A nitrogen inlet furnace device

Abstract

The invention relates to the technical field of welding equipment, and discloses a nitrogen gas entering furnace chamber device, comprising a reflow furnace shell, a heating furnace supporting shell is arranged on the reflow furnace shell, a heating furnace shell is arranged on the heating furnace supporting shell, an air inlet and a rectifier plate are arranged on the heating furnace shell, and a plurality of air outlet holes arranged in a grid are opened on the rectifier plate; a motor plate and a heating wire are arranged on the reflow furnace shell, a first high-temperature motor is arranged on the motor plate, a nitrogen gas inlet is opened on the first high-temperature motor for introducing nitrogen gas into the air inlet, and the heating wire is used to heat the nitrogen gas; the nitrogen gas entering furnace chamber device squeezes the nitrogen gas in the buffer chamber into the heating furnace according to the Bernoulli principle through a group of axial flow wind wheels which are also selectively driven by the high-temperature motor, thereby improving the diffusion efficiency of the nitrogen gas in the heating furnace, and the airflow direction of the air outlet hole can be deflected and adjusted up, down, left, and right.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, in particular to a nitrogen gas entering a furnace. Background Art

[0002] SMT is a surface mounting technology in the electronic assembly industry. It is a circuit assembly technology that mounts pinless or short-lead surface mounting components on the surface of a PCB (printed circuit board) or other substrates, and assembles them by soldering through reflow soldering or dip soldering.

[0003] The reflow soldering process needs to be implemented using a reflow soldering furnace. The principle is: after the SMT machine has finished mounting the components, it enters the furnace of the reflow soldering furnace. Through the principles of heat conduction, convection and radiation and in accordance with the solder paste characteristic temperature curve provided by the manufacturer, the furnace temperature is set to solder the active / passive components to the printed circuit board. The reflow soldering furnace includes a preheating zone, a reflow zone and a cooling zone. The reflow zone is mainly used to melt the solder paste to solder the components to the PCB. In order to reduce the high-temperature oxidation of easily oxidizable materials such as solder paste or silver during the process, a large amount of nitrogen is often flushed into the reflow zone to form a stable protective atmosphere with low oxygen content. In traditional equipment, nitrogen enters through the upper position of the furnace. After entering the furnace, it cannot fill the entire furnace, resulting in uneven nitrogen at the hot air outlet. Without nitrogen, the product discolors at the welding position, and the welding effect does not meet the requirements.

[0004] In Comparative Document 1 (CN202210215213.0), a nitrogen control sealing system for an air-moving motor is disclosed, including a high-temperature motor, a nitrogen box connected to the high-temperature motor, and a wind wheel connected to the nitrogen box. The system also includes a motor mounting plate and a sealing ring. Comparative Document 1 diffuses nitrogen by driving the centrifugal wind wheel to rotate through a high-temperature motor, and the target of nitrogen diffusion is the reflow furnace. However, since the nitrogen needs to be heated in the reflow furnace to achieve the purpose of protecting the atmosphere, the temperature and high pressure in the reflow furnace will also increase, which will cause resistance to the injection of nitrogen.

[0005] Therefore, in actual production, when the centrifugal impeller is used for rotation and diffusion, the nitrogen injection efficiency needs to be improved. In order to solve the above problem, a nitrogen introduction device for the furnace is proposed. Summary of the invention

[0006] The present invention provides a nitrogen entering furnace device, which has the advantages of squeezing the nitrogen in the buffer chamber into the heating furnace according to the Bernoulli principle through a group of axial flow fans which are also selectively driven by a high-temperature motor, thereby improving the diffusion efficiency of the nitrogen in the heating furnace, and the airflow direction of the air outlet can be deflected and adjusted up, down, left and right, thereby solving the problem that the nitrogen in the equipment mentioned in the above background technology enters through the position above the furnace, cannot fill the entire furnace after entering the furnace, causing uneven nitrogen at the hot air outlet, discoloration of the product at the welding position without nitrogen, and the welding effect cannot meet the requirements, and the temperature and high pressure in the heating furnace are strong and cause resistance to nitrogen injection.

[0007] The present invention provides the following technical solution: a nitrogen gas entering furnace device, comprising a reflow furnace shell, a heating furnace support shell is arranged on the reflow furnace shell, a heating furnace shell is arranged on the heating furnace support shell, an air inlet and a rectifier plate are arranged on the heating furnace shell, and a plurality of air outlet holes arranged in a grid are opened on the rectifier plate;

[0008] The reflow furnace housing is provided with a motor plate and a heating wire, the motor plate is provided with a first high-temperature motor, the first high-temperature motor is provided with a nitrogen inlet for introducing nitrogen into the air inlet, and the heating wire is used to heat the nitrogen;

[0009] A diffusion mechanism is provided in the heating furnace shell to diffuse the heated nitrogen into the heating furnace shell and output it through a plurality of the air outlet holes for welding, the diffusion mechanism includes an air guide cover provided in the heating furnace shell, a centrifugal fan wheel is rotatably provided in the air guide cover, and the centrifugal fan wheel is connected to the motor shaft of the first high-temperature motor;

[0010] A buffer chamber shell is also provided on the heating furnace support shell, and two ends of the buffer chamber shell are respectively connected to the heating furnace support shell and the heating furnace shell, and the buffer chamber shell is used to store buffer nitrogen;

[0011] An auxiliary air supply mechanism is arranged in the buffer chamber shell, and the auxiliary air supply mechanism includes an axial flow fan arranged in the buffer chamber shell. The axial flow fan drives the nitrogen in the buffer chamber shell to enter the heating furnace shell by rotating.

[0012] As an optional solution of the nitrogen entering furnace device of the present invention, wherein: the motor plate is connected to the reflow furnace shell through a sealing gasket, the reflow furnace shell is provided with a motor shaft sleeve and a single lip oil seal, and the motor shaft sleeve is connected to the heating furnace shell;

[0013] The motor shaft of the first high-temperature motor is located in the motor shaft sleeve and the single-lip oil seal, and a plurality of pads are arranged on the motor plate.

[0014] As an optional solution of the nitrogen entering furnace device described in the present invention, the auxiliary air supply mechanism also includes a collar arranged on the motor shaft of the first high-temperature motor, a plurality of clamping blocks are arranged on the axial flow fan wheel, a plurality of clamping grooves are opened on the collar, and the plurality of clamping grooves are respectively matched with the plurality of clamping blocks.

[0015] As an optional solution of the nitrogen entering the furnace device described in the present invention, the auxiliary air supply mechanism also includes two electric push rods symmetrically arranged on the heating furnace shell, and the telescopic rods of the two electric push rods are provided with connecting rings, and the axial flow fan is rotatably arranged on the connecting rings.

[0016] As an optional solution of the nitrogen gas entering the furnace device of the present invention, wherein: a plurality of the air outlet holes are rotatably provided with an adjustment plate, a first airflow adjustment mechanism and a first driving mechanism are provided on the heating furnace shell, and the first driving mechanism is used to drive the plurality of the adjustment plates to rotate about the longitudinal central axis;

[0017] The first airflow adjustment mechanism includes a plurality of first rotating rods longitudinally rotatably arranged on the rectifying plate, and two first rotating grooves are symmetrically opened on the plurality of adjustment plates along the transverse central axis, and the plurality of first rotating grooves are respectively matched with the plurality of first rotating rods.

[0018] As an optional solution of the nitrogen entering furnace device of the present invention, wherein: the first driving mechanism comprises a support plate arranged on the shell of the heating furnace, a limiting groove is provided on the support plate, a slider is slidably arranged in the limiting groove, and the slider is provided with a first tooth portion and a second tooth portion;

[0019] A plurality of the first rotating rods located at the lowermost side are each provided with a first gear, and a plurality of the first gears are each meshed with the second toothed portion.

[0020] As an optional solution of the nitrogen entering the furnace device described in the present invention, the first driving mechanism also includes a second high-temperature motor arranged on the support plate, the second high-temperature motor is provided with a second gear, and the second gear is meshed with both the first tooth portion and the second tooth portion.

[0021] As an optional solution of the nitrogen gas entering the furnace device of the present invention, wherein: the heating furnace shell is also provided with a second airflow adjustment mechanism and a second driving mechanism, and the second driving mechanism is used to drive a plurality of the adjustment plates to rotate about a transverse central axis;

[0022] The second airflow adjustment mechanism includes a plurality of second rotating rods which are laterally rotatably arranged on the rectifying plate, and the plurality of adjustment plates are symmetrically provided with two second rotating grooves along the longitudinal central axis, and the plurality of second rotating grooves are respectively matched with the plurality of second rotating rods;

[0023] The second driving mechanism has the same structure as the first driving mechanism.

[0024] As an optional solution of the nitrogen gas entering the furnace device of the present invention, wherein: the heating mechanism comprises two heating wires arranged in the heating furnace shell, a ceramic terminal board is arranged on the heating furnace shell, and the two heating wires are connected to the ceramic terminal board;

[0025] A cover plate is arranged on the shell of the heating furnace, a heat-resistant wire is arranged on the cover plate, and the heat-resistant wire is connected to the ceramic wiring board.

[0026] As an optional solution of the nitrogen entering furnace device described in the present invention, the heating mechanism also includes a fixing frame arranged in the heating furnace shell, a plurality of fixing rings are arranged on the fixing frame, and the two heating wires are arranged on the plurality of fixing rings.

[0027] The present invention has the following beneficial effects:

[0028] 1. This nitrogen enters the furnace device, compared with the traditional equipment where nitrogen enters the furnace through the upper side of the furnace, and the diffusion is not complete and uniform. In this device, before the nitrogen enters the heating furnace shell through the nitrogen inlet, it is first buffered and stored through the buffer chamber shell. When the first high-temperature motor is running, it drives the centrifugal wind wheel to rotate in the air guide cover, and the centrifugal force is used to swing the nitrogen in the heating furnace shell to the surroundings, so that it is evenly diffused in the entire heating furnace shell chamber, and heated by two heating wires. Then, it is evenly output to the welded PCB through several air outlet holes on the rectifier plate. Compared with the traditional direct nitrogen filling, the setting of several air outlet holes can achieve better welding effects.

[0029] 2. When the nitrogen enters the furnace device and the temperature and pressure in the heating furnace shell are high and the nitrogen injection is hindered, the two electric push rods can be used to drive the axial flow fan wheel to move to the air inlet, and the axial flow fan wheel is connected to the motor shaft of the first high temperature motor. When the first high temperature motor is running, the axial flow fan wheel also rotates to generate airflow blowing to the air inlet. At this time, according to Bernoulli's principle, the smaller pressure at the air inlet will cause the nitrogen in the buffer chamber shell to be squeezed into the heating furnace shell by the pressure difference, thereby increasing the speed of nitrogen injection and resisting the resistance caused by thermal pressure.

[0030] 3. The nitrogen enters the furnace device. Compared with the traditional nitrogen atmosphere filling method, the airflow output through a number of air outlets in this device can also be adjusted in the up, down, left and right directions. The operation of the second high-temperature motor drives the slider to move left and right, and then drives a number of first gears to rotate forward and reverse along the up and down axis directions. At this time, a number of adjustment plates installed in the air outlets will adjust the left and right wind direction of the output nitrogen. And a number of adjustment plates can also rotate in the up and down directions. When the second high-temperature motor is operated to make the several adjustment plates rotate to be parallel to the rectifier plate, the first rotating rod and the first rotating groove are disengaged, and the second rotating rod and the second rotating groove are connected. At this time, the second driving mechanism can drive the several adjustment plates to rotate in the left and right directions to adjust the up and down wind direction of the output nitrogen. Therefore, according to the specific requirements during welding, the wind direction can be adjusted to meet more complex welding needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0032] Figure 2 It is a schematic diagram of the overall explosion structure of the present invention.

[0033] Figure 3 It is a schematic diagram of the explosion structure at the diffusion mechanism in the present invention.

[0034] Figure 4 for Figure 3 A partial enlarged view of point A in the middle.

[0035] Figure 5 It is a schematic diagram of the explosion structure at the rectifier plate in the present invention.

[0036] Figure 6 It is a schematic diagram of the local structure of the adjustment plate in the present invention.

[0037] Figure 7 It is a schematic diagram of the local structure of the heating mechanism in the present invention.

[0038] Figure 8 It is a schematic diagram of the internal structure of the present invention.

[0039] Fig. 9 for Figure 8 A partial enlarged view of point B in the middle.

[0040] In the figure: 1. Reflow furnace shell; 2. Heating furnace support shell; 201. Heating furnace shell; 202. Air inlet; 203. Rectifier plate; 204. Air outlet; 205. Buffer chamber shell; 3. Motor plate; 301. First high-temperature motor; 302. Nitrogen inlet; 303. Sealing gasket; 304. Motor shaft sleeve; 305. Single lip oil seal; 306. Pad; 4. Wind guide cover; 401. Centrifugal wind wheel; 5. Axial flow wind wheel; 501. Ring; 502. Block; 503. Slot; 504. Electric push rod ; 505, connecting ring; 6, adjusting plate; 7, first rotating rod; 701, first rotating groove; 8, supporting plate; 801, limiting groove; 802, sliding block; 803, first tooth portion; 804, second tooth portion; 805, first gear; 806, second high-temperature motor; 807, second gear; 9, second rotating rod; 901, second rotating groove; 10, second driving mechanism; 11, heating wire; 1101, ceramic terminal board; 1102, cover plate; 1103, heat-resistant wire; 1104, fixing frame; 1105, fixing ring. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Example 1

[0043] In order to solve the problem that the nitrogen injected from the upper part of the reflow furnace in the traditional equipment cannot be evenly diffused into the entire furnace body, and the high temperature and high pressure in the reflow furnace will cause resistance to the nitrogen injection, embodiment 1 is proposed;

[0044] See also Figure 1-Figure 9 , comprising a reflow furnace shell 1, a heating furnace support shell 2 is arranged on the reflow furnace shell 1, a heating furnace shell 201 is arranged on the heating furnace support shell 2, an air inlet 202 and a rectifier plate 203 are arranged on the heating furnace shell 201, and a plurality of air outlet holes 204 arranged in a grid are opened on the rectifier plate 203;

[0045] The reflow furnace housing 1 is provided with a motor plate 3 and a heating wire 11. The motor plate 3 is provided with a first high-temperature motor 301. The first high-temperature motor 301 is provided with a nitrogen inlet 302 for introducing nitrogen into the air inlet 202. The heating wire 11 is used to heat the nitrogen.

[0046] A diffusion mechanism is provided in the heating furnace shell 201 for diffusing the heated nitrogen into the heating furnace shell 201 and outputting it through a plurality of air outlets 204 for welding. The diffusion mechanism includes an air guide hood 4 provided in the heating furnace shell 201. A centrifugal fan wheel 401 is rotatably provided in the air guide hood 4, and the centrifugal fan wheel 401 is connected to the motor shaft of the first high-temperature motor 301.

[0047] A buffer chamber shell 205 is also provided on the heating furnace support shell 2, and both ends of the buffer chamber shell 205 are respectively connected to the heating furnace support shell 2 and the heating furnace shell 201, and the buffer chamber shell 205 is used to store buffer nitrogen;

[0048] An auxiliary air supply mechanism is provided in the buffer chamber shell 205, and the auxiliary air supply mechanism includes an axial flow fan wheel 5 provided in the buffer chamber shell 205, and the axial flow fan wheel 5 drives the nitrogen in the buffer chamber shell 205 to enter the heating furnace shell 201 by rotating;

[0049] The motor plate 3 is connected to the reflow furnace housing 1 through a sealing gasket 303. The reflow furnace housing 1 is provided with a motor shaft sleeve 304 and a single lip oil seal 305. The motor shaft sleeve 304 is connected to the heating furnace housing 201.

[0050] The motor shaft of the first high temperature motor 301 is located in the motor shaft sleeve 304 and the single lip oil seal 305 , and a plurality of pads 306 are arranged on the motor plate 3 .

[0051] In this embodiment: wherein, the reflow furnace shell 1 is a partial structure of the reflow furnace, a heating furnace support shell 2 is installed on the reflow furnace shell 1, a heating furnace shell 201 is installed on the heating furnace support shell 2, an air inlet 202 is arranged at the rear end of the heating furnace shell 201, a heating wire 11 is arranged in the heating furnace shell 201 for heating nitrogen, and a rectifier plate 203 is installed at the front end of the heating furnace shell 201.

[0052] The rectifier plate 203 can be made of aluminum to ensure stable temperature and evenly distribute small holes, so that hot air with nitrogen can reach the PCB board to be welded, and the air volume and nitrogen of all small holes are uniform, which can meet the best welding effect. The size of the air inlet 202 is appropriate, which can make the air duct more reasonable and greatly improve the safety compared with the completely open air inlet.

[0053] A sealing gasket 303 is installed at the rear end of the reflow furnace housing 1, a motor plate 3 is fixed at the rear end of the sealing gasket 303, a first high-temperature motor 301 is fixed at the rear end of the motor plate 3, and the motor shaft of the first high-temperature motor 301 passes through the motor shaft sleeve 304 and the single-lip oil seal 305 to enter the heating furnace housing 201. One end of the nitrogen inlet 302 is opened outside the motor plate 3, and can be connected to the nitrogen joint seal for providing nitrogen, and the other end of the nitrogen inlet 302 is opened inside the sealing gasket 303.

[0054] The sealing gasket 303 and the motor shaft sleeve 304 are used to form a sealed space to prevent nitrogen leakage. The sealing gasket 303 is made of a high temperature resistant sealing material. The plurality of cushions 306 play a heat insulation effect, preventing high temperature from being transmitted to the first high temperature motor 301, thereby extending the service life of the first high temperature motor 301.

[0055] The nitrogen injected through the nitrogen inlet 302 will pass through the sealing gasket 303 and the motor shaft sleeve 304 and enter the heating furnace shell 201, and then the motor shaft of the first high-temperature motor 301 will drive the centrifugal wind wheel 401 to rotate in the wind guide cover 4, and the wind generated by the centrifugal wind wheel 401 will flow to the surroundings through the wind guide cover 4, ensuring the hot air pressure inside the furnace and uniform air output.

[0056] In addition, a buffer chamber shell 205 is installed between the heating furnace support shell 2 and the heating furnace shell 201. The buffer chamber shell 205 plays a role in buffering and storing nitrogen. When the injection speed of nitrogen needs to be increased, the axial flow wind wheel 5 can be moved to the air outlet of the air inlet 202 and rotated to generate an air flow blowing toward the heating furnace shell 201. At this time, according to Bernoulli's principle, the wind pressure at the air inlet 202 is high and the pressure is low, which will cause the buffered nitrogen in the buffer chamber shell 205 to be squeezed into the heating furnace shell 201 by the pressure difference.

[0057] Example 2

[0058] In order to drive the axial flow wind wheel 5 to move to the air inlet 202 and connect it to the motor shaft of the first high temperature motor 301, and drive it with the centrifugal wind wheel 401 by the same power, thereby saving operating costs, and the operation of the axial flow wind wheel 5 is optional, embodiment 2 is proposed;

[0059] This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 2-Figure 9 The auxiliary air supply mechanism also includes a collar 501 disposed on the motor shaft of the first high-temperature motor 301, a plurality of blocks 502 are disposed on the axial flow fan wheel 5, a plurality of slots 503 are opened on the collar 501, and the plurality of slots 503 are respectively matched with the plurality of blocks 502;

[0060] The auxiliary air supply mechanism further comprises two electric push rods 504 symmetrically arranged on the heating furnace shell 201 , the telescopic rods of the two electric push rods 504 are provided with connecting rings 505 , and the axial flow impeller 5 is rotatably arranged on the connecting rings 505 .

[0061] In this embodiment: two electric push rods 504 are symmetrically installed at the rear end of the heating furnace shell 201, and the telescopic rods of the two electric push rods 504 are movable and penetrate the rear inner wall of the heating furnace shell 201 and remain sealed. A connecting ring 505 is fixed to the front end of the telescopic rods of the two electric push rods 504, and the axial flow wind wheel 5 is rotatably installed on the connecting ring 505. Four clamping blocks 502 are evenly fixed at the front end of the axial flow wind wheel 5. A collar 501 is fixed on the motor shaft of the first high-temperature motor 301, and four clamping grooves 503 are correspondingly provided at the rear end of the collar 501.

[0062] After the first high temperature motor 301 is rotated and adjusted, the two electric push rods 504 operate synchronously to drive the axial flow fan wheel 5 to move forward, so that the plurality of blocks 502 are plugged into the plurality of slots 503, and then when the first high temperature motor 301 operates again, the axial flow fan wheel 5 will be driven to rotate.

[0063] Example 3

[0064] In the conventional nitrogen injection equipment of the reflow furnace, the flow direction of the nitrogen cannot be adjusted up, down, left, and right according to the actual forging requirements. Therefore, Embodiment 3 is proposed.

[0065] This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 2-Figure 8 , a plurality of air outlet holes 204 are rotatably provided with adjustment plates 6, a first airflow adjustment mechanism and a first driving mechanism are provided on the heating furnace shell 201, and the first driving mechanism is used to drive the plurality of adjustment plates 6 to rotate about the longitudinal central axis;

[0066] The first airflow adjustment mechanism includes a plurality of first rotating rods 7 longitudinally rotatably arranged on the rectifying plate 203, and two first rotating grooves 701 are symmetrically provided on the plurality of adjustment plates 6 along the transverse central axis, and the plurality of first rotating grooves 701 are respectively adapted to the plurality of first rotating rods 7;

[0067] The first driving mechanism comprises a support plate 8 arranged on the heating furnace shell 201, the support plate 8 is provided with a limiting groove 801, a slider 802 is slidably arranged in the limiting groove 801, and the slider 802 is provided with a first tooth portion 803 and a second tooth portion 804;

[0068] A first gear 805 is disposed on each of the first rotating rods 7 at the bottom, and each of the first gears 805 is meshed with the second toothed portion 804;

[0069] The first driving mechanism further includes a second high temperature motor 806 disposed on the support plate 8 . The second high temperature motor 806 is provided with a second gear 807 , and the second gear 807 is meshed with both the first gear portion 803 and the second gear portion 804 .

[0070] In this embodiment, the adjusting plates 6 are rotatably installed in the plurality of air outlet holes 204 arranged in a grid, and the adjusting plates 6 can be rotated in the left-right axis direction or the up-down axis direction. The same number of first rotating rods 7 as the number of adjusting plates 6 are rotatably installed in the cavity of the rectifying plate 203 based on the plurality of adjusting plates 6, and the two first rotating rods 7 adjacent to each other are fixed to each other.

[0071] A first rotation groove 701 is provided on both the upper and lower sides of the adjustment plate 6, a support plate 8 is fixed on the heating furnace shell 201, a limiting groove 801 is provided at the front end of the support plate 8, a slider 802 slides left and right along the limiting groove 801, and a first tooth portion 803 and a second tooth portion 804 are respectively provided on the front and rear inner walls of the limiting groove 801 which are in the form of an annular ring.

[0072] A first gear 805 is fixed to the first rotating rods 7 at the bottom that movably pass through the lower end of the rectifying plate 203, and the first gears 805 are meshed with the second gear 804. A second gear 807 is fixed to the motor shaft of the second high temperature motor 806, and the second gear 807 is a half gear.

[0073] When the first rotating rods 7 are respectively inserted into the first rotating grooves 701, the second high temperature motor 806 drives the second gear 807 to rotate, and the second gear 807 can drive the slider 802 to move back and forth by intermittently and alternately meshing with the first gear portion 803 and the second gear portion 804.

[0074] The operation of the second high temperature motor 806 can drive the first rotating rods 7 to rotate synchronously via the transmission of the adjustment plates 6, so that the nitrogen output through the air outlet holes 204 can be adjusted in the left and right directions.

[0075] Example 4

[0076] In order to adjust the nitrogen gas outputted through the plurality of air outlet holes 204 in the vertical direction, embodiment 4 is proposed;

[0077] This embodiment is an improvement made on the basis of embodiment 3. For details, please refer to Figure 2-Figure 8 The heating furnace shell 201 is also provided with a second airflow adjustment mechanism and a second driving mechanism 10, and the second driving mechanism 10 is used to drive a plurality of adjustment plates 6 to rotate about a transverse central axis;

[0078] The second airflow adjustment mechanism includes a plurality of second rotating rods 9 which are laterally rotatably arranged on the rectifying plate 203. Two second rotating grooves 901 are symmetrically provided on the plurality of adjustment plates 6 along the longitudinal central axis, and the plurality of second rotating grooves 901 are respectively matched with the plurality of second rotating rods 9.

[0079] The second driving mechanism 10 has the same structure as the first driving mechanism.

[0080] In this embodiment: in the cavity of the rectifying plate 203, second rotating rods 9 of the same number as the adjusting plates 6 are rotatably installed based on a plurality of adjusting plates 6, and two adjacent second rotating rods 9 are fixed to each other.

[0081] When the second high temperature motor 806 is operated to rotate the plurality of adjustment plates 6 until their surfaces are vertical, the adjustment plates 6 are further rotated in the vertical direction to disengage the first rotating rod 7 from the first rotating groove 701 , while the second rotating rod 9 is connected to the second rotating groove 901 .

[0082] A second rotation groove 901 is provided on both sides of the adjustment plate 6. The second driving mechanism 10 has the same structure as the first driving mechanism, and is also driven by a high-temperature motor to synchronously rotate the plurality of adjustment plates 6 along the up and down directions, so that the nitrogen output through the plurality of air outlets 204 can be adjusted in the up and down directions.

[0083] Example 5

[0084] In order to heat the nitrogen gas entering the heating furnace shell 201, embodiment 5 is proposed;

[0085] This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 2-Figure 8 The heating mechanism includes two heating wires 11 disposed in a heating furnace housing 201, a ceramic terminal board 1101 is disposed on the heating furnace housing 201, and the two heating wires 11 are connected to the ceramic terminal board 1101;

[0086] A cover plate 1102 is provided on the heating furnace shell 201, a heat-resistant wire 1103 is provided on the cover plate 1102, and the heat-resistant wire 1103 is connected to the ceramic terminal board 1101;

[0087] The heating mechanism further includes a fixing frame 1104 disposed in the heating furnace shell 201 . A plurality of fixing rings 1105 are disposed on the fixing frame 1104 , and two heating wires 11 are disposed on the plurality of fixing rings 1105 .

[0088] In this embodiment, the heat-resistant wire 1103 supplies power to the ceramic terminal board 1101, so that the two heating wires 11 are heated to generate heat, so that the temperature in the heating furnace shell 201 reaches the set value and remains constant at the set value. The fixing frame 1104 and a plurality of fixing rings 1105 are used to fix the two heating wires 11.

[0089] The electrical connection method among the heat-resistant wire 1103 , the ceramic terminal board 1101 and the two heating wires 11 is a working principle well known to those skilled in the art and will not be elaborated on herein.

[0090] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0091] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A nitrogen inlet furnace device, comprising a reflow furnace housing (1), Features: A heating furnace support shell (2) is arranged on the reflow furnace shell (1), a heating furnace shell (201) is arranged on the heating furnace support shell (2), an air inlet (202) and a rectifier plate (203) are arranged on the heating furnace shell (201), and a plurality of air outlet holes (204) arranged in a grid are opened on the rectifier plate (203); The reflow furnace housing (1) is provided with a motor plate (3) and a heating wire (11); the motor plate (3) is provided with a first high-temperature motor (301); the first high-temperature motor (301) is provided with a nitrogen inlet (302) for introducing nitrogen into the air inlet (202); and the heating wire (11) is used to heat the nitrogen; A diffusion mechanism is provided in the heating furnace shell (201) for diffusing the heated nitrogen into the heating furnace shell (201) and outputting it through a plurality of the air outlet holes (204) for welding, the diffusion mechanism comprising an air guide hood (4) provided in the heating furnace shell (201), a centrifugal wind wheel (401) being rotatably provided in the air guide hood (4), and the centrifugal wind wheel (401) being connected to the motor shaft of the first high-temperature motor (301); A buffer chamber shell (205) is also provided on the heating furnace support shell (2), and two ends of the buffer chamber shell (205) are respectively connected to the heating furnace support shell (2) and the heating furnace shell (201), and the buffer chamber shell (205) is used to store buffer nitrogen; An auxiliary air supply mechanism is provided in the buffer chamber shell (205), the auxiliary air supply mechanism comprising an axial flow fan (5) provided in the buffer chamber shell (205), the axial flow fan (5) driving the nitrogen in the buffer chamber shell (205) to enter the heating furnace shell (201) at an accelerated speed by rotating; wherein a plurality of the air outlet holes (204) are each provided with an adjustment plate (6) for rotation; a first airflow adjustment mechanism and a first driving mechanism are provided on the heating furnace shell (201); the first driving mechanism is used to drive the plurality of the adjustment plates (6) to rotate about a longitudinal central axis; The first airflow adjustment mechanism comprises a plurality of first rotating rods (7) longitudinally rotatably arranged on the rectifying plate (203), two first rotating grooves (701) being symmetrically provided on the plurality of adjustment plates (6) along a transverse central axis, and the plurality of first rotating grooves (701) are respectively matched with the plurality of first rotating rods (7); The heating furnace shell (201) is also provided with a second airflow adjustment mechanism and a second driving mechanism (10), wherein the second driving mechanism (10) is used to drive a plurality of the adjustment plates (6) to rotate about a transverse central axis; The second airflow adjustment mechanism comprises a plurality of second rotating rods (9) which are arranged on the rectifying plate (203) in a transversely rotatable manner, and a plurality of the adjustment plates (6) are provided with two second rotating grooves (901) symmetrically along the longitudinal center axis, and the plurality of the second rotating grooves (901) are respectively matched with the plurality of the second rotating rods (9); The second driving mechanism (10) has the same structure as the first driving mechanism.

2. A nitrogen gas entering furnace device according to claim 1, Features: The motor plate (3) is connected to the reflow furnace housing (1) via a sealing gasket (303); a motor shaft sleeve (304) and a single-lip oil seal (305) are provided on the reflow furnace housing (1); and the motor shaft sleeve (304) is connected to the heating furnace shell (201); The motor shaft of the first high-temperature motor (301) is located in the motor shaft sleeve (304) and the single-lip oil seal (305), and a plurality of pads (306) are provided on the motor plate (3).

3. A nitrogen gas entering furnace device according to claim 1, Features: The auxiliary air supply mechanism also includes a collar (501) arranged on the motor shaft of the first high-temperature motor (301), a plurality of clamping blocks (502) are arranged on the axial flow fan wheel (5), a plurality of clamping grooves (503) are opened on the collar (501), and the plurality of clamping grooves (503) are respectively matched with the plurality of clamping blocks (502).

4. A nitrogen gas entering furnace device according to claim 1, Features: The auxiliary air supply mechanism further comprises two electric push rods (504) symmetrically arranged on the heating furnace shell (201), the telescopic rods of the two electric push rods (504) being provided with connecting rings (505), and the axial flow impeller (5) being rotatably arranged on the connecting rings (505).

5. The nitrogen gas entering furnace device according to claim 1, Features: The first driving mechanism comprises a support plate (8) arranged on the heating furnace shell (201), the support plate (8) being provided with a limiting groove (801), a sliding block (802) being slidably arranged in the limiting groove (801), and the sliding block (802) being provided with a first tooth portion (803) and a second tooth portion (804); A plurality of the first rotating rods (7) located at the bottom are each provided with a first gear (805), and the plurality of the first gears (805) are each meshed with the second toothed portion (804).

6. A nitrogen gas entering furnace device according to claim 5, Features: The first driving mechanism further comprises a second high-temperature motor (806) arranged on the support plate (8), a second gear (807) being arranged on the second high-temperature motor (806), and the second gear (807) being meshed with both the first gear portion (803) and the second gear portion (804).

7. The nitrogen gas entering furnace device according to claim 1, Features: The heating mechanism comprises two heating wires (11) arranged in the heating furnace shell (201); a ceramic terminal board (1101) is arranged on the heating furnace shell (201); and the two heating wires (11) are both connected to the ceramic terminal board (1101); A cover plate (1102) is provided on the heating furnace shell (201), a heat-resistant wire (1103) is provided on the cover plate (1102), and the heat-resistant wire (1103) is connected to the ceramic terminal board (1101).

8. A nitrogen gas entering furnace device according to claim 7, Features: The heating mechanism further comprises a fixing frame (1104) arranged in the heating furnace shell (201), a plurality of fixing rings (1105) being arranged on the fixing frame (1104), and the two heating wires (11) are arranged on the plurality of fixing rings (1105).

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