Well type heating furnace for heat treatment

Abstract

The utility model relates to the technical field of well type heating furnaces, in particular to a heat treatment well type heating furnace. According to the technical scheme, the heating furnace comprises a heating furnace body, a furnace opening is formed in the middle of the upper surface of the heating furnace body, a telescopic stand column is rotationally installed on one side of the outer surface of the heating furnace body, a transverse plate is fixedly connected to the tail end of the telescopic stand column, a lifting furnace cover is fixedly installed on the lower surface of the transverse plate, and a hook is fixedly installed on the lower surface of the lifting furnace cover; a rotating furnace cover is rotatably mounted at the edge of the upper surface of the heating furnace body through a rotating shaft, a telescopic rod is fixedly connected to the side, away from the telescopic stand column, of the lower surface of the transverse plate, and a universal wheel is rotatably mounted at the tail end of the telescopic rod. In the process that a workpiece and a lifting appliance enter the well type heating furnace or move out of the well type heating furnace, the time for opening and exposing the furnace mouth can be greatly shortened, heat loss is reduced, and therefore energy consumption of the well type heating furnace is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pit-type heating furnace technology, specifically a heat treatment pit-type heating furnace. Background Technology

[0002] A pit-type heating furnace is a common industrial furnace used for heat treatment of metal materials. It typically has a cylindrical furnace chamber, resembling a well in shape, hence its name. This type of furnace uses electricity, natural gas, or fuel oil as a heat source, heating the air or protective gas inside the furnace chamber to a specified temperature through heating elements, providing a uniform heating environment for the metal materials. Its advantages include precise temperature control, good heating uniformity, and effective reduction of workpiece deformation and oxidation. It is suitable for various types of metal workpieces, such as shafts and gears, for quenching, tempering, and normalizing heat treatment processes. Furthermore, pit-type heating furnaces are easy to operate, have high production efficiency, and are energy-saving and environmentally friendly, finding wide application in many fields such as machinery manufacturing, automotive industry, and aerospace.

[0003] In current heat treatment pit-type heating furnaces, the furnace opening remains open for extended periods during the process of workpieces and lifting devices entering or leaving the furnace. This results in a significant loss of heat from the furnace interior, increasing energy consumption. To address this issue, we propose a new type of heat treatment pit-type heating furnace. Utility Model Content

[0004] The purpose of this utility model is to provide a heat treatment pit-type heating furnace, which can greatly reduce the time the furnace opening is exposed during the process of workpieces and lifting devices entering or leaving the pit-type heating furnace, thereby reducing heat loss and lowering the energy consumption of the pit-type heating furnace. This solves the problem that in the current heat treatment pit-type heating furnace, when workpieces and lifting devices enter or leave the heating furnace, the furnace opening is in an open state for a long time, resulting in a large amount of heat loss from the heating furnace and increased energy consumption.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a heat treatment well-type heating furnace, comprising a heating furnace body, a furnace opening provided at the middle position of the upper surface of the heating furnace body, a telescopic column rotatably mounted on one side of the outer surface of the heating furnace body, a horizontal plate fixedly connected to the end of the telescopic column, a lifting furnace cover fixedly mounted on the lower surface of the horizontal plate, a hook fixedly mounted on the lower surface of the lifting furnace cover, a rotating furnace cover rotatably mounted at the edge of the upper surface of the heating furnace body via a rotating shaft, and a telescopic rod fixedly connected to the side of the lower surface of the horizontal plate away from the telescopic column, with a universal wheel rotatably mounted at the end of the telescopic rod.

[0006] Preferably, a number of support legs are fixedly installed in a ring array at equal intervals on the lower surface of the heating furnace body near the edge, with the number of support legs being greater than or equal to three, which serve to fix and support the heating furnace body.

[0007] Preferably, a fixing ring is fixedly installed on the upper surface of the heating furnace body near the edge of the furnace opening, and a first annular sealing groove is provided on the lower surface of the lifting furnace cover near the edge. The first annular sealing groove and the fixing ring are adapted to each other, and the fixing ring is inserted into the first annular sealing groove to seal the gap between the lifting furnace cover and the furnace opening.

[0008] Preferably, the first annular sealing groove is provided with an annular protrusion inside, and the upper surface of the fixing ring is provided with a second annular sealing groove. The annular protrusion and the second annular sealing groove are adapted to each other, and the annular protrusion is inserted into the second annular sealing groove to further seal the furnace opening and the lifting furnace cover.

[0009] Preferably, a hydraulic cylinder is fixedly installed inside the telescopic column, which drives the telescopic column to extend and retract, thereby driving the horizontal plate and the lifting furnace cover to rise and fall.

[0010] Preferably, a positioning hole is provided on the upper surface of the horizontal plate away from the telescopic column, and a positioning rod is fixedly connected to the upper surface of the heating furnace body away from the telescopic column. When the lifting furnace cover descends and covers the furnace opening, the positioning rod is inserted into the positioning hole, which plays a positioning role for the lifting furnace cover.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention, by incorporating a heating furnace body, telescopic columns, a horizontal plate, a lifting furnace cover, a rotating furnace cover, a rotating shaft, hooks, a telescopic rod, and casters, significantly reduces the time the furnace opening is exposed during the process of workpieces and lifting devices entering or exiting the pit-type heating furnace, thereby reducing heat loss and lowering the energy consumption of the pit-type heating furnace. The telescopic columns drive the horizontal plate and the lifting furnace cover to rise and fall. Rotating the telescopic columns causes the lifting furnace cover and the heating furnace body to be misaligned vertically. The lifting device carrying the workpiece is hooked onto the hook, and then the lifting furnace cover is reset and placed over the furnace opening, allowing the lifting device and workpiece to enter the heating furnace body from the furnace opening. The same operation is performed when the lifting device and workpiece are removed from the heating furnace body. After the lifting device and workpiece are removed from the heating furnace body or before entering the heating furnace body, the rotating furnace cover is rotated and temporarily placed over the furnace opening, temporarily sealing the furnace opening to reduce the time the furnace opening is exposed, reduce heat loss, and thus lower the energy consumption of the pit-type heating furnace.

[0013] This invention improves the sealing between the lifting furnace cover and the furnace opening by setting a first annular sealing groove, a fixing ring, a second annular sealing groove, and an annular protrusion. When the lifting furnace cover descends and covers the furnace opening, the fixing ring is inserted into the first annular sealing groove, and the annular protrusion is inserted into the second annular sealing groove, forming a labyrinth sealing structure, thereby improving the sealing between the lifting furnace cover and the furnace opening and reducing the loss of heat from the furnace opening.

[0014] This invention achieves the effect of accurately placing the lifting furnace cover on the furnace opening by setting a positioning hole and a positioning rod. When the lifting furnace cover descends and covers the furnace opening, the positioning rod is inserted into the positioning hole, which plays a role in positioning the lifting furnace cover. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a partial three-dimensional sectional view of the lifting furnace cover of this utility model;

[0017] Figure 3 This utility model Figure 1 A magnified structural diagram of A in the middle;

[0018] Figure 4 This is a partial three-dimensional sectional view of the telescopic column of this utility model.

[0019] Reference numerals in the attached drawings: 1. Rotating furnace cover; 2. Rotating shaft; 3. Telescopic column; 4. Lifting furnace cover; 5. Positioning hole; 6. Furnace opening; 7. Telescopic rod; 8. Caster wheel; 9. Support leg; 10. Heating furnace body; 11. First annular sealing groove; 12. Hook; 13. Annular protrusion; 14. Horizontal plate; 15. Second annular sealing groove; 16. Fixing ring; 17. Positioning rod; 18. Hydraulic cylinder. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. Example 1

[0021] like Figure 1 , Figure 2 and Figure 4As shown, this utility model proposes a heat treatment well-type heating furnace, including a heating furnace body 10. A furnace opening 6 is provided at the middle position of the upper surface of the heating furnace body 10. Lifting tools and workpieces enter or exit the heating furnace body 10 through the furnace opening 6. A telescopic column 3 is rotatably installed on one side of the outer surface of the heating furnace body 10. The telescopic column 3 and the heating furnace body 10 are rotatably connected by a bearing. A hydraulic cylinder 18 is fixedly installed inside the telescopic column 3, driving the telescopic column 3 to extend and retract. A horizontal plate 14 is fixedly connected to the end of the telescopic column 3. A lifting furnace cover 4 is fixedly installed on the lower surface of the horizontal plate 14, located above the furnace opening 6. A hook 12 is fixedly installed on the lower surface of the lifting furnace cover 4 for loading tools. The lifting device of the component is hung on the lifting furnace cover 4 by hook 12. The rotating furnace cover 1 is rotatably installed at the edge of the upper surface of the heating furnace body 10 via rotating shaft 2. The lower surface of the horizontal plate 14 is fixedly connected to the side away from the telescopic column 3, and the end of the telescopic rod 7 is rotatably installed with universal wheel 8. When the lifting furnace cover 4 is moved away from or moved above the furnace opening 6, the length of the telescopic rod 7 is adjusted so that the universal wheel 8 contacts the ground, which supports the horizontal plate 14 and the lifting furnace cover 4. Several support legs 9 are fixedly installed in a ring array at equal intervals near the edge of the lower surface of the heating furnace body 10. The number of support legs 9 is greater than or equal to three, which provides fixed support for the heating furnace body 10.

[0022] In use, the telescopic column 3 drives the horizontal plate 14 and the lifting furnace cover 4 to rise and fall. Rotating the telescopic column 3 causes the lifting furnace cover 4 and the heating furnace body 10 to be misaligned vertically. The lifting device with the workpiece is hung on the hook 12. Then, the lifting furnace cover 4 is reset and placed on the furnace opening 6, allowing the lifting device and workpiece to enter the heating furnace body 10 from the furnace opening 6. The same operation is performed when the lifting device and workpiece are removed from the heating furnace body 10. After the lifting device and workpiece are removed from the heating furnace body 10 or before they enter the heating furnace body 10, the rotating furnace cover 1 is rotated and temporarily placed on the furnace opening 6, which temporarily seals the furnace opening 6, reducing the time the furnace opening 6 is exposed, reducing heat loss, and thus reducing the energy consumption of the heating furnace body 10. Example 2

[0023] like Figures 1-3As shown, the present invention proposes a heat treatment well-type heating furnace. Compared with Embodiment 1, this embodiment further includes a fixing ring 16 fixedly installed on the upper surface of the heating furnace body 10 near the edge of the furnace opening 6, and a first annular sealing groove 11 provided on the lower surface of the lifting furnace cover 4 near the edge. The first annular sealing groove 11 and the fixing ring 16 are adapted to each other. The fixing ring 16 is inserted into the first annular sealing groove 11 to seal the gap between the lifting furnace cover 4 and the furnace opening 6. An annular protrusion 13 is provided inside the first annular sealing groove 11, and a second annular sealing groove 15 is provided on the upper surface of the fixing ring 16. The annular protrusion 13 and the second annular sealing groove 15 are adapted to each other. The annular protrusion 13 is inserted into the second annular sealing groove 15 to further seal the furnace opening 6 and the lifting furnace cover 4.

[0024] In this embodiment, when the lifting furnace cover 4 descends and covers the furnace opening 6, the fixing ring 16 is inserted into the first annular sealing groove 11, and at the same time the annular protrusion 13 is inserted into the second annular sealing groove 15, forming a labyrinth sealing structure, thereby improving the sealing between the lifting furnace cover 4 and the furnace opening 6 and reducing the loss of heat from the furnace opening 6 inside the heating furnace body 10. Example 3

[0025] like Figures 1-3 As shown, the present invention proposes a heat treatment well-type heating furnace. Compared with the first embodiment, this embodiment also includes a positioning insertion hole 5 on the side of the upper surface of the horizontal plate 14 away from the telescopic column 3, and a positioning insertion rod 17 fixedly connected to the side of the upper surface of the heating furnace body 10 away from the telescopic column 3.

[0026] In this embodiment, when the lifting furnace cover 4 descends and covers the furnace opening 6, the positioning rod 17 is inserted into the positioning hole 5, which plays a positioning role for the lifting furnace cover 4, so that the lifting furnace cover 4 accurately covers the furnace opening 6.

[0027] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A heat treatment shaft furnace comprising a furnace body (10), characterized in that: The heating furnace body (10) upper surface middle position is provided with furnace mouth (6), the heating furnace body (10) outer surface one side rotatory mounting has telescopic stand (3), the telescopic stand (3) end fixedly connected with horizontal plate (14), the horizontal plate (14) lower surface fixedly installed with lifting furnace cover (4), the lifting furnace cover (4) lower surface fixedly installed with hook (12), the heating furnace body (10) upper surface edge position is rotatory mounting with rotary furnace cover (1) through rotating shaft (2), the horizontal plate (14) lower surface deviating telescopic stand (3) one side fixedly connected with telescopic link (7), and telescopic link (7) end rotatory mounting has universal wheel (8).

2. A heat treatment furnace of the type defined in claim 1, characterised in that: The heating furnace body (10) lower surface is close to the edge position and is fixedly installed with a plurality of support legs (9) in annular array equidistant.

3. A heat treatment furnace of the type defined in claim 1, characterized in that: The heating furnace body (10) upper surface is close to the edge position of furnace mouth (6) and is fixedly installed with fixed ring (16), and the lower surface of lifting furnace cover (4) is close to the edge position and is provided with first annular sealing groove (11).

4. A heat treatment furnace of the type defined in claim 3, characterised in that: The first annular sealing groove (11) is provided with annular convex (13) inside, and the upper surface of fixed ring (16) is provided with second annular sealing groove (15).

5. A heat treatment furnace of the type described in claim 1, wherein: The telescopic stand (3) is fixedly installed with hydraulic cylinder (18) inside.

6. A heat treating furnace of the type described in claim 1 wherein: The upper surface of horizontal plate (14) deviating telescopic stand (3) one side is provided with positioning insertion hole (5), and the upper surface of heating furnace body (10) deviating telescopic stand (3) one side is fixedly connected with positioning insertion rod (17).

Images