CN114799130A - Composite liquid lifting pipe - Google Patents
Composite liquid lifting pipe Download PDFInfo
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- CN114799130A CN114799130A CN202210367376.0A CN202210367376A CN114799130A CN 114799130 A CN114799130 A CN 114799130A CN 202210367376 A CN202210367376 A CN 202210367376A CN 114799130 A CN114799130 A CN 114799130A
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- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 title abstract description 25
- 239000000919 ceramic Substances 0.000 claims description 54
- 238000007789 sealing Methods 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 9
- 238000007493 shaping process Methods 0.000 claims description 6
- 238000005524 ceramic coating Methods 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000002791 soaking Methods 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 16
- 239000002184 metal Substances 0.000 description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 239000000047 product Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000010439 graphite Substances 0.000 description 7
- 229910002804 graphite Inorganic materials 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D35/00—Equipment for conveying molten metal into beds or moulds
- B22D35/04—Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a composite liquid lifting pipe which comprises an inner pipe and an outer pipe, wherein the inner pipe is inserted and sleeved in the outer pipe, and an annular air guide space is formed between the inner pipe and the outer pipe. It sets up annular wind-guiding space between inner tube and outer tube to make can not get into the inner tube along with annular wind-guiding space discharge after soaking gas in the outer tube, thoroughly stop gaseous entering inner tube in, guarantee that there is not the gas pocket production in the inside of cast product, guarantee the quality of casting effect and cast product.
Description
The technical field is as follows:
the invention relates to the technical field of casting equipment, in particular to a composite lift tube.
Background art:
when the liquid lifting pipe is used in low-pressure casting, the upper end of the liquid lifting pipe is connected with a die cover plate through a connecting part, a die is fixed on the die cover plate, the upper end of the liquid lifting pipe is communicated with a liquid inlet of the die, the lower end of the liquid lifting pipe is about 50cm and is immersed in a crucible of a heat preservation furnace, the temperature of solution reaches about 700 ℃, when the liquid lifting pipe is used, gas is introduced into the heat preservation furnace, aluminum liquid or other metal liquid at the bottom of the heat preservation furnace enters the liquid lifting pipe, and the liquid lifting pipe enters the die from the liquid lifting pipe, so that casting is realized.
The following lift tubes are commonly used at present: one is an iron structure, and the liquid lifting pipe can generate iron corrosion after being soaked in the aluminum liquid for a long time, so that the iron content of the aluminum liquid is increased, the product quality is seriously influenced, and the iron corrosion can cause the damage of the liquid lifting pipe; the other is a graphite structure, but the graphite structure is easy to wear and break due to poor bearing capacity and wear resistance, and a ceramic structure is adopted, so that cracks are easily generated during use, pressure gas introduced into a crucible is easy to enter a liquid lifting pipe, and therefore gas is mixed into metal liquid lifted in the liquid lifting pipe, a large number of air holes are generated in a product cast in a mold, and the casting quality and the casting effect are influenced;
therefore, the lift tube for antigravity casting of high-temperature alloy in Chinese patent application No. 201711391173.0 consists of a high-temperature resistant metal tube with raised inner and outer walls, a metal disc, inner and outer ceramic linings, and inner and outer coatings, so that the lift tube has the advantages of high temperature resistance, no pollution to high-temperature alloy liquid, good thermal shock resistance and the like.
The invention content is as follows:
the invention aims to overcome the defects of the prior art and provide a composite liquid lifting pipe, which is characterized in that an annular air guide space is arranged between an inner pipe and an outer pipe, so that gas immersed in the outer pipe can be discharged along with the annular air guide space and cannot enter the inner pipe, the gas is completely prevented from entering the inner pipe, no air holes are generated in a cast product, and the casting effect and the quality of the cast product are ensured.
The scheme for solving the technical problems is as follows:
a composite liquid lifting pipe comprises an inner pipe and an outer pipe, wherein the inner pipe is inserted and sleeved in the outer pipe, and an annular air guide space is formed between the inner pipe and the outer pipe.
The bottom shaping of outer tube has the bottom annular limit of internal diameter radial extension, be equipped with bottom ceramic guide sleeve in the bottom of outer tube, bottom ceramic guide sleeve plug bush is in bottom annular limit, the bottom surface on bottom annular limit is stretched out to bottom ceramic guide sleeve's bottom, bottom ceramic guide sleeve's top stretches into in the outer tube, the shaping has radial extension on bottom ceramic guide sleeve's the top lateral wall, radial extension is directly over bottom annular limit, radial extension's bottom surface presses on the top surface on bottom annular limit, the bottom surface of inner tube presses on radial extension's top surface.
The outer pipe is characterized in that an outer reinforcing annular part extending outwards in the radial direction is formed on the outer side wall of the top of the outer pipe, a top annular groove is formed in the inner side wall of the top face of the outer reinforcing annular part, a top annular part extending in the radial direction is formed in the outer side wall of the top of the inner pipe, the top annular part is inserted in the top annular groove in a sleeved mode, a first annular groove is formed between the outer side wall of the top annular part and the inner side wall of the top annular groove, a circulation groove is formed between the bottom surface of the top annular part and the bottom surface of the top annular groove, the first annular groove is communicated with the circulation groove, and the circulation groove is communicated with the annular air guide space.
The top surface of the top annular part extends out of the top surface of the top annular groove, the top ceramic sleeve is placed on the top surface of the top annular part, and the top ceramic sleeve is communicated with the inner pipe.
The bottom surface of the top annular groove is provided with a plurality of protruding limiting parts, the bottom surface of the top annular part is pressed on the top surfaces of all the protruding limiting parts, and a circulation groove is formed between every two adjacent protruding limiting parts.
The top of the outer pipe is provided with a positioning connection ring sleeve and a connection ring sleeve, the connection ring sleeve is positioned right below the positioning connection ring sleeve, the connection ring sleeve is fixedly connected to the bottom surface of the positioning connection ring sleeve through a bolt, the top surface of the connection ring sleeve is pressed against the bottom surface of the positioning connection ring sleeve, a first installation ring groove is formed in the inner side wall of the top of the connection ring sleeve, the lower part of the outer reinforcement ring part is inserted in the first installation ring groove, and the outer pipe is inserted in the connection ring sleeve;
an upper annular groove is formed in the inner side wall of the top of the positioning connection ring sleeve, a lower annular groove is formed in the inner side wall of the bottom of the positioning connection ring sleeve, the inner side wall of the middle of the positioning connection ring sleeve and the inner side wall of the upper annular groove are both conical wall surfaces, and the upper insertion sleeve of the outer reinforcing annular part is arranged in the lower annular groove.
And a first high-temperature sealing layer is clamped between the outer reinforcing annular part and the inner side walls of the first installation annular groove and the lower annular groove.
The middle part of the positioning connection ring sleeve is inserted and sleeved with a main fixed sleeve body, the top part of the top annular part is inserted and sleeved at the middle part of the positioning connection ring sleeve, the bottom surface of the main fixed sleeve body is pressed on the top surface of the top annular part, the outer side wall of the main fixed sleeve body is close to or closely attached to the inner side wall of the middle part of the positioning connection ring sleeve, the outer side wall of the top part of the main fixed sleeve body is formed with a main annular connecting part extending in the radial direction, the main annular connecting part is inserted and sleeved in an upper annular groove, the bottom surface of the main annular connecting part is pressed against the bottom surface of the upper annular groove and is fixedly connected on the positioning connecting ring sleeve through a bolt, the top ceramic sleeve is inserted in the middle through hole of the main annular connecting part, the inside wall of the middle through hole of the main annular connecting part is a conical wall surface with a large upper end diameter and a small lower end diameter, and the outer side wall of the top ceramic sleeve is a conical wall surface which is matched with the inside wall of the middle through hole of the main annular connecting part.
An air guide annular groove is formed between the outer side wall of the top annular part and the inner side wall of the middle part of the positioning and connecting ring sleeve, the air guide annular groove is communicated with the first annular groove, a transversely arranged radial exhaust through hole is formed on the outer side wall of the positioning and connecting ring sleeve, and the inner end of the exhaust through hole extends out of the inner side wall of the middle part of the positioning and connecting ring sleeve and is communicated with the air guide annular groove.
The outer wall surface of the outer pipe and the bottom surface of the bottom annular edge are both coated with ceramic coatings, the outer pipe is a stainless steel pipe, and the inner pipe is a ceramic pipe.
The invention has the following outstanding effects:
1. it sets up annular wind-guiding space between inner tube and outer tube to make can not get into the inner tube along with annular wind-guiding space discharge after soaking gas in the outer tube, thoroughly stop gaseous entering inner tube, guarantee that there is not the gas pocket production in the inside of cast product, guarantee the quality of casting effect and cast product, improve the life of stalk.
2. The bottom ceramic guide sleeve is inserted in the bottom of the outer tube, the bottom end of the bottom ceramic guide sleeve extends out of the bottom surface of the outer tube, and the bottom surface of the inner tube is pressed on the top surface of the bottom ceramic guide sleeve, so that when molten metal enters the inner tube or flows back from the bottom end of the inner tube, the molten metal cannot impact the bottom surface of the outer tube, corrosion is prevented, the probability of damage to the bottom end of the outer tube is reduced, and the service life of the outer tube is prolonged.
3. A top ceramic sleeve is installed above an inner tube of the device, and a split structure is adopted between the top ceramic sleeve and the inner tube, so that the top ceramic sleeve can be replaced only when being used for a certain time, the whole inner tube does not need to be replaced, and the service life of the inner tube is ensured.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of the present invention;
FIG. 3 is an enlarged fragmentary view of another portion of the present invention;
figure 4 is a partial top view of the outer tube of the present invention.
The specific implementation mode is as follows:
in the embodiment, as shown in fig. 1 to 4, a composite lift tube comprises an inner tube 10 and an outer tube 20, wherein the inner tube 10 is inserted into the outer tube 20, and an annular air guiding space 1 is formed between the inner tube 10 and the outer tube 20.
Further, a bottom annular edge 21 extending radially inward is formed at the bottom end of the outer tube 20, a bottom ceramic guide sleeve 30 is arranged in the bottom of the outer tube 20, the bottom ceramic guide sleeve 30 is inserted and sleeved in the bottom annular edge 21, the bottom end of the bottom ceramic guide sleeve 30 extends out of the bottom surface of the bottom annular edge 21, the top of the bottom ceramic guide sleeve 30 extends into the outer tube 20, a radial extension portion 31 is formed on the outer side wall of the top of the bottom ceramic guide sleeve 30, the radial extension portion 31 is positioned right above the bottom annular edge 21, an annular groove 311 is formed at the bottom surface of the radial extension portion 31, an annular protrusion 211 is formed at the top surface of the bottom annular edge 21, the annular protrusion 211 is matched with the annular groove 311, the annular protrusion 211 is inserted and sleeved in the annular groove 311, and a first graphite sealing gasket 100 is clamped between the top surface of the bottom annular edge 21 and the bottom surface of the radial extension portion 31, the middle part of the first graphite sealing gasket 100 is clamped between the top surface of the annular protrusion 211 and the top surface of the annular groove 311, the sealing effect between the bottom ceramic guide sleeve 30 and the bottom annular edge 21 can be improved through the first graphite sealing gasket 100, the bottom surface of the inner tube 10 is pressed against the top surface of the radial extension part 31, a first annular protrusion 312 extending upwards is formed at the inner side of the top surface of the radial extension part 31, a first annular inner groove 101 is formed on the inner side wall of the bottom surface of the inner tube 10, the first annular protrusion 312 is inserted and sleeved in the first annular inner groove 101, a second graphite sealing gasket 200 is clamped between the top surface of the first annular protrusion 312 and the top surface of the first annular inner groove 101, the outer side wall of the first annular protrusion 312 is close to or tightly attached to the inner side wall of the first annular groove 101, and the concentricity of connection between the inner tube 10 and the bottom ceramic guide sleeve 30 is realized through the matching of the first annular protrusion 312 and the first annular groove 101, the second graphite sealing gasket 200 can improve the sealing effect between the first annular convex portion 312 and the first annular inner groove 101, preventing gas from entering, by improving the connection accuracy and the connection effect.
Further, an outer reinforcement ring part 22 extending radially outward is formed on the outer side wall of the top of the outer tube 20, a top ring groove 23 is formed on the inner side wall of the top surface of the outer reinforcement ring part 22, a top ring part 11 extending radially is formed on the outer side wall of the top of the inner tube 10, the top ring part 11 is inserted into the top ring groove 23, a first ring groove 2 is formed between the outer side wall of the top ring part 11 and the inner side wall of the top ring groove 23, a plurality of circulation grooves 3 are formed between the bottom surface of the top ring part 11 and the bottom surface of the top ring groove 23, the first ring groove 2 is communicated with all the circulation grooves 3, and all the circulation grooves 3 are communicated with the annular air guiding space 1.
Further, the top surface of the top annular portion 11 extends beyond the top surface of the top annular groove 23, the top ceramic sleeve 40 is placed on the top surface of the top annular portion 11, and the top ceramic sleeve 40 is communicated with the inner tube 10.
Further, a plurality of protruding limiting parts 231 are formed on the bottom surface of the top annular groove 23, the bottom surface of the top annular part 11 is pressed against the top surfaces of all the protruding limiting parts 231, and a circulation groove 3 is formed between every two adjacent protruding limiting parts 231.
Furthermore, a positioning connection ring sleeve 60 and a connection ring sleeve 50 are inserted and sleeved on the top of the outer pipe 20, the connection ring sleeve 50 is positioned right below the positioning connection ring sleeve 60, the connection ring sleeve 50 is fixedly connected to the bottom surface of the positioning connection ring sleeve 60 through a bolt, the top surface of the connection ring sleeve 50 is pressed against the bottom surface of the positioning connection ring sleeve 60, a first installation ring groove 51 is formed on the inner side wall of the top of the connection ring sleeve 50, the lower part of the outer reinforcement ring-shaped part 22 is inserted and sleeved in the first installation ring groove 51, and the outer pipe 20 is inserted and sleeved in the connection ring sleeve 50;
an upper annular groove 61 is formed in the inner side wall of the top of the positioning and connecting ring sleeve 60, a lower annular groove 62 is formed in the inner side wall of the bottom of the positioning and connecting ring sleeve 60, the inner side wall of the middle of the positioning and connecting ring sleeve 60 and the inner side wall of the upper annular groove 61 are both conical wall surfaces, the upper portion of the external reinforcing annular portion 22 is inserted and sleeved in the lower annular groove 62, and the lower annular groove 62 is vertically aligned with and communicated with the first installation annular groove 51.
Furthermore, a first high-temperature sealing layer 4 is clamped between the outer reinforcing annular part 22 and the inner side walls of the first mounting annular groove 51 and the lower annular groove 62, a first high-temperature sealing layer 4 is clamped between the bottom surface of the first mounting annular groove 51 and the bottom surface of the outer reinforcing annular part 22, a first high-temperature sealing layer 4 is also clamped between the upper part of the outer tube 20 and the inner side wall of the connecting annular sleeve 50, and all the first high-temperature sealing layers 4 can be made of asbestos sealing materials or graphite sealing materials;
an asbestos gasket or a graphite gasket is sandwiched between the top surface of the outer reinforcing annular portion 22 and the top surface of the lower annular groove 62.
Furthermore, a main fixed sleeve 70 is inserted into the middle of the positioning connection ring sleeve 60, the top of the top annular part 11 is inserted into the middle of the positioning connection ring sleeve 60, the bottom surface of the main fixed sleeve 70 is pressed against the top surface of the top annular part 11, the outer side wall of the main fixed sleeve 70 is close to or closely attached to the inner side wall of the middle of the positioning connection ring sleeve 60, a radially extending main annular connection part 71 is formed on the outer side wall of the top of the main fixed sleeve 70, the main annular connection part 71 is inserted into the upper annular groove 61, the bottom surface of the main annular connection part 71 is pressed against the bottom surface of the upper annular groove 61 and is fixedly connected to the positioning connection ring sleeve 60 through a bolt, the top ceramic sleeve 40 is inserted into the middle through hole of the main annular connection part 71, the inner side wall of the middle through hole of the main annular connection part 71 is a tapered wall with a large upper end diameter and a small end diameter, and the outer side wall of the top ceramic sleeve 40 is a tapered wall, the inner side wall of the middle through hole of the main annular connecting part 71 is tightly attached to realize matching;
the shaping of top surface middle part of top annular portion 11 has the upper ring shape positioning ring portion 12 that upwards extends, the shaping has lower annular positioning groove 41 on the bottom surface inside wall of top ceramic cover 40, the 12 plug bush of upper ring shape positioning ring portion is in annular positioning groove 41 down, the top surface of upper ring shape positioning ring portion 12 presses on the top surface of annular positioning groove 41 down, the lateral wall of upper ring shape positioning ring portion 12 is hugged closely or is close to the inside wall of lower annular positioning groove 41, realize the concentricity of being connected between top ceramic cover 40 and inner tube 10, improve connection accuracy and connection effect.
Further, an air guide annular groove 5 is formed between the outer side wall of the top annular portion 11 and the inner side wall of the middle of the positioning connection ring sleeve 60, the air guide annular groove 5 is communicated with the first annular groove 2, a transverse radial exhaust through hole 63 is formed on the outer side wall of the positioning connection ring sleeve 60, and the inner end of the exhaust through hole 63 extends out of the inner side wall of the middle of the positioning connection ring sleeve 60 and is communicated with the air guide annular groove 5.
Further, the outer wall surface of the outer tube 20 and the bottom surface of the bottom annular edge 21 are both coated with the ceramic coating 7, the outer tube 20 is a stainless steel tube, and the inner tube 10 is a ceramic tube.
In the drawings of the present embodiment, bolts are omitted from illustration in order to ensure the display of the main components.
In use, the top ceramic sleeve 40 is communicated with a liquid inlet of the mold, parts above the upper part of the outer tube 20 extend out of the crucible, the rest parts extend into the crucible, molten metal at the lower part of the crucible is contacted with the bottom of the outer tube 20, and when the top ceramic sleeve 40 is used, gas is introduced into the crucible, so that the molten metal at the bottom is extruded into the inner tube 10 of the riser tube and finally enters the top ceramic sleeve 40 from the top of the inner tube 10, and finally enters the mold from the top ceramic sleeve 40, so that casting is realized.
In this embodiment, the ceramic coating 7 can prevent the outer tube 20 from being corroded or corroded by the molten metal or gas, when the ceramic coating 7 fails, the molten metal or gas can damage the outer tube 20, when cracks are generated on both the outer tube 20 and the inner tube 10, the gas rushed into the crucible can enter the annular air guiding space 1 in the outer tube 20 from the cracks, and because the annular air guiding space 1 is communicated with the circulation groove 3, the first annular groove 2 is communicated with the circulation groove 3, the air guiding annular groove 5 is communicated with the first annular groove 2, the exhaust through hole 63 is communicated with the air guiding annular groove 5, so that the annular air guiding space 1, the circulation groove 3, the first annular groove 2 and the air guiding annular groove 5 have the same air pressure with the outside, at this time, the gas with pressure introduced into the crucible can go to a place with small pressure after entering the annular air guiding space 1, and can flow along the circulation groove 3, First ring channel 2, air guide ring channel 5 and exhaust through-hole 63 discharge, and can not get into inner tube 10 through the crack of inner tube 10 (there is the molten metal in inner tube 10 promoting, and the internal pressure of inner tube 10 is big this moment, and gas can not get into) to thoroughly stop during gas gets into inner tube 10, guarantee that the inside gas pocket that can not produce of cast product, guarantee the quality of casting effect and cast product.
And after the molten metal in the inner tube 10 reflows, the molten metal part can permeate into the gap of the inner tube 10, so that automatic repair is realized, the service life of the lift tube is greatly prolonged, the lift tube only needs to be replaced when the outer tube 20 generates large cracks or large-area damage and completely fails, and the service life of the lift tube is long.
Meanwhile, in the embodiment, the bottom ceramic guide sleeve 30 is inserted in the bottom of the outer tube 20, the bottom end of the bottom ceramic guide sleeve 30 extends out of the bottom surface of the outer tube 20, and the bottom surface of the inner tube 10 is pressed on the top surface of the bottom ceramic guide sleeve 30, so that when molten metal enters the inner tube 10 or flows back from the bottom end of the inner tube 10, the molten metal does not impact or wash against the bottom surface of the bottom annular edge 21 of the outer tube 20, corrosion is prevented, the probability of bottom end damage of the outer tube 20 is reduced, the service life of the outer tube is prolonged, the bottom ceramic guide sleeve 30 and the inner tube 10 are of a separate structure, when the bottom ceramic guide sleeve 30 is damaged, the bottom ceramic guide sleeve only needs to be replaced, the inner tube 10 does not need to be replaced, the service life of the inner tube 10 is ensured, and the effect is good.
And adopt split type structure between the top ceramic sheathing 40 of installation above the inner tube 10 and the inner tube 10, because top ceramic sheathing 40 is the vulnerable part, it often adheres a large amount of molten metal when casting for it splits easily damaged, only need to change it this moment can, need not to change whole inner tube 10, guarantees the life of inner tube 10, reduces replacement cost.
Finally, the above embodiments are only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (10)
1. A composite lift tube comprising an inner tube (10) and an outer tube (20), characterized in that: the inner pipe (10) is inserted in the outer pipe (20), and an annular air guide space (1) is formed between the inner pipe (10) and the outer pipe (20).
2. A composite lift tube according to claim 1, wherein: the bottom shaping of outer tube (20) has bottom annular edge (21) of inside radial extension, be equipped with bottom ceramic guide sleeve (30) in the bottom of outer tube (20), bottom ceramic guide sleeve (30) plug bush is in bottom annular edge (21), the bottom of bottom ceramic guide sleeve (30) stretches out the bottom surface of bottom annular edge (21), the top of bottom ceramic guide sleeve (30) stretches into in outer tube (20), shaping has radial extension (31) on the top lateral wall of bottom ceramic guide sleeve (30), radial extension (31) are in directly over bottom annular edge (21), the bottom surface of radial extension (31) presses on the top surface of bottom annular edge (21), the bottom surface of inner tube (10) presses on the top surface of radial extension (31).
3. A composite lift tube according to claim 1, wherein: the outer air duct is characterized in that an outer reinforcing annular part (22) extending outwards in the radial direction is formed on the outer side wall of the top of the outer tube (20), a top annular groove (23) is formed on the inner side wall of the top of the outer reinforcing annular part (22), a top annular part (11) extending in the radial direction is formed on the outer side wall of the top of the inner tube (10), the top annular part (11) is sleeved in the top annular groove (23) in an inserting mode, a first annular groove (2) is formed between the outer side wall of the top annular part (11) and the inner side wall of the top annular groove (23), a circulation groove (3) is formed between the bottom surface of the top annular part (11) and the bottom surface of the top annular groove (23), the first annular groove (2) is communicated with the circulation groove (3), and the circulation groove (3) is communicated with the annular air guide space (1).
4. A composite lift tube according to claim 3, wherein: the top surface of the top annular part (11) extends out of the top surface of the top annular groove (23), the top ceramic sleeve (40) is placed on the top surface of the top annular part (11), and the top ceramic sleeve (40) is communicated with the inner pipe (10).
5. A composite lift tube according to claim 3, wherein: a plurality of protruding limiting parts (231) are formed on the bottom surface of the top annular groove (23), the bottom surface of the top annular part (11) is pressed against the top surfaces of all the protruding limiting parts (231), and a circulation groove (3) is formed between every two adjacent protruding limiting parts (231).
6. A composite lift tube according to claim 3, wherein: the top of the outer pipe (20) is provided with a positioning connection ring sleeve (60) and a connection ring sleeve (50), the connection ring sleeve (50) is positioned under the positioning connection ring sleeve (60), the connection ring sleeve (50) is fixedly connected to the bottom surface of the positioning connection ring sleeve (60) through a bolt, the top surface of the connection ring sleeve (50) is pressed against the bottom surface of the positioning connection ring sleeve (60), a first installation ring groove (51) is formed in the inner side wall of the top of the connection ring sleeve (50), the lower part of the external reinforcement ring-shaped part (22) is inserted in the first installation ring groove (51), and the outer pipe (20) is inserted in the connection ring sleeve (50);
an upper annular groove (61) is formed in the inner side wall of the top of the positioning connection ring sleeve (60), a lower annular groove (62) is formed in the inner side wall of the bottom of the positioning connection ring sleeve (60), the inner side wall of the middle of the positioning connection ring sleeve (60) and the inner side wall of the upper annular groove (61) are both conical wall surfaces, and the upper portion of the outer reinforcing annular portion (22) is inserted and sleeved in the lower annular groove (62).
7. A composite lift tube according to claim 6, wherein: a first high-temperature sealing layer (4) is clamped between the outer reinforcing annular part (22) and the inner side walls of the first mounting annular groove (51) and the lower annular groove (62).
8. A composite lift tube according to claim 6, wherein: the middle part of the positioning connection ring sleeve (60) is inserted with a main fixed sleeve body (70), the top part of the top annular part (11) is inserted in the middle part of the positioning connection ring sleeve (60), the bottom surface of the main fixed sleeve body (70) is pressed on the top surface of the top annular part (11), the outer side wall of the main fixed sleeve body (70) is close to or closely attached to the inner side wall of the middle part of the positioning connection ring sleeve (60), the outer side wall of the top part of the main fixed sleeve body (70) is formed with a main annular connecting part (71) extending in the radial direction, the main annular connecting part (71) is inserted in the upper annular groove (61), the bottom surface of the main annular connecting part (71) is pressed on the bottom surface of the upper annular groove (61) and is fixedly connected on the positioning connection ring sleeve (60) through bolts, the top ceramic sleeve (40) is inserted in the middle through hole of the main annular connecting part (71), the inner side wall of the middle through hole of the main annular connecting part (71) is a conical wall with large upper end diameter and small lower end diameter, the outer side wall of the top ceramic sleeve (40) is a conical wall surface which is matched with the inner side wall of the middle through hole of the main annular connecting part (71).
9. A composite lift tube according to claim 8, wherein: an air guide annular groove (5) is formed between the outer side wall of the top annular part (11) and the inner side wall of the middle of the positioning connection ring sleeve (60), the air guide annular groove (5) is communicated with the first annular groove (2), a transverse radial exhaust through hole (63) is formed in the outer side wall of the positioning connection ring sleeve (60), and the inner end of the exhaust through hole (63) extends out of the inner side wall of the middle of the positioning connection ring sleeve (60) and is communicated with the air guide annular groove (5).
10. A composite lift tube according to claim 1, wherein: the outer wall surface of the outer pipe (20) and the bottom surface of the bottom annular edge are coated with ceramic coatings (7), the outer pipe (20) is a stainless steel pipe, and the inner pipe (10) is a ceramic pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210367376.0A CN114799130A (en) | 2022-04-08 | 2022-04-08 | Composite liquid lifting pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210367376.0A CN114799130A (en) | 2022-04-08 | 2022-04-08 | Composite liquid lifting pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114799130A true CN114799130A (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210367376.0A Pending CN114799130A (en) | 2022-04-08 | 2022-04-08 | Composite liquid lifting pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719612A (en) * | 2022-04-08 | 2022-07-08 | 浙江万丰精密制造有限公司 | Furnace cover plate mechanism provided with composite liquid lifting pipe |
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| CN207494535U (en) * | 2017-11-30 | 2018-06-15 | 江苏尧恒光电科技有限公司 | Magnesium alloy differential low voltage casting device |
| CN109940152A (en) * | 2017-12-21 | 2019-06-28 | 沈阳铸造研究所有限公司 | A kind of high temperature alloy antigravity casting stalk and its manufacturing method |
| CN212495326U (en) * | 2020-06-11 | 2021-02-09 | 保定立中东安轻合金部件制造有限公司 | Differential pressure one-mold multi-cavity lift tube |
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| GB1595732A (en) * | 1977-01-28 | 1981-08-19 | Buscher Kg | Pouring tubes for casting metals under gas pressure |
| US20100084439A1 (en) * | 2006-03-24 | 2010-04-08 | Toshiba Kikai Kabushiki Kaisha | Melt supply pipe for aluminum die casting |
| CN204892913U (en) * | 2015-04-27 | 2015-12-23 | 杭州新永丰钢业有限公司 | Take foundry furnace of vacuum stalk |
| CN207494535U (en) * | 2017-11-30 | 2018-06-15 | 江苏尧恒光电科技有限公司 | Magnesium alloy differential low voltage casting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719612A (en) * | 2022-04-08 | 2022-07-08 | 浙江万丰精密制造有限公司 | Furnace cover plate mechanism provided with composite liquid lifting pipe |
| CN114719612B (en) * | 2022-04-08 | 2023-02-03 | 浙江万丰精密制造有限公司 | Furnace cover plate mechanism provided with composite liquid lifting pipe |
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Application publication date: 20220729 |