CN216938373U

CN216938373U - Liquid lifting pipe for low-pressure casting

Info

Publication number: CN216938373U
Application number: CN202220287467.9U
Authority: CN
Inventors: 余洪广; 邢槐影
Original assignee: Kunshan Kunguangtai Industrial Materials Electromechanical Co ltd
Current assignee: Kunshan Kunguangtai Industrial Materials Electromechanical Co ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-07-12
Anticipated expiration: 2032-02-14

Abstract

The utility model discloses a liquid lifting pipe for low-pressure casting, which belongs to the technical field of low-pressure casting and solves the problems that the existing liquid lifting pipe for low-pressure casting cannot filter metal liquid, has large backflow impact force and poor bearing capacity, and the technical key points are as follows: be provided with buffering filtering mechanism in the pipe shaft, buffering filtering mechanism includes buffering group and filtering group, the pipe shaft is provided with the junction of mould cavity and bears strengthening mechanism, bear strengthening mechanism and include ring flange and strengthening group, the first overflow hole of a plurality of has been seted up in the outside of attenuator, buffering group has improved the heat exchange capacity between the aluminium liquid and the mobile ability of aluminium liquid and has improved the life-span of stalk, filtering group is convenient for filter the metal liquid, strengthening group has guaranteed the enhancement of pipe shaft use bearing capacity, cause the impact bottom the crucible when the metal liquid backward flow has been avoided in first overflow hole, it can filter the metal liquid, the backward flow impact force is little and the strong advantage of bearing capacity.

Description

Liquid lifting pipe for low-pressure casting

Technical Field

The utility model relates to the field of low-pressure casting, in particular to a liquid lifting pipe for low-pressure casting.

Background

The lift tube is a component used for low pressure casting. The process flow of low-pressure casting is as follows: the casting mold is placed above a sealed crucible, and then compressed air is introduced into the crucible to cause a low pressure on the surface of the molten metal, so that the molten metal rises from the riser tube to fill the casting mold and to control solidification.

The lift tube of the prior art is a tubular part with gradually changed internal diameter, does not have a filtering effect on metal liquid, easily causes impurities in the metal liquid to enter a mold in a mold filling process, causes the surface of a casting to form holes, has small resistance to aluminum liquid backflow in a straight tube after the crystallization and pressure maintenance of the casting are finished, seriously erodes the bottom of a heat preservation furnace pot, easily stirs impurities at the bottom of the pot, easily introduces the impurities into the mold in the next casting process, reduces the quality of the casting, has poor bearing capacity of the connection between the existing lift tube and a mold cavity, easily causes the fracture of the connection, and cannot meet the requirement of practical use.

Therefore, the existing lift tube for low-pressure casting has the defects of incapability of filtering metal liquid, large reflux impact force and poor bearing capacity, and is difficult to popularize and apply.

Therefore, there is a need to provide a lift tube for low pressure casting that addresses the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

In view of the shortcomings of the prior art, it is an object of embodiments of the present invention to provide a lift tube for low pressure casting that solves the above-mentioned problems of the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a stalk for low pressure casting, includes the pipe shaft, the middle part of pipe shaft is provided with buffering filter mechanism, buffering filter mechanism is including buffering group and filter group, buffering group is including first bellows and second bellows, filter group is including first filter and second filter, first bellows, second bellows, first filter and second filter all set up on the pipe shaft, the pipe shaft is provided with the reinforcing mechanism that bears with the die cavity's junction, it includes the ring flange and strengthens the group to bear the reinforcing mechanism, the bottom of pipe shaft is connected with the attenuator, the first overflow hole of a plurality of has been seted up in the outside of attenuator.

As a further scheme of the present invention, the first filter plate and the second filter plate are both fixedly connected to the inside of the pipe body, the first bellows is disposed at a side close to the first filter plate, and the second bellows is disposed at a side close to the second filter plate.

As a further scheme of the present invention, the reinforcing set includes a first anti-slip protrusion, a second anti-slip protrusion and a metal valve tube, the number of the first anti-slip protrusion and the number of the second anti-slip protrusion are both a plurality of protrusions, the first anti-slip protrusion is respectively and fixedly connected to the outer side of the tube body, the second anti-slip protrusion is respectively and fixedly connected to the inner side of the metal valve tube, the tube body is provided with a second anti-slip groove for being in matching connection with the second anti-slip protrusion, and the metal valve tube is provided with a first anti-slip groove for being in matching connection with the first anti-slip protrusion.

As a further scheme of the utility model, the number of the metal valve pipes is a plurality, the metal valve pipes are fixedly connected to the outer side of the pipe body through vacuum brazing, the outer sides of the metal valve pipes are fixedly connected with a flange plate through vacuum brazing, and a plurality of first mounting holes connected with a mold cavity are formed in the flange plate.

As a further scheme of the utility model, the number of the first overflow holes is at least four, the pipe body is provided with second overflow holes correspondingly communicated with the first overflow holes, and the inner diameter of each second overflow hole is larger than that of each first overflow hole.

As a further scheme of the utility model, a plurality of second mounting holes are formed at the joint of the damper and the pipe body, locking bolts are correspondingly mounted in the second mounting holes, and the locking bolts are respectively in threaded connection with the pipe body.

As a further scheme of the utility model, an inverted cone-shaped drainage groove is formed in the joint of the interior of the tube body and the die cavity, the tube body is composed of a silicon carbide film, an aluminum titanate tube and a refractory cement tube, and the silicon carbide film, the aluminum titanate tube and the refractory cement tube are arranged from inside to outside.

In summary, compared with the prior art, the embodiment of the utility model has the following beneficial effects:

the utility model arranges a buffer filtering mechanism in the middle of the tube body, the buffer filtering mechanism comprises a buffer group and a filtering group, the buffer group comprises a first corrugated tube and a second corrugated tube, the filtering group comprises a first filter plate and a second filter plate, the first corrugated tube, the second corrugated tube, the first filter plate and the second filter plate are arranged on the tube body, the arranged first corrugated tube and the arranged second corrugated tube improve the heat exchange capacity between aluminum liquid and the flowing capacity of the aluminum liquid, avoid the occurrence of the phenomenon of liquid lifting tube freeze-death or the phenomenon of early solidification entering a cavity, simultaneously improve the backflow resistance of the aluminum liquid, avoid the occurrence of the phenomenon of flushing of a heat preservation furnace, simultaneously the first corrugated tube and the second corrugated tube can absorb the thermal deformation caused by the temperature change, further improve the service life of the liquid lifting tube, and the first filter plate and the second filter plate arranged on the inner side of the tube body are convenient for filtering the metal liquid, the quality reduction of the casting caused by the filter residue entering the cavity is avoided.

The pipe shaft is provided with the enhancement mechanism that bears with the junction of mould cavity, bears the enhancement mechanism and includes ring flange and reinforcement group, and the pipe shaft is connected with mould cavity through the ring flange, and the junction of ring flange and pipe shaft is provided with the reinforcement group and has guaranteed that the pipe shaft uses bearing capacity's enhancement, has guaranteed the intensity that the pipe shaft used.

The bottom of pipe shaft is connected with the attenuator, and the first overflow hole of a plurality of has been seted up in the outside of attenuator, and the first overflow hole of setting can the effectual velocity oscillation that restraines the pouring in-process, and the foundry goods solidifies the back, and the liquid metal that does not solidify in the stalk can follow the slow outflow of first overflow hole department, can not cause the impact to the metal liquid of crucible bottom, has prevented the production of foundry goods inclusion, possesses the advantage that can filter metal liquid, the backward flow impact force is little and bearing capacity is strong.

To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of an internal cross-sectional structure according to an embodiment of the present invention.

Fig. 3 is an enlarged schematic structural diagram of embodiment a of the present invention.

Fig. 4 is an enlarged schematic structural diagram of embodiment B of the present invention.

Fig. 5 is an enlarged schematic structural diagram of embodiment C of the present invention.

Reference numerals: 1. a tube body; 2. a first bellows; 3. a second bellows; 4. a first filter plate; 5. a second filter plate; 6. a silicon carbide film; 7. an aluminum titanate tube; 8. a refractory cement tube; 9. a first anti-drop projection; 10. a first anti-drop groove; 11. a second anti-drop groove; 12. a second anti-drop bulge; 13. an inverted cone-shaped drainage groove; 14. a metal flap tube; 15. a flange plate; 16. a first mounting hole; 17. a damper; 18. A first overflow aperture; 19. a second overflow aperture; 20. a second mounting hole; 21. and locking the bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Specific implementations of the present invention are described in detail below with reference to specific embodiments.

Example 1

Referring to fig. 1 to 4, the liquid lifting tube for low-pressure casting comprises a tube body 1, wherein an inverted cone-shaped drainage groove 13 is formed in the connection position of the inside of the tube body 1 and a mold cavity, the tube body 1 is composed of a silicon carbide film 6, an aluminum titanate tube 7 and a refractory cement tube 8, and the silicon carbide film 6, the aluminum titanate tube 7 and the refractory cement tube 8 are arranged from inside to outside.

Preferably, the pipe body 1 is composed of a silicon carbide film 6, an aluminum titanate pipe 7 and a refractory cement pipe 8, the aluminum titanate pipe 7 has thermal shock resistance and erosion resistance, stable and smooth rising of aluminum liquid can be guaranteed, meanwhile, the aluminum liquid does not contact with iron materials in the rising process, and iron increase of the aluminum liquid is prevented.

Preferably, the silicon carbide film 6 arranged on the inner side of the tube body 1 ensures that the interior of the tube body 1 does not react with high-temperature molten aluminum, thereby influencing the casting quality of the casting.

Preferably, the junction of the inside of pipe shaft 1 and mould die cavity has been seted up inverted cone type drainage groove 13 and has had the slope, has further improved the stability that liquid flows.

Example 2

Referring to fig. 1 and 2, a lift tube for low pressure casting includes a tube body 1, a buffer filtering mechanism is disposed in the middle of the tube body 1, the buffer filtering mechanism includes a buffer group and a filtering group, the buffer group includes a first corrugated tube 2 and a second corrugated tube 3, the filtering group includes a first filtering plate 4 and a second filtering plate 5, and the first corrugated tube 2, the second corrugated tube 3, the first filtering plate 4 and the second filtering plate 5 are disposed on the tube body 1.

Further, first filter 4 and the equal fixed connection of second filter 5 in the inside of pipe shaft 1, first bellows 2 sets up in the one side of being close to first filter 4, second bellows 3 sets up in the one side of being close to second filter 5.

Preferably, the first corrugated pipe 2 and the second corrugated pipe 3 improve the heat exchange capacity between the aluminum liquid and the flowing capacity of the aluminum liquid, avoid the phenomenon that a liquid lifting pipe is frozen or enters a cavity to be solidified in advance, improve the backflow resistance of the aluminum liquid, and avoid the occurrence of the phenomenon that the heat preservation furnace is washed.

Preferably, the first bellows 2 and the second bellows 3 can absorb thermal deformation due to temperature change, thereby further improving the life of the lift tube.

Preferably, the first filter 4 and the second filter 5 that the pipe shaft 1 inboard set up are convenient for filter the metal liquid, have avoided the filter residue to get into the die cavity and have caused the quality reduction of foundry goods.

Example 3

Referring to fig. 1 to 3, a lift tube for low pressure casting includes a tube body 1, and a bearing reinforcing mechanism is disposed at a connection position of the tube body 1 and a mold cavity, and includes a flange 15 and a reinforcing set.

Further, strengthen group including first anticreep arch 9, the protruding 12 of second anticreep and petal pipe 14, the protruding 9 of first anticreep and the protruding 12 quantity of second anticreep are a plurality of, first anticreep is protruding 9 fixed connection respectively in the outside of pipe shaft 1, the protruding 12 of second anticreep is fixed connection respectively in the inside of petal pipe 14, offer the second anticreep recess 11 that is used for the cooperation to connect the protruding 12 of second anticreep on the pipe shaft 1, offer the first anticreep recess 10 that is used for the cooperation to connect first anticreep arch 9 on the petal pipe 14.

Further, the number of the metal valve pipes 14 is a plurality, the metal valve pipes are fixedly connected to the outer side of the pipe body 1 through vacuum brazing, the outer side of each metal valve pipe 14 is fixedly connected with a flange plate 15 through vacuum brazing, and a plurality of first mounting holes 16 connected with a mold cavity are formed in the flange plate 15.

Preferably, shaft 1 is connected with the mould cavity through ring flange 15, and ring flange 15 is provided with a plurality of lamella pipe 14 with shaft 1's junction, lamella pipe 14 is spacing and the spacing reinforcement of the cooperation of first anticreep arch 9 and first anticreep recess 10 through the cooperation of second anticreep recess 11 and second anticreep arch 12, and all braze respectively with

shaft

1 and 15 fixed connection of ring flange through the vacuum, guaranteed that shaft 1 uses bearing capacity's enhancement, guaranteed the intensity that shaft 1 used.

Example 4

Referring to fig. 1, 2 and 5, a lift tube for low pressure casting includes a tube body 1, a damper 17 is connected to a bottom of the tube body 1, and a plurality of first overflow holes 18 are opened on an outer side of the damper 17.

Further, the number of the first overflow holes 18 is at least four, the pipe body 1 is provided with second overflow holes 19 correspondingly communicated with the first overflow holes 18, and the inner diameter of each second overflow hole 19 is larger than that of each first overflow hole 18.

Further, a plurality of second mounting holes 20 are formed in the joints of the dampers 17 and the pipe body 1, locking bolts 21 are correspondingly mounted in the second mounting holes 20, and the locking bolts 21 are respectively in threaded connection with the pipe body 1.

Preferably, a plurality of first overflow holes 18 are formed in the outer side of the damper 17, the first overflow holes 18 are communicated with second overflow holes 19 corresponding to the pipe body 1, and the butt joint of the first overflow holes 18 and the second overflow holes 19 can effectively restrain the speed oscillation in the pouring process.

Preferably, after the casting is solidified, the liquid metal which is not solidified in the liquid lifting pipe can slowly flow back from the second overflow hole 19 to the first overflow hole 18, so that the liquid metal at the bottom of the crucible cannot be impacted, and the generation of casting inclusions is prevented.

Preferably, a locking bolt 21 is provided to enable the damper 17 to be removable for ease of use.

The working principle of the utility model is as follows: the pipe body 1 is composed of a silicon carbide film 6, an aluminum titanate pipe 7 and a refractory cement pipe 8, the arranged aluminum titanate pipe 7 has thermal shock resistance and erosion resistance, stable and smooth rising of aluminum liquid can be guaranteed, meanwhile, the aluminum liquid does not contact with an iron material in the rising process, iron increment of the aluminum liquid is prevented, the silicon carbide film 6 arranged on the inner side of the pipe body 1 guarantees that the interior of the pipe body 1 does not have chemical reaction with high-temperature aluminum water, so that casting quality of a casting is affected, an inverted cone-shaped drainage groove 13 is formed in the connection position of the interior of the pipe body 1 and a mold cavity to have gradient, and the flowing stability of liquid is further improved; the first corrugated pipe 2 and the second corrugated pipe 3 are arranged to improve the heat exchange capacity between the aluminum liquid and the flowing capacity of the aluminum liquid, avoid the phenomenon that a liquid lifting pipe is frozen or enters a cavity to be solidified in advance, improve the backflow resistance of the aluminum liquid, avoid the phenomenon that a heat preservation furnace is washed away, absorb the thermal deformation caused by the temperature change by the first corrugated pipe 2 and the second corrugated pipe 3, further prolong the service life of the liquid lifting pipe, facilitate the filtration of the metal liquid by the first filter plate 4 and the second filter plate 5 arranged on the inner side of the pipe body 1, and avoid the quality reduction of a casting caused by the filter residue entering the cavity; the pipe body 1 is connected with a die cavity through a flange 15, a plurality of metal valve pipes 14 are arranged at the connecting part of the flange 15 and the pipe body 1, the metal valve pipes 14 are reinforced through the matching limit of a second anti-falling groove 11 and a second anti-falling bulge 12 and the matching limit of a first anti-falling bulge 9 and a first anti-falling groove 10, and are fixedly connected with the pipe body 1 and the flange 15 respectively through vacuum brazing, so that the use bearing capacity of the pipe body 1 is enhanced, and the use strength of the pipe body 1 is ensured; the first overflow hole 18 of a plurality of has been seted up in the outside of attenuator 17, and first overflow hole 18 corresponds the intercommunication on the pipe shaft 1 and has second overflow hole 19, the speed oscillation in the butt joint of first overflow hole 18 and second overflow hole 19 can effectual suppression pouring in-process, the foundry goods solidifies the back, the liquid metal that does not solidify in the stalk can follow second overflow hole 19 to the slow backward flow of first overflow hole 18 department, can not cause the impact to the metal liquid of crucible bottom, the production of foundry goods inclusion has been prevented, and be provided with the dismantlement that damper 17 was realized to locking bolt 21, and convenient to use.

It should be noted that all the components in the present application are common standard components or components known to those skilled in the art, which effectively solve the problems of the prior art that the lift tube for low pressure casting has no capability of filtering the metal liquid, large reflux impact force and poor bearing capacity.

The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the utility model, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims

1. A lift tube for low pressure casting, comprising a tube body (1), characterized in that, the middle part of the pipe body (1) is provided with a buffering and filtering mechanism which comprises a buffering group and a filtering group, the buffer group comprises a first corrugated pipe (2) and a second corrugated pipe (3), the filter group comprises a first filter plate (4) and a second filter plate (5), the first corrugated pipe (2), the second corrugated pipe (3), the first filter plate (4) and the second filter plate (5) are all arranged on the pipe body (1), a bearing reinforcing mechanism is arranged at the joint of the pipe body (1) and the die cavity, the bearing reinforcing mechanism comprises a flange plate (15) and a reinforcing group, the bottom of pipe shaft (1) is connected with attenuator (17), a plurality of first overflow hole (18) have been seted up in the outside of attenuator (17).

2. The lift tube for low pressure casting according to claim 1, wherein the first filter plate (4) and the second filter plate (5) are fixedly connected to the inside of the tube body (1), the first bellows (2) is disposed at a side adjacent to the first filter plate (4), and the second bellows (3) is disposed at a side adjacent to the second filter plate (5).

3. The lift tube for low-pressure casting according to claim 1, wherein the reinforcing assembly comprises a first anti-falling protrusion (9), a second anti-falling protrusion (12) and a metal petal tube (14), the first anti-falling protrusion (9) and the second anti-falling protrusion (12) are respectively provided in a plurality of numbers, the first anti-falling protrusion (9) is respectively and fixedly connected to the outer side of the tube body (1), the second anti-falling protrusion (12) is respectively and fixedly connected to the inner side of the metal petal tube (14), the tube body (1) is provided with a second anti-falling groove (11) for being matched and connected with the second anti-falling protrusion (12), and the metal petal tube (14) is provided with a first anti-falling groove (10) for being matched and connected with the first anti-falling protrusion (9).

4. The lift tube for low pressure casting according to claim 3, wherein the number of the metal segment tubes (14) is several, and the metal segment tubes are fixedly connected to the outer side of the tube body (1) through vacuum brazing, the outer side of the metal segment tubes (14) is fixedly connected with a flange plate (15) through vacuum brazing, and the flange plate (15) is provided with a plurality of first mounting holes (16) connected with the mold cavity.

5. The lift tube for low-pressure casting according to claim 1, wherein the number of the first overflow holes (18) is at least four, the tube body (1) is provided with second overflow holes (19) correspondingly communicated with the first overflow holes (18), and the inner diameter of the second overflow holes (19) is larger than that of the first overflow holes (18).

6. The lift tube for low-pressure casting according to claim 5, wherein a plurality of second mounting holes (20) are formed at the joint of the damper (17) and the tube body (1), locking bolts (21) are correspondingly mounted in the second mounting holes (20), and the locking bolts (21) are respectively screwed on the tube body (1).

7. The lift tube for low-pressure casting according to claim 1, wherein an inverted cone-shaped drainage groove (13) is formed in the connection position of the interior of the tube body (1) and a mold cavity, the tube body (1) is composed of a silicon carbide film (6), an aluminum titanate tube (7) and a refractory cement tube (8), and the silicon carbide film (6), the aluminum titanate tube (7) and the refractory cement tube (8) are arranged from inside to outside.