Anti-fracture graphite electrode structure

Abstract

The utility model belongs to the technical field of graphite electrodes, and particularly relates to an anti-fracture graphite electrode structure, which comprises a carbon rod and connecting ends parallelly arranged on two farthest end faces of the carbon rod, the carbon rod comprises two cold ends and a hot end, the cold ends are electrically connected with the connecting ends, and the hot end is clamped between the two cold ends. The jacket and the inclined guide plate are arranged, the jacket and the guide plate can wrap the outer side of the connecting position of the connecting end and the busbar, airflow generated by vortex cannot make direct contact with the connecting end and the busbar, meanwhile, due to the fact that the guide plate is arranged at the inclined angle, the airflow can flow along an inclined radian flow channel of the guide plate, and the airflow can flow through the guide plate. Therefore, the flowing direction of the air flow is changed by the flow guide plate, the situation that the air flow flows back after scouring the busbar is avoided, the blowing corrosion damage of eddy current in the furnace to the carbon rod is further reduced, and the service life of the carbon rod is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of graphite electrodes, and in particular relates to a fracture-resistant graphite electrode structure. Background Art

[0002] Graphite electrodes are made of high-purity graphite powder through processes such as pressing and sintering. Therefore, graphite electrodes can be considered as a kind of carbon rod, usually with a cylindrical shape, used in electric furnace smelting, graphite electrolytic cells and electrochemical reactions. At present, in sintering furnaces, graphite electrodes are usually used as heating elements to provide high temperature to complete the sintering process.

[0003] In the prior art, a bus is usually required to provide conductivity for the carbon rod in a sintering furnace. The specific method is to connect the connecting end to the bus. When current is passed through the cold ends of the two ends of the carbon rod, the hot end can perform resistive heating due to its own high resistance characteristics. However, the heat generated by the hot end will increase the air temperature in the furnace. The hot air has a lower density and will rise upward, while the cold air has a higher density and will sink downward. Therefore, a convection cycle will be formed between the hot air and the cold air, resulting in an eddy current phenomenon, which is specifically manifested in that the gas in the high-temperature area (hot end) is accelerated to flow to the low-temperature area (cold end), so that the airflow will repeatedly scour and erode the connection between the cold end and the bus, causing the contact position between the carbon rod and the bus to become thinner and broken, thereby reducing the service life of the carbon rod. Utility Model Content

[0004] In view of this, the utility model provides a fracture-resistant graphite electrode structure, the purpose of which is to provide a jacket and an inclined guide plate, the jacket and the guide plate can be wrapped around the outside of the connection between the connecting end and the bus, so that the airflow generated by the vortex will not directly contact the connecting end and the bus, and at the same time, because the guide plate is set at an inclined angle, the airflow will follow the inclined arc flow channel of the guide plate, so that the flow direction of the airflow is changed by the guide plate, which helps to avoid the backflow of the airflow after it is flushed to the bus, further reducing the erosion damage to the carbon rod caused by the vortex in the furnace, and extending the service life of the carbon rod.

[0005] The technical solution adopted by the utility model is as follows:

[0006] It includes a carbon rod and connecting ends which are arranged in parallel on the two farthest end surfaces of the carbon rod, the carbon rod includes two cold ends and one hot end, and the cold end is electrically connected to the connecting end, the hot end is sandwiched between the two cold ends, a jacket is provided at the connection between the connecting end and the cold end, and a guide plate is fixedly provided on the side of the jacket away from the cold end, the guide plate is arranged at an inclined angle and forms a conical structure with the jacket.

[0007] As a preferred technical solution, the jacket and guide plate are of a splicable structure, including splicing grooves distributed in a tooth shape and opened from the guide plate to the side of the jacket close to the cold end, and splicing blocks corresponding to the splicing grooves.

[0008] Furthermore, a threaded column is provided at one end of the jacket close to the cold end, and the threaded column is provided in a hollow structure.

[0009] Furthermore, a sleeve is provided at one end of the threaded column that is in contact with the cold end, and the connecting end is wrapped inside the sleeve.

[0010] Furthermore, a docking port parallel to the sleeve opening is provided at the joint of the guide plate.

[0011] Furthermore, a connecting collar is sleeved on the outer wall of the cold end, and a threaded interface is provided on the inner wall of the connecting collar.

[0012] Furthermore, the connecting ring is a splicing structure, including a fixing assembly for splicing and fixing, and the fixing assembly includes a fixing block, a plurality of fixing holes penetrated on the fixing block, and screws and nuts corresponding to the fixing holes.

[0013] Furthermore, the threaded column is threadedly connected to the threaded interface.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] By providing a jacket and an inclined guide plate, the jacket and the guide plate can be wrapped around the outside of the connection between the connecting end and the bus, so that the airflow generated by the vortex will not directly contact the connecting end and the bus. At the same time, since the guide plate is arranged at an inclined angle, the airflow will follow the inclined arc flow channel of the guide plate, so that the flow direction of the airflow is changed by the guide plate, which helps to avoid the backflow of the airflow after it is flushed to the bus, further reducing the erosion damage to the carbon rod caused by the vortex in the furnace and extending the service life of the carbon rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0017] Figure 1 This is a structural schematic diagram of a fracture-resistant graphite electrode structure provided by the utility model;

[0018] Figure 2 It is a structural schematic diagram of the carbon rod provided by the utility model;

[0019] Figure 3 It is a structural schematic diagram of the connecting ring provided by the utility model;

[0020] Figure 4It is a structural schematic diagram of the jacket provided by the utility model;

[0021] Figure 5 The utility model provides Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0022] Carbon rod-1; connecting ring-2; jacket-3; fixing assembly-4; cold end-5; hot end-6; connecting end-7; guide plate-8; threaded interface-9; fixing block-10; fixing hole-11; threaded column-12; sleeve-13; docking interface-14; splicing groove-15; splicing block-16. DETAILED DESCRIPTION

[0023] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1

[0025] In the prior art, in a sintering furnace, a bus is usually required to provide conductivity for the carbon rod. Specifically, the connecting end will be connected to the bus, and when the current is passed through the cold ends of the carbon rods, the hot ends will use their own high resistance characteristics to generate resistive heating. However, due to the heat generated by the hot end, the air temperature in the furnace increases, causing the hot air to rise due to its lower density, while the cold air will sink due to its higher density. Therefore, a convection cycle is formed between the hot air and the cold air, leading to the occurrence of eddy currents. This is specifically manifested in that the gas at the hot end in the high-temperature area accelerates to flow to the cold end in the low-temperature area, so that the airflow repeatedly scours and erodes the connection between the cold end and the bus, causing the contact position between the carbon rod and the bus to gradually become thinner and eventually break. These problems seriously affect the service life of the carbon rod.

[0026] Therefore, in order to solve the problem that the existing carbon rod 1 is affected by the eddy current in the furnace, the contact surface of the carbon rod 1 and the busbar is easily eroded by the eddy current gas, causing the contact position of the carbon rod and the busbar to gradually become thinner and eventually break, thereby reducing the service life of the carbon rod 1, and to achieve the function of blocking the eddy current gas and extending the service life of the carbon rod 1, the utility model discloses a fracture-resistant graphite electrode structure, refer to Figure 1 , Figure 2 , Figure 4 and Figure 5, comprising a carbon rod 1 and connecting ends 7 arranged in parallel on the two farthest end surfaces of the carbon rod 1, the carbon rod 1 comprising two cold ends 5 and a hot end 6, and the cold end 5 is electrically connected to the connecting end 7, the hot end 6 is sandwiched between the two cold ends 5, a jacket 3 is provided at the connection between the connecting end 7 and the cold end 5, and a guide plate 8 is fixedly provided on the side of the jacket 3 away from the cold end 5, the guide plate 8 is arranged at an inclined angle and forms a conical structure with the jacket 3;

[0027] In this embodiment, by providing a jacket 3 and an inclined guide plate 8, the connection between the connecting terminal 7 and the bus can be wrapped in the jacket 3 to achieve a protective effect. At the same time, the guide plate 8 can change the flow direction of the blown gas so that the airflow will not flow back at the connection between the connecting terminal 7 and the bus, thereby avoiding erosion and extending the service life of the carbon rod 1.

[0028] In this embodiment, optionally, the guide plate 8 on the jacket 3 has an inclination angle ranging from 2 to 8 degrees.

[0029] In the present embodiment, preferably, the jacket 3 and the guide plate 8 are spliced ​​structures, including splicing grooves 15 with tooth-like distribution and opened along the guide plate 8 to the side of the jacket 3 close to the cold end 5, and splicing blocks 16 corresponding to the splicing grooves 15. When the connecting terminal 7 is docked with the bus, the unspliced ​​jacket 3 can be spliced ​​and clamped at the connection between the connecting terminal 7 and the bus, so that the connection between the connecting terminal 7 and the bus can be wrapped in the jacket 3, thereby arranging the jacket 3 into a splicing structure to facilitate the disassembly and installation of the jacket 3 on the connecting terminal 7.

[0030] In this embodiment, in order to allow the connecting terminal 7 to be smoothly wrapped inside the jacket 3 , a sleeve 13 is provided at one end of the threaded column 12 that is in contact with the cold end 5 , and the connecting terminal 7 is wrapped inside the sleeve 13 .

[0031] In this embodiment, a docking port 14 parallel to the sleeve port 13 is provided at the joint of the guide plate 8 , and the docking port 14 can be arranged around the connection between the bus bar and the connection terminal 7 .

[0032] Working principle: the jacket 3 and the guide plate 8 can be wrapped around the outside of the connection between the connecting terminal 7 and the bus, so that the airflow generated by the vortex will not directly contact the connecting terminal 7 and the bus. At the same time, since the guide plate 8 is set at an inclined angle, the airflow will follow the inclined arc flow channel of the guide plate 8, so that the flow direction of the airflow is changed by the guide plate 8, which helps to avoid the backflow of the airflow after it is flushed to the bus, further reducing the erosion damage of the vortex in the furnace to the carbon rod 1, and extending the service life of the carbon rod 1.

[0033] When in use: In the initial state, the jacket 3 is split into two halves. When installing the jacket 3, the operator can connect the connecting terminals 7 on both sides of the carbon rod 1 to the ports on the bus respectively, and then wrap the jacket 3 split into two halves around the connection between the connecting terminal 7 and the bus, and then close the two jackets 3 through the splicing block 16 and the splicing groove 15 to completely wrap the connecting terminal 7 and the port of the bus inside, and then rotate the threaded column 12 into the threaded interface 9 of the connecting collar 2 so that the jacket 3 can be fixed on the carbon rod 1.

[0034] Embodiment 2

[0035] On the basis of the first embodiment, in order to stably fix the jacket 3 on the carbon rod 1, refer to Figure 3 , and also includes a connecting ring 2 and a fixing component 4. The fixing component 4 can fix the connecting ring 2 on the cold end 5. Specifically, the connecting ring 2 is a splicing structure, including a fixing component 4 for splicing and fixing. The fixing component 4 includes a fixing block 10, a plurality of fixing holes 11 penetrated on the fixing block 10, and screws and nuts corresponding to the fixing holes 11.

[0036] In this embodiment, by passing the screw through the fixing hole 11 and fixing the screw in the fixing hole 11 with a nut, the fixing blocks 10 on the split connecting collar 2 can be closed to each other, so that the connecting collar 2 can be fixedly sleeved on the cold end 5. When the airflow at the hot end 6 flows toward the cold end 5, the airflow will flow along the connecting collar 2 to the jacket 3, thereby improving the protection effect of the cold end 5.

[0037] In the present embodiment, the connecting ring 2 and the jacket 3 are both anti-fracture structures of the carbon rod 1. By setting the connecting ring 2 and the jacket 3 as a splicable structure, when any of the aforementioned components is damaged, the operator only needs to disassemble and replace the corresponding component, and there is no need to disassemble the entire anti-fracture structure of the carbon rod 1, thereby saving the use cost of the anti-fracture structure.

[0038] In this embodiment, a threaded column 12 is fitted on one end of the jacket 3 close to the cold end 5 , and the threaded column 12 is provided with a hollow structure. When the connecting ring 2 is closed, the operator can make a threaded connection with the threaded column 12 through the threaded interface 9 .

[0039] In this embodiment, preferably, in order to facilitate the removal of the jacket 3 from the connecting collar 2 , the threaded column 12 is threadedly connected to the threaded interface 9 .

[0040] Working principle: The connecting ring 2 can wrap the cold end 5 of the carbon rod 1 so that the cold end 5 will not directly contact the flowing gas generated by the hot end 6. Then the connecting ring 2 can fix the jacket 3 through the threaded interface 9, so that the jacket 3 can be fixed on the carbon rod 1, and it is not easy to fall off or slide from the carbon rod 1 and the bus bar, thereby further improving the stability of the carbon rod 1.

[0041] During use: In the initial state, the connecting ring 2 is split into two half rings. Then, when the carbon rod 1 needs to be installed, the operator can first wrap the split ring 2 around the cold end 5, and then close the fixing plates 10 on the two half rings through screws and nuts, so that the connecting ring 2 can be fixed on the cold end 5, and then connect the connecting end 7 to the port on the bus, and close the jacket 3 according to the steps in Example 1, and finally fix the jacket 3 through the threaded column 12 and the threaded interface 9, so that the anti-fracture structure can be installed on the carbon rod 1.

[0042] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0043] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fracture-resistant graphite electrode structure, comprising a carbon rod (1) and connecting ends (7) arranged in parallel on two farthest end surfaces of the carbon rod (1), characterized in that: The carbon rod (1) comprises two cold ends (5) and a hot end (6), and the cold end (5) is electrically connected to a connecting end (7), and the hot end (6) is sandwiched between the two cold ends (5). A jacket (3) is provided at the connection between the connecting end (7) and the cold end (5), and a guide plate (8) is fixedly provided on the side of the jacket (3) away from the cold end (5), and the guide plate (8) is arranged at an inclined angle and forms a conical structure with the jacket (3).

2. The fracture-resistant graphite electrode structure according to claim 1, characterized in that: The jacket (3) and the guide plate (8) are of a splicable structure, comprising splicing grooves (15) distributed in a toothed shape and opened along the guide plate (8) to the side of the jacket (3) close to the cold end (5), and splicing blocks (16) corresponding to the splicing grooves (15).

3. The fracture-resistant graphite electrode structure according to claim 2, characterized in that: A threaded column (12) is provided on one end of the jacket (3) close to the cold end (5), and the threaded column (12) is provided in a hollow structure.

4. The fracture-resistant graphite electrode structure according to claim 3, characterized in that: The end of the threaded column (12) that is in contact with the cold end (5) is provided with a sleeve (13), and the connecting end (7) is wrapped inside the sleeve (13).

5. The fracture-resistant graphite electrode structure according to claim 2, characterized in that: The joint of the guide plate (8) is provided with a docking port (14) parallel to the sleeve port (13).

6. The fracture-resistant graphite electrode structure according to claim 1, characterized in that: A connecting collar (2) is sleeved on the outer wall of the cold end (5), and a threaded interface (9) is provided on the inner wall of the connecting collar (2).

7. The fracture-resistant graphite electrode structure according to claim 6, characterized in that: The connecting collar (2) is a splicing structure, comprising a fixing assembly (4) for splicing and fixing, wherein the fixing assembly (4) comprises a fixing block (10), a plurality of fixing holes (11) penetrated through the fixing block (10), and screws and nuts corresponding to the fixing holes (11).

8. The fracture-resistant graphite electrode structure according to claim 3, characterized in that: The threaded column (12) is threadedly connected to the threaded interface (9).

Images