Graphite rod electric heating furnace

Abstract

The utility model relates to the field of heat treatment equipment, and discloses a graphite rod electric heating furnace. The graphite rod electric heating furnace comprises a heating furnace body, an outer heating cylinder is installed in the heating furnace body, an electric heating cylinder is installed in the outer heating cylinder, an inner heating cylinder is installed in the electric heating cylinder, and a front mounting ring is slidably connected to the interior of the electric heating cylinder; a plurality of carbon powder tube inserting grooves are formed in the front mounting ring, a plurality of graphite rod inserting grooves are formed in the front mounting ring, carbon powder tubes are fixedly connected to the interiors of the carbon powder tube inserting grooves, and a rear mounting ring is fixedly connected to the other ends, away from the front mounting ring, of the carbon powder tubes; and the surface of the rear mounting ring is fixedly connected with a graphite threaded seat. According to the device, waste heat can be fully utilized during heating, the heating device is protected during use, meanwhile, the contact area is increased through a heating medium, materials can be uniformly heated by rotating the heating furnace, and the heating efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of heat treatment equipment, and specifically relates to a graphite rod electric heating furnace. Background Art

[0002] Due to its high temperature resistance, high resistivity, ease of processing, and lower price than refractory metals, graphite is increasingly sought after by the heat treatment industry as a heating element in vacuum resistance furnaces and protective atmosphere furnaces. Graphite rod electric heating furnaces are typically used for high-temperature heating applications such as melting or heat treatment of materials.

[0003] For example, the patent with announcement number CN220288240U discloses a graphite rod heating device, including a graphite rack, multiple graphite rods, and multiple graphite clamps connected to an external power supply; the graphite clamp is installed outside the furnace body and is used to clamp one end of any two graphite rods, the graphite rack is fixedly installed in the furnace body, and multiple connection holes are opened on the side facing the graphite clamp, the graphite rod is inserted into the furnace body, and one end extending into the furnace body is movably inserted into the connection hole, the graphite clamp includes a graphite electrode plate, two pairs of electrode clamps sliding on one side of the graphite electrode plate, and an adjustment component for adjusting and fixing the relative spacing of each pair of electrode clamps, the two pairs of electrode clamps respectively clamp and fix one end of the two graphite rods, and each pair of electrode clamps has a clamping hole in the middle that matches the contour surface of the graphite rod. The utility model has the following advantages and effects: it is convenient to pull out the graphite rods from the furnace, and there is no need to lengthen the graphite rods.

[0004] However, the graphite rod heating device of the application has a poor heating effect during use. Direct contact between the cylindrical graphite rod and the processed material may cause the graphite rod to be contaminated by the molten material, and separated heating may result in poor heating effect. Utility Model Content

[0005] The purpose of this application is to provide a graphite rod electric heating furnace to solve the problem that the above-mentioned graphite rod heating device has poor heating effect during use, the direct contact of the cylindrical graphite rod with the processing material will cause the graphite rod to be contaminated by the molten material, and the separated heating will lead to poor heating effect.

[0006] The technical solution adopted in this application is as follows: a graphite rod electric heating furnace, comprising a heating furnace, an outer heating tube installed inside the heating furnace, an electric heating tube installed inside the outer heating tube, an inner heating tube installed inside the electric heating tube, a front mounting ring is slidably connected to the interior of the electric heating tube, a plurality of carbon powder tube plug-in grooves are provided inside the front mounting ring, a plurality of graphite rod plug-in grooves are provided inside the front mounting ring, a carbon powder tube is fixedly connected to the interior of the carbon powder tube plug-in groove, the other end of the carbon powder tube away from the front mounting ring is fixedly connected to a rear mounting ring, a graphite threaded seat is fixedly connected to the surface of the rear mounting ring, a graphite rod is threadedly connected to the interior of the graphite threaded seat, an inner slot is provided inside the rear mounting ring, and the inner heating tube is slidably connected to the interior of the inner slot.

[0007] Using this technical solution, the interior of the heating furnace is equipped with three sleeves. The outermost sleeve is the outer heating sleeve, which is filled with the material to be heated. The middle sleeve is the electric heating sleeve, which houses the heating device and heat transfer medium. The innermost sleeve is the inner heating sleeve, which is filled with the material to be heated. The heating medium, carbon powder, is added to the carbon powder tube through the carbon powder tube insertion slot. The graphite threaded seat is internally threaded, and the rear end of the graphite rod has external threads. The graphite rod is inserted into the graphite rod insertion slot and rotated to install it inside the threaded seat. Supplying power to the graphite rod heats the rod, heating the carbon powder around it. After assembly, the entire assembly between the front and rear mounting rings is inserted into the inner surface of the electric heating sleeve. Finally, carbon powder is added to the carbon powder tube, allowing it to fill the interior of the electric heating sleeve and wrap around the graphite rod. Power is then applied to the rod to heat the carbon powder, heating the inner and outer walls of the electric heating sleeve.

[0008] In a preferred embodiment, a carbon powder discharge groove is provided on the rear end surface of the carbon powder tube.

[0009] By adopting the above technical solution, 17) the carbon powder added inside can be discharged through the carbon powder discharge trough and filled in the interior of the electric heating tube and the surface of the graphite rod, thereby increasing the contact area between the material and the graphite rod.

[0010] In a preferred embodiment, the front end of the front mounting ring is fixedly connected to a threaded connection seat, and the front end of the inner heating cylinder is fixedly connected to a threaded mounting seat.

[0011] By adopting the above technical solution, after the front mounting ring is inserted into the interior of the electric heating tube, the heating device can be installed on the threaded mounting seat at the front end of the inner heating tube by rotating the threaded connection seat to fix the heating device.

[0012] In a preferred embodiment, an electric telescopic rod is fixedly installed on the front end of the surface of the heating furnace, and a front top cover is installed on the front end of the electric telescopic rod.

[0013] By adopting the above technical solution, starting the electric telescopic rod can drive the front top cover to move back and forth at the front end of the heating furnace, and the front top cover is used to cover the front end of the heating furnace.

[0014] In a preferred embodiment, a front electrode holder is fixedly mounted inside the front top cover and on the surface of the front mounting ring, and a groove is provided inside the front top cover and on the surface of the threaded connection seat.

[0015] By adopting the above technical solution, when the front top cover is arranged at the front end of the heating furnace, the front electrode holder can be used to contact the front end of the graphite rod.

[0016] In a preferred embodiment, a rear electrode holder is installed at the rear end of the heating furnace and close to the side of the rear mounting ring, a second feeding trough is installed at the rear end of the heating furnace and close to the side of the outer heat cylinder, and a first feeding trough is installed at the rear end of the heating furnace and close to the side of the inner heat cylinder.

[0017] By adopting the above technical solution, the rear electrode holder is used to contact the rear end of the graphite rod, and the heating material in the outer heating tube and the heating material in the inner heating tube can be conveniently added and discharged through the second feeding trough and the first feeding trough.

[0018] In a preferred embodiment, the surface of the heating furnace is rotatably connected to a limit ring, and the bottom end of the limit ring is fixedly connected to a support seat.

[0019] By adopting the above technical solution, the heating furnace as a whole can rotate inside the limiting ring.

[0020] In a preferred embodiment, a first gear is fixedly connected to the surface of the heating furnace, a second gear is meshedly connected to the lower end of the first gear, a rotating shaft is fixedly connected inside the second gear, and a motor is installed on the top end of the rotating shaft.

[0021] By adopting the above technical solution, when the motor is started, the rotating shaft can be driven to rotate, and then the second gear and the first gear can be driven to rotate through the rotating shaft. When the internal material of the heating furnace is heated, the first gear can be used to drive the heating furnace to rotate, and the material inside the heating furnace can be rotated to allow the material to be heated evenly.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0023] In this application, carbon powder is added to the inside of the carbon powder tube, and the carbon powder is filled into the graphite rod wrapped inside the electric heating tube. The graphite rod is energized to heat the carbon powder, and the inner and outer walls of the electric heating tube are heated, thereby heating the materials inside the outer heating tube and the inner heating tube. When the motor is started, the shaft can be driven to rotate, and the second gear and the first gear are driven to rotate through the shaft. When the internal material of the heating furnace is heated, the first gear can be used to drive the heating furnace to rotate, and the material inside the heating furnace can be rotated to allow the material to be heated evenly, thereby improving the heating efficiency. This device can make full use of waste heat during heating, protect the heating device during use, and at the same time use the heating medium to increase the contact area. Rotating the heating furnace allows the material to be heated evenly, thereby improving the heating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the internal structure of a graphite rod electric heating furnace in this application;

[0025] Figure 2 This is a diagram of the heating furnace and some of its adjacent structures in this application;

[0026] Figure 3 This is a schematic diagram of the heating device structure in this application;

[0027] Figure 4 This is a plan view of the internal structure of the heating furnace in this application.

[0028] Markings in the figure: 1. Heating furnace; 2. External heating tube; 3. Electric heating tube; 4. Internal heating tube; 5. Threaded mounting seat; 6. Electric telescopic rod; 7. Limiting ring; 8. First gear; 9. Second gear; 10. Rotating shaft; 11. Motor; 12. Support seat; 13. Front mounting ring; 14. Threaded connection seat; 15. Carbon powder tube plug-in slot; 16. Graphite rod plug-in slot; 17. Carbon powder tube; 18. Rear mounting ring; 19. Carbon powder discharge slot; 20. Graphite threaded seat; 21. Graphite rod; 22. Inner slot; 23. Front top cover; 24. Front electrode seat; 25. Groove; 26. First feeding trough; 27. Second feeding trough; 28. Rear electrode seat. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0030] Example:

[0031] Reference Figure 1-4The heating furnace 1 includes a heating element 1 with an outer heating element 2 mounted inside. An electric heating element 3 is mounted inside the outer heating element 2, and an inner heating element 4 is mounted inside the electric heating element 3. A front mounting ring 13 is slidably connected to the interior of the electric heating element 3. The interior of the front mounting ring 13 defines multiple carbon powder tube insertion slots 15, and multiple graphite rod insertion slots 16. A carbon powder tube 17 is fixedly connected to the carbon powder tube insertion slots 15. The end of the carbon powder tube 17, away from the front mounting ring 13, is fixedly connected to a rear mounting ring 18. A graphite threaded seat 20 is fixedly connected to the surface of the rear mounting ring 18. A graphite rod 21 is threadedly connected to the interior of the graphite threaded seat 20. An inner slot 22 is defined inside the rear mounting ring 18, and the inner heating element 4 is slidably connected to the interior of the inner slot 22. The interior of the heating furnace 1 is equipped with three sleeves. The outermost sleeve 2 is filled with the material to be heated. The middle sleeve 3 is the electric heating element 3, and its interior is used to accommodate the heating device and heat transfer medium. The innermost portion is the inner heating cylinder 4, which is filled with the material to be heated. Before installing the device, the carbon powder tube 17 and graphite rod 21 can be assembled between the front mounting ring 13 and the rear mounting ring 18. The carbon powder tube insertion slot 15 in the front mounting ring 13 is designed to receive the carbon powder tube 17, connecting the front and rear mounting rings 13 and 18. The carbon powder tube insertion slot 15 also allows the addition of heating medium, carbon powder, to the interior of the carbon powder tube 17. The graphite threaded seat 20 is internally threaded, while the rear end of the graphite rod 21 has external threads. The graphite rod 21 is inserted into the graphite rod insertion slot 16 and rotated to install it within the threaded seat 20. Supplying electricity to the graphite rod 21 generates heat, heating the carbon powder surrounding it. Once assembled, the entire device, between the front mounting ring 13 and the rear mounting ring 18, is inserted into the inner heating cylinder 4 inside the electric heating cylinder 3. Finally, add carbon powder to the inside of the carbon powder tube 17, let the carbon powder fill the inside of the electric heating tube 3 and wrap the graphite rod 21, and energize the graphite rod 21 to heat the carbon powder, so that the inner and outer walls of the electric heating tube 3 are heated, and then heat the materials inside the outer heating tube 2 and the inner heating tube 4.

[0032] Reference Figure 3 The rear end surface of the carbon powder tube 17 is provided with a carbon powder discharge groove 19. The carbon powder added to the carbon powder tube 17 can be discharged through the carbon powder discharge groove 19 and filled in the interior of the electric heating tube 3 and the surface of the graphite rod, thereby increasing the contact area between the material and the graphite rod and protecting the graphite rod.

[0033] Reference Figure 1-4The front end of the front mounting ring 13 is fixedly connected to a threaded connection seat 14, and the front end of the inner heating tube 4 is fixedly connected to a threaded mounting seat 5. After the front mounting ring 13 is inserted into the interior of the electric heating tube 3, the threaded connection seat 14 is rotated to install the heating device on the threaded mounting seat 5 at the front end of the inner heating tube 4 to fix the heating device. The threaded mounting seat 5 and the threaded connection seat 14 are set at the front end of the heating device for easy installation.

[0034] Reference Figure 2 and Figure 4 A motorized telescopic rod 6 is fixedly mounted on the front end of the heating furnace 1. A front cover 23 is mounted on the front end of the motorized telescopic rod 6. Front cover 23 is used to mount the graphite electrode assembly. Activating the motorized telescopic rod 6 moves front cover 23 back and forth along the front end of the heating furnace 1, thereby covering the front end of the heating furnace 1.

[0035] Reference Figure 4 A front electrode holder 24 is fixedly mounted inside the front top cover 23 and on the surface of the front mounting ring 13. A groove 25 is formed inside the front top cover 23 and on the surface of the threaded connection seat 14. When the front top cover 23 is placed on the front end of the heating furnace 1, the front electrode holder 24 can contact the front end of the graphite rod 21. The groove 25 is used to accommodate the threaded connection seat 14.

[0036] Reference Figure 4 A rear electrode holder 28 is mounted on the rear end of the heating furnace 1, near the rear mounting ring 18. A second feeding trough 27 is mounted on the rear end of the heating furnace 1, near the outer heat cylinder 2. A first feeding trough 26 is mounted on the rear end of the heating furnace 1, near the inner heat cylinder 4. The rear electrode holder 28 is used to contact the rear end of the graphite rod 21. The heating material in the outer heat cylinder 2 and the heating material in the inner heat cylinder 4 can be easily added and discharged through the second feeding trough 27 and the first feeding trough 26.

[0037] Reference Figure 2 The surface of the heating furnace 1 is rotatably connected to a limit ring 7, and the bottom end of the limit ring 7 is fixedly connected to a support base 12. The heating furnace 1 as a whole can rotate inside the limit ring 7. Two front and rear limit rings 7 are installed on the surface of the heating furnace 1. The support base 12 is used to support the limit rings 7, making the heating furnace 1 more stable during rotation.

[0038] Reference Figure 2The surface of the heating furnace 1 is fixedly connected to a first meshing gear 8, the lower end of the first meshing gear 8 is meshedly connected to a second meshing gear 9, the interior of the second meshing gear 9 is fixedly connected to a rotating shaft 10, and a motor 11 is installed on the top of the rotating shaft 10. When the motor 11 is started, it can drive the rotating shaft 10 to rotate, and then drive the second meshing gear 9 and the first meshing gear 8 to rotate through the rotating shaft 10. When the material inside the heating furnace 1 is heated, the first meshing gear 8 can be used to drive the heating furnace 1 to rotate, rotating the material inside the heating furnace 1, so that the material is heated evenly and the heating efficiency is improved.

[0039] The implementation principle of an embodiment of a graphite rod electric heating furnace of the present application is as follows: three layers of sleeves are installed inside the heating furnace 1, and the outermost layer is the outer heat cylinder 2, the interior of which is filled with the material to be heated. The middle layer is the electric heating cylinder 3, the interior of which is used to install the heating device and the heat transfer medium. The innermost layer is the inner heat cylinder 4, the interior of which is used to fill the material to be heated. Before the device is installed, the carbon powder tube 17 and the graphite rod 21 can be assembled between the front mounting ring 13 and the rear mounting ring 18. The carbon powder tube plug-in groove 15 opened in the front mounting ring 13 is used to plug in the carbon powder tube 17. The carbon powder tube 17 can connect the front mounting ring 13 and the rear mounting ring 18 together. At the same time, the heating medium carbon powder can be added to the interior of the carbon powder tube 17 through the carbon powder tube plug-in groove 15. After the assembly is completed, the entire device between the front mounting ring 13 and the rear mounting ring 18 is inserted into the surface of the inner heat cylinder 4 inside the electric heating cylinder 3.

[0040] Finally, add carbon powder to the inside of the carbon powder tube 17, let the carbon powder fill the inside of the electric heating tube 3 and wrap the graphite rod 21, and energize the graphite rod 21 to heat the carbon powder, so that the inner and outer walls of the electric heating tube 3 are heated, thereby heating the materials inside the outer heating tube 2 and the inner heating tube 4. When the motor 11 is started, it can drive the shaft 10 to rotate, and then drive the second gear 9 and the first gear 8 to rotate through the shaft 10. When the internal material of the heating furnace 1 is heated, the first gear 8 can be used to drive the heating furnace 1 to rotate, and the material inside the heating furnace 1 can be rotated to allow the material to be heated evenly, thereby improving the heating efficiency. This device can make full use of waste heat during heating, protect the heating device when in use, and at the same time use the heating medium to increase the contact area. Rotating the heating furnace allows the material to be heated evenly, thereby improving the heating efficiency.

[0041] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A graphite rod electric heating furnace, comprising a heating furnace (1), characterized in that: An outer heating tube (2) is installed inside the heating furnace (1), an electric heating tube (3) is installed inside the outer heating tube (2), an inner heating tube (4) is installed inside the electric heating tube (3), a front mounting ring (13) is slidably connected to the interior of the electric heating tube (3), a plurality of carbon powder tube plug-in grooves (15) are provided inside the front mounting ring (13), a plurality of graphite rod plug-in grooves (16) are provided inside the front mounting ring (13), a carbon powder tube (17) is fixedly connected to the interior of the carbon powder tube plug-in groove (15), the other end of the carbon powder tube (17) away from the front mounting ring (13) is fixedly connected to the rear mounting ring (18), a graphite threaded seat (20) is fixedly connected to the surface of the rear mounting ring (18), a graphite rod (21) is threadedly connected to the interior of the graphite threaded seat (20), an inner slot (22) is provided inside the rear mounting ring (18), and the interior of the inner slot (22) is slidably connected to the inner heating tube (4).

2. A graphite rod electric heating furnace as claimed in claim 1, characterized in that: A carbon powder discharge trough (19) is provided on the rear end surface of the carbon powder tube (17).

3. A graphite rod electric heating furnace as claimed in claim 1, characterized in that: The front end of the front mounting ring (13) is fixedly connected to a threaded connection seat (14), and the front end of the inner heating cylinder (4) is fixedly connected to a threaded mounting seat (5).

4. A graphite rod electric heating furnace as claimed in claim 1, characterized in that: An electric telescopic rod (6) is fixedly mounted on the front end of the surface of the heating furnace (1), and a front top cover (23) is mounted on the front end of the electric telescopic rod (6).

5. A graphite rod electric heating furnace as claimed in claim 4, characterized in that: A front electrode seat (24) is fixedly mounted inside the front top cover (23) and on the surface of the front mounting ring (13). A groove (25) is provided inside the front top cover (23) and on the surface of the threaded connection seat (14).

6. The graphite rod electric heating furnace according to claim 1, characterized in that: A rear electrode holder (28) is installed at the rear end of the heating furnace (1) and on a side close to the rear mounting ring (18); a second feeding trough (27) is installed at the rear end of the heating furnace (1) and on a side close to the outer heating cylinder (2); and a first feeding trough (26) is installed at the rear end of the heating furnace (1) and on a side close to the inner heating cylinder (4).

7. The graphite rod electric heating furnace according to claim 1, characterized in that: The surface of the heating furnace (1) is rotatably connected to a limit ring (7), and the bottom end of the limit ring (7) is fixedly connected to a support seat (12).

8. The graphite rod electric heating furnace according to claim 1, characterized in that: A first meshing wheel (8) is fixedly connected to the surface of the heating furnace (1); a second meshing wheel (9) is meshedly connected to the lower end of the first meshing wheel (8); a rotating shaft (10) is fixedly connected to the interior of the second meshing wheel (9); and a motor (11) is installed at the top end of the rotating shaft (10).

Images