Periodic aluminum brazing furnace

Abstract

The invention provides a periodic aluminum brazing furnace which comprises a feeding section, a preparation chamber, a brazing chamber, a cooling chamber and a discharging section. A first automatic door is arranged at the rear end of the preparation chamber; the rear end of the brazing chamber communicates with the front end of the preparation chamber, a furnace lining is arranged in the brazing chamber, a first furnace door and a second furnace door are arranged at the front end and the rear end of the furnace lining respectively, and a material frame and multiple sets of heating elements are arranged in the furnace lining. The rear end of the cooling chamber is communicated with the front end of the brazing chamber, a cooling water interlayer is arranged in the cooling chamber, and a second automatic door is arranged at the front end of the cooling chamber; the feeding section is provided with a rail, and the rail sequentially extends to the preparation chamber, the brazing chamber, the cooling chamber and the discharging section and penetrates out of the discharging section. The preparation chamber, the brazing chamber and the cooling chamber are designed to be of the integrated sealing structure, the integrated sealing structure is divided into three independent sealing spaces through the brazing chamber furnace door, the furnace door among the three sealing spaces is opened and closed in the sealing environment, energy consumption can be reduced as much as possible, and meanwhile the high-purity nitrogen environment of the brazing section is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial brazing furnaces, and in particular relates to a periodic aluminum brazing furnace. Background Art

[0002] At present, the conventional aluminum brazing furnace consists of an upper muffle sealing section and an open return section to form a mesh belt circulation closed loop. The upper muffle sealing section is composed of a front curtain-type muffle, a brazing heating section muffle, a cooling section muffle and a rear curtain chamber muffle. The open return section is composed of a driven roller, a feeding section, a discharging section, a driven roller, a return roller and an active roller. The mesh belt is driven in the open section. Because the temperature of the heating section muffle is above 600°C, the entire mesh belt must be selected according to the working conditions of the heating section, which leads to a high price of the mesh belt. In addition, the mesh belt is repeatedly heated and cooled during use, which consumes a lot of energy, resulting in high maintenance costs for the mesh belt and the heating muffle in the later stage, and the service life of the mesh belt is limited. At the same time, due to the use of an open return section, the temperature control accuracy in the furnace is low, the furnace temperature is uneven, the heat loss is large, and the nitrogen consumption is large. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a periodic aluminum brazing furnace and a heating and cooling method for overcoming the above problems or at least partially solving or alleviating the above problems.

[0004] The present invention provides a periodic aluminum brazing furnace, comprising: A feeding section, wherein a track is arranged on the feeding section; A preparation room, the preparation room is arranged at the front end of the feeding section, a first automatic door is arranged at the rear end of the preparation room, and a track is arranged in the preparation room; A brazing chamber, wherein the brazing chamber is arranged at the front end of the preparation chamber, the rear end of the brazing chamber is connected to the front end of the preparation chamber, a furnace lining is arranged in the brazing chamber, a first furnace door and a second furnace door are arranged at the front and rear ends of the furnace lining respectively, and a track, a material rack and a plurality of groups of heating elements are arranged in the furnace lining; A cooling chamber, wherein the cooling chamber is arranged at the front end of the brazing chamber, the rear end of the cooling chamber is connected to the front end of the brazing chamber, a cooling water interlayer is arranged in the cooling chamber, a second automatic door is arranged at the front end of the cooling chamber, and a track is arranged in the cooling chamber; A discharging section, which is arranged at the front end of the cooling chamber and is provided with a track; The preparation chamber, the brazing chamber and the cooling chamber are an integrated sealed structure, and the integrated sealed structure is divided into three independent sealed spaces by the first furnace door and the second furnace door.

[0005] The present invention also has the following optional features.

[0006] Optionally, the periodic aluminum brazing furnace further includes a first ferry trolley, which reciprocates on tracks in the feeding section, the preparation chamber, and the brazing chamber.

[0007] Optionally, the periodic aluminum brazing furnace further includes a second ferry trolley, which reciprocates on tracks in the brazing chamber, the cooling chamber and the discharge section.

[0008] Optionally, the periodic aluminum brazing furnace further includes a tooling, wherein the tooling is used to carry brazing materials, and the tooling matches the material rack.

[0009] Optionally, the outer sides of the first furnace door and the second furnace door are respectively provided with anti-retraction cylinders for blocking the tooling, and the first ferry trolley and the second ferry trolley are both provided with ratchets for unlocking backwards.

[0010] Optionally, a first feeding gear is provided on the feeding section, a second feeding gear is provided in the preparation chamber, a third feeding gear is provided in the rear end of the brazing chamber, and a rack is provided on the first ferry trolley, and can engage with the first feeding gear, the second feeding gear and the third feeding gear through the rack.

[0011] Optionally, a first discharging gear is arranged in the front end of the brazing chamber, a second discharging gear is arranged in the cooling chamber, a third discharging gear is arranged on the discharging section, and a rack is arranged on the second ferry trolley, and can engage with the first discharging gear, the second discharging gear and the third discharging gear through the rack.

[0012] Optionally, oxygen analysis detection points are provided in the preparation chamber, the brazing chamber and the cooling chamber.

[0013] Optionally, nitrogen purge pipelines are provided on inner sides of the first automatic door of the preparation chamber and the second automatic door of the cooling chamber.

[0014] Optionally, a fume exhaust system is provided on the brazing chamber.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 2. The periodic aluminum brazing furnace of the present invention arranges the preparation chamber, brazing chamber and cooling chamber as an integrated sealing structure, and the brazing chamber furnace door divides the integrated sealing structure into three independent sealed spaces, so that the furnace doors between the three can be opened and closed in a sealed environment, thereby minimizing energy consumption and ensuring a high-purity nitrogen environment in the brazing section. At the same time, the furnace temperature can be accurately controlled to ensure uniform furnace temperature during brazing, and the use of a transmission mesh belt to transport materials is avoided, and repeated heating and freezing of the mesh belt is avoided, thereby reducing energy consumption and equipment maintenance costs.

[0016] 3. The brazing room is made of high-performance fire-resistant and environmentally friendly materials to ensure the excellent thermal insulation performance of the furnace. The surface temperature rise of the brazing furnace is ≤ 10℃, which effectively reduces the heat storage of the equipment and reduces energy consumption.

[0017] 4. The periodic aluminum brazing furnace of the present invention adopts a segmented design and periodic operation, and the service life of the transmission system is greatly extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the full cross-section structure of the periodic aluminum brazing furnace of the present invention; Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at AA in FIG. Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure at BB in FIG. Figure 4 yes Figure 2 A schematic diagram of a partial enlarged structure of a feeding section and a preparation chamber; Figure 5 yes Figure 2 A schematic diagram of a partial enlarged structure of a brazing chamber; Figure 6 yes Figure 2 A schematic diagram of a partial enlarged structure of a cooling chamber and a discharging section; Figure 7 yes Figure 3 A schematic diagram of the partial enlarged structure of the brazing chamber.

[0019] In the above figure: 1. loading section; 101. first loading gear; 2. track; 3. preparation room; 301. first automatic door; 302. second loading gear; 4. brazing room; 401. third loading gear; 402. first discharging gear; 5. furnace lining; 501. first furnace door; 502. second furnace door; 503. material rack; 504. heating element; 6. cooling chamber; 601. cooling water interlayer; 602. second automatic door; 603. second discharging gear; 7. discharging section; 701. third discharging gear; 8. first ferry trolley; 9. second ferry trolley; 10. tooling; 11. brazing material; 12. nitrogen purge pipeline; 13. smoke exhaust treatment system.

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0021] Example 1 refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , an embodiment of the present invention provides a periodic aluminum brazing furnace, comprising: a feeding section 1, a preparation chamber 3, a brazing chamber 4, a cooling chamber 6, and a discharging section 7; Among them, a track 2 is arranged on the feeding section 1; a preparation chamber 3 is arranged at the front end of the feeding section 1, and a first automatic door 301 is arranged at the rear end of the preparation chamber 3, and the track 2 extends to the preparation chamber 3 and passes through the preparation chamber 3; a brazing chamber 4 is arranged at the front end of the preparation chamber 3, and the rear end of the brazing chamber 4 is connected with the front end of the preparation chamber 3, and a furnace lining 5 is arranged in the brazing chamber 4, and a first furnace door 501 and a second furnace door 502 are respectively arranged at the front and rear ends of the furnace lining 5, and the track 2 passing through the preparation chamber 3 extends to the furnace lining 5 and passes through the furnace lining 5; a material rack 503 and a plurality of heating elements 504 are arranged in the furnace lining 5; a cooling chamber 6 is arranged at the front end of the brazing chamber 4, the rear end of the cooling chamber 6 is communicated with the front end of the brazing chamber 4, a cooling water interlayer 601 is arranged in the cooling chamber 6, a second automatic door 602 is arranged at the front end of the cooling chamber 6, the track 2 passing through the furnace lining 5 extends to the cooling chamber 6, and passes through the cooling chamber 6; a discharging section 7 is arranged at the front end of the cooling chamber 6, the track 2 passing through the cooling chamber 6 extends to the discharging section 7, and passes through the discharging section 7.

[0022] It should be noted that the preparation chamber 3, brazing chamber 4 and cooling chamber 6 of the present invention are an integrated sealed structure, which is divided into three independent sealed spaces by the brazing chamber furnace door. This design ensures that the brazing chamber furnace door is opened in a large sealed environment, ensures a high-purity nitrogen environment in the brazing section, and minimizes energy consumption and exhaust gas emissions.

[0023] Example 2 refer to Figure 1 , Figure 3 , Figure 5 and Figure 6 The periodic aluminum brazing furnace further includes a first ferry trolley 8 and a second ferry trolley 9. The first ferry trolley 8 reciprocates on the track 2 in the feeding section 1, the preparation chamber 3 and the brazing chamber 4. The second ferry trolley 9 reciprocates on the track 2 in the brazing chamber 4, the cooling chamber 6 and the discharging section 7.

[0024] When in use, the first ferry trolley 8 starts to move forward along the track 2 after loading the brazing material 11 in the loading section 1, and the first automatic door 301 at the rear end of the preparation chamber 3 is opened. After the first ferry trolley 8 completely enters the preparation chamber 3, the first automatic door 301 is closed. The first ferry trolley 8 is preheated while moving forward in the preparation chamber 3 along the track 2. When the first ferry trolley 8 enters the rear end of the brazing chamber 4, the first furnace door 501 at the rear end of the furnace lining 5 is opened, and the first ferry trolley 8 enters the furnace lining 5 along the track 2 to leave the brazing material 11 and return along the original route. The first automatic door 301 is closed, and the brazing material 11 is heat treated in the furnace lining 5. After the heat treatment is completed, the second furnace door 502 at the front end of the furnace lining 5 is opened, the second ferry trolley 9 enters the furnace lining 5 backward along the track 2, carrying the brazing material 11 and then forward into the cooling chamber 6, the second furnace door 502 is closed, and after the brazing material 11 is cooled in the cooling chamber 6, the second ferry trolley 9 carries the brazing material 11 and moves forward along the track 2 to the discharging section 7 to wait for unloading.

[0025] Example 3 refer to Figure 4 , Figure 5 and Figure 6 On the basis of Example 2, the periodic aluminum brazing furnace further includes a tool 10 , which is used to carry brazing materials 11 , and the tool 10 matches the material rack 503 .

[0026] The brazing material 11 is fixed on the tooling 10, and the first ferry trolley 8 delivers the tooling 10 from the loading section 1 through the preparation chamber 3 to the material rack 503 of the brazing chamber 4, and then the first ferry trolley 8 withdraws from the brazing chamber 4 along the original route. After the brazing material 11 on the tooling 10 is heat treated on the material rack 503, the second ferry trolley 8 enters the material rack 503 of the brazing chamber 4 and drags the tooling 10 and the brazing material 11 out of the brazing chamber 4 to the cooling chamber 6 for cooling, and then delivers them to the discharging section 7.

[0027] Example 4 On the basis of Example 3, the outer sides of the first furnace door 501 and the second furnace door 502 are respectively provided with anti-retraction cylinders for blocking the tooling 10, and the first ferry trolley 8 and the second ferry trolley 9 are both provided with ratchets for unlocking backwards.

[0028] After the first ferry trolley 8 carries the tooling 10, the tooling 10 is sent forward to the material rack 503 in the brazing chamber 4 through the ratchet, and the anti-retraction cylinder on the outside of the first furnace door 501 extends, the first ferry trolley 8 begins to retreat, the ratchet is unlocked backwards, the first ferry trolley 8 and the tooling 10 begin to separate, and finally the first ferry trolley 8 exits the brazing chamber 4, and the tooling 10 is blocked by the anti-retraction cylinder and remains on the material rack 503. When the second ferry trolley 8 retreats into the material rack 503 in the brazing chamber 4, the ratchet on the second ferry trolley 9 is unlocked backwards, and after the second ferry trolley 9 enters directly under the material rack 503, the second ferry trolley 9 begins to move forward, and the ratchet pushes the tooling 10 forward, so that the tooling 10 is separated from the material rack 503 and completely loaded on the second ferry trolley 9, and finally sent forward out of the brazing chamber 4 and into the cooling chamber 6.

[0029] Example 5 refer to Figure 4 and Figure 5 On the basis of Example 2, a first feeding gear 101 is provided on the feeding section 1, a second feeding gear 302 is provided in the preparation chamber 3, a third feeding gear 401 is provided in the rear end of the brazing chamber 4, and a rack is provided on the first ferry trolley 8, and can engage with the first feeding gear 101, the second feeding gear 302 and the third feeding gear 401 through the rack.

[0030] Since the temperature in the preparation chamber 3 and the brazing chamber 4 is relatively high, it is difficult to install a power device on the first ferry cart 8, so a rack is set on the lower side of the frame of the first ferry cart 8, and the first ferry cart 8 is alternately meshed with the first loading gear 101 on the loading section 1, the second loading gear 302 in the preparation chamber 3 and the third loading gear 401 in the rear end of the brazing chamber 4 through the rack. The first loading gear 101, the second loading gear 302 and the third loading gear 401 are all connected to the external motor transmission through a rotating shaft, and are driven to rotate by the external motor, thereby driving the first ferry cart 8 to move.

[0031] Example 6 refer to Figure 5 and Figure 6 On the basis of Example 2, a first discharging gear 402 is arranged in the front end of the brazing chamber 4, a second discharging gear 603 is arranged in the cooling chamber 6, a third discharging gear 701 is arranged on the discharging section 7, and a rack is arranged on the second ferry trolley 9, which can mesh with the first discharging gear 402, the second discharging gear 603 and the third discharging gear 701 through the rack.

[0032] Since the temperature in the brazing chamber 4 and the cooling chamber 6 is relatively high, it is difficult to install a power device on the second ferry cart 9, so a rack is set on the lower side of the frame of the second ferry cart 9, and the second ferry cart 9 is alternately meshed with the first discharging gear 402 in the rear end of the brazing chamber 4, the second discharging gear 603 in the cooling chamber 6, and the third discharging gear 701 on the discharging section 7 through the rack. The first discharging gear 402, the second discharging gear 603 and the third discharging gear 701 are all connected to the external motor transmission through a rotating shaft, and are driven to rotate by the external motor, thereby driving the second ferry cart 9 to move.

[0033] Example 7 On the basis of Example 1, oxygen analysis detection points are provided in the preparation chamber 3 , the brazing chamber 4 and the cooling chamber 6 .

[0034] Each oxygen analysis and detection point is connected to a high-precision oxygen concentration online monitoring system, which can measure the furnace atmosphere in real time and accurately.

[0035] Example 8 refer to Figure 1 , Figure 4 and Figure 6 On the basis of Example 1, a nitrogen purge pipeline 12 is provided on the inner side of the first automatic door 301 of the preparation chamber 3 and the second automatic door 602 of the cooling chamber 6 .

[0036] A nitrogen purge pipeline 12 is arranged around the furnace door of the brazing chamber 4, and a nitrogen air knife is arranged in the first automatic door 301 and the second automatic door 602. When the first automatic door 301 or the second automatic door 602 is opened, the nitrogen air knife is purged and emptied to realize the air sealing function.

[0037] Example 9 refer to Figure 1 and Figure 4 , Figure 5 and Figure 6 On the basis of Example 1, a fume exhaust treatment system 13 is provided on the brazing chamber 4 .

[0038] The exhaust system 13 is used to filter and discharge the gas discharged from the brazing chamber 4. It adopts a conventional filtering and discharging structure and is provided with a filter chamber, an exhaust fan and a pipeline.

[0039] Example 10 On the basis of the above embodiment, the first automatic door 301, the first furnace door 501, the second furnace door 502 and the second automatic door 602 are all made of stainless steel plates, with silicone rubber sealing rings arranged around them, and a lifting system consisting of a cylinder or a motor, a sprocket and a chain, which can be lifted and lowered separately to achieve closing and sealing, and travel switches are arranged on the upper and lower parts for constraint management. After the furnace door is closed in place, the sealing ring is pressed by a mechanical device. A cooling water circulation pipeline is connected to the cooling water clamp 601 of the cooling chamber 6 to cool the cooling chamber 6.

[0040] The shell of the preparation chamber 3 is welded by profiles and steel plates, and the entire furnace shell is designed as a sealed structure. After the preparation furnace door is closed, it is ensured that external air cannot enter the furnace.

[0041] The furnace lining 5 is composed of side wall lining, furnace top lining and furnace bottom lining. The side wall lining and furnace top lining are composed of 100mm thick backing blanket and 300mm 1260 ceramic fiber module to form a 400mm thick insulation layer. The furnace bottom lining is built with high alumina bricks, clay bricks and silica adobe bricks.

[0042] The brazing chamber 6 is divided into five heating zones. The heating elements 504 are arranged on the two side walls and the bottom of the furnace lining 5. All the heating elements 504 are designed to be heated by radiation tubes to ensure the safety and scientificity of the furnace seal. The input power of each heating zone has greater flexibility. A separate power regulator is used to balance the heat demand of each brazing zone. The furnace temperature uniformity is controlled within ±5°C.

[0043] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The components and structures not described in detail in this embodiment are well-known components and common structures or common means in the industry, and are not described here one by one.

Claims

1. A periodic aluminum brazing furnace, characterized in that: include: A feeding section (1), wherein a track (2) is provided on the feeding section (1); A preparation chamber (3), the preparation chamber (3) being arranged at the front end of the loading section (1), a first automatic door (301) being arranged at the rear end of the preparation chamber (3), and the track (2) extending into the preparation chamber (3) and passing through the preparation chamber (3); a brazing chamber (4), wherein the brazing chamber (4) is arranged at the front end of the preparation chamber (3), the rear end of the brazing chamber (4) is connected to the front end of the preparation chamber (3), a furnace lining (5) is arranged in the brazing chamber (4), a first furnace door (501) and a second furnace door (502) are arranged at the front and rear ends of the furnace lining (5), respectively, a track (2) passing through the preparation chamber (3) extends to the furnace lining (5) and passes through the furnace lining (5); a material rack (503) and a plurality of groups of heating elements (504) are arranged in the furnace lining (5); a cooling chamber (6), the cooling chamber (6) being arranged at the front end of the brazing chamber (4), the rear end of the cooling chamber (6) being connected to the front end of the brazing chamber (4), a cooling water interlayer (601) being arranged in the cooling chamber (6), a second automatic door (602) being arranged at the front end of the cooling chamber (6), and a track (2) passing through the furnace lining (5) extending to the cooling chamber (6) and passing through the cooling chamber (6); a discharge section (7), the discharge section (7) being arranged at the front end of the cooling chamber (6), the track (2) passing through the cooling chamber (6) extending to the discharge section (7) and passing through the discharge section (7); The preparation chamber (3), the brazing chamber (4), and the cooling chamber (6) are an integrated sealed structure, and the integrated sealed structure is divided into three independent sealed spaces by the first furnace door (501) and the second furnace door (502).

2. The periodic aluminum brazing furnace according to claim 1, characterized in that: The periodic aluminum brazing furnace further comprises a first ferry trolley (8), which reciprocates on tracks (2) within the loading section (1), the preparation chamber (3) and the brazing chamber (4).

3. The periodic aluminum brazing furnace according to claim 2, characterized in that: The periodic aluminum brazing furnace further comprises a second ferry trolley (9), which reciprocates on the track (2) on the brazing chamber (4), the cooling chamber (6) and the discharge section (7).

4. The periodic aluminum brazing furnace according to claim 1, characterized in that: It also includes a tool (10), wherein the tool (10) is used to carry the brazing material (11), and the tool (10) matches the material rack (503).

5. The periodic aluminum brazing furnace according to claim 3, characterized in that: The outer sides of the first furnace door (501) and the second furnace door (502) are respectively provided with anti-retraction cylinders for blocking the tooling (10), and the first ferry trolley (8) and the second ferry trolley (9) are both provided with ratchets for unlocking backwards.

6. The periodic aluminum brazing furnace according to claim 2, characterized in that: The feeding section (1) is provided with a first feeding gear (101), the preparation chamber (3) is provided with a second feeding gear (302), the rear end of the brazing chamber (4) is provided with a third feeding gear (401), and the first ferry trolley (8) is provided with a rack, which can mesh with the first feeding gear (101), the second feeding gear (302) and the third feeding gear (401) through the rack.

7. The periodic aluminum brazing furnace according to claim 3, characterized in that: A first discharge gear (402) is arranged in the front end of the brazing chamber (4), a second discharge gear (603) is arranged in the cooling chamber (6), a third discharge gear (701) is arranged on the discharge section (7), and a rack is arranged on the second ferry trolley (9), and can mesh with the first discharge gear (402), the second discharge gear (603) and the third discharge gear (701) through the rack.

8. The periodic aluminum brazing furnace according to claim 1, characterized in that: Oxygen analysis detection points are provided in the preparation chamber (3), the brazing chamber (4) and the cooling chamber (6).

9. The periodic aluminum brazing furnace according to claim 1, characterized in that: Nitrogen purge pipelines (12) are provided on the inner sides of the first automatic door (301) of the preparation chamber (3) and the second automatic door (602) of the cooling chamber (6).

10. The periodic aluminum brazing furnace according to claim 1, characterized in that: The brazing chamber (4) is provided with a smoke exhaust processing system (13).

Images