CN218656712U

CN218656712U - Prevent psammitolite sintered core iron structure

Info

Publication number: CN218656712U
Application number: CN202223140466.0U
Authority: CN
Inventors: 庚剑峰; 汪云龙; 李春来; 姚远
Original assignee: Himile Mechanical Science and Technology Shandong Co Ltd
Current assignee: Himile Mechanical Science and Technology Shandong Co Ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-03-21
Anticipated expiration: 2032-11-25

Abstract

The utility model discloses a core iron structure for preventing sand core sintering, which relates to the technical field of cast steel and comprises a circular core iron body, wherein the core iron body comprises an upper ring pipe and a lower ring pipe, the upper ring pipe and the lower ring pipe are arranged at intervals from top to bottom, and a plurality of connecting ribs are fixed between the upper ring pipe and the lower ring pipe; the opposite sides of the upper ring pipe are respectively connected with a first air inlet pipe and a first air outlet pipe, the opposite sides of the lower ring pipe are respectively connected with a second air inlet pipe and a second air outlet pipe, and the first air inlet pipe and the first air outlet pipe are used for being connected with a cold air passage on the sand mold; the utility model discloses can effectively avoid causing the foundry goods to scrap because of the psammitolite sintering problem that high temperature produced, improve product yield and product quality because of the psammitolite sintering.

Description

Prevent psammitolite sintered core iron structure

Technical Field

The utility model relates to a cast steel technical field, specific theory relates to a prevent psammitolite sintered core iron structure.

Background

Aiming at the problem that the sand core at the position of the air passage of the cast steel product is sintered at overhigh temperature, so that the air passage of a casting is difficult to clean and even the casting is scrapped, the existing casting technology is mainly used for high-temperature resistant chromite sand or other raw sand in a treatment mode of the position of the air passage (the length of the air passage is 30 times larger than the thickness of the air passage), the casting product with the air passage is often a thick-wall casting, and the problem that the sand core is sintered or molten steel permeates into the sand core even if the high-temperature resistant raw sand is used can be caused, so that the casting cannot be cleaned and even scrapped.

In the prior art, a water-cooling core is used, water needs to be introduced into the water-cooling core for cooling during or after casting, the water-cooling core cooling has an obvious effect on an air passage sand core with a small aspect ratio (the ratio of the length of the sand core to the thickness of the sand core, wherein the length of the sand core is the circumference of an annular sand core), but has a poor effect on an air passage sand core with a large aspect ratio, for example, the aspect ratio is larger than 30, the effect is poor, the yield of castings is low, the quality of the castings is low, extra processing of sintering positions is needed, extra workload is generated, and the construction period is prolonged; in addition, if the sealing performance is poor in the water cooling process, the situation of spray explosion can be caused when molten steel contacts cooling water, and potential safety hazards can exist.

In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to the above, provides a prevent core iron structure of psammitolite sintering, can effectively avoid causing the foundry goods to scrap because of the psammitolite sintering problem that high temperature produced, improves product yield and product quality.

For solving the technical problem, the utility model discloses a following technical scheme: a core iron structure for preventing sand core sintering comprises a circular core iron body, wherein the core iron body comprises an upper ring pipe and a lower ring pipe, the upper ring pipe and the lower ring pipe are arranged at intervals up and down, and a plurality of connecting ribs are fixed between the upper ring pipe and the lower ring pipe;

and the opposite sides of the upper ring pipe are respectively connected with a first air inlet pipe and a first air outlet pipe, the opposite sides of the lower ring pipe are respectively connected with a second air inlet pipe and a second air outlet pipe, and the first air inlet pipe and the first air outlet pipe are used for being connected with a cold air passage on the sand mold.

Furthermore, the upper ring pipe and the lower ring pipe are both circular rings, and the diameters of the upper ring pipe and the lower ring pipe are the same;

the upper ring pipe and the lower ring pipe are both seamless round steel pipes, and the wall thickness of the upper ring pipe and the wall thickness of the lower ring pipe are more than or equal to 4mm.

Furthermore, a plurality of connecting ribs are sequentially arranged along the circumferential direction to form a zigzag structure.

Furthermore, two first reinforcing assemblies are fixed on the core iron body, one first reinforcing assembly is arranged between the first air inlet pipe and the second air inlet pipe, and the other first reinforcing assembly is arranged between the first air outlet pipe and the second air outlet pipe.

Furthermore, be fixed with two second on the core iron body and strengthen the subassembly, two second strengthen the subassembly and two first strengthen the subassembly and set up along core iron body circumference interval in turn, and two second strengthen the subassembly with the axis symmetry setting of core iron body.

Furthermore, the upper ring pipe is provided with a hanging nose corresponding to the first reinforcing component and the second reinforcing component.

Further, the first reinforcing assembly comprises two first reinforcing pipes which are arranged in parallel at intervals from top to bottom;

the second reinforcing assembly comprises two second reinforcing pipes, and the two second reinforcing pipes are arranged along the circumferential direction of the core iron body at intervals.

Furthermore, the upper ring pipe and the lower ring pipe are formed in a hot bending mode.

Further, first reinforced pipe and second reinforced pipe are square pipes, and first reinforced pipe and second reinforced pipe all extend along the radial outside of core iron body.

Furthermore, the first air inlet pipe and the first air outlet pipe are both L-shaped; the horizontal sections of the first air inlet pipe and the first air outlet pipe extend outwards along the radial direction of the upper ring pipe, and the vertical sections of the first air inlet pipe and the first air outlet pipe extend upwards from the horizontal sections of the first air inlet pipe and the first air outlet pipe;

the second air inlet pipe and the second air outlet pipe are both L-shaped; the horizontal sections of the second air inlet pipe and the second air outlet pipe extend outwards along the radial direction of the lower ring pipe, and the vertical sections of the second air inlet pipe and the second air outlet pipe extend upwards from the horizontal sections of the second air inlet pipe and the second air outlet pipe.

The utility model adopts the above technical scheme after, compare with prior art, have following advantage:

the utility model discloses can effectively avoid producing the problem of psammitolite sintering because of high temperature.

The utility model discloses can increase substantially the quality of foundry goods, avoid handling the sintering position, produce extra work load and time limit for a project.

The utility model provides the high foundry goods yield avoids scrapping because of the unable foundry goods of reprocessing of psammitolite sintering.

The utility model is made of seamless steel pipes, and can be recycled for multiple use;

the utility model discloses can promote to other similar foundry goods products and use, have the product of long through-hole structure like other types of thick wall positions.

The present invention will be described in detail with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a schematic view of the usage state of the present invention.

In the figure, the position of the upper end of the main shaft,

1-upper ring pipe, 2-lower ring pipe, 3-connecting rib, 4-first air inlet pipe, 5-first air outlet pipe, 6-second air inlet pipe, 7-second air outlet pipe, 8-first reinforcing pipe, 9-second reinforcing pipe, 10-hanging nose, 11-first cold air flue, 12-second cold air flue, 13-first air outlet channel, 14-second air outlet channel, 15-annular sand core, 16-sand core, 17-riser and 18-pouring system.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1, the utility model provides a prevent core iron structure of psammitolite sintering, including the annular core iron body of circle, the core iron body includes ring canal 1 and lower ring canal 2, the inner chamber of ring canal 1 and lower ring canal 2 forms air current channel and lower air current channel respectively.

The upper ring pipe 1 and the lower ring pipe 2 are arranged at an upper interval and a lower interval, and the upper ring pipe 1 and the lower ring pipe 2 are fixedly connected through a plurality of connecting ribs 3.

The upper ring pipe 1 and the lower ring pipe 2 are both circular rings, and the inner circle diameter and the outer circle diameter of the upper ring pipe 1 are the same as those of the lower ring pipe 2.

The upper ring pipe 1 and the lower ring pipe 2 are both seamless circular steel pipes, and the wall thickness of the upper ring pipe 1 and the wall thickness of the lower ring pipe 2 are more than or equal to 4mm.

The upper ring pipe 1 and the lower ring pipe 2 are formed in a hot bending mode.

The connecting ribs 3 are round steel, and the plurality of connecting ribs 3 are sequentially arranged along the circumferential direction to form a zigzag structure, so that the strength of the core iron can be ensured. The tooth form of the sawtooth structure is an isosceles triangle.

A first air inlet pipe 4 and a first air outlet pipe 5 are respectively arranged on the opposite sides of the upper ring pipe 1, and the first air inlet pipe 4 and the first air outlet pipe 5 are both communicated with the upper air flow channel; the first air inlet pipe 4 and the first air outlet pipe 5 are both L-shaped; the horizontal sections of the first air inlet pipe 4 and the first air outlet pipe 5 extend outwards along the radial direction of the upper ring pipe 1, and the vertical sections of the first air inlet pipe 4 and the first air outlet pipe 5 extend upwards from the horizontal sections.

A second air inlet pipe 6 and a second air outlet pipe 7 are respectively arranged on the opposite sides of the lower ring pipe 2, and the second air inlet pipe 6 and the second air outlet pipe 7 are L-shaped; the second air inlet pipe 6 and the second air outlet pipe 7 are communicated with the lower air flow channel; the horizontal sections of the second air inlet pipe 6 and the second air outlet pipe 7 extend outwards along the radial direction of the lower ring pipe 2, and the vertical sections of the second air inlet pipe 6 and the second air outlet pipe 7 extend upwards from the horizontal sections of the second air inlet pipe 6 and the second air outlet pipe 7.

First intake pipe 4 sets up in second intake pipe 6 top, and first intake pipe 4 is parallel and level mutually with the exit end terminal surface of second intake pipe 6.

The first air outlet pipe 5 is arranged above the second air outlet pipe 7, and the end face of the outlet end of the first air outlet pipe 5 is flush with the end face of the outlet end of the second air outlet pipe 7.

Be fixed with first reinforcement subassembly and second on the core iron body and strengthen the subassembly, first reinforcement subassembly and second are strengthened the subassembly and generally select to set up at core head hookup location in actual production, can increase core head hookup location intensity, avoid the too big hookup location fracture that leads to of psammitolite buoyancy.

The first reinforcing assemblies are arranged in two, one first reinforcing assembly is arranged between the first air inlet pipe 4 and the second air inlet pipe 6, and the other first reinforcing assembly is arranged between the first air outlet pipe 5 and the second air outlet pipe 7.

The first reinforcing component comprises two first reinforcing pipes 8, and the two first reinforcing pipes 8 are arranged at intervals in an up-and-down parallel mode.

The second strengthens the subassembly and is equipped with two, and two second strengthen the subassembly and two first strengthen the subassembly and set up along circumference interval in turn, and two second strengthen the subassembly with core iron body axis symmetry setting.

The second reinforcing component comprises two second reinforcing pipes 9, and the two second reinforcing pipes 9 are arranged along the circumferential direction of the core iron body at intervals.

First reinforced pipe 8 and second reinforced pipe 9 are square pipes, and first reinforced pipe 8 and second reinforced pipe 9 all extend along the radial outside of core iron body.

The upper ring pipe 1 is provided with a hanging nose 10 corresponding to the first reinforcing component and the second reinforcing component.

As shown in fig. 2, the core iron structure is arranged in an annular sand core 15, and the air inlet ends of the first air inlet pipe 4 and the second air inlet 6 are respectively communicated with a first cold air flue 11 and a second cold air flue 12 on a sand mold; and the air outlet ends of the first air outlet pipe 5 and the second air outlet pipe 7 are respectively communicated with a first air outlet channel 13 and a second air outlet channel 14 on the sand mould.

The first cold air passage 11, the second cold air passage 12, the first air outlet passage 13 and the second air outlet passage 14 are formed by embedding seamless steel pipes in a sand mold in advance. The first cold air channel 11, the second cold air channel 12, the first air outlet channel 13 and the second air outlet channel 14 extend out of the sand box, and the first cold air channel 11 and the second cold air channel 12 are connected with a cooling compressed air system.

A sand core 16 is arranged in the annular sand core 15, the sand core 16, the annular sand core 15 and the sand mold form a cavity together, a riser 17 is connected above the cavity, and the cavity is communicated with a pouring system 18.

The utility model discloses a use:

when the sand mold is manufactured, a core iron structure is placed in an annular sand core, a first air outlet pipe and a second air outlet pipe of the core iron structure are respectively communicated with a first air outlet channel and a second air outlet channel, a first air inlet pipe and a second air inlet pipe are respectively communicated with a first cold air channel and a second cold air channel, after the mold closing is completed, the first air inlet pipe and the second air inlet pipe are connected to a cooling compressed air system, and the positions of outlets of the first air outlet channel and the second air outlet channel are detected to detect whether air outlet is smooth or not; opening a cooling compressed air system 5-10min before casting to enable the cooling compressed air system to pass through an air flow channel in the core body so as to flow through the sand core; then, pouring is started; measuring the temperature of the casting near the sand core at regular time, and closing a cooling compressed air system according to the process requirement when the temperature is reduced to a certain temperature; the rest operations are carried out according to a normal flow.

The foregoing is illustrative of the best mode of the invention, and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.

Claims

1. The utility model provides a prevent sintered core iron structure of psammitolite, includes the annular core iron body of circle, its characterized in that: the core iron body comprises an upper ring pipe (1) and a lower ring pipe (2), the upper ring pipe (1) and the lower ring pipe (2) are arranged at intervals up and down, and a plurality of connecting ribs (3) are fixed between the upper ring pipe (1) and the lower ring pipe (2);

the sand mold cooling device is characterized in that the opposite sides of the upper ring pipe (1) are respectively connected with a first air inlet pipe (4) and a first air outlet pipe (5), the opposite sides of the lower ring pipe (2) are respectively connected with a second air inlet pipe (6) and a second air outlet pipe (7), and the first air inlet pipe (4) and the first air outlet pipe (5) are used for being connected with a cold air passage on a sand mold.

2. The core iron structure for preventing the sand core from sintering of claim 1, wherein: the upper ring pipe (1) and the lower ring pipe (2) are both circular rings, and the diameters of the upper ring pipe (1) and the lower ring pipe (2) are the same;

the upper ring pipe (1) and the lower ring pipe (2) are both seamless round steel pipes, and the wall thickness of the upper ring pipe (1) and the wall thickness of the lower ring pipe (2) are more than or equal to 4mm.

3. The core iron structure for preventing the sand core from sintering of claim 1, wherein: the connecting ribs (3) are sequentially arranged along the circumferential direction to form a zigzag structure.

4. The core iron structure for preventing the sand core from sintering of claim 1, wherein: two first reinforcing assemblies are fixed on the core iron body, one first reinforcing assembly is arranged between the first air inlet pipe (4) and the second air inlet pipe (6), and the other first reinforcing assembly is arranged between the first air outlet pipe (5) and the second air outlet pipe (7).

5. A core iron structure for preventing the sintering of a sand core as claimed in claim 4, wherein: the core iron body is fixed with two second reinforcing assemblies, the two second reinforcing assemblies and the two first reinforcing assemblies are alternately arranged at intervals along the circumferential direction of the core iron body, and the two second reinforcing assemblies are symmetrically arranged along the central axis of the core iron body.

6. The core iron structure for preventing the sand core from sintering of claim 5, wherein: the upper ring pipe (1) is provided with a hanging nose (10) corresponding to the first reinforcing component and the second reinforcing component.

7. The core iron structure for preventing the sand core from sintering of claim 5, wherein: the first reinforcing component comprises two first reinforcing pipes (8), and the two first reinforcing pipes (8) are arranged in parallel at intervals up and down;

the second reinforcing component comprises two second reinforcing pipes (9), and the two second reinforcing pipes (9) are arranged along the circumferential direction of the core iron body at intervals.

8. The core iron structure for preventing the sand core from sintering of claim 7, wherein: first reinforced pipe (8) and second reinforced pipe (9) are square pipes, and first reinforced pipe (8) and second reinforced pipe (9) all extend along the radial outside of core iron body.

9. The core iron structure for preventing the sand core from sintering of claim 1, wherein: the first air inlet pipe (4) and the first air outlet pipe (5) are both L-shaped; the horizontal sections of the first air inlet pipe (4) and the first air outlet pipe (5) extend outwards along the radial direction of the upper ring pipe (1), and the vertical sections of the first air inlet pipe (4) and the first air outlet pipe (5) extend upwards from the horizontal sections of the first air inlet pipe and the first air outlet pipe;

the second air inlet pipe (6) and the second air outlet pipe (7) are both L-shaped; the horizontal sections of the second air inlet pipe (6) and the second air outlet pipe (7) extend outwards along the radial direction of the lower ring pipe (2), and the vertical sections of the second air inlet pipe (6) and the second air outlet pipe (7) extend upwards from the horizontal sections of the second air inlet pipe and the second air outlet pipe.