Device for water cooling and gas protection of electrode

Abstract

The utility model discloses a water cooling and gas protection electrode device which comprises an electric furnace cover and a graphite electrode, a mounting groove is formed in the center of the top of the electric furnace cover, the graphite electrode is clamped in the mounting groove, a gas sleeve is arranged on the outer side of the graphite electrode in a sleeved mode, and a water cooling protection sleeve is arranged on the outer side of the middle of the graphite electrode in a sleeved mode. A water-cooling water inlet pipe and a water-cooling water outlet pipe are arranged at the bottom end and the top end of the water-cooling protective sleeve respectively, an inert gas inlet pipe is arranged at the top end of the gas sleeve, and an insulating base plate is arranged at the bottom of the gas sleeve and located on the outer side of the graphite electrode; the utility model has the beneficial effects that the problems of over-high electrode temperature and electrode loss caused by oxygen are solved by a method of adding a water cooling system and isolating direct contact between oxygen and the electrode by using inert gas; a working environment is provided for inert gas through the inert gas pipeline, the graphite sealing disc can slow down the problem of gas leakage of the inert gas, and waste of the inert gas is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrode cooling, in particular to a device for water cooling and gas protecting electrodes. Background Art

[0002] The electric furnace for producing rock wool uses graphite electrodes to melt cold materials and heat and homogenize hot slag. During high-temperature smelting, the temperature of the graphite electrode above the slag is high, and it reacts chemically with the oxygen in the atmosphere of the electric furnace, shortening the service life of the electrode. The electrode temperature above the furnace cover is high, and there is a safety risk of heat leakage in the electrode holder, which affects the normal operation of the holder and peripheral equipment. For this reason, we propose a device for water cooling and gas protection of electrodes. Utility Model Content

[0003] The purpose of the utility model is to provide a water-cooled and gas-protected electrode device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for water-cooling and gas-shielded electrodes, comprising an electric furnace cover and a graphite electrode, a mounting groove is provided at the top center of the electric furnace cover, the graphite electrode is clamped in the mounting groove, an air sleeve is provided on the outer side of the graphite electrode, and a water-cooling protective sleeve is provided on the outer side of the middle part of the graphite electrode, a water-cooling water inlet pipe and a water-cooling water outlet pipe are respectively provided at the bottom and the top of the water-cooling protective sleeve, an inert gas inlet pipe is provided at the top of the air sleeve, and an insulating pad is provided at the bottom of the air sleeve located on the outer side of the graphite electrode.

[0005] Preferably, the gas sleeve comprises an upper sleeve, a connecting tube and a lower sleeve, the upper sleeve is sleeved on the outside of the top end of the graphite electrode, the bottom of the upper sleeve is equidistantly connected to the connecting tube, and the bottom of the connecting tube is integrally connected to the lower sleeve, the lower sleeve is sleeved on the outside of the bottom end of the graphite electrode, and the inner walls of the upper sleeve, the connecting tube and the lower sleeve are equidistantly provided with exhaust ports.

[0006] Preferably, a graphite sealing disk is arranged on the outside of the graphite electrode at the top of the gas casing, and stainless steel bolts are equidistantly arranged at both ends of the graphite sealing disk, and the graphite sealing disk and the gas casing are fixedly connected by the stainless steel bolts.

[0007] Preferably, the inner wall of the water-cooling protective jacket is provided with fixing grooves at equal intervals, and the connecting pipes are fitted and connected in the fixing grooves.

[0008] Preferably, a pressure regulator is installed on the outer side of the inert gas inlet pipe.

[0009] Preferably, a recovery water tank is provided on the outside of the electric furnace cover, the end of the water-cooled outlet pipe is located above the recovery water tank, a filter screen is connected inside the recovery water tank, an L-shaped lifting plate is symmetrically fixedly connected to the top of the recovery water tank, and the end of the L-shaped lifting plate is in contact with the top of the recovery water tank.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The utility model has low cost. The dual effects of water cooling and gas isolation are used to reduce the loss of high temperature and oxygen to the electrode, reduce the number of times to replace the electrode, and reduce the amount and cost of the electrode.

[0012] 2. The utility model is more efficient in cooling the electrode. It uses water cooling to dissipate heat, effectively lowers the electrode temperature, reduces the reaction loss between the electrode and oxygen in the air at high temperature, and increases the service life of the electrode.

[0013] 3. The utility model is safer to use. By adding insulating pads between stainless steel bolts, the risk of leakage can be reduced, the overall safety of the device can be improved, and the addition of a water cooling system can prevent the safety risk of the electrode holder being heated and leaking.

[0014] 4. The utility model effectively reduces the heat radiation of the electrode to the surrounding equipment and pipelines, reduces the replacement frequency and prolongs the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the enlarged view of point A of the utility model;

[0017] Figure 3 This is a schematic diagram of the gas casing connection structure of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the recycling water tank of the utility model.

[0019] In the figure: 1. Electric furnace cover; 2. Graphite electrode; 3. Gas casing; 4. Inert gas inlet pipe; 5. Graphite sealing disk; 6. Stainless steel bolts; 7. Pressure regulator; 8. Water-cooled protective sleeve; 9. Water-cooled water inlet pipe; 10. Water-cooled water outlet pipe; 11. Insulating pad; 12. Upper casing; 13. Connecting pipe; 14. Lower casing; 15. Exhaust port; 16. Recovery water tank; 17. Filter; 18. L-shaped lifting plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 The utility model provides a technical solution: a device for water-cooling and gas-shielded electrodes, comprising an electric furnace cover 1 and a graphite electrode 2. A mounting groove is provided at the top center of the electric furnace cover 1, and the graphite electrode 2 is clamped in the mounting groove. A gas sleeve 3 is provided on the outer side of the graphite electrode 2, and a water-cooling protective sleeve 8 is provided on the outer side of the middle part of the graphite electrode 2. A water-cooling water inlet pipe 9 and a water-cooling water outlet pipe 10 are provided at the bottom and top of the water-cooling protective sleeve 8, respectively. An inert gas inlet pipe 4 is provided at the top of the gas sleeve 3, and an insulating pad 11 is provided at the bottom of the gas sleeve 3 located on the outer side of the graphite electrode 2.

[0022] It should be noted that when cooling the graphite electrode 2, the cold water supply device outside the water-cooling water inlet pipe 9 is connected, and cooling water is introduced into the water-cooling protective sleeve 8 through the water-cooling water inlet pipe 9, so that the cooling water contacts the surface of the graphite electrode 2, and the graphite electrode 2 is quickly cooled. The cold water entering the water-cooling protective sleeve 8 is stored inside the water-cooling protective sleeve 8 from bottom to top, and finally discharged to the recovery water tank 16 through the water-cooling water outlet pipe 10 at the top of the water-cooling protective sleeve 8. The design of the cold water inlet and outlet from bottom to top can prolong the heat transfer time between the graphite electrode 2 and water, realize the effective heat exchange between the graphite electrode 2 and water, and achieve the purpose of cooling the graphite electrode 2. Inert gas can be introduced into the gas sleeve 3 through the inert gas inlet pipe 4, and enters the annular cavity of the upper sleeve 12 and the lower sleeve 14. The connecting pipe 13 is a hollow cavity. The upper sleeve 12, the connecting pipe 13 and the lower sleeve 14 are internally connected. The inert gas entering the interior is blown toward the outer wall of the graphite electrode 2 through the exhaust port 15 to isolate the air and achieve the effect of protecting the graphite electrode 2. The pressure of the introduced inert gas can be adjusted by the pressure regulator 7 to increase the pressure of the nitrogen so that the nitrogen can be discharged outward from the gap around the graphite electrode 2, so that a small amount of mixed air is discharged, which is more conducive to isolating the contact between the air and the graphite electrode 2 and preventing the oxidation of the graphite electrode 2.

[0023] The gas sleeve 3 includes an upper sleeve 12, a connecting pipe 13 and a lower sleeve 14. The upper sleeve 12 is sleeved on the outside of the top of the graphite electrode 2. The bottom of the upper sleeve 12 is equidistantly connected to the connecting pipe 13, and the bottom of the connecting pipe 13 is integrally connected to the lower sleeve 14. The lower sleeve 14 is sleeved on the outside of the bottom end of the graphite electrode 2. The inner walls of the upper sleeve 12, the connecting pipe 13 and the lower sleeve 14 are equidistantly provided with exhaust ports 15.

[0024] A graphite sealing disk 5 is arranged at the top of the gas sleeve 3 on the outside of the graphite electrode 2 , and stainless steel bolts 6 are equidistantly arranged at both ends of the graphite sealing disk 5 . The graphite sealing disk 5 and the gas sleeve 3 are fixedly connected by the stainless steel bolts 6 .

[0025] It should be noted that by providing the graphite sealing disk 5, the graphite sealing disk 5 can alleviate the problem of inert gas leakage and reduce the waste of inert gas. The use of stainless steel bolts 6 and insulating pads 11 can prevent equipment leakage, improve the overall safety of the device, and reduce the risk of use.

[0026] The inner wall of the water-cooling protective jacket 8 is provided with fixed grooves at equal intervals, and the connecting pipe 13 is connected in the fixed groove.

[0027] It should be noted that the connecting tube 13 serves to communicate with the interior of the upper sleeve 12 and the lower sleeve 14. The upper sleeve 12, the connecting tube 13 and the lower sleeve 14 cooperate to allow the inert gas to reach a large area of ​​the outer wall of the graphite electrode 2, thereby better isolating the air from the graphite electrode 2 and avoiding oxidation of the graphite electrode 2.

[0028] A pressure regulator 7 is installed on the outside of the inert gas inlet pipe 4 .

[0029] It should be noted that the pressure of the inert gas introduced can be adjusted by the pressure regulator 7 to increase the pressure of the nitrogen so that the nitrogen can be discharged outward from the gaps around the graphite electrode 2, so that a small amount of entrained air can be discharged, which is more conducive to isolating the contact between the air and the graphite electrode 2 and preventing the oxidation of the graphite electrode 2.

[0030] A recovery water tank 16 is arranged outside the electric furnace cover 1, and the end of the water-cooled outlet pipe 10 is located above the recovery water tank 16. A filter screen 17 is connected inside the recovery water tank 16. An L-shaped lifting plate 18 is symmetrically fixedly connected to the top of the recovery water tank 16, and the end of the L-shaped lifting plate 18 is in contact with the top of the recovery water tank 16.

[0031] It should be noted that cooling water is introduced into the water-cooling protective sleeve 8 through the water-cooling water inlet pipe 9, so that the cooling water contacts the surface of the graphite electrode 2, and the graphite electrode 2 is quickly cooled. The cold water entering the water-cooling protective sleeve 8 is stored in the water-cooling protective sleeve 8 from bottom to top, and is finally discharged to the recovery water tank 16 through the water-cooling water outlet pipe 10 at the top of the water-cooling protective sleeve 8, so that the cold water is infinitely circulated in the water-cooling protective sleeve 8, so as to achieve efficient cooling of the graphite electrode 2, and the cooled water is first introduced into the recovery water tank 16, and the impurities mixed in the water are filtered out by the filter screen 17 in the recovery water tank 16, and the clean water is placed under the filter screen 17, so that it is pumped back to the cold water supply device for re-refrigeration, so as to achieve the purpose of water recycling.

[0032] In summary: The utility model solves the problems of excessive electrode temperature and oxygen loss to the electrode by adding a water cooling system and using an inert gas to isolate the direct contact between oxygen and the electrode. A water cooling inlet pipe, a water cooling outlet pipe and a water cooling protective sleeve are added to form a water cooling system. The bottom-up water inlet and outlet design can extend the heat transfer time between the electrode and water, achieve effective heat exchange between the electrode and water, and achieve the purpose of cooling the electrode. The inert gas pipeline provides a working environment for the inert gas, and the graphite sealing disk can slow down the problem of inert gas leakage and reduce the waste of inert gas. The use of stainless steel bolts and insulating pads can prevent equipment leakage, improve the overall safety of the device, and reduce the risk of use.

[0033] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0035] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water-cooled and gas-shielded electrode device, comprising an electric furnace cover (1) and a graphite electrode (2), wherein a mounting groove is provided at the top center of the electric furnace cover (1), and the graphite electrode (2) is clamped in the mounting groove, characterized in that: The outer side of the graphite electrode (2) is provided with an air sleeve (3), and the outer side of the middle part of the graphite electrode (2) is provided with a water cooling protective sleeve (8), the bottom and top of the water cooling protective sleeve (8) are respectively provided with a water cooling water inlet pipe (9) and a water cooling water outlet pipe (10), the top of the air sleeve (3) is provided with an inert gas inlet pipe (4), and the bottom of the air sleeve (3) is provided with an insulating pad (11) located on the outer side of the graphite electrode (2).

2. A water-cooled and gas-shielded electrode device according to claim 1, characterized in that: The gas sleeve (3) comprises an upper sleeve (12), a connecting pipe (13) and a lower sleeve (14); the upper sleeve (12) is sleeved on the outer side of the top end of the graphite electrode (2); the bottom of the upper sleeve (12) is integrally connected to the connecting pipe (13) at an equal distance; the bottom of the connecting pipe (13) is integrally connected to the lower sleeve (14); the lower sleeve (14) is sleeved on the outer side of the bottom end of the graphite electrode (2); and the inner walls of the upper sleeve (12), the connecting pipe (13) and the lower sleeve (14) are all provided with exhaust ports (15) at equal distances.

3. A water-cooled and gas-shielded electrode device according to claim 1, characterized in that: A graphite sealing disk (5) is arranged on the outside of the graphite electrode (2) at the top of the gas sleeve (3), and stainless steel bolts (6) are arranged equidistantly at both ends of the graphite sealing disk (5). The graphite sealing disk (5) and the gas sleeve (3) are fixedly connected by the stainless steel bolts (6).

4. A water-cooled and gas-shielded electrode device according to claim 2, characterized in that: The inner wall of the water-cooling protective jacket (8) is provided with fixing grooves at equal intervals, and the connecting pipe (13) is connected in the fixing grooves.

5. A water-cooled and gas-shielded electrode device according to claim 1, characterized in that: A pressure regulator (7) is installed on the outer side of the inert gas inlet pipe (4).

6. A water-cooled and gas-shielded electrode device according to claim 1, characterized in that: A recovery water tank (16) is arranged outside the electric furnace cover (1), the end of the water-cooling outlet pipe (10) is located above the recovery water tank (16), a filter screen (17) is connected inside the recovery water tank (16), an L-shaped lifting plate (18) is symmetrically fixedly connected to the top of the recovery water tank (16), and the end of the L-shaped lifting plate (18) is in contact with the top of the recovery water tank (16).

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