Anti-dry edge coating spray head for fireproof plate

Abstract

The utility model discloses a fireproof plate anti-dry edge coating nozzle which comprises a nozzle body, the front end of the nozzle body is provided with an oil injection port and an oil return port, the oil injection port comprises a left oil injection tank, a right oil injection tank, an upper oil injection tank and a lower oil injection tank, the left oil injection tank is arranged on the left side of the oil return port, and the right oil injection tank is arranged on the right side of the oil return port. The upper oil spraying groove is formed in the upper side of the oil return opening, and the lower oil spraying groove is formed in the lower side of the oil return opening. According to the utility model, dry and solid paint can be prevented from being easily accumulated at the edge of the oil return port, so that the spray head is beneficial to improving the quality of plate products.

Description

Technical Field

[0001] This utility model relates to the field of spray nozzles for edge coating equipment of sheet metal, and specifically to a fireproof sheet metal edge coating nozzle for preventing dry coating. Background Technology

[0002] Currently, edge coating equipment for boards is used to coat and seal the sides of boards with paint, such as the "Fully Automatic Digital Edge Sealing Machine and its Edge Sealing Process" in Chinese Utility Model Patent Publication No. CN110576497B and the "Edge Coating Sanding Machine" in Chinese Utility Model Patent Publication No. CN110548662B. The edge coating equipment for sheet metal is equipped with a sheet metal edge coating system, which includes a nozzle device for spraying paint onto the side of the sheet metal. For example, the "Quick-Change Nozzle Device" in Chinese Utility Model Patent Publication No. CN212596661U has an oil spray hole and an oil suction hole at the front end of the nozzle device. The oil spray hole and the oil suction hole are set close to each other. In the working state, the front end of the nozzle mold is close to the edge of the sheet metal, and the oil is sprayed onto the edge of the sheet metal through the oil spray hole. Excess oil is sucked away by the oil suction hole. In order to save paint, the excess oil is sucked away by the oil suction hole and recycled to the vacuum oil tank. The oil supply pump delivers the recycled paint in the vacuum oil tank back to the oil spray hole, thus forming a paint circulation. In the paint circulation, an oil storage tank is set between the oil supply pump and the vacuum oil tank. When the liquid level in the oil storage tank drops to a certain level, the worker replenishes the oil storage tank with fire-retardant paint (with a certain formula). Currently, edge coating equipment for sheet materials typically uses UV paint. Therefore, after the UV paint is sprayed onto the side of the sheet material by the spray nozzle, it needs to undergo UV curing and drying. This can be referenced in Chinese Utility Model Patent Publication No. CN110548662B, "An Edge Coating Sanding Machine." However, the fire resistance of the cured UV paint is poor. Therefore, a sheet material with better fire resistance needs to be produced. This requires coating the side of the sheet material with fire-retardant paint, followed by drying the fire-retardant paint using edge coating equipment. The fire-retardant paint contains a thinner. Existing spray nozzle devices, such as the "Quick-Change Spray Nozzle Device" in Chinese Utility Model Patent Publication No. CN212596661U, have a single-slit spray nozzle with suction holes on both sides. This results in good paint flow on only one side of the suction hole. When using UV paint, which requires UV irradiation to cure, no dried paint clumps form at the spray nozzle. However, because the thinner in fire-retardant paint is relatively volatile, dried paint clumps easily form on one side of the suction hole. For example, the left edge of the suction hole located to the left of the spray nozzle lacks paint flow. A small amount of paint splashed onto the left edge of the suction hole, due to its poor flowability, cannot be replenished by the thinner in the paint in time, and easily forms dried paint clumps on the left edge of the suction hole. The gradual accumulation of dried paint leads to blockage. The dried paint clumps can also come into contact with the sides of the board, affecting the normal application of paint to the sides of the board and thus hindering the improvement of the product quality. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a fireproof board anti-dry coating edge spray nozzle, which is beneficial to improving the quality of board products.

[0004] The objective of this utility model is achieved through the following technical solution.

[0005] The fireproof board anti-drying coating nozzle disclosed in this utility model includes a nozzle body. The front end of the nozzle body is provided with an oil spray port and an oil return port. The oil spray port includes a left oil spray groove, a right oil spray groove, an upper oil spray groove and a lower oil spray groove. The left oil spray groove is located to the left of the oil return port, the right oil spray groove is located to the right of the oil return port, the upper oil spray groove is located above the oil return port, and the lower oil spray groove is located below the oil return port.

[0006] Preferably, a return oil channel is formed within the nozzle body, the front end of the return oil channel is connected to the return oil port, and the rear end of the return oil channel penetrates through the nozzle body. A left oil outlet channel, a right oil outlet channel, an upper oil outlet channel, and a lower oil outlet channel are formed within the nozzle body. A left oil inlet hole and a right oil inlet hole are formed on the nozzle body. Both the left oil inlet hole and the right oil inlet hole extend in the vertical direction. The left spray groove is connected to the left oil inlet hole through the left oil outlet channel. The right spray groove is connected to the right oil inlet hole through the right oil outlet channel. The upper spray groove is connected to the left oil inlet hole and the right oil inlet hole through the upper oil outlet channel. The lower spray groove is connected to the left oil inlet hole and the right oil inlet hole through the lower oil outlet channel. The return oil channel is located between the left oil inlet hole and the right oil inlet hole.

[0007] Preferably, the left oil outlet, right oil outlet, upper oil outlet, and lower oil outlet are arranged to gradually approach each other from back to front.

[0008] Preferably, the left oil inlet and the right oil inlet penetrate the nozzle body.

[0009] Preferably, the front end of the nozzle body is gradually narrowed from back to front.

[0010] Compared with the prior art, the advantages of this utility model are as follows: by setting the oil spray nozzle to include a left oil spray groove, a right oil spray groove, an upper oil spray groove, and a lower oil spray groove, with the left oil spray groove located on the left side of the return oil port, the right oil spray groove located on the right side of the return oil port, the upper oil spray groove located on the upper side of the return oil port, and the lower oil spray groove located on the lower side of the return oil port, it is possible to avoid the easy formation of dried paint at the edge of the return oil port. Therefore, the nozzle of this utility model is conducive to improving the quality of board products. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the nozzle assembly of this utility model.

[0012] Figure 2 This is a partial structural diagram of a board edge coating equipment equipped with the fireproof board anti-drying coating nozzle of this utility model.

[0013] Figure 3 for Figure 2 A partial structural diagram at point A.

[0014] Figure 4 This is a cross-sectional view of the nozzle assembly of this utility model.

[0015] Figure 5 This is a frontal three-dimensional structural diagram of the nozzle body of this utility model.

[0016] Figure 6 This is a horizontal cross-sectional three-dimensional structural diagram of the nozzle body of this utility model.

[0017] Figure 7 This is a cross-sectional view of the nozzle body of this utility model from the rear view.

[0018] Labeling: Nozzle assembly 1; Nozzle body 11; Injection port 110; Left injection groove 111; Left oil outlet 1111; Right injection groove 112; Right oil outlet 1121; Upper injection groove 113; Upper oil outlet 1131; Lower injection groove 114; Lower oil outlet 1141; Left oil inlet 1151; Right oil inlet 1152; Return port 116; Return channel 1161; Return pipe 12; Suction pipe 121; Nozzle transverse movement drive cylinder 13; Nozzle lifting adjustment screw 14; Support 15; Oil supply pump 2; Oil supply pipe 21; Five-way fitting 22; Branch pipe 23; Exhaust fan 7; Pressure beam 99; Bed 98; Plate 97. Detailed Implementation

[0019] The present invention will now be further described with reference to the accompanying drawings.

[0020] This utility model relates to a fireproof board anti-dry coating edge spray nozzle, such as... Figure 5The nozzle includes a nozzle body 11. The front end of the nozzle body 11 is provided with an injection port 110 and an oil return port 116. The injection port 110 includes a left injection groove 111, a right injection groove 112, an upper injection groove 113, and a lower injection groove 114. The left injection groove 111 is located to the left of the oil return port 116, the right injection groove 112 is located to the right of the oil return port 116, the upper injection groove 113 is located above the oil return port 116, and the lower injection groove 114 is located below the oil return port 116. In other words, the injection port 110 surrounds the outside of the oil return port 116. The injection port 110 is approximately rectangular, and the oil return port 116 is rectangular. The distance from the lower edge of the upper injection groove 113 to the upper edge of the oil return port 116 can be 2 mm to 3 mm, and the distance from the right edge of the left injection groove 111 to the left edge of the oil return port 116 can be 2 mm to 3 mm.

[0021] like Figures 2 to 4 As shown, the edge coating equipment for sheet metal is equipped with an oil supply pump 2 and an exhaust fan 7. For an example of the structural principle of the exhaust fan 7, please refer to the "An Adjustable Pressure Vortex Fan" in Chinese Utility Model Patent Publication No. CN209340185U or the "A High Pressure Fan" in Chinese Utility Model Patent Publication No. CN217926384U. The input end of the oil supply pump 2 is connected to the oil storage tank, and the output end of the oil supply pump 2 is connected to the oil spray port 110. The air inlet end of the exhaust fan 7 is connected to the oil return pipe 12 through the suction pipe 121. The oil return pipe 12 is connected to the oil return port 116. Therefore, when the exhaust fan 7 is working, a negative pressure is formed at the oil return port 116. The board 97 is placed horizontally on the conveyor chain of the board edge coating equipment. An example of the conveyor chain can be found in Chinese Utility Model Patent Application Publication No. CN108381729A, entitled "A Straight-Line Edge Sealing Device for Wood". The pressure beam 99 is located above the conveyor chain, and a pressure roller is provided at the lower end of the pressure beam 99. The pressure roller presses against the board 97, and the conveyor chain supports the board 97. Figure 4 As shown, the length of the left fuel injection slot 111 and the right fuel injection slot 112 in the vertical direction is significantly greater than the thickness of the sheet metal 97. For example, the length of the left fuel injection slot 111 is more than 10 mm greater than the thickness of the sheet metal 97, and the length of the return port 116 in the vertical direction is 4 mm to 5 mm greater than the length of the left fuel injection slot 111. The length of the left fuel injection slot 111 is equal to the length of the right fuel injection slot 112. Figure 4As shown, in practical applications, the board 97 is attached to the left spray nozzle 111 and the right spray nozzle 112. Paint sprayed from the upper spray nozzle 113 is immediately drawn into the upper end of the return nozzle 116, and paint sprayed from the lower spray nozzle 114 is immediately drawn into the lower end of the return nozzle 116. Some of the paint sprayed from the left and right spray nozzles 111 and 112 adheres to the side of the board 97, while excess paint is also drawn into the return nozzle 116. This ensures that the paint flows well around the edges of the return nozzle 116, preventing areas with significantly insufficient paint flow at the edges of the return nozzle 116. This design avoids the easy formation of dried paint at the edge of the return oil port 116, which would affect the paint application to the side of the board 97. Compared with the prior art, this invention is beneficial to improving the quality of the board product. In other words, the left spray groove 111 and the right spray groove 112 are mainly used to coat the side of the board 97, while the upper spray groove 113 and the lower spray groove 114 are mainly used to ensure good paint flow at the upper and lower ends of the return oil port 116. Since the spray nozzle 110 is an active oil outlet, the edges of the left spray groove 111, the right spray groove 112, the upper spray groove 113 and the lower spray groove 114 are not prone to dried paint formation.

[0022] Furthermore, such as Figure 4 , Figure 6 and Figure 7 As shown, an oil return channel 1161 is formed inside the nozzle body 11. The front end of the oil return channel 1161 connects to the oil return port 116, and the rear end of the oil return channel 1161 penetrates through the nozzle body 11. The oil return channel 1161 and the oil return port 116 can be set with equal cross-sections to avoid the formation of a step between the oil return channel 1161 and the oil return port 116, which would hinder paint recovery. Figure 1 As shown, the nozzle assembly 1 includes an oil return pipe 12, a nozzle transverse drive cylinder 13, a nozzle lifting and adjusting screw 14, and a support 15. Figure 2 and Figure 3 As shown, the lower end of the support 15 is mounted on the bed 98 of the sheet metal edge coating equipment, as... Figure 1 As shown, the nozzle lifting adjustment screw 14 is rotatably connected to the support 15. A lifting seat is screwed onto the nozzle lifting adjustment screw 14. A transverse sliding seat is slidably connected to the lifting seat. The oil return pipe 12 is installed on the transverse sliding seat. The rear end of the nozzle body 11 is connected to the front end of the oil return pipe 12. Figure 5 As shown, the return oil pipe 12 is directly connected to the return oil passage 1161, and the nozzle lateral movement drive cylinder 13 drives the return oil pipe 12 and the nozzle body 11 to move back and forth. Figure 4 , Figure 6 and Figure 7As shown, the nozzle body 11 has 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. The nozzle body 11 has a left oil inlet hole 1151 and a right oil inlet hole 1152, both extending vertically. The left oil inlet channel 111 is connected to the left oil inlet hole 1151 via the left oil outlet channel 1111. Specifically, the front end of the left oil outlet channel 1111... The left fuel injection slot 111 is connected, and the rear end of the left fuel outlet 1111 is connected to the left fuel inlet 1151. The right fuel injection slot 112 is connected to the right fuel inlet 1152 through the right fuel outlet 1112. Specifically, the front end of the right fuel outlet 1112 is connected to the right fuel injection slot 112, and the rear end of the right fuel outlet 1112 is connected to the right fuel inlet 1152. The upper fuel injection slot 113 is connected to the left fuel inlet 1151 and the right fuel inlet 1152 through the upper fuel outlet 1131. Specifically, as shown... Figure 5 Combination Figure 7 As shown, the width of the upper oil outlet passage 1131 (in the left-right direction) gradually decreases from back to front, meaning that the rear end of the upper oil outlet passage 1131 is wider, thus allowing the left rear end of the upper oil outlet passage 1131 to connect to the left oil inlet 1151, and the right rear end of the upper oil outlet passage 1131 to connect to the right oil inlet 1152. The lower oil injection groove 114 connects to the left oil inlet 1151 and the right oil inlet 1152 through the lower oil outlet passage 1114. The lower oil outlet passage 1114 and the upper oil outlet passage 1131 are symmetrical about the center of the return port 116. Figure 5 and Figure 6 As shown, the return oil passage 1161 is located between the left oil inlet 1151 and the right oil inlet 1152. Thus, the left oil outlet 1111, right oil outlet 1112, upper oil outlet 1131, and lower oil outlet 1114 surround the return oil passage 1161. By establishing the aforementioned connection structure between the left oil inlet 1151 and right oil inlet 1152 and the fuel injector 110, it is beneficial for the fuel injector 110 to spray oil more evenly, and the internal space of the nozzle body 11 is rationally utilized.

[0023] Furthermore, such as Figure 4 and Figure 6As shown, the left oil outlet 1111, right oil outlet 1112, upper oil outlet 1131, and lower oil outlet 1114 are arranged to gradually converge from back to front. That is to say, the left oil outlet 1111, right oil outlet 1112, upper oil outlet 1131, and lower oil outlet 1114 all gradually approach the return oil channel 1161 from back to front. Therefore, when the paint flowing forward through the left oil outlet 1111 is discharged forward from the left spray tank 111, the paint has a rightward velocity, making it easier for the paint to bypass the front end face of the nozzle body 11 and reach the left spray tank. Similarly, when the paint flowing forward through the upper oil outlet 1131 is discharged forward from the upper spray tank 113, the paint has a downward velocity, making it easier for the paint to bypass the front end face of the nozzle body 11 and reach the oil return port 116 located on the lower side of the upper spray tank 113. This facilitates the paint to be easily collected back into the oil return port 116, preventing the paint from easily leaking to the outside of the spray nozzle 110 (the oil return port 116 is located on the inside of the spray nozzle 110) and causing the paint to harden on the outside of the spray nozzle 110.

[0024] Furthermore, such as Figure 7 As shown, the left oil inlet 1151 and the right oil inlet 1152 penetrate the nozzle body 11, so that paint can be input from the upper and lower ends of the left oil inlet 1151 respectively, and paint can be input from the upper and lower ends of the right oil inlet 1152 respectively. This is beneficial for the upper oil outlet 1131 and the lower oil outlet 1141 to obtain paint evenly. In other words, if the lower end of the left oil inlet 1151 is closed, the paint will enter through the upper end of the left oil inlet 1151, which may result in the lower oil outlet 1141 not obtaining sufficient paint flow.

[0025] like Figure 3 As shown, the left oil inlet 1151 and the right oil inlet 1152 are connected to the output end of the oil supply pump 2 through a five-way fitting 22. The five-way fitting 22 is a prior art. For example, refer to the "A Five-Way Fitting" in Chinese Utility Model Patent Publication No. CN202719316U. The output end of the oil supply pump 2 is connected to the five-way fitting 22 through an oil supply pipe 21. The five-way fitting 22 is connected to the upper end of the left oil inlet 1151, the lower end of the left oil inlet 1151, the upper end of the right oil inlet 1152, and the lower end of the right oil inlet 1152 through four branch pipes 23, respectively. Thus, only one oil supply pump 2 is needed to ensure that the left oil inlet 1151 and the right oil inlet 1152 receive relatively even oil supply at the same time.

[0026] Furthermore, such as Figure 5As shown, the front end of the nozzle body 11 gradually narrows from back to front, meaning the width "W" of the front end of the nozzle body 11 gradually decreases from back to front. Since the left oil outlet 1111, right oil outlet 1112, upper oil outlet 1131, and lower oil outlet 1114 gradually converge from back to front, the gradual narrowing of the front end of the nozzle body 11 from back to front does not affect the arrangement of the left oil outlet 1111 and right oil outlet 1112. Figure 5 As shown, because the front end of the nozzle body 11 is narrow, the area that the front end of the nozzle body 11 can be splashed with paint in the left and right directions is small, which can prevent dried paint blocks from accumulating on the front end of the nozzle body 11.

Claims

1. A fireproof board dry edge coating preventing spray head, characterized in that: The oil injection head body (11) is provided with an oil injection port (110) and an oil return port (116) at the front end thereof, 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 at the left side of the oil return port (116), the right oil injection groove (112) is arranged at the right side of the oil return port (116), the upper oil injection groove (113) is arranged at the upper side of the oil return port (116), and the lower oil injection groove (114) is arranged at the lower side of the oil return port (116).

2. The edge coating nozzle for fireproof panels according to claim 1, characterized in that: An oil return channel (1161) is formed in the oil injection head body (11), the front end of the oil return channel (1161) is communicated with the oil return port (116), the rear end of the oil return channel (1161) penetrates the oil injection head body (11), 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 in the oil injection head body (11), a left oil inlet hole (1151) and a right oil inlet hole (1152) are formed on the oil injection head body (11), the left oil inlet hole (1151) and the right oil inlet hole (1152) are arranged in the up-down direction, the left oil injection groove (111) is communicated with the left oil inlet hole (1151) through the left oil outlet channel (1111), the right oil injection groove (112) is communicated with the right oil inlet hole (1152) through the right oil outlet channel (1112), the upper oil injection groove (113) is communicated with the left oil inlet hole (1151) and the right oil inlet hole (1152) through the upper oil outlet channel (1131), the lower oil injection groove (114) is communicated with the left oil inlet hole (1151) and the right oil inlet hole (1152) through the lower oil outlet channel (1114), and the oil return channel (1161) is arranged between the left oil inlet hole (1151) and the right oil inlet hole (1152).

3. The edge coating nozzle for fireproof panels according to claim 2, characterized in that: 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 gradually arranged close to each other from the rear to the front.

4. The edge coating nozzle for fireproof panels according to claim 3, characterized in that: The left oil inlet hole (1151) and the right oil inlet hole (1152) penetrate the oil injection head body (11).

5. A fireproof panel dry-coating edge nozzle according to claim 3 or 4, characterized in that: The front end of the oil injection head body (11) is gradually narrowed from the rear to the front.

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