Sand box

Abstract

The utility model discloses a sand box which comprises a sand box main body, the inner side of the sand box main body is fixedly connected with an inner sand box, a gas channel is arranged between the inner sand box and the sand box main body, the bottom end of one side of the sand box main body is fixedly connected with a fixed pipe, one end of the fixed pipe is provided with an external thread, and the other end of the fixed pipe is provided with an internal thread. And a connecting pipe is arranged outside one end of the fixed pipe. One end of the connecting pipe is provided with an internal thread, the external thread is in threaded fit with the internal thread, a bottom flange at one end of the connecting pipe is connected with a circulating pipe, and the bottom end of the circulating pipe is fixedly connected with an air pump. According to the utility model, the first vent hole and the second vent hole are formed, the evanescent mode casting mold is embedded into the sand box, then high-temperature molten iron is poured, and smoke can be generated in the pouring process and can actively permeate into the first vent hole through the second vent hole at the moment, so that the permeation of gas is facilitated, and meanwhile, the circulation of dry sand is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of casting sand boxes, in particular to a sand box. Background Art

[0002] When the lost foam casting process is used to produce the middle trough castings of mining scraper conveyors, the sand box is an indispensable tool for producing castings. Generally, the lost foam mold is buried in the sand box, and then filled with dry sand and vibrated. Due to the high-temperature molten iron pouring process, the foam model in the lost foam is gasified and a lot of smoke will be generated during the process, which needs to be discharged in time.

[0003] In the prior art, the flue gas is naturally infiltrated and circulated, resulting in most of the gas being discharged upward after the high-temperature molten iron is poured. During the pouring process, odor is generated, affecting the health of operators and operations, and it is not convenient to actively discharge the gas. Utility Model Content

[0004] The utility model aims to provide a sand box, in which smoke is generated during the pouring process. At this time, the smoke will actively penetrate through the second vent hole to the inside of the first vent hole. By providing a plurality of first vent holes and second vent holes, dry sand can be blocked, which facilitates the penetration of gas and prevents the circulation of dry sand.

[0005] To achieve the above-mentioned purpose, a sand box is provided, comprising: a sand box main body, an inner sand box is fixedly connected to the inner side of the sand box main body, a gas channel is provided between the inner sand box and the sand box main body, a fixing pipe is fixedly connected to the bottom end of one side of the sand box main body, an external thread is provided at one end of the fixing pipe, a connecting pipe is arranged on the outside of one end of the fixing pipe, an internal thread is provided at one end of the connecting pipe, the external thread and the internal thread are threaded together, a circulation pipe is connected to the bottom flange of one end of the connecting pipe, and an air pump is fixedly connected to the bottom end of the circulation pipe.

[0006] According to the sand box, a plurality of first vent holes are fixedly connected to the inner side of the inner sand box, a fixed frame is arranged outside the inner side of the first vent holes, and the fixed frame is fixedly connected to the inner sand box.

[0007] According to the sand box, a plurality of second ventilation holes are provided inside the fixed frame.

[0008] According to the sand box, support springs are fixedly connected to both sides of one inner end of the connecting pipe, a sealing ring is fixedly connected to one end of the support spring, and a flow port is opened in the middle of the sealing ring.

[0009] According to the sand box, the four corner edges above both ends of the sand box body are fixedly connected with lifting ears.

[0010] According to the sand box, handles are fixedly connected above the middle parts of both ends of the sand box body. Beneficial Effects

[0011] The utility model is provided with a first vent hole and a second vent hole, which are buried in a sand box through a lost foam casting mold, and then high-temperature molten iron is poured. During the pouring process, smoke is generated, and at this time, the smoke will actively penetrate through the second vent hole to the inside of the first vent hole. By providing a plurality of first vent holes and second vent holes, dry sand can be blocked, which facilitates the penetration of gas and prevents the circulation of dry sand.

[0012] The utility model is provided with a connecting pipe, a fixed pipe, a sealing ring and an air pump. The connecting pipe is threadedly connected to the fixed pipe. After the connection, the sealing ring is plugged and matched with the fixed pipe through the elastic support of the supporting spring to increase the sealing performance. The circulation pipe and the connecting pipe are flange-connected. The smoke generated by the internal gas channel of the sand box body is sucked and circulated through the air pump, enters the circulation pipeline through the connecting pipe, and is discharged through the output end of the air pump, thereby increasing the circulation of the smoke.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0015] Figure 1 This is a three-dimensional structural diagram of a sand box of the utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of a sand box of the utility model;

[0017] Figure 3 This is a disassembled structural diagram of a connecting pipe and a fixed pipe of a sand box of the utility model;

[0018] Figure 4 For this utility model Figure 1 A in the enlarged structure diagram.

[0019] Legend:

[0020] 1. Sand box body; 2. Lifting ear; 3. Handle; 4. Circulation pipe; 5. Air pump; 6. Connecting pipe; 7. First vent hole; 8. Inner sand box; 9. Gas channel; 10. External thread; 11. Internal thread; 12. Circulation port; 13. Support spring; 14. Sealing ring; 15. Second vent hole; 16. Fixed frame; 17. Fixed pipe. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0022] Reference Figure 1-4 The utility model embodiment provides a sand box, which includes: a sand box body 1, characterized in that an inner sand box 8 is fixedly connected to the inner side of the sand box body 1, a gas channel 9 is provided between the inner sand box 8 and the sand box body 1, a fixed pipe 17 is fixedly connected to the bottom end of one side of the sand box body 1, and the fixed pipe 17 is connected to the sand box body 1 through the fixed pipe 17 to control the circulation of internal gas, an external thread 10 is provided at one end of the fixed pipe 17, a connecting pipe 6 is provided on the outside of one end of the fixed pipe 17, and the connecting pipe 6 is threadedly connected to the fixed pipe 17, an internal thread 11 is provided at one end of the connecting pipe 6, and the external thread 10 and the internal thread 11 are threadedly matched, and the bottom of one end of the connecting pipe 6 A flow pipe 4 is connected to a flange, and a wind pump 5 is fixedly connected to the bottom end of the flow pipe 4. The flow pipe 4 and the connecting pipe 6 are connected by flanges. The smoke generated by the internal gas channel 9 of the sand box body 1 is sucked and circulated through the wind pump 5, and enters the flow pipe 4 through the connecting pipe 6 and is discharged through the output end of the wind pump 5. Support springs 13 are fixedly connected to both sides of one end of the connecting pipe 6. Through the elastic support of the support spring 13, the sealing ring 14 is plugged and matched with the fixed pipe 17 to increase the sealing performance. One end of the support spring 13 is fixedly connected to the sealing ring 14, and a flow port 12 is opened in the middle of the sealing ring 14, which facilitates the flow of gas.

[0023] A plurality of first air vents 7 are fixedly connected to the inner side of the inner sand box 8, a fixed frame 16 is provided on the inner and outer sides of the first air vents 7, and the fixed frame 16 and the inner sand box 8 are fixedly connected, and a plurality of second air vents 15 are opened inside the fixed frame 16. By moving the sand box body 1 to the position where it is required to be used, and burying it in the sand box through the lost foam casting, and then pouring high-temperature molten iron, smoke will be generated during the pouring process. At this time, the smoke will actively penetrate through the second air vents 15 and penetrate into the interior of the first air vents 7. The four corner edges above the two ends of the sand box body 1 are fixedly connected with ears 2, and the handles 3 are fixedly connected above the middle of the two ends of the sand box body 1.

[0024] Working principle: When in use, first move the sand box body 1 to the required position, bury it in the sand box through the lost foam casting, and then pour high-temperature molten iron. Smoke will be generated during the pouring process. At this time, the smoke will actively penetrate through the second vent 15 to the inside of the first vent 7, and then be threadedly connected to the fixed tube 17 through the connecting tube 6. After the connection, the sealing ring 14 is plugged and matched with the fixed tube 17 through the elastic support of the supporting spring 13 to increase the sealing performance. The circulation pipe 4 and the connecting pipe 6 are flange-connected, and the smoke generated in the internal gas channel 9 of the sand box body 1 is sucked and circulated through the air pump 5, and enters the circulation pipe 4 through the connecting pipe 6 and is discharged through the output end of the air pump 5.

[0025] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A sand box, comprising: A sand box body (1) is characterized in that an inner sand box (8) is fixedly connected to the inner side of the sand box body (1), a gas channel (9) is provided between the inner sand box (8) and the sand box body (1), a fixed pipe (17) is fixedly connected to the bottom end of one side of the sand box body (1), one end of the fixed pipe (17) is provided with an external thread (10), a connecting pipe (6) is arranged outside one end of the fixed pipe (17), one end of the connecting pipe (6) is provided with an internal thread (11), the external thread (10) and the internal thread (11) are threadedly matched, a bottom flange of one end of the connecting pipe (6) is connected to a circulation pipe (4), and the bottom end of the circulation pipe (4) is fixedly connected to an air pump (5).

2. A flask according to claim 1, characterized in that: A plurality of first ventilation holes (7) are fixedly connected to the inner side of the inner sand box (8), a fixed frame (16) is arranged outside the inner side of the first ventilation holes (7), and the fixed frame (16) and the inner sand box (8) are fixedly connected.

3. A flask according to claim 2, characterized in that: A plurality of second ventilation holes (15) are provided inside the fixing frame (16).

4. A flask according to claim 1, characterized in that: Support springs (13) are fixedly connected to both sides of one end of the connecting tube (6), a sealing ring (14) is fixedly connected to one end of the supporting spring (13), and a flow opening (12) is provided in the middle of the sealing ring (14).

5. A flask according to claim 1, characterized in that: Lifting ears (2) are fixedly connected to the four corner edges above both ends of the sand box body (1).

6. A flask according to claim 1, characterized in that: Handles (3) are fixedly connected to the upper middle parts of both ends of the sand box body (1).

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