Guniting system of coating machine

Abstract

The utility model discloses a coating machine guniting system which comprises a conveying hose, a peristaltic pump, a pressure sensor, a spray gun, a gun cleaning mechanism and a control module, the spray gun is connected with the conveying hose, the peristaltic pump is arranged on the conveying hose, the pressure sensor is arranged on the conveying hose between the spray gun and the peristaltic pump, and the gun cleaning mechanism is connected with the spray gun and used for cleaning the spray gun. The peristaltic pump, the pressure sensor and the gun cleaning mechanism are all in signal connection with the control module. The guniting system of the coating machine has the advantages that detection is not prone to failure, the blockage condition can be judged in time, blockage can be cleaned in time, the blockage opening condition can be judged, and pipe explosion is avoided.

Description

Technical Field

[0001] This utility model relates to the field of food and pharmaceutical packaging machinery and equipment technology, specifically to a coating machine spraying system. Background Technology

[0002] In the high-efficiency coating machine, the slurry in the tank is delivered to the spray gun via a peristaltic pump. The spray gun then atomizes the slurry, spraying it onto the tablets in an atomized form. The slurry is delivered through a silicone hose, which has limited pressure resistance. If the slurry is not completely dissolved or lumps form during mixing, it may be drawn into the hose by the peristaltic pump. Simultaneously, the spray gun cannot atomize the particulate powder, leading to hose blockage. Prolonged hose blockage can cause the hose to burst. A burst hose prevents the slurry from being atomized by the spray gun, resulting in the slurry being poured directly onto the tablets. This prevents the tablets from drying properly, causing them to stick together. Consequently, all tablets in the coating machine's batch are unqualified, resulting in the entire batch being scrapped and causing significant losses for the pharmaceutical company.

[0003] Currently, the clogging of a coating machine is typically determined by detecting the pressure of the spray gun slurry. This pressure is monitored using a rigid pipe connected to a flexible hose, with a pressure sensor mounted on the rigid pipe. However, this method cannot directly detect pressure fluctuations in the flexible hose, and the detection is prone to failure. Furthermore, the rigid pipe usually requires fixed installation, making it difficult to clean, thus preventing the entire process from meeting GMP standards. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a coating machine spraying system that is not easy to fail, can timely judge the blockage, can clear the blockage in time, and can also judge the blockage clearance status to avoid pipe bursting.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A coating machine spraying system includes a delivery hose, a peristaltic pump, a pressure sensor, a spray gun, a cleaning mechanism, and a control module. The spray gun is connected to the delivery hose, the peristaltic pump is mounted on the delivery hose, the pressure sensor is mounted on the delivery hose between the spray gun and the peristaltic pump, and the cleaning mechanism is connected to the spray gun for cleaning the spray gun. The peristaltic pump, the pressure sensor, and the cleaning mechanism are all signal-connected to the control module.

[0007] As a further improvement to the above technical solution:

[0008] The peristaltic pump includes a pump body and a squeezing assembly disposed on the pump body. The delivery hose passes through the pump body. The squeezing assembly is located on one side of the delivery hose and is used to squeeze the delivery hose. The squeezing assembly is signal-connected to the control module.

[0009] The extrusion assembly includes a rotating shaft, multiple extrusion rollers, and a drive component for driving the rotating shaft. Each of the extrusion rollers is located on the periphery of the rotating shaft and is arranged at intervals around the center of the rotating shaft. The drive component is signal-connected to the control module.

[0010] The extrusion rollers are arranged at uniform intervals around the center of the rotating shaft.

[0011] The extrusion wheel and the rotating shaft are fixedly connected by a connecting rod.

[0012] The extension line of the connecting rod passes through the center of the pivot.

[0013] The extrusion rollers are provided in four units.

[0014] The spray gun is equipped with an air inlet, and the gun cleaning mechanism is connected to the air inlet.

[0015] The coating machine spraying system also includes a container filled with slurry, and the other end of the delivery hose relative to the spray gun is connected to the container.

[0016] A method for preventing clogging in the above-mentioned coating machine spraying system includes the following steps:

[0017] S1. Generating a pressure-time variation graph: The peristaltic pump starts, the pressure sensor detects the pressure value of the delivery hose and transmits the pressure value to the control module. The control module generates a pressure-time variation graph based on the relationship between the received pressure value and time.

[0018] S2. Determine the blockage status: When the pressure fluctuation trend line A in the pressure-time change graph is a straight line, it is determined that the spray gun is blocked, and the control module activates the cleaning mechanism to clean the spray gun.

[0019] S3. Determine the cleaning status: If the pressure fluctuation trend line A in the pressure-time change graph becomes a wavy line, it is determined that the spray gun blockage has been cleared; if the pressure fluctuation trend line A in the pressure-time change graph is still a straight line, it is determined that the spray gun blockage cannot be cleared, and the control module stops the peristaltic pump.

[0020] Compared with the prior art, the advantages of this utility model are:

[0021] This invention relates to a coating machine spraying system. The pressure sensor directly detects pressure fluctuations on the delivery hose, enabling more accurate monitoring of spray gun blockage and reducing the likelihood of detection failure. When the pressure in the delivery hose is abnormal (pressure fluctuation trend line A in the pressure-time graph is a straight line), a spray gun blockage is identified, and the cleaning mechanism is immediately activated to clean the spray gun, clearing the blockage and preventing prolonged blockage of the delivery hose, thus avoiding pipe bursting. Furthermore, the system can determine the blockage clearance status by observing changes in the pressure fluctuation trend line A in the pressure-time graph. If the blockage is not cleared (pressure fluctuation trend line A in the pressure-time graph remains a straight line), the peristaltic pump immediately stops operating to prevent it from continuing to work and placing a pressure burden on the delivery hose, further preventing pipe bursting. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the coating machine spraying system of this utility model.

[0023] Figure 2 This is a schematic diagram of the peristaltic pump in the coating machine spraying system of this utility model.

[0024] Figure 3 This is a schematic diagram of the spray gun structure of the coating machine spraying system of this utility model.

[0025] Figure 4 This is a pressure-time variation diagram of the conveying hose of the shaping mechanism in the spraying system of the coating machine of this utility model.

[0026] The labels in the diagram represent:

[0027] 1. Delivery hose; 2. Peristaltic pump; 21. Pump body; 22. Extrusion assembly; 221. Shaft; 222. Extrusion wheel; 223. Connecting rod; 3. Pressure sensor; 4. Spray gun; 41. Air inlet; 5. Cleaning mechanism; 6. Control module; 7. Container. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Example 1:

[0033] Figures 1 to 3 This invention illustrates an embodiment of the coating machine spraying system. The coating machine spraying system of this embodiment includes a conveying hose 1, a peristaltic pump 2, a pressure sensor 3, a spray gun 4, a cleaning mechanism 5, and a control module 6. The spray gun 4 is connected to the conveying hose 1, the peristaltic pump 2 is mounted on the conveying hose 1, the pressure sensor 3 is mounted on the conveying hose 1 between the spray gun 4 and the peristaltic pump 2, and the cleaning mechanism 5 is connected to the spray gun 4 for cleaning the spray gun 4. The peristaltic pump 2, the pressure sensor 3, and the cleaning mechanism 5 are all signal-connected to the control module 6.

[0034] The operation process of this coating machine's shotcrete system is as follows: Peristaltic pump 2 starts, pressure sensor 3 detects the pressure value of delivery hose 1 and transmits the pressure value to control module 6. Control module 6 generates a pressure-time change graph based on the received pressure value and the relationship between time (e.g., ...). Figure 4 (As shown); When the pressure fluctuation trend line A in the pressure-time change graph is a straight line, it is determined that the spray gun 4 is clogged, and the control module 6 activates the cleaning mechanism 5 to clean the spray gun 4; if the pressure fluctuation trend line A in the pressure-time change graph becomes a wavy line (as shown), it indicates that the spray gun 4 is clogged. Figure 4 As shown by the pressure fluctuation trend line A in the lower part of the pressure-time graph, it can be determined that the blockage in spray gun 4 has been cleared; if the pressure fluctuation trend line A in the pressure-time change graph is still a straight line (as shown in the lower part of the pressure-time change graph), it can be determined that the blockage in spray gun 4 has been cleared; Figure 4 When the pressure fluctuation trend line A is located above, it is determined that the spray gun 4 is blocked and cannot be cleared, and the control module 6 stops the peristaltic pump 2 from working.

[0035] Pressure sensor 3 directly detects pressure fluctuations on the delivery hose 1, enabling more accurate monitoring of the spray gun 4's blockage status and reducing the likelihood of detection failure. When the pressure in the delivery hose 1 is abnormal (pressure fluctuation trend line A in the pressure-time graph is a straight line), it indicates that the spray gun 4 is blocked. The cleaning mechanism 5 is then activated to clean the spray gun 4, clearing the blockage and preventing prolonged blockage of the delivery hose 1, thus avoiding hose rupture. Furthermore, the change in pressure fluctuation trend line A in the pressure-time graph indicates whether the blockage has been cleared. If the blockage remains unresolved (pressure fluctuation trend line A in the pressure-time graph is still a straight line), the peristaltic pump 2 immediately stops operating, preventing it from continuing to put pressure on the delivery hose 1 and further preventing hose rupture.

[0036] Furthermore, in this embodiment, the peristaltic pump 2 includes a pump body 21 and a tube-squeezing assembly 22 disposed on the pump body 21. The delivery hose 1 passes through the pump body 21, and the tube-squeezing assembly 22 is located on one side of the delivery hose 1 and is used to squeeze the delivery hose 1. The tube-squeezing assembly 22 is connected to the control module 6 via a signal. The tube-squeezing assembly 22 continuously squeezes and releases the delivery hose 1 to achieve the pumping action of the slurry.

[0037] Furthermore, in this embodiment, the extrusion assembly 22 includes a rotating shaft 221, multiple extrusion rollers 222, and a drive unit for driving the rotating shaft 221. Each extrusion roller 222 is located around the periphery of the rotating shaft 221 and is arranged at intervals around the center of the rotating shaft 221. The drive unit is signal-connected to the control module 6. The working principle of the peristaltic pump 2 is as follows: the drive unit drives the rotating shaft 221 to rotate, and the rotating shaft 221 drives each extrusion roller 222 to revolve around the rotating shaft 221. During the revolve, each extrusion roller 222 sequentially extrudes and releases the delivery hose 1, thereby realizing the pumping effect of the slurry.

[0038] Furthermore, in this embodiment, each extrusion roller 222 is arranged at uniform intervals around the center of the rotating shaft 221. This improves the uniformity of slurry pumping.

[0039] Furthermore, in this embodiment, the extrusion roller 222 and the rotating shaft 221 are fixedly connected by a connecting rod 223. The connecting rod 223 increases the effective stroke of the extrusion roller 222 in extruding the delivery hose 1 by lengthening the distance between the extrusion roller 222 and the rotating shaft 221.

[0040] Furthermore, in this embodiment, the extension line of the connecting rod 223 passes through the center of the rotating shaft 221.

[0041] Furthermore, in this embodiment, there are four extrusion rollers 222. Of course, in other embodiments, there may be three or more extrusion rollers 222.

[0042] Furthermore, in this embodiment, the spray gun 4 is provided with an air inlet 41, and the cleaning mechanism 5 is connected to the air inlet 41. The cleaning mechanism 5 supplies air to the spray gun 4 through the air inlet 41 to perform air cleaning of the spray gun 4. By cleaning the spray gun 4 with air, the quality of the slurry inside the spray gun 4 is prevented from being affected.

[0043] Furthermore, in this embodiment, the coating machine spraying system also includes a container 7 containing slurry, and the other end of the delivery hose 1 relative to the spray gun 4 is connected to the container 7.

[0044] Example 2:

[0045] The anti-clogging method for the coating machine shotcrete system in Example 1 includes the following steps:

[0046] S1. Forming a pressure-time variation graph: Peristaltic pump 2 starts, pressure sensor 3 detects the pressure value of delivery hose 1 and transmits the pressure value to control module 6. Control module 6 forms a pressure-time variation graph based on the relationship between the received pressure value and time.

[0047] S2. Determine the blockage status: When the pressure fluctuation trend line A in the pressure-time change graph is a straight line, it is determined that the spray gun 4 is blocked, and the control module 6 activates the cleaning mechanism 5 to clean the spray gun 4.

[0048] S3. Determine the cleaning status: If the pressure fluctuation trend line A in the pressure-time change graph becomes a wavy line, it is determined that the blockage of spray gun 4 has been cleared; if the pressure fluctuation trend line A in the pressure-time change graph is still a straight line, it is determined that the blockage of spray gun 4 cannot be cleared, and the control module 6 stops the peristaltic pump 2 from working.

[0049] The anti-clogging method of the spraying system in this coating machine utilizes pressure sensor 3 to directly detect pressure fluctuations on the delivery hose 1, enabling more accurate monitoring of the clogging status of the spray gun 4 and reducing the likelihood of detection failure. When the pressure in the delivery hose 1 is abnormal (when the pressure fluctuation trend line A in the pressure-time graph is a straight line), it is determined that the spray gun 4 is clogged. The cleaning mechanism 5 is then activated to clean the spray gun 4, clearing the blockage and preventing prolonged clogging of the delivery hose 1, thus avoiding pipe bursting. Furthermore, the change in pressure fluctuation trend line A in the pressure-time graph indicates whether the blockage has been cleared. If the blockage remains unresolved (pressure fluctuation trend line A in the pressure-time graph is still a straight line), the peristaltic pump 2 immediately stops working to prevent it from continuing to operate and placing a pressure burden on the delivery hose 1, further preventing pipe bursting.

[0050] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A coating machine spraying system, comprising a conveying hose (1), a peristaltic pump (2), a pressure sensor (3), a spray gun (4), a gun cleaning mechanism (5) and a control module (6), characterized in that: The spray gun (4) is connected to the delivery hose (1), the peristaltic pump (2) is arranged on the delivery hose (1), the pressure sensor (3) is arranged on the delivery hose (1) between the spray gun (4) and the peristaltic pump (2), the gun cleaning mechanism (5) is connected to the spray gun (4) and is used to clean the spray gun (4), and the peristaltic pump (2), the pressure sensor (3) and the gun cleaning mechanism (5) are all connected to the control module (6) by signal.

2. The coating machine spraying system according to claim 1, characterized in that: The peristaltic pump (2) comprises a pump body (21) and a tube squeezing assembly (22) arranged on the pump body (21); the delivery hose (1) is inserted into the pump body (21); the tube squeezing assembly (22) is located on one side of the delivery hose (1) and is used to squeeze the delivery hose (1); the tube squeezing assembly (22) is connected to a control module (6) by signal.

3. The coating machine spraying system according to claim 2, characterized in that: The tube extrusion assembly (22) comprises a rotating shaft (221), a plurality of extrusion wheels (222) and a driving member for driving the rotating shaft (221); each of the extrusion wheels (222) is arranged on the circumference of the rotating shaft (221) and is spaced apart around the center of the rotating shaft (221); and the driving member is connected to a control module (6) by signal.

4. The coating machine spraying system according to claim 3, characterized in that: The extrusion wheels (222) are arranged at even intervals around the center of the rotating shaft (221).

5. The coating machine spraying system according to claim 3, characterized in that: The extrusion wheel (222) is fixedly connected to the rotating shaft (221) via a connecting rod (223).

6. The coating machine spraying system according to claim 5, characterized in that: The extension line of the connecting rod (223) passes through the center of the rotating shaft (221).

7. The coating machine spraying system according to claim 3, characterized in that: The extrusion wheels (222) are provided in four numbers.

8. The coating machine spraying system according to any one of claims 1 to 7, characterized in that: The spray gun (4) is provided with an air inlet (41), and the gun cleaning mechanism (5) is connected to the air inlet (41).

9. The coating machine spraying system according to any one of claims 1 to 7, characterized in that: The coating machine spraying system further comprises a container (7) filled with slurry, and the other end of the delivery hose (1) opposite to the spray gun (4) is connected to the container (7).

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