Heating device for low-pressure casting

Abstract

The utility model relates to the technical field of low-pressure casting, in particular to a heating device for low-pressure casting, which comprises a plurality of heating pipes, a coal gas feeding pipe and an oxygen feeding pipe, the plurality of heating pipes are spliced in the same plane to form a heating pipe frame with mutually communicated internal spaces, and a plurality of first heating holes are formed in the top surface and the bottom surface of the heating pipe frame at intervals; each first heating hole is communicated with the inner space of the heating pipe frame, more than three supporting legs are arranged on the outer edge of the bottom of the heating pipe frame at intervals, one end of the coal gas feeding pipe is a coal gas feeding port, the other end of the coal gas feeding pipe is communicated with the heating pipe frame, one end of the oxygen feeding pipe is an oxygen feeding port, and the other end of the oxygen feeding pipe is communicated with the heating pipe frame. During use, the heating pipe frame is supported above the mold through the supporting legs, then mixed gas of coal gas and oxygen is ignited, flames are sprayed out from the first heating holes, and therefore the flames can be sprayed to a plurality of positions of the mold below for heating, the mold is heated evenly, and the casting quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of low-pressure casting technology, and in particular to a heating device for low-pressure casting. Background Technology

[0002] When casting with low-pressure molds, the mold temperature needs to be heated to 350℃-400℃ by a heating device before normal casting production can begin. However, most current heating devices only have one heating nozzle. When the casting to be poured is large, it is easy to cause uneven heating of the mold, resulting in poor casting quality. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a heating device for low-pressure casting that enables uniform heating of the mold.

[0004] The present invention adopts the following technical solution:

[0005] This utility model provides a heating device for low-pressure casting, including a heating tube, a gas inlet pipe, and an oxygen inlet pipe. Multiple heating tubes are spliced ​​together in the same plane to form a heating tube frame with interconnected internal spaces. Multiple first heating holes are spaced apart on the top and bottom surfaces of the heating tube frame, and each first heating hole is connected to the internal space of the heating tube frame. Three or more support legs are spaced apart on the bottom outer edge of the heating tube frame. One end of the gas inlet pipe is a gas inlet, and the other end is connected to the heating tube frame. One end of the oxygen inlet pipe is an oxygen inlet, and the other end is connected to the heating tube frame.

[0006] Preferably, on the heating tube rack, any first heating hole on the top surface is coaxially opposite to a first heating hole on the bottom surface.

[0007] Preferably, the diameter of the first heating hole is 2 mm or more.

[0008] Preferably, a gate heating pipe extends downward from the bottom surface of the heating tube rack, the gate heating pipe is connected to the heating tube rack, and the part of the gate heating pipe inserted into the gate is provided with a plurality of second heating holes spaced apart around the circumference, each of the second heating holes being connected to the interior of the gate heating pipe.

[0009] Preferably, a flow control valve is installed at the oxygen inlet of the oxygen feed pipe.

[0010] Preferably, one oxygen feed pipe and two gas feed pipes are connected to the same heating pipe, and the oxygen feed pipe is located on the axis of symmetry of the heating pipe rack, while the two gas feed pipes are symmetrically arranged on both sides of the oxygen feed pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] In use, the heating device for low-pressure casting of this utility model has a heating tube frame supported above the mold by support legs. Gas is introduced through the gas inlet and oxygen through the oxygen inlet. The mixture of gas and oxygen is then ignited, and a high-temperature flame is ejected from the first heating hole. The top and bottom surfaces of the heating tube frame are provided with multiple first heating holes spaced apart, so that flames can be sprayed onto multiple positions of the mold below for heating, so that the mold is heated evenly and the quality of the casting is guaranteed. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the heating device for low-pressure casting in this embodiment of the present invention.

[0014] Figure 2 This is a schematic diagram of the heating device for low-pressure casting in use in an embodiment of this utility model.

[0015] The reference numerals in the attached figures are explained as follows:

[0016] 1. Heating element; 4. Heating element support

[0017] 2. Gas inlet pipe; 5. Support legs

[0018] 201. Gas inlet; 6. Mold

[0019] 3. Oxygen feed pipe; 7. Gate heating pipe

[0020] 301. Oxygen inlet 8. Flow control valve Detailed Implementation

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0022] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] See Figure 1 This embodiment provides a heating device for low-pressure casting, including a heating pipe 1, a gas inlet pipe 2, and an oxygen inlet pipe 3. Multiple heating pipes 1 are spliced ​​together in the same plane to form a heating pipe frame 4 with interconnected internal spaces. Multiple first heating holes are spaced apart on the top and bottom surfaces of the heating pipe frame 4. Each first heating hole is connected to the internal space of the heating pipe frame 4. Three or more support legs 5 are spaced apart on the bottom outer edge of the heating pipe frame 4. One end of the gas inlet pipe 2 is a gas inlet 201, and the other end is connected to the heating pipe frame 4. One end of the oxygen inlet pipe 3 is an oxygen inlet 301, and the other end is connected to the heating pipe frame 4.

[0026] See Figure 1 and Figure 2 In this embodiment, the heating device for low-pressure casting is used such that the heating tube frame 4 is supported above the mold 6 by the support legs 5, and gas is introduced from the gas inlet 201 and oxygen is introduced from the oxygen inlet 301. The mixture of gas and oxygen is then ignited, and a high-temperature flame is ejected from the first heating hole. The top and bottom surfaces of the heating tube frame 4 are provided with multiple first heating holes spaced apart, so that flames can be sprayed onto multiple positions of the mold 6 below for heating, so that the mold 6 is heated evenly and the quality of the casting is guaranteed.

[0027] Preferably, on the heating tube frame 4, any first heating hole on the top surface is coaxially opposite to a first heating hole on the bottom surface, so as to enhance the heat radiation effect of the first heating hole on the top surface of the heating tube frame 4 and make the heat more effectively transferred to various parts of the mold 6.

[0028] Preferably, the diameter of the first heating hole is 2mm or more to increase the heat radiation area and improve the heating efficiency of the mold 6.

[0029] Preferably, see Figure 1 and Figure 2A gate heating pipe 7 extends downward from the bottom surface of the heating pipe frame 4. The gate heating pipe 7 is connected to the heating pipe frame 4. The portion of the gate heating pipe 7 that inserts into the gate has multiple second heating holes spaced apart around its circumference. Each second heating hole is connected to the interior of the gate heating pipe 7. The gate heating pipe 7 can directly deliver a high-temperature flame into the gate through the second heating holes, further ensuring uniform heating of the mold 6 and improving the quality of the casting.

[0030] Preferably, see Figure 1 The oxygen feed pipe 3 is equipped with a flow control valve 8 at the oxygen inlet 301. The flow control valve 8 can adjust the mixture ratio of coal gas and oxygen to adjust the size and color of the flame, thereby controlling the flame temperature and ensuring that the mold 6 is heated evenly.

[0031] Preferably, see Figure 1 and Figure 2 An oxygen feed pipe 3 and two gas feed pipes 2 are all connected to the same heating pipe 1, with the oxygen feed pipe 3 located on the axis of symmetry of the heating pipe frame 4, and the two gas feed pipes 2 symmetrically arranged on both sides of the oxygen feed pipe 3. Through the symmetrical arrangement of the heating pipe frame 4 and the two gas feed pipes 2 relative to the oxygen feed pipe 3, the heating device for low-pressure casting in this embodiment can obtain a higher concentration of gas and oxygen mixture within the heating pipe frame 4, ensuring flame intensity and improving the heating efficiency of the mold 6.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A heating device for low pressure casting, characterized by, The device comprises heating pipes (1), a gas feeding pipe (2) and an oxygen feeding pipe (3). A plurality of the heating pipes (1) are spliced in the same plane to form a heating pipe rack (4) with internal spaces in communication with each other. The top and bottom surfaces of the heating pipe rack (4) are both provided with a plurality of first heating holes at intervals. Each of the first heating holes is in communication with the internal space of the heating pipe rack (4). The bottom outer edge of the heating pipe rack (4) is provided with more than three supporting legs (5). One end of the gas feeding pipe (2) is a gas feeding port (201), and the other end is in communication with the heating pipe rack (4). One end of the oxygen feeding pipe (3) is an oxygen feeding port (301), and the other end is in communication with the heating pipe rack (4).

2. The low pressure casting heating device according to claim 1, wherein On the heating pipe rack (4), any of the first heating holes on the top surface is coaxially opposite to one of the first heating holes on the bottom surface.

3. The low pressure casting heating device of claim 1, wherein, The diameter of the first heating hole is more than 2 mm.

4. The low pressure casting heating device of claim 1, wherein, The bottom surface of the heating pipe rack (4) downwardly extends a sprue heating pipe (7) in communication with the heating pipe rack (4). The portion of the sprue heating pipe (7) inserted into the sprue is provided with a plurality of second heating holes at intervals in the circumferential direction. Each of the second heating holes is in communication with the internal space of the sprue heating pipe (7).

5. The low pressure casting heating device of claim 1, wherein, The oxygen feeding pipe (3) is provided with a flow control valve (8) at the position of the oxygen feeding port (301).

6. The low pressure casting heating device of claim 1, wherein, One of the oxygen feeding pipes (3) and two of the gas feeding pipes (2) are connected to the same heating pipe (1). The oxygen feeding pipe (3) is located on the symmetry axis of the heating pipe rack (4), and the two gas feeding pipes (2) are symmetrically arranged on the two sides of the oxygen feeding pipe (3).

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