Leakage-proof device for spray gun of coating machine

Abstract

The utility model relates to a coating machine spray gun liquid leakage prevention device which comprises a coating pan, a spray gun, a pneumatic air induction check valve, a spray gun frame, a hot air pipe main pipe, a hot air pipe branch pipe, a compressed air pipe and a coating liquid pipe. The pneumatic air induction check valve is arranged between the coating liquid pipeline and the spray gun, so that the coating liquid is prevented from dropping and leaking in the spray gun, and the product quality is better ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a liquid leakage prevention device for a spray gun of a coating machine. Background Art

[0002] The coating machine is widely used in pharmaceutical, chemical, food, pill sugar coating, polishing and rolling food. It mainly rotates the coating pot clockwise to make the pill core tumble in the pot. The coating liquid enters the spray gun set up in the coating pot through the pipeline. The spray gun atomizes the coating liquid and sprays it on the pills rotating in the coating pot. In the prior art, the coating liquid is stored in a pressure tank, and the coating liquid directly enters the spray gun through the pipeline. The spray gun is composed of a sanitary safety ball valve, a spray gun body and a nozzle. When spraying is required, compressed air is passed into the pressure tank, and the coating liquid stored in the pressure tank is pressurized and pressed into the spray gun for spraying. When the spraying stops, the compressed air stops entering the pressure tank, the pressure of the pressure tank decreases, and the spray gun stops spraying. During the spray gun closing process, the coating liquid remains in the spray gun. The residual coating liquid drips into the coating pot, which will cause the pill cores in the coating pot to stick together, affecting the product quality.

[0003] In summary, a spray gun is needed that can prevent liquid leakage when the spray gun stops spraying liquid, so as to ensure product quality. Summary of the invention

[0004] In order to solve the problem in the prior art that when the spray gun of a coating machine stops spraying liquid and the spray gun is closed, coating liquid remains in the spray gun, and the residual coating liquid drips into the coating pot, causing the meatballs in the coating pot to stick together, thereby affecting product quality, the utility model provides a coating machine spray gun anti-leakage device. The coating machine spray gun anti-leakage device has a simple structure. A pneumatic air induced check valve is installed between the coating liquid pipeline and the spray gun to prevent the coating liquid from dripping or leaking in the spray gun, thereby better ensuring product quality.

[0005] In order to achieve the above object, the technical solution of the utility model is as follows:

[0006] A coating machine spray gun anti-leakage device, the coating machine spray gun anti-leakage device comprises a coating pot, a spray gun, a pneumatic air induced check valve, a spray gun stand, a hot air pipe main pipe, a hot air pipe branch pipe, a compressed air pipe and a coating liquid pipe, the pneumatic air induced check valve is a T-shaped structure, the pneumatic air induced check valve is provided with an air inlet, a liquid inlet and a liquid outlet, the spray gun stand comprises a bracket, a first support rod, a first support block, a second support rod, at least one second support block and at least one third support rod, the coating pot is connected to a support seat, the bracket is vertically fixedly connected to the hot air pipe main pipe, and the first support rod is movably connected to the bracket The first support rod is arranged in parallel with the hot air pipe main pipe, the first support rod passes through the first support block, one end of the second support rod passes through the first support block, the other end of the second support rod passes through at least one second support block, the second support block is arranged in the coating pot, the third support rod passes through the second support block, the pneumatic air induced check valve is installed on the third support rod, the air inlet is connected to the compressed air pipe through a hose, the liquid inlet is connected to the coating liquid pipe through a hose, the liquid outlet is connected to the spray gun, the hot air pipe main pipe is connected to the hot air pipe branch pipe through a flange, and one end of the hot air pipe branch pipe extends into the coating pot.

[0007] Furthermore, the compressed air pipe is provided with a pressure gauge and a compressed air switch.

[0008] Furthermore, the coating liquid pipe is provided with a manual valve and a coating liquid switch.

[0009] Furthermore, a first three-way pipe is provided between the compressed air pipe and the air inlet.

[0010] Furthermore, a second three-way pipe is provided between the coating liquid pipe and the liquid inlet.

[0011] The features of this utility model are mainly reflected in:

[0012] The utility model provides a coating machine spray gun anti-leakage device, which has a simple structure and prevents coating liquid from dripping or leaking in the spray gun by installing a pneumatic air induced check valve between a coating liquid pipeline and the spray gun, thereby better ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the coating machine spray gun anti-leakage device of the utility model

[0014] Figure 2 This is a schematic diagram of the connection between the pneumatic air induced check valve and the spray gun of the utility model

[0015] Among them, the figure numbers are as follows: 1-coating pot, 11-support seat, 2-spray gun, 3-pneumatic air induced check valve, 31-air inlet, 32-liquid inlet, 33-nozzle, 4-spray gun stand, 41-bracket, 42-first support rod, 43-first support block, 44-second support rod, 45-second support block, 46-third support rod, 5-hot air pipe main pipe, 51-hot air pipe branch pipe, 6-compressed air pipe, 61-first three-way pipe, 62-pressure gauge, 63-compressed air switch, 7-coating liquid pipe, 71-manual valve, 72-second three-way pipe, 73-coating liquid switch. DETAILED DESCRIPTION

[0016] The following will be combined with the accompanying drawings of the structural schematic diagram of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] As shown in Figure (1), a coating machine spray gun anti-leakage device comprises a coating pot 1, a spray gun 2, a pneumatic air induced check valve 3, a spray gun frame 4, a hot air pipe main pipe 5, a hot air pipe branch pipe 51, a compressed air pipe 6 and a coating liquid pipe 7. The spray gun 2 is used to evenly spray the coating liquid on the pills in the coating pot. The pneumatic air induced check valve 3 can prevent the liquid remaining in the spray gun from dripping into the coating pot. The pneumatic air induced check valve 3 is a T-shaped structure. The pneumatic air induced check valve 3 is provided with an air inlet 31, a liquid inlet 32 ​​and a liquid outlet 33. The pneumatic air induced check valve 3 is provided with a plug 34 inside. The air inlet 31 is connected to compressed air, the liquid inlet 32 ​​is connected to the coating liquid, and the liquid outlet 33 is connected to the spray gun 2. When it is necessary to spray the coating liquid, the control box (not shown in the figure) controls the coating liquid pipe to enter the liquid, and the coating liquid enters the liquid inlet 32 ​​through the hose, and enters the spray gun 2 through the pneumatic air induced check valve 3 to coat the pills and spray them. When it is not necessary to spray the liquid, the control box controls the coating liquid to stop entering the liquid, and at this time, the air inlet 31 enters compressed air, and the compressed air is used to push the plug 34 inside the pneumatic air induced check valve 3 to block the liquid outlet 33, so as to prevent the liquid in the hose from remaining in the spray gun, so that the residual liquid leaks into the coating pot, causing the pills in the coating pot to stick together. The spray gun frame 4 includes a bracket 41, a first support rod 42, a first support block 43, a second support rod 44, at least one second support block 45 and at least one third Support rod 46, the coating pot 1 is connected to the support seat 11, the support seat 11 supports the coating pot 1 on the ground, the bracket 41 is vertically fixedly connected to the hot air pipe main pipe 5, the first support rod 42 is movably connected to the bracket 41, and is convenient for disassembly and cleaning, the first support rod 42 is arranged in parallel with the hot air pipe main pipe 5, the first support rod 42 passes through the first support block 43, one end of the second support rod 44 passes through the first support block 43, the low-value consumable support block 43 connects the first support rod 42 and the second support rod 44 together, the other end of the second support rod 44 passes through at least one second support block 45, the second support block 45 is arranged in the coating pot 1, and the third support rod 46 passes through the second support block 45 The second support block connects the second support rod 44 and the third support rod 46 together, and the support rods passing through the support block can be easily disassembled and cleaned. The pneumatic air induced check valve 3 is installed on the third support rod 46, and the air inlet 31 is connected to the compressed air pipe 6 through a hose, and the compressed air can enter the pneumatic air induced check valve 3 through the air inlet 31. The liquid inlet 32 ​​is connected to the coating liquid pipe 7 through a hose, and the coating liquid can enter the pneumatic air induced check valve 3 through the liquid inlet 32. The liquid outlet 33 is connected to the spray gun 2, and the coating liquid can enter the spray gun 2 through the liquid outlet 33. The hot air pipe main pipe 5 is connected to the hot air pipe branch pipe 51 through a flange, and one end of the hot air pipe branch pipe 51 extends into the coating pot 1.

[0018] The compressed air pipe 6 is provided with a pressure gauge 62, the coating liquid pipe 7 is provided with a manual valve 71, a first three-way pipe 61 is provided between the compressed air pipe 6 and the air inlet 31, a second three-way pipe 72 is provided between the coating liquid pipe 7 and the liquid inlet 32, the compressed air pipe 6 is also provided with a compressed air switch 63, and the coating liquid pipe 7 is also provided with a coating liquid switch 73.

[0019] The specific workflow is as follows:

[0020] The first support rod 42, the first support block 43, the second support rod 44, the second support block 45 and the third support rod 46 are connected in sequence to form a spray gun frame 4, the spray gun 2 is connected to the liquid outlet 33 of the pneumatic air induced check valve 3, the compressed air pipe 6 is connected to the first three-way pipe 61 through a hose, the first three-way pipe 61 is respectively connected to the air inlets 31 of the two pneumatic air induced check valves 3, the coating liquid pipe 7 is connected to the second three-way pipe 72 through a hose, the second three-way pipe 72 is respectively connected to the two pneumatic air induced check valves The liquid inlet 32 ​​of the valve 3 opens the manual valve 71, and the coating liquid switch 73 is controlled to open by the control box. The coating liquid enters the spray gun 2 through the pneumatic air induced check valve 3 to spray the pills in the coating pot 1. After the spraying is completed, the coating liquid switch 73 is closed to stop the spraying. At the same time, the compressed air pipe switch 63 is opened, and the compressed air enters the pneumatic air induced check valve 3 through the air inlet 31, pushing the plug 34 to block the liquid outlet 33 to prevent the residual liquid in the hose from remaining in the spray gun 2, causing the spray gun 2 to leak.

[0021] According to the above process, the problem in the prior art that when the spray gun of the coating machine stops spraying liquid and the spray gun is closed, there is coating liquid remaining in the spray gun, and the residual coating liquid drips into the coating pot, causing the meatballs in the coating pot to stick together, affecting product quality can be solved.

[0022] In summary, the coating machine spray gun anti-leakage device has a simple structure. By installing a pneumatic air induced check valve between the coating liquid pipeline and the spray gun, dripping and leakage of the coating liquid in the spray gun can be prevented, thereby better ensuring product quality.

[0023] It should be noted that the above is only a preferred embodiment of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments. Without departing from the spirit or basic features of the utility model, the utility model can be implemented in other specific forms. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A liquid leakage prevention device for a coating machine spray gun, characterized in that: The coating machine spray gun anti-leakage device comprises a coating pot (1), a spray gun (2), a pneumatic air induced check valve (3), a spray gun stand (4), a hot air pipe main pipe (5), a hot air pipe branch pipe (51), a compressed air pipe (6) and a coating liquid pipe (7). The pneumatic air induced check valve (3) is a T-shaped structure. The pneumatic air induced check valve (3) is provided with an air inlet (31), a liquid inlet (32) and a liquid outlet (33). The spray gun stand (4) comprises a bracket (41), a first support rod (42), a first support block (43), a second support rod (44), at least one second support block (45) and at least one third support rod (46). The coating pot (1) is connected to a support seat (11). The bracket (41) is vertically fixedly connected to the hot air pipe main pipe (5). The first support rod (42) is movably connected to the bracket (41). The support rod (42) is arranged in parallel with the hot air pipe main pipe (5); the first support rod (42) passes through the first support block (43); one end of the second support rod (44) passes through the first support block (43); the other end of the second support rod (44) passes through at least one second support block (45); the second support block (45) is arranged in the coating pot (1); the third support rod (46) passes through the second support block (45); the pneumatic air induction check valve (3) is installed on the third support rod (46); the air inlet (31) is connected to the compressed air pipe (6) through a hose; the liquid inlet (32) is connected to the coating liquid pipe (7) through a hose; the liquid outlet (33) is connected to the spray gun (2); the hot air pipe main pipe (5) is connected to the hot air pipe branch pipe (51) through a flange; one end of the hot air pipe branch pipe (51) extends into the coating pot (1).

2. The coating machine spray gun liquid leakage prevention device according to claim 1, characterized in that: The compressed air pipe (6) is provided with a pressure gauge (62) and a compressed air switch (63).

3. The coating machine spray gun liquid leakage prevention device according to claim 2, characterized in that: The coating liquid pipe (7) is provided with a manual valve (71) and a coating liquid switch (73).

4. The coating machine spray gun liquid leakage prevention device according to claim 3, characterized in that: A first three-way pipe (61) is provided between the compressed air pipe (6) and the air inlet (31).

5. The coating machine spray gun liquid leakage prevention device according to claim 4, characterized in that: A second three-way pipe (72) is provided between the coating liquid pipe (7) and the liquid inlet (32).

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