CN218611600U

CN218611600U - Cover plate for heat preservation of chute

Info

Publication number: CN218611600U
Application number: CN202222626842.0U
Authority: CN
Inventors: 朱金钢; 杨嘉俊; 彭臣; 覃远刚; 余志辉; 李洪伟
Original assignee: Ruyuan Yao Autonomous County Dongguang High Purity New Materials Co ltd; Shaoguan East Sunshine Technology R&D Co Ltd
Current assignee: Ruyuan Yao Autonomous County Dongguang High Purity New Materials Co ltd; Shaoguan East Sunshine Technology R&D Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-03-14
Anticipated expiration: 2032-09-30

Abstract

The utility model discloses an apron is used in chute heat preservation, the apron passes through flip structure and is connected with the chute, and the lid closes the top at the chute, the inside of apron is equipped with heating member. The utility model discloses integrated ordinary heat preservation apron's advantage, the lid that can overturn closes, and apron itself has the auxiliary heating function, and it is good to have heat preservation heating performance, and convenient to use's advantage can effectively reduce the defective rate of ingot casting production.

Description

Cover plate for heat preservation of chute

Technical Field

The utility model relates to an aluminium melt production technical field especially relates to a chute is apron for heat preservation.

Background

In the aluminum melt production industry, the chute is essential basic equipment for production, is used for connecting a smelting furnace, a holding furnace, degassing and filtering equipment and a casting machine, and is essential equipment for molten aluminum transfer casting. The mobility of aluminium liquid is guaranteed in order to reduce the temperature drop of aluminium liquid, avoids aluminium liquid to solidify in the chute simultaneously and leads to supplying to flow smoothly and cause the casting failure, and the heat preservation effect of chute is closely relevant with quality problems such as appearance quality, bubble, crackle of ingot casting, consequently if the heat preservation effect is not good, will uprise through the produced ingot casting defective rate of chute to influence the production progress. Therefore, the chute must be continuously insulated to reduce the reject ratio of production, so there is a need to design an insulation structure capable of improving the chute.

SUMMERY OF THE UTILITY MODEL

The utility model provides a chute keeps warm and uses apron has integrated ordinary heat preservation apron's advantage, and the lid that can overturn closes, and apron itself has the auxiliary heating function, and it is good to have heat preservation heating performance, and convenient to use's advantage can effectively reduce the defective rate of ingot casting production.

The technical scheme of the utility model as follows:

the utility model provides a apron is used in chute heat preservation, the apron passes through flip structure and is connected with the chute, and the lid closes the top at the chute, the inside of apron is equipped with the heating member.

During the casting, the chute need heat the heat preservation, earlier close in order to carry out the flip lid with the relative chute of apron through flip structure, because the apron lid closes behind the chute, can tentatively realize certain heat preservation effect to the chute, still be equipped with the heating-element in the apron simultaneously and heat, can make the apron further play for the heat retaining purpose of chute heating, the temperature drop of aluminium liquid flow through the chute when reduction casting that can furthest makes the apron have heat preservation heating performance good, convenient to use's advantage, can effectively reduce the defective rate of ingot casting production.

Further, the apron is cuboid cavity structure, the heating member is followed the length direction setting of apron is violently established in the cavity structure, and both ends are fixed respectively on the inside wall of apron both sides.

The cover plate is in a cuboid cavity structure, and the cavity structure corresponds to the groove surface of the chute when the cover plate is covered, so that the whole chute is tightly covered; meanwhile, a heating element is fixed at the center of the cavity of the cover plate for heating, so that the purpose of heating the chute is achieved, and the temperature drop of the molten aluminum flowing through the chute during casting can be reduced to the maximum extent. Meanwhile, two different powers can be designed for the heating element, and a heat preservation gear and a heating gear are respectively adopted in the waiting time of the casting interval and 30 minutes before casting, so that the power consumption is reduced, and the energy is saved and the efficiency is high.

Further, the heating element is a silicon carbide rod.

The silicon carbide rod is embedded in the cover plate to serve as a heating element, the heating power of different working states can be designed according to actual conditions, the heat preservation effect of the chute can be guaranteed, and the temperature drop of discharged molten aluminum flowing through the chute is smaller than 3 ℃/m. The silicon carbide rod is a rod-shaped or tubular non-metal high-temperature electric heating element which is prepared by processing high-purity green hexagonal silicon carbide serving as a main raw material according to a certain material ratio to prepare a blank, and carrying out high-temperature silicification at 2200 ℃ and recrystallization sintering. The normal use temperature in oxidizing atmosphere can reach 1450 deg.C, and the continuous use time can reach 2000 hr. The silicon carbide rod has the characteristics of high service temperature, high temperature resistance, oxidation resistance, corrosion resistance, quick temperature rise, long service life, small high-temperature deformation, convenience in installation and maintenance and the like, and has good chemical stability. With automatic electronic control system is supporting, can obtain accurate invariable temperature, can adjust the temperature according to the curve automatically according to the needs of production technology again, so the utility model discloses use the heating of elema not only convenient, but also safe and reliable.

Furthermore, the periphery of the bottom of the cover plate is provided with a contact frame, and the bottom of the cover plate is in contact with the groove edge of the chute through the contact frame, so that the cover plate covers the chute.

The contact frame can guarantee that the cover plate is in sealing contact with the chute surface, the sealing performance is enhanced, and the heat preservation effect is improved.

Furthermore, the contact frame adopts a ceramic fiber packing with the thickness of 20-30 mm.

The lower edge of the cover plate is tightly tied with a ceramic fiber packing with the thickness of 20-30mm as a contact frame at the periphery of the contact chute, so that the cover plate is in soft contact and sealing with the chute surface, and the heat loss of the cover plate when a silicon carbide rod is arranged in the cover plate and heated is further reduced.

Further, the cover plate comprises a steel shell, wherein an aluminum silicate ceramic fiberboard layer with the thickness of 10-15mm is arranged in the steel shell, and the aluminum silicate ceramic fiberboard layer is arranged along the surface of the inner wall of the steel shell to realize full coverage on the surface of the inner wall of the steel shell.

Further, an aluminum silicate needle punched fiber blanket layer with the thickness of 10-20mm is filled between the aluminum silicate ceramic fiber plate layer and the steel shell.

Except that the lower surface of the cover plate is covered above the chute and is not sealed by a steel structure, the shell structures of the other five surfaces are welded by stainless steel plates with the thickness of 1-2mm to form a steel shell, and the size of the steel shell can be designed according to the size of the chute; and an aluminum silicate ceramic fiber board layer with the thickness of 10-15mm is adopted in the cover plate to be fixed along the stainless steel structure, and 1 aluminum silicate needled fiber blanket layer with the thickness of 10-20mm is filled between the stainless steel plate and the aluminum silicate ceramic fiber board layer and is compressed, so that the double-layer heat preservation design of the aluminum silicate ceramic fiber board and the aluminum silicate needled fiber blanket is added in the cover plate, the heat preservation performance of the cover plate is further improved, and the heat loss of the silicon carbon rod during heating is also reduced.

Further, flip structure includes mount, pivot, rotation connecting plate, two the mount is fixed on the lateral wall of chute, two the top of mount all is equipped with the bearing frame, the both ends of pivot are respectively through two the bearing frame is fixed, and two the one end of rotation connecting plate is fixed the cup joint respectively the both ends of pivot, two the other end of rotation connecting plate respectively with the top both sides fixed connection of apron.

The cover plate is fixed on the side surface of the chute through a turnover structure formed by a rotating connecting plate and a rotating shaft so as to ensure that the cover plate can be conveniently turned over and covered or opened relative to the chute. The cover plate can be easily turned up when the chute is cleaned and maintained, the cover plate is not required to be lifted away by a crown block, the operation is convenient, the working efficiency is improved, and the potential safety hazard is reduced.

Furthermore, the rotating connecting plates are L-shaped frames, connecting rings are respectively arranged on two sides of the top of the cover plate, through holes are formed in the ends, far away from the rotating shaft, of the two rotating connecting plates, and bolts penetrate through the through holes and the connecting rings and then are fixedly locked with nuts, so that the two rotating connecting plates are fixedly connected with the cover plate.

The connecting ring that rotates the connecting plate and pass through on through-hole and the apron utilizes the bolt to carry out can dismantle the connection, and the dismouting when the later stage is maintained the protection is conveniently carried out to improve the convenience.

Further, the chute comprises a chute channel steel shell, a chute heat-insulating layer and a chute body from outside to inside in sequence. In order to further reduce heat loss and ensure the heat preservation effect of the chute, a heat preservation layer is additionally arranged in the chute to enhance the heat preservation effect.

The utility model has the advantages as follows:

the utility model adopts the turnover structure to fix the cover plate on the side surface of the chute, so that the cover plate can be easily turned up through the turnover structure when the chute is cleaned or maintained after casting is finished, the cover plate is not required to be lifted away by a crown block, the efficiency is greatly improved, and the potential safety hazard is reduced; just the utility model discloses an apron lid closes tentatively to have the heat preservation effect behind the chute, still is equipped with heating member simultaneously in the apron and heats, can make the apron further play for the purpose of chute heating, and the aluminium liquid flows through the temperature drop of chute when reduction casting that can furthest makes the apron have heat preservation heating performance good, and convenient to use's advantage can effectively reduce the defective rate of ingot casting production.

Drawings

FIG. 1 is a schematic view of a deck panel connected to a chute by a flip-up mechanism;

FIG. 2 is another perspective view of the cover plate coupled to the flip structure;

fig. 3 is a sectional view of the cover plate.

In the figure: the device comprises a cover plate 1, a steel shell 101, an aluminum silicate needle punched fiber blanket layer 102, an aluminum silicate ceramic fiber plate layer 103, a contact frame 104, a chute 2, a chute steel shell 201, a chute insulating layer 202, a chute body 203, a heating element 3, a fixing frame 4, a rotating shaft 5, a rotating connecting plate 6 and a connecting ring 7.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting the present patent.

Example 1:

as shown in fig. 1-3, a cover plate for heat preservation of a chute, the cover plate 1 is connected with the chute 2 through a turnover structure and covers the chute 2, and a heating element 3 is arranged in the cover plate 1.

Wherein, apron 1 is cuboid cavity structure, heating member 3 is the elema, and the elema is followed the length direction of apron 1 sets up, violently establishes in the cavity structure, and both ends are fixed respectively on the inside wall of apron 1 both sides.

The cover plate 1 is in a cuboid cavity structure, and the cavity structure corresponds to the groove surface of the chute 2 when the cover plate 1 is covered so as to tightly cover the whole chute 2; meanwhile, a silicon carbide rod is fixed at the center of the cavity of the cover plate 1 for heating, so that the aim of heating the chute 2 is fulfilled, and the temperature drop of the molten aluminum flowing through the chute 2 during casting can be reduced to the maximum extent. Meanwhile, two different powers can be designed for the silicon carbide rod, and a heat preservation gear and a heating gear are respectively adopted in the waiting time of the casting interval and 30 minutes before casting, so that the power consumption is reduced, and the energy is saved and the efficiency is high.

In the embodiment, the silicon carbide rod is embedded in the cover plate 1 to serve as the heating element 3, the heating power in different working states can be designed according to actual conditions, the heat preservation effect of the chute 2 can be ensured, and the temperature drop of discharged molten aluminum flowing through the chute is less than 3 ℃/m.

The silicon carbide rod is a rod-shaped or tubular nonmetal high-temperature electric heating element which is prepared by processing high-purity green hexagonal silicon carbide serving as a main raw material according to a certain material ratio to prepare a blank, and carrying out high-temperature silicification, recrystallization and sintering at 2200 ℃ to prepare the rod-shaped or tubular nonmetal high-temperature electric heating element. The normal use temperature in oxidizing atmosphere can reach 1450 deg.C, and the continuous use time can reach 2000 hr. The silicon carbide rod has the characteristics of high service temperature, high temperature resistance, oxidation resistance, corrosion resistance, quick temperature rise, long service life, small high-temperature deformation, convenience in installation and maintenance and the like, and has good chemical stability. With automatic electronic system is supporting, can obtain accurate invariable temperature, can adjust the temperature according to the needs of production technology according to the curve is automatic again, so the utility model discloses use the heating of elema not only convenient, but also safe and reliable.

The most common control mode of the power supply process of the silicon carbide rods is to use silicon controlled rectifiers to control the transformer primary and the transformer secondary in an anti-parallel mode to be connected with a group of corresponding silicon carbide rods. The design of the transformer needs to leave certain allowance, the transformer is generally designed into single-phase 380V incoming line voltage, and the secondary voltage is matched with the resistance and the power of the connected silicon carbide rod. The silicon carbide rod is aged in the using process, the resistance is increased, and even the resistance is increased to 4 times of the initial resistance in the service life, so that the secondary of the transformer has to have several adjustable voltage gears, each gear is designed to be constant power, the lowest gear voltage is designed according to the initial resistance of the silicon carbide rod, the rest of the gears are designed after the resistance is aged, and the highest gear voltage is 2 times of the lowest gear. Therefore, the resistance of the silicon carbide rod is increased after a period of time, the power required by heating cannot be met, the voltage is increased by one level, the heating power can be met, and the like, so that the service life of the silicon carbide rod is ensured. The secondary voltage is usually designed to be 4 steps, 60V, 80V, 100V and 120V. It should be noted that the principle and process of conducting heating for the silicon carbide rod are well known to those skilled in the art, and will not be described in detail herein.

Referring to fig. 3, in the present embodiment, the cover plate 1 includes a steel shell 101, an aluminum silicate ceramic fiberboard layer 103 with a thickness of 10-15mm is disposed in the steel shell 101, the aluminum silicate ceramic fiberboard layer 103 is disposed along an inner wall surface of the steel shell 101, and fully covers the inner wall surface of the steel shell 101, and an aluminum silicate needle punched fiber blanket layer 102 with a thickness of 10-20mm is further filled between the aluminum silicate ceramic fiberboard layer 103 and the steel shell 101.

Because the cover plate 1 is in a cuboid cavity structure, except that the lower surface of the cover plate 1 is covered above the chute 2 and is not sealed by a steel structure, the shell structures of the other five surfaces are formed by welding stainless steel plates with the thickness of 1-2mm to form a steel shell 101, and the size of the steel shell 101 can be designed according to the size of the chute 2; and moreover, an aluminum silicate ceramic fiber board layer 103 with the thickness of 10-15mm is adopted in the cover plate 1 to be fixed along a stainless steel structure, and meanwhile, 1 aluminum silicate needle punched fiber blanket layer 102 with the thickness of 10-20mm is filled between the stainless steel plate and the aluminum silicate ceramic fiber board layer 103 and is compressed, so that the double-layer heat preservation design of the aluminum silicate ceramic fiber board and the aluminum silicate needle punched fiber blanket is added in the cover plate 1, the heat preservation performance of the cover plate 1 is further improved, and the heat loss during heating of a silicon carbon rod is also reduced.

In this embodiment, a handle may be provided at one side of the steel shell 101 at the outermost layer of the cover plate 1, so that the handle may be used for turning the cover plate 1 to close or open.

Referring to fig. 1 and 2, in this embodiment, the turnover structure includes a fixing frame 4, a rotating shaft 5, and a rotating connecting plate 6, two of the fixing frame 4 is fixed on the side wall of the chute 2, two of the top of the fixing frame 4 are both provided with bearing seats, two ends of the rotating shaft 5 are fixed through two of the bearing seats respectively, and two of one ends of the rotating connecting plate 6 are fixedly sleeved at two ends of the rotating shaft 5 respectively, and the other ends of the rotating connecting plate 6 are fixedly connected with two sides of the top of the cover plate 1 respectively.

The cover plate 1 is fixed on the side surface of the chute 2 through a turnover structure formed by a rotating connecting plate 6 and a rotating shaft 5 so as to ensure that the cover plate 1 can be conveniently turned over and covered or opened relative to the chute 2. Can easily jack up apron 1 when clearance chute 2 and maintain, do not need the overhead traveling crane to hang away apron 1, convenient operation has improved work efficiency, has reduced the potential safety hazard.

The fixing frame 4 is formed by welding steel plates and can be fixed on the side wall of the chute 2 by welding or bolt locking.

Referring to fig. 1, in the present embodiment, the chute 2 sequentially includes, from outside to inside, a chute channel casing 201, a chute insulating layer 202, and a chute body 203. In order to further reduce heat loss and ensure the heat preservation effect of the chute 2, a heat preservation layer is additionally arranged in the chute 2 to enhance the heat preservation effect.

The utility model adopts the turnover structure to fix the cover plate 1 on the side surface of the chute 2, so that the cover plate 1 can be easily turned up through the turnover structure when the chute 2 is cleaned or the chute 2 is maintained after casting is finished, the cover plate 1 is not required to be lifted away by a crane, the efficiency is greatly improved, and the potential safety hazard is reduced; just the utility model discloses a 1 lid of apron closes and tentatively has the heat preservation effect behind chute 2, still is equipped with heating member 3 in apron 1 simultaneously and heats, can make apron 1 further play the purpose for chute 2 heating, and aluminium liquid flows through the temperature drop of chute 2 when reduction casting that can furthest makes apron 1 have heat preservation heating performance good, and convenient to use's advantage can effectively reduce the defective rate of ingot casting production.

Example 2:

as shown in fig. 1 and fig. 2, this embodiment is similar to embodiment 1, except that in this embodiment, a contact frame 104 is disposed on a peripheral edge of a bottom of the cover plate 1, and the bottom of the cover plate 1 contacts with a groove edge of the chute 2 through the contact frame 104, so that the cover plate 1 covers the chute 2.

The contact frame 104 can ensure that the cover plate 1 is in sealing contact with the chute surface, the sealing performance is enhanced, and the heat preservation effect is improved.

Wherein, the contact frame 104 adopts a ceramic fiber packing with the thickness of 20-30 mm.

The part of the lower edge of the cover plate 1, which is in contact with the chute 2 at the periphery, is tightly tied by adopting a ceramic fiber packing with the thickness of 20-30mm as a contact frame 104, so that the soft contact and sealing between the cover plate 1 and the chute surface are ensured, and the heat loss of the cover plate 1 when a silicon carbide rod is arranged in the cover plate for heating is further reduced.

Example 3:

as shown in fig. 1 and fig. 3, this embodiment is similar to embodiment 1, except that in this embodiment, the rotating connecting plates 6 are L-shaped frames, two sides of the top of the cover plate 1 are respectively provided with a connecting ring 7, and one ends of the two rotating connecting plates 6, which are far away from the rotating shaft 5, are both provided with through holes, and are fixed and locked with nuts after passing through the through holes and the connecting rings 7 by bolts, so that the two rotating connecting plates 6 are fixedly connected with the cover plate 1.

The rotation connecting plate 6 utilizes the bolt to dismantle through-hole and go up go-between 7 on the apron 1 and is connected, and the dismouting when the protection is maintained in the later stage to the convenience improves.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The cover plate for the heat preservation of the chute is characterized in that the cover plate (1) is connected with the chute (2) through a turnover structure and covers the chute (2), and a heating element (3) is arranged in the cover plate (1); the cover plate (1) is of a cuboid cavity structure, the heating element (3) is arranged along the length direction of the cover plate (1) and transversely arranged in the cavity structure, and two ends of the heating element are respectively fixed on the inner side walls of two sides of the cover plate (1);

the edge is equipped with contact frame (104) around the bottom of apron (1), the bottom of apron (1) is passed through contact frame (104) with the groove of chute (2) is along the contact, so that apron (1) lid closes on chute (2).

2. The cover plate for the thermal insulation of a chute as claimed in claim 1, characterized in that said heating member (3) is a silicon carbide rod.

3. The deck plate for holding pans as in claim 1, wherein the contact frame (104) is formed from a 20-30mm thick ceramic fiber packing.

4. The cover plate for chute heat preservation according to claim 1, characterized in that the cover plate (1) comprises a steel shell (101), wherein a 10-15mm thick alumina silicate ceramic fiberboard layer (103) is arranged in the steel shell (101), and the alumina silicate ceramic fiberboard layer (103) is arranged along the inner wall surface of the steel shell (101) to realize full coverage on the inner wall surface of the steel shell (101).

5. The cover plate for the heat preservation of the chute as claimed in claim 4, characterized in that an aluminum silicate needle punched fiber blanket layer (102) with the thickness of 10-20mm is filled between the aluminum silicate ceramic fiber plate layer (103) and the steel shell (101).

6. The cover plate for heat preservation of the chute according to claim 1, wherein the turnover structure comprises two fixing frames (4), a rotating shaft (5) and two rotating connecting plates (6), the two fixing frames (4) are fixed on the side wall of the chute (2), bearing seats are arranged at the tops of the two fixing frames (4), two ends of the rotating shaft (5) are fixed through the two bearing seats respectively, one ends of the two rotating connecting plates (6) are fixedly sleeved at two ends of the rotating shaft (5) respectively, and the other ends of the two rotating connecting plates (6) are fixedly connected with two sides of the top of the cover plate (1) respectively.

7. The cover plate for chute heat preservation according to claim 6, characterized in that the rotating connecting plates (6) are L-shaped frames, two connecting rings (7) are respectively arranged on two sides of the top of the cover plate (1), through holes are arranged at one ends of the two rotating connecting plates (6) far away from the rotating shaft (5), and bolts are used for passing through the through holes and the connecting rings (7) and then are fixedly locked with nuts, so that the two rotating connecting plates (6) are fixedly connected with the cover plate (1).

8. The cover plate for chute heat preservation according to claim 1, characterized in that the structure of the chute (2) from outside to inside comprises a chute steel shell (201), a chute heat preservation layer (202) and a chute body (203) in sequence.