Crucible cover for igniting steel rail thermit welding flux

Abstract

The utility model discloses a crucible cover for igniting steel rail thermit welding flux, which comprises a crucible cover body, a sandy isolation ring and an ignition small block capable of being ignited, the shape of the lower edge of the crucible cover body is used for being matched with the shape of a crucible, and the crucible cover body is used for tightly covering the upper part of the crucible. A first mounting hole is formed in the crucible cover body; a first mounting hole is formed in the crucible, the sandy isolation ring is mounted in the first mounting hole, a second mounting hole is formed in the sandy isolation ring, the small ignition block is mounted in the second mounting hole, and the second mounting hole is communicated with the hollow cavity of the crucible. According to the crucible cover for igniting the steel rail thermit welding flux, the operation process of igniting the thermit welding flux is simplified, and ignition of the steel rail thermit welding flux is safely and stably achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail thermite welding, and more specifically to a crucible cover for igniting rail thermite flux. Background Art

[0002] Rail aluminothermic welding is to put the aluminothermic flux made of aluminum powder, iron oxide and other alloy additives in a special reaction crucible, and ignite it with a high-temperature match to trigger the aluminothermic reaction. During the reaction, a large amount of hot molten alloy additives are released, and they form a liquid with the iron generated by the reaction. Due to its high density, it sinks to the bottom of the crucible, and the slag generated by the reaction is lighter and floats on the top. In a very short time, the high-temperature aluminothermic liquid melts the self-melting plug at the bottom of the crucible, and is cast into the sand mold with the same size as the rail and the closed cavity formed by the locally preheated rail to be welded. At the same time, the aluminothermic liquid itself acts as a filler metal, crystallizes together with the molten rail, and cools to weld the two sections of the rail into a whole.

[0003] Aluminothermic welding is a commonly used welding method for on-site welding of rails. Aluminothermic welding requires the use of aluminothermic flux, and the high temperature generated by igniting the flux is used to melt the rails to achieve welding. However, the existing aluminothermic welding method requires manual ignition of the flux by igniting a high-temperature match, which is cumbersome and poses safety hazards.

[0004] Therefore, it is necessary to solve the above technical problems. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a crucible cover for igniting thermite flux of a rail, so as to simplify the operation process of igniting thermite flux and realize the ignition of thermite flux of the rail safely and stably.

[0006] Based on the above purpose, the utility model provides a crucible cover for igniting aluminum thermite flux of rails, comprising a crucible cover body, a sandy isolation ring and an ignitable ignition piece, wherein: the shape of the lower edge of the crucible cover body is used to adapt to the shape of the crucible, and is used to tightly cover the top of the crucible, and the crucible cover body is provided with a first mounting hole; the sandy isolation ring is installed in the first mounting hole, and the sandy isolation ring is provided with a second mounting hole, the ignition piece is installed in the second mounting hole, and the second mounting hole is communicated with the hollow cavity of the crucible.

[0007] Optionally, the sand isolation ring is made of raw materials including quartz sand and 6wt% to 10wt% of sodium water glass.

[0008] Optionally, the sand isolation ring is formed by mixing and grinding raw materials including quartz sand and 6wt% to 10wt% of sodium water glass in a grinding wheel type sand mixer.

[0009] Optionally, the component of the ignition block is a thermite flux, and the thermite flux is composed of 65-71wt% of iron oxide, 17-19wt% of aluminum powder and the remainder of alloy additives.

[0010] Optionally, the alloy additive is selected from ferrosilicon, ferromanganese, ferrochrome, ferrovanadium, ferromolybdenum, and rare earth alloys.

[0011] Optionally, the ignition block is directly formed and dried in the sand isolation ring, and the two are bonded together.

[0012] Optionally, a handle is also provided on the crucible cover body.

[0013] Optionally, the sand isolation ring is in the shape of a truncated cone that is wide at the top and narrow at the bottom.

[0014] Optionally, the second mounting hole is in the shape of a truncated cone that is wider at the top and narrower at the bottom, and the ignition block is in the shape of a truncated cone that is wider at the top and narrower at the bottom and is mounted in close contact with the inner wall of the second mounting hole.

[0015] Optionally, the upper end of the sand isolation ring extends out of the crucible cover body.

[0016] The utility model provides a crucible cover for igniting thermite flux for rails, comprising a crucible cover body, a sandy isolation ring and an ignitable ignition block, wherein the ignition block is installed in the sandy isolation ring, and the sandy isolation ring is installed in the crucible cover body. When in use, the ignition block is ignited, and high-temperature liquid generated by the ignition block is dripped onto thermite flux in the crucible, thereby igniting the thermite flux for rails in the crucible, simplifying the operation process of igniting thermite flux, and realizing the ignition of thermite flux for rails safely and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein:

[0018] Figure 1 This is a schematic structural diagram of a crucible cover body in a crucible cover for igniting rail thermite flux according to an embodiment of the utility model;

[0019] Figure 2 This is a schematic structural diagram of a sand isolation ring in a crucible cover for igniting rail thermite flux according to an embodiment of the utility model;

[0020] Figure 3 The utility model is a schematic structural diagram of an ignition block in a crucible cover for igniting thermite flux for rails according to an embodiment of the utility model.

[0021] Description of reference numerals:

[0022] 1: Crucible cover body; 2: Sand isolation ring; 3: Ignition block; 4: First mounting hole; 5: Second mounting hole; 6: Handle. DETAILED DESCRIPTION

[0023] The present invention is described in detail below in conjunction with the embodiments. The same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0024] like Figures 1 to 3 As shown, the crucible cover for igniting rail thermite flux provided by the utility model comprises a crucible cover body 1, a sandy isolation ring 2 and an ignitable ignition block 3, wherein: the shape of the lower edge of the crucible cover body 1 is used to adapt to the shape of the crucible and to tightly cover the top of the crucible, and the crucible cover body 1 is provided with a first mounting hole 4; the sandy isolation ring 2 is installed in the first mounting hole 4, the sandy isolation ring 2 is provided with a second mounting hole 5, the ignition block 3 is installed in the second mounting hole 5, and the second mounting hole 5 is communicated with the hollow cavity of the crucible.

[0025] Specifically, the lower edge of the crucible cover body 1 may be in the shape of a barrel to fit the crucible in the prior art; and the first mounting hole 4 may be a through hole.

[0026] The utility model provides a crucible cover for igniting thermite flux for rails, comprising a crucible cover body 1, a sandy isolation ring 2 and an ignitable ignition block 3, wherein the ignition block 3 is installed in the sandy isolation ring 2, and the sandy isolation ring 2 is installed in the crucible cover body 1. When in use, the ignition block 3 is ignited, and the high-temperature liquid generated by the ignition block 3 is dripped onto the thermite flux in the crucible, thereby igniting the thermite flux for rails in the crucible, simplifying the operation process of igniting the thermite flux, and realizing the ignition of the thermite flux for rails safely and stably.

[0027] In one embodiment of the utility model, the sand isolation ring 2 is made of raw materials including quartz sand and 6wt% to 10wt% of sodium water glass. It is clear to those skilled in the art that additives such as iron oxide or lithium carbonate may also be added as appropriate. The composition of sodium water glass is prior art and may be the composition disclosed in the article "Experimental Study and Failure Analysis of Sand Mold Hardening Process for Aluminum Thermit Welding of Rails", "China Foundry Equipment and Technology", Vol. 56, No. 6, 2021. The quartz sand may be high-purity quartz sand with a SiO2 content exceeding 98%.

[0028] In one embodiment of the utility model, the sandy isolation ring 2 is made by mixing and grinding raw materials including quartz sand and 6wt% to 10wt% of sodium water glass in a grinding wheel type sand mixer, which improves the convenience of producing the sandy isolation ring 2. The grinding wheel type sand mixer can be a SHN type grinding wheel type sand mixer.

[0029] In one embodiment of the utility model, the ignition block 3 is composed of aluminothermic flux, which is composed of 65-71wt% of iron oxide, 17-19wt% of aluminum powder and the remainder of alloy additives. The composition ratio of the aluminothermic flux is the prior art, and can be the composition disclosed in the patent with publication number CN 102029486A, entitled: Aluminothermic flux for high hardness rail and welding method thereof.

[0030] In one embodiment of the utility model, the alloy additive is selected from ferrosilicon, ferromanganese, ferrochrome, ferrovanadium, ferromolybdenum, and rare earth alloy. The composition of the alloy additive is prior art and is also disclosed in the patent with publication number CN 102029486A, entitled: High-hardness rail aluminothermic flux and welding method thereof.

[0031] In one embodiment of the utility model, the ignition block 3 is directly formed and dried in the sandy isolation ring 2, and the two are bonded together. After the ignition block 3 is formed in the sandy isolation ring 2, it is dried again, which has a high temperature resistance effect, prevents the ignition block 3 from adhering to the first mounting hole 4 during high temperature reaction, and improves the convenience of using the crucible cover for igniting the rail thermite flux.

[0032] like Figure 1 As shown, the crucible cover body 1 is also provided with a handle 6, which improves the convenience of installing and picking up the crucible cover body 1.

[0033] In one embodiment of the utility model, the sand isolation ring 2 is in the shape of a truncated cone which is wide at the top and narrow at the bottom, so that the sand isolation ring 2 can be stably installed in the first mounting hole 4 without falling out of the first mounting hole 4, thereby improving the structural stability of the crucible cover used to ignite the aluminum thermite flux of the rail.

[0034] In one embodiment of the utility model, the second mounting hole 5 is in the shape of a truncated cone that is wide at the top and narrow at the bottom, and the ignition block 3 is in the shape of a truncated cone that is wide at the top and narrow at the bottom and is installed in close contact with the inner wall of the second mounting hole 5. The shape of the ignition block 3 is compatible with the second mounting hole 5, thereby improving the structural stability of the crucible cover used to ignite the aluminum thermite flux of the rail.

[0035] In one embodiment of the utility model, the upper end of the sandy isolation ring 2 extends out of the crucible cover body 1. The upper end of the sandy isolation ring 2 extending out of the crucible cover body 1 reduces the left and right shaking degree of the sandy isolation ring 2, thereby improving the structural stability of the crucible cover used to ignite the aluminum thermite flux of the rail.

[0036] The utility model provides a crucible cover for igniting thermite flux for rails, comprising a crucible cover body 1, a sandy isolation ring 2 and an ignitable ignition block 3, wherein the ignition block 3 is installed in the sandy isolation ring 2, and the sandy isolation ring 2 is installed in the crucible cover body 1. When in use, the ignition block 3 is ignited, and the high-temperature liquid generated by the ignition block 3 is dripped onto the thermite flux in the crucible, thereby igniting the thermite flux for rails in the crucible, simplifying the operation process of igniting the thermite flux, and realizing the ignition of the thermite flux for rails safely and stably.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A crucible cover for igniting rail thermite flux, characterized in that: It includes a crucible cover body, a sand isolation ring and an ignition block that can be ignited, wherein: The shape of the lower edge of the crucible cover body is used to match the shape of the crucible and to tightly cover the top of the crucible. The crucible cover body is provided with a first mounting hole; The sandy isolation ring is installed in the first installation hole, a second installation hole is arranged on the sandy isolation ring, the ignition block is installed in the second installation hole, and the second installation hole is communicated with the hollow cavity of the crucible.

2. The crucible cover for igniting rail thermite flux according to claim 1, characterized in that: The ignition block is directly formed and dried in the sand isolation ring, and the two are bonded together.

3. The crucible cover for igniting rail thermite flux according to claim 1, characterized in that: The crucible cover body is also provided with a handle.

4. The crucible cover for igniting rail thermite flux according to claim 1, characterized in that: The sand isolation ring is in the shape of a truncated cone which is wide at the top and narrow at the bottom.

5. The crucible cover for igniting rail thermite flux according to claim 1, characterized in that: The second mounting hole is in the shape of a truncated cone that is wide at the top and narrow at the bottom, and the ignition block is in the shape of a truncated cone that is wide at the top and narrow at the bottom and is mounted in close contact with the inner wall of the second mounting hole.

6. The crucible cover for igniting thermite flux for rails according to claim 1, characterized in that: The upper end of the sand isolation ring extends out of the crucible cover body.

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