CN220206310U

CN220206310U - Reinforced bottom ring

Info

Publication number: CN220206310U
Application number: CN202321017919.2U
Authority: CN
Inventors: 吴捷; 沈大伟; 李立鸿; 陈名炯; 周兵其
Original assignee: Guangdong Huaxing Heat Exchange Equipment Co ltd; Raoping Yuexing Copper Processing Co ltd; Shantou Huaxing Raoping Copper Industry Co ltd; SHANTOU HUAXING METALLURGICAL EQUIPMENT CO Ltd
Current assignee: Guangdong Huaxing Heat Exchange Equipment Co ltd; Raoping Yuexing Copper Processing Co ltd; Shantou Huaxing Raoping Copper Industry Co ltd; SHANTOU HUAXING METALLURGICAL EQUIPMENT CO Ltd
Priority date: 2023-04-29
Filing date: 2023-04-29
Publication date: 2023-12-19
Anticipated expiration: 2033-04-29

Abstract

The utility model discloses a reinforced bottom ring, which comprises a bottom ring body, wherein a cooling channel is arranged in the bottom ring body, and the reinforced bottom ring is characterized in that: the cooling device further comprises a reinforcing structure, wherein the reinforcing structure is fixedly arranged on the cold face of the bottom ring body. According to the utility model, the reinforcing structure is arranged on the cold surface of the bottom ring body, so that the mechanical strength and rigidity of the bottom ring can be improved, a certain protection effect is realized on the cold surface of the bottom ring body, the deformation caused by thermal stress generated by the temperature difference between the cold surface and the hot surface of the bottom ring can be reduced in the long-term high-temperature working condition use process, and the bottom ring is convenient to detach during overhauling or replacement.

Description

Reinforced bottom ring

Technical Field

The utility model relates to the technical field of metallurgical electric furnace equipment, in particular to a reinforced bottom ring.

Background

The submerged arc furnace is also called an electric arc furnace, and is mainly used for producing iron alloy, industrial silicon, calcium carbide, yellow phosphorus and other products, and is also called an electric furnace in the industry. The primary function of the electrode holder is to maintain the effective length of the working end of the electrode by holding the electrode, transmitting current to the electrode through the conductive tube, contact elements (e.g., copper tiles and pressure rings), and periodically depressing the electrode to replenish the consumed portion of the working end of the electrode. The electrode holder mainly comprises a bottom ring, a protective screen, a conductive pipe, a contact element and the like, wherein the protective screen, the conductive pipe, the contact element and the like are arranged above the bottom ring. Most of electrode holders are positioned in the submerged arc furnace and are directly contacted with high-temperature flue gas in the furnace, so that the working environment is bad.

The bottom ring is one of the key parts of the electrode holder and is used for protecting other parts of the electrode holder, so that the bottoms of the protection screen and the contact element are not damaged by high-temperature smoke, and the high-temperature smoke is isolated from entering the inside of the electrode holder, and the damage to the parts such as a conductive tube, the contact element and the like in the electrode holder is avoided.

There are two kinds of existing submerged arc furnace bottom rings: one is casting a copper bottom ring; the other is a forged copper bottom ring.

The cast copper bottom ring is manufactured by adopting a direct casting molding process or an embedded copper pipe casting molding process. The cast copper bottom ring has material defects which cannot be eliminated completely in the casting process, such as loose casting structures, air holes, slag inclusion, cracks and the like in the copper bottom ring. The cast copper bottom ring body has poor mechanical properties and poor thermal conductivity. The bottom ring cast and molded by the embedded copper pipe is easy to generate air gap thermal resistance with different degrees because the pure copper matrix and the embedded copper pipe are not completely fused, so that the heat conduction capacity of the whole assembly is reduced. Under the high-temperature working environment, the bottom ring is easy to deform under heating, and the casting defects are expanded along with the deformation, so that the use reliability of the bottom ring is seriously affected.

The bottom ring of the forged copper is made of a forged copper plate, and a cooling water channel is formed on the forged copper plate through the procedures of deep hole drilling (drilling is generally carried out from a cold face), plug welding, cover plate welding and the like, or through the procedures of milling a groove on a forged plate blank and cover plate welding to form the cooling channel.

The two processes adopt copper as a main material to realize the cooling function of the bottom ring, and the mechanical strength of the forged copper bottom ring is higher than that of the cast copper bottom ring, but the thermal stress generated by the temperature difference of the cold surface and the hot surface of the bottom ring in the process of long-term high-temperature working condition cannot be avoided, so that deformation is generated. When the micro deformation is generated, the use of the bottom ring is not influenced, but the difficulty of the micro deformation generated bottom ring is increased during overhauling or replacement and disassembly, and if larger accumulated thermal deformation is generated and external load is applied, creep deformation can be generated, and the product is damaged.

Disclosure of Invention

The problem to be solved by the present utility model is to provide a reinforced bottom ring which is capable of improving mechanical strength and reducing deformation due to long-term thermal stress.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a strenghthened type bottom ring, includes the bottom ring body, and the inside cooling channel that is equipped with of bottom ring body, its characterized in that: the cooling device further comprises a reinforcing structure, wherein the reinforcing structure is fixedly arranged on the cold face of the bottom ring body.

Typically, the side of the bottom ring body facing the furnace chamber of the submerged arc furnace is the hot side (downward) and the side facing away from the furnace chamber of the submerged arc furnace is the cold side (upward).

The reinforcing structure is arranged on the cold surface of the bottom ring body, so that the mechanical strength and rigidity of the bottom ring can be improved, a certain protection effect is achieved on the cold surface of the bottom ring body, the deformation caused by the thermal stress generated by the temperature difference between the cold surface and the hot surface of the bottom ring can be reduced in the long-term high-temperature working condition use process, and the bottom ring is convenient to detach during overhauling or replacement.

The bottom ring body may be a complete annular bottom ring, or may be a plurality of arc-shaped bottom ring units connected together by a connection structure to form an annular bottom ring. Typically, one or more cooling channels may be provided on one arcuate bottom ring unit. When a plurality of cooling channels are provided on the arcuate bottom ring unit, each cooling channel may be connected in series, in parallel, or in a combination of both.

In one preferred embodiment, the reinforcing structure is a reinforcing plate.

More preferably, the reinforcing plate has a shape and size matching those of the cold face of the bottom ring body. The stiffener can be equal to or slightly smaller than the bottom ring body cold face.

More preferably, the bottom ring body comprises at least two arcuate bottom ring units, each arcuate bottom ring unit being connected together by a coupling structure to form an annular bottom ring; the edge of the reinforcing plate is bent to form a reinforcing side plate, the reinforcing plate is arranged on the cold face of the arc-shaped bottom ring unit, the reinforcing side plate is arranged on the inner arc-shaped side face of the arc-shaped bottom ring unit, and the lower end face of the reinforcing side plate is higher than the hot face of the arc-shaped bottom ring unit. The reinforced side plates extend to form the reinforced side plates by bending the edges of the reinforced plates, so that the reinforced side plates cover the inner arc-shaped side surfaces of the arc-shaped bottom ring units, and the strength of the bottom rings is further improved; but the lower end surface of the reinforcing side plate cannot extend to be flush with the hot surface of the arc-shaped bottom ring unit so as to avoid overhigh temperature of the reinforcing side plate and the reinforcing plate in the use process.

More preferably, the bottom ring body is made of pure copper or copper alloy, and the reinforcing plate is made of copper alloy or steel. Adopt the reinforcing plate that is higher than the material mechanical strength of bottom ring body to connect, can improve the intensity and the rigidity of bottom ring. The copper alloy used for manufacturing the bottom ring body can be copper-chromium alloy, copper-zirconium alloy, copper-silver alloy, brass, aluminum bronze or chromium-zirconium-copper alloy; the copper alloy used for manufacturing the reinforcing plate can be brass, aluminum bronze, chromium-zirconium-copper alloy, copper-chromium alloy, copper-zirconium alloy or copper-silver alloy; the steel used to make the reinforcing plate may be carbon steel or stainless steel.

In a first specific scheme, the bottom ring body is made of pure copper, and the reinforcing plate is made of copper alloy.

In a second specific scheme, the bottom ring body is made of copper alloy, and the reinforcing plate is made of steel.

In a third specific scheme, the bottom ring body is made of copper alloy, and the reinforcing plate is made of copper alloy with higher mechanical strength.

In a more preferable scheme, a water inlet hole and a water outlet hole are formed in the cold surface of the bottom ring body, and the water inlet hole and the water outlet hole are communicated with the cooling channel; the reinforcing plate is provided with a first through hole and a second through hole, the first through hole corresponds to the water inlet hole, the second through hole corresponds to the water outlet hole, the cold face of the bottom ring body is welded with a water inlet pipe and a water outlet pipe, a bottom interface of the water inlet pipe penetrates through the first through hole and is communicated with the water inlet hole, and a bottom interface of the water outlet pipe penetrates through the second through hole and is communicated with the water outlet hole. Generally, the water inlet pipe and the water outlet pipe are made of stainless steel.

In another preferred embodiment, the reinforcing structure is a reinforcing frame formed by connecting a plurality of reinforcing frame bars. The reinforcing frame formed by connecting the reinforcing frame strips has higher structural strength, and can improve the strength and rigidity of the bottom ring.

More preferably, the cross section of the reinforcing frame strip is triangular, quadrilateral, I-shaped, U-shaped or T-shaped.

More preferably, the bottom ring body is made of pure copper or copper alloy, and the reinforcing frame strip is made of copper, copper alloy or steel.

In a preferred embodiment, the edges of the reinforcing structure are joined to the cold face of the bottom ring body by means of a weld. The welding is generally arc welding, laser welding, electron beam welding, diffusion welding or friction stir welding.

In another preferred scheme, a screw hole is formed in the cold face of the bottom ring body, a locking bolt is installed in the screw hole, a third through hole corresponding to the screw hole is formed in the reinforcing structure, the rod portion of the locking bolt penetrates through the third through hole, and the head portion of the locking bolt and the cold face of the bottom ring body clamp the reinforcing plate together. The reinforcing structure is locked on the cold face of the bottom ring body through locking bolts.

The reinforcing plate and the cold surface of the bottom ring body can be connected by combining two connecting modes of welding and locking by locking bolts.

The bottom ring body may be a wrought copper bottom ring body or a cast copper bottom ring body.

The processing process flow of the forged copper bottom ring body is as follows: casting (semi-continuous casting or continuous casting) or forging (or calendaring) the bottom ring; then a cooling channel is processed in the inner part of the bottom ring ((1) a water channel hole is drilled by adopting a milling groove or a drilling mode and adopting special drilling equipment, (2) a diversion device is additionally arranged after a cavity is milled); then welding an external plug (plug or cover plate); and finally, fixedly mounting the reinforcing structure on the cold face of the bottom ring to obtain the forged copper bottom ring body.

The processing process flow of the cast copper bottom ring body is as follows: firstly, manufacturing a bottom ring by adopting a direct casting molding or embedded copper pipe casting molding process; then welding an external plug (plug or cover plate); and finally, fixedly mounting the reinforcing structure on the cold face of the bottom ring to obtain the cast copper bottom ring body.

The cooling channel can adopt a mode of reducing the cross section of a special-shaped water channel (relative to a round hole and a square hole), increasing the flow speed by reducing the cross section of a through flow and increasing a spoiler in the area close to the bottom ring hot surface, so that the cooling strength of the cooling channel close to the hot surface is improved.

In the preferred scheme, be equipped with the lug on the additional strengthening, the top of lug is equipped with the hanging hole. The bottom of lug accessible welding is connected with additional strengthening, also can be connected with additional strengthening is integrative. The lifting lugs are arranged on the cold surface of the bottom ring body, and the bottom ring body can be conveniently lifted up through the lifting holes.

In a further preferred embodiment, the lifting lug is made of steel (such as carbon steel or stainless steel).

Compared with the prior art, the utility model has the following advantages:

according to the utility model, the reinforcing structure is arranged on the cold surface of the bottom ring body, so that the mechanical strength and rigidity of the bottom ring can be improved, a certain protection effect is realized on the cold surface of the bottom ring body, the deformation caused by thermal stress generated by the temperature difference between the cold surface and the hot surface of the bottom ring can be reduced in the long-term high-temperature working condition use process, and the bottom ring is convenient to detach during overhauling or replacement.

Drawings

FIG. 1 is a schematic view of the structure of an embodiment 1 of the present utility model;

FIG. 2 is a schematic illustration of the construction of a single arcuate bottom ring unit of FIG. 1;

FIG. 3 is a schematic view showing a structure in which the edge of the reinforcing plate is bent into a reinforcing side plate according to embodiment 1 of the present utility model;

FIG. 4 is a schematic structural view of embodiment 2 of the present utility model;

FIG. 5 is a schematic view showing the structure of embodiment 3 of the present utility model;

fig. 6 is a schematic structural view of embodiment 4 of the present utility model.

Detailed Description

The utility model is described in detail below with reference to the drawings and the specific embodiments.

Example 1

As shown in fig. 1-3, the reinforced bottom ring in this embodiment comprises a bottom ring body 1 and a reinforcing structure 2, wherein a cooling channel 11 is arranged in the bottom ring body 1, and the reinforcing structure 2 is fixedly mounted on a cold surface 12 of the bottom ring body 1.

Typically, the side of the bottom ring body 1 facing the furnace chamber of the submerged arc furnace is the hot side 13 (facing downwards) and the side facing away from the furnace chamber of the submerged arc furnace is the cold side 12 (facing upwards).

The reinforcing structure 2 is arranged on the cold face 12 of the bottom ring body 1, so that the mechanical strength and rigidity of the bottom ring can be improved, the cold face 12 of the bottom ring body 1 is protected to a certain extent, deformation caused by thermal stress generated by temperature difference between the cold face 12 and the hot face 13 of the bottom ring can be reduced in the long-term high-temperature working condition use process, and the bottom ring is convenient to detach during overhauling or replacement.

The reinforcing structure 2 is a reinforcing plate 21. The shape and size of the reinforcing plate 21 are matched with those of the cold face 12 of the bottom ring body 1. The reinforcement plate 21 may be of a size equal to or slightly smaller than the cold face 12 of the bottom ring body 1.

The bottom ring body 1 comprises at least two arc-shaped bottom ring units 14, and each arc-shaped bottom ring unit 14 is connected together through a connecting structure to form an annular bottom ring; the edges of the reinforcing plates 21 are bent to form reinforcing side plates 22, the reinforcing plates 21 are mounted on the cold surfaces 12 of the arc-shaped bottom ring units 14, the reinforcing side plates 22 are mounted on the inner arc-shaped side surfaces 15 of the arc-shaped bottom ring units 14, and the lower end surfaces of the reinforcing side plates 22 are higher than the hot surfaces 13 of the arc-shaped bottom ring units 14. The reinforcing side plate 22 is an extension of the reinforcing plate 21, the edge of the reinforcing plate 21 is bent to form the reinforcing side plate 22, so that the reinforcing side plate 22 covers the inner arc side surface 15 of the arc-shaped bottom ring unit 14, and the strength of the bottom ring is further improved; but the lower end surface of the reinforcing side plate 22 cannot extend to be flush with the hot face 13 of the arcuate bottom ring unit 14 to avoid excessive temperature of the reinforcing side plate 22 and reinforcing plate 21 during use. Typically, one or more cooling channels 11 may be provided on one arcuate bottom ring unit 14. When a plurality of cooling channels 11 are provided on the arcuate bottom ring unit 14, each cooling channel 11 may be connected in series, in parallel, or in a combination of both.

The bottom ring body 1 is made of pure copper, and the reinforcing plate 21 is made of copper alloy. The strength and rigidity of the bottom ring can be improved by connecting the reinforcing plates 21 having a higher mechanical strength than the material of the bottom ring body 1.

The cold surface 12 of the bottom ring body 1 is provided with a water inlet hole 16 and a water outlet hole 17, and the water inlet hole 16 and the water outlet hole 17 are communicated with the cooling channel 11; the reinforcing plate 21 is provided with a first through hole 211 and a second through hole 212, the first through hole 211 corresponds to the water inlet hole 16, the second through hole 212 corresponds to the water outlet hole 17, the cold face 12 of the bottom ring body 1 is welded with the water inlet pipe 3 and the water outlet pipe 4, a bottom interface of the water inlet pipe 3 passes through the first through hole 211 and is communicated with the water inlet hole 16, and a bottom interface of the water outlet pipe 4 passes through the second through hole 212 and is communicated with the water outlet hole 17. In general, the material of the water inlet pipe 3 and the water outlet pipe 4 is stainless steel.

The edges of the reinforcing structure 2 are connected to the cold face 12 of the bottom ring body 1 by welds 5. The welding is generally arc welding, laser welding, electron beam welding, diffusion welding or friction stir welding.

The reinforced structure 2 is provided with a lifting lug 6, and the top of the lifting lug 6 is provided with a hanging hole. The lifting lug 6 is made of carbon steel. The bottom of the lifting lug 6 can be connected with the reinforcing structure 2 through welding, and can also be integrally connected with the reinforcing structure 2. The lifting lugs 6 are arranged on the cold face 12 of the bottom ring body 1, and the bottom ring body 1 can be conveniently lifted up through the lifting holes.

Example 2

As shown in fig. 4, the reinforced bottom ring in this embodiment is different from embodiment 1 in that:

the reinforcing structure 2 is a reinforcing frame 23 formed by connecting a plurality of reinforcing frame bars 231. The reinforcing frame 23 formed by connecting the reinforcing frame bars 231 has high structural strength, and can improve the strength and rigidity of the bottom ring.

The cross-sectional shape of the reinforcing frame strip 231 is quadrangular.

The bottom ring body 1 is made of copper alloy, and the reinforcing frame bar 231 is made of steel.

Example 3

As shown in fig. 5, the reinforced bottom ring in this embodiment is different from embodiment 1 in that:

the cold face 12 of the bottom ring body 1 is provided with a screw hole 121, a locking bolt 122 is installed in the screw hole 121, the reinforcing structure 2 is provided with a third through hole 24 corresponding to the screw hole 121, the rod part of the locking bolt 122 penetrates through the third through hole 24, and the head part of the locking bolt 122 and the cold face 12 of the bottom ring body 1 jointly clamp the reinforcing plate 21. The reinforcing structure 2 is locked to the cold face 12 of the bottom ring body 1 by means of locking bolts 122.

Example 4

As shown in fig. 6, the reinforced bottom ring in this embodiment is different from embodiment 1 in that:

the reinforcing plate 21 and the cold surface 12 of the bottom ring body 1 may be connected by a combination of welding and locking by the locking bolts 122.

Example 5

The reinforced bottom ring in this embodiment differs from embodiment 1 in that:

the bottom ring body 1 is made of copper alloy, and the reinforcing plate 21 is made of steel.

Example 6

the bottom ring body 1 is made of copper alloy, and the reinforcing plate 21 is made of copper alloy with higher mechanical strength.

In addition, it should be noted that, in the specific embodiments described in the present specification, names of various parts and the like may be different, and all equivalent or simple changes of the structures, features and principles described in the conception of the present utility model are included in the protection scope of the present utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a strenghthened type bottom ring, includes the bottom ring body, and the inside cooling channel that is equipped with of bottom ring body, its characterized in that: the bottom ring body is fixedly arranged on the cold face of the bottom ring body; the reinforcing structure is a reinforcing plate or a reinforcing frame formed by connecting a plurality of reinforcing frame strips.

2. The reinforced bottom ring of claim 1, wherein: the shape and size of the reinforcing plate are matched with those of the cold face of the bottom ring body.

3. The reinforced bottom ring of claim 1, wherein: the bottom ring body comprises at least two arc-shaped bottom ring units, and the arc-shaped bottom ring units are connected together through a connecting structure to form an annular bottom ring; the edge of the reinforcing plate is bent to form a reinforcing side plate, the reinforcing plate is arranged on the cold face of the arc-shaped bottom ring unit, the reinforcing side plate is arranged on the inner arc-shaped side face of the arc-shaped bottom ring unit, and the lower end face of the reinforcing side plate is higher than the hot face of the arc-shaped bottom ring unit.

4. A reinforced bottom ring according to any one of claims 1-3, wherein: the bottom ring body is made of pure copper or copper alloy, and the reinforcing plate is made of copper alloy or steel.

5. A reinforced bottom ring according to any one of claims 1-3, wherein: a water inlet hole and a water outlet hole are formed in the cold surface of the bottom ring body, and the water inlet hole and the water outlet hole are communicated with the cooling channel; the reinforcing plate is provided with a first through hole and a second through hole, the first through hole corresponds to the water inlet hole, the second through hole corresponds to the water outlet hole, the cold face of the bottom ring body is welded with a water inlet pipe and a water outlet pipe, a bottom interface of the water inlet pipe penetrates through the first through hole and is communicated with the water inlet hole, and a bottom interface of the water outlet pipe penetrates through the second through hole and is communicated with the water outlet hole.

6. The reinforced bottom ring of claim 1, wherein: the cross section of the reinforcing frame strip is triangular, quadrilateral, I-shaped, U-shaped or T-shaped.

7. The reinforced bottom ring of claim 1 or 6, wherein: the bottom ring body is made of pure copper or copper alloy, and the reinforcing frame strip is made of copper, copper alloy or steel.

8. The reinforced bottom ring of claim 1, wherein:

the edge of the reinforcing structure is connected with the cold face of the bottom ring body through a welding line;

and/or the cold surface of the bottom ring body is provided with a screw hole, a locking bolt is arranged in the screw hole, the reinforcing structure is provided with a third through hole corresponding to the screw hole, the rod part of the locking bolt penetrates through the third through hole, and the head part of the locking bolt and the cold surface of the bottom ring body clamp the reinforcing plate together.

9. The reinforced bottom ring of claim 1, wherein: the reinforced structure is provided with a lifting lug, and the top of the lifting lug is provided with a hanging hole.

10. The reinforced bottom ring of claim 9, wherein: the lifting lug is made of steel.