Low-pressure casting riser tube heat preservation device

Abstract

The utility model discloses a low-pressure casting riser tube heat preservation device which comprises a liquid storage tank, a heat preservation sleeve is fixedly installed on the upper portion of the liquid storage tank, a riser tube is arranged in the heat preservation sleeve, the riser tube is fixedly installed in the liquid storage tank, and an annular cover plate is sleeved on the riser tube. The annular cover plate can cover an opening in the top of the heat preservation sleeve, when pressurization is conducted in the box, molten metal rises in the heat preservation sleeve and the liquid rising pipe at the same time, the molten metal in the heat preservation sleeve can have a certain heat preservation effect on the liquid rising pipe, and when the liquid level of the heat preservation sleeve rises to a certain height, the annular cover plate is rotated to close the top of the heat preservation sleeve. And only the molten metal in the riser tube can be further lifted and injected into the mold.

Description

Technical Field

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

[0002] In the low-pressure casting process, molten metal rises from the raw material tank along the riser pipe into the mold. Part of the pipe is exposed, and some heat is dissipated as the molten metal passes through, resulting in insufficient temperature and poor fluidity of the molten metal entering the mold, leading to defects in the finished product. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a low-pressure casting riser pipe insulation device, which solves the current pain points in this field.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A low-pressure casting riser pipe insulation device includes a liquid storage tank, an insulation sleeve fixedly installed on the upper part of the liquid storage tank, a riser pipe disposed in the insulation sleeve, the riser pipe being fixedly installed in the liquid storage tank, and an annular cover plate fitted on the riser pipe, the annular cover plate covering the top opening of the insulation sleeve.

[0006] To further explain, the bottom of the riser pipe is fixedly installed to the bottom of the storage tank by a fixing bracket, and the top of the riser pipe extends out of the insulation sleeve and is fixedly installed to the top of the storage tank by a mounting bracket.

[0007] To further explain, a threaded ring is fixedly installed on the outer wall of the riser tube, and the threaded ring is located at the opening of the insulation sleeve. A sealing ring is fixedly installed on the lower side of the annular cover plate, and the sealing ring is threadedly connected to the outer side of the threaded ring.

[0008] To further explain, the liquid storage tank has an air inlet on its side wall.

[0009] To further explain, a motor is fixedly mounted on the mounting bracket, a gear is fixedly mounted on the motor shaft, and a toothed ring is provided on the outer side of the annular cover plate, which can mesh with the gear. The motor can drive the annular cover plate to rotate.

[0010] In summary, the advantages of this utility model compared to the prior art are as follows: when pressurizing inside the box, the molten metal rises simultaneously in the insulation sleeve and the riser pipe. The molten metal in the insulation sleeve can provide a certain degree of insulation for the riser pipe. When the liquid level in the insulation sleeve rises to a certain height, the annular cover is rotated to close the top of the insulation sleeve, so that only the molten metal in the riser pipe can be further lifted and injected into the mold. Attached Figure Description

[0011] The above and other objects, features, and advantages of the present invention will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of the present invention are illustrated in the drawings by way of example and not limitation, in which:

[0012] Figure 1 This is a schematic diagram of a low-pressure casting riser pipe insulation device.

[0013] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0014] Explanation of reference numerals in the attached drawings: 10. Liquid storage tank; 11. Insulation sleeve; 12. Lifting pipe; 13. Mounting bracket; 14. Fixing bracket; 15. Threaded ring; 16. Annular cover plate; 17. Sealing ring; 18. Motor; 19. Gear; 20. Air inlet. Detailed Implementation

[0015] The utility model will be further described in detail below with reference to the accompanying drawings.

[0016] A low-pressure casting riser pipe insulation device includes a liquid storage tank 10. An insulation sleeve 11 is fixedly installed on the upper part of the liquid storage tank 10. A riser pipe 12 is disposed within the insulation sleeve 11. The bottom of the riser pipe 12 is fixedly installed to the bottom of the liquid storage tank 10 via a fixing bracket 14. The liquid storage tank 10 contains molten metal. The lower ends of both the insulation sleeve 11 and the riser pipe 12 are immersed in the molten metal. The top of the riser pipe 12 extends beyond the insulation sleeve 11 and is fixedly installed to the top of the liquid storage tank 10 via a mounting bracket 13. The top of the riser pipe 12 can be inserted into a casting mold. A threaded ring 15 is fixedly installed on the outer wall of the riser pipe 12, located at an opening in the insulation sleeve 11. An annular cover plate 16 is provided, and a sealing ring 17 is fixedly installed on the lower side of the annular cover plate 16. The sealing ring 17 is threadedly connected to the outer side of the threaded ring 15. The annular cover plate 16 can cover the top opening of the insulation sleeve 11. An air inlet 20 is provided on the side wall of the liquid storage tank 10. Gas can be introduced into the liquid storage tank 10 through the air inlet 20, so that the molten metal rises along the insulation sleeve 11 and the riser pipe 12. The molten metal in the insulation sleeve 11 can reduce the rate of temperature drop of the molten metal in the riser pipe 12 within a certain period of time. After the molten metal in the insulation sleeve 11 rises to a certain level, the annular cover plate 16 is rotated to close the bottom of the insulation sleeve 11, so that only the molten metal in the riser pipe 12 rises subsequently.

[0017] A motor 18 is fixedly mounted on the mounting bracket 13, and a gear 19 is fixedly mounted on the shaft of the motor 18. A toothed ring is provided on the outer side of the annular cover plate 16, which can mesh with the gear 19. The motor 18 can drive the annular cover plate 16 to rotate.

[0018] The above description is merely an exemplary embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. The scope of protection of the present utility model is determined by the appended claims.

Claims

1. A heat preservation device for a low-pressure casting riser pipe, characterized in that: Includes a liquid storage tank (10), an insulation sleeve (11) is fixedly installed on the upper part of the liquid storage tank (10), a riser pipe (12) is provided in the insulation sleeve (11), the riser pipe (12) is fixedly installed in the liquid storage tank (10), and an annular cover plate (16) is fitted on the riser pipe (12), the annular cover plate (16) can cover the top opening of the insulation sleeve (11).

2. The heat preservation device for a low-pressure casting riser pipe (12) according to claim 1, characterized in that: The bottom of the riser tube (12) is fixedly installed at the bottom of the liquid storage tank (10) by a fixing bracket (14), and the top of the riser tube (12) extends out of the insulation sleeve (11) and is fixedly installed at the top of the liquid storage tank (10) by a mounting bracket (13).

3. The heat preservation device for a low-pressure casting riser pipe (12) according to claim 1, characterized in that: A threaded ring (15) is fixedly installed on the outer wall of the riser pipe (12). The threaded ring (15) is located at the opening of the insulation sleeve (11). A sealing ring (17) is fixedly installed on the lower side of the annular cover plate (16). The sealing ring (17) is threadedly connected to the outer side of the threaded ring (15).

4. The heat preservation device for a low-pressure casting riser pipe (12) according to claim 1, characterized in that: An air inlet (20) is provided on the side wall of the liquid storage tank (10).

5. The heat preservation device for a low-pressure casting riser pipe (12) according to claim 2, characterized in that: A motor (18) is fixedly mounted on the mounting bracket (13), and a gear (19) is fixedly mounted on the shaft of the motor (18). A toothed ring is provided on the outer side of the annular cover plate (16), which can mesh with the gear (19). The motor (18) can drive the annular cover plate (16) to rotate.

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