Electrode conductive cross arm of LF ladle refining furnace

Abstract

The invention belongs to the technical field of electrode conductive cross arms, and particularly relates to an electrode conductive cross arm of an LF ladle refining furnace. Comprising a cross arm body, a holding jaw and a clamping device are installed on the cross arm body, a cooling water channel and a water return channel are formed in the cross arm body, two cavities are formed in the clamping device, two water cooling channels are formed in the holding jaw, and the water inlet ends and the water outlet ends of the two cavities and the two water cooling channels are communicated with the cooling water channel and the water return channel through pipelines and hoses respectively. The water flow directions in the two cavities are opposite, and the water flow directions in the two water cooling channels are opposite. The clamping jaw and the clamping device can be bidirectionally cooled, the cooling joint of the clamping jaw and the cross arm body is not located on the joint face, the cooling effect is good, cooling is uniform, and therefore the damage that a fixing bolt is fused, and the joint face is pitted is prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of electrode conductive cross arms, and in particular relates to an electrode conductive cross arm of a LF ladle refining furnace. Background Art

[0002] At present, the electrode conductive cross arm used in the LF ladle refining furnace has a single structure. The electrode clamp mouth (copper) is fixed on the cross arm body, and the cooling water inlet and outlet are on the joint surface of the clamp mouth and the cross arm body. The interface is sealed with a high-temperature resistant material sealing ring to prevent leakage of the clamp mouth during the molten steel smelting process.

[0003] In actual applications, due to the high temperature of the equipment operating environment and the vibration generated during the lifting process of the equipment, the sealing ring is easily burned, deformed, and damaged, causing cooling water to leak to the joint surface between the clamp mouth and the cross arm body, causing the conductivity of the clamp mouth to further deteriorate. If it is not handled in time, it is easy to cause the fixing bolts to melt and pitting on the joint surface, which is extremely dangerous. However, due to factors such as the location and weight of the equipment, it cannot be handled quickly.

[0004] In addition, the cooling of the jaws and clamps is usually one-way cooling, that is, the cooling water flows into the inside from one end of the jaws and clamps, and then flows out from the other end. This method has a poor cooling effect, and the jaws and clamps cannot be cooled evenly. Due to the high operating environment temperature, the cooling water temperature is high in the back half of the cooling channel, and the cooling effect is lost. The cooling effect of the back half of the cooling channel can only be improved by increasing the cooling water pressure. However, excessive water pressure will cause water leakage at the cooling pipe interface, which will cause the fixing bolts to melt and pitting on the joint surface. Summary of the invention

[0005] The object of the present invention is to provide an electrode conductive cross arm of an LF ladle refining furnace to solve the problems existing in the prior art.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] An electrode conductive cross arm of an LF ladle refining furnace comprises a cross arm body, a clamping jaw and a clamp are installed on the cross arm body, a cooling water channel and a return water channel are arranged in the cross arm body, two cavities are arranged in the clamp, two water cooling channels are arranged in the clamping jaw, water inlet ends and water outlet ends of the two cavities and the two water cooling channels are respectively connected to the cooling water channel and the return water channel through pipes and hoses, the water flow directions in the two cavities are opposite, and the water flow directions in the two water cooling channels are opposite.

[0008] Furthermore, the cooling water channel and the return water channel are connected to three external threaded tubes, one end of the external threaded tube passes through the cross arm body, the end of the external threaded tube that passes through the cross arm body is in the shape of an external thread, and the external threaded tubes are all connected to the hose.

[0009] Furthermore, the interior of the clamp is hollow, and the interior of the clamp is divided into two cavities by a partition. The water inlet and water outlet of the cavity are respectively located on both sides of the clamp, the water inlet end of the cavity is located at the lower position of the clamp, and the water outlet end of the cavity is located at the upper position of the clamp. The water inlet ends of the two cavities are relatively distributed on both sides of the clamp, and the water outlet ends of the two cavities are relatively distributed on both sides of the clamp.

[0010] Furthermore, the water inlet ends of the two cavities are connected in parallel through pipes and then connected to any one of the three outer wire tubes on the cooling water channel through a hose, and the water outlet ends of the two cavities are connected in parallel through pipes and then connected to any one of the three outer wire tubes on the return water channel through a hose.

[0011] Furthermore, the two water-cooling channels in the clamp mouth are distributed in parallel, and the two water-cooling channels are curved. The water inlet and outlet of the water-cooling channels are connected to the outside from the top of the clamp mouth. The water inlet and outlet of the water-cooling channels are both internally threaded, and the water inlet and outlet of the water-cooling channels are threaded with external thread connectors. The water inlet ends of the two water-cooling channels are connected to the other two of the three external thread tubes on the cooling water channel through external thread connectors and hoses, and the water outlet ends of the two water-cooling channels are connected to the other two of the three external thread tubes on the return water channel through external thread connectors and hoses.

[0012] Furthermore, a split protective cover is welded on the clamping openings of the water inlet end and the water outlet end of the water cooling channel, and the split protective cover is sleeved on the outside of the external thread connector and the hose.

[0013] Furthermore, the split protective cover includes an outer thread cover and an inner thread cover. Both the outer thread cover and the inner thread cover are in the shape of circular tubes. The outer wall of the outer thread cover is in the shape of an outer thread thread, and the inner wall of the inner thread cover is in the shape of an inner thread thread. The inner thread cover is threaded onto the outer thread cover, and the split protective cover is welded to the clamp mouth through the outer thread cover.

[0014] Furthermore, a circular groove is provided on the back of the clamping jaws, the inner wall of the circular groove is in the shape of an internal thread, and a temperature sensor is connected to the internal thread of the circular groove.

[0015] The present invention has the following beneficial effects:

[0016] 1. The present invention can perform bidirectional cooling on the jaws and the clamp, and the cooling connection between the jaws and the cross arm body is not located on the joint surface, so the cooling effect is good and the cooling is uniform, thereby preventing the fixing bolts from melting and pitting on the joint surface.

[0017] 2. The jaws are equipped with two water cooling channels, in which the cooling water flows in opposite directions, thereby achieving two-way cooling of the jaws, making the cooling effect better and more uniform, and without the need for higher water pressure.

[0018] 3. The holder is provided with two cavities, and the cooling water flows in the two cavities in opposite directions, thereby realizing two-way cooling of the holder, making the cooling effect better and more uniform, and without requiring a higher water pressure.

[0019] 4. The split protective cover protects the external thread joint and the hose connection on the clamp mouth to prevent the external thread joint and the hose connection from leaking due to external force.

[0020] 5. The temperature inside the jaws is detected by a temperature sensor. When the temperature rises, the valve opening is adjusted to increase to ensure the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the internal structure of the cross arm body of the present invention.

[0023] Figure 3 It is a schematic diagram of the internal structure of the clamp of the present invention.

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the clamping jaws of the present invention.

[0025] Figure 5 It is a schematic diagram of the connection structure of the split shield of the present invention.

[0026] Figure 6 It is a schematic diagram of the disassembled structure of the clamping jaws and the temperature sensor of the present invention.

[0027] Among them: 1. Cross arm body; 2. Clamp mouth; 3. Clamp; 4. Cooling water channel; 5. Return water channel; 6. Cavity; 7. Water cooling channel; 8. Pipeline; 9. Hose; 10. External thread tube; 11. Partition; 12. External thread connector; 13. External thread cover; 14. Internal thread cover; 15. Temperature sensor; 16. Round groove. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] like Figure 1-6As shown, an electrode conductive cross arm of an LF ladle refining furnace comprises a cross arm body 1, on which a clamping jaw 2 and a clamp 3 are installed, a cooling water channel 4 and a return water channel 5 are arranged in the cross arm body 1, two cavities 6 are arranged in the clamp 3, and two water cooling channels 7 are arranged in the clamping jaw 2. The water inlet ends and the water outlet ends of the two cavities 6 and the two water cooling channels 7 are connected to the cooling water channel 4 and the return water channel 5 respectively through pipes 8 and hoses 9, and the water flow directions in the two cavities 6 are opposite, and the water flow directions in the two water cooling channels 7 are opposite.

[0030] The cooling water channel 4 and the return water channel 5 are connected to three external threaded tubes 10 , one end of the external threaded tube 10 passes through the cross arm body 1 , one end of the external threaded tube 10 passing through the cross arm body 1 is in an external threaded shape, and the external threaded tube 10 is threadedly connected to the hose 9 .

[0031] The interior of the clamp 3 is hollow, and the interior of the clamp 3 is divided into two cavities 6 by a partition 11. The water inlet end and the water outlet end of the cavity 6 are respectively located on both sides of the clamp 3. The water inlet end of the cavity 6 is located at the lower position of the clamp 3, and the water outlet end of the cavity 6 is located at the upper position of the clamp 3. The water inlet ends of the two cavities 6 are relatively distributed on both sides of the clamp 3, and the water outlet ends of the two cavities 6 are relatively distributed on both sides of the clamp 3.

[0032] After the cooling water in the cooling water channel 4 enters the two cavities 6 of the holder 3, it enters at a low level and exits at a high level, and the cooling water flows in the reverse direction and then flows back to the return water channel 5, thereby achieving two-way cooling of the holder 3, making the cooling effect better and more uniform. No high water pressure is required.

[0033] The water inlet ends of the two cavities 6 are connected in parallel through pipes 8 and then connected to any one of the three outer wire tubes 10 on the cooling water channel 4 through a hose 9. The water outlet ends of the two cavities 6 are connected in parallel through pipes 8 and then connected to any one of the three outer wire tubes 10 on the return water channel 5 through a hose 9.

[0034] The two water-cooling channels 7 in the clamp mouth 2 are distributed in parallel, and the two water-cooling channels 7 are curved. The water inlet and outlet ends of the water-cooling channels 7 are connected to the outside from the top of the clamp mouth 2. The water inlet and outlet ends of the water-cooling channels 7 are both internally threaded, and the water inlet and outlet ends of the water-cooling channels 7 are threaded with external thread connectors 12. The water inlet ends of the two water-cooling channels 7 are connected to the other two of the three external thread tubes 10 on the cooling water channel 4 through the external thread connector 12 and the hose 9, and the water outlet ends of the two water-cooling channels 7 are connected to the other two of the three external thread tubes 10 on the return water channel 5 through the external thread connector 12 and the hose 9.

[0035] After the cooling water in the cooling water channel 4 enters the two water cooling channels 7 of the clamping jaw 2, it flows in the reverse direction in the two water cooling channels 7 and then flows back to the return water channel 5, thereby realizing two-way cooling of the clamping jaw 2, making the cooling effect better and more uniform. No high water pressure is required, high-pressure water leakage is prevented, and hazards such as fuse of fixing bolts and pitting of joint surfaces are avoided.

[0036] A split protective cover is welded on the clamping opening 2 at the water inlet end and the water outlet end of the water cooling channel 7 , and the split protective cover is sleeved on the outer side of the external thread connector 12 and the hose 9 .

[0037] The split-type protective cover includes an outer thread cover 13 and an inner thread cover 14. Both the outer thread cover 13 and the inner thread cover 14 are in the shape of round tubes. The outer wall of the outer thread cover 13 is in the shape of outer thread threads, and the inner wall of the inner thread cover 14 is in the shape of inner thread threads. The inner thread cover 14 is threadedly connected to the outer thread cover 13. The split-type protective cover is welded to the clamp mouth 2 through the outer thread cover 13.

[0038] The clamping jaw 2 is located at the working end and clamps the electrode with the clamp 3. Once the external thread connector 12 and the hose 9 on the clamping jaw 2 leak under the action of external force, the water will flow to the joint surface of the clamping jaw 2 and the cross arm body 1, causing pitting damage on the joint surface. The split shield protects it to prevent the connection between the external thread connector 12 and the hose 9 from being subjected to external force.

[0039] A circular groove 16 is provided on the back of the clamping jaw 2, and the inner wall of the circular groove 16 is in the shape of an internal thread. A temperature sensor 15 is connected to the inner thread of the circular groove 16. The cooling water channel 4 is externally connected with a regulating valve (which is a prior art and not shown in the figure). The temperature sensor 15 detects the temperature inside the clamping jaw 2. When the temperature rises, the regulating valve opening becomes larger to ensure the cooling effect.

[0040] The working principle of the present invention is:

[0041] After the cooling water in the cooling water channel 4 enters the two water cooling channels 7 of the clamping jaw 2, it flows in the reverse direction in the two water cooling channels 7 and then flows back to the return water channel 5, thereby realizing two-way cooling of the clamping jaw 2, making the cooling effect better and more uniform. No high water pressure is required, high-pressure water leakage is prevented, and hazards such as fuse of fixing bolts and pitting of joint surfaces are avoided.

[0042] After the cooling water in the cooling water channel 4 enters the two cavities 6 of the holder 3, it enters at a low level and exits at a high level, and the cooling water flows in the reverse direction and then flows back to the return water channel 5, thereby achieving two-way cooling of the holder 3, making the cooling effect better and more uniform. No high water pressure is required.

[0043] The cooling water channel 4 is externally connected with a regulating valve (which is prior art and not shown in the figure), and the temperature sensor 15 detects the temperature inside the clamping jaws 2. When the temperature rises, the opening of the regulating valve becomes larger to ensure the cooling effect.

[0044] The clamping jaw 2 is located at the working end and clamps the electrode with the clamp 3. Once the external thread connector 12 and the hose 9 on the clamping jaw 2 leak under the action of external force, the water will flow to the joint surface of the clamping jaw 2 and the cross arm body 1, causing pitting damage on the joint surface. The split shield protects it to prevent the connection between the external thread connector 12 and the hose 9 from being subjected to external force.

[0045] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention should all fall within the scope of protection of the present invention.

[0046] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. An electrode conductive cross arm of a LF ladle refining furnace, comprising a cross arm body, a clamping jaw and a clamp are installed on the cross arm body, and a cooling water channel and a return water channel are arranged in the cross arm body, characterized in that: Two cavities are provided in the clamp, and two water cooling channels are provided in the clamping jaws. The water inlet ends and water outlet ends of the two cavities and the two water cooling channels are connected to the cooling water channel and the return water channel respectively through pipes and hoses. The water flow directions in the two cavities are opposite, and the water flow directions in the two water cooling channels are opposite.

2. The electrode conductive cross arm of the LF ladle refining furnace according to claim 1, characterized in that: The cooling water channel and the return water channel are both connected with three external threaded tubes, one end of the external threaded tube passes through the cross arm body, one end of the external threaded tube passing through the cross arm body is in the shape of an external threaded thread, and the external threaded tubes are all connected with soft tubes.

3. The electrode conductive cross arm of the LF ladle refining furnace according to claim 2, characterized in that: The interior of the clamp is hollow, and the interior of the clamp is divided into two cavities by a partition inside the clamp. The water inlet end and the water outlet end of the cavity are respectively located on both sides of the clamp, the water inlet end of the cavity is located at the lower position of the clamp, and the water outlet end of the cavity is located at the upper position of the clamp. The water inlet ends of the two cavities are relatively distributed on both sides of the clamp, and the water outlet ends of the two cavities are relatively distributed on both sides of the clamp.

4. The electrode conductive cross arm of the LF ladle refining furnace according to claim 3, characterized in that: The water inlet ends of the two cavities are connected in parallel through pipes and then connected to any one of the three outer wire pipes on the cooling water channel through a hose, and the water outlet ends of the two cavities are connected in parallel through pipes and then connected to any one of the three outer wire pipes on the return water channel through a hose.

5. The electrode conductive cross arm of the LF ladle refining furnace according to claim 4, characterized in that: The two water-cooling channels in the clamp mouth are distributed in parallel, and the two water-cooling channels are curved. The water inlet and outlet of the water-cooling channels are connected to the outside from the top of the clamp mouth. The water inlet and outlet of the water-cooling channels are both internally threaded, and the water inlet and outlet of the water-cooling channels are threaded with external thread connectors. The water inlet ends of the two water-cooling channels are connected to the other two of the three external thread tubes on the cooling water channel through external thread connectors and hoses, and the water outlet ends of the two water-cooling channels are connected to the other two of the three external thread tubes on the return water channel through external thread connectors and hoses.

6. The electrode conductive cross arm of the LF ladle refining furnace according to claim 5, characterized in that: A split protective cover is welded on the clamping openings of the water inlet end and the water outlet end of the water cooling channel, and the split protective cover is sleeved on the outer side of the external thread joint and the hose.

7. The electrode conductive cross arm of the LF ladle refining furnace according to claim 6, characterized in that: The split shield comprises an outer shield and an inner shield. Both the outer shield and the inner shield are in the shape of round tubes. The outer wall of the outer shield is in the shape of outer thread threads, while the inner wall of the inner shield is in the shape of inner thread threads. The inner shield is threadedly connected to the outer shield. The split shield is welded to the clamp mouth through the outer shield.

8. The electrode conductive cross arm of the LF ladle refining furnace according to claim 1, characterized in that: A flow sensor is installed on the cooling water channel.

9. The electrode conductive cross arm of the LF ladle refining furnace according to claim 1, characterized in that: A circular groove is arranged on the back of the clamping jaws, the inner wall of the circular groove is in the shape of an internal thread, and a temperature sensor is connected to the internal thread of the circular groove.

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