Formic acid vacuum furnace vacuum filtration system and formic acid vacuum furnace

Abstract

The utility model relates to a formic acid vacuum furnace vacuum filtration system and formic acid vacuum furnace wherein the formic acid vacuum furnace vacuum filtration system comprises: a first filtration mechanism comprising a first tank body, a primary metal wire mesh arranged in the first tank body and a cooling pipe arranged in the first tank body; gas entering the first tank body is primarily filtered by a first-stage metal wire mesh, and is cooled by a cooling pipe; the second filtering mechanism is connected with the first filtering mechanism; the second filtering mechanism comprises a second tank body, a second-stage metal wire mesh arranged in the second tank body and a third-stage filter element arranged in the second tank body; the second tank body is communicated with the vacuum pump connecting pipe; and the gas is filtered again by the second-stage metal wire mesh and the third-stage filter element. According to the utility model, impurities in gas can be effectively filtered.

Description

Technical Field

[0001] The utility model relates to the technical field of formic acid vacuum furnaces, in particular to a formic acid vacuum furnace vacuum filtration system and a formic acid vacuum furnace. Background Art

[0002] Reflow soldering is an essential step in the electronics manufacturing process, and flux plays a vital role in this process. However, after soldering is completed, flux residue can become a thorny problem, affecting the performance and reliability of the circuit board.

[0003] At present, the commonly used flux filtering devices cannot fully extract and filter the excess residual flux through filtering and recycling. The excess flux can easily damage the machine, pollute the product, and increase the waste of man-hours.

[0004] Therefore, there is an urgent need to design a filtering device or system for effectively filtering the soldering flux. Utility Model Content

[0005] Aiming at the deficiencies of the prior art, the utility model discloses a soldering flux recovery device and a formic acid vacuum furnace.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A formic acid vacuum furnace vacuum filtration system, comprising:

[0008] The first filtering mechanism comprises a first tank body, a primary metal wire mesh disposed in the first tank body, and a cooling pipe disposed in the first tank body; the primary metal wire mesh performs preliminary filtering on the gas entering the first tank body, and the cooling pipe cools the gas;

[0009] The second filtering mechanism is connected to the first filtering mechanism; the second filtering mechanism includes a second tank body, a secondary metal wire mesh arranged in the second tank body, and a tertiary filter element arranged in the second tank body; the second tank body is connected to the vacuum pump connecting pipe; the secondary metal wire mesh and the tertiary filter element filter the gas again.

[0010] In one embodiment of the utility model, the first tank body is provided with a first air inlet and a first exhaust port, the second tank body is provided with a second air inlet and a second exhaust port, and the first exhaust port and the second air inlet are connected by a first pipe.

[0011] In one embodiment of the present invention, the first air inlet is arranged at a height higher than the first air outlet.

[0012] In one embodiment of the present invention, the second exhaust port is arranged at a height higher than the second air inlet.

[0013] In one embodiment of the present invention, the cooling pipe is spirally arranged in the first tank.

[0014] In one embodiment of the utility model, an electromagnetic on-off valve is provided on the vacuum pump connecting pipe.

[0015] In one embodiment of the present invention, a first drain valve is provided at the bottom of the first tank.

[0016] In one embodiment of the present invention, a second drain valve is provided at the bottom of the second tank.

[0017] The utility model also provides a formic acid vacuum furnace, comprising: a plurality of cavities for heating or cooling, wherein the cavities are connected with the formic acid vacuum furnace vacuum filtration system as described above through an exhaust pipe.

[0018] In one embodiment of the utility model, the air extraction pipe is provided with at least one of a pneumatic ball valve, a pressure relief valve and a pressure sensor.

[0019] The above technical solution of the utility model has the following advantages compared with the prior art:

[0020] The vacuum filtration system for a formic acid vacuum furnace of the utility model processes the soldering flux in a centralized manner, firstly filtering and cooling the gas in a first filtering mechanism, and then conveying the gas to a second filtering mechanism for further filtration, thereby fully recovering and filtering the soldering flux, and avoiding pollution to the product and the environment and damage to the formic acid vacuum furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0022] Figure 1 The utility model is a structural schematic diagram of a vacuum filtration system of a formic acid vacuum furnace.

[0023] Figure 2 It is an exploded view of the first filtering mechanism in the utility model.

[0024] Figure 3 It is an exploded view of the second filtering mechanism in the utility model.

[0025] Figure 4 The utility model is a schematic diagram of the working of the vacuum filtration system of the formic acid vacuum furnace.

[0026] Description of the Figures in the Specification:

[0027] 100, first filter mechanism; 101, first drain valve; 102, first cover; 103, primary metal wire mesh; 104, cooling pipe; 105, first tank; 106, first sealing element; 107, first air inlet; 108, first air outlet; 109, first bracket;

[0028] 200, second filter mechanism; 201, second drain valve; 202, second cover; 203, secondary metal wire mesh; 204, tertiary filter element; 205, second tank; 206, second sealing element; 207, second air inlet; 208, second air outlet; 209, second bracket;

[0029] 300, electromagnetic on-off valve;

[0030] 400, vacuum pump connecting pipe;

[0031] 501, pneumatic ball valve; 502, pressure relief valve; 503, pressure sensor; 504, air extraction pipe;

[0032] 600. Cavity. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0034] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only the directions of the reference drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention. In addition, in all embodiments, the same reference numerals represent the same elements.

[0035] Embodiment 1

[0036] Combination Figures 1 to 3 , a formic acid vacuum furnace vacuum filtration system, comprising:

[0037] The first filtering mechanism 100 includes a first tank body 105, a primary metal mesh 103 disposed in the first tank body 105, and a cooling pipe 104 disposed in the first tank body 105; the primary metal mesh 103 performs preliminary filtering on the gas entering the first tank body 105, and the cooling pipe 104 cools the gas;

[0038] The second filtering mechanism 200 is connected to the first filtering mechanism 100; the second filtering mechanism 200 includes a second tank body 205, a secondary metal wire mesh 203 arranged in the second tank body 205, and a tertiary filter element 204 arranged in the second tank body 205; the second tank body 205 is connected to the vacuum pump connecting pipe 400; the secondary metal wire mesh 203 and the tertiary filter element 204 filter the gas again.

[0039] The present embodiment provides a formic acid vacuum furnace vacuum filtration system, which separates and filters the flux. The gas is first preliminarily filtered and cooled in the first filtering mechanism 100, and then transported to the second filtering mechanism 200 for further filtration, so as to fully recover and filter the flux, thereby avoiding pollution to the product and the environment and damage to the formic acid vacuum furnace.

[0040] In this embodiment, the first tank body 105 is provided with a first air inlet 107 and a first air outlet 108 , and the first air inlet 107 is arranged at a higher height than the first air outlet 108 .

[0041] In this embodiment, the primary metal mesh 103 uses the physical blocking effect of the stainless steel mesh to trap large particles of impurities in the gas on the stainless steel mesh, thereby achieving preliminary filtration of the air. When the air passes through the primary metal mesh 103, the stainless steel mesh can effectively block large particles of impurities, so that the gas is initially purified. At the same time, the stainless steel mesh primary filter can also achieve continuous and stable filtering effects by replacing the filter mesh.

[0042] In this embodiment, the cooling pipe 104 is spirally disposed in the first tank 105 .

[0043] Furthermore, the first filtering mechanism 100 also includes a first cover 102 that is buckled on the top of the first tank 105, and the first cover 102 has a plurality of first through holes. Correspondingly, the top of the first tank 105 has a plurality of second through holes along its circumference, and the first fastening bolt passes through the first through hole and the second through hole in sequence. By tightening the first fastening bolt, the first cover 102 and the first tank 105 are fixedly connected. When the primary metal wire mesh 103 or the cooling pipe 104 needs to be replaced, it is only necessary to loosen the first fastening bolt and separate the first cover 102 and the first tank 105. Obviously, the number of the first through holes should be the same as the number of the second through holes.

[0044] Preferably, a first sealing element 106 is provided between the first cover body 102 and the first tank body 105. The first sealing element 106 can be an O-ring. When the first cover body 102 is buckled onto the first tank body 105, the O-ring fills the gap between the first cover body 102 and the first tank body 105 to achieve a sealing effect.

[0045] Furthermore, a first drain valve 101 is provided at the bottom of the first tank body 105 , and a waste liquid collection bottle is installed at the bottom of the first drain valve 101 for collecting waste water discharged from the first tank body 105 .

[0046] In this embodiment, a first bracket 109 is disposed on the side wall of the first tank body 105 , and the first bracket 109 is used to subsequently fix the first tank body 105 in the formic acid vacuum furnace.

[0047] In this embodiment, the second tank body 205 is provided with a second air inlet 207 and a second air outlet 208 , and the first air outlet 108 and the second air inlet 207 are connected via a first pipeline.

[0048] In this embodiment, similarly, the working principle of the secondary metal wire mesh 203 is the same as the working principle of the primary metal wire mesh 103 .

[0049] Furthermore, the second filtering mechanism 200 also includes a second cover 202 that is buckled on the top of the second tank 205, and the second cover 202 has a plurality of third through holes. Correspondingly, the top of the second cover 202 has a plurality of fourth through holes along its circumference, and the second fastening bolt passes through the third through hole and the fourth through hole in sequence. By tightening the second fastening bolt, the second cover 202 and the second tank 205 are fixedly connected. When the secondary metal wire mesh 203 or the tertiary filter element 204 needs to be replaced, it is only necessary to loosen the second fastening bolt and separate the second cover 202 and the second tank 205. Obviously, the number of the third through holes should be the same as the number of the fourth through holes.

[0050] Preferably, a second sealing element 206 is provided between the second cover 202 and the second tank body 205. The second sealing element 206 can be an O-ring. When the second cover 202 is buckled onto the second tank body 205, the O-ring fills the gap between the second cover 202 and the second tank body 205 to achieve a sealing effect.

[0051] Furthermore, a second drain valve 201 is provided at the bottom of the second tank body 205 . Similarly, a waste liquid collection bottle is installed at the bottom of the second drain valve 201 to collect waste water discharged from the second tank body 205 .

[0052] In this embodiment, a second bracket 209 is disposed on the side wall of the second tank body 205 , and the second bracket 209 is used to subsequently fix the second tank body 205 in the formic acid vacuum furnace.

[0053] In this embodiment, an electromagnetic on-off valve 300 is provided on the vacuum pump connecting pipe 400 , and a vacuum pump (not shown in the figure) is provided at the end of the vacuum pump connecting pipe 400 .

[0054] The working principle of the utility model is as follows:

[0055] The primary metal wire mesh 103 in the first tank body 105 performs preliminary filtration on the gas entering the system, and the cooling pipe 104 cools the high-temperature gas in the system to prevent the gas entering the system from being too hot and causing damage to the components.

[0056] The secondary metal wire mesh 203 and the tertiary filter element 204 in the second tank body 205 filter the cooled gas again, which can effectively filter out impurities in the gas.

[0057] Embodiment 2

[0058] like Figure 4 As shown, this embodiment provides a formic acid vacuum furnace, including a furnace body, in which a plurality of cavities 600 for heating and a plurality of cavities 600 for cooling are sequentially arranged along the length direction of the furnace body, wherein the cavity 600 is connected to the vacuum filtration system of the formic acid vacuum furnace provided in Example 1 through an exhaust pipe 504.

[0059] In this embodiment, the air extraction pipe 504 is provided with a pneumatic ball valve 501, a pressure relief valve 502 and a pressure sensor 503. The pneumatic ball valve 501 cooperates with the pressure sensor 503 and the electromagnetic on-off valve 300 to achieve the rapid realization of the vacuum degree process requirements in the vacuum filtration system of the formic acid vacuum furnace, and can self-regulate the vacuum degree to be stable. By opening the pressure relief valve 502 in time, it can be ensured that the pressure inside the vacuum filtration system of the formic acid vacuum furnace is not over-pressured.

[0060] The working principle of this embodiment is the same as that of the first embodiment, and will not be described in detail here.

[0061] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0062] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A formic acid vacuum furnace vacuum filtration system, characterized in that: include: A first filtering mechanism (100) comprises a first tank body (105), a primary metal wire mesh (103) disposed in the first tank body (105), and a cooling pipe (104) disposed in the first tank body (105); the primary metal wire mesh (103) performs preliminary filtering on gas entering the first tank body (105), and the cooling pipe (104) cools the gas; The second filtering mechanism (200) is connected to the first filtering mechanism (100); the second filtering mechanism (200) comprises a second tank body (205), a secondary metal wire mesh (203) disposed in the second tank body (205), and a tertiary filter element (204) disposed in the second tank body (205); the second tank body (205) is connected to a vacuum pump connecting pipe (400); the secondary metal wire mesh (203) and the tertiary filter element (204) filter the gas again.

2. The formic acid vacuum furnace vacuum filtration system according to claim 1, characterized in that: The first tank body (105) is provided with a first air inlet (107) and a first exhaust port (108), and the second tank body (205) is provided with a second air inlet (207) and a second exhaust port (208), and the first exhaust port (108) and the second air inlet (207) are connected via a first pipe.

3. The formic acid vacuum furnace vacuum filtration system according to claim 2, characterized in that: The first air inlet (107) is arranged at a height higher than the first air outlet (108).

4. The formic acid vacuum furnace vacuum filtration system according to claim 2, characterized in that: The second exhaust port (208) is arranged at a height higher than the second air inlet (207).

5. The formic acid vacuum furnace vacuum filtration system according to claim 1, characterized in that: The cooling pipe (104) is spirally arranged in the first tank body (105).

6. The formic acid vacuum furnace vacuum filtration system according to claim 1, characterized in that: The vacuum pump connecting pipe (400) is provided with an electromagnetic on-off valve (300).

7. The formic acid vacuum furnace vacuum filtration system according to claim 1, characterized in that: A first drain valve (101) is provided at the bottom of the first tank (105).

8. The formic acid vacuum furnace vacuum filtration system according to claim 1, characterized in that: A second drain valve (201) is provided at the bottom of the second tank body (205).

9. A formic acid vacuum furnace, characterized in that: include: A plurality of chambers (600) for heating or cooling, wherein the chambers (600) are connected to the vacuum filtration system of the formic acid vacuum furnace according to any one of claims 1 to 8 via an exhaust pipe (504).

10. The formic acid vacuum furnace according to claim 9, characterized in that: The air extraction pipe (504) is provided with at least one of a pneumatic ball valve (501), a pressure relief valve (502) and a pressure sensor (503).

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