Automatic vacuum preheating furnace

Abstract

An automatic vacuum preheating furnace comprises a furnace box, a vacuum extraction device used to evacuate the furnace box, a transporting device located inside the furnace box and used to transport materials, two opposite end of the furnace box have an opening respectively, an automatic sealing door is located on the opening, the automatic vacuum preheating furnace further includes preheating devices, each preheating devices includes a blasting device which is located under the furnace box and connected with the furnace box, and a wind returning device which is located upon the furnace box and connected with the furnace box, each blasting device includes a heating unit and a wind adjusting unit. Each wind adjusting unit includes wind boards, the wind boards are movably connected with two opposite sidewalls of the furnace box through hinges, the wind boards are multiple, and axes of the hinges of the wind boards are parallel to each other, and located on a same plane, the plane is parallel to a bottom of the furnace box. The structure of the automatic vacuum preheating furnace can vacuum preheat the materials the materials efficiently before vacuum drying.

Claims

1. An automatic vacuum preheating furnace, comprising a furnace box (10), a vacuum extraction device used to evacuate the furnace box (10), a transporting device (20) located inside the furnace box (10) and used to transport materials, two opposite ends of the furnace box (10) having an opening (11) respectively, an automatic sealing door (12) being located at each of the openings (11), wherein the automatic vacuum preheating furnace further includes preheating devices (30), each preheating device (30) includes a blasting device (310) which is located under the furnace box (10) and connected with the furnace box (10), and a wind returning device (320) which is located above the furnace box (10) and connected with the furnace box (10), each blasting device (310) includes a heating unit (311) and a wind adjusting unit (313), wherein each wind adjusting unit (313) includes wind boards (314), the wind boards (314) are movably connected with two opposite sidewalls of the furnace box (10) through hinges (317), the wind boards (314) are multiple, and axes of the hinges (317) of the wind boards (314) are parallel to each other, and located on a same plane, the plane is parallel to a bottom of the furnace box (10).

2. The automatic vacuum preheating furnace as set forth in claim 1, wherein each heating unit 311 includes electric heating pipes (312) located on/below the wind board (314), and the electric heating pipes (312) are all parallel to the bottom of the furnace box (10).

3. The automatic vacuum preheating furnace as set forth in claim 2, wherein each electric heating pipe (312) has a bottom layer and a top layer, the bottom layer and the top layer are both parallel to the bottom of the furnace box (10) and located at the bottom of the furnace box (10).

4. The automatic vacuum preheating furnace as set forth in claim 1, wherein each blasting device (310) is connected with the furnace box (10) through a wind inlet (315), a portion of the bottom of the furnace box (10) corresponding to the wind inlet (315) has a plurality of through openings (11).

5. The automatic vacuum preheating furnace as set forth in claim 1, wherein an exit of the wind returning device (320) is connected with an entrance of the blasting device (310).

6. The automatic vacuum preheating furnace as set forth in claim 1, wherein the automatic vacuum preheating furnace has multiple sets of the preheating devices (30), and the preheating devices (30) are located along a transporting direction of the transporting device (20).

7. The automatic vacuum preheating furnace as set forth in claim 1, wherein the automatic vacuum preheating furnace further includes a plurality of wind guide separators (316) located below the wind boards (314), the wind boards (314) are located above portions between two adjacent wind guide separators (316).

8. The automatic vacuum preheating furnace as set forth in claim 1, wherein the transporting device (20) includes a plurality of first gears (22) located in the furnace box (10), the first gears (22) are driven by a motor.

9. The automatic vacuum preheating furnace as set forth in claim 8, wherein the first gears (22) are coaxial with first chain wheels (23) and fixed with the chain wheels (23), the transporting device (20) further includes a plurality of second gears (24) located in the furnace box (10), the second gears (24) are coaxial with second chain wheels (25) and fixed with the second chain wheels (25), the second chain wheels (25) are driven by the chain wheels (23) through a motor.

10. An automatic vacuum preheating furnace, comprising a furnace box (10), a vacuum extraction device used to evacuate the furnace box (10), a transporting device (20) located inside the furnace box (10) and used to transport materials, two opposite ends of the furnace box (10) having an opening (11) respectively, an automatic sealing door (12) being located at each of the opening (11), wherein the automatic vacuum preheating furnace further includes preheating devices (30), each preheating device (30) includes a blasting device (310) which is located under the furnace box (10) and connected with the furnace box (10), and a wind returning device (320) which is located above the furnace box (10) and connected with the furnace box (10), each blasting device (310) includes a heating unit (311) and a wind adjusting unit (313), wherein the automatic vacuum preheating furnace further includes a plurality of wind guide separators (316) located below the wind boards (314), the wind boards (314) are located above portions between two adjacent wind guide separators (316).

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is an isometric view of an automatic vacuum preheating furnace of the present invention.

(2) FIG. 2 is an isometric view of a transporting device of the present invention.

(3) FIG. 3 is an isometric view of a bottom of a furnace box of the present invention.

(4) FIG. 4 is an assembled isometric view of a wind guide separator of the present invention.

(5) FIG. 5 is an isometric view of a wind board of the present invention.

DESCRIPTION OF EMBODIMENTS

(6) Referring to FIG. 1, an automatic vacuum preheating furnace includes a furnace box 10, a vacuum extraction device used to evacuate the furnace box 10, a transporting device 20 located inside the furnace box 10 and used to transport materials, and preheating devices 30, two opposite ends of the furnace box 10 have one opening 11 respectively. The vacuum extraction device can only be a vacuum pump, or can be composed of vacuum pump and filter, or vacuum pump and roots pump, and the filter can be dry ice filter or oil filter, in one exemplary embodiment, the vacuum extraction device is composed of vacuum pump and oil filter. The transporting device 20 can be a conveyer belt, a conveyer roller, or a material car, the material car is driven by gears located inside the furnace box 10, a bottom of the material car has rack. In an exemplary embodiment, the transporting device 20 can be the material car having rack located at the bottom of the material car, the material car is driven by the gears located inside the furnace box 10. An automatic sealing door 12 is located on one opening 11, each preheating device 30 includes a blasting device 310 which is located under the furnace box 10 and connected with the furnace box 10, and a wind returning device 320 which is located upon the furnace box 10 and connected with the furnace box 10, the blasting device 310 includes a heating unit 311 and a wind adjusting unit 313. An exit of the wind returning device 320 is connected with an entrance of the blasting device 310. The automatic vacuum preheating furnace has multiple sets of preheating devices 30, and the preheating devices 30 are located along a transporting direction of the transporting device 20.

(7) Referring to FIGS. 1 and 3, the blasting device 310 can be connected with the furnace box 10 through wind inlets 315, a portion of the bottom of the furnace box 10 corresponding to the wind inlets 315 has a plurality of through openings 11.

(8) Referring to FIGS. 1 and 4, a bottom of each wind board 314 has a plurality of wind guide separators 316, the wind boards 314 are located above portions between two adjacent wind guide separators 316 respectively.

(9) Referring to FIGS. 1 and 5, the wind adjusting unit 313 includes the wind boards 314, the wind boards 314 are movably connected with two opposite sidewalls of the furnace box 10 through hinges 317, the wind boards 314 can be multiple, and axes of the hinges 317 of the wind boards 314 are parallel to each other, and located on the same plane, the plane is parallel to the bottom of the furnace box 10. Each heating unit 311 includes electric heating pipes 312 located on/below the wind board 314, the electric heating pipes 312 are multiple, and the electric heating pipes 312 are all parallel to the bottom of the furnace box 10. Each electric heating pipe 312 has a bottom layer and a top layer, the bottom layer and the top layer are both parallel to the bottom of the furnace box 10 and located at the bottom of the furnace box 10.

(10) Referring to FIG. 2, the transporting device 20 includes first gears 22 which are driven by a motor. The first gears 22 are coaxial with first chain wheels 23 and fixed with the first chain wheels 23, the transporting device 20 further includes second gears 24 located in the furnace box 10, the second gears 24 are coaxial with second chain wheels 25 and fixed with the second chain wheels 25, the second chain wheels 25 are driven by the first chain wheels 23 through a chain 625.

(11) It must be pointed out that, the example embodiments have been described hereinabove, however the invention is not limited to the above example embodiments. Various modifications to and departures from the disclosed example embodiments will occur to those having ordinary skill in the art. The subject matter that is intended to be within the spirit of this disclosure is set forth in the following claims.