CN115815728A

CN115815728A - Welding furnace convenient to clean and cleaning method thereof

Info

Publication number: CN115815728A
Application number: CN202310114552.4A
Authority: CN
Inventors: 陈能强
Original assignee: Wuxi Chang Ding Electronics Co ltd
Current assignee: Wuxi Chang Ding Electronics Co ltd
Priority date: 2023-02-15
Filing date: 2023-02-15
Publication date: 2023-03-21
Anticipated expiration: 2043-02-15
Also published as: CN115815728B

Abstract

The invention belongs to the technical field of welding furnaces, and relates to a welding furnace convenient to clean, which comprises a welding furnace body and a welding furnace cover, wherein an exhaust fan is arranged inside the welding furnace cover, an air suction pipeline is horizontally arranged at the input end of the exhaust fan, an installation partition plate is obliquely arranged inside the air suction pipeline, an installation round hole is formed in the installation partition plate, a filter plate is arranged inside the installation round hole, a cleaning shaft is rotatably arranged on the windward side of the filter plate, elastic scraping blades are circumferentially arrayed on the cleaning shaft, a blocking block is further arranged on the windward side of the filter plate, a driving unit for driving the cleaning shaft to rotate is arranged on the leeward side of the filter plate, a connecting pipe positioned below the filter plate is arranged on the exhaust pipe, and an oil collecting tank is arranged at the bottom end of the connecting pipe. The welding oil fume in the gas is filtered by the filter plate, and the filtered clean gas drives the elastic scraping blade to scrape the welding oil on the surface of the filter plate, so that the welding oil falls into the oil collecting tank connected with the connecting pipe.

Description

Welding furnace convenient to clean and cleaning method thereof

Technical Field

The invention belongs to the technical field of welding furnaces, and particularly relates to a welding furnace convenient to clean and a cleaning method thereof.

Background

The soldering furnace is mainly used in semiconductor electronic package industry, generally, the solder paste is printed on the preset position of the power device lead frame, then the crystal grains are respectively placed on the solder paste on the preset position, then the power device lead frame together with the solder paste and the crystal grains are sent into the soldering furnace to be heated, the solder paste is melted by the high temperature in the soldering furnace, the pin of the crystal grains is wrapped by the molten solder paste, and after the solder paste is cooled to be solid, the crystal grains and the copper foil circuit on the power device lead frame can be electrically connected.

However, the existing welding furnace still has some defects: 1. because the solder paste is provided with the soldering flux, the solder paste can volatilize in the sintering and melting process and then accumulate in the furnace chamber, so that the heating is uneven, and a protective gas outlet is blocked or the solder paste drips on a product after accumulation to form a quality hidden trouble; 2. when the gas that volatilizees the tin cream is discharged, filter equipment's surface is blockked up by the tin cream easily, is difficult to the clearance and need pull down filter equipment when clearing up, very consuming time and wasting force.

Disclosure of Invention

The invention aims to provide a welding furnace convenient to clean and a cleaning method thereof, and aims to solve the technical problems that in the prior art, because soldering paste is provided with soldering flux, the soldering paste volatilizes in the sintering and melting process and then accumulates in a furnace chamber, so that heating is not uniform, a protective gas outlet is blocked or the soldering paste drips on a product after accumulation to form quality hidden trouble, when gas volatilized from the soldering paste is discharged, the surface of a filtering device is easily blocked by the soldering paste, cleaning is difficult, and the filtering device needs to be detached during cleaning, so that time and labor are consumed very much.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a welding furnace convenient to clean, which comprises a welding furnace body and a welding furnace cover, wherein an exhaust fan is arranged inside the welding furnace cover, an input end of the exhaust fan is horizontally provided with an air suction pipeline, an output end of the exhaust fan is provided with an exhaust pipeline, an installation partition plate is obliquely arranged inside the air suction pipeline, installation round holes are formed in the installation partition plate, a filter plate is arranged inside the installation round holes, a cleaning shaft is arranged on the windward side of the filter plate in a rotating mode, elastic scraping blades are arranged on the cleaning shaft in a circumferential array mode, an oil scraping part is arranged on one side of each elastic scraping blade, an oil guiding part is arranged on the other side of each elastic scraping blade, a blocking block is further arranged on the windward side of the filter plate, a driving unit used for driving the cleaning shaft to rotate is arranged on the leeward side of the filter plate, a connecting pipe located below the filter plate is arranged on the exhaust pipeline, an oil collecting tank is arranged at the bottom end of the connecting pipe, an oil discharging pipeline is arranged on the oil collecting tank, a driving rod is arranged inside the oil collecting tank, an output end of the driving rod is provided with an oil pushing plate, and a sealing plate used for sealing the port of the connecting pipe is further arranged inside the oil collecting tank.

Preferably, the section of the oil scraping part is of a semicircular structure and is abutted to the windward side of the filter plate.

Preferably, the cross section of the oil guide part is of a triangular structure.

Preferably, the windward side of the stop block is of an arc structure.

Preferably, the driving unit comprises a driving box, the driving box is horizontally arranged on the lee side of the filter plate, a first driving shaft is horizontally arranged on the driving box in a rotating mode, one end of the first driving shaft extends to the outside of the driving box, a driving wind wheel is arranged at the end of the first driving shaft, the other end of the first driving shaft extends to the inside of the driving box, a first gear is arranged at the end of the driving box, a second driving shaft is horizontally arranged in the driving box in a rotating mode, a second gear and a third gear are arranged on the second driving shaft, the second gear is meshed with the first gear, a third driving shaft is obliquely arranged in the driving box in a rotating mode, a fourth gear and a fifth gear are arranged on the third driving shaft, the fourth gear is meshed with the third gear, the other end of the cleaning shaft extends to the inside of the driving box, a driving gear is arranged at the end of the cleaning shaft, and the driving gear is meshed with the fifth gear.

Preferably, the top of the inner wall of the oil collecting tank is provided with a limiting plate, the limiting plate and the closing plate are positioned in the same plane, and the limiting plate and the closing plate are positioned on two sides of the port of the connecting pipe.

Preferably, a sliding rail is arranged on one side of the inner wall of the oil collecting tank, and a sliding block is arranged on the bottom side of the closing plate and is in sliding connection with the sliding rail.

Preferably, a linkage plate is arranged on the closing plate, and a tension spring is arranged between the linkage plate and the oil pushing plate.

Preferably, the input end of the air suction pipeline is provided with an air suction cover, and the air suction cover is positioned on the inner side surface of the welding furnace cover.

The invention also provides a cleaning method of the welding furnace convenient to clean, which comprises the following steps:

s1, sucking gas in a welding furnace body into an air suction pipeline through an exhaust fan;

s2, filtering the welding oil in the gas through a filter plate;

s3, scraping off the welding oil on the surface of the filter plate through the elastic scraping blade, so that the welding oil is collected in the oil collecting tank;

s4, sealing the port of the connecting pipe through a sealing plate;

and S5, pushing out the welding oil in the oil collecting tank through the oil pushing plate.

Compared with the prior art, the invention has the beneficial effects that:

firstly, the welding furnace convenient to clean and the cleaning method thereof filter the welding oil smoke in the gas through the filter plate, then drive the elastic scraping blade to scrape the welding oil on the surface of the filter plate through the filtered clean gas, so that the welding oil falls into the oil collecting tank connected with the connecting pipe, the welding oil on the surface of the filter plate is cleaned in time, and the surface of the filter plate is prevented from being blocked by the solder paste.

Secondly, according to the welding furnace convenient to clean and the cleaning method thereof, the filter plate is obliquely arranged, so that the welding oil scraped by the elastic scraping blade can slide from the oil scraping part to the oil guiding part conveniently, and then the welding oil can directly fall into the oil collecting tank connected with the connecting pipe under the pushing action of the subsequently scraped welding oil and the self gravity, and the scraped welding oil is prevented from being bonded together.

Thirdly, the welding furnace convenient to clean and the cleaning method thereof enable the elastic scraping blade to deform in the rotating process through the blocking block, and when the elastic scraping blade rotates to be separated from the blocking block, the scraping welding oil can be directly flicked into the oil collecting tank under the elastic acting force of restoring the deformation, so that the scraping welding oil is further prevented from being bonded together.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

In the drawings:

FIG. 1 is a schematic perspective view of a welding furnace for easy cleaning according to the present invention;

FIG. 2 is a schematic cross-sectional view of a welding furnace of the present invention for easy cleaning;

FIG. 3 is a schematic cross-sectional view of an exhaust fan and a drive case according to the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 3 according to the present invention;

FIG. 5 is an enlarged view of the structure at B in FIG. 4 according to the present invention;

FIG. 6 is a perspective view of the exhaust fan and the driving box of the present invention;

FIG. 7 is a schematic cross-sectional view of an air suction duct according to the present invention;

FIG. 8 is an enlarged view of the structure of FIG. 7 at C according to the present invention;

FIG. 9 is a schematic perspective view of a stop according to the present invention;

fig. 10 is a partial sectional structural view of the drive case of the present invention.

In the figure:

1. welding the furnace body; 11. welding a furnace cover; 2. an exhaust fan; 21. an air suction pipeline; 22. an exhaust duct; 23. an air suction hood; 3. installing a partition plate; 31. a filter plate; 32. cleaning the shaft; 33. an elastic wiper blade; 34. an oil scraping part; 35. an oil guide part; 36. a blocking block; 37. a drive gear; 4. a drive box; 41. a first drive shaft; 42. driving the wind wheel; 43. a first gear; 44. a second drive shaft; 45. a second gear; 46. a third gear; 47. a third drive shaft; 48. a fourth gear; 49. a fifth gear; 5. a connecting pipe; 6. an oil collecting tank; 61. an oil discharge pipe; 62. a drive rod; 63. an oil pushing plate; 64. a closing plate; 65. a limiting plate; 66. a slide rail; 67. a slider; 68. a linkage plate; 69. a tension spring.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Referring to fig. 1 to 10, the invention provides a welding furnace convenient to clean, which comprises a welding furnace body 1 and a welding furnace cover 11, wherein an exhaust fan 2 is arranged inside the welding furnace cover 11, an input end of the exhaust fan 2 is horizontally provided with an air suction pipeline 21, an output end of the exhaust fan 2 is provided with an exhaust pipeline 22, an input end of the air suction pipeline 21 is provided with an air suction hood 23, the air suction hood 23 is positioned on the inner side surface of the welding furnace cover 11, the air suction pipeline 21 is obliquely provided with a mounting partition plate 3, the mounting partition plate 3 is provided with mounting circular holes, a filter plate 31 is arranged inside the mounting circular holes, a windward surface of the filter plate 31 is rotatably provided with a cleaning shaft 32, the cleaning shaft 32 is circumferentially provided with elastic scraping blades 33, one side of the elastic scraping blades 33 is provided with an oil scraping part 34, the other side of the elastic scraping blades 33 is provided with an oil guide part 35, the windward surface of the filter plate 31 is also provided with a blocking block 36, a leeward surface of the filter plate 31 is provided with a driving unit for driving the cleaning shaft 32 to rotate, the exhaust pipeline 22 is provided with a connecting pipe 5 positioned below the filter plate 31, the bottom end of the connecting pipe 5 is provided with an oil collecting tank 6, an oil discharge pipe 61 is provided with an oil collecting tank 6, an oil collecting plate 62, and a driving rod 64 for pushing and a sealing end of the connecting rod 64 for pushing the oil collecting plate 6.

s1, sucking gas in a welding furnace body 1 into an air suction pipeline 21 through an exhaust fan 2;

s2, filtering the welding oil in the gas through a filter plate 31;

s3, scraping off the welding oil on the surface of the filter plate 31 through the elastic scraping blade 33, so that the welding oil is collected in the oil collecting tank 6;

s4, closing the port of the connecting pipe 5 through a closing plate 64;

and S5, pushing out the welding oil in the oil collecting tank 6 through the oil pushing plate 63.

When welding process procedure is carried out to welding furnace body 1 and welding bell 11, because the tin cream itself has the scaling powder, consequently can volatilize in sintering melting in-process, exhaust fan 2 inhales the suction hood 23 through the gas that suction duct 21 will volatilize this moment, when the gas that volatilizees gets into the inside of suction duct 21 through suction hood 23, filter 31 can filter the welding oil flue gas in the gas, the welding oil flue gas that filters down can form the welding oil and then attach to the surface of filter 31, the clean gas after the filtration passes through exhaust duct 22 and discharges, in this process, the drive unit is under clean gaseous drive power, can drive clearance axle 32 and drive elastic scraping blade 33 and rotate, elastic scraping blade 33 can scrape the welding oil on filter 31 surface when rotating, make the welding oil fall into the collection oil tank 6 inside connecting pipe 5 connects.

Furthermore, because the welding oil itself has certain adhesiveness, the welding oil adhered together after being scraped by the elastic scraping blade 33 can slide along the surface of the filter plate 31 under the pushing of the elastic scraping blade 33, the welding oil which is adhered together is more adhesive when being difficult to fall into the oil collecting tank 6, the air permeability of the filter plate 31 is affected, when the welding oil on the surface of the filter plate 31 is adhered into a whole, even the welding oil scraped by the elastic scraping blade 33 can not fall into the oil collecting tank 6 after completely separating from the filter plate 31, and the surface of the filter plate 31 is completely blocked, so that the filter plate 31 is obliquely arranged, the welding oil scraped by the elastic scraping blade 33 can conveniently slide from the oil scraping part 34 to the oil guiding part 35, and then directly fall into the oil collecting tank 6 connected with the connecting pipe 5 under the pushing of the subsequently scraped welding oil and the self gravity, the scraped welding oil can be prevented from being adhered together, and the elastic scraping blade 33 can be deformed when contacting with the blocking block 36 during the rotation, and the elastic scraping oil can be recovered under the elastic force of the elastic scraping blade 33 and can be further prevented from being adhered together.

Further, as shown in fig. 7, 8 and 9, the section of the oil scraping portion 34 is a semicircular structure and abuts against the windward side of the filter plate 31, the section of the oil guiding portion 35 is a triangular structure, the blocking block 36 is a quarter-circle structure, the semicircular structure of the oil scraping portion 34 facilitates the sliding of the welding oil from the oil scraping portion 34 to the oil guiding portion 35, the triangular structure of the oil guiding portion 35 facilitates the sliding of the welding oil from the oil guiding portion 35 to the inside of the oil collecting tank 6, the windward side of the blocking block 36 is an arc structure, and specifically, the thickness gradually increases along the rotation direction of the elastic scraping blade 33, so when the elastic scraping blade 33 rotates to abut against the windward side of the blocking block 36, the elastic scraping blade 33 can be bent and deformed by the blocking of the blocking block 36, and gradually separates from the filter plate 31, and when the elastic scraping blade 33 separates from the blocking block 36 and recovers deformation, the welding oil scraped by the force recovered from the deformation can be directly attached to the inside of the oil collecting tank 6, and since the elastic scraping blade 33 is in a state of being separated from the filtering plate 31, the surface of the filtering plate 31 can be prevented from being thrown off when the surface of the elastic scraping blade 33.

Specifically, as shown in fig. 4 and 5, the driving unit includes a driving box 4, the driving box 4 is horizontally disposed on a leeward side of the filtering plate 31, a first driving shaft 41 is horizontally disposed on the driving box 4 in a rotating manner, one end of the first driving shaft 41 extends to an outside of the driving box 4 and is provided with a driving wind wheel 42, the other end of the first driving shaft 41 extends to an inside of the driving box 4 and is provided with a first gear 43, the inside of the driving box 4 is horizontally provided with a second driving shaft 44 in a rotating manner, a second gear 45 and a third gear 46 are disposed on the second driving shaft 44, the second gear 45 is engaged with the first gear 43, the inside of the driving box 4 is obliquely provided with a third driving shaft 47, the third driving shaft 47 is provided with a fourth gear 48 and a fifth gear 49, the fourth gear 48 is engaged with the third gear 46, the other end of the cleaning shaft 32 extends to the inside of the driving box 4 and is provided with a driving gear 37, the driving gear 37 is engaged with the fifth gear 49, clean gas filtered by the filtering plate 31 drives the driving wind wheel 42 to rotate, when the driving gear 43 rotates, the elastic scraper 46 rotates, when the elastic scraper 32 rotates, the elastic scraper drives the elastic scraper 46 to rotate, the elastic scraper 37 rotates, the elastic scraper 37 drives the elastic scraper to rotate, and drives the elastic scraper 46 to rotate, when the elastic scraper 46 rotates, the elastic scraper 33 drives the elastic scraper 33 to rotate, and the elastic scraper 46 to rotate, and drives the elastic scraper 33 to rotate.

Furthermore, the connection between the first gear 43 and the second gear 45, the connection between the third gear 46 and the fourth gear 48, and the cooperation between the fifth gear 49 and the driving gear 37 can convert the horizontal rotation force of the driving wind wheel 42 into the oblique rotation force of the elastic blades 33, and simultaneously reduce the rotation speed of the elastic blades 33 to increase the rotation force thereof, so that the elastic blades 33 can scrape the solder paste on the surface of the filter plate 31.

When the welding oil in the oil collecting tank 6 reaches a certain amount, the driving rod 62 pushes the oil pushing plate 63 to discharge the welding oil in the oil collecting tank 6 from the oil discharge pipe 61, as shown in fig. 3 and 10, the top of the inner wall of the oil collecting tank 6 is provided with the limit plate 65, the limit plate 65 and the closing plate 64 are positioned in the same plane and positioned at two sides of the port of the connecting pipe 5, one side of the inner wall of the oil collecting tank 6 is provided with the slide rail 66, the bottom side of the closing plate 64 is provided with the slide block 67, the slide block 67 is connected with the slide rail 66 in a sliding manner, the closing plate 64 is provided with the linkage plate 68, a tension spring 69 is arranged between the linkage plate 68 and the oil pushing plate 63, when the driving rod 62 pushes the oil pushing plate 63 to extrude the welding oil in the oil collecting tank 6 to the oil discharge pipe 61, the oil pushing plate 63 drives the linkage plate 68 connected with the tension spring 69 to move towards the oil discharge pipe 61, the linkage plate 68 can drive the closing plate 64 to move to the direction of the limiting plate 65 to abut against the limiting plate 65 when moving to the direction of the oil discharge pipeline 61, at the moment, the linkage plate 68 can ensure the stability when moving through the connection of the slide block 67 and the slide rail 66, when the closing plate 64 abuts against the limiting plate 65, the port of the connecting pipe 5 can be closed, at the moment, the oil pushing plate 63 can continue to move to the direction of the oil discharge pipeline 61 under the pushing action force of the driving rod 62, meanwhile, the welding oil in the oil collection tank 6 is extruded to the oil discharge pipeline 61, at the moment, the tension spring 69 can deform under the pulling action of the oil pushing plate 63, because the closing plate 64 closes the port of the connecting pipe 5, when the welding oil in the oil collection tank 6 is extruded to the oil discharge pipeline 61 by the oil pushing plate 63, the welding oil cannot enter the inside of the air suction pipeline 21 from the port of the connecting pipe 5.

Further, after the driving rod 62 pushes the oil pushing plate 63 to discharge the welding oil in the oil collecting tank 6 from the oil discharge pipeline 61, the driving rod 62 can drive the oil pushing plate 63 to reset, at this time, the oil pushing plate 63 can drive the linkage plate 68 connected by the tension spring 69 to reset, and meanwhile, the linkage plate 68 can drive the closing plate 64 to break away from the limiting plate 65 to reset, so that the port of the connecting pipe 5 is released from the closing state.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a welding furnace convenient to clearance, includes welding furnace body (1) and welding bell (11), its characterized in that: the welding furnace is characterized in that an exhaust fan (2) is arranged inside the welding furnace cover (11), an air suction pipeline (21) is horizontally arranged at the input end of the exhaust fan (2), an exhaust pipeline (22) is arranged at the output end of the exhaust fan (2), an installation partition plate (3) is obliquely arranged inside the air suction pipeline (21), an installation round hole is formed in the installation partition plate (3), a filter plate (31) is arranged inside the installation round hole, a cleaning shaft (32) is arranged on the windward side of the filter plate (31) in a rotating manner, elastic scraping blades (33) are arranged on the cleaning shaft (32) in a circumferential array manner, an oil scraping part (34) is arranged on one side of each elastic scraping blade (33), an oil guiding part (35) is arranged on the other side of each elastic scraping blade (33), a blocking block (36) is further arranged on the windward side of the filter plate (31), a driving unit for driving the cleaning shaft (32) to rotate is arranged on the leeward side of the filter plate (31), a connecting pipe (5) below the filter plate (31), an oil collecting tank (6) is arranged at the bottom end of the connecting pipe (5), an oil collecting tank (6) is arranged on the oil collecting tank (62), and an oil pushing driving rod (62) is arranged on the driving rod (62), and a closing plate (64) for closing the port of the connecting pipe (5) is also arranged in the oil collecting tank (6).

2. The easy-to-clean welding furnace of claim 1, wherein: the section of the oil scraping part (34) is of a semicircular structure and is abutted to the windward side of the filter plate (31).

3. The easy-to-clean welding furnace of claim 1, wherein: the cross section of the oil guide part (35) is of a triangular structure.

4. The easy-to-clean welding furnace of claim 1, wherein: the windward side of the stop block (36) is of an arc structure.

5. The easy-to-clean welding furnace of claim 1, wherein: the driving unit comprises a driving box (4), the driving box (4) is horizontally arranged on the leeward side of the filtering plate (31), a first driving shaft (41) is horizontally arranged on the driving box (4) in a rotating mode, one end of the first driving shaft (41) extends to the outside of the driving box (4), a driving wind wheel (42) is arranged at the end of the first driving shaft, the other end of the first driving shaft (41) extends to the inside of the driving box (4), a first gear (43) is arranged at the end of the driving box, a second driving shaft (44) is horizontally arranged in the driving box (4) in a rotating mode, a second gear (45) and a third gear (46) are arranged on the second driving shaft (44), the second gear (45) is connected with the first gear (43) in a meshing mode, a third driving shaft (47) is obliquely arranged in the driving box (4), a fourth gear (48) and a fifth gear (49) are arranged on the third driving shaft (47), the fourth gear (48) is connected with the third gear (46) in a meshing mode, a cleaning shaft (32) extends to the other end of the driving box (32) and is connected with a cleaning shaft (49).

6. The easy-to-clean welding furnace of claim 1, wherein: the top of the inner wall of the oil collecting tank (6) is provided with a limiting plate (65), the limiting plate (65) and the closing plate (64) are positioned in the same plane, and the limiting plate and the closing plate are positioned at two sides of the port of the connecting pipe (5).

7. The easy-to-clean welding furnace of claim 1, wherein: a sliding rail (66) is arranged on one side of the inner wall of the oil collecting tank (6), a sliding block (67) is arranged on the bottom side of the closing plate (64), and the sliding block (67) is connected with the sliding rail (66) in a sliding mode.

8. The easy-to-clean welding furnace of claim 1, wherein: the oil pushing plate is characterized in that a linkage plate (68) is arranged on the closing plate (64), and a tension spring (69) is arranged between the linkage plate (68) and the oil pushing plate (63).

9. The easy-to-clean welding furnace of claim 1, wherein: the input end of air suction pipeline (21) is equipped with air suction cover (23), air suction cover (23) are located the medial surface of welding bell (11).

10. A method of cleaning a welding furnace for facilitating cleaning as claimed in any of claims 1-9, characterized by the steps of:

s1, sucking gas in a welding furnace body (1) into an air suction pipeline (21) through an exhaust fan (2);

s2, filtering the welding oil in the gas through a filter plate (31);

s3, scraping off the welding oil on the surface of the filter plate (31) through an elastic scraping blade (33), so that the welding oil is collected in the oil collecting tank (6);

s4, sealing the port of the connecting pipe (5) through a sealing plate (64);

and S5, pushing out the welding oil in the oil collecting tank (6) through the oil pushing plate (63).