Gas-liquid mixing type cleaning device and wave soldering equipment

Abstract

The utility model discloses a gas-liquid mixing type cleaning device and wave soldering equipment, and the gas-liquid mixing type cleaning device comprises a first pipeline, a second pipeline, a third pipeline and a fourth pipeline, the second pipeline is arranged in parallel with the first pipeline, and two connecting parts of the first pipeline and the second pipeline are respectively communicated with the ventilation pipeline and the discharge pipeline; the air supply device communicates with the ventilation pipeline and is used for introducing air into the ventilation pipeline; the control valve is arranged on the ventilation pipeline and used for controlling the space between the ventilation pipeline and the air supply device; and the spray head is arranged at the tail end of the discharge pipeline and communicates with the discharge pipeline, and the spray head is used for being arranged corresponding to the scaling powder spray head. According to the gas-liquid mixed type cleaning device and the wave soldering equipment, under the condition that the cost is extremely low, the problem of spraying interruption caused by a traditional cleaning mode is solved, welding failures of PCB products are prevented, the time needed by cleaning and maintaining is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB production equipment, and more specifically, to a gas-liquid mixed cleaning device. In addition, the utility model also relates to a wave soldering device including the gas-liquid mixed cleaning device. Background Art

[0002] Now, printed circuit boards (PCB) and components are welded by wave soldering equipment. Wave soldering equipment is an automated flow operation mode. PCBs flow one by one on the assembly line without stopping in the middle. After four steps of flux spraying, preheating, wave soldering, and cooling, the soldering is completed. The flux spraying step uses a motor to drive the nozzle to move back and forth in a straight line. When the nozzle spraying is abnormal, the nozzle does not spray the flux normally, resulting in the failure of flux spraying. The PCB continues to flow to the following preheating, wave soldering, and cooling steps. Finally, it is found that the welding quality is poor during manual inspection. At this time, the equipment has produced a large number of defective PCB products. There are several ways to deal with defective products: 1. Scrap the product; 2. Manual rework. Due to the inconsistent manual operation techniques, it is difficult to ensure the quality of the solder joints; 3. Secondary wave soldering is easy to cause mechanical damage and thermal shock to the components of the PCB machine, leading to failure. Therefore, many electronic companies that produce PCBs can only arrange special personnel to patrol the production line in order to timely discover equipment function abnormalities and reduce losses.

[0003] In the SMT electronics industry, the integration of PCB products is getting higher and higher, and the cost is getting higher and higher. For example, the price of a single large server motherboard is close to $1,000. If the welding of PCB products fails due to the blockage of the flux nozzle or bubbles, they can only be scrapped (the quality requirements of the solder joints are extremely high, and secondary welding repairs are not accepted), and the losses caused will be huge.

[0004] In summary, how to avoid soldering failure of PCB products is a problem that needs to be solved urgently by technical personnel in this field. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a gas-liquid hybrid cleaning device, which solves the problem of spray interruption caused by traditional cleaning methods with extremely low additional costs, prevents welding failure of PCB products, shortens the time required for cleaning and maintenance, and improves production efficiency.

[0006] Another object of the utility model is to provide a wave soldering device comprising the above-mentioned gas-liquid mixed cleaning device.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A gas-liquid mixed cleaning device, comprising:

[0009] a first pipeline, wherein a cleaning liquid is stored in the first pipeline;

[0010] A second pipeline is arranged in parallel with the first pipeline, and two connecting parts of the first pipeline and the second pipeline are respectively connected to the ventilation pipeline and the drainage pipeline;

[0011] An air supply device, connected to the ventilation pipe, and used to introduce gas into the ventilation pipe;

[0012] A control valve, provided in the ventilation duct, the control valve is used to control the opening and closing of the pipeline between the ventilation duct and the air supply device;

[0013] A nozzle is arranged at the end of the drainage pipe and is connected to the drainage pipe. The nozzle is used to be arranged corresponding to the flux nozzle.

[0014] Preferably, the first pipeline includes an air supply pipe, a cleaning liquid storage tank and a liquid outlet pipe, the air supply pipe and the liquid outlet pipe are both connected to the cleaning liquid storage tank, the air supply pipe, the ventilation pipe and the second pipeline are connected in a three-way connection, and the liquid outlet pipe, the second pipeline and the discharge pipe are connected in a three-way connection.

[0015] Preferably, the liquid outlet pipe extends into the cleaning liquid storage tank and is inserted into the cleaning liquid, the connection portion between the air supply pipe and the cleaning liquid storage tank is arranged at the upper end portion of the cleaning liquid storage tank, and the connection portion between the air supply pipe and the cleaning liquid storage tank is arranged above the cleaning liquid.

[0016] Preferably, a first speed regulating valve is provided on the second pipeline, and a second speed regulating valve is provided on the liquid outlet pipe, the first speed regulating valve is used to regulate the air flow speed in the second pipeline, and the second speed regulating valve is used to regulate the flow rate of the cleaning liquid in the liquid outlet pipe.

[0017] Preferably, a three-way valve is provided at the connection between the air supply pipe, the ventilation pipe and the second pipeline, and the three-way valve is also provided at the connection between the liquid outlet pipe, the second pipeline and the discharge pipeline.

[0018] Preferably, a one-way valve is further provided on the liquid outlet pipe, and the one-way valve is provided between the second speed regulating valve and the second pipeline, and the one-way valve is used to prevent the cleaning liquid from flowing back.

[0019] Preferably, the control valve is provided with a control switch, and the control switch is used to regulate the flow rate of gas introduced into the ventilation duct by the gas supply device.

[0020] A wave soldering equipment comprises a gas-liquid mixed cleaning device, wherein the gas-liquid mixed cleaning device is any one of the gas-liquid mixed cleaning devices described above.

[0021] The utility model provides a gas-liquid mixed cleaning device, in which a first pipeline and a second pipeline are arranged in parallel, two connecting parts of the first pipeline and the second pipeline are respectively connected to a ventilation pipeline and a discharge pipeline, the ventilation pipeline is connected to an air supply device, and the discharge pipeline is connected to a nozzle, a control valve can control the air supply device to pass gas from the ventilation pipeline into the first pipeline and the second pipeline, the first pipeline is filled with cleaning liquid, the gas passed into the first pipeline can squeeze the cleaning liquid into the discharge pipeline, the gas passed into the second pipeline can also pass into the discharge pipeline, and finally the nozzle sprays the gas-liquid mixture evenly on the surface of the flux nozzle to wet the surface flux crystals, and the high-pressure gas blows the flux adsorbed on the surface, the structure is simple and the cleaning effect is better, the reliability is high, the cost is low, the problem of spray interruption caused by the traditional cleaning method is solved, the welding failure of PCB products is prevented, the time required for cleaning and maintenance is shortened, and the production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the structure of the gas-liquid mixed cleaning device provided by the utility model;

[0024] Figure 2 This is a structural schematic diagram of the control valve provided by the utility model.

[0025] Figure 1 and Figure 2 , the reference numerals include:

[0026] 1-first pipeline; 1-1-air supply pipe; 1-2-cleaning liquid storage tank; 1-3-liquid outlet pipe; 2-second pipeline; 3-ventilation pipe; 4-drainage pipe; 5-control valve; 5-1-control switch; 6-nozzle; 7-flux nozzle; 8-first speed regulating valve; 9-second speed regulating valve; 10-check valve; 11-three-way valve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] The core of the utility model is to provide a gas-liquid hybrid cleaning device, which solves the problem of spray interruption caused by traditional cleaning methods, shortens the time required for cleaning and maintenance, and improves production efficiency.

[0029] Another core of the utility model is to provide a wave soldering equipment including the above-mentioned gas-liquid mixed cleaning device.

[0030] The present application provides a gas-liquid hybrid cleaning device, comprising: a first pipeline 1, a second pipeline 2, a gas supply device, a control valve 5 and a nozzle 6;

[0031] Wherein, the first pipeline 1 contains cleaning liquid;

[0032] The second pipeline 2 is arranged in parallel with the first pipeline 1, and two connecting parts of the first pipeline 1 and the second pipeline 2 are respectively connected with the ventilation pipeline 3 and the excretion pipeline 4;

[0033] The gas supply device is connected to the ventilation pipe 3, and the gas supply device is used to introduce gas into the ventilation pipe 3;

[0034] The control valve 5 is arranged on the ventilation pipe 3, and the control valve 5 is used to control the opening and closing of the pipeline between the ventilation pipe 3 and the air supply device;

[0035] The nozzle 6 is disposed at the end of the drain pipe 4 and is connected to the drain pipe 4 . The nozzle 6 is used to be disposed corresponding to the flux nozzle 7 .

[0036] For details, please refer to the attached Figure 1The air supply device can pass high-pressure gas into the ventilation pipe 3, and the high-pressure gas can pass into the first pipeline 1 and the second pipeline 2. The high-pressure gas in the first pipeline 1 can squeeze the cleaning liquid and discharge it into the discharge pipe 4. No other items are set in the second pipeline 2. The high-pressure gas in the ventilation pipe 3 directly passes into the second pipeline 2 and finally passes into the discharge pipe 4, so that the discharge pipe 4 is filled with a gas-liquid mixture. The gas-liquid mixture is sprayed out by the nozzle 6 and evenly sprayed onto the surface of the flux nozzle 7. The cleaning liquid can soak the flux crystals on the surface, and the high-pressure gas can blow away the soaked flux crystals adsorbed on the surface of the flux nozzle 7. The cleaning device has a simple structure, high reliability, good cleaning effect and high cleaning efficiency, and low cost, thereby solving the problem of spray interruption caused by traditional cleaning methods and preventing welding failure of PCB products; shortening the cleaning and maintenance time, improving production efficiency, and further improving the intelligence of wave soldering equipment.

[0037] On the basis of the above embodiment, the first pipeline 1 includes an air supply pipe 1-1, a cleaning liquid storage tank 1-2 and a liquid outlet pipe 1-3. The air supply pipe 1-1 and the liquid outlet pipe 1-3 are both connected to the cleaning liquid storage tank 1-2. The air supply pipe 1-1, the ventilation pipe 3 and the second pipeline 2 are connected in a three-way manner. The liquid outlet pipe 1-3, the second pipeline 2 and the excretion pipe 4 are connected in a three-way manner.

[0038] Specifically, the first pipeline 1 can store a sufficient amount of cleaning liquid in the cleaning liquid storage tank 1-2 through the setting of the cleaning liquid storage tank 1-2, so as to ensure sufficient cleaning liquid during the cleaning process. High-pressure gas is introduced into the cleaning liquid storage tank 1-2 through the air supply pipe 1-1, so that the cleaning liquid can be pressed into the liquid outlet pipe 1-3. It should be noted that the air supply pipe 1-1 and the liquid outlet pipe 1-3 are connected to the cleaning liquid storage tank 1-2 by a threaded connection. The cleaning liquid storage tank 1-2 should be sealed so that when gas is introduced into the cleaning liquid storage tank 1-2, the cleaning liquid can be squeezed out. When the cleaning liquid is insufficient, the liquid outlet pipe 1-3 can be removed and the cleaning liquid can be replenished, which is convenient to operate.

[0039] On the basis of the above embodiment, the liquid outlet pipe 1-3 extends into the cleaning liquid storage tank 1-2 and is inserted into the cleaning liquid, the connecting part of the air supply pipe 1-1 and the cleaning liquid storage tank 1-2 is arranged at the upper end of the cleaning liquid storage tank 1-2, and the connecting part of the air supply pipe 1-1 and the cleaning liquid storage tank 1-2 is arranged above the cleaning liquid.

[0040] Specifically, the section of the liquid outlet pipe 1-3 extending into the cleaning liquid storage tank 1-2 is preferably a hard pipe to ensure its stable position, and the part of the hard pipe inserted into the cleaning liquid storage tank 1-2 should be as close to the bottom of the cleaning liquid storage tank 1-2 as possible so that the cleaning liquid in the cleaning liquid storage tank 1-2 can be fully utilized. The connection between the air supply pipe 1-1 and the cleaning liquid storage tank 1-2 should also be arranged at the upper end of the cleaning liquid storage tank 1-2. After the high-pressure gas is introduced, the gas eventually reaches the top of the cleaning liquid storage tank 1-2 and squeezes the cleaning liquid, which can speed up the drainage progress.

[0041] Based on the above embodiment, a first speed regulating valve 8 is provided on the second pipeline 2, and a second speed regulating valve 9 is provided on the liquid outlet pipe 1-3. The first speed regulating valve 8 is used to regulate the air flow speed in the second pipeline 2, and the second speed regulating valve 9 is used to regulate the flow rate of the cleaning liquid in the liquid outlet pipe 1-3.

[0042] Specifically, a speed regulating valve is respectively provided on the second pipeline 2 and the liquid outlet pipe 1-3, and the flow rate of the cleaning liquid and the flow rate of the gas are controlled by the first speed regulating valve 8 and the second speed regulating valve 9, so as to control the gas-liquid mixing ratio of the gas-liquid mixture and adjust the gas-liquid mixture to the optimal cleaning ratio.

[0043] On the basis of the above embodiment, a three-way valve 11 is provided at the connection between the air supply pipe 1 - 1 , the ventilation pipe 3 and the second pipeline 2 , and a three-way valve 11 is also provided at the connection between the liquid outlet pipe 1 - 3 , the second pipeline 2 and the discharge pipe 4 .

[0044] Specifically, the air supply device introduces high-pressure gas into the ventilation pipe 3, and therefore a three-way valve 11 is provided at the connection between the air supply pipe 1-1, the ventilation pipe 3 and the second pipeline 2, and at the connection between the liquid outlet pipe 1-3, the second pipeline 2 and the discharge pipe 4 to ensure the connectivity of the connection, thereby ensuring the structural stability. It should be noted that the three-way valve 11 at the connection between the liquid outlet pipe 1-3, the second pipeline 2 and the discharge pipe 4 has a one-way port connecting to the second pipeline 2 to prevent liquid from flowing back into the second pipeline 2.

[0045] On the basis of the above embodiment, a one-way valve 10 is further provided on the liquid outlet pipe 1 - 3 . The one-way valve 10 is provided between the second speed regulating valve 9 and the second pipeline 2 . The one-way valve 10 is used to prevent the backflow of the cleaning liquid.

[0046] Specifically, the one-way valve 10 arranged on the liquid outlet pipe 1-3 can ensure that the cleaning liquid flows from the cleaning liquid storage tank 1-2 into the liquid outlet pipe 1-3 and the discharge pipe 4, and is finally sprayed from the nozzle 6 to the surface of the flux nozzle 7, thereby preventing the cleaning liquid from flowing back into the cleaning liquid storage tank 1-2 and avoiding contamination of the cleaning liquid in the cleaning liquid storage tank 1-2.

[0047] On the basis of the above-mentioned embodiment, a control switch 5 - 1 is provided on the control valve 5 , and the control switch 5 - 1 is used to adjust the flow rate of the gas introduced into the ventilation pipe 3 by the gas supply device.

[0048] For details, please refer to the attached Figure 2 The control switch 5-1 is a rotary switch, which adjusts the flow rate of gas introduced into the ventilation pipe 3 by the gas supply device according to different gear positions. By using the control switch 5-1 in conjunction with the first speed regulating valve 8 and the second speed regulating valve 9, the composition and dosage of the gas-liquid mixture can be adjusted to the optimal level to improve the cleaning effect of the flux nozzle 7.

[0049] In addition to the above-mentioned gas-liquid hybrid cleaning device, the utility model also provides a wave soldering equipment including the gas-liquid hybrid cleaning device disclosed in the above-mentioned embodiment. For the structures of other parts of the wave soldering equipment, please refer to the prior art and will not be described in detail herein.

[0050] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0051] The above is a detailed introduction to a gas-liquid hybrid cleaning device and wave soldering equipment provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A gas-liquid mixed cleaning device, characterized in that: include: A first pipeline (1), wherein a cleaning liquid is stored in the first pipeline (1); A second pipeline (2) is arranged in parallel with the first pipeline (1), and two connecting parts between the first pipeline (1) and the second pipeline (2) are respectively connected to the ventilation pipeline (3) and the drainage pipeline (4); an air supply device, connected to the ventilation pipe (3), the air supply device being used to introduce gas into the ventilation pipe (3); A control valve (5) is provided on the ventilation pipeline (3), and the control valve (5) is used to control the opening and closing of the pipeline between the ventilation pipeline (3) and the air supply device; A nozzle (6) is arranged at the end of the drainage pipe (4) and is in communication with the drainage pipe (4); the nozzle (6) is used to be arranged corresponding to the soldering flux nozzle (7).

2. The gas-liquid hybrid cleaning device according to claim 1, characterized in that: The first pipeline (1) comprises an air supply pipe (1-1), a cleaning liquid storage tank (1-2) and a liquid outlet pipe (1-3); the air supply pipe (1-1) and the liquid outlet pipe (1-3) are both connected to the cleaning liquid storage tank (1-2); the air supply pipe (1-1), the ventilation pipe (3) and the second pipeline (2) are connected in a three-way manner; and the liquid outlet pipe (1-3), the second pipeline (2) and the discharge pipe (4) are connected in a three-way manner.

3. The gas-liquid hybrid cleaning device according to claim 2, characterized in that: The liquid outlet pipe (1-3) extends into the cleaning liquid storage tank (1-2) and is inserted into the cleaning liquid, the connection portion between the air supply pipe (1-1) and the cleaning liquid storage tank (1-2) is arranged at the upper end portion of the cleaning liquid storage tank (1-2), and the connection portion between the air supply pipe (1-1) and the cleaning liquid storage tank (1-2) is arranged above the cleaning liquid.

4. The gas-liquid mixed cleaning device according to claim 3, characterized in that: The second pipeline (2) is provided with a first speed regulating valve (8), and the liquid outlet pipe (1-3) is provided with a second speed regulating valve (9); the first speed regulating valve (8) is used to regulate the air flow speed in the second pipeline (2), and the second speed regulating valve (9) is used to regulate the flow speed of the cleaning liquid in the liquid outlet pipe (1-3).

5. The gas-liquid mixed cleaning device according to claim 4, characterized in that: A three-way valve (11) is provided at the connection between the air supply pipe (1-1), the ventilation pipe (3) and the second pipeline (2); and a three-way valve (11) is also provided at the connection between the liquid outlet pipe (1-3), the second pipeline (2) and the drainage pipe (4).

6. The gas-liquid mixed cleaning device according to claim 5, characterized in that: The liquid outlet pipe (1-3) is also provided with a one-way valve (10), the one-way valve (10) being arranged between the second speed regulating valve (9) and the second pipeline (2), the one-way valve (10) being used to prevent the cleaning liquid from flowing back.

7. The gas-liquid mixed cleaning device according to any one of claims 1 to 6, characterized in that: The control valve (5) is provided with a control switch (5-1), and the control switch (5-1) is used to regulate the flow rate of gas introduced into the ventilation pipe (3) by the gas supply device.

8. A wave soldering equipment, comprising a gas-liquid mixed cleaning device, characterized in that: The gas-liquid mixing cleaning device is the gas-liquid mixing cleaning device as described in any one of claims 1 to 7.

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