Quick-opening vacuum heating furnace

Abstract

The utility model relates to a quick-opening vacuum heating furnace and belongs to the technical field of heating furnaces. Comprising an inner cylinder, the periphery of the inner cylinder is wound with a heating piece in a full-length mode, the inner cylinder is sleeved with a housing, the inner cylinder and the housing are coaxially arranged, and the opening end of the housing is aligned with the opening end of the inner cylinder; a quick-opening type cabin door is arranged at the opening end of the cover shell and can open or close the cover shell so as to open or close the inner cylinder; the heating piece is used for heating the inner cylinder so as to heat the workpiece; a gap is formed between the inner wall of the housing and the outer wall of the inner cylinder, a vacuumizing opening is formed in the housing, the vacuumizing opening is communicated with the gap, and the vacuumizing opening is connected with a vacuumizing device. The device is convenient to operate and convenient to fill, and the efficiency is improved; heat loss is reduced, the heat energy utilization rate is increased, and safety is improved.

Description

Technical Field

[0001] The utility model relates to a quick-opening vacuum heating furnace, belonging to the technical field of heating furnaces. Background Art

[0002] Figure 1 It is an external vacuum furnace structure. The surface of the vacuum furnace cylinder is wrapped with mica wire. After power is turned on, the coil heats the cylinder, and then heats the workpiece inside the cylinder. However, there are the following problems: 1. The insulation effect is not ideal and the energy consumption is high; 2. The furnace door and the cylinder are connected by bolt flanges, and the opening and closing operation time is long, resulting in low efficiency of material removal and feeding; 3. The surface temperature of the cylinder is high during operation, which poses a safety hazard. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a quick-opening vacuum heating furnace for the above-mentioned prior art, which is convenient to operate, easy to fill materials, and improves efficiency; reduces heat loss, improves thermal energy utilization, and improves safety.

[0004] The technical solution adopted by the utility model to solve the above-mentioned problem is: a quick-opening vacuum heating furnace, comprising an inner cylinder, a heating element is wrapped around the outer circumference of the inner cylinder, a cover shell is arranged outside the inner cylinder, the inner cylinder and the cover shell are coaxially arranged and the open end of the cover shell is aligned with the open end of the inner cylinder; a quick-opening door is provided at the open end of the cover shell, and the quick-opening door can open or close the cover shell, and then open or close the inner cylinder; the heating element heats the inner cylinder, and then heats the workpiece; a gap is provided between the inner wall of the cover shell and the outer wall of the inner cylinder, a vacuum port is provided on the cover shell, the vacuum port is communicated with the gap, and the vacuum port is connected to a vacuum device.

[0005] The heating element is a mica wire.

[0006] The quick-opening door comprises a door, a fixing seat is arranged on the door, a hinge seat is arranged on the side of the cover shell, a swing arm is arranged between the fixing seat and the hinge seat, and the swing arm is driven to rotate around the hinge seat to drive the door to open or close.

[0007] A plurality of circumferentially evenly distributed locking units are provided between the edge of the hatch door and the edge of the cover shell, and the locking units are used to lock the hatch door after it is closed.

[0008] The locking unit includes a locking seat, which is fixed to the outer periphery of the cover shell, and locking movable blocks are hinged on the locking seats respectively. Locking grooves are arranged on the bottom surfaces of the locking movable blocks. The locking movable blocks rotate around the hinge points, driving the locking grooves to surround or move away from the edge of the hatch door and the edge of the cover shell that are in contact with each other. A hand wheel is provided on the locking movable block, and the hand wheel shaft is threadedly connected to the locking movable block. The hand wheel is tightened so that the end of the hand wheel shaft pushes the edge of the hatch door to press against the edge of the cover shell, or the end of the hand wheel shaft moves away from the edge of the hatch door.

[0009] Compared with the prior art, the advantages of the utility model are: a quick-opening vacuum heating furnace, in which the inner cylinder can be quickly opened or closed through a quick-opening hatch, which is convenient for filling materials and improves the heating efficiency of the workpiece; the inner cylinder is arranged in a cover shell and the gap between the inner wall of the cover shell and the outer wall of the inner cylinder is evacuated, which, on the one hand, reduces heat loss and improves the utilization rate of thermal energy, and on the other hand, the heated inner cylinder is isolated by the cover shell, which improves safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of an external vacuum furnace;

[0011] Figure 2 This is a cross-sectional view of a quick-opening vacuum heating furnace according to an embodiment of the utility model;

[0012] Figure 3 This is a top view of a quick-opening vacuum heating furnace according to an embodiment of the utility model;

[0013] Figure 4 for Figure 1 Side view of

[0014] In the figure, 1 is a quick-opening door, 1.1 is a fixing seat, 1.2 is a swing arm, 1.3 is a hinged seat, 1.4 is a door, 2 is a hand wheel, 3 is a locking movable block, 4 is a cover, 5 is an inner tube, 6 is a mica wire, 7 is a vacuum port, and 8 is a locking seat. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0016] like Figure 2 , 3As shown in Figure 4, a quick-opening vacuum heating furnace in this embodiment comprises a horizontally arranged inner cylinder 5, and a mica wire 6 is wound around the outer circumference of the inner cylinder 5. A cover shell 4 is arranged outside the inner cylinder 5, and the inner cylinder 5 and the cover shell 4 have an open end and a closed end respectively. The cover shell 4 is coaxially arranged with the inner cylinder 5, and the open end of the cover shell is aligned with the open end of the inner cylinder. A quick-opening hatch 1 is arranged at the open end of the cover shell 4, and the quick-opening hatch 1 can quickly open or close the cover shell 4, and then open or close the inner cylinder 5, so as to facilitate the filling of the workpiece into the inner cylinder. The mica wire 6 after being energized heats the inner cylinder, and then heats the workpiece. There is a gap between the inner wall of the cover shell and the outer wall of the inner cylinder, and a vacuum port 7 is provided at the closed end of the cover shell, and the vacuum port 7 is connected to the gap. The vacuum port 7 is connected to a vacuum device, and the vacuum device vacuums the gap to avoid heat transfer to the outside, reduce heat loss, and improve energy utilization. After heating is completed, the quick-opening hatch 1 is controlled to open, and then the workpiece is loaded and unloaded.

[0017] The quick-opening door 1 comprises a door 1.4, a fixed seat 1.1 is arranged on the door 1.4, a hinge seat 1.3 is arranged on the side of the cover 4, a swing arm 1.2 is arranged between the fixed seat 1.1 and the hinge seat 1.3, one end of the swing arm 1.2 is fixed to the fixed seat 1.1, and the other end of the swing arm 1.2 is hinged to the hinge seat 1.3, and the swing arm 1.2 is pulled so that the swing arm 1.2 rotates around the hinge seat 1.3, driving the door 1.4 to open or close. Four circumferentially evenly distributed locking units are arranged between the edge of the door and the edge of the opening end of the cover, and the locking units lock the closed door.

[0018] The locking unit includes a locking seat 8, which is fixed to the outer periphery of the cover 4. The locking movable block 3 is hinged on the locking seat 8. The bottom surface of the locking movable block 3 is provided with a locking groove. The locking movable block 3 can rotate around the hinge seat to drive the locking groove to surround or move away from the edge of the hatch door and the edge of the cover. The locking movable block 3 is provided with a hand wheel 2, and the rotating shaft of the hand wheel 2 passes through the locking movable block 3, and the hand wheel rotating shaft is threadedly connected with the locking movable block. When the hatch closes the opening end of the cover, the locking movable block is turned around the hinge point to rotate so that the locking groove surrounds the edge of the hatch door and the edge of the cover; the hand wheel is tightened so that the end of the hand wheel rotating shaft pushes the outer edge of the hatch door to the outer edge of the cover, thereby locking the hatch door and the cover; when the workpiece is heated, the hand wheel is loosened so that the end of the hand wheel rotating shaft is away from the outer edge of the hatch door, and the locking movable block is turned around the hinge point to rotate in the opposite direction, so that the hatch door is easy to open.

[0019] The present application can quickly open or close the inner cylinder through a quick-opening door, which makes filling of materials convenient and improves the heating efficiency of the workpiece; the inner cylinder is arranged in the cover shell and the gap between the inner wall of the cover shell and the outer wall of the inner cylinder is evacuated, which on the one hand reduces heat loss and improves the utilization rate of thermal energy, and on the other hand the heated inner cylinder is isolated by the cover shell, which improves safety.

[0020] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A quick-opening vacuum heating furnace, characterized in that: It comprises an inner cylinder, a heating element is wrapped around the outer circumference of the inner cylinder, a cover shell is arranged outside the inner cylinder, the inner cylinder and the cover shell are coaxially arranged, and the open end of the cover shell is aligned with the open end of the inner cylinder; a quick-opening door is provided at the open end of the cover shell, and the quick-opening door can open or close the cover shell, and then open or close the inner cylinder; the heating element heats the inner cylinder, and then heats the workpiece; a gap is provided between the inner wall of the cover shell and the outer wall of the inner cylinder, a vacuum port is provided on the cover shell, the vacuum port is communicated with the gap, and the vacuum port is connected to a vacuum device.

2. A quick-opening vacuum heating furnace according to claim 1, characterized in that: The heating element is a mica wire.

3. The quick-opening vacuum heating furnace according to claim 1, characterized in that: The quick-opening door comprises a door, a fixing seat is arranged on the door, a hinge seat is arranged on the side of the cover shell, a swing arm is arranged between the fixing seat and the hinge seat, and the swing arm is driven to rotate around the hinge seat to drive the door to open or close.

4. The quick-opening vacuum heating furnace according to claim 3, characterized in that: A plurality of circumferentially evenly distributed locking units are provided between the edge of the hatch door and the edge of the cover shell, and the locking units are used to lock the hatch door after it is closed.

5. The quick-opening vacuum heating furnace according to claim 4, characterized in that: The locking unit includes a locking seat, which is fixed to the outer periphery of the cover shell, and locking movable blocks are hinged on the locking seats respectively. Locking grooves are arranged on the bottom surfaces of the locking movable blocks. The locking movable blocks rotate around the hinge points, driving the locking grooves to surround or move away from the edge of the hatch door and the edge of the cover shell that are in contact with each other. A hand wheel is provided on the locking movable block, and the hand wheel shaft is threadedly connected to the locking movable block. The hand wheel is tightened so that the end of the hand wheel shaft pushes the edge of the hatch door to press against the edge of the cover shell, or the end of the hand wheel shaft moves away from the edge of the hatch door.

Images