A device for energy saving, cooling and dust removal of high temperature quartz sand in lost foam casting

Abstract

The invention discloses a device for energy-saving, cooling and dust removal of high-temperature quartz sand in lost foam casting, the device comprising a hot sand bin and a negative pressure separation device, the hot sand bin is used to transfer the high-temperature quartz sand to the negative pressure separation device, the negative pressure separation device is provided with a negative pressure pipeline, and the high-temperature quartz sand transferred is dusted and cooled through the negative pressure pipeline. The invention cools and removes dust by carrying high-temperature quartz sand with negative pressure airflow, not only has a fast cooling speed and good dust removal effect, but also has a simple structural design and good energy-saving effect.

Description

Technical Field

[0001] The invention relates to the technical field of cooling and dust removal equipment, and in particular to energy-saving cooling and dust removal equipment for lost foam casting of high-temperature quartz sand. Background Art

[0002] Lost foam casting is a relatively high-end casting process in my country at this stage, and sand treatment is an important link that determines the quality of castings. One is the dust content, and the other is the control of sand temperature. In the existing technology, the cooling method of sand treatment is to use a boiling cooling bed for the first cooling, and then transport it to the sand temperature regulator and cool it with cooling water. This cooling method is not only slow in cooling speed, but also not energy-saving. For this reason, according to the actual needs of production, a device dedicated to lost foam rapid energy-saving cooling and dust removal is designed. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a device for energy-saving, cooling and dust removal of lost foam casting high-temperature quartz sand.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a device for energy-saving, cooling and dust removal of high-temperature quartz sand in lost foam casting, the device comprising a hot sand bin and a negative pressure separation device, the hot sand bin is used to transfer the high-temperature quartz sand to the negative pressure separation device, the negative pressure separation device is provided with a negative pressure pipeline, which is used to remove dust and cool the transferred high-temperature quartz sand through its negative pressure pipeline.

[0005] Preferably, an inlet is provided above the hot sand bin, and high-temperature quartz sand enters the hot sand bin through the inlet. An outlet is provided at the bottom to transfer the high-temperature quartz sand to the negative pressure separation device. The bottom of the hot sand bin is inclined and inclined toward the negative pressure separation device.

[0006] Preferably, the negative pressure separation device includes a negative pressure pipe, a negative pressure separation cover, a separation plate and a louver. The negative pressure pipe is in an inverted "L" shape. The negative pressure separation cover is a closed cover body provided with an air outlet and a sand outlet, and its interior is divided into a first cavity and a second cavity by a partition. A louver oblique to the first cavity is provided in the middle of the partition. The vertical section of the negative pressure pipe is passed through the first cavity. The separation plate spacing is set above the opening of the vertical section of the negative pressure pipe. The horizontal section of the negative pressure pipe is connected to the warehouse outlet, and an air inlet is provided on the horizontal section. The sand outlet is provided at the bottom of the first cavity, and the air outlet is provided at the top of the second cavity.

[0007] Preferably, the separation plate is bent.

[0008] Preferably, the inner diameter of the horizontal section of the negative pressure tube is smaller than the inner diameter of the vertical section.

[0009] The present invention has the following beneficial effects:

[0010] The present invention uses negative pressure airflow to carry high-temperature quartz sand to perform cooling and dust removal, which not only has a fast cooling speed and a good dust removal effect, but also has a simple structural design and is energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 : A schematic diagram of the structure of the present invention;

[0012] Legend: hot sand bin 1, bin inlet 11, bin outlet 12, negative pressure separation device 2, negative pressure pipe 21, horizontal section 211, air inlet 2111, vertical section 212, negative pressure separation cover 22, air outlet 221, sand outlet 222, first cavity 223, second cavity 224, separation plate 23, partition 24, louver 241. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0014] Reference Figure 1 (wherein, the direction of the arrow is the direction of airflow), an embodiment provided by the present invention: a device for energy-saving, cooling and dust removal of high-temperature quartz sand in lost foam casting, the device comprising a hot sand bin 1 and a negative pressure separation device 2, the hot sand bin 1 is used to transfer the high-temperature quartz sand to the negative pressure separation device, the negative pressure separation device 2 is provided with a negative pressure pipeline, which is used to remove dust and cool the transferred high-temperature quartz sand through its negative pressure pipeline.

[0015] In this embodiment, as a preference, an inlet 11 for turning the cast high-temperature quartz sand into the hot sand bin 1 is provided above the hot sand bin 1, and an outlet 12 for transferring the high-temperature quartz sand to the negative pressure separation device 2 is provided at the bottom thereof. The bottom of the hot sand bin 1 is inclined and inclined toward the negative pressure separation device 2, which is conducive to the high-temperature quartz stone automatically flowing out of the outlet 12 by virtue of its gravity.

[0016] In this embodiment, as a preference, the negative pressure separation device 2 includes a negative pressure pipe 21, a negative pressure separation cover 22, a separation plate 23 and a louver 241, wherein the negative pressure pipe 21 is an inverted "L"-shaped seamless steel pipe, and the negative pressure separation cover 22 is a closed cover body provided with an air outlet 221 and a sand outlet 222, the interior of which is divided into a first cavity 223 and a second cavity 224 by a partition 24, and a louver 241 oblique to the first cavity 223 is provided in the middle of the partition 24, and the inclined louver 24 1 can prevent quartz sand from entering the second cavity 224, the vertical section 212 of the negative pressure pipe 21 is arranged in the first cavity 223, the separation plate 23 is arranged above the opening of the vertical section 212 of the negative pressure pipe 21, the bottom of the first cavity 223 is provided with the sand outlet 222, the top of the second cavity 224 is provided with the air outlet 221, the horizontal section 211 of the negative pressure pipe 21 is connected with the warehouse outlet 12, and the horizontal section 211 is provided with an air inlet 2111.

[0017] In this embodiment, preferably, the separation plate 23 is in a bent shape, and the bent separation plate 23 can separate the quartz sand flushed out of the negative pressure tube 21 from the negative pressure tube 21 and enter the first cavity 223 .

[0018] In this embodiment, preferably, the inner diameter of the horizontal section 211 of the negative pressure pipe 21 is smaller than the inner diameter of the vertical section 212, so that the high-temperature quartz sand flowing through the horizontal section 211 of the negative pressure pipe 21 can be quickly cooled down, and the quartz sand can be quickly cooled down and dusted when flowing through the vertical section 212.

[0019] Working principle:

[0020] The casting temperature of gray iron is: 1450-1500 degrees. After 30 minutes, the castings and the high-temperature quartz sand are directly turned over to the inlet 11 of the hot sand bin 1. At this time, the castings are blocked by the grille, and the high-temperature quartz sand falls into the hot sand bin 1. Its temperature reaches 800 degrees at the highest and 600 degrees at the lowest. The high-temperature quartz sand in the hot sand bin 1 naturally flows to the horizontal section 211 of the negative pressure pipe 21 because the bottom of the hot sand bin 1 is inclined. Since the horizontal section 211 of the negative pressure pipe 21 is provided with an air inlet 2111, the high-temperature quartz sand flows through the air inlet 2111 and mixes with the normal temperature air. When the high-temperature quartz sand reaches the end of the horizontal section 211, the high-temperature quartz sand has been cooled by more than 50%. When the high-temperature quartz sand enters the vertical section 212 from the horizontal section 211, the quartz sand impacts the separation plate 23 at high speed driven by the negative pressure airflow. At this time, the dust wrapped in the quartz sand has been centrifuged at high speed, and the dust has fallen off. The temperature drops to less than 50 degrees. The quartz sand is pulled by the air pressure to the side of the separation plate 23 against the second cavity 224, and naturally falls to the bottom of the negative pressure separation cover 22 and flows out through the sand outlet 222, while the hot air and dust pass through the louver 241 to the air outlet 221. The air outlet 221 is connected to the negative pressure central dust removal system, so the hot air and dust are discharged into the negative pressure central dust removal system through the air outlet 221, wherein the quartz sand after dust removal and cooling can be recycled again.

[0021] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy-saving, cooling and dust-removing device for lost foam casting of high-temperature quartz sand, characterized in that: The equipment comprises a hot sand bin and a negative pressure separation device, wherein the hot sand bin is used to transfer high-temperature quartz sand to the negative pressure separation device, and the negative pressure separation device is provided with a negative pressure pipeline for removing dust and cooling the transferred high-temperature quartz sand through its negative pressure pipeline; an inlet is provided above the hot sand bin, and the high-temperature quartz sand enters the hot sand bin through the inlet, and an outlet is provided at the bottom of the hot sand bin for transferring the high-temperature quartz sand to the negative pressure separation device, and the bottom of the hot sand bin is inclined and inclined toward the negative pressure separation device; the negative pressure separation device comprises a negative pressure pipe, a negative pressure separation cover, a separation plate and a vacuum pump; The blade plate, the negative pressure pipe is in an inverted "L" shape, the negative pressure separation cover is a closed cover body with an air outlet and a sand outlet, the interior of which is divided into a first cavity and a second cavity by a partition, and a louver plate inclined to the first cavity is provided in the middle of the partition, the vertical section of the negative pressure pipe is passed through the first cavity, the separation plate spacing is set above the opening of the vertical section of the negative pressure pipe, the horizontal section of the negative pressure pipe is connected to the warehouse outlet, the horizontal section is provided with an air inlet, the bottom of the first cavity is provided with the sand outlet, and the top of the second cavity is provided with the air outlet; the inner diameter of the horizontal section of the negative pressure pipe is smaller than the inner diameter of the vertical section.

2. The device for energy saving, cooling and dust removal of high temperature quartz sand in lost foam casting according to claim 1 is characterized in that: The separation plate is in a bent shape.

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