CN213856943U

CN213856943U - Large-scale annular casting gating system

Info

Publication number: CN213856943U
Application number: CN202022717432.8U
Authority: CN
Inventors: 杨秀峰; 陈炳贵
Original assignee: Sichuan Tianqi Yongda Machinery Manufacturing Co ltd
Current assignee: Sichuan Tianqi Yongda Machinery Manufacturing Co ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-08-03
Anticipated expiration: 2030-11-20

Abstract

The utility model discloses a large-scale annular foundry goods gating system, including setting up at the sprue in the pouring die cavity outside, setting up in the first cross gate of pouring die cavity bottom and setting up the psammitolite of watering at the pouring die cavity, it is provided with the entry of watering to lie in central point on the psammitolite of watering, is provided with a plurality of second cross gates along its radial direction on the psammitolite of watering, second cross gate one end is connected to the entry of watering respectively, and other end tip is provided with the filter, be provided with at least one pouring tube on the filter respectively, the pouring tube other end is connected to the pouring die cavity respectively. By arranging the pouring gate structure in the pouring system, the molten metal can uniformly and stably flow into the pouring cavity in the pouring process, the impact of the molten metal on the cavity and the sand core during pouring molding is reduced, and the molding quality of a casting is ensured; and the pouring gate structure of the whole pouring system is simpler, and the difficulty of the pouring molding process is reduced.

Description

Large-scale annular casting gating system

Technical Field

The utility model relates to a casting technical field, in particular to large-scale annular foundry goods gating system.

Background

The casting is a method of pouring molten metal into a casting cavity adapted to the shape of a part, and obtaining the part or a blank after the molten metal is cooled and solidified. Common defects in castings are slag holes, air holes, sand holes, cold shut and the like. The filter is often adopted in the casting production to filter and purify the molten metal so as to effectively filter and remove slag in the molten metal, simplify a pouring system, prevent the defect of slag holes, improve the mechanical property of the casting and reduce the machining allowance of the casting.

A certain large-scale wind power circular ring casting is large in size, large in integral thickness and height, and meanwhile, as the large-scale wind power circular ring casting is an important bearing part in wind power equipment, the large-scale wind power circular ring casting has high requirements on the casting molding quality. When the existing pouring process is adopted for molding, the molding quality of the casting is often difficult to ensure; and a large amount of chilling blocks are required to be arranged in the pouring cavity, the operation process is complex, and the labor intensity is high.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the above-mentioned technical problem who exists among the current large-scale ring casting pouring process, provide a large-scale annular casting gating system.

In order to solve the technical problem, the utility model discloses a technical scheme as follows:

the large-scale annular casting pouring system comprises a sprue arranged on the outer side of a pouring cavity, a first cross gate arranged at the bottom of the pouring cavity and a pouring sand core arranged in the pouring cavity, wherein the pouring sand core is positioned at the center and provided with a pouring gate inlet, a plurality of second cross gates are arranged on the pouring sand core along the radial direction of the pouring sand core, one end of each second cross gate is connected to the pouring gate inlet, the end part of the other end of each second cross gate is provided with a filter, at least one pouring pipe is arranged on each filter, and the other end of each pouring pipe is connected to the pouring cavity.

In the above technical scheme, further, two pouring pipes are respectively arranged on the filter, the pouring pipes are symmetrically arranged along the corresponding second horizontal runners, inlets of the pouring pipes are respectively located at the bottom of the filter, and inlets of the two pouring pipes are respectively symmetrically arranged at two sides of the corresponding second horizontal runners at intervals.

Among the above-mentioned technical scheme, furtherly, filter upper portion is the cuboid structure, and the filter lower part is square frustum structure, the horizontal cross sectional area of filter lower part is less than the horizontal cross sectional area on filter upper portion.

In the technical scheme, further, the end faces at two ends of the pouring cavity are respectively provided with a chilling block assembly.

In the technical scheme, furthermore, a plurality of heat-insulating risers and a plurality of air outlet risers are uniformly distributed on the upper end surface of the casting cavity along the circumferential direction of the upper end surface, and the number of the heat-insulating risers and the number of the air outlet risers are the same as that of the second cross runners.

In the above technical scheme, further, the heat-insulating risers are respectively located between two adjacent second runners, and the gas outlet risers are respectively located on extension lines of the second runners.

The utility model discloses the beneficial effect who has:

1) through setting up the pouring gate structure in the gating system, guarantee that the molten metal can flow into the pouring die cavity evenly, steadily in the pouring process, the molten metal is to the impact of die cavity, psammitolite when reducing the casting forming, guarantees foundry goods shaping quality.

2) The utility model discloses in set up the second cross gate on watering the psammitolite, make whole the gating system water the structure simpler, reduced the casting moulding technology degree of difficulty.

3) The utility model discloses in through set up the filter between watering and pouring tube, the filter can provide effectual buffering space to the molten metal fluid when carrying out filtration treatment to the molten metal, prevents the production of vortex, turbulent flow to effectively avoid the production of defects such as loose in the foundry goods, shrinkage cavity, further improved foundry goods shaping quality.

4) Through optimizing the runner of the gating system, no chill needs to be arranged in the cavity, the number of the heat-insulating risers can be reduced, and the labor intensity and the complexity of the process operation are greatly reduced.

Drawings

Fig. 1 is the structural schematic diagram of the pouring system of the present invention.

Fig. 2 is the connection schematic diagram of the pouring channel structure in the pouring system of the present invention.

Fig. 3 is a top view of the structure of the gating system of the present invention.

Fig. 4 is a schematic sectional view taken along line a-a in fig. 3.

In the figure: 101. the sprue gate structure comprises a sprue gate, 102, a first cross gate, 103, a sprue gate sand core, 131, a sprue gate inlet, 104, a second cross gate, 106, a pouring pipe, 107, a filter, 108, a chill assembly, 109, a heat-insulating riser, 110 and a gas outlet riser;

200. and (5) pouring the cavity.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the large annular casting pouring system in the embodiment includes a sprue 101 disposed outside a pouring cavity 200, a first runner 102 disposed at the bottom of the pouring cavity, and a runner core 103 disposed in the pouring cavity, wherein the sprue 101 is disposed vertically, and the sprue 101 is connected to the first runner 102. A pouring gate inlet 131 is formed in the center of the pouring gate sand core 103, six second cross gates 104 are arranged on the pouring gate sand core 103 along the radial direction of the pouring gate sand core, one ends of the second cross gates 104 are respectively connected to the pouring gate inlet 131, the end portions of the other ends of the second cross gates are provided with filters 107, the filters 107 are respectively provided with a pouring pipe 106, and the other ends of the pouring pipes 106 are respectively connected to the pouring cavity 200.

In this embodiment, two pouring tubes 106 are respectively disposed on the filter 107, the pouring tubes 106 are symmetrically disposed along the corresponding second runner 104, inlets of the pouring tubes 106 are respectively located at the bottom of the filter 107, and inlets of the two pouring tubes 106 are respectively symmetrically disposed at two sides of the corresponding second runner at intervals. The pouring tube 106 herein is a ceramic tube. Two pouring pipes are respectively arranged on each filter, and the sum of the sectional areas of the two pouring pipes is smaller than the horizontal sectional area of the filter, so that a certain pouring pressure is always kept in the pouring pipes, and the metal liquid can be ensured to fill the whole pouring cavity. Because the entrances of two pouring pipes set up in the filter bottom, the entrance of pouring pipe is the return bend structure, and the metal liquid can avoid producing vortex, turbulent problem at the entrance when entering into the pouring pipe through the pouring pipe entry in the filter.

As shown in fig. 3, in the present embodiment, the upper portion of the filter 107 is a rectangular parallelepiped structure, the lower portion of the filter 107 is a square frustum structure, the horizontal cross-sectional area of the lower portion of the filter 107 is smaller than that of the upper portion of the filter, so that the molten metal entering the filter is buffered, and meanwhile, a step structure is formed between the upper portion and the lower portion of the filter, which facilitates the arrangement of the filter screen in the filter.

Be located and have laid chill subassembly 108 on pouring die cavity 200 both ends terminal surface respectively, here need not set up the chill subassembly in that the pouring die cavity is inside, only need in the position department of pouring die cavity internal portion structure sudden change set up the chill can to guarantee the shaping quality of sudden change structure position department, compare in current gating system and need lay the mode of chill subassembly structure at pouring die cavity inner surface, greatly reduced the operation degree of difficulty of pouring construction.

Six heat-insulating risers 109 and six air outlet risers 110 are uniformly distributed on the upper end surface of the casting cavity 200 along the circumferential direction, and the number of the heat-insulating risers 109 and the number of the air outlet risers 110 are the same as that of the second cross runners 104. The insulated risers 109 are respectively positioned between two adjacent second cross runners 104, and the air outlet risers 110 are respectively positioned on the extension lines of the second cross runners 104. The pouring gate structure is arranged in the pouring system, so that the number of heat-insulating risers and air outlet risers in the system can be reduced, compared with the existing structure, the number of the heat-insulating risers can be reduced by more than half under the condition of ensuring the quality of pouring molding, and the integral structure of the pouring system can be simplified.

The present invention is not limited to the above description and drawings, but should be understood as being illustrative and not restrictive, and the technical features can be replaced and modified without creative efforts by those skilled in the art according to the technical content disclosed, all falling within the scope of the present invention.

Claims

1. The large-scale annular casting pouring system is characterized by comprising a sprue arranged on the outer side of a pouring cavity, a first cross gate arranged at the bottom of the pouring cavity and a pouring sand core arranged in the pouring cavity, wherein the pouring sand core is positioned at the center and provided with a pouring gate inlet, a plurality of second cross gates are arranged on the pouring sand core along the radial direction of the pouring sand core, one ends of the second cross gates are respectively connected to the pouring gate inlet, the end parts of the other ends of the second cross gates are provided with a filter, at least one pouring pipe is respectively arranged on the filter, and the other ends of the pouring pipes are respectively connected to the pouring cavity.

2. The large annular casting gating system according to claim 1, wherein the filters are provided with two gate tubes, the gate tubes are symmetrically arranged along the corresponding second runners, the inlets of the gate tubes are respectively positioned at the bottom of the filters, and the inlets of the two gate tubes are respectively symmetrically arranged at two sides of the corresponding second runners at intervals.

3. The large annular casting gating system of claim 2, wherein the upper filter portion is of a cuboid structure and the lower filter portion is of a square frustum structure, and the horizontal cross-sectional area of the lower filter portion is smaller than the horizontal cross-sectional area of the upper filter portion.

4. The large annular casting pouring system according to claim 1, wherein chill assemblies are respectively arranged on end faces at two ends of the pouring cavity.

5. The large-scale annular casting pouring system according to claim 1 or 4, wherein a plurality of heat-insulating risers and a plurality of air outlet risers are uniformly distributed on the upper end surface of the pouring cavity along the circumferential direction of the pouring cavity, and the number of the heat-insulating risers and the number of the air outlet risers are the same as that of the second cross runners.

6. The large annular casting gating system according to claim 5, wherein the heat insulating risers are respectively located between two adjacent second runners, and the air outlet risers are respectively located on extension lines of the second runners.