Integrated riser tube for low-pressure casting holding furnace

Abstract

The utility model discloses an integrated riser tube for a low-pressure casting holding furnace, which comprises a riser tube main body, an annular metal sleeve body is fixed on the outer side of the upper part of the riser tube main body, and a heat insulation material is filled in an inner cavity of the annular metal sleeve body. The upper portion of the liquid rising pipe can be directly connected with a pouring cup on a mold, an independent suction pipe is not needed, heat loss at the connecting position is reduced, the annular metal sleeve body is installed on the outer side wall of the suction connecting pipe section, the heat insulation material is installed in the suction connecting pipe section, and the heat insulation effect is improved; the use time is long, the use of asbestos materials is saved, and the cost is reduced.

Description

Technical field:

[0001] The utility model relates to the technical field related to low-pressure casting processing equipment, and more specifically to an integrated liquid riser for a low-pressure casting insulation furnace. Background technology:

[0002] Aluminum alloy low-pressure casting is to pour liquid aluminum alloy into a sealed insulation furnace, inject dry compressed air or inert gas to generate pressure on the metal liquid surface, so that the metal liquid can smoothly fill the mold cavity through the riser and gate.

[0003] The existing insulation furnace is generally equipped with a riser pipe, which is relatively short, and a suction pipe needs to be installed between the riser pipe and the mold. The suction pipe is connected to the pouring cup installed on the mold, and then enters the cavity through the pouring sleeve for molding.

[0004] Asbestos pads need to be installed at both ends of the suction pipe installed between the insulation furnace and the mold to ensure the seal between the three. A filter screen is installed inside to filter the aluminum slag. In order to maintain the temperature of the channel, it is necessary to cover the exposed part of the outer wall of the suction pipe and the riser pipe connected to the sound absorption pipe with an asbestos layer for insulation.

[0005] It requires a lot of asbestos material, and the asbestos wrapped in the outer circle is exposed. After a long time of use, it will scatter. In order to improve the thermal insulation, it can only be disassembled and reinstalled. Its disassembly and assembly is troublesome, and the protection effect of a single layer of asbestos is still limited, and the heat dissipation problem is still relatively large. Utility model content:

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an integrated riser pipe for a low-pressure casting insulation furnace, the upper part of which can be directly connected to the pouring cup on the mold without a separate suction pipe, thereby reducing heat loss at the connection, an annular metal sleeve is installed on the outer wall of the suction connecting pipe section, and a heat insulating material is installed inside to improve the heat insulating effect, and the heat insulating material is in the annular metal sleeve and will not scatter, so it can be used for a long time, saving the use of asbestos material and reducing costs.

[0007] The solution of the utility model to solve the technical problem is:

[0008] An integrated riser pipe for a low-pressure casting insulation furnace comprises a riser pipe body, an annular metal sleeve is fixed on the outer side of the upper part of the riser pipe body, and a heat insulation material is filled in the inner cavity of the annular metal sleeve.

[0009] The upper part of the liquid riser main body is a suction connection pipe section, and a thickened layer extending radially outward is formed on the outer wall of the liquid riser main body; the thickened layer further improves the heat preservation effect.

[0010] The annular metal sleeve includes an inner sleeve, which is clamped on the outer wall of the thickened layer, a radial extension portion is formed on the inner wall of the bottom end of the inner sleeve, the top surface of the radial extension portion is pressed against the bottom surface of the thickened layer, the inner wall of the radial extension portion is close to the outer wall of the lift tube body, outer radial extension portions are formed on the outer walls of the top and bottom ends of the inner sleeve, the outer sleeve is outside the inner sleeve, the top end of the outer sleeve is welded and fixed to the bottom surface of the upper outer radial extension portion, the bottom end of the outer sleeve is welded and fixed to the top surface of the lower outer radial extension portion, an annular cavity is formed between the inner sleeve and the outer sleeve, and the annular cavity is filled with thermal insulation material.

[0011] The heat insulating material is asbestos material. The annular metal sleeve protects the internal heat insulating material, which is not easy to scatter, and increases the service life. The annular metal sleeve and the heat insulating material can further improve the heat preservation effect of the outer wall surface of the suction connection pipe section, and also reduce the use amount of the heat insulating material and reduce the use cost.

[0012] A radially extending annular edge is formed on the upper outer wall of the thickened layer, and an annular groove is formed on the top inner wall of the inner sleeve body. The annular edge is in the annular groove, the outer wall of the annular edge is pressed against the inner wall of the annular groove, and the bottom surface of the annular edge is pressed against the bottom surface of the annular groove.

[0013] The outstanding effects of the utility model are:

[0014] 1. The upper part of its rising pipe is a suction connecting pipe section, which can be directly connected to the pouring cup on the mold without a separate suction pipe, reducing the heat loss at the connection. An annular metal sleeve is installed on the outer wall of the suction connecting pipe section, and a heat insulation material is installed inside to improve the heat insulation effect. Moreover, the heat insulation material is in the annular metal sleeve and will not scatter. It has a long service life, saves the use of asbestos materials, and reduces costs.

[0015] 2. A thickened layer is formed on the outer wall of the suction connecting pipe section to further reduce heat loss and improve its strength. Description of the drawings:

[0016] Figure 1 It is a partial structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 A partial enlarged view of . Specific implementation method:

[0018] For example, see Figure 1 to Figure 2As shown, an integrated riser pipe for a low-pressure casting insulation furnace includes a riser pipe body 10, the upper part of which is a suction connecting pipe section, and a thickened layer 11 extending radially outward is formed on its outer wall; the thickened layer 11 further improves its thermal insulation effect.

[0019] An annular metal sleeve 20 is provided on the outside of the thickened layer 11, and the annular metal sleeve 20 includes an inner sleeve 21, and the inner sleeve 21 is clamped on the outer wall of the thickened layer 11. A radial extension portion 22 is formed on the inner wall of the bottom end of the inner sleeve 21, and the top surface of the radial extension portion 22 is pressed against the bottom surface of the thickened layer 11. The inner wall of the radial extension portion 22 is close to the outer wall of the riser tube body 10, and outer radial extension portions 23 are formed on the outer walls of the top and bottom ends of the inner sleeve 21. An outer sleeve 24 is located outside the inner sleeve 21, and the top end of the outer sleeve 24 is welded and fixed to the bottom surface of the upper outer radial extension portion 23, and the bottom end of the outer sleeve 24 is welded and fixed to the top surface of the lower outer radial extension portion 23. An annular cavity is formed between the inner sleeve 21 and the outer sleeve 24, and the annular cavity is filled with thermal insulation material 1.

[0020] The annular metal sleeve 20 is made of iron metal parts, and the annular metal sleeve 20 and the internal heat insulating material 1 can further improve the heat insulating effect of the outer wall surface of the suction connection pipe section.

[0021] Furthermore, the thermal insulation material 1 is asbestos material, and other high temperature resistant thermal insulation materials can also be used.

[0022] Furthermore, a radially extending annular edge 12 is formed on the upper outer wall of the thickened layer 11, and an annular groove is formed on the top inner wall of the inner sleeve body 21. The annular edge 12 is in the annular groove, the outer wall of the annular edge 12 is pressed against the inner wall of the annular groove, and the bottom surface of the annular edge 12 is pressed against the bottom surface of the annular groove.

[0023] An upper raised ring portion 25 is formed on the top surface of the inner side of the inner casing 21; the outer side wall of the top end of the thickened layer 11 is pressed against the inner side wall of the upper raised ring portion 25, and the top surface of the thickened layer 11 is flush with the top surface of the riser tube body 10 and the top surface of the upper raised ring portion 25. A lower extended casing portion 211 extending downward is formed on the inner side wall of the bottom end surface of the inner casing 21, and the inner side wall of the lower extended casing portion 211 is pressed against the outer side wall of the riser tube body 10.

[0024] The upper raised ring portion 25 and the lower extended sleeve portion 211 are used to increase the contact area with the outer side wall of the riser tube body 10 .

[0025] Furthermore, an annular raised ring portion 13 extending upward is formed on the top surface of the riser pipe body 10, and the asbestos gasket 2 is clamped on the outer wall of the annular raised ring portion 13, and the top surface of the asbestos gasket 2 is higher than the top surface of the annular raised ring portion 13. The annular raised ring portion 13 can play an installation and positioning effect on the placed asbestos gasket 2.

[0026] At the same time, an inner annular groove is formed on the inner wall of the top end of the suction connecting pipe section, which can insert the ceramic filter mesh block 100 into the top end of the suction connecting pipe section, with its bottom edge pressed against the bottom surface of the inner annular groove, and the outer wall of the ceramic filter mesh block 100 is tightly attached to the inner wall of the inner annular groove.

[0027] When this embodiment is in use, it can be installed in a heat-insulating furnace, with the bottom surface of the annular metal sleeve 20 pressed against the top surface of the installation position of the heat-insulating furnace to achieve positioning and support the installation of the riser tube body 10, while the bottom end surface of the pouring cup is pressed against the top surface of the asbestos gasket 2 (the asbestos gasket 2 is compressed), the top surface of the annular raised ring 13 and the top surface of the edge of the ceramic filter mesh block 100 for connection.

Claims

1. An integrated riser pipe for a low-pressure casting holding furnace, comprising a riser pipe body (10), characterized in that: An annular metal sleeve (20) is fixed on the outer side of the upper part of the riser pipe body (10), and a heat insulating material (1) is filled in the inner cavity of the annular metal sleeve (20); The upper part of the liquid riser main body (10) is a suction connection pipe section, and a thickened layer (11) extending radially outward is formed on the outer wall of the liquid riser main body (10); The annular metal sleeve (20) comprises an inner sleeve (21), the inner sleeve (21) being clamped on the outer side wall of the thickened layer (11), a radial extension portion (22) being formed on the inner side wall of the bottom end of the inner sleeve (21), the top surface of the radial extension portion (22) being pressed against the bottom surface of the thickened layer (11), the inner side wall of the radial extension portion (22) being in close contact with the outer side wall of the riser tube body (10), outer radial extension portions (23) being formed on the outer side walls of the top and bottom ends of the inner sleeve (21), an outer sleeve (24) being located outside the inner sleeve (21), the top end of the outer sleeve (24) being welded and fixed to the bottom surface of the upper outer radial extension portion (23), the bottom end of the outer sleeve (24) being welded and fixed to the top surface of the lower outer radial extension portion (23), an annular cavity being formed between the inner sleeve (21) and the outer sleeve (24), the annular cavity being filled with a heat insulating material (1).

2. The integrated riser pipe for a low-pressure casting holding furnace according to claim 1, characterized in that: The thermal insulation material (1) is asbestos material.

3. The integrated riser pipe for a low-pressure casting holding furnace according to claim 1, characterized in that: A radially extending annular edge (12) is formed on the upper outer wall of the thickened layer (11), and an annular groove is formed on the top inner wall of the inner sleeve (21). The annular edge (12) is located in the annular groove, the outer wall of the annular edge (12) is pressed against the inner wall of the annular groove, and the bottom surface of the annular edge (12) is pressed against the bottom surface of the annular groove.

4. The integrated riser for a low-pressure casting holding furnace according to claim 1, characterized in that: An upper raised ring portion (25) is formed on the top surface of the inner side of the inner sleeve (21); the top outer wall of the thickened layer (11) is pressed against the inner wall of the upper raised ring portion (25); the top surface of the thickened layer (11) is flush with the top surface of the riser tube body (10) and the top surface of the upper raised ring portion (25).

5. The integrated riser pipe for a low-pressure casting holding furnace according to claim 1, characterized in that: A lower extension sleeve portion (211) extending downward is formed on the inner side wall of the bottom end surface of the inner sleeve (21), and the inner side wall of the lower extension sleeve portion (211) is pressed against the outer side wall of the riser pipe body (10).

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