Three-proofing paint feeding assembly and spraying device

Abstract

The utility model discloses a conformal coating feeding assembly and a spraying device. The conformal coating feeding assembly comprises a first storage barrel, a pressure mechanism and a spraying head, and an air inlet and an air outlet are formed in the first storage barrel; the air inlet is communicated with the air pressure mechanism; a second storage barrel is arranged between the first storage barrel and the spray head; the capacity of the second material storage barrel (13) is 200 to 500 ml; a feed port, a discharge port and an air suction port are formed in the second storage barrel; the discharge hole is communicated with the spray head; the air suction port is communicated with the air outlet; and a sealing cover is arranged on the feeding hole. The small-capacity second storage barrel is additionally arranged between the first storage barrel and the spray head, so that the communication distance between the conformal coating and the spray head is shortened, the filling amount of the conformal coating is reduced, and waste of excessive conformal coating is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to in circuit board processing technical field especially, relate to a kind of three-proof paint feeding assembly and spraying device. BACKGROUND

[0002] Current circuit board often needs to be sprayed three-proof paint after production, three-proof paint is a kind of special formula paint, for protecting circuit board and its related equipment from the erosion of environment, to improve and prolong the service life of circuit board, ensure the safety and reliability of use.

[0003] In prior art, three-proof paint spraying equipment usually includes pressure mechanism, pressure mechanism is communicated with first storage barrel, and first storage barrel is communicated with spray head by 4-5 meters conveying pipe. First storage barrel is usually 5L large capacity, not only inconvenient for small-dose three-proof paint feeding, but also not easy to install and control injection volume, in practice, actual spraying dosage usually only needs 50ml, and the minimum injection volume of first storage barrel is 200ml, so there is 150ml waste. After each spraying is completed, to avoid pipeline blockage, first storage barrel and conveying pipeline must also be cleaned, not only difficult to clean, but also waste a large amount of three-proof paint material. Therefore, there is an urgent need for a three-proof paint spraying equipment which can reduce three-proof paint injection volume and material residue, and is convenient to disassemble and clean. SUMMARY

[0004] In view of this, the present application aims to at least solve the problems in the related art, and one of the purposes of the present application is to provide a three-proof paint feeding assembly, which comprises a first storage barrel, a pressure mechanism and a spray head, an air inlet and an air outlet are provided on the first storage barrel; the air inlet is communicated with the air pressure mechanism; a second storage barrel is provided between the first storage barrel and the spray head; the capacity of the second storage barrel is 200-500ml; a feeding port, a discharging port and an air suction port are provided on the second storage barrel; the discharging port is communicated with the spray head; the air suction port is communicated with the air outlet; a sealing cover is provided on the feeding port.

[0005] The amount of the suction solution needs to ensure that transmission can be carried out and good spraying effect is obtained, so there is a minimum filling amount. The liquid of the three-proof paint in a large-capacity container cannot be sucked and transmitted if the liquid is too little, and the small-capacity container is relatively easy to be sucked and transmitted. The application adds a second discharge barrel with a capacity of 200-500 ml between the first discharge barrel and the spray head. Compared with the original use of a large-capacity first storage barrel for feeding, a minimum filling amount of 200 ml is required. The application directly feeds the second storage barrel between the spray head and the first storage barrel, and only a minimum three-proof paint filling amount of 20 ml is required for transmission. The pressure mechanism includes a booster pump, which connects the air outlet on the first storage barrel (the original storage barrel) with the air suction port of the second storage barrel, so that the first storage barrel can deliver air pressure to the second storage barrel. During three-proof paint spraying operation, the sealing cover is opened, and the second storage barrel is filled with three-proof paint as needed through the feeding port. Then the sealing cover is closed, the booster pump is started, and the air pressure value is set to 0.4-0.6 MPA. The air pressure enters the first storage barrel and then enters the air suction port of the second storage barrel from the air outlet, pushing the three-proof paint in the second storage barrel to be delivered from the discharge port to the spray head for spraying the circuit board. One of the important reasons for the serious waste of three-proof paint is that the communication distance between the first storage barrel and the spray head is too long, resulting in too much three-proof paint remaining in the long pipeline after spraying, which needs to be cleaned. By adding the second storage barrel between the first storage barrel and the spray head, the communication distance between the three-proof paint and the spray head is reduced, the filling amount of the three-proof paint is reduced, too much three-proof paint material is avoided, the material filling is more convenient, the second storage barrel can be directly filled, and the second storage barrel and the shorter delivery pipe can be easily disassembled and cleaned, greatly saving cleaning materials and materials, and achieving the purpose of reducing cost and increasing efficiency.

[0006] In the preferred technical scheme of the present application, the discharge port and the spray head are communicated through a delivery pipe with a length of 10-50 cm.

[0007] The communication length of the discharge port and the spray head needs to be within a proper range. Too long distance is not conducive to cleaning, and too short distance is easy to adversely affect the operation of the spray head. The delivery pipe with a length of 10-50 cm can make the three-proof paint flow smoothly into the spray head, and reduce the cleaning length of the delivery pipe, thereby saving the amount of three-proof paint and cleaning materials.

[0008] In the preferred technical scheme of the present application, the pipe opening diameter of the delivery pipe is 3-6 mm.

[0009] Specifically, the diameter of the delivery pipe is very important to the spraying effect of the three-proof paint. If a large spraying force is required, a delivery pipe with a larger diameter is required. If soft spraying is required, a delivery pipe with a smaller diameter should be selected.

[0010] In the preferred technical scheme of the present application, a liquid level sensor and an alarm are further included. The liquid level sensor is arranged at the bottom of the second storage barrel, and the liquid level sensor is electrically connected with the alarm.

[0011] The liquid level sensor installed at the bottom of the second storage barrel is beneficial to real-time monitoring of the liquid level in the second storage barrel. When the liquid level in the second storage barrel is too low, the photoelectric switch on the liquid level sensor is closed, triggering the alarm to emit an alarm sound, prompting that the liquid level is too low, and preventing the liquid level of the three-proof paint from being too low. The liquid level of the three-proof paint being too low is not ideal for the spraying effect on the circuit board and adversely affects the quality of the circuit board. When the liquid level is in a safe position, the photoelectric switch is in an open state, and the alarm is in a closed state.

[0012] In the preferred technical scheme of the utility model, the second storage barrel is detachably connected with the rack through a connecting piece.

[0013] The detachable connection of the second storage barrel with the rack enables the second storage barrel to be removed and cleaned at any time, reduces the cleaning time of the equipment, and saves labor time cost.

[0014] In the preferred technical scheme of the utility model, the connecting piece comprises at least one clamp, the clamp is connected with the rack, a clamp ring is arranged on the clamp, the second storage barrel is arranged in the middle of the clamp ring, and a tensioning piece is arranged on the clamp ring.

[0015] Specifically, two stainless steel clamps are installed on the rack, the two stainless steel clamps are fixed on the rack near the spray head by screws, the clamp ring is adjusted in tightness by the tensioning piece, and the tensioning piece is a screwable tensioning screw. The second storage barrel is connected with the rack by the two stainless steel clamps, the first clamp ring is 20 mm below the top edge of the second storage barrel, the second clamp ring is 60 mm above the bottom edge of the second storage barrel, and good fixing effect and convenient removal and cleaning are achieved.

[0016] The connecting piece is used for detachably connecting the second storage barrel with the rack, and the specific structure of the connecting piece can also refer to other structures in the prior art, such as bolt connection and clamping sleeve connection.

[0017] In the preferred technical scheme of the utility model, the second storage barrel comprises, from top to bottom, a feeding part, a storage part and a discharging part; the feeding part is in communication with the feeding port; the feeding part is in communication with the storage part; the discharging part is in the shape of a circular truncated cone with gradually decreasing cross section; one end of the discharging part with a larger cross section is in communication with the storage part, and the discharging port is arranged at the other end of the discharging part with a smaller cross section.

[0018] Specifically, the three-proof paint material flows through the feeding part, the storage part and the discharging part in sequence from the feeding port, the discharging part is in the shape of a circular truncated cone with gradually decreasing cross section, the discharging port is arranged at the end of the discharging part with a smaller cross section, the problem of incomplete discharge of the three-proof paint can be effectively avoided, the three-proof paint can flow into the conveying pipe quickly, and the three-proof paint liquid can be prevented from being sucked back.

[0019] The second storage barrel is made of transparent acrylic material, and can directly show the remaining amount and flow speed of the three-proofing paint, so that the three-proofing paint in the second storage barrel can be conveniently and timely fed and visually observed.

[0020] In the preferable technical scheme of the utility model, the air inlet is arranged on the sealing cover.

[0021] The air inlet is arranged on the sealing cover, which not only realizes compact design of the second storage barrel, but also is beneficial to controlling the flow direction of the gas and improving the working efficiency of the gas pressure on the three-proofing paint.

[0022] In the preferable technical scheme of the utility model, the air inlet is communicated with the air outlet through the air guide pipe with a pipe diameter of 3-5 mm.

[0023] The diameter of the air guide pipe has important influence on the pipeline resistance of the gas pressure delivery, the air inlet is communicated with the air outlet on the storage barrel through the air guide pipe with a diameter of 4 mm, the gas pressure is delivered to the second storage barrel, and good gas pressure delivery efficiency and stability are realized. The sealing cover is internally provided with a rubber ring, and the sealing cover and the feeding port are both provided with threads. The threads of the feeding port are connected with the threads of the sealing cover, and the rubber ring is matched to realize sealing of the second storage barrel, so that the input gas pressure can work on the three-proofing paint in the second storage barrel, the liquid three-proofing paint is pushed to the spray head, the three-proofing paint in the tank is effectively used, and the residual three-proofing paint is reduced.

[0024] The second purpose of the application is to provide a three-proofing paint spraying device comprising the three-proofing paint feeding assembly.

[0025] The three-proofing paint spraying device only needs to add the second storage barrel between the first storage barrel and the spray head, and communicate the air inlet of the second storage barrel with the air outlet of the first storage barrel, and communicate the discharge port of the second storage barrel with the spray head. The capacity of the first storage barrel is usually 5L, and the capacity of the second storage barrel is usually 200-500ml. The second storage barrel is used for feeding for small-dose three-proofing paint spraying operation, and the first storage barrel is used for feeding for large-dose three-proofing paint spraying operation. Because the second storage barrel is located between the first storage barrel and the spray head, the communication distance between the second storage barrel and the spray head is much smaller than the communication distance between the first storage barrel and the spray head, so that the area of the second storage barrel and its delivery pipe to be cleaned after spraying is small, and the situation that a large amount of three-proofing paint is wasted when spraying small-dose three-proofing paint is avoided, and the manual cleaning pressure is reduced.

[0026] Compared with the prior art, the technical scheme has the following advantages: the air outlet of the first storage barrel is communicated with the air inlet of the second storage barrel, during the three-proofing paint spraying operation, the sealing cover is opened, and the three-proofing paint is added into the second storage barrel through the feeding port as needed. Then the sealing cover is closed, the air pressure mechanism is opened, and the air pressure value is set to 0.4-0.6MPA, so that the air pressure enters the second storage barrel from the air inlet, and the three-proofing paint in the second storage barrel is pushed to the nozzle through the discharge port for spraying the circuit board. After the spraying is completed, only the second storage barrel and the pipeline connected with the nozzle need to be cleaned. One of the important reasons for the serious waste of three-proofing paint is that the communication distance between the first storage barrel and the nozzle is too long, so that a large amount of three-proofing paint remains in the long pipeline after spraying and needs to be cleaned. By adding the second storage barrel between the first storage barrel and the nozzle, the communication distance between the three-proofing paint and the nozzle is reduced, the addition amount of the three-proofing paint during small-dose spraying is reduced, and a large amount of three-proofing paint is avoided from being wasted. When the capacity of the second storage barrel is 300ml, and the communication distance between the second storage barrel and the nozzle is 20cm, the addition amount of the three-proofing paint is reduced from the original minimum 200ml to 20ml, and the amount of the three-proofing paint wasted is greatly reduced, so that the amount of the three-proofing paint is greatly saved. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate preferred embodiments of the present application and, together with the description, serve to explain the principles of the application.

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0029] In the drawings:

[0030] Figure 1 It is a schematic view of a three-proofing paint feeding assembly of the present application, wherein the dotted line connection represents the communication of the air guide pipe; and the solid line connection represents the communication of the conveying pipe;

[0031] Figure 2 It is a schematic view of a second storage barrel of the present application.

[0032] Reference signs:

[0033] 11, booster pump; 12, first storage barrel; 121, air inlet; 122, air outlet; 13, second storage barrel; 131, air inlet; 132, discharge port; 133, clamp; 134, liquid level sensor; 135, sealing cover; 14, nozzle. DETAILED DESCRIPTION

[0034] In order to make the technical features, objectives and effects of the present application clearer, the specific embodiments of the present application will be described in detail below. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or positional relationships shown in the drawings, constructed and operated in a specific direction, and are only for the convenience of describing the technical solutions, and do not indicate that the indicated mechanisms or elements must have a specific direction, so it cannot be understood as a limitation on the present application.

[0035] It should also be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing", "setting" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located on another element, or one or more intervening elements can exist. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features with "first", "second", "third" and the like can explicitly or implicitly include one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In the following description, specific details such as specific system structures, techniques, etc. are presented in order to thoroughly understand the embodiments of the present application. However, those skilled in the art should understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, mechanisms, circuits and methods are omitted to avoid unnecessary details that hinder the description of the present application.

[0037] Embodiment 1

[0038] As Figure 1 and Figure 2As shown, the embodiment provides a three-proofing paint feeding assembly, which comprises a first storage barrel 12, a pressure mechanism and a spray head 14, the first storage barrel 12 is provided with an air inlet 121 and an air outlet 122; the air inlet 121 is communicated with the air pressure mechanism; a second storage barrel 13 is arranged between the first storage barrel 12 and the spray head 14; the capacity of the second storage barrel 13 is 200-500ml; the second storage barrel 13 is provided with a feeding port, a discharging port 132 and an air suction port 131; the discharging port 132 is communicated with the spray head 14; the air suction port 131 is communicated with the air outlet 122; the feeding port is provided with a sealing cover 135.

[0039] Specifically, the amount of solution to be sucked needs to ensure that it can be transmitted and have good spraying effect, so there is a minimum filling amount. The three-proofing paint in the large-capacity container cannot be sucked and transmitted because the liquid is too little, and the small-capacity container is relatively easy to be sucked and transmitted. The present application adds a 200-500ml second discharging barrel 13 between the first discharging barrel 12 and the spray head 14. Compared with the original minimum 200ml filling amount required for feeding by using the large-capacity first storage barrel 12, the present application directly feeds the second storage barrel 13 located between the spray head 14 and the first storage barrel 12, and only needs a minimum of 20ml three-proofing paint filling amount to be transmitted. The pressure mechanism includes a booster pump 11, which communicates the air outlet 122 of the first storage barrel 12 with the air suction port 131 of the second storage barrel 13, so that the first storage barrel 12 can deliver air pressure to the second storage barrel 13. During three-proofing paint spraying operation, open the sealing cover 135, and add three-proofing paint to the second storage barrel 13 as needed through the feeding port. Then close the sealing cover 135, start the booster pump 11, and set the air pressure value to 0.4MPA. After the air pressure enters the first storage barrel 12, it enters the air suction port 131 of the second storage barrel 13 from the air outlet 122, pushes the three-proofing paint in the second storage barrel 13 to be delivered from the discharging port 132 to the spray head 14, and sprays the circuit board. One of the important reasons for the serious waste of three-proofing paint is that the communication distance between the first storage barrel 12 and the spray head 14 is too far, resulting in too much three-proofing paint remaining in the long pipeline after spraying, which needs to be cleaned. By adding the second storage barrel 13 between the first storage barrel 12 and the spray head 14, the communication distance between the three-proofing paint and the spray head 14 is reduced, the filling amount of the three-proofing paint is reduced, too much three-proofing paint material is avoided, the material filling is more convenient, the material filling can be directly added in the second storage barrel 13, and the second storage barrel 13 and the shorter delivery pipe can be easily disassembled and cleaned, which greatly saves cleaning materials and materials, and achieves the purpose of reducing cost and increasing benefit.

[0040] Preferably, the discharging port 132 and the spray head 14 are communicated through a 10-50cm delivery pipe.

[0041] The length of the communication between the outlet 132 and the nozzle 14 needs to be in a proper range, too long distance is not conducive to cleaning, and too short distance is easy to cause adverse effects on the operation of the nozzle 14. The length of the delivery pipe in the embodiment is 10 cm, which can make the three-proofing paint flow smoothly into the nozzle 14, and reduce the cleaning length of the delivery, thereby saving the amount of three-proofing paint and cleaning materials.

[0042] Preferably, the diameter of the pipe opening of the delivery pipe is 3-6 mm.

[0043] Specifically, the diameter of the delivery pipe is very important to the spraying effect of the three-proofing paint. If a large spraying force is needed, a delivery pipe with a larger diameter is needed, and if a soft spraying is needed, a delivery pipe with a smaller diameter should be selected. In the embodiment, a delivery pipe with a diameter of 3 mm is adopted, which has a good spraying effect on the circuit board.

[0044] Preferably, the capacity of the second storage barrel 13 is 200-500 ml.

[0045] The amount of the solution to be sucked needs to ensure good transmission and good spraying effect, so there is a minimum amount of suction. The three-proofing paint liquid in a large-capacity container cannot be sucked and transmitted, and the three-proofing paint liquid in a small-capacity container is relatively easy to be sucked and transmitted. In the embodiment, the capacity of the second storage barrel 13 is 200 ml, which is arranged on the rack near the nozzle 14. Only a small amount of three-proofing paint liquid can be transmitted, and it is convenient to disassemble and clean and to add liquid. It has higher practicability. Only the small-capacity second storage barrel 13 and the short delivery pipe need to be cleaned, which greatly reduces the workload of cleaning and reduces resource waste.

[0046] Preferably, the air inlet 131 is communicated with the air outlet 122 through a gas guide pipe with a pipe opening diameter of 3-5 mm.

[0047] The diameter of the gas guide pipe has an important influence on the pipeline resistance of the air pressure transmission. In the embodiment, the air inlet 131 is communicated with the air outlet 122 on the storage barrel through a gas guide pipe with a diameter of 3 mm, which transmits the air pressure to the second storage barrel 13 and realizes good air pressure transmission efficiency and stability. The air inlet 131 is arranged on the sealing cover 135, which realizes the compact design of the second storage barrel 13. The sealing cover 135 is internally provided with a rubber ring, and the sealing cover 135 and the inlet are both provided with threads. The threads of the inlet are connected with the threads of the sealing cover, and cooperate with the rubber ring to realize the sealing of the second storage barrel 13, so that the input air pressure can do work on the three-proofing paint in the second storage barrel 13, push the liquid three-proofing paint to the nozzle 14, promote the effective use of the three-proofing paint in the tank, and reduce the residue of the three-proofing paint.

[0048] Embodiment 2

[0049] As Figure 1 and Figure 2As shown, the embodiment provides a three-proofing paint feeding assembly, which comprises a first storage barrel 12, a pressure mechanism and a spray head 14, the first storage barrel 12 is provided with an air inlet 121 and an air outlet 122; the air inlet 121 is communicated with the air pressure mechanism; the first storage barrel 12 and the spray head 14 are provided with a second storage barrel 13; the capacity of the second storage barrel 13 is 200-500 ml; the second storage barrel 13 is provided with a feeding port, a discharging port 132 and an air suction port 131; the discharging port 132 is communicated with the spray head 14; the air suction port 131 is communicated with the air outlet 122; the feeding port is provided with a sealing cover 135.

[0050] Specifically, the amount of solution to be sucked needs to ensure that it can be transmitted and have good spraying effect, so there is a minimum filling amount. The three-proofing paint in the large-capacity container cannot be sucked and transmitted because the liquid is too little, and the small-capacity container is relatively easy to be sucked and transmitted. The present application adds a 200-500 ml second discharging barrel 13 between the first discharging barrel 12 and the spray head 14. Compared with the original minimum 200 ml filling amount required for feeding by using the large-capacity first storage barrel 12, the present application directly feeds the second storage barrel 13 located between the spray head 14 and the first storage barrel 12, and only needs a minimum of 20 ml of three-proofing paint filling amount to be transmitted. The pressure mechanism includes a booster pump 11, which communicates the air outlet 122 of the first storage barrel 12 with the air suction port 131 of the second storage barrel 13, so that the first storage barrel 12 can deliver air pressure to the second storage barrel 13. During three-proofing paint spraying operation, open the sealing cover 135, and add three-proofing paint to the second storage barrel 13 as needed through the feeding port. Then close the sealing cover 135, start the booster pump 11, and set the air pressure value to 0.6 MPA. After the air pressure enters the first storage barrel 12, it enters the air suction port 131 of the second storage barrel 13 from the air outlet 122, pushes the three-proofing paint in the second storage barrel 13 to be delivered from the discharging port 132 to the spray head 14, and sprays the circuit board. One of the important reasons for the serious waste of three-proofing paint is that the communication distance between the first storage barrel 12 and the spray head 14 is too far, resulting in too much three-proofing paint remaining in the long pipeline after spraying, which needs to be cleaned. By adding the second storage barrel 13 between the first storage barrel 12 and the spray head 14, the communication distance between the three-proofing paint and the spray head 14 is reduced, the filling amount of the three-proofing paint is reduced, too much three-proofing paint material is avoided, the material filling is more convenient, the second storage barrel 13 can be directly filled, and it is convenient to disassemble and clean. Only the small-capacity second storage barrel 13 and the short delivery pipe need to be cleaned, which greatly saves cleaning materials and materials, achieves the purpose of reducing cost and increasing benefit.

[0051] Preferably, the discharging port 132 and the spray head 14 are communicated through a 10-50 cm delivery pipe.

[0052] The length of the communication between the discharge port 132 and the spray head 14 needs to be within a proper range, too long distance is not conducive to cleaning, too short distance is easy to cause adverse effects on the operation of the spray head 14. The length of the delivery pipe in the embodiment is 50 cm, which can make the three-proofing paint flow smoothly into the spray head 14, and reduce the cleaning length of the delivery, saving the amount of three-proofing paint and cleaning materials.

[0053] Preferably, the diameter of the pipe opening of the delivery pipe is 3-6 mm.

[0054] Specifically, the diameter of the delivery pipe is very important to the spraying effect of the three-proofing paint. If a large spraying force is needed, a delivery pipe with a larger diameter is needed, and if a soft spraying is needed, a delivery pipe with a smaller diameter should be selected. The delivery pipe with a diameter of 6 mm is adopted in the embodiment, which has a good spraying effect on the circuit board.

[0055] Preferably, the liquid level sensor 134 and the alarm are further included; the liquid level sensor 134 is arranged at the bottom of the second storage barrel 13; the liquid level sensor 134 is electrically connected with the alarm.

[0056] The installation of the liquid level sensor 134 at the bottom of the second storage barrel 13 is beneficial to the real-time monitoring of the liquid level in the second storage barrel 13. When the liquid pressure in the second storage barrel 13 is too low, the photoelectric switch on the liquid level sensor 134 is closed, triggering the alarm to issue an alarm sound, prompting that the liquid level is too low, preventing the liquid level of the three-proofing paint from being too low. The liquid level of the three-proofing paint being too low is not ideal for the spraying effect on the circuit board, and has an adverse effect on the quality of the circuit board. When the liquid level is in a safe position, the photoelectric switch is in an open state, and the alarm is in a closed state.

[0057] Preferably, the machine frame is further included; the second storage barrel 13 is detachably connected with the machine frame through the connecting piece.

[0058] The detachable connection of the second storage barrel 13 with the machine frame enables the second storage barrel 13 to be removed and cleaned at any time, reducing the cleaning time of the equipment and saving the labor cost.

[0059] Preferably, the connecting piece includes at least one clamp 133; the clamp 133 is connected with the machine frame; the clamp 133 is provided with a clamp ring; the second storage barrel 13 is arranged in the middle of the clamp ring; and the clamp ring is provided with a tensioning piece.

[0060] Specifically, two stainless steel clamps 133 are installed on the rack, and the two stainless steel clamps 133 are fixed on the rack near the spray head 14 by screws. The clamping rings are adjusted by tensioning members, which are screwable tensioning screws. The second storage barrel 13 is connected to the rack by the two stainless steel clamps 133. The first clamping ring is 20 mm below the top edge of the second storage barrel 13, and the second clamping ring is 60 mm above the bottom edge of the second storage barrel 13, achieving good fixing effect and facilitating easy disassembly and cleaning.

[0061] The connecting member serves to detachably connect the second storage barrel 13 to the rack. Its specific structure can also be referred to other structures in the prior art, such as bolt connection, sleeve connection, etc.

[0062] Preferably, the second storage barrel 13 sequentially comprises a feeding part, a storage part and a discharging part from top to bottom; the feeding part is in communication with the feeding port; the feeding part is in communication with the storage part; the discharging part is in the shape of a circular truncated cone with gradually decreasing cross section; the end of the discharging part with larger cross section is in communication with the storage part, and the discharging port 132 is arranged at the end of the discharging part with smaller cross section.

[0063] Specifically, the three-proofing paint material flows through the feeding part, the storage part and the discharging part in sequence from the feeding port. The discharging part is in the shape of a circular truncated cone with gradually decreasing cross section, and the discharging port 132 is arranged at the end of the discharging part with smaller cross section, which can effectively avoid the problem of incomplete discharge of the three-proofing paint, so that the three-proofing paint can quickly flow into the conveying pipe, and at the same time, the reverse suction of the three-proofing paint liquid can be prevented.

[0064] Preferably, the capacity of the second storage barrel 13 is 200-500 ml.

[0065] The amount of the suction solution needs to ensure good transmission and good spraying effect, so there is a minimum suction amount. The three-proofing paint liquid in a large-capacity container cannot be sucked and transmitted, and the three-proofing paint liquid in a small-capacity container can be relatively easily sucked and transmitted. In the embodiment, the capacity of the second storage barrel 13 is 500 ml, which is arranged on the rack near the spray head 14. Only a small amount of three-proofing paint liquid is needed for transmission, and the second storage barrel 13 can be easily disassembled and cleaned, the liquid can be easily refilled, and the second storage barrel 13 has higher practicability. Only the small-capacity second storage barrel 13 and the short conveying pipe need to be cleaned, which greatly reduces the workload of cleaning and reduces resource waste.

[0066] Preferably, the air inlet 131 is arranged on the sealing cover 135.

[0067] The air inlet 131 is arranged on the sealing cover 135, which not only realizes the compact design of the second storage barrel 13, but also is conducive to controlling the flow direction of the gas and improving the working efficiency of the gas pressure on the three-proofing paint.

[0068] Preferably, the air inlet 131 is communicated with the air outlet 122 through an air duct with a tube diameter of 3-5 mm.

[0069] The diameter of the air duct has an important influence on the pipeline resistance of air pressure delivery. In the embodiment, the air inlet 131 is communicated with the air outlet 122 on the storage barrel through an air duct with a diameter of 5 mm to deliver air pressure to the second storage barrel 13, so as to realize good air pressure delivery efficiency and stability. The air inlet 131 is arranged on the sealing cover 135 to realize compact design of the second storage barrel 13. The sealing cover 135 is internally provided with a rubber ring, and the sealing cover 135 and the feeding port are both provided with threads. The threads of the feeding port are connected with the threads of the sealing cover, and the rubber ring is matched to realize sealing of the second storage barrel 13, so that the input air pressure can work on the three-proofing paint in the second storage barrel 13 to push the liquid three-proofing paint to the spray head 14, promote effective use of the three-proofing paint in the tank, and reduce residual three-proofing paint.

[0070] Embodiment 3

[0071] As shown in Figure 1 and Figure 2 The embodiment provides a three-proofing paint feeding assembly, which comprises a first storage barrel 12, a pressure mechanism and a spray head 14, the first storage barrel 12 is provided with an air inlet 121 and an air outlet 122; the air inlet 121 is communicated with the air pressure mechanism; a second storage barrel 13 is arranged between the first storage barrel 12 and the spray head 14; the capacity of the second storage barrel 13 is 200-500 ml; the second storage barrel 13 is provided with a feeding port, a discharging port 132 and an air inlet 131; the discharging port 132 is communicated with the spray head 14; the air inlet 131 is communicated with the air outlet 122; and the feeding port is provided with a sealing cover 135.

[0072] Specifically, the amount of the suction solution needs to ensure that it can be transported and have good spraying effect, so there is a minimum filling amount. The small capacity container cannot be sucked and transported because the liquid in the large capacity container is too small, and the small capacity container is relatively easy to be sucked and transported. The application adds a 200-500ml second discharge barrel 13 between the first discharge barrel 12 and the spray head 14. Compared with the original minimum 200ml filling amount required for loading by using the large capacity first storage barrel 12, the application directly loads the second storage barrel 13 between the spray head 14 and the first storage barrel 12, and only needs a minimum of 20ml of three-proof paint filling amount to be transported. The pressure mechanism includes a booster pump 11, which connects the air outlet 122 of the first storage barrel 12 with the air inlet 131 of the second storage barrel 13, so that the first storage barrel 12 can deliver air pressure to the second storage barrel 13. When the three-proof paint spraying operation is performed, the sealing cover 135 is opened, and the three-proof paint is filled into the second storage barrel 13 through the inlet. Then the sealing cover 135 is closed, the booster pump 11 is started, and the air pressure value is set to 0.5MPA. After the air pressure enters the first storage barrel 12, it enters the air inlet 131 of the second storage barrel 13 from the air outlet 122, pushes the three-proof paint in the second storage barrel 13 to the spray head 14 through the discharge port 132, and sprays the circuit board. One of the important reasons for the serious waste of three-proof paint is that the distance between the first storage barrel 12 and the spray head 14 is too far, resulting in too much three-proof paint remaining in the long pipeline after spraying, which needs to be cleaned. By adding the second storage barrel 13 between the first storage barrel 12 and the spray head 14, the distance between the three-proof paint and the spray head 14 is reduced, the filling amount of the three-proof paint is reduced, and too much three-proof paint material is avoided. The material can be filled directly into the second storage barrel 13, and it is convenient to disassemble and clean. Only the small capacity second storage barrel 13 and the short conveying pipe need to be cleaned, which greatly saves cleaning materials and materials, achieves the purpose of reducing cost and increasing benefit.

[0073] Preferably, the discharge port 132 and the spray head 14 are connected by a conveying pipe with a length of 10-50cm.

[0074] The length of the connection between the discharge port 132 and the spray head 14 needs to be within an appropriate range. Too long a distance is not conducive to cleaning, and too short a distance can adversely affect the operation of the spray head 14. The conveying pipe in the embodiment is 20cm long, which can make the three-proof paint flow smoothly into the spray head 14 and reduce the cleaning length of the conveying pipe, saving the amount of three-proof paint and cleaning materials.

[0075] Preferably, the diameter of the pipe opening of the conveying pipe is 3-6mm.

[0076] Specifically, the diameter of the conveying pipe is very important to the spraying effect of the three-proof paint. If a large spraying force is required, a conveying pipe with a larger diameter is needed. If soft spraying is required, a conveying pipe with a smaller diameter should be selected. The embodiment uses a 4mm diameter conveying pipe, which has good spraying effect on the circuit board.

[0077] Preferably, it further comprises a liquid level sensor 134 and an alarm; the liquid level sensor 134 is arranged at the bottom of the second storage barrel 13; the liquid level sensor 134 is electrically connected with the alarm.

[0078] The liquid level sensor 134 arranged at the bottom of the second storage barrel 13 is beneficial to monitor the liquid level in the second storage barrel 13 in real time. When the liquid level in the second storage barrel 13 is too low, the photoelectric switch on the liquid level sensor 134 is closed, triggering the alarm to sound an alarm to prompt that the liquid level is too low, preventing the liquid level of the three-proof paint from being too low. The liquid level of the three-proof paint being too low is not ideal for the spraying effect on the circuit board and adversely affects the quality of the circuit board. When the liquid level is in a safe position, the photoelectric switch is in an open state, and the alarm is in a closed state.

[0079] Preferably, it further comprises a rack; the second storage barrel 13 is detachably connected with the rack through a connecting piece.

[0080] The detachable connection of the second storage barrel 13 with the rack enables the second storage barrel 13 to be removed and cleaned at any time, reducing the cleaning time of the equipment and saving labor cost.

[0081] Preferably, the connecting piece comprises at least one clamp 133; the clamp 133 is connected with the rack; a clamp ring is arranged on the clamp 133; the second storage barrel 13 is arranged in the middle of the clamp ring; a tensioning piece is arranged on the clamp ring.

[0082] Specifically, two stainless steel clamps 133 are arranged on the rack, and the two stainless steel clamps 133 are fixed on the rack near the spray head 14 by screws. The clamp ring is adjusted in tightness by the tensioning piece, which is a screwable tensioning screw. The second storage barrel 13 is connected with the rack by the two stainless steel clamps 133. The first clamp ring is 20 mm below the top edge of the second storage barrel 13, and the second clamp ring is 60 mm above the bottom edge of the second storage barrel 13, achieving good fixing effect and facilitating removal and cleaning at any time.

[0083] The connecting piece is used to detachably connect the second storage barrel 13 with the rack, and its specific structure can also refer to other structures in the prior art, such as bolt connection and clamping sleeve connection.

[0084] Preferably, the second storage barrel 13 comprises, from top to bottom, a feeding part, a storage part and a discharging part; the feeding part is in communication with the feeding port; the feeding part is in communication with the storage part; the discharging part is in the shape of a circular truncated cone with a gradually decreasing cross section; one end of the discharging part with a larger cross section is in communication with the storage part, and the discharging port 132 is arranged at the other end of the discharging part with a smaller cross section.

[0085] Specifically, the three-proofing paint material flows through the feeding part, the storage part and the discharging part in sequence from the feeding port, the discharging part is in the shape of a circular truncated cone with a gradually decreasing cross section, and the discharging port 132 is arranged at one end of the discharging part with a smaller cross section, so that the problem of incomplete discharge of the three-proofing paint can be effectively avoided, the three-proofing paint can flow into the conveying pipe quickly, and the reverse suction of the three-proofing paint liquid can be prevented.

[0086] Preferably, the capacity of the second storage barrel 13 is 200-500 ml.

[0087] The amount of the solution to be sucked needs to ensure good transmission and good spraying effect, so there is a minimum suction amount. The three-proofing paint liquid in a large-capacity container cannot be sucked and transmitted because of the small amount, and the three-proofing paint liquid in a small-capacity container can be relatively easily sucked and transmitted. The capacity of the second storage barrel 13 is 300 ml, and the second storage barrel 13 is arranged on the rack near the spray head 14, so that the liquid can be conveniently filled. By reducing the capacity of the storage barrel and the length of the conveying pipe, the minimum filling amount of the three-proofing paint is reduced from the original minimum filling amount of 200 ml to 20 ml, the amount of waste is greatly reduced, the use amount of the three-proofing paint is greatly saved, the equipment is convenient to disassemble and clean, only the small-capacity second storage barrel 13 and the short conveying pipe need to be cleaned, the workload of cleaning is greatly reduced, the cleaning time of the equipment is shortened from 1 hour to 15 minutes, the labor cost is greatly saved, and the purpose of significant cost reduction and efficiency increase is achieved. The second storage barrel 13 is in the shape of a cylinder and is made of transparent acrylic material, so that the remaining amount and the flow speed of the three-proofing paint can be directly observed, the three-proofing paint in the second storage barrel 13 can be conveniently filled and visually observed, and the second storage barrel 13 has high practicability.

[0088] Preferably, the air inlet 131 is arranged on the sealing cover 135.

[0089] The air inlet 131 is arranged on the sealing cover 135, so that the second storage barrel 13 can be designed to be compact, the flow direction of the gas can be controlled, and the work efficiency of the gas pressure on the three-proofing paint can be improved.

[0090] Preferably, the air inlet 131 is communicated with the air outlet 122 through a gas guide pipe with a pipe opening diameter of 3-5 mm.

[0091] The diameter of the air guide pipe has an important influence on the pipeline resistance of air pressure delivery. The air inlet 131 is connected to the air outlet 122 on the storage barrel through a 4mm diameter air guide pipe to deliver air pressure to the second storage barrel 13, so as to realize good air pressure delivery efficiency and stability. The air inlet 131 is arranged on the sealing cover 135 to realize compact design of the second storage barrel 13. The sealing cover 135 is internally provided with a rubber ring, and the sealing cover 135 and the feeding port are both provided with threads. The threads of the feeding port are connected with the threads of the sealing cover, and the rubber ring is matched to realize sealing of the second storage barrel 13, so that the input air pressure can work on the liquid three-proof paint in the second storage barrel 13 to push the liquid three-proof paint to the spray head 14, promote effective use of the three-proof paint in the tank, and reduce three-proof paint residue.

[0092] Embodiment 4

[0093] As shown in Figure 1 and Figure 2 , the embodiment provides a three-proof paint spraying device, which comprises the three-proof paint feeding assembly of embodiment 3.

[0094] The three-proof paint spraying device only needs to add the second storage barrel 13 between the first storage barrel 12 and the spray head 14, and make the air inlet 131 of the second storage barrel 13 communicate with the air outlet 122 of the first storage barrel 12, and the discharge port 132 of the second storage barrel 13 communicate with the spray head 14. The capacity of the first storage barrel 12 is 5L, and the capacity of the second storage barrel 13 is 300ml. Small-dose three-proof paint spraying work is carried out by the second storage barrel 13, and large-dose three-proof paint spraying work is carried out by the first storage barrel 12. Because the delivery pipe length between the second storage barrel 13 and the spray head 14 is only 20cm, which is much smaller than the communication distance between the first storage barrel 12 and the spray head 14, the area of the second storage barrel 13 and the delivery pipe to be cleaned after spraying is small. The minimum filling amount of three-proof paint is reduced from the original 200ml to 20ml, and the amount of waste is also greatly reduced. The use amount of three-proof paint is greatly saved. The equipment is easy to disassemble and clean. Only the small-capacity second storage barrel 13 and the short delivery pipe need to be cleaned, the cleaning workload is greatly reduced, the equipment cleaning time is shortened from 1 hour to 15 minutes, the labor cost is greatly saved, and the purpose of significant cost reduction and efficiency increase is realized.

[0095] It can be understood that the above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the patent scope of the present application; it should be pointed out that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and some modifications and improvements can be made, which belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. A tri-proof paint feeding assembly, characterized by, The first storage tank (12) is provided with an air inlet (121) and an air outlet (122); the air inlet (121) is communicated with the air pressure mechanism; the first storage tank (12) and the spray head (14) are provided with the second storage tank (13); the capacity of the second storage tank (13) is 200-500ml; the second storage tank (13) is provided with a feeding port, a discharging port (132) and an air suction port (131); the discharging port (132) is communicated with the spray head (14); the air suction port (131) is communicated with the air outlet (122); the feeding port is provided with a sealing cover (135).

2. The three-proofing paint loading assembly according to claim 1, wherein, The discharging port (132) and the spray head (14) are communicated through the conveying pipe with a length of 10-50cm.

3. The three-proofing paint loading assembly of claim 2, wherein, The pipe opening diameter of the conveying pipe is 3-6mm.

4. The three-proofing paint loading assembly of claim 1, wherein, Further comprising a liquid level sensor (134) and an alarm; the liquid level sensor (134) is arranged at the bottom of the second storage tank (13); the liquid level sensor (134) is electrically connected with the alarm.

5. The three-proofing paint loading assembly of claim 1, wherein, Further comprising a rack; the second storage tank (13) is detachably connected with the rack through a connecting piece.

6. The three-proofing paint loading assembly according to claim 5, wherein, The connecting piece comprises at least one clamp (133); the clamp (133) is connected with the rack; the clamp (133) is provided with a clamp ring; the second storage tank (13) is arranged in the middle of the clamp ring; the clamp ring is provided with a tensioning piece.

7. The three-proofing paint loading assembly of claim 1, wherein, The second storage tank (13) comprises a feeding part, a storage part and a discharging part from top to bottom; the feeding part is communicated with the feeding port; the feeding part is communicated with the storage part; The discharging part is in the shape of a circular truncated cone with gradually decreasing cross section; One end of the discharging part is connected with the storage part, and the other end of the discharging part is provided with the discharging port (132); the cross-sectional area of the end of the discharging part connected with the storage part is larger than that of the other end of the discharging part provided with the discharging port (132).

8. The three-proofing paint loading assembly of claim 1, wherein, The air suction port (131) is arranged on the sealing cover (135).

9. The three-proofing paint loading assembly of claim 1, wherein, The air suction port (131) is communicated with the air outlet (122) through the air guide pipe with a pipe opening diameter of 3-5mm.

10. A three-protective paint spraying device characterized by comprising: The three-proofing paint feeding assembly comprises the three-proofing paint feeding assembly according to any one of claims 1-9.

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