CN223833622U - Formic acid supply system and vacuum reflow soldering furnace thereof - Google Patents
Formic acid supply system and vacuum reflow soldering furnace thereofInfo
- Publication number
- CN223833622U CN223833622U CN202520150079.XU CN202520150079U CN223833622U CN 223833622 U CN223833622 U CN 223833622U CN 202520150079 U CN202520150079 U CN 202520150079U CN 223833622 U CN223833622 U CN 223833622U
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- formic acid
- tower
- acid
- valve
- supply system
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Abstract
The utility model discloses a formic acid supply system and a vacuum reflow soldering furnace thereof, comprising a formic acid conveying pipeline, a gas conveying pipeline and a vacuum reflow soldering furnace, wherein the formic acid conveying pipeline comprises an acid storage bottle and a formic acid tower which are communicated sequentially through pipelines, formic acid stored in the acid storage bottle can be conveyed into the formic acid tower through a pump arranged on the pipeline, the gas conveying pipeline comprises a nitrogen supply component, a pressure regulating valve and a first manual stop valve which are communicated sequentially, the nitrogen supply component is communicated with the formic acid tower through the pipeline, the formic acid tower is communicated with a furnace body cavity and can be filled with formic acid gas, at least one formic acid tower is arranged, each formic acid tower is correspondingly communicated with one furnace body cavity, and each formic acid tower is respectively communicated with the same acid washing bottle. The acid washing bottle and the acid storage bottle are placed in the explosion-proof box, and the explosion-proof box can prevent formic acid from leaking and splashing caused by broken acid washing bottles and acid storage bottles or damage of pipelines and the like.
Description
Technical Field
The utility model belongs to the technical field of vacuum reflow ovens, and particularly relates to a formic acid supply system and a vacuum reflow oven thereof.
Background
Formic acid is a colorless liquid of the formula HCOOH, a common organic acid, with a strong pungent odor, and is commonly used as a solvent, preservative, reducing agent, and catalyst in chemical reactions.
Meanwhile, formic acid plays a vital role in the vacuum reflow soldering technology of electronic products, and can effectively remove bubbles and gas generated in soldering and ensure the quality of welding spots. Meanwhile, the high boiling point characteristic of the solder joint ensures that the solder joint is not easy to flow at high temperature, thereby preventing the solder joint from collision and short circuit and improving the stability and reliability of the electronic product. The formic acid can also prevent components from being oxidized and corroded, and prolong the service life of the components.
Formic acid is an acidic substance, and when using formic acid, safety regulations should be strictly adhered to, and appropriate protective equipment should be worn to avoid direct contact with skin and eyes, so as to prevent burn and poisoning. The utility model reduces the chance of contacting formic acid by manual operation and prevents damage caused by leakage of formic acid. Meanwhile, the device can intensively supply and distribute a plurality of reflow soldering furnace body chambers, and can also be expanded to intensively supply and distribute a plurality of reflow soldering furnace devices.
Disclosure of utility model
Aiming at the problems in the prior art, the utility model provides a formic acid supply system and a vacuum reflow oven thereof, wherein the vacuum reflow oven comprises a formic acid conveying pipeline and a gas conveying pipeline, an acid washing bottle and an acid storage bottle are placed in an explosion-proof box, and the explosion-proof box can prevent formic acid from leaking and splashing caused by the breakage of the acid washing bottle and the acid storage bottle or the damage of the pipeline and the like.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a formic acid supply system comprising:
The formic acid conveying pipeline comprises an acid storage bottle and a formic acid tower which are sequentially communicated through pipelines, and formic acid stored in the acid storage bottle can be conveyed into the formic acid tower through a pump arranged on the pipeline;
The gas conveying pipeline comprises a nitrogen supply assembly, a pressure regulating valve and a first manual stop valve which are sequentially communicated, wherein the nitrogen supply assembly is communicated to the formic acid tower through a pipeline, and the formic acid tower is communicated with the furnace body chamber and can be used for introducing formic acid gas into the furnace body chamber;
The number of the formic acid towers is at least one, each formic acid tower is correspondingly communicated with one furnace body cavity, and each formic acid tower is respectively communicated to the same acid washing bottle.
Further, the pump, the acid washing bottle and the acid storage bottle are all arranged in an explosion-proof box, a third liquid level sensor is arranged on the side face of the explosion-proof box, and the third liquid level sensor is used for monitoring the liquid level of the acid storage bottle.
Further, the gas conveying pipeline further comprises a second manual stop valve, the second manual stop valve is arranged corresponding to each formic acid tower, and the second manual stop valve is arranged at the downstream of the pressure regulating valve.
Further, a first electromagnetic valve, a flowmeter and a third electromagnetic valve are further arranged on a pipeline for communicating the nitrogen supply assembly and the formic acid tower, the first electromagnetic valve and the third electromagnetic valve are respectively installed on two sides of the flowmeter, and the first electromagnetic valve is located at the downstream of the second manual stop valve.
Further, a second electromagnetic valve is arranged between the formic acid tower and the furnace body chamber.
Further, a fourth electromagnetic valve is respectively arranged between each formic acid tower and each acid washing bottle.
Further, a third manual stop valve, a fifth electromagnetic valve and a check valve are arranged between the formic acid tower and the acid storage bottle, the check valve is communicated with the acid storage bottle, and the third manual stop valve is arranged between the fifth electromagnetic valve and the check valve.
Further, the acid storage bottle is provided with a one-way filter, and the one-way filter is communicated with the atmosphere.
Further, a first liquid level sensor and a second liquid level sensor are arranged on the side face of the formic acid tower, and the first liquid level sensor is located above the second liquid level sensor.
In addition, the utility model also claims a vacuum reflow oven provided with a formic acid supply system as set forth in any one of the above.
Compared with the prior art, the beneficial effect of this scheme is:
Formic acid is an acidic substance that can be easily burned and poisoned by direct contact with the skin and eyes when formic acid is used. The utility model provides a formic acid supply system and a vacuum reflow oven thereof, which comprises a formic acid conveying pipeline and a gas conveying pipeline, wherein an acid washing bottle and an acid storage bottle are placed in an explosion-proof box, and the explosion-proof box can prevent formic acid from leaking and splashing caused by the breakage of the acid washing bottle and the acid storage bottle or the damage of the pipeline and the like;
The formic acid tower and the furnace body chamber are correspondingly provided with a plurality of nitrogen gas serving as a carrier, the formic acid tower is used for filling the formic acid tower, formic acid liquid is volatilized into gas and released into the furnace body chamber for process operation, and the nitrogen gas supply assembly can simultaneously intensively supply and distribute a plurality of furnace body chambers and can also be expanded to intensively supply and distribute a plurality of reflow soldering furnace devices.
Drawings
FIG. 1 is a schematic diagram of the present formic acid supply system;
FIG. 2 is a schematic diagram of an explosion proof box structure;
FIG. 3 is a cross-sectional view of a formic acid column;
Fig. 4 is a cross-sectional view A-A of fig. 3.
The reference numerals are as follows:
The acid storage tank 1, the acid storage bottle 11, the one-way filter 111, the pump 12, the acid washing bottle 13, the exhaust pipe 131, the third liquid level sensor 14, the first electromagnetic valve 15, the flowmeter 16, the third electromagnetic valve 17, the fourth electromagnetic valve 18, the formic acid tower 2, the pressure regulating valve 21, the first manual stop valve 22, the second manual stop valve 23, the third manual stop valve 24, the fifth electromagnetic valve 25, the check valve 26, the first liquid level sensor 27, the second liquid level sensor 28, the furnace body chamber 3, the second electromagnetic valve 31, the base 32, the glass tank 33, the upper cover 34, the explosion-proof baffle 35, the air inlet pipe 36, the air outlet pipe 37, the vent pipe 38 and the acid inlet pipe 39.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings.
A formic acid supply system, as shown in fig. 1, comprising:
The formic acid conveying pipeline comprises an acid storage bottle 11 and a formic acid tower 2 which are sequentially communicated through pipelines, and formic acid stored in the acid storage bottle 11 can be conveyed into the formic acid tower 2 through a pump 12 arranged on the pipeline;
The gas conveying pipeline comprises a nitrogen supply assembly, a pressure regulating valve 21 and a first manual stop valve 22 which are sequentially communicated, wherein the nitrogen supply assembly is communicated to the formic acid tower 2 through a pipeline, and the formic acid tower 2 is communicated with the furnace body chamber 3 and can be used for introducing formic acid gas into the furnace body chamber 3;
Wherein, the number of the formic acid towers 2 is at least one, each formic acid tower 2 is correspondingly communicated with one furnace body chamber 3, and each formic acid tower 2 is respectively communicated with the same acid washing bottle 13.
According to the embodiment provided by the utility model, the acid storage bottle 11 is a glass bottle for storing formic acid in a large capacity, the volume is calculated according to the demand of the formic acid in actual production, the using amount of the formic acid in a plurality of furnace body chambers 3 can be simultaneously met in a certain time, and the frequency of manually pouring the formic acid for replacement is reduced. After the formic acid of the existing formic acid supply system is used up, the formic acid is generally required to be manually added into the formic acid bottle, and the whole bottle can be replaced, so that the damage caused by leakage of the formic acid when the formic acid is poured is reduced. When the pump 12 pumps the formic acid into the formic acid tower 2, the air in the formic acid tower 2 and the volatile gas of the formic acid are gradually discharged, and at the moment, the mixed gas enters the acid washing glass bottle through the pipeline, and the acid washing bottle 13 is filled with neutralizing liquid, so that the mixed gas can be neutralized into harmless gas and then discharged.
In this embodiment, the nitrogen supply assembly may adopt an industrial gas cylinder to supply gas, the formic acid tower 2 and the furnace body chamber 3 are respectively provided with four corresponding components, the nitrogen supply assembly is communicated with a plurality of formic acid tower 2 branch pipelines through a main pipeline, nitrogen is used as a carrier to fill the formic acid tower 2, and formic acid liquid is volatilized into gas through the formic acid tower 2 and released into the furnace body chamber 3 for process operation. The formic acid tower 2 is a formic acid temporary storage container, as shown in fig. 3 and 4, the formic acid tower 2 comprises a base 32, a glass tank 33 is fixed on the upper portion of the base 32, an upper cover 34 is arranged on the upper portion of the glass tank 33 in a sealing manner, an explosion-proof baffle 35 is arranged around the glass tank 33 in a surrounding manner, and the explosion-proof baffle 35 is arranged on the base 32. The upper cover 34 is communicated with an air inlet pipe 36, the air inlet pipe 36 is communicated with a nitrogen supply assembly, the upper cover 34 is communicated with an air outlet pipe 37, the air outlet pipe 37 is communicated with the corresponding furnace body cavity 3, the upper cover 34 is communicated with an air outlet pipe 38, the air outlet pipe 38 is communicated with the acid washing bottle 13, the acid washing bottle 13 is communicated with the atmosphere through an air outlet pipe 131, the upper cover 34 is communicated with an acid inlet pipe 39, and the acid inlet pipe 39 is communicated with the acid storage bottle 11.
Each furnace body chamber 3 is correspondingly provided with a formic acid tower 2 so as to more conveniently control the required dosage of each furnace body chamber 3 during the process production. The pressure regulating valve 21 is used for regulating the nitrogen pressure to a proper pressure, so that the device or the connecting pipe is prevented from being damaged by punching caused by the excessive pressure. The first manual stop valve 22 is a nitrogen total valve, and the valve is in a normally open state when the equipment is used, if the equipment needs to be maintained integrally, the first manual stop valve 22 is closed, so that the use of other equipment is prevented from being influenced.
Further, the pump 12, the acid washing bottle 13 and the acid storage bottle 11 are all arranged in an explosion-proof box 1, as shown in fig. 2, a third liquid level sensor 14 is installed on the side surface of the explosion-proof box 1, and the third liquid level sensor 14 is used for monitoring the liquid level of the acid storage bottle 11.
The third liquid level sensor 14 is arranged at the side surface of the acid storage bottle 11, and the height is set according to actual conditions. The acid washing bottle 13 and the acid storage bottle 11 are glass bottles, the acid washing bottle 13 and the acid storage bottle 11 are placed in the explosion-proof box 1, the explosion-proof box 1 is used for protecting formic acid from leakage and splashing caused by the breakage of the acid washing bottle 13 and the acid storage bottle 11 or damage of pipelines and the like, and the explosion-proof box 1 is made of corrosion-resistant materials such as stainless steel, plastic products and the like. The pump 12 is also made of a material with good anti-corrosion performance and is installed inside the explosion-proof box 1, and the installation position of the pump 12 is determined according to the installation requirements of different types of pumps, and in the embodiment, the pump 12 is a peristaltic pump, so that the peristaltic pump is installed on the upper part of the inner wall of the explosion-proof box 1. The third liquid level sensor 14 is used for detecting the residual amount of formic acid in the acid storage bottle 11, and the replacement can be automatically prompted when the formic acid is lower than the set liquid level.
Further, the gas delivery pipeline further comprises a second manual stop valve 23, the second manual stop valve 23 is arranged on each formic acid tower 2 branch pipeline, the second manual stop valve 23 is arranged corresponding to each formic acid tower 2, and the second manual stop valve 23 is arranged at the downstream of the pressure regulating valve 21. The second manual stop valve 23 is a nitrogen branch valve, and when the equipment is used, the second manual stop valve 23 is in a normally open state, if the corresponding furnace body chamber 3 needs to be maintained, the second manual stop valve 23 is closed, so that the use of other furnace body chambers 3 is prevented from being influenced.
Further, a first electromagnetic valve 15, a flowmeter 16 and a third electromagnetic valve 17 are further arranged on a pipeline communicated with the formic acid tower 2, the first electromagnetic valve 15 and the third electromagnetic valve 17 are respectively arranged on two sides of the flowmeter 16, the first electromagnetic valve 15 is positioned at the downstream of the second manual stop valve 23, the flowmeter 16 is also called a Mass Flowmeter (MFC), and the flow meter 16 is a device for precisely and stably measuring and controlling the mass flow of fluid, and precisely controls the required consumption of each furnace body chamber 3 during process production through the flowmeter 16.
Further, a second electromagnetic valve 31 is arranged between the formic acid tower 2 and the furnace body chamber 3.
Further, a fourth electromagnetic valve 18 is arranged between each formic acid tower 2 and the acid washing bottle 13.
The first manual stop valve 22, the second manual stop valve 23, the flowmeter 16, the first electromagnetic valve 15 and the second electromagnetic valve 31 are arranged on the branch pipelines of each formic acid tower 2, and the first electromagnetic valve 15, the second electromagnetic valve 31 and the third electromagnetic valve 17 are opened simultaneously according to the corresponding product process processing requirements in the furnace body chamber 3, so that the supply of formic acid in the corresponding furnace body chamber 3 can be realized. The branch pipeline of the formic acid tower 2 corresponding to the first electromagnetic valve 15 plays a role of opening and closing nitrogen, and the first electromagnetic valve 15 is cut off when not in use because the flowmeter 16 (MFC) is a precise instrument, so that the damage caused by the overshoot of the nitrogen pressure or long-time compression can be prevented. The second electromagnetic valve 31 plays a role of opening and closing nitrogen, and can cut off the second electromagnetic valve 31 when not in use, so that formic acid in the formic acid tower 2 is prevented from entering the corresponding furnace body chamber 3 due to natural volatilization. The third electromagnetic valve 17 plays a role of opening and closing nitrogen, and can cut off the third electromagnetic valve 17 when not in use, so that formic acid in the formic acid tower 2 is prevented from entering the damage flowmeter 16 due to natural volatilization.
Further, a third manual stop valve 24, a fifth electromagnetic valve 25 and a check valve 26 are arranged between the formic acid tower 2 and the acid storage bottle 11, the check valve 26 is communicated with the acid storage bottle 11, and the third manual stop valve 24 is arranged between the fifth electromagnetic valve 25 and the check valve 26.
Further, a first liquid level sensor 27 and a second liquid level sensor 28 are installed on the side face of the formic acid tower 2, and the first liquid level sensor 27 is located above the second liquid level sensor 28. The first 27 and second 28 level sensors are mounted on a vent panel 35.
The fourth electromagnetic valve 18 and the fifth electromagnetic valve 25 are opened simultaneously when the formic acid liquid in a certain formic acid tower 2 is detected to be lower than the set liquid level (the second liquid level sensor 28), and the formic acid in the acid storage bottle 11 is pumped into the formic acid tower 2, and the fourth electromagnetic valve 18, the fifth electromagnetic valve 25 and the pump 12 are closed simultaneously when the first liquid level sensor 27 detects the liquid level, so that the formic acid tower 2 is in a full capacity state. When the nitrogen supply gas path is in an operating state, i.e. the first, second and third solenoid valves 15, 31, 17 are opened, the operation is disabled
The fourth and fifth solenoid valves 18 and 25 and the pump 12 prevent the formic acid gas from being excessively flushed into the furnace chamber 3.
Further, the acid storage bottle 11 is provided with a one-way filter 111, and the one-way filter 111 is communicated with the atmosphere. The one-way filter 111 is in communication with the atmosphere for preventing vacuum in the acid storage bottle 11 caused by the pump 12 when pumping formic acid.
In addition, the utility model also claims a vacuum reflow oven provided with a formic acid supply system as set forth in any one of the above.
It should finally be noted that in the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A formic acid supply system, comprising:
The formic acid conveying pipeline comprises an acid storage bottle and a formic acid tower which are sequentially communicated through pipelines, and formic acid stored in the acid storage bottle can be conveyed into the formic acid tower through a pump arranged on the pipeline;
The gas conveying pipeline comprises a nitrogen supply assembly, a pressure regulating valve and a first manual stop valve which are sequentially communicated, wherein the nitrogen supply assembly is communicated to the formic acid tower through a pipeline, and the formic acid tower is communicated with the furnace body chamber and can be used for introducing formic acid gas into the furnace body chamber;
The number of the formic acid towers is at least one, each formic acid tower is correspondingly communicated with one furnace body cavity, and each formic acid tower is respectively communicated to the same acid washing bottle.
2. A formic acid supply system as set forth in claim 1, wherein said pump, acid washing bottle and acid storage bottle are all disposed in an explosion proof tank, a third liquid level sensor is mounted on the side of said explosion proof tank, said third liquid level sensor is used for monitoring the liquid level of said acid storage bottle.
3. A formic acid supply system as defined by claim 2 wherein the gas delivery line further includes a second manual shut-off valve disposed for each formic acid tower, the second manual shut-off valve disposed downstream of the pressure regulating valve.
4. A formic acid supply system as set forth in claim 3, wherein a first electromagnetic valve, a flowmeter and a third electromagnetic valve are further provided on the pipeline connecting the nitrogen supply assembly and the formic acid tower, said first electromagnetic valve and said third electromagnetic valve are respectively installed on both sides of said flowmeter, said first electromagnetic valve is located at the downstream of said second manual stop valve.
5. A formic acid supply system as defined by any of claims 1-4 wherein a second solenoid valve is disposed between said formic acid column and the furnace chamber.
6. A formic acid supply system as defined by any one of claims 1-4 wherein a fourth solenoid valve is disposed between each of said formic acid tower and said acid wash tank.
7. A formic acid supply system as defined by claim 6 wherein a third manual shut-off valve, a fifth solenoid valve and a check valve are disposed between said formic acid tower and said acid storage bottle, said check valve being in communication with said acid storage bottle, said third manual shut-off valve being disposed between said fifth solenoid valve and said check valve.
8. A formic acid supply system as defined by claim 7 wherein said acid storage bottle has a one-way filter mounted thereon, said one-way filter being vented to atmosphere.
9. A formic acid supply system as defined by claim 8 wherein said formic acid column is laterally mounted with a first liquid level sensor and a second liquid level sensor, said first liquid level sensor being above said second liquid level sensor.
10. A vacuum reflow oven, wherein a formic acid supply system as set forth in any one of claims 1 to 9 is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520150079.XU CN223833622U (en) | 2025-01-22 | 2025-01-22 | Formic acid supply system and vacuum reflow soldering furnace thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520150079.XU CN223833622U (en) | 2025-01-22 | 2025-01-22 | Formic acid supply system and vacuum reflow soldering furnace thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223833622U true CN223833622U (en) | 2026-01-27 |
Family
ID=98511564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202520150079.XU Active CN223833622U (en) | 2025-01-22 | 2025-01-22 | Formic acid supply system and vacuum reflow soldering furnace thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223833622U (en) |
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2025
- 2025-01-22 CN CN202520150079.XU patent/CN223833622U/en active Active
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