 1152 from the upper and lower ends of the right oil inlet hole 1152 respectively, which is conducive to the upper oil outlet channel 1131 and the lower oil outlet channel 1141 obtaining the paint evenly on average. That is to say, if the lower end of the left oil inlet hole 1151 is closed, and the paint is input through the upper end of the left oil inlet hole 1151, it may cause the lower oil outlet channel 1141 not to obtain sufficient paint flow rate.

[0036] Furthermore, as Figure 3 shown, the left oil inlet hole 1151 and the right oil inlet hole 1152 are connected to the output end of the oil supply pump 2 through a five-way pipe fitting 22. The five-way pipe fitting 22 belongs to the prior art. For example, reference can be made to the "Five-way Pipe Fitting" with the Chinese Utility Model Patent Publication No. CN202719316U. The output end of the oil supply pump 2 is connected to the five-way pipe fitting 22 through an oil supply pipe 21. The five-way pipe fitting 22 is respectively connected to the upper end, the lower end, the upper end and the lower end of the left oil inlet hole 1151 and the right oil inlet hole 1152 through four branch pipes 23. Thus, only one oil supply pump 2 can be set to make the left oil inlet hole 1151 and the right oil inlet hole 1152 obtain relatively even oil supply simultaneously.

[0037] Furthermore, as Figure 5 and Figure 9 shown, a liquid supplement hole 117 is formed on the nozzle 11. The lower end of the liquid supplement hole 117 communicates with the upper oil outlet channel 1131, and the upper end of the liquid supplement hole 117 is connected to the paint circulation liquid supplement container 8 through an oil circuit, as Figure 5As shown, specifically, the diluent in the paint circulation replenishing container 8 can flow into the replenishing hole 117, and then the diluent enters the upper oil outlet channel 1131. The diluent and the paint input into the upper oil outlet channel 1131 by the supply oil pump 2 are sprayed out through the upper spray tank 113 and then immediately sucked into the upper end part of the oil return port 116. Then, the air flow disperses the diluent, enabling the diluent to be well mixed with the recycled paint. Since the replenished diluent turns and flows during the process of flowing out of the upper spray tank 113 and then reaching the oil return port 116, when the diluent flows through the upper edge corner position of the oil return port 116, it is unfolded by the above-mentioned corner position, which is conducive to the diluent being easily dispersed by the air flow. Since the upper spray tank 113 is located above the oil return port 116, the diluent also flows downward to the oil return port 116 due to the action of gravity, so it is more difficult for the diluent to leak upward; as Figure 5 shown, and because the plate 97 blocks the middle position of the oil return port 116 in the up and down direction, the actual ventilation cross-sectional area of the oil return port 116 is relatively small. Therefore, the air flow velocity at the oil return port 116 is relatively large, so the diluent is easily dispersed by the air flow when flowing through the oil return port 116; since the ventilation cross-sectional areas of the oil return channel 1161 and the oil return pipe 12 are relatively large, directly injecting the diluent into the oil return channel 1161 or the oil return pipe 12 will relatively result in the diluent not being easily dispersed by the air flow.

[0038] Furthermore, as Figure 5 、 Figure 8 and Figure 9 shown, the rear end of the upper oil outlet channel 1131 is connected to the left oil inlet hole 1151 and the right oil inlet hole 1152, and the lower end of the replenishing hole 117 is connected to the front end part of the upper oil outlet channel 1131. Therefore, the replenishing hole 117 is relatively far from the left oil inlet hole 1151 and the right oil inlet hole 1152. And because the flow rate of the replenished diluent is relatively small, when a relatively large flow rate of paint is input into the upper oil outlet channel 1131 and then mixed with the replenished diluent, it can prevent the replenished diluent from flowing back to the left oil inlet hole 1151 and the right oil inlet hole 1152, thus avoiding the diluent being directly sprayed onto the side of the plate 97. As shown in the above text and Figure 5 shown, since the length dimension of the oil return port 116 in the up and down direction is significantly larger than the thickness dimension of the plate 97, the replenished diluent sprayed out from the upper spray tank 113 basically does not contact the plate 97. Therefore, the replenished diluent passes through the vacuum oil tank 6 and then reaches the storage tank 3. During this period, the replenished diluent has been well mixed into the circulating paint.

[0039] Furthermore, as Figure 10As shown, the edge coating system for fireproof boards of the present invention further includes a replenishing metering pump 9. The input end of the replenishing metering pump 9 is connected to the paint circulation replenishing container 8, and the output end of the replenishing metering pump 9 is connected to the upper end of the replenishing hole 117. That is to say, a replenishing metering pump 9 is provided on the replenishing pipe 81. The replenishing metering pump 9 can be installed inside or outside the paint circulation replenishing container 8. The replenishing metering pump 9 can refer to, for example, "A diaphragm metering pump" with the Chinese utility model patent publication number CN204458276U and "Digital pneumatic double diaphragm metering pump" with the Chinese utility model patent publication number CN212079589U. The replenishing metering pump 9 extracts the diluent in the paint circulation replenishing container 8, and the replenishing metering pump 9 actively injects the diluent into the nozzle 11. By setting the replenishing metering pump 9, the flow rate of the diluent replenished into the paint circulation can be adjusted. For example, when the thickness of the board 97 is relatively large, the output flow rate of the oil supply pump 2 needs to be set larger. Correspondingly, the replenishing metering pump 9 is adjusted to output a larger flow rate.

[0040] Further, as Figure 2 and Figure 3 shown, the edge coating system for fireproof boards of the present invention further includes a container support 82 for installing and connecting the pressing beam 99 of the board edge coating device. The paint circulation replenishing container 8 is arranged on the container support 82. The paint circulation replenishing container 8 can be welded to the container support 82. The container support 82 is installed and connected to the pressing beam 99 through corresponding screws. The pressing beam 99 is located above the conveying plate chain. A pressing wheel is provided at the lower end of the pressing beam 99, and the pressing wheel presses against the board 97. The conveying plate chain supports the board 97. Since the pressing beam 99 is relatively close to the nozzle 11, the paint circulation replenishing container 8 can be relatively close to the nozzle 11, which is beneficial to shortening the diluent conveying path from the paint circulation replenishing container 8 to the nozzle 11 and is beneficial to reducing the load of the replenishing metering pump 9.

[0041] The paint adjustment method using the above-mentioned edge coating system for fireproof boards of the present invention includes the following steps: Step S1, adding paint to the fuel tank 3 and adding diluent to the paint circulation replenishing container 8; Step S2, operating the oil supply pump 2 and the exhaust fan 7 to form a paint circulation; Step S3, enabling the diluent in the paint circulation replenishing container 8 to be input into the nozzle 11 through the corresponding oil path, so that the diluent as a supplement can be replenished into the paint circulation. The diluent as a supplement can be well mixed with the recycled paint, thus adjusting the viscosity of the paint and avoiding excessive paint viscosity, which is beneficial to improving the quality of board products.

Claims

1. A fireproof board edge coating system, comprising a nozzle assembly (1), the nozzle assembly (1) being provided with a nozzle (11), the front end of the nozzle (11) being provided with an oil injection port (110) and an oil return port (116), the position of the oil injection port (110) corresponding to the oil return port (116), characterized in that: The invention also comprises an oil supply pump (2), an oil storage tank (3), a vacuum oil tank (6), an exhaust fan (7) and a paint circulation refilling container (8); the vacuum oil tank (6) is provided with an oil tank suction port (61) and an oil tank oil outlet (64); the output end of the oil supply pump (2) is connected to the oil injection port (110); the oil storage tank (3) is respectively connected to the input end of the oil supply pump (2) and the oil tank oil outlet (64) by oil circuits; the oil return port (116) is connected to the oil tank suction port (61); the vacuum oil tank (6) is provided with an oil tank air outlet (63); the air inlet end of the exhaust fan (7) is connected to the oil tank air outlet (63); and the paint circulation refilling container (8) is connected to the spray head (11) by oil circuits.

2. The fireproof board edge coating system according to claim 1, characterized in that: The oil injection port (110) comprises a left oil injection groove (111), a right oil injection groove (112), an upper oil injection groove (113) and a lower oil injection groove (114); the left oil injection groove (111) is arranged on the left side of the oil return port (116); the right oil injection groove (112) is arranged on the right side of the oil return port (116); the upper oil injection groove (113) is arranged on the upper side of the oil return port (116); and the lower oil injection groove (114) is arranged on the lower side of the oil return port (116).

3. The fireproof board edge coating system according to claim 2, characterized in that: An oil return passage (1161) is formed in the spray head (11), the front end of the oil return passage (1161) is connected to the oil return port (116), and the rear end of the oil return passage (1161) passes through the spray head (11), a left oil outlet passage (1111), a right oil outlet passage (1112), an upper oil outlet passage (1131) and a lower oil outlet passage (1114) are formed in the spray head (11), and a left oil inlet hole (1151) and a right oil inlet hole (1152) are formed on the spray head (11), and the left oil inlet hole (1151) and the right oil inlet hole (1152) are both extended in the up-down direction, and the left spray groove (111) is formed through The left oil outlet passage (1111) is connected to the left oil inlet hole (1151); the right oil spray groove (112) is connected to the right oil inlet hole (1152) via the right oil outlet passage (1112); the upper oil spray groove (113) is connected to the left oil inlet hole (1151) and the right oil inlet hole (1152) via the upper oil outlet passage (1131); the lower oil spray groove (114) is connected to the left oil inlet hole (1151) and the right oil inlet hole (1152) via the lower oil outlet passage (1114); and the oil return passage (1161) is provided between the left oil inlet hole (1151) and the right oil inlet hole (1152).

4. The fireproof board edge coating system according to claim 3, characterized in that: The left oil outlet passage (1111), the right oil outlet passage (1112), the upper oil outlet passage (1131) and the lower oil outlet passage (1114) are arranged to gradually approach each other from the back to the front.

5. The fireproof board edge coating system according to claim 4, characterized in that: The left oil inlet hole (1151) and the right oil inlet hole (1152) penetrate the spray head (11), and the left oil inlet hole (1151) and the right oil inlet hole (1152) are connected to the output end of the oil supply pump (2) via a five-way pipe fitting (22).

6. The fireproof board edge coating system according to any one of claims 3 to 5, characterized in that: The spray head (11) is formed with a liquid replenishing hole (117), the lower end of the liquid replenishing hole (117) being connected to the upper oil outlet passage (1131), and the upper end of the oil passage of the liquid replenishing hole (117) being connected to the paint circulation liquid replenishing container (8).

7. The fireproof board edge coating system according to claim 6, characterized in that: The rear end of the upper oil outlet channel (1131) is connected to the left oil inlet hole (1151) and the right oil inlet hole (1152), and the lower end of the liquid replenishing hole (117) is connected to the front end of the upper oil outlet channel (1131).

8. The fireproof board edge coating system according to claim 7, characterized in that: It also comprises a liquid replenishment metering pump (9), the input end of the liquid replenishment metering pump (9) being connected to the paint circulation liquid replenishment container (8), and the output end of the liquid replenishment metering pump (9) being connected to the upper end of the liquid replenishment hole (117).

9. The fireproof board edge coating system according to claim 8, characterized in that: It also includes a container bracket (82) for mounting the connecting pressure beam (99), and the paint circulation liquid replenishing container (8) is arranged on the container bracket (82).

10. A paint adjustment method using the fireproof board edge coating system according to any one of claims 1 to 9, characterized in that: The steps include: Step S1, adding paint into the oil storage tank (3), and adding diluent into the paint circulation refilling container (8); Step S2, operating the oil supply pump (2) and the exhaust fan (7) to form a paint circulation; Step S3, the diluent in the paint circulation replenishment container (8) is input into the spray head (11) through the corresponding oil path.

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