Gas-driven slag charge adding device for die casting

Abstract

The utility model discloses a gas-driven slag feeding device for die casting, which comprises a slag bin, a feeding pipe, a feeding trolley, a collecting device and an air feeding pipe, a base is arranged at the lower part of the slag bin, the bottom of the base is fixed at the top of the feeding trolley, and universal wheels are arranged at the bottom of the feeding trolley; a discharging pipe is arranged at the bottom of the slag bin, a slag bin cover is arranged at the top of the slag bin, a partition plate is arranged in the slag bin, and the two sides of the partition plate are connected to the inner wall of the slag bin respectively. The right end of the feeding pipe is connected with a side pipe of the material collecting device, and the left end of the feeding pipe is connected with the air feeding pipe; a pneumatic connector is arranged at the left end of the air supply pipe and provided with an air source valve. The material collecting device comprises a main cylinder and a side pipe, the top end of the main cylinder is closed, the bottom end is open, and the right end of the side pipe is connected to the side wall of the main cylinder. According to the utility model, the potential safety hazard of manual auxiliary material adding is solved, and the factors such as inaccurate control of manual material adding time and unstable material adding amount are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of mould casting tools, and particularly relates to a gas-driven slag adding device for mould casting. BACKGROUND

[0002] Mould casting ingot is an important blank for producing large forgings. Since a protective slag is used in the process of ingot casting, the protective slag can quickly melt and cover the upper surface of the molten steel in the ingot mould, which not only plays a role in heat preservation and preventing secondary oxidation of molten steel, but more importantly, improves the surface quality of the ingot. Therefore, protective slags with various properties are widely used in ingot casting.

[0003] At present, the protective slag is added by the methods of hanging in the mould before casting or laying on the bottom of the mould before casting. Both the above-mentioned methods have the problems of needing to add the protective slag manually for multiple times during casting, inaccurate amount and timing of addition, and unstable addition position, which leads to defects such as bottom underfilling, slag groove, slag inclusion and cracks in the cast ingot, and affects the subsequent processing of the ingot.

[0004] At the end of casting, a powdery heat generating agent needs to be added to the ingot riser. The heat generating agent is usually added manually in small packages, and the operation process has a certain risk coefficient. In addition, manual addition of the heat generating agent will impact the un-solidified molten steel in the ingot riser to different degrees, causing crystallization rain to fall to the ingot body, affecting the solidification quality of the product, and having adverse consequences on the subsequent product flaw detection. SUMMARY

[0005] The utility model aims at providing a gas-driven slag adding device for mould casting, which solves the safety hazards of manual addition of auxiliary materials, and reduces the factors of inaccurate control of addition timing and unstable amount of material addition.

[0006] The gas-driven slag adding device for mould casting comprises a slag bin, a feeding pipe, a feeding trolley, a material collecting device, and a gas pipe. A base is arranged at the lower part of the slag bin, the bottom of the base is fixed to the top of the feeding trolley, and universal wheels are arranged at the bottom of the feeding trolley. A discharging pipe is arranged at the bottom of the slag bin, a slag bin cover is arranged at the top of the slag bin, a partition plate is arranged inside the slag bin, and the partition plate is connected to the inner wall of the slag bin at both sides. The discharging pipe is connected to the feeding pipe in an inclined manner, the right end of the feeding pipe is connected to the side pipe of the material collecting device, and the left end of the feeding pipe is connected to the gas pipe. A pneumatic connector is arranged at the left end of the gas pipe, and a gas source valve is arranged at the pneumatic connector. The material collecting device comprises a main cylinder and a side pipe. The top end of the main cylinder is closed, the bottom end is open, and the right end of the side pipe is connected to the side wall of the main cylinder.

[0007] Further, the left end of the side pipe is inclined downward at an angle of 15° to 60°.

[0008] Further, a blow-off port is arranged on the side wall of the main cylinder, and a filter screen is arranged at the blow-off port.

[0009] Further, the air pipe is provided with an air pressure gauge.

[0010] Further, the lower part of the discharging pipe is inclined to the direction of the material collecting device on the right side.

[0011] Further, one end of the slag bin cover is hinged to the top of the slag bin, and the other end is provided with a locking device.

[0012] Further, the bottom of the feeding trolley is provided with at least three universal wheels.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] When the utility model is used, the slag bin is used to place protective slag or powder materials such as heat generating agents, the discharging pipe at the lower part of the bin is connected with the feeding pipe, when the valve of the feeding pipe is opened, the gas pushes the powder materials in the discharging pipe to the material collecting device at the other end of the feeding pipe, the powder materials slide downward and fall on the top of the molten steel in the ingot mold. The safety hidden danger of manually adding auxiliary materials in the past is solved, the factors such as inaccurate control of time and unstable material adding amount when manually adding materials are reduced, the generation of defects such as insufficient meat at the bottom of the ingot, slag groove, slag inclusion and cracks is reduced, and the solidification quality of the mold casting ingot is improved.

[0015] The problem of flaw inclusion defects caused by ingot pouring is reduced, and considerable economic benefits can be obtained. After being applied to production practice, the flaw defects are reduced, the quality risk is reduced, and the qualified rate of ingots is improved by 0.05%. Taking 100,000 tons of molten steel per year as an example, the average price of ton steel is 500,000 yuan, the utilization rate of ingots is 30%, and the economic benefits can be saved: 100,000 tons * 30% * 0.05% * 500,000 yuan / ton = 7,500,000 yuan. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the gas-driven slag adding device for mold casting in the utility model;

[0017] Figure 2 is a structural schematic view of the material collecting device in the utility model;

[0018] Figure 3 is a use state schematic view of the gas-driven slag adding device for mold casting in the utility model. DETAILED DESCRIPTION

[0019] The following description fully shows the specific implementation scheme of the utility model, so that those skilled in the art can practice and reproduce.

[0020] As shown in Figure 1 , it is a structural schematic view of the gas-driven slag adding device for mold casting in the utility model; as shown in Figure 2 , it is a structural schematic view of the material collecting device 4 in the utility model.

[0021] A gas-driven slag feeding device for die casting includes: a slag silo 1, a feeding pipe 2, a feeding cart 3, a collecting device 4, and an air supply pipe 5. The slag silo 1 has a base 11 at its lower part, and the bottom of the base 11 is fixed to the top of the feeding cart 3. The bottom of the slag silo 1 has a discharge pipe 12, and the top of the slag silo 1 has a slag silo cover 13. The slag silo 1 has a partition 15 inside, and the two sides of the partition 15 are connected to the inner wall of the slag silo 1. The discharge pipe 12 is obliquely connected to the feeding pipe 2. The right end of the feeding pipe 2 is connected to the side pipe 41 of the collecting device 4, and the left end is connected to the air supply pipe 5. The collecting device 4 includes: a main cylinder 41 and a side pipe 41. The top of the main cylinder 41 is closed and the bottom is open. The right end of the side pipe 41 is connected to the side wall of the main cylinder 41.

[0022] The left end of the side pipe 41 slopes downward with an angle of inclination α of 15° to 60°. An air outlet is provided on the side wall of the main cylinder 41, and a filter screen is installed at the air outlet.

[0023] A pneumatic connector 51 is provided at the left end of the air supply pipe 5. The pneumatic connector 51 is equipped with an air source valve 52. The air supply pipe 5 is equipped with an air pressure gauge 53. The pneumatic connector 51 is used to connect to the air source.

[0024] The lower part of the feed pipe 12 is inclined towards the right-side collecting device 4.

[0025] One end of the slag bin cover 13 is hinged to the top of the slag bin 1, and the other end is equipped with a locking device 14.

[0026] The bottom of the feeding trolley 3 is equipped with at least three casters 31, and the distance between the lower opening of the material collection device 4 and the center of the inner cavity of the steel ingot mold can be adjusted by the feeding trolley 3.

[0027] like Figure 3 The diagram shown is a schematic diagram of the gas-driven slag feeding device for die casting in this utility model.

[0028] Protective slag or heating agent can be added to the slag hopper 1. When the gas source valve 52 is opened, gas is injected into the gas delivery pipe 5 and the feeding pipe 2. Under the pneumatic push, the slag 6 flowing from the discharge pipe 12 to the discharge pipe 2 is pushed to the collecting device 4 and sprayed out through the bottom opening of the main cylinder 41. The slag 6 falls downwards onto the top of the molten steel in the ingot mold. This solves the safety hazards caused by manually adding auxiliary materials and the problems of crystallization rain caused by the impact and vibration of manually added materials on the surface of the molten steel, which affects the solidification quality of the ingot. Four universal wheels are installed under the feeding cart 3. The distance between the collecting device 4 and the center of the inner cavity of the ingot mold can be adjusted through the feeding cart 3.

[0029] Example 1: The slag material 6 used is protective slag.

[0030] Before the ingot casting, the slag material bin 1 is cleaned, and the required protective slag is poured into the slag material bin 1 according to the process requirements, the height of the protective slag needs to exceed the height of the middle partition plate 15 in the slag material bin 1, the weight of the protective slag is added according to the weight mark in the slag material bin 1, after the addition of the protective slag is completed, the slag material bin cover 13 is covered, and the locking device 14 is locked.

[0031] Before the ingot casting, the external gas source is connected with the pneumatic joint 51, the gas source valve 52 is opened to check the pressure of the pressure gauge 53, the pressure is required to be ≮0.5MPa, and whether the pneumatic joint 51 leaks is checked, and after the detection is completed, the gas source valve 52 is closed.

[0032] After the above work is completed, the slag amount is debugged, the gas source valve 52 is opened, the opening degree of the gas source valve 52 is adjusted, the slag amount of the discharging pipe 12 to the feeding pipe 2 is adjusted, and whether the slag amount of the protective slag at the lower end outlet of the material collecting device 4 is adapted to the set amount is observed.

[0033] Before the ingot casting, the gas-driven protective slag is added for debugging.

[0034] After the ingot casting starts, the feeding trolley 3 is pushed according to the operation requirement, and the lower end outlet of the material collecting device 4 is adjusted to be aligned with the center of the inner cavity of the ingot mold.

[0035] The gas source valve 52 is opened, the pressure display of the pressure gauge 53 is observed, the gas source pressure is adjusted, and the slag amount of the protective slag at the lower end outlet of the material collecting device 4 is controlled in a reasonable range. During the ingot casting process, the slag amount can be adjusted according to the molten slag in the ingot mold.

[0036] When the ingot casting reaches the riser, the slag amount at the upper end of the ingot riser is observed, if the protective slag does not need to be added, the material collecting device 4 should be moved out of the upper end of the ingot mold.

[0037] In example 2, the slag material 6 used is a heating agent.

[0038] The detection and preparation steps before casting are the same as those in example 1.

[0039] In the later stage of the ingot casting, when the molten steel liquid surface reaches the casting height of the riser, the heating agent is added to the ingot riser, after the addition of the heating agent is completed, the material collecting device 4 is moved out of the upper end of the ingot mold.

[0040] The terms used in the utility model are illustrative and non-limiting terms. Since the utility model can be embodied in various forms without departing from the spirit or essence of the technical scheme, it should be understood that the above examples are not limited to any of the above details, but should be widely interpreted within the spirit and scope defined by the appended claims, and therefore all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A gas-driven slag feeding device for die casting, characterized by comprising: The utility model relates to a slag bin, a feeding pipe, a feeding trolley, a material collecting device, a gas feeding pipe, a base is arranged at the lower part of the slag bin, the bottom of the base is fixed at the top of the feeding trolley, universal wheels are arranged at the bottom of the feeding trolley, a discharging pipe is arranged at the bottom of the slag bin, a slag bin cover is arranged at the top of the slag bin, a partition is arranged in the slag bin, the partition is connected to the inner wall of the slag bin on both sides, the discharging pipe is connected to the feeding pipe in an inclined manner, the right end of the feeding pipe is connected to the side pipe of the material collecting device, and the left end is connected to the gas feeding pipe, a pneumatic connector is arranged at the left end of the gas feeding pipe, the pneumatic connector is provided with a gas source valve, the material collecting device comprises a main cylinder and a side pipe, the top end of the main cylinder is closed, the bottom end is open, and the right end of the side pipe is connected to the side wall of the main cylinder. The left end of the side pipe is inclined downward, and the inclination angle is 15-60 degrees.

2. The gas-operated slag feeder for die casting as set forth in claim 1, wherein The side wall of the main cylinder is provided with an air outlet, and the air outlet is provided with a filter screen.

3. The gas-operated slag feeder for die casting as set forth in claim 1, wherein The gas feeding pipe is provided with a gas pressure gauge.

4. The gas-operated slag feeder for die casting as set forth in claim 1, wherein The lower part of the discharging pipe is inclined to the right to the direction of the material collecting device.

5. The gas-operated slag feeder for die casting as set forth in claim 1, wherein One end of the slag bin cover is hinged to the top of the slag bin, and the other end is provided with a locking device.

6. The gas-operated slag feeder for die casting as set forth in claim 1, wherein At least three universal wheels are arranged at the bottom of the feeding trolley.

7. The gas-operated slag feeder for die casting as set forth in claim 1, wherein ​

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