Self-cleaning spraying head assembly of film coating equipment

Abstract

The invention discloses a self-cleaning coating equipment nozzle assembly, and relates to the technical field of coating equipment nozzle assemblies, the self-cleaning coating equipment nozzle assembly comprises a nozzle mechanism, an auxiliary mechanism comprises two push rods, a circular ring block and two L-shaped pipes, moving blocks are fixed to the opposite ends of the push rods, two symmetrical connecting rods are fixed to one side of the circular ring block, and the two L-shaped pipes are fixed to the other side of the circular ring block. And the outer surfaces of the two connecting rods are fixedly connected with limiting rings in a sleeving mode, the outer surfaces of the two connecting rods are movably connected with spring bodies in a sleeving mode, the air outlet ends of the two L-shaped pipes are provided with check valves, and the air outlet ends of the two check valves are provided with circular pipes. According to the spray head assembly, when the spray head assembly cannot utilize the self-cleaning function to remove particles or impurities clamped in the through hole of the filter piece, the spray head assembly is assisted to remove the particles or impurities, the using effect of the spray head assembly is improved, and meanwhile the using efficiency of the spray head assembly is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of spray head assemblies of coating equipment, and specifically to a self-cleaning spray head assembly of coating equipment. Background Art

[0002] The self-cleaning spray head assembly of coating equipment is a key component of coating equipment, mainly used for evenly coating paint on the surface of a target object and being able to automatically clean itself. It is mainly applied in fields such as the furniture manufacturing industry, the automotive industry, the electronics industry, and the construction industry.

[0003] In the existing technology, during the actual use of the existing self-cleaning coating equipment spray head assembly, although it can evenly coat the paint on the surface of the target object, ensure the coating quality and reduce nozzle clogging, the self-cleaning effect is poor. It can only take away the relatively loose particles or impurities attached to the surface of the filter inside the nozzle. When there are stuck particles or impurities in the through holes of the filter inside the nozzle, at this time, relying solely on the self-cleaning function of the nozzle cannot effectively solve the problem. However, with the continuous accumulation of the stuck particles or impurities, the effective cross-sectional area of the through holes of the filter will gradually decrease, which will in turn lead to an increase in the spraying pressure of the paint and unstable flow rate, ultimately causing a nozzle clogging failure, and then affecting the service life and spraying quality of the nozzle.

[0004] Therefore, we propose a new self-cleaning spray head assembly of coating equipment to solve the problems raised in the above background art. Summary of the Invention

[0005] The purpose of the present invention is to provide a self-cleaning spray head assembly of coating equipment to solve the problem that the existing self-cleaning coating equipment spray head assembly has a poor self-cleaning effect, can only take away the relatively loose particles or impurities attached to the surface of the filter inside the nozzle. When there are stuck particles or impurities in the through holes of the filter inside the nozzle, at this time, relying solely on the self-cleaning function of the nozzle cannot effectively solve the problem. However, with the continuous accumulation of the stuck particles or impurities, the effective cross-sectional area of the through holes of the filter will gradually decrease, which will in turn lead to an increase in the spraying pressure of the paint and unstable flow rate, ultimately causing a nozzle clogging failure, and then affecting the service life and spraying quality of the nozzle.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A self-cleaning spray head assembly of coating equipment, including a nozzle mechanism, and an auxiliary mechanism is provided on the nozzle mechanism;

[0007] The auxiliary mechanism includes two push rods, a circular ring block and two L-shaped tubes. Moving blocks are fixed to the opposite ends of the push rods. Two symmetrically arranged connecting rods are fixed to one side of the circular ring block. Limiting rings are fixedly sleeved on the outer surfaces of the two connecting rods. Spring bodies are movably sleeved on the outer surfaces of the two connecting rods. Inclined blocks are installed at one end of each of the two connecting rods. Check valves are installed at the air outlet ends of the two L-shaped tubes. Circular tubes are installed at the air outlet ends of the two check valves.

[0008] Preferably, the edges of the opposite sides of the two moving blocks are respectively in contact with the inclined surfaces of the two inclined blocks, and one ends of the two spring bodies are respectively fixed to the surfaces of the two inclined blocks.

[0009] Preferably, the nozzle mechanism includes a nozzle housing. The opposite ends of the two push rods respectively pass through the front surface and the rear surface of the nozzle housing movably. The two moving blocks are both inside the nozzle housing. A nozzle cap is threadedly connected to the front end of the nozzle housing.

[0010] Preferably, a flow divider is fixedly sleeved inside the nozzle housing near the front end. The circular ring block is movably sleeved inside the flow divider. One sides of the two limiting rings are respectively in contact with one side of the inner wall of the flow divider. One ends of the two connecting rods respectively pass through one side of the inner wall of the flow divider movably. The other ends of the two spring bodies are respectively fixed to one side of the flow divider.

[0011] Preferably, the air inlet ends of the two L-shaped tubes are fixedly penetrated through one side of the flow divider, and the interiors of the two L-shaped tubes are both communicated with the interior of the flow divider. A cylindrical hole is formed in the middle position of one side of the flow divider. A tapered tube is fixedly sleeved inside the cylindrical hole. The air outlet ends of the two circular tubes are fixedly penetrated through the outer wall of the tapered tube, and the interiors of the two circular tubes are both communicated with the interior of the tapered tube.

[0012] Preferably, a sealing sleeve is arranged on the outer surface of the tapered end of the tapered tube. The outer wall of the sealing sleeve is adhesively connected to the inner surface of the nozzle cap. A three-way shell is installed at the feeding end of the tapered tube. A shell cover is installed on one side of the three-way shell. A diversion block is fixedly sleeved inside the three-way shell.

[0013] Preferably, an auxiliary block is fixedly sleeved inside the three-way shell. The interior of the diversion block is communicated with the interior of the auxiliary block. A tapered block is arranged inside the auxiliary block. Two symmetrically arranged limiting rods are fixed to one side of the tapered block. One ends of the two limiting rods respectively pass through the surface of the shell cover movably. A return spring is fixed to one side of the tapered block.

[0014] Preferably, one end of the return spring is fixed to the surface of the shell cover, the other end of the return spring is fixed to one side of the conical block, an installation hole is formed in the inner wall of the three-port shell, the inside of the installation hole communicates with the inside of one of the discharge ends of the three-port shell, and a filter sheet is fixed inside the installation hole.

[0015] Preferably, connecting heads are fixed to the air inlet end of the diverter, the feed end of the three-port shell, and the other discharge end of the three-port shell. The threaded ends of the three connecting heads all movably penetrate the bottom inner wall of the nozzle housing. A check valve is threadedly connected to the threaded end of one of the connecting heads, and a rectangular plate is installed on one side of the nozzle housing.

[0016] Preferably, two symmetrically arranged U-shaped blocks are fixed to the bottom inner wall of the nozzle housing. Rectangular blocks are installed inside the two U-shaped blocks, and the opposite surfaces of the two rectangular blocks are respectively fixed to the front surface and the rear surface of the three-port shell.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. By setting the auxiliary mechanism in the present invention, when the nozzle assembly cannot remove the particles or impurities stuck inside the through holes of the filter sheet by using the self-cleaning function, the auxiliary nozzle assembly can remove them, which not only improves the use effect of the nozzle assembly, but also improves the use efficiency of the nozzle assembly. When there are particles or impurities stuck inside the through holes of the filter sheet and the self-cleaning function of the nozzle mechanism cannot be used for cleaning, first stop the coating delivery pipe of the coating equipment from delivering coating to the check valve, and then use the cooperation of the nozzle housing, two push rods, two moving blocks, two connecting rods and two inclined blocks to make the ring move horizontally. At the same time, by using the cooperation of the two inclined blocks and the diverter, the two spring bodies can be compressed. When the ring block cannot move anymore, the compressed air entering the diverter will directly be split and enter the two L-shaped pipes.

[0019] 2. Then, by using the cooperation of the two L-shaped pipes, two check valves and two round pipes in the present invention, the compressed air can be delivered into the tapered pipe. Then, by using the cooperation of the compressed air entering the tapered pipe, the coating inside the tapered pipe can be pushed towards the filter sheet, and at the same time, the particles or impurities stuck inside the through holes of the filter sheet can be pushed out. After that, by using the cooperation of the self-cleaning components of the nozzle assembly, the coating mixed with particles or impurities can be transported into the waste delivery pipe of the coating equipment and then transported away.

[0020] 3. By setting up the nozzle mechanism, the present invention can mix the compressed air and the coating delivered by the coating equipment and evenly spray them on the surface of the target object. When the self-cleaning nozzle assembly needs to be used, first, by means of the cooperation of the corresponding connector of the diverter and the diverter, the compressed air delivered by the conveying pipe of the coating equipment can be delivered into the nozzle cap and discharged from the air outlet of the nozzle cap. Subsequently, by means of the cooperation of the one-way valve and the corresponding connector, the coating delivered by the conveying pipe of the coating equipment can be delivered into the space composed of the three-port shell, the diversion block, the auxiliary block and the conical block. Then, by means of the cooperation of the taper pipe, the coating can be ejected from the outlet of its tapered end. After that, with the cooperation of the ejected compressed air, the ejected coating can be dispersed, that is, the coating can be evenly sprayed on the surface of the target object.

[0021] 4. When the particles or impurities attached to the surface of the filter element block the through holes of the filter element, the pressure inside the above-mentioned space will increase. When the pressure inside this space reaches a certain level and continues to rise, the continuously rising pressure will steadily push the conical block out of the inside of the auxiliary block by means of the cooperation of the two limit rods and the shell cover. At the same time, by means of the cooperation of the shell cover, the return spring can also be compressed. When there is a gap between the surface of the conical block and the inner wall of the auxiliary block, the coating inside the above-mentioned space will directly pass through the gap between the two and the cooperation of the diversion block, driving the particles or impurities attached to the surface of the filter element into the connector connected to the other discharge end of the three-port shell, and then into the waste conveying pipe of the coating equipment, and then be conveyed away. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a perspective view of the self-cleaning coating equipment nozzle assembly of the present invention;

[0023] Figure 2 is a perspective view of the self-cleaning coating equipment nozzle assembly of the present invention from a side view angle;

[0024] Figure 3 is a schematic three-dimensional structure diagram of the nozzle cap and the sealing sleeve of the self-cleaning coating equipment nozzle assembly of the present invention;

[0025] Figure 4 is a partially cut-away perspective view of the self-cleaning coating equipment nozzle assembly of the present invention from a side view angle;

[0026] Figure 5 is a partially perspective view of the self-cleaning coating equipment nozzle assembly of the present invention from another angle;

[0027] Figure 6 is a partially cut-away schematic top view structure diagram of the self-cleaning coating equipment nozzle assembly of the present invention;

[0028] Figure 7This is a partially sectional perspective view from the top-down angle of the nozzle mechanism of the self-cleaning coating equipment nozzle assembly of the present invention;

[0029] Figure 8 This is a sectional perspective structural schematic diagram of the three-port shell, mounting hole and filter sheet of the nozzle assembly of the self-cleaning coating equipment of the present invention;

[0030] Figure 9 This is another partially sectional perspective view from an angle of the nozzle assembly of the self-cleaning coating equipment of the present invention;

[0031] Figure 10 This is a partially sectional perspective view from the side view angle of the nozzle mechanism of the nozzle assembly of the self-cleaning coating equipment of the present invention.

[0032] In the figure: 1. Nozzle mechanism; 101. Nozzle housing; 102. Nozzle cap; 103. Diverter; 104. Sealing sleeve; 105. Cylindrical hole; 106. Tapered tube; 107. Three-port shell; 108. Shell cover; 109. Flow guiding block; 110. Auxiliary block; 111. Conical block; 112. Limit rod; 113. Return spring; 114. Mounting hole; 115. Filter sheet; 116. Connector; 117. Check valve; 118. Rectangular plate; 2. Auxiliary mechanism; 201. Push rod; 202. Moving block; 203. Ring; 204. Connecting rod; 205. Limit ring; 206. Spring body; 207. Inclined block; 208. L-shaped tube; 209. Check valve; 210. Round tube; 3. Rectangular block; 4. U-shaped block. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment 1: Please refer to Figure 1 , Figure 2 and Figures 4 - 10 As shown, the present invention provides a technical solution: a self-cleaning coating equipment nozzle assembly, including a nozzle mechanism 1, and an auxiliary mechanism 2 is arranged on the nozzle mechanism 1;

[0035] The auxiliary mechanism 2 includes two push rods 201, a circular ring block 203 and two L-shaped tubes 208. Moving blocks 202 are fixed to the opposite ends of the push rods 201. Two symmetrically arranged connecting rods 204 are fixed to one side of the circular ring block 203. Limiting rings 205 are fixedly sleeved on the outer surfaces of the two connecting rods 204. Spring bodies 206 are movably sleeved on the outer surfaces of the two connecting rods 204. Inclined blocks 207 are installed at one ends of the two connecting rods 204. Check valves 209 are installed at the air outlet ends of the two L-shaped tubes 208. Circular tubes 210 are installed at the air outlet ends of the two check valves 209. The opposite edges of the two moving blocks 202 are respectively in contact with the inclined surfaces of the two inclined blocks 207. One ends of the two spring bodies 206 are respectively fixed to the surfaces of the two inclined blocks 207. The spray head mechanism 1 includes a spray head housing 101. The opposite ends of the two push rods 201 respectively pass through the front surface and the rear surface of the spray head housing 101 movably. The two moving blocks 202 are both inside the spray head housing 101. A diverter 103 is fixedly sleeved at a position near the front end inside the spray head housing 101. The circular ring block 203 is movably sleeved inside the diverter 103. One sides of the two limiting rings 205 are respectively in contact with one side of the inner wall of the diverter 103. One ends of the two connecting rods 204 respectively pass through one side of the inner wall of the diverter 103 movably. The other ends of the two spring bodies 206 are respectively fixed to one side of the diverter 103. The air inlet ends of the two L-shaped tubes 208 are fixedly penetrated through one side of the diverter 103, and the interiors of the two L-shaped tubes 208 are communicated with the interior of the diverter 103. A cylindrical hole 105 is opened at the middle position on one side of the diverter 103. A tapered tube 106 is fixedly sleeved inside the cylindrical hole 105. The air outlet ends of the two circular tubes 210 are fixedly penetrated through the outer wall of the tapered tube 106, and the interiors of the two circular tubes 210 are communicated with the interior of the tapered tube 106. A three-way housing 107 is installed at the feed end of the tapered tube 106. A diversion block 109 is fixedly sleeved inside the three-way housing 107. An auxiliary block 110 is fixedly sleeved inside the three-way housing 107. A tapered block 111 is arranged inside the auxiliary block 110. An installation hole 114 is opened on the inner wall of the three-way housing 107. A filter sheet 115 is fixed inside the installation hole 114. The threaded end of one of the connectors 116 is threadedly connected with a check valve 117.

[0036] In this embodiment, when there are clamped particles or impurities inside the through holes of the filter sheet 115 and they cannot be cleaned even by using the self-cleaning function of the spray head mechanism 1, at this time, the coating delivery pipe of the coating film equipment stops delivering coating to the one-way valve 117, and the compressed air delivery continues. Subsequently, one hand of the staff fixes the spray head housing 101, and the other hand makes the two push rods 201 move towards each other. At this time, both of the two push rods 201 moving towards each other will, with the cooperation of the spray head housing 101, stably drive the moving block 202 connected thereto to move. Then, the two moving blocks 202 in motion will, with the cooperation of the two connecting rods 204 and the two inclined blocks 207, drive the ring 203 to move together. At the same time, both of the two inclined blocks 207 in motion will, with the cooperation of the diverter 103, cause the corresponding spring body 206 to be compressed. When the ring block 203 cannot move anymore, at this time, the compressed air entering the diverter 103 will directly be diverted into the interiors of the two L-shaped pipes 208, then enter the interiors of the corresponding check valves 209, and then enter the interiors of the corresponding circular pipes 210, and then enter the interior of the tapered pipe 106 together. When the compressed air enters the interior of the tapered pipe 106, at this time, part of the coating inside the tapered pipe 106 will be ejected from its tapered end, and the other part will be directly delivered towards the filter sheet 115. When there is no coating ejected from the tapered end of the tapered pipe 106, at this time, block the tapered end outlet of the tapered pipe 106. At this time, all the compressed air entering the interior of the tapered pipe 106 will be delivered towards the filter sheet 115. When continuous compressed air is delivered towards the filter sheet 115, at this time, under the action of the compressed air, the particles or impurities clamped inside the through holes of the filter sheet 115 will be pushed out, and then pushed into the space composed of the three-port housing 107, the diversion block 109, the auxiliary block 110, and the tapered block 111 for storage. When the pressure inside the space composed of the three-port housing 107, the diversion block 109, the auxiliary block 110, the installation hole 114, the tapered pipe 106 blocking the tapered end outlet, the one-way valve 117, the two circular pipes 210, the two check valves 209, and the tapered block 111 rises to a certain level and continues to rise, at this time, the particles or impurities contained inside this space (the space composed of the three-port housing 107, the diversion block 109, the auxiliary block 110, and the tapered block 111) will repeat part of the working principle of the spray head mechanism 1 (the self-cleaning part) until they are transported away through the waste delivery pipe of the coating film equipment, that is, to solve the problem that particles or impurities are clamped inside the through holes of the filter sheet 115 and cannot be processed by the self-cleaning function of the spray head assembly. When the particles or impurities blocking the through holes of the filter sheet 115 are cleaned up, at this time, release the blockage of the tapered end outlet of the tapered pipe 106, and at the same time, release the force applied to the two push rods 201, and at the same time, close the injection of compressed air into the diverter 103. At this time, with the cooperation of the two spring bodies 206, the two connecting rods 204, the two inclined blocks 207, the two limit rings 205, and the two moving blocks 202, the ring 203 and the two push rods 201 can be reset to their initial positions.

[0037] Example Two: According to Figures 1 - 10 As shown, the nozzle mechanism 1 includes a nozzle housing 101. A nozzle cap 102 is threadedly connected to the front end of the nozzle housing 101. A diverter 103 is fixedly sleeved near the front end inside the nozzle housing 101. A cylindrical hole 105 is formed in the middle position on one side of the diverter 103. A tapered tube 106 is fixedly sleeved inside the cylindrical hole 105. A sealing sleeve 104 is arranged on the outer surface of the tapered end of the tapered tube 106. The outer wall of the sealing sleeve 104 is adhesively connected to the inner surface of the nozzle cap 102. A three-port housing 107 is installed at the feed end of the tapered tube 106. A housing cover 108 is installed on one side of the three-port housing 107. A guide block 109 is fixedly sleeved inside the three-port housing 107. An auxiliary block 110 is fixedly sleeved inside the three-port housing 107. The inside of the guide block 109 is in communication with the inside of the auxiliary block 110. A tapered block 111 is arranged inside the auxiliary block 110. Two symmetrically arranged limit rods 112 are fixed to one side of the tapered block 111. One end of each of the two limit rods 112 movably penetrates the surface of the housing cover 108. A return spring 113 is fixed to one side of the tapered block 111. One end of the return spring 113 is fixed to the surface of the housing cover 108, and the other end of the return spring 113 is fixed to one side of the tapered block 111. An installation hole 114 is formed in the inner wall of the three-port housing 107. The inside of the installation hole 114 is in communication with the inside of one of the discharge ends of the three-port housing 107. A filter sheet 115 is fixed inside the installation hole 114. Connecting heads 116 are fixed to the air inlet end of the diverter 103, the feed end of the three-port housing 107, and the other discharge end of the three-port housing 107. The threaded ends of the three connecting heads 116 all movably penetrate the bottom of the inner wall of the nozzle housing 101. The threaded end of one of the connecting heads 116 is threadedly connected to a check valve 117. A rectangular plate 118 is installed on one side of the nozzle housing 101. Two symmetrically arranged U-shaped blocks 4 are fixed to the bottom of the inner wall of the nozzle housing 101. Rectangular blocks 3 are installed inside the two U-shaped blocks 4. The opposite surfaces of the two rectangular blocks 3 are respectively fixed to the front surface and the rear surface of the three-port housing 107.

[0038] In this embodiment, when the self-cleaning nozzle assembly is needed, the connector 116 connected to the diverter 103 is first connected to the air outlet end of the compressed air delivery pipe of the coating equipment, and then the feed end of the one-way valve 117 is connected to the discharge end of the paint delivery pipe of the coating equipment, and then the discharge end of the connector 116 connected to the other discharge end of the three-port shell 107 is connected to the feed end of the waste delivery pipe of the coating equipment. When everything is ready, the compressed air delivery pipe of the coating equipment is directly allowed to deliver compressed air to the inside of the connector 116 connected thereto, and then the compressed air entering the connector 116 will be delivered to the inside of the diverter 103, and then to the inside of the nozzle cap 102, and then from the nozzle The paint is then passed through the through hole of the filter 115 into the conical tube 106 (at this time, the paint does not contain particles or impurities, and the particles or impurities filtered out by the filter 115 remain in the above-mentioned space), and then from the The pointed end of the pointed cone tube 106 emerges, and when the paint and compressed air meet, the shear force and pressure difference generated by the high-speed flow of the compressed air will disperse the paint into many tiny droplets (making the sprayed paint become atomized), and the atomized paint can be more evenly distributed on the surface of the coated object. When there are more particles or impurities attached to the surface of the filter 115 (especially at the inlet of the through hole of the filter 115), which affects the paint from passing through the through hole of the filter 115, the pressure inside the above space will continue to increase due to the continuous input of paint. When the pressure inside the space reaches a certain level and continues to increase, the continuously increasing pressure in the space will stably push the cone under the cooperation of the two limit rods 112 and the shell cover 108. The block 111 is pushed out from the inside of the auxiliary block 110, and the moving conical block 111 will also compress the return spring 113 with the cooperation of the shell cover 108. When a gap appears between the surface of the conical block 111 and the inner wall of the auxiliary block 110, the paint inside the space will directly drive the particles or impurities attached to the surface of the filter plate 115 into the inside of the guide block 109, and then pass through the gap between the two, and then enter the connector 116 connected to the other discharge end of the three-port shell 107, and then be transported to the waste conveying pipe of the coating equipment, and then be transported away. When the internal pressure of the above space returns to the initial state, at this time, with the rebound force of the two return springs 113, the cooperation of the two limit rods 112 and the shell cover 108,The conical block 111 will quickly and automatically reset back inside the auxiliary block 110 to continue normal operation, that is, to achieve the self-cleaning operation of the nozzle assembly.

[0039] The effect and working principle of the whole mechanism are as follows: when the self-cleaning nozzle assembly is needed, the connector 116 connected to the diverter 103 is first connected to the air outlet end of the compressed air delivery pipe of the coating equipment, and then the feed end of the one-way valve 117 is connected to the discharge end of the paint delivery pipe of the coating equipment, and then the discharge end of the connector 116 connected to the other discharge end of the three-port shell 107 is connected to the feed end of the waste delivery pipe of the coating equipment. When everything is ready, the compressed air delivery pipe of the coating equipment is directly allowed to deliver compressed air to the inside of the connector 116 connected thereto, and then the compressed air entering the connector 116 will be delivered to the inside of the diverter 103, and then delivered to the nozzle cap 102. , and then sprayed out from each air outlet of the nozzle cap 102. When each air outlet of the nozzle cap 102 sprays compressed air, the paint delivery pipe of the coating equipment will then deliver the paint to the one-way valve 117 connected thereto. The paint that enters the one-way valve 117 will then enter the corresponding connector 116, and then through the cooperation of the two rectangular blocks 3 and the two U-shaped blocks 4, it will stably enter the space composed of the three-mouth shell 107, the guide block 109, the auxiliary block 110 and the conical block 111. After entering this space, the paint will pass through the through hole of the filter plate 115 and enter the interior of the pointed cone tube 106 (at this time, the paint does not contain particles or impurities, and the particles or impurities filtered out by the filter plate 115 remain in the above-mentioned space). ), and then emerges from the pointed end of the pointed cone tube 106. When the paint and the compressed air meet, the shear force and pressure difference generated by the high-speed flow of the compressed air will disperse the paint into many tiny droplets (making the sprayed paint atomized), and the atomized paint can be more evenly distributed on the surface of the coated object. When the surface of the filter 115 (especially the inlet of the through hole of the filter 115) is attached with more particles or impurities, which affects the paint from passing through the through hole of the filter 115, the pressure inside the above space will continue to increase due to the continuous input of paint. When the internal pressure of the space reaches a certain level and continues to increase, the continuously increasing pressure of the space will be stably controlled by the cooperation of the two limit rods 112 and the shell cover 108. The conical block 111 is pushed out from the inside of the auxiliary block 110. At the same time, the moving conical block 111 will also compress the return spring 113 with the cooperation of the shell cover 108. When a gap appears between the surface of the conical block 111 and the inner wall of the auxiliary block 110, the paint inside the space will directly drive the particles or impurities attached to the surface of the filter plate 115 into the inside of the guide block 109, and then pass through the gap between the two, and then enter the connector 116 connected to the other discharge end of the three-port shell 107, and then be transported to the waste conveying pipe of the coating equipment, and then be transported away. When the internal pressure of the above space returns to the initial state, at this time, with the rebound force of the two return springs 113, the cooperation of the two limit rods 112 and the shell cover 108,The conical block 111 will quickly and automatically reset back into the interior of the auxiliary block 110 and continue normal operation, that is, to achieve the self-cleaning operation of the nozzle assembly. When there are clamped particles or impurities inside the through-holes of the filter disc 115 and the self-cleaning function of the nozzle mechanism 1 cannot be used for cleaning, at this time, the coating delivery pipe of the coating equipment stops delivering coating to the one-way valve 117, and continues to deliver compressed air. Subsequently, one hand of the operator fixes the nozzle housing 101, and the other hand moves the two push rods 201 towards each other. At this time, both of the two push rods 201 moving towards each other will, with the cooperation of the nozzle housing 101, stably drive the moving blocks 202 connected thereto to move. Then, the two moving blocks 202 in motion will, with the cooperation of the two connecting rods 204 and the two inclined blocks 207, drive the ring 203 to move together. At the same time, both of the two inclined blocks 207 in motion will, with the cooperation of the diverter 103, cause the corresponding spring bodies 206 to be compressed. When the ring block 203 cannot move any further, at this time, the compressed air entering the interior of the diverter 103 will directly be diverted into the interiors of the two L-shaped pipes 208, then enter the interiors of the corresponding check valves 209, then enter the interiors of the corresponding round pipes 210, and then enter the interior of the tapered pipe 106 together. When the compressed air enters the interior of the tapered pipe 106, at this time, part of the coating inside the tapered pipe 106 will be ejected from its tapered end, and the other part will be directly delivered towards the filter disc 115. When there is no coating ejected from the tapered end of the tapered pipe 106, at this time, the tapered end outlet of the tapered pipe 106 is blocked, and at this time, all of the compressed air entering the interior of the tapered pipe 106 will be delivered towards the filter disc 115. When continuous compressed air is delivered towards the filter disc 115, at this time, under the action of the compressed air, the particles or impurities clamped inside the through-holes of the filter disc 115 will be pushed out, and then pushed into the space composed of the three-port housing 107, the diversion block 109, the auxiliary block 110, and the conical block 111 for storage. When the pressure inside the space composed of the three-port housing 107, the diversion block 109, the auxiliary block 110, the installation hole 114, the tapered pipe 106 with its tapered end outlet blocked, the one-way valve 117, the two round pipes 210, the two check valves 209, and the conical block 111 rises to a certain level and continues to rise, at this time, the particles or impurities contained inside this space (the space composed of the three-port housing 107, the diversion block 109, the auxiliary block 110, and the conical block 111) will repeat the above operation steps along with the coating until they are transported away through the waste delivery pipe of the coating equipment, that is, to solve the problem that particles or impurities are clamped inside the through-holes of the filter disc 115 and cannot be treated with the self-cleaning function of the nozzle assembly. When the particles or impurities blocking the through-holes of the filter disc 115 are cleared, at this time, the blockage of the tapered end outlet of the tapered pipe 106 is released, and at the same time, the force applied to the two push rods 201 is released, and at the same time, the injection of compressed air into the interior of the diverter 103 is closed. At this time, with the cooperation of the two spring bodies 206, the two connecting rods 204, the two inclined blocks 207, the two limiting rings 205, and the two moving blocks 202,The ring 203 and the two push rods 201 can both be reset to their initial positions.

[0040] Among them, the diverter 103, the three-port housing 107, the connector 116, the check valve 117 and the non-return valve 209 are all prior arts, and their models can be selected according to actual situations and will not be explained in detail here.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-cleaning coating equipment nozzle assembly, characterized in that: It comprises a nozzle mechanism (1), wherein the nozzle mechanism (1) is provided with an auxiliary mechanism (2); The auxiliary mechanism (2) comprises two push rods (201), a circular ring block (203) and two L-shaped tubes (208); a moving block (202) is fixed to the opposite end of each push rod (201); two symmetrical connecting rods (204) are fixed to one side of each circular ring block (203); a limiting ring (205) is fixedly sleeved on the outer surfaces of the two connecting rods (204); a spring body (206) is movably sleeved on the outer surfaces of the two connecting rods (204); an inclined block (207) is installed at one end of each connecting rod (204); a check valve (209) is installed at the air outlet end of each L-shaped tube (208); and a circular tube (210) is installed at the air outlet end of each check valve (209).

2. The self-cleaning coating equipment nozzle assembly according to claim 1, characterized in that: The edges of the opposite sides of the two moving blocks (202) are in contact with the inclined surfaces of the two inclined blocks (207) respectively, and one end of the two spring bodies (206) is fixed to the surfaces of the two inclined blocks (207) respectively.

3. The self-cleaning coating equipment nozzle assembly according to claim 1, characterized in that: The nozzle mechanism (1) comprises a nozzle housing (101), the opposite ends of the two push rods (201) respectively movably penetrate the front surface of the nozzle housing (101) and the rear surface of the nozzle housing (101), the two moving blocks (202) are both located inside the nozzle housing (101), and the front end of the nozzle housing (101) is threadedly connected with a nozzle cap (102).

4. The self-cleaning coating equipment nozzle assembly according to claim 3, characterized in that: A flow diverter (103) is fixedly sleeved inside the nozzle housing (101) near the front end, the annular block (203) is movably sleeved inside the flow diverter (103), one side of the two limit rings (205) are in contact with one side of the inner wall of the flow diverter (103), one end of the two connecting rods (204) are movably passed through one side of the inner wall of the flow diverter (103), and the other ends of the two spring bodies (206) are fixed to one side of the flow diverter (103).

5. The self-cleaning coating equipment nozzle assembly according to claim 4, characterized in that: The air inlet ends of the two L-shaped tubes (208) are fixedly passed through one side of the flow splitter (103), and the interiors of the two L-shaped tubes (208) are communicated with the interior of the flow splitter (103); a cylindrical hole (105) is provided in the middle of one side of the flow splitter (103), and a pointed cone tube (106) is fixedly sleeved inside the cylindrical hole (105); the air outlet ends of the two circular tubes (210) are fixedly passed through the outer wall of the pointed cone tube (106), and the interiors of the two circular tubes (210) are communicated with the interior of the pointed cone tube (106).

6. The nozzle assembly of the self-cleaning coating equipment according to claim 5, characterized in that: A sealing sleeve (104) is provided on the outer surface of the tapered end of the tapered tube (106); the outer wall of the sealing sleeve (104) is bonded to the inner surface of the nozzle cap (102); a three-mouth shell (107) is installed at the feed end of the tapered tube (106); a shell cover (108) is installed on one side of the three-mouth shell (107); and a guide block (109) is fixedly sleeved inside the three-mouth shell (107).

7. The self-cleaning coating equipment nozzle assembly according to claim 6, characterized in that: An auxiliary block (110) is fixedly sleeved inside the three-port shell (107), the interior of the guide block (109) is connected to the interior of the auxiliary block (110), a conical block (111) is arranged inside the auxiliary block (110), two symmetrical limiting rods (112) are fixed on one side of the conical block (111), one end of the two limiting rods (112) are movably penetrated through the surface of the shell cover (108), and a return spring (113) is fixed on one side of the conical block (111).

8. The nozzle assembly of the self-cleaning coating equipment according to claim 7, characterized in that: One end of the return spring (113) is fixed to the surface of the shell cover (108), and the other end of the return spring (113) is fixed to one side of the conical block (111). A mounting hole (114) is provided on the inner wall of the three-mouth shell (107), and the interior of the mounting hole (114) is connected to the interior of one of the discharge ends of the three-mouth shell (107). A filter sheet (115) is fixed to the interior of the mounting hole (114).

9. The self-cleaning coating equipment nozzle assembly according to claim 6, characterized in that: The air inlet end of the flow divider (103), the feed end of the three-port shell (107) and the other discharge end of the three-port shell (107) are all fixed with connectors (116), and the threaded ends of the three connectors (116) are all movable through the bottom of the inner wall of the nozzle shell (101), and the threaded end of one of the connectors (116) is threadedly connected to a one-way valve (117), and a rectangular plate (118) is installed on one side of the nozzle shell (101).

10. The nozzle assembly of the self-cleaning coating equipment according to claim 6, characterized in that: Two symmetrical U-shaped blocks (4) are fixed to the bottom of the inner wall of the nozzle housing (101), and rectangular blocks (3) are installed inside the two U-shaped blocks (4). The opposite sides of the two rectangular blocks (3) are respectively fixed to the front surface of the three-port shell (107) and the rear surface of the three-port shell (107).

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