Annealing furnace for hot galvanizing

Abstract

The utility model relates to an annealing furnace for hot galvanizing, and relates to the technical field of galvanizing equipment, the annealing furnace comprises an annealing furnace body, a placing plate is arranged at a furnace mouth of the annealing furnace body, a conveying assembly used for conveying the placing plate into the annealing furnace body is arranged on one side of the annealing furnace body, and a gas collecting hood is arranged at the top in the annealing furnace body; a heat exchange box is arranged on one side of the annealing furnace body, a plurality of heat exchange pipes are arranged in the heat exchange box, a communicating pipe is arranged between the heat exchange box and the annealing furnace body, one end of the communicating pipe is fixedly connected and communicated with the heat exchange box, the other end of the communicating pipe penetrates through the side wall of the annealing furnace body and is communicated to the top of the gas collecting hood, and an induced draft fan is installed on the communicating pipe. A scraping mechanism used for scraping zinc dross attached to the heat exchange pipe is arranged on the heat exchange pipe, and the bottom of the heat exchange box communicates with a collecting assembly used for collecting the zinc dross. The zinc slag collecting and cleaning device has the effect of conveniently collecting and cleaning the zinc slag.

Description

Technical Field

[0001] The present application relates to the technical field of galvanizing equipment, and in particular to an annealing furnace for hot-dip galvanizing. Background Art

[0002] Before the workpiece enters the hot-dip galvanizing tank, it will be annealed in an annealing furnace. Annealing is a process that slowly heats the metal to a certain temperature, keeps it for a sufficient time, and then cools it at an appropriate rate. The purpose is to reduce residual stress, stabilize the size, reduce deformation and crack tendency, and eliminate structural defects.

[0003] The annealing furnace includes a furnace body and a furnace nose connected to the furnace body. During the processing, in order to maintain the sealed atmosphere in the annealing furnace, the end of the furnace nose will extend into the hot-dip galvanizing tank and be immersed in the zinc liquid.

[0004] The hot-dip galvanizing tank heats the molten zinc when in use. After being heated, part of the molten zinc will evaporate into zinc vapor. After the zinc vapor enters the furnace nose, it condenses on the inner wall of the furnace nose to form zinc slag. The zinc slag falls on the surface of the workpiece and affects the galvanizing effect of the workpiece. As a result, the operator needs to manually clean the zinc slag inside the furnace nose after stopping the machine, which reduces the galvanizing efficiency. Utility Model Content

[0005] In order to facilitate the collection and cleaning of zinc slag, the present application provides an annealing furnace for hot-dip galvanizing.

[0006] The present application provides a hot-dip galvanizing annealing furnace adopts the following technical solution:

[0007] An annealing furnace for hot-dip galvanizing, comprising an annealing furnace body, a placement plate is provided at the furnace mouth of the annealing furnace body, a conveying assembly for conveying the placement plate to the inside of the annealing furnace body is provided on one side of the annealing furnace body, an air collecting hood is provided on the top of the annealing furnace body, a heat exchange box is provided on one side of the annealing furnace body, a plurality of heat exchange tubes are provided in the heat exchange box, a connecting pipe is provided between the heat exchange box and the annealing furnace body, one end of the connecting pipe is fixedly connected to and communicated with the heat exchange box, the other end of the connecting pipe passes through the side wall of the annealing furnace body and is connected to the top of the air collecting hood, an induced draft fan is installed on the connecting pipe, a scraping mechanism is provided on the heat exchange tube for scraping zinc slag attached to the heat exchange tube, and a collecting assembly for collecting zinc slag is connected to the bottom of the heat exchange box.

[0008] By adopting the above technical solution, the workpiece is placed on the placement plate, and then the workpiece is transported to the annealing furnace body for annealing through the conveying assembly. Before annealing, the induced draft fan can be started in advance. At this time, most of the zinc vapor in the annealing furnace body will enter the heat exchange box through the connecting pipe of the gas collecting hood. Then, cold water is introduced into the heat exchange tube to solidify the zinc vapor when it is cold, and the zinc slag solidified on the heat exchange tube is cleaned by the scraping mechanism at the same time, so that the solidified zinc slag and the cleaned zinc slag can fall along the heat exchange box and be concentrated in the collection assembly, thereby reducing the occurrence of zinc vapor condensing on the inner wall of the annealing furnace body to form zinc slag, and facilitating the collection and cleaning of the zinc slag.

[0009] Optionally, the conveying assembly includes an insulation board, the placement board is fixedly connected to the upper end of the insulation board, the lower end of the insulation board is rotatably connected to multiple pairs of pulleys, a driving motor for driving the pulleys to rotate is provided between the same pair of pulleys, and the driving motor is fixedly connected to the lower end of the insulation board.

[0010] By adopting the above technical solution, the pulley can be driven to rotate by the driving motor, so that the heat insulation board drives the placement board into the annealing furnace body, and the heat conducted to the driving motor is isolated by the heat insulation board.

[0011] Optionally, a slide rail for limiting the sliding direction of the pulley is provided at the lower end of the pulley, and the pulley is slidably connected to the slide rail.

[0012] By adopting the above technical solution, the sliding direction of the pulley can be limited by the slide rail, thereby improving the stability of the pulley when driving the insulation board to move.

[0013] Optionally, the scraping mechanism includes a mounting ring slidably connected to the heat exchange tube, the heat exchange tube is placed in the mounting ring, the mounting ring is provided with an annular scraper arranged along the end surface of the mounting ring, the tip of the annular scraper abuts against the outer wall of the heat exchange tube, the mounting ring is provided with a locking assembly for fixing the annular scraper to the mounting ring, and the heat exchange box is provided with a control assembly for controlling the movement of the mounting ring along the length direction of the heat exchange tube.

[0014] By adopting the above technical solution, the mounting ring can be driven by the control component to move along the length direction of the heat exchange tube, so that the annular scraper can scrape the outer wall of the heat exchange tube during the movement of the mounting ring.

[0015] Optionally, the control component includes a hydraulic cylinder and a connecting plate, the connecting plate is fixed between two adjacent mounting rings, the hydraulic cylinder is fixed to the upper end of the heat exchange box, the piston rod of the hydraulic cylinder passes through the side wall of the heat exchange box and is fixed to the connecting plate, and the extension and retraction direction of the hydraulic cylinder is parallel to the length direction of the heat exchange tube.

[0016] By adopting the above technical solution, the extension and retraction of the hydraulic cylinder can be controlled so that the hydraulic cylinder drives multiple mounting rings to move synchronously through the connecting rod, thereby driving the annular scraper on the mounting ring to scrape the outer wall of the heat exchange tube.

[0017] Optionally, the locking assembly includes a plurality of locking bolts, wherein the locking bolts pass through the annular scraper and are threadedly connected to the mounting ring, and the locking bolts are threadedly connected to the annular scraper.

[0018] By adopting the above technical solution, the locking bolt can be rotated to disengage the rod of the locking bolt from the annular scraper, thereby canceling the fixation of the annular scraper on the mounting ring, and the annular scraper can be replaced regularly.

[0019] Optionally, an annular groove is provided on the mounting ring and arranged along the end surface of the mounting ring, and the annular scraper is placed in the annular groove.

[0020] By adopting the above technical solution, the position of the annular scraper on the mounting ring can be limited by the annular groove, thereby improving the stability of the annular scraper on the mounting ring.

[0021] Optionally, the collecting assembly includes a collecting box, a waste box is slidably connected to the collecting box, and the upper end of the waste box is opened and communicated with the heat exchange box.

[0022] By adopting the above technical solution, zinc slag can be collected through the waste box, and the waste box can be slid to take the waste box out of the collection box, and the waste box can be cleaned regularly.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The solidified zinc slag and the cleaned zinc slag can fall along the heat exchange box and be concentrated in the collection assembly, thereby reducing the occurrence of zinc vapor condensing on the inner wall of the annealing furnace body to form zinc slag, and facilitating the collection and cleaning of zinc slag;

[0025] 2. By controlling the extension and retraction of the hydraulic cylinder, the hydraulic cylinder can drive multiple mounting rings to move synchronously through the connecting rod, thereby driving the annular scraper on the mounting ring to scrape the outer wall of the heat exchange tube;

[0026] 3. By controlling the extension and retraction of the hydraulic cylinder, the hydraulic cylinder can drive multiple mounting rings to move synchronously through the connecting rod, thereby driving the annular scraper on the mounting ring to scrape the outer wall of the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0028] Figure 2 is a schematic structural diagram of a driving motor according to an embodiment of the present application;

[0029] Figure 3 is a schematic diagram of the structure of the collection component of an embodiment of the present application;

[0030] Figure 4 It is a schematic diagram of the structure of the control component of an embodiment of the present application.

[0031] In the figure, 1. annealing furnace body; 2. placement plate; 3. conveying assembly; 31. heat insulation board; 32. pulley; 33. driving motor; 4. air collecting hood; 5. heat exchange box; 51. heat exchange tube; 52. connecting pipe; 53. induced draft fan; 6. scraping mechanism; 61. mounting ring; 611. annular groove; 612. annular scraper; 613. locking assembly; 6131. ​​locking bolt; 614. control assembly; 6141. connecting plate; 6142. hydraulic cylinder; 7. collecting assembly; 71. collecting box; 72. waste box; 8. slide rail; 9. discharge pipe. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 -Attached Figure 4 , further details of this application are given.

[0033] The embodiment of the present application is: a hot dip galvanizing annealing furnace, referring to Figure 1 The annealing furnace body 1 comprises an annealing furnace body 1, a placement plate 2 is arranged at the furnace mouth of the annealing furnace body 1, and the placement plate 2 is arranged in a rectangular parallelepiped shape. A conveying assembly 3 for conveying the placement plate 2 to the inside of the annealing furnace body 1 is arranged on one side of the annealing furnace body 1.

[0034] Reference Figure 1 and Figure 2 The conveying assembly 3 includes a heat insulation board 31, a placing board 2 is fixedly connected to the upper end of the heat insulation board 31, and pulleys 32 are rotatably connected at the four corners of the lower end of the heat insulation board 31, and the pulleys 32 are arranged opposite to each other. A driving motor 33 for driving the pulleys 32 to rotate is arranged between the same pair of pulleys 32, and the driving motor 33 is fixedly connected to the lower end of the heat insulation board 31, and the output shaft of the driving motor 33 is coaxially arranged and fixedly connected with the pulley 32.

[0035] The driving motor 33 is thus started, and the driving motor 33 can drive the pulley 32 to rotate, so that the heat insulation board 31 drives the placement board 2 to move to one side of the inside of the annealing furnace body 1. At the same time, in order to improve the sliding stability of the pulley 32, a slide rail 8 is provided at the lower end of the pulley 32, one end of the slide rail 8 is placed inside the annealing furnace body 1, and the pulley 32 is slidably connected to the slide rail 8.

[0036] Reference Figure 1 and Figure 3A gas collecting hood 4 is provided at the top of the annealing furnace body 1, and a heat exchange box 5 is provided on one side of the annealing furnace body 1. The heat exchange box 5 is configured as a box body with a sealed upper end and the lower end of the heat exchange box 5 gradually shrinks. A discharge pipe 9 is fixedly connected and connected to the upper part of the heat exchange box 5. A connecting pipe 52 is provided between the heat exchange box 5 and the annealing furnace body 1, one end of the connecting pipe 52 is fixedly connected and connected to the heat exchange box 5, and the other end of the connecting pipe 52 passes through the side wall of the annealing furnace body 1 and is connected to the top of the gas collecting hood 4. An induced draft fan 53 is installed on the connecting pipe 52, and the induced draft fan 53 is installed at the upper end of the annealing furnace body 1.

[0037] A plurality of heat exchange tubes 51 are disposed in the heat exchange box 5 . The heat exchange tubes 51 are configured to be U-shaped, and a water inlet end and a water outlet end of the heat exchange tubes 51 are both disposed outside the heat exchange box 5 .

[0038] Thus, by starting the induced draft fan 53, most of the zinc vapor generated on the workpiece will enter the heat exchange box 5 through the connecting pipe 52 through the gas collecting hood 4, and then cold water will be introduced into the heat exchange tube 51. The cold water will circulate in the heat exchange tube 51, absorb the heat in the heat exchange box 5 during the flow, and solidify the zinc vapor into zinc slag when it is cold.

[0039] In order to facilitate the collection of the solidified zinc slag, the bottom of the heat exchange box 5 is connected to a collection component 7 for collecting the zinc slag.

[0040] The collecting assembly 7 includes a collecting box 71, which is arranged in a long reversed cube shape and has an opening on one side wall in the collecting direction. The lower end of the heat exchange box 5 is fixedly connected and communicated with the upper end of the collecting box 71. A waste box 72 is slidably connected to the opening of the collecting box 71, and the upper end of the waste box 72 is opened and communicated with the heat exchange box 5.

[0041] Thus, the zinc slag can slide into the waste box 72 along the heat exchange box 5, and the zinc slag can be collected by the waste box 72. The waste box 72 can be slid to take the waste box 72 out of the collection box 71, and the waste box 72 can be cleaned regularly.

[0042] Reference Figure 1 , Figure 3 and Figure 4 The heat exchange tube 51 is provided with a scraping mechanism 6 for scraping zinc slag attached to the heat exchange tube 51. The scraping mechanism 6 includes a mounting ring 61 slidably connected to the heat exchange tube 51. Two mounting rings 61 are provided on each heat exchange tube 51, and the heat exchange tube 51 is placed in the mounting ring 61. An annular groove 611 is provided on the lower end surface of the mounting ring 61. The annular groove 611 is coaxially arranged with the mounting ring 61 and the annular groove 611 is arranged along the end surface of the mounting ring 61. An annular scraper 612 is provided in the annular groove 611. The tip of the annular scraper 612 abuts against the outer wall of the heat exchange tube 51. The mounting ring 61 is provided with a locking assembly 613 for fixing the annular scraper 612 on the mounting ring 61.

[0043] The locking assembly 613 includes two locking bolts 6131, which are respectively located on both sides of the mounting ring 61. The rod of the locking bolt 6131 passes through the side wall of the annular groove 611 and the annular scraper 612 in turn and is threadedly connected to the mounting ring 61. The locking bolt 6131 is threadedly connected to the annular scraper 612.

[0044] Then, by rotating the locking bolt 6131 , the rod of the locking bolt 6131 can be separated from the annular scraper 612 , and the annular scraper 612 can be removed from the mounting ring 61 , and then the annular scraper 612 can be replaced.

[0045] The heat exchange box 5 is provided with a control component 614 for controlling the movement of the mounting ring 61 along the length direction of the heat exchange tube 51 .

[0046] The control assembly 614 includes a hydraulic cylinder 6142 and a connecting plate 6141. The connecting plate 6141 is fixedly connected between two adjacent mounting rings 61, and a large-sized connecting plate 6141 for connecting the two rows of connecting plates 6141 is fixedly connected between the two rows of connecting plates 6141. The hydraulic cylinder 6142 is fixedly connected to the upper end of the heat exchange box 5, and the extension direction of the hydraulic cylinder 6142 is parallel to the length direction of the heat exchange tube 51. The piston rod of the hydraulic cylinder 6142 passes through the upper end side wall of the heat exchange box 5 and is fixedly connected to the large-sized connecting plate 6141.

[0047] Therefore, by controlling the extension and retraction of the hydraulic cylinder 6142, the hydraulic cylinder 6142 can drive multiple mounting rings 61 to move synchronously through the connecting plate 6141, and then the annular scraper 612 on the mounting ring 61 scrapes the outer wall of the heat exchange tube 51, so that the scraped zinc slag falls into the collection box 71.

[0048] The implementation principle of the embodiment of the present application is: place the workpiece on the placement plate 2, and then control the drive motor 33 so that the drive motor 33 drives the placement plate 2 to move into the annealing furnace body 1, and then transport the workpiece into the annealing furnace body 1, and then start the annealing furnace body 1 to heat the workpiece.

[0049] Before the annealing furnace body 1 is used, the induced draft fan 53 can be started, and most of the zinc vapor inside the annealing furnace body 1 will enter the heat exchange box 5 through the connecting pipe 52 of the gas collecting hood 4, and then circulate in the heat exchange box 5 along the length direction of the heat exchange tube 51 by passing cold water into the heat exchange tube 51. In this process, the temperature inside the heat exchange box 5 is lowered, and the zinc vapor is solidified on the heat exchange tube 51 when it is cold. Then, by controlling the hydraulic cylinder 6142, the hydraulic cylinder 6142 drives the annular scraper 612 to scrape off the zinc slag solidified on the heat exchange tube 51, so that the solidified zinc slag and the cleaned zinc slag fall along the heat exchange box 5 and are concentrated in the waste box 72 in the collection box 71.

[0050] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An annealing furnace for hot dip galvanizing, comprising an annealing furnace body (1), characterized in that: A placement plate (2) is provided at the furnace mouth of the annealing furnace body (1); a conveying assembly (3) for conveying the placement plate (2) into the interior of the annealing furnace body (1) is provided on one side of the annealing furnace body (1); a gas collecting hood (4) is provided on the top of the annealing furnace body (1); a heat exchange box (5) is provided on one side of the annealing furnace body (1); a plurality of heat exchange tubes (51) are provided in the heat exchange box (5); and a connecting pipe (51) is provided between the heat exchange box (5) and the annealing furnace body (1). 2), one end of the connecting pipe (52) is fixedly connected to and communicated with the heat exchange box (5), the other end of the connecting pipe (52) passes through the side wall of the annealing furnace body (1) and is connected to the top of the gas collecting hood (4), an induced draft fan (53) is installed on the connecting pipe (52), a scraping mechanism (6) for scraping zinc slag attached to the heat exchange tube (51) is provided on the heat exchange tube (51), and the bottom of the heat exchange box (5) is connected to a collecting assembly (7) for collecting zinc slag.

2. The hot dip galvanizing annealing furnace according to claim 1, characterized in that: The conveying assembly (3) comprises a heat insulation plate (31), the placement plate (2) is fixedly connected to the upper end of the heat insulation plate (31), the lower end of the heat insulation plate (31) is rotatably connected to a plurality of pairs of pulleys (32), a driving motor (33) for driving the pulleys (32) to rotate is provided between the same pair of pulleys (32), and the driving motor (33) is fixedly connected to the lower end of the heat insulation plate (31).

3. The annealing furnace for hot dip galvanizing according to claim 2, characterized in that: A slide rail (8) for limiting the sliding direction of the pulley (32) is provided at the lower end of the pulley (32), and the pulley (32) is slidably connected to the slide rail (8).

4. The annealing furnace for hot dip galvanizing according to claim 1, characterized in that: The scraping mechanism (6) comprises a mounting ring (61) slidably connected to the heat exchange tube (51), the heat exchange tube (51) being placed in the mounting ring (61), the mounting ring (61) being provided with an annular scraper (612) arranged along the end surface of the mounting ring (61), the tip of the annular scraper (612) abutting against the outer wall of the heat exchange tube (51), the mounting ring (61) being provided with a locking component (613) for fixing the annular scraper (612) on the mounting ring (61), and the heat exchange box (5) being provided with a control component (614) for controlling the movement of the mounting ring (61) along the length direction of the heat exchange tube (51).

5. The annealing furnace for hot dip galvanizing according to claim 4, characterized in that: The control component (614) comprises a hydraulic cylinder (6142) and a connecting plate (6141); the connecting plate (6141) is fixedly connected between two adjacent mounting rings (61); the hydraulic cylinder (6142) is fixedly connected to the upper end of the heat exchange box (5); a piston rod of the hydraulic cylinder (6142) passes through a side wall of the heat exchange box (5) and is fixedly connected to the connecting plate (6141); and a telescopic direction of the hydraulic cylinder (6142) is parallel to a length direction of the heat exchange tube (51).

6. The annealing furnace for hot dip galvanizing according to claim 4, characterized in that: The locking assembly (613) comprises a plurality of locking bolts (6131), wherein the locking bolts (6131) pass through the annular scraper (612) and are threadedly connected to the mounting ring (61), and the locking bolts (6131) are threadedly connected to the annular scraper (612).

7. The annealing furnace for hot dip galvanizing according to claim 4, characterized in that: An annular groove (611) is provided on the mounting ring (61) and is arranged along the end surface of the mounting ring (61), and the annular scraper (612) is placed in the annular groove (611).

8. The annealing furnace for hot dip galvanizing according to claim 1, characterized in that: The collecting assembly (7) comprises a collecting box (71), a waste box (72) being slidably connected inside the collecting box (71), and an upper end of the waste box (72) being open and connected to the heat exchange box (5).

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