False electrode welding tool for seamless steel tube electroslag remelting
By designing a fake electrode welding tool for seamless steel pipes, the first and second pipe bodies are connected by auxiliary fixing plates and pore structures, the insufficient filling ratio of self-consumable electrodes and crystallizers in the remelting of seamless steel pipes is solved and Safety issues enable high-quality steel ingot remelting and safe electroslag remelting process.
Patent Information
- Application Number
- CN202323667200.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2033-12-29
AI Technical Summary
During the electroslag remelting process of seamless steel pipes, the filling ratio of the consumable electrode to the crystallizer of a single seamless steel pipe is too small, which affects the quality of the steel ingot and cannot guarantee the safety of the electroslag remelting process, especially due to the internal gas Risk of explosion caused by poor discharge.
A fake electrode welding tool is designed, including the first tube body and the second tube body. It is connected by welding by auxiliary fixing plates, and air holes are arranged to facilitate gas discharge, ensuring the smooth progress and safety of electroslag remelting.
Through this tooling, the smooth progress of electroslag remelting is achieved, the quality of the remelted ingot is improved, the filling ratio between the consumable electrode and the crystallizer is within a reasonable range, and the explosion caused by the increase in internal air pressure is avoided Risk ensures the safety of the electroslag remelting process.
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Figure CN222119342U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of iron and steel metallurgy, and for example, to a false electrode welding tool for electroslag remelting of seamless steel pipes. Background Art
[0002] In recent years, there has been a large demand for seamless steel pipes for thermal power generation. The production process of seamless steel pipes is smelting and extrusion molding without electroslag remelting. Some seamless steel pipes produced by this process will have defects such as cracks, component segregation, and excessive inclusions, resulting in the scrapping of seamless steel pipes.
[0003] In order to save unqualified seamless steel pipes caused by cracks, excessive inclusions and segregation, the current method is to remelt the seamless steel pipes and then re-form them to save the seamless steel pipes that are scrapped due to various defects. However, since the seamless steel pipes are hollow inside, the electroslag remelting of a single seamless steel pipe results in a too small filling ratio of the consumable electrode to the crystallizer, which affects the quality of the steel ingots after remelting, and the safety of the electroslag remelting process cannot be guaranteed.
[0004] Therefore, how to ensure the smooth progress of electroslag remelting, ensure the quality of the remelted steel ingot, and ensure the safety of the electroslag remelting process has become a technical problem that needs to be solved urgently by those skilled in the art.
[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content
[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.
[0007] The disclosed embodiment provides a false electrode welding tool for electroslag remelting of seamless steel pipes, which can ensure the smooth progress of electroslag remelting and the quality of the steel ingot after remelting. During the electroslag remelting process, the gases generated inside the first tube body and the second tube body can be discharged smoothly, avoiding the risk of explosion due to increased internal gas pressure, thereby ensuring the safety of the electroslag remelting process.
[0008] In some embodiments, a dummy electrode welding tool for electroslag remelting of seamless steel pipes includes: a dummy electrode body, a first tube body, and a second tube body. The first tube body is welded to one end of the dummy electrode body through a first auxiliary fixing plate, and a first exhaust hole is provided on the first tube body; the second tube body is sleeved on a portion of the first tube body, and the first exhaust hole provided on the first tube body is exposed outside the second tube body, and a second exhaust hole is provided on the second tube body, wherein the diameter of the second tube body is greater than the diameter of the first tube body, and the corresponding ends of the first tube body and the second tube body are welded to each other through a second auxiliary fixing plate.
[0009] Optionally, the first auxiliary fixing plate is sleeved on the first tube body, and the first auxiliary fixing plate is welded at a position where it contacts the side wall of the first tube body.
[0010] Optionally, the weld bead between the first auxiliary fixing plate and the first tube body is ∠45°×25mm.
[0011] Optionally, the second auxiliary fixing plate is a circular ring structure, the second auxiliary fixing plate is sleeved on the first tube body, and a side surface of the second auxiliary fixing plate is attached to one end of the second tube body.
[0012] Optionally, the outer circle diameter of the second auxiliary fixing plate is larger than the diameter of the first tube body, and smaller than or equal to the diameter of the second tube body.
[0013] Optionally, the second auxiliary fixing plate and the first tube body are connected by welding, as well as the second auxiliary fixing plate and the second tube body are connected by welding.
[0014] Optionally, there is a first set distance between the first exhaust hole and the first auxiliary fixing plate, and the first set distance is greater than or equal to 120 mm and less than or equal to 150 mm.
[0015] Optionally, the diameter of the first exhaust hole is the same as the diameter of the second exhaust hole.
[0016] Optionally, the second auxiliary fixing plate is located at one side of the first exhaust hole and is arranged closely adjacent to the second auxiliary fixing plate.
[0017] Optionally, a second set distance is provided between the second exhaust hole and an end of the second tube body close to the dummy electrode body.
[0018] The dummy electrode welding tool for electroslag remelting of seamless steel pipes provided in the embodiments of the present disclosure can achieve the following technical effects:
[0019] The first tube body is connected to the dummy electrode body by a first auxiliary fixing plate, and the second tube body is fixed to the first tube body by a second auxiliary fixing plate, so that two seamless steel tubes with different diameters can be connected to the dummy electrode end, which can ensure the smooth progress of electroslag remelting and make the ratio of seamless steel tubes and crystallizers in batch remelting within a reasonable range, thereby improving the filling ratio of consumable electrodes to crystallizers. The surface quality of the electroslag ingot after remelting is good, and the chemical composition burnout rate is within a reasonable range, thereby ensuring the quality of the remelted ingot. A first exhaust hole is opened on the first tube body, and a second exhaust hole is opened on the second tube body, so that during the electroslag remelting process, the gases generated inside the first tube body and the second tube body can be discharged smoothly, thereby avoiding the risk of explosion caused by increased internal air pressure, thereby ensuring the safety of the electroslag remelting process.
[0020] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:
[0022] Figure 1 It is a structural schematic diagram of a false electrode welding tool for electroslag remelting of seamless steel pipes provided in an embodiment of the present disclosure;
[0023] Figure 2 is a schematic structural diagram of a weld provided in an embodiment of the present disclosure;
[0024] Figure 3 is a schematic diagram of the structure of the through hole provided in an embodiment of the present disclosure;
[0025] Figure 4 It is a schematic diagram of the structure of the connecting hole provided in an embodiment of the present disclosure.
[0026] Reference numerals:
[0027] 100, dummy electrode body; 200, first tube body; 201, first exhaust hole; 300, first auxiliary fixing plate; 400, second tube body; 401, second exhaust hole; 500, second auxiliary fixing plate; 501, through hole; 502, connecting hole; 600, weld bead. DETAILED DESCRIPTION
[0028] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.
[0029] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.
[0030] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.
[0031] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.
[0032] Unless otherwise stated, the term "plurality" means two or more.
[0033] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.
[0034] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.
[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.
[0036] Combination Figure 1-2 As shown, the embodiment of the present disclosure provides a dummy electrode welding tool for electroslag remelting of seamless steel pipes, comprising: a dummy electrode body 100, a first tube body 200 and a second tube body 400. The first tube body 200 is welded to one end of the dummy electrode body 100 through a first auxiliary fixing plate 300, and a first exhaust hole 201 is provided on the first tube body 200; the second tube body 400 is sleeved on a portion of the first tube body 200, and the first exhaust hole 201 provided on the first tube body 200 is exposed outside the second tube body 400, and a second exhaust hole 401 is provided on the second tube body 400, wherein the diameter of the second tube body 400 is greater than the diameter of the first tube body 200, and the ends corresponding to the first tube body 200 and the second tube body 400 are welded to each other through a second auxiliary fixing plate 500.
[0037] By using the dummy electrode welding tool for electroslag remelting of seamless steel pipes provided in the embodiment of the present disclosure, the first pipe body 200 is connected to the dummy electrode body 100 by the first auxiliary fixing plate 300, and the second pipe body 400 is fixed on the first pipe body 200 by the second auxiliary fixing plate 500, so that two seamless steel pipes of different diameters can be connected to the dummy electrode end, which can ensure the smooth progress of electroslag remelting, and make the ratio of seamless steel pipes to crystallizers in the batch remelting within a reasonable range, improve the filling ratio of consumable electrodes to crystallizers, the surface quality of the electroslag ingot after remelting is good, and the chemical composition burnout rate is within a reasonable range, thereby ensuring the quality of the ingot after remelting. Among them, a first exhaust hole 201 is opened on the first pipe body 200, and a second exhaust hole 401 is opened on the second pipe body 400, so that during the electroslag remelting process, the gases generated inside the first pipe body 200 and the second pipe body 400 can be discharged smoothly, avoiding the risk of explosion caused by increased internal air pressure, thereby ensuring the safety of the electroslag remelting process.
[0038] Optionally, the first tube body 200 and the second tube body 400 are both hollow tube structures. In this way, the second tube body 400 can be smoothly sleeved and welded on the first tube body 200, and then the seamless steel tube batch welding technology can be used to connect two seamless steel tubes with different diameters to the dummy electrode end.
[0039] Optionally, there is a set gap between the inner side wall of the second tube body 400 and the inner side wall of the first tube body 200, and the set gap is the same as the thickness of the side wall of the first tube body 200 or the second tube body 400. In this way, the relative position between the first tube body 200 and the second tube body 400 after assembly is more reasonable, and when welding, the gas generated in the second tube body 400 can be discharged smoothly, which can not only make the welding go smoothly, but also ensure the safety of the electroslag remelting process.
[0040] Optionally, there is a vacant position of a set length between the second tube body 400 and the dummy electrode body 100, wherein the first auxiliary fixing plate 300, the first exhaust hole 201, and the second auxiliary fixing plate 500 are all located in the vacant position. In this way, the first auxiliary fixing plate 300, the first exhaust hole 201, and the second auxiliary fixing plate 500 are all in appropriate positions, which facilitates the rapid connection of the first tube body 200 with the dummy electrode body 100, and the rapid connection of the first tube body 200 with the second tube body 400.
[0041] Optionally, the first auxiliary fixing plate 300 is sleeved on the first tube body 200, and the first auxiliary fixing plate 300 is welded at the position where it contacts the side wall of the first tube body 200. In this way, the first auxiliary fixing plate 300 can be more firmly connected to the first tube body 200, so that the connection between the first tube body 200 and the dummy electrode body 100 is more stable, and the connection between the first tube body 200 and the dummy electrode body 100 is more coordinated and neat, thereby ensuring the quality of electroslag remelting.
[0042] Optionally, the weld bead 600 of the first auxiliary fixing plate 300 and the first tube body 200 connected by welding is ∠45°×25mm. In this way, since the difference in each weld bead 600 during metal welding will cause different residual stresses, the weld bead 600 of the first auxiliary fixing plate 300 and the first tube body 200 connected by welding is designed to be ∠45°×25mm, so that the first auxiliary fixing plate 300 and the first tube body 200 have a smaller residual stress after being welded, and the quality of electroslag remelting is further improved.
[0043] Optionally, the two opposite sides of the first auxiliary fixing plate 300 are welded to the first tube body 200. In this way, the connection between the first auxiliary fixing plate 300 and the first tube body 200 can be more firmly established, and the first auxiliary fixing plate 300 can be prevented from tilting or breaking under the influence of external force, thereby ensuring the connection strength and stability.
[0044] Optionally, the second auxiliary fixing plate 500 is a circular ring structure, and the second auxiliary fixing plate 500 is sleeved on the first tube body 200, and the side surface of the second auxiliary fixing plate 500 is attached to one end of the second tube body 400. In this way, the first tube body 200 and the second tube body 400 can be better connected by using the second auxiliary fixing plate 500, the tightness of the connection is ensured, the correlation between the first tube body 200 and the second tube body 400 is enhanced, and the second tube body 400 can be more stably assembled on the first tube body 200, which can effectively avoid the change of the relative position between the first tube body 200 and the second tube body 400, and improve the stability of the connection.
[0045] Optionally, the outer diameter of the second auxiliary fixing plate 500 is larger than the diameter of the first tube 200, and smaller than or equal to the diameter of the second tube 400. In this way, the outer diameter of the second auxiliary fixing plate 500 is within a reasonable range, and the first tube 200 and the second tube 400 can be tightly connected by the second auxiliary fixing plate 500, while reducing the space occupied by the second auxiliary fixing plate 500 and the impact on the overall structure, thereby ensuring the rationality and coordination of the overall structure and facilitating subsequent use.
[0046] Optionally, the second auxiliary fixing plate 500 and the first tube body 200 are both welded and connected, and the second auxiliary fixing plate 500 and the second tube body 400 are both welded and connected. In this way, by welding and connecting the position where the second auxiliary fixing plate 500 contacts the first tube body 200 and the position where the second auxiliary fixing plate 500 contacts the second tube body 400, the connection between the first tube body 200 and the second tube body 400 through the second auxiliary fixing plate 500 can be made more firmly, avoiding the relative displacement of the first tube body 200 and the second tube body 400 after they are connected, and further enhancing the stability of the connection.
[0047] Optionally, the welding position of the second auxiliary fixing plate 500 and the first tube body 200 is located on the side of the second auxiliary fixing plate 500 close to the dummy electrode body 100. In this way, since the side of the second auxiliary fixing plate 500 facing the second tube body 400 is in a shielded state, the second auxiliary fixing plate 500 is welded on the side close to the dummy electrode body 100, which effectively improves the convenience of the welding process and helps to quickly complete the welding.
[0048] Optionally, there is a first set spacing between the first exhaust hole 201 and the first auxiliary fixing plate 300, and the first set spacing is greater than or equal to 120 mm and less than or equal to 150 mm. In this way, the distance between the first exhaust hole 201 and the first auxiliary fixing plate 300 is within a reasonable range, and the opening position of the first exhaust hole 201 on the first tube body 200 is also within a reasonable range, so that when the first tube body 200 is welded to the dummy electrode body 100 by using the first auxiliary fixing plate 300, the gas generated during the welding process can be quickly discharged through the first exhaust hole 201, avoiding the risk of explosion caused by gas accumulation due to the inability to quickly discharge the internal gas, which increases the gas pressure, and ensures the safety of the electroslag remelting process.
[0049] Optionally, the diameter of the first exhaust hole 201 is the same as the diameter of the second exhaust hole 401. In this way, while ensuring smooth exhaust, after the first exhaust hole 201 is opened on the first tube body 200, the second exhaust hole 401 can be quickly opened on the second tube body 400 according to the diameter of the first exhaust hole 201, thereby eliminating the need to repeatedly determine the opening diameter, reducing the corresponding processes, and saving the time of electroslag remelting.
[0050] Optionally, the diameter of the first exhaust hole 201 and the diameter of the second exhaust hole 401 are both 25 mm. In this way, the diameter of the first exhaust hole 201 and the diameter of the second exhaust hole 401 can be more reasonable, which can avoid the situation where the diameter is too large and affects the subsequent use, and ensure that the first exhaust hole 201 and the second exhaust hole 401 can smoothly exhaust the gas.
[0051] Optionally, the second auxiliary fixing plate 500 is located at one side of the first exhaust hole 201 and is arranged close to the second auxiliary fixing plate 500. In this way, the second auxiliary fixing plate 500 is arranged more compactly, and the space occupation is reduced while not affecting the exhaust of the first exhaust hole 201, and the assembly of the first tube body 200 and the second tube body 400 is more coordinated.
[0052] In other embodiments, Figure 3 As shown, optionally, the second auxiliary fixing plate 500 covers the first exhaust hole 201, and the second auxiliary fixing plate 500 is provided with a through hole 501 connected to the first exhaust hole 201. In this way, by arranging the second auxiliary fixing plate 500 at the position of the first exhaust hole 201, the space occupation can be effectively reduced, and the relative position between the first tube body 200 and the second tube body 400 is more reasonable, and the through hole 501 connected to the first exhaust hole 201 is provided on the second auxiliary fixing plate 500, which will not affect the exhaust of the first exhaust hole 201, thereby ensuring the smooth exhaust process.
[0053] In other embodiments, Figure 4As shown, optionally, the second auxiliary fixing plate 500 covers the first exhaust hole 201, and a connecting hole 502 is provided on the second auxiliary fixing plate 500, and the first exhaust hole 201 is sequentially connected with the inner cavity of the second tube body 400 and the second exhaust hole 401 through the connecting hole 502. In this way, by arranging the second auxiliary fixing plate 500 at the position of the first exhaust hole 201, the space occupation can be effectively reduced, and the relative position between the first tube body 200 and the second tube body 400 can be more reasonable, and the second auxiliary fixing plate 500 is provided with a connecting hole 502 sequentially connected with the inner cavity of the second tube body 400 and the second exhaust hole 401, so that the gas in the first tube body 200 can be discharged from the first exhaust port through the connecting hole 502 and finally from the second exhaust hole 401.
[0054] Optionally, there is a second set distance between the second exhaust hole 401 and the end of the second tube 400 close to the dummy electrode body 100. In this way, the second exhaust hole 401 is opened at a more reasonable position on the second tube 400, so that when the second tube 400 is welded to the first tube 200 by the second auxiliary fixing plate 500, the gas generated during the welding process can be quickly discharged through the second exhaust hole 401, avoiding the risk of explosion caused by gas accumulation due to the inability to quickly discharge the internal gas, which increases the gas pressure, and ensures the safety of the electroslag remelting process.
[0055] Optionally, the second set spacing is the same as the first set spacing. In this way, after the first exhaust hole 201 is opened on the first tube body 200, the second exhaust hole 401 can be quickly opened on the second tube body 400 according to the first set spacing, so that there is no need to repeatedly determine the position of the hole, reduce the corresponding process, and save the time of electroslag remelting.
[0056] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims
1. A false electrode welding tool for electroslag remelting of seamless steel pipes, characterized in that: include: A pseudo-electrode body (100); The first tube body (200) is welded to one end of the dummy electrode body (100) via a first auxiliary fixing plate (300), and a first exhaust hole (201) is provided on the first tube body (200); The second tube body (400) is sleeved on a portion of the first tube body (200), and the first exhaust hole (201) provided on the first tube body (200) is exposed outside the second tube body (400). The second tube body (400) is provided with a second exhaust hole (401), wherein the diameter of the second tube body (400) is greater than the diameter of the first tube body (200), and the corresponding ends of the first tube body (200) and the second tube body (400) are connected by welding via a second auxiliary fixing plate (500).
2. The false electrode welding tool for electroslag remelting of seamless steel pipe according to claim 1, characterized in that: The first auxiliary fixing plate (300) is sleeved on the first tube body (200), and the first auxiliary fixing plate (300) is welded at a position where it contacts the side wall of the first tube body (200).
3. The false electrode welding tool for electroslag remelting of seamless steel pipe according to claim 2, characterized in that: The weld bead (600) connecting the first auxiliary fixing plate (300) and the first tube body (200) by welding is ∠45°×25mm.
4. The false electrode welding tool for electroslag remelting of seamless steel pipe according to claim 1, characterized in that: The second auxiliary fixing plate (500) is a circular ring structure. The second auxiliary fixing plate (500) is sleeved on the first tube body (200), and the side surface of the second auxiliary fixing plate (500) is attached to one end of the second tube body (400).
5. The false electrode welding tool for electroslag remelting of seamless steel pipe according to claim 4, characterized in that: The outer diameter of the second auxiliary fixing plate (500) is greater than the diameter of the first tube body (200) and less than or equal to the diameter of the second tube body (400).
6. The false electrode welding tool for electroslag remelting of seamless steel pipe according to claim 4, characterized in that: The second auxiliary fixing plate (500) and the first tube body (200) as well as the second auxiliary fixing plate (500) and the second tube body (400) are connected by welding.
7. The false electrode welding tool for electroslag remelting of seamless steel pipe according to any one of claims 1 to 6, characterized in that: There is a first set distance between the first exhaust hole (201) and the first auxiliary fixing plate (300), and the first set distance is greater than or equal to 120 mm and less than or equal to 150 mm.
8. The false electrode welding tool for electroslag remelting of seamless steel pipe according to any one of claims 1 to 6, characterized in that: The diameter of the first exhaust hole (201) is the same as the diameter of the second exhaust hole (401).
9. The false electrode welding tool for electroslag remelting of seamless steel pipe according to any one of claims 1 to 6, characterized in that: The second auxiliary fixing plate (500) is located on one side of the first exhaust hole (201) and is arranged closely adjacent to the second auxiliary fixing plate (500).
10. The false electrode welding tool for electroslag remelting of seamless steel pipe according to any one of claims 1 to 6, characterized in that: A second set distance is provided between the second exhaust hole (401) and an end of the second tube (400) close to the dummy electrode body (100).