A spray gun nozzle cleaning device

Abstract

This application relates to the field of automated spraying technology, and in particular to a spray gun nozzle cleaning device, including a fixing mechanism, a cleaning mechanism, a receiving socket, and a sealing mechanism. The fixing mechanism has a drain port at its bottom and a pressure relief port at its top, for connection to a support platform used in conjunction with the spray gun nozzle cleaning device. The cleaning mechanism is mounted vertically on top of the fixing mechanism and is connected to it. The receiving socket is mounted on top of the cleaning mechanism and has an insertion hole for inserting a spray gun nozzle. When the nozzle is inserted into the insertion hole, the receiving socket and the cleaning mechanism can move vertically to prevent damage to the nozzle. After the nozzle is inserted into the insertion hole, the cleaning mechanism sprays a cleaning medium onto the nozzle to remove paint accumulated on it. The sealing mechanism is mounted on the receiving socket and forms a contact seal and an air seal between the nozzle and the inner wall of the insertion hole, achieving a multiple sealing effect and effectively preventing the overflow of the cleaning medium.

Description

Technical Field

[0001] This application relates to the field of automated spraying technology, and in particular to a spray gun nozzle cleaning device. Background Technology

[0002] In automated spray painting production lines, spraying robots typically use automatic spray guns for spraying operations. Over time, paint gradually accumulates on the outside of the nozzles. If not cleaned promptly, this accumulated paint will drip or splatter during subsequent spraying operations, contaminating the product surface and leading to a significant increase in the defect rate. Therefore, regular cleaning of the spray gun nozzles is necessary.

[0003] Traditional cleaning methods involve manual wiping at regular intervals. This requires stopping the machine during wiping, disrupting the continuous production process and reducing efficiency. Furthermore, manual operation suffers from inconsistent cleaning standards and the potential introduction of impurities. Therefore, online cleaning devices are increasingly being used to periodically clean the nozzles of the spray guns.

[0004] The existing technical solutions mentioned above have the following drawbacks: when the nozzle of the spray gun is cleaned regularly using an online cleaning device, the cleaning agent is prone to overflow from the joint between the nozzle and the online cleaning device, causing secondary contamination to the spray gun or the spraying robot. Summary of the Invention

[0005] To prevent cleaning agent spillage, this application provides a spray gun nozzle cleaning device.

[0006] This application provides a spray gun nozzle cleaning device, which adopts the following technical solution: A paint spray gun nozzle cleaning device, comprising: The fixed mechanism has a drain port at the bottom and a pressure relief port at the top, which is used to connect with the support platform used in conjunction with the paint gun nozzle cleaning device. The cleaning mechanism can be installed vertically on top of the fixed mechanism and is connected to the fixed mechanism. The receiving socket is installed at the top of the cleaning mechanism and has a receiving hole for the nozzle of the paint gun to be inserted; the cleaning mechanism sprays the cleaning medium into the nozzle; A sealing mechanism, installed on the receiving socket, forms a contact seal and an air seal between the nozzle and the inner wall of the receiving hole.

[0007] By adopting the above technical solution, the fixing mechanism supports the cleaning mechanism and the receiving socket, facilitating the overall installation of the paint gun nozzle cleaning device on the support platform. The drain port is used to discharge the cleaning medium containing waste paint. The pressure relief port is used for pressure relief. When the nozzle is inserted into the receiving hole, the receiving socket and the cleaning mechanism can float up and down to prevent damage to the nozzle. After the nozzle is inserted into the receiving hole, the cleaning mechanism sprays the cleaning medium onto the nozzle to remove paint accumulated on it. A sealing mechanism provides contact and airtight sealing between the nozzle and the receiving hole, achieving multiple sealing effects and effectively preventing the spillage of the cleaning medium, thereby preventing secondary contamination of the spray gun or painting robot.

[0008] This application further provides that: a flow guiding cavity is formed circumferentially inside the socket; The sealing mechanism includes: A sealing ring is installed in the middle of the inner wall of the insertion hole; The lower air ring has multiple lower air outlets evenly formed along the circumference and is installed on the lower part of the inner wall of the insertion hole; each lower air outlet is connected to the guide cavity. The upper air ring has multiple upper air outlets evenly formed along the circumference and is installed on the upper part of the inner wall of the insertion hole; each upper air outlet is connected to the guide cavity. The air duct is fixedly connected at one end to the outer wall of the socket and communicates with the air duct cavity.

[0009] By adopting the above technical solution, compressed air enters the guide chamber through the air guide pipe, and then flows out through each lower air outlet of the lower air ring and each upper air outlet of the upper air ring. Multiple lower air outlets form a lower air curtain in the circumferential direction of the nozzle, and this lower air curtain is located below the sealing ring. Multiple upper air outlets form an upper air curtain in the circumferential direction of the nozzle, and this upper air curtain is located above the sealing ring. The lower air curtain, sealing ring, and upper air curtain work together to provide multiple sealing effects in the axial direction of the nozzle, effectively preventing the overflow of the cleaning medium.

[0010] This application further specifies that the sealing mechanism also includes: Multiple clamping springs are evenly embedded in the sealing ring along its circumference; the axial direction of each clamping spring is the same as the radial direction of the sealing ring.

[0011] By adopting the above technical solution, multiple clamping springs effectively improve the fit between the sealing ring and the outer wall of the nozzle at various positions in the circumferential direction, further enhancing the sealing effect. Simultaneously, the multiple clamping springs allow the inner wall of the sealing ring to adaptively adjust according to the outer circumferential size and shape of the nozzle, ensuring both sealing performance and improving the versatility of the sealing mechanism.

[0012] This application further specifies that the sealing mechanism also includes: The first one-way valve is fixedly connected at one end to the end of the air duct away from the socket, and is in communication with it; The first pneumatic control valve has one end connected to the other end of the first check valve, and the other end is used to connect to the first compressed air supply source used in conjunction with the paint gun nozzle cleaning device.

[0013] By adopting the above technical solution, the first check valve is used to restrict the unidirectional flow of compressed air. The first pneumatic control valve is used to control the on / off state of the compressed air input pipeline.

[0014] This application further specifies that the cleaning mechanism includes: The support plate can be installed vertically and floatingly on top of the fixing mechanism; The drainage tube is set vertically, with its top end fixedly connected to the bottom end of the support plate, and its bottom end inserted into the fixing mechanism through the pressure relief port; The cleaning cylinder is vertically installed, with its bottom end fixedly connected to the top end of the support plate; the cross-sectional dimension of the bottom end of the cleaning cylinder is smaller than that of the top end. The top cover is detachably installed on the top of the cleaning drum, and the top is detachably connected to the receiving socket; The guide tube, installed on the support plate, has one end inside the cleaning cylinder and the other end outside the cleaning cylinder, and is used to input the cleaning medium; The adapter is vertically installed and fixedly connected to one end of the guide tube located inside the cleaning cylinder, and they are in communication. A rotating head is rotatably mounted on the top of the adapter and is connected to the adapter; There are multiple rotating rods, all of which are inclined and evenly distributed along the circumference of the rotating head. Their bottom ends are fixedly connected to the rotating head and are open to each other, while their top ends are all closed structures. At least one first nozzle is fixed on the side wall of each rotating rod. The second nozzle is fixed to the rotating head.

[0015] By adopting the above technical solution, the guide tube guides the cleaning medium containing waste paint, allowing it to flow smoothly into the fixed mechanism. The cleaning tube provides the cleaning area. The top cover seals the top of the cleaning tube. The cleaning medium flows in from the guide tube, passes sequentially through the adapter, rotating head, and multiple rotating rods, and is then sprayed from multiple first and second nozzles towards the nozzles of the spray gun to remove waste paint from the nozzles. When the cleaning medium is sprayed from the multiple first and second nozzles, it drives the multiple rotating rods and rotating head to rotate, effectively improving the cleaning effect.

[0016] This application further specifies that the cleaning mechanism also includes: The second one-way valve is fixedly connected at one end to the end of the guide pipe located outside the cleaning cylinder, and is in communication with it; The third one-way valve is fixedly connected to the end of the guide pipe located outside the cleaning cylinder, and they are in communication.

[0017] By adopting the above technical solution, the second check valve is used to restrict the unidirectional flow of cleaning agent. The third check valve is used to restrict the unidirectional flow of water or compressed air.

[0018] This application further includes: The switching valve is connected at one end to the other end of the second check valve; The needle valve has one end connected to the other end of the switch valve, and the other end is used to connect to the cleaning agent supply source used in conjunction with the paint gun nozzle cleaning device. The second pneumatic control valve is connected at one end to the other end of the third check valve, and at the other end to the second compressed air supply source used in conjunction with the paint gun nozzle cleaning device.

[0019] By employing the above technical solution, the on / off valve is used to control the opening and closing of the cleaning agent input pipeline. The needle valve is used to regulate the input flow rate of the cleaning agent. The second pneumatic control valve is used to control the opening and closing of the compressed air input pipeline.

[0020] The application further comprises: a connecting ring is formed at the middle of the top of the top of the top cover; the outer wall of the connecting ring is threadedly connected to the inner wall of the bottom of the socket; A flange is formed at the bottom of the socket; the flange is connected to the top cover by bolts.

[0021] By adopting the above technical solution, the top cover and the socket can be easily assembled, used, disassembled, and replaced. The connecting ring and the flange cooperate with each other, achieving a dual connection effect between the top cover and the socket, ensuring the stability of the connection between the top cover and the socket.

[0022] This application further includes: The lower washer is placed between the bottom of the top cover and the top of the cleaning cylinder; The upper gasket is placed between the bottom of the flange and the top of the cover.

[0023] By adopting the above technical solution, the lower gasket improves the sealing performance at the connection between the top cover and the cleaning cylinder. The upper gasket improves the sealing performance at the connection between the flange and the top cover.

[0024] This application further provides that: guide holes are formed at the four corners of the support plate; Fixed mechanisms include: Fixing plate; The sewage discharge pipe is vertically installed, with a sewage discharge port at the bottom and a pressure relief port at the top. The top of the pipe is detachably connected to the bottom of the fixed plate. There are four guide pins, all of which are set vertically. Their bottom ends are fixedly connected to the four corners of the fixed plate, and their top ends pass through the guide holes at the four corners. There are four buffer springs, which are fitted onto the four guide pins one by one, and their top ends abut against the bottom end of the support plate.

[0025] By adopting the above technical solution, a fixing plate is used to connect with the support platform to install the entire paint gun nozzle cleaning device on the support platform. A drain pipe is used to guide the cleaning medium mixed with waste paint outwards. Four guide pins guide the vertical movement of the support plate. When the nozzle is inserted into the receiving hole, four buffer springs are gradually compressed, providing a buffering effect, allowing the receiving hole and cleaning mechanism to float vertically, preventing damage to the nozzle.

[0026] In summary, the beneficial technical effects of this application are as follows: 1. The fixing mechanism supports the cleaning mechanism and the receiving socket, facilitating the overall mounting of the paint gun nozzle cleaning device on the support platform. The drain port discharges the cleaning medium containing waste paint. The pressure relief port is used for pressure relief. When the nozzle is inserted into the receiving hole, the receiving socket and cleaning mechanism can float up and down to prevent nozzle damage. After the nozzle is inserted into the receiving hole, the cleaning mechanism sprays the cleaning medium onto the nozzle to remove paint accumulated on it. A sealing mechanism provides contact and airtight sealing between the nozzle and the receiving hole, achieving multiple sealing effects and effectively preventing the spillage of the cleaning medium, thus avoiding secondary contamination of the spray gun or painting robot.

[0027] 2. Compressed air enters the guide chamber through the air guide pipe, and then flows out through each lower air outlet of the lower air ring and each upper air outlet of the upper air ring. Multiple lower air outlets form a lower air curtain circumferentially around the nozzle, located below the sealing ring. Multiple upper air outlets form an upper air curtain circumferentially around the nozzle, located above the sealing ring. The lower air curtain, sealing ring, and upper air curtain work together to provide multiple seals axially around the nozzle, effectively preventing the overflow of the cleaning medium. Multiple clamping springs effectively improve the fit between the sealing ring and the outer wall of the nozzle at various positions circumferentially, further enhancing the sealing effect. Simultaneously, the multiple clamping springs allow the inner wall of the sealing ring to adaptively adjust according to the outer circumferential dimensions and shape of the nozzle, ensuring both sealing effectiveness and improving the versatility of the sealing mechanism. The first one-way valve restricts the unidirectional flow of compressed air. The first pneumatic control valve controls the opening and closing of the compressed air input pipeline.

[0028] 3. The guide tube directs the cleaning medium containing waste paint, allowing it to flow smoothly into the fixed mechanism. The cleaning tube provides the cleaning area. The top cover seals the top of the cleaning tube. The cleaning medium flows in from the guide tube, passes sequentially through the adapter, rotating head, and multiple rotating rods, and is then sprayed from multiple first and second nozzles towards the nozzles of the spray gun to remove waste paint from the nozzles. As the cleaning medium is sprayed from the multiple first and second nozzles, it drives the multiple rotating rods and rotating head to rotate, effectively improving the cleaning effect. A second one-way valve restricts the unidirectional flow of the cleaning agent. A third one-way valve restricts the unidirectional flow of water or compressed air. When cleaning the nozzles of the spray gun, cleaning agent and compressed air / water are alternately introduced into the guide tube. Compared to using only cleaning agent, compressed air, or water, this significantly improves the cleaning effect and efficiency. After cleaning, compressed air / water is used to remove the cleaning agent adhering to the nozzles, avoiding secondary contamination.

[0029] 4. The fixing plate is used to connect to the support platform to mount the entire paint gun nozzle cleaning device on the support platform. The drain pipe is used to guide the cleaning medium mixed with waste paint out. Four guide pins guide the up and down movement of the support plate. When the nozzle is inserted into the receiving hole, four buffer springs are gradually compressed, providing a buffering effect, allowing the receiving hole and cleaning mechanism to float up and down, preventing damage to the nozzle. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of an embodiment of a paint gun nozzle cleaning device; Figure 2 yes Figure 1 A cross-sectional view of the paint gun nozzle cleaning device shown along the axial direction; Figure 3 yes Figure 2 A magnified view of a portion of region A in the middle; Figure 4 yes Figure 1 The diagram shows the combined structure of the socket and sealing mechanism in the spray gun nozzle cleaning device. Figure 5 This is a schematic diagram illustrating the sealing principle when the nozzle is subjected to contact sealing and air sealing. Figure 6 This is a schematic diagram of the combined structure of the sealing ring and the clamping spring of the sealing mechanism; Figure 7 yes Figure 1 A schematic diagram of the cleaning mechanism in the paint gun nozzle cleaning device shown; Figure 8 yes Figure 7 A schematic diagram of the cleaning mechanism from another perspective; Figure 9This is a cross-sectional view of another embodiment of the cleaning mechanism; Figure 10 yes Figure 1 The diagram shows the structure of the fixing mechanism in the paint gun nozzle cleaning device.

[0031] Reference numerals: 110, Fixing mechanism; 111, Fixing plate; 112, Sewage discharge cylinder; 1121, Sewage discharge port; 1122, Pressure relief port; 113, Guide pin; 114, Buffer spring; 120, Cleaning mechanism; 121, Support plate; 1211, Guide hole; 122, Drainage cylinder; 123, Cleaning cylinder; 124, Top cover; 1241, Connecting ring; 125, Drainage pipe; 126, Adapter; 127, Rotating head; 128, Rotating rod; 1291, First nozzle; 1292, Second nozzle; 1293, Second... 1294. Check valve; 1295. Third check valve; 1296. Support ring; 1297. Steering gear; 1298. Clutch; 1299. Transmission gear; 130. Socket; 131. Insertion hole; 132. Flow guide chamber; 133. Flange; 140. Sealing mechanism; 141. Sealing ring; 142. Lower air ring; 143. Upper air ring; 144. Air guide pipe; 145. Tightening spring; 146. First check valve; 150. Lower washer; 160. Upper washer; 210. Lower air curtain; 220. Upper air curtain; 300. Nozzle. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0033] Reference Figure 1 and Figure 2This application discloses a paint gun nozzle cleaning device, including a fixing mechanism 110, a cleaning mechanism 120, a receiving socket 130, and a sealing mechanism 140. The fixing mechanism 110 has a drain port 1121 at its bottom and a pressure relief port 1122 at its top, for connecting to a support platform used with the paint gun nozzle cleaning device. The fixing mechanism 110 supports the cleaning mechanism 120 and the receiving socket 130, facilitating the overall mounting of the paint gun nozzle cleaning device on the support platform. The drain port 1121 discharges the cleaning medium containing waste paint. The pressure relief port 1122 is used for pressure relief. The cleaning mechanism 120 is vertically movably mounted on the top of the fixing mechanism 110 and communicates with it. The receiving socket 130 is mounted on the top of the cleaning mechanism 120 and has an insertion hole 131 for inserting a paint gun nozzle 300. When the nozzle 300 is inserted into the receiving hole 131, the receiving hole 130 and the cleaning mechanism 120 can float up and down to prevent damage to the nozzle 300. After the nozzle 300 is inserted into the receiving hole 131, the cleaning mechanism 120 sprays cleaning medium onto the nozzle 300 to remove paint accumulated on the nozzle 300. The sealing mechanism 140 is installed on the receiving hole 130, forming a contact seal and an air seal between the nozzle 300 and the inner wall of the receiving hole 131. By using the sealing mechanism 140 to achieve a contact seal and an air seal between the nozzle 300 and the receiving hole 131, a multiple sealing effect is achieved, effectively preventing the spillage of the cleaning medium and thus preventing secondary contamination of the spray gun or painting robot.

[0034] Reference Figure 2 , Figure 3 and Figure 4 In one embodiment, a flow guide cavity 132 is formed circumferentially inside the receiving socket 130. The sealing mechanism 140 includes a sealing ring 141, a lower air ring 142, an upper air ring 143, a vent pipe 144, a first one-way valve 146, and a first pneumatic control valve. The sealing ring 141 is installed in the middle of the inner wall of the receiving hole 131 to provide a contact seal. The lower air ring 142 has a plurality of lower air outlets uniformly formed circumferentially and is installed in the lower part of the inner wall of the receiving hole 131. Each lower air outlet communicates with the flow guide cavity 132. The upper air ring 143 has a plurality of upper air outlets uniformly formed circumferentially and is installed in the upper part of the inner wall of the receiving hole 131. Each upper air outlet communicates with the flow guide cavity 132. One end of the vent pipe 144 is fixedly connected to the outer wall of the receiving socket 130 and communicates with the flow guide cavity 132. Compressed air enters the guide chamber 132 through the air guide pipe 144, and then flows out through each lower air outlet of the lower air ring 142 and each upper air outlet of the upper air ring 143. The sealing principle for contact sealing and airtight sealing of the nozzle 300 is as follows: Figure 5As shown, a lower air curtain 210 is formed circumferentially around the nozzle 300 using multiple lower air outlets, and the lower air curtain 210 is located below the sealing ring 141. An upper air curtain 220 is formed circumferentially around the nozzle 300 using multiple upper air outlets, and the upper air curtain 220 is located above the sealing ring 141. The lower air curtain 210, the sealing ring 141, and the upper air curtain 220 work together to provide multiple sealing effects in the axial direction of the nozzle 300, effectively preventing the overflow of the cleaning medium. It should be noted that each lower air outlet is inclined upwards at an angle of 0-30° with the horizontal line. Each upper air outlet is inclined downwards at an angle of 0-30° with the horizontal line. This effectively improves the air sealing effect. One end of the first one-way valve 146 is fixedly connected to and communicates with the end of the air guide pipe 144 away from the receiving socket 130, and is used to restrict the unidirectional flow of compressed air. One end of the first pneumatic control valve is connected to the other end of the first one-way valve 146, and the other end is used to connect to the first compressed air supply source used in conjunction with the paint gun nozzle cleaning device, for controlling the on / off of the compressed air input pipeline.

[0035] Reference Figure 6 In one embodiment, the sealing mechanism 140 includes a plurality of clamping springs 145. The clamping springs 145 are uniformly embedded within the sealing ring 141 along its circumference. The axial direction of each clamping spring 145 is the same as the radial direction of the sealing ring 141. The plurality of clamping springs 145 effectively improves the fit between the sealing ring 141 and the outer wall of the nozzle 300 at various positions along its circumference, further enhancing the sealing effect. Simultaneously, the plurality of clamping springs 145 allows the inner wall of the sealing ring 141 to adaptively adjust according to the outer circumferential dimensions and shape of the nozzle 300, ensuring both sealing effectiveness and improving the versatility of the sealing mechanism 140.

[0036] Reference Figure 2 , Figure 7 and Figure 8In one embodiment, the cleaning mechanism 120 includes a support plate 121, a diversion cylinder 122, a cleaning cylinder 123, a top cover 124, a guide pipe 125, an adapter 126, a rotating head 127, multiple rotating rods 128, and multiple first nozzles 1291 and second nozzles 1292. The support plate 121 is vertically mounted on the top of the fixing mechanism 110, allowing the entire cleaning mechanism 120 to float vertically. The diversion cylinder 122 is vertically arranged, with its top end fixedly connected to the bottom end of the support plate 121. Its bottom end is inserted into the fixing mechanism 110 through a pressure relief port 1122, guiding the cleaning medium containing waste paint, allowing the cleaning medium to flow smoothly into the fixing mechanism 110. The cleaning cylinder 123 is vertically arranged, with its bottom end fixedly connected to the top end of the support plate 121. The cleaning cylinder 123 provides a cleaning area. The cross-sectional dimension of the bottom end of the cleaning cylinder 123 is smaller than that of the top end, facilitating the convergence of the downward-flowing cleaning medium. The top cover 124 is detachably mounted on the top of the cleaning cylinder 123, and the top is detachably connected to the receiving socket 130. This facilitates the assembly, use, disassembly, and maintenance of the top cover 124 with the cleaning cylinder 123 and the receiving socket 130. The top cover 124 seals the top of the cleaning cylinder 123. The guide pipe 125 is mounted on the support plate 121, with one end inside the cleaning cylinder 123 and the other end outside the cleaning cylinder 123, for inputting the cleaning medium. It should be noted that the cleaning medium can be a cleaning agent, water, or compressed air. The adapter 126 is vertically arranged and fixedly connected to the end of the guide pipe 125 inside the cleaning cylinder 123, and is in communication with it. The rotating head 127 is rotatably mounted on the top of the adapter 126 via a bearing and is in communication with the adapter 126. Multiple rotating rods 128 are inclined and evenly distributed along the circumference of the rotating head 127, with their bottom ends fixedly connected to the rotating head 127 and in communication, and their top ends are all closed structures. At least one first nozzle 1291 is fixed to the side wall of each rotating rod 128. A second nozzle 1292 is fixed to the rotating head 127. The cleaning medium flows in from the guide pipe 125, passes sequentially through the adapter 126, the rotating head 127, and the multiple rotating rods 128, and is then sprayed from the multiple first nozzles 1291 and second nozzles 1292 toward the nozzle 300 of the spray gun to remove waste paint from the nozzle 300. When the cleaning medium is sprayed from the multiple first nozzles 1291 and second nozzles 1292, it drives the multiple rotating rods 128 and the rotating head 127 to rotate, effectively improving the cleaning effect.

[0037] Preferably, the top cover 124 and the cleaning cylinder 123 are detachably connected by means of snap-fit, threaded connection or bolt connection.

[0038] Reference Figure 7 and Figure 8In one embodiment, the cleaning mechanism 120 further includes a second one-way valve 1293 and a third one-way valve 1294. One end of the second one-way valve 1293 is fixedly connected to and communicates with the end of the guide pipe 125 located outside the cleaning cylinder 123. Cleaning agent flows into the guide pipe 125 from the second one-way valve 1293. The second one-way valve 1293 restricts the unidirectional flow of the cleaning agent. One end of the third one-way valve 1294 is fixedly connected to and communicates with the end of the guide pipe 125 located outside the cleaning cylinder 123. Water or compressed air flows into the guide pipe 125 from the third one-way valve 1294. The third one-way valve 1294 restricts the unidirectional flow of water or compressed air. It should be noted that when cleaning the nozzle 300 of the spray gun, cleaning agent and compressed air / water are alternately introduced into the guide pipe 125. Compared to using only cleaning agent, compressed air, or water, the cleaning effect and efficiency are significantly improved. After cleaning, use compressed air / water to remove the cleaning agent adhering to the nozzle 300 to avoid secondary pollution.

[0039] Reference Figure 9 In another embodiment, meshing teeth are formed on the outer wall of the rotating head 127. The cleaning mechanism 120 also includes a support ring 1295, a servo motor 1296, a clutch 1297, and a transmission gear 1298. The outer wall of the support ring 1295 is fixedly connected to the adapter 126. The servo motor 1296 is mounted on the support ring 1295 with its output shaft facing upward. The transmission gear 1298 is sleeved on the output shaft of the servo motor 1296 via the clutch 1297, and its outer wall is meshed with the outer wall of the rotating head 127. When the clutch 1297 disconnects the transmission gear 1298 from the output shaft of the servo motor 1296, the cleaning medium sprayed from the multiple first nozzles 1291 and the second nozzles 1292 drives the multiple rotating rods 128 and the rotating head 127 to rotate, realizing a passive rotation cleaning mode. When the clutch 1297 connects the transmission gear 1298 to the output shaft of the servo motor 1296, the servo motor 1296 drives the transmission gear 1298 to rotate, thereby causing the rotating head 127 and multiple rotating rods 128 to rotate, achieving an active rotation cleaning mode. In this way, the cleaning mode can be flexibly selected according to actual cleaning needs, achieving both active and passive rotation cleaning.

[0040] In one embodiment, the paint gun nozzle cleaning device further includes a switching valve, a needle valve, and a second pneumatic control valve. One end of the switching valve is connected to the other end of the second one-way valve 1293, and is used to control the on / off state of the cleaning agent input line. One end of the needle valve is connected to the other end of the switching valve, and the other end is connected to the cleaning agent supply source used with the paint gun nozzle cleaning device, and is used to regulate the input flow rate of the cleaning agent. One end of the second pneumatic control valve is connected to the other end of the third one-way valve 1294, and the other end is connected to the second compressed air supply source used with the paint gun nozzle cleaning device, and is used to control the on / off state of the compressed air input line.

[0041] Reference Figure 3 , Figure 4 and Figure 7 In one embodiment, a connecting ring 1241 is formed at the center of the top of the top of the top cover 124. The outer wall of the connecting ring 1241 is threadedly connected to the inner wall of the bottom end of the receiving socket 130. A flange 133 is formed at the bottom end of the receiving socket 130, and the flange 133 is bolted to the top cover 124. This facilitates the assembly, use, disassembly, and replacement of the top cover 124 and the receiving socket 130. The cooperation between the connecting ring 1241 and the flange 133 provides a double connection between the top cover 124 and the receiving socket 130, ensuring the stability of the connection between the top cover 124 and the receiving socket 130.

[0042] Reference Figure 3 In one embodiment, the paint gun nozzle cleaning device further includes a lower washer 150 and an upper washer 160. The lower washer 150 is disposed between the bottom end of the top cover 124 and the top end of the cleaning cylinder 123, improving the sealing performance at the connection between the top cover 124 and the cleaning cylinder 123. The upper washer 160 is disposed between the bottom end of the flange 133 and the top end of the top cover 124, improving the sealing performance at the connection between the flange 133 and the top cover 124.

[0043] Reference Figure 2 , Figure 8 and Figure 10In one embodiment, guide holes 1211 are formed at the four corners of the support plate 121. The fixing mechanism 110 includes a fixing plate 111, a drain cylinder 112, four guide pins 113, and four buffer springs 114. The fixing plate 111 is used to connect to the support platform to install the paint gun nozzle cleaning device as a whole on the support platform. The drain cylinder 112 is vertically arranged, with a drain port 1121 at the bottom and a pressure relief port 1122 at the top. The top is detachably connected to the bottom of the fixing plate 111. This facilitates the assembly, use, disassembly, and maintenance of the drain cylinder 112 and the fixing plate 111. The drain cylinder 112 is used to guide the cleaning medium mixed with waste paint to flow out. The four guide pins 113 are all vertically arranged, with their bottom ends fixedly connected to the four corners of the fixing plate 111, and their top ends passing through the guide holes 1211 at the four corners, guiding the up and down movement of the support plate 121. Four buffer springs 114 are fitted onto four guide pins 113 in a one-to-one correspondence, with their top ends abutting against the bottom end of the support plate 121. When the nozzle 300 is inserted into the receiving hole 131, the four buffer springs 114 are gradually compressed, providing a buffering effect, allowing the receiving hole 130 and the cleaning mechanism 120 to float up and down, preventing damage to the nozzle 300.

[0044] The implementation principle of this embodiment is as follows: The fixing mechanism 110 supports the cleaning mechanism 120 and the receiving socket 130, facilitating the overall installation of the paint gun nozzle cleaning device on the support platform. The drain port 1121 is used to discharge the cleaning medium containing waste paint. The pressure relief port 1122 is used for pressure relief. When the nozzle 300 is inserted into the receiving hole 131, the receiving socket 130 and the cleaning mechanism 120 can float up and down to prevent damage to the nozzle 300. After the nozzle 300 is inserted into the receiving hole 131, the cleaning mechanism 120 sprays the cleaning medium onto the nozzle 300 to remove the paint accumulated on the nozzle 300. The sealing mechanism 140 forms a contact seal and an air seal between the nozzle 300 and the inner wall of the receiving hole 131. By using the sealing mechanism 140 to achieve a contact seal and an air seal between the nozzle 300 and the receiving hole 131, a multiple sealing effect is achieved, effectively preventing the overflow of the cleaning medium and thus preventing secondary contamination of the spray gun or painting robot.

[0045] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A spray gun nozzle cleaning device, characterized in that, include: The fixing mechanism (110) has a drain port (1121) at the bottom and a pressure relief port (1122) at the top, and is used to connect with the support platform used in conjunction with the paint gun nozzle cleaning device. The cleaning mechanism (120) is mounted on the top of the fixing mechanism (110) in a floating manner and is connected to the fixing mechanism (110); A receiving socket (130) is installed at the top of the cleaning mechanism (120) and has a receiving hole (131) for inserting a nozzle (300) of a paint gun; the cleaning mechanism (120) sprays cleaning medium into the nozzle (300); A sealing mechanism (140) is installed on the receiving socket (130) to form a contact seal and an air seal between the nozzle (300) and the inner wall of the receiving hole (131).

2. The spray gun nozzle cleaning device according to claim 1, characterized in that, The socket (130) has a flow guide cavity (132) formed circumferentially inside; The sealing mechanism (140) includes: A sealing ring (141) is installed in the middle of the inner wall of the insertion hole (131); The lower air ring (142) has a plurality of lower air outlets uniformly formed along the circumference and is installed on the lower part of the inner wall of the insertion hole (131); each of the lower air outlets is connected to the guide cavity (132); An upper air ring (143) is uniformly formed with multiple upper air outlets along the circumference and is installed on the upper part of the inner wall of the insertion hole (131); each of the upper air outlets is connected to the guide cavity (132); The air duct (144) is fixedly connected at one end to the outer wall of the receiving socket (130) and communicates with the flow guide cavity (132).

3. The spray gun nozzle cleaning device according to claim 2, characterized in that, The sealing mechanism (140) further includes: Multiple tension springs (145) are uniformly embedded in the sealing ring (141) along the circumference of the sealing ring (141); the axial direction of each tension spring (145) is the same as the radial direction of the sealing ring (141).

4. The spray gun nozzle cleaning device according to claim 2, characterized in that, The sealing mechanism (140) further includes: The first one-way valve (146) is fixedly connected at one end to the end of the air guide pipe (144) away from the receiving socket (130), and is in communication with it; The first pneumatic control valve has one end connected to the other end of the first one-way valve (146), and the other end is used to connect to the first compressed air supply source used in conjunction with the paint gun nozzle cleaning device.

5. The spray gun nozzle cleaning device according to any one of claims 1 to 4, characterized in that, The cleaning mechanism (120) includes: The support plate (121) is mounted on the top of the fixing mechanism (110) in a floating manner. The drainage tube (122) is vertically set, with its top end fixedly connected to the bottom end of the support plate (121), and its bottom end inserted into the fixing mechanism (110) through the pressure relief port (1122); The cleaning cylinder (123) is vertically arranged, and its bottom end is fixedly connected to the top end of the support plate (121); the cross-sectional dimension of the bottom end of the cleaning cylinder (123) is smaller than the cross-sectional dimension of the top end; The top cover (124) is detachably mounted on the top of the cleaning tube (123), and the top is detachably connected to the receiving socket (130); A guide pipe (125) is installed on the support plate (121), with one end located inside the cleaning cylinder (123) and the other end located outside the cleaning cylinder (123), for inputting the cleaning medium; The adapter (126) is vertically arranged and is fixedly connected to one end of the guide pipe (125) located inside the cleaning cylinder (123), and is in communication with it; A rotating head (127) is rotatably mounted on the top of the adapter (126) and communicates with the adapter (126); There are multiple rotating rods (128), all of which are inclined and evenly distributed along the circumference of the rotating head (127). Their bottom ends are fixedly connected to the rotating head (127) and are in communication with it. Their top ends are all closed structures. At least one first nozzle (1291) is fixed on the side wall of each rotating rod (128). The second nozzle (1292) is fixed on the rotating head (127).

6. The spray gun nozzle cleaning device according to claim 5, characterized in that, The cleaning mechanism (120) further includes: The second one-way valve (1293) is fixedly connected to the end of the guide pipe (125) located outside the cleaning cylinder (123) and is in communication with it; The third one-way valve (1294) is fixedly connected to the end of the guide pipe (125) located outside the cleaning cylinder (123) and is in communication with it.

7. The spray gun nozzle cleaning device according to claim 6, characterized in that, Also includes: The switching valve has one end connected to the other end of the second check valve (1293); The needle valve has one end connected to the other end of the switch valve, and the other end is used to connect to the cleaning agent supply source used in conjunction with the paint gun nozzle cleaning device. The second pneumatic control valve has one end connected to the other end of the third one-way valve (1294), and the other end is used to connect to the second compressed air supply source used in conjunction with the paint gun nozzle cleaning device.

8. The spray gun nozzle cleaning device according to claim 5, characterized in that, A connecting ring (1241) is formed at the middle of the top of the top of the top cover (124); the outer wall of the connecting ring (1241) is threadedly connected to the inner wall of the bottom end of the socket (130); The bottom end of the socket (130) is formed with a flange (133); the flange (133) is connected to the top cover (124) by bolts.

9. The spray gun nozzle cleaning device according to claim 8, characterized in that, Also includes: A lower washer (150) is placed between the bottom end of the top cover (124) and the top end of the cleaning cylinder (123); An upper washer (160) is placed between the bottom end of the flange (133) and the top end of the top cover (124).

10. The spray gun nozzle cleaning device according to claim 5, characterized in that, Guide holes (1211) are formed at the four corners of the support plate (121); The fixing mechanism (110) includes: Fixing plate (111); The sewage discharge cylinder (112) is vertically arranged, with the sewage discharge port (1121) formed at the bottom and the pressure relief port (1122) formed at the top. The top is detachably connected to the bottom of the fixing plate (111). There are four guide pins (113), all of which are vertically arranged. Their bottom ends are fixedly connected to the four corners of the fixing plate (111), and their top ends pass through the guide holes (1211) at the four corners. There are four buffer springs (114), which are sleeved on the four guide pins (113) one by one, and their top ends abut against the bottom end of the support plate (121).

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