Rotary flange and furnace breaker big arm

Abstract

The utility model discloses a rotary flange and a large arm of a furnace disassembling machine. The rotary flange comprises a flange body, a plurality of bolt holes are formed in the flange body and used for being connected with a connected object through connecting bolts. The flange is characterized in that at least one locking groove is formed in the connecting end face of the flange body and matched with a locking block fixedly connected to a connecting object; or, at least one locking block is arranged on the connecting end face of the flange body and matched with the locking groove formed in the connecting object. During assembly, the locking block is embedded into the locking groove and is in interference fit with the locking groove, so that relative rotation of the flange body and the connected object is limited. According to the rotary flange provided by the invention, the shear stress borne by the connecting bolts can be reduced, so that the breaking risk of the connecting bolts is reduced; the large arm of the furnace dismantling machine adopting the rotary flange can reduce or avoid cracking of the large arm.

Description

Technical Field

[0001] This application relates to the field of metallurgical engineering machinery technology, and in particular to a rotary flange and a furnace dismantling machine boom. Background Technology

[0002] Currently, the main function of the furnace dismantling machine used in steel plants is to open the tap hole and clean the slag in the furnace body and ladle. The working method of the furnace dismantling machine is to use vibration hammering, drilling with spiked clubs, and slag removal with hooks.

[0003] To meet the load-bearing requirements of the furnace platform, the currently used furnace dismantling machines use thin materials to reduce their weight. However, the impact and shear stresses that the furnace dismantling machines need to withstand are very large. Moreover, during operation, because the hydraulic hammers strike objects at 360° unpredictable angles, there is a lateral reaction force and high-frequency vibration force. These forces are transmitted to the connection point at the root of the boom, which can easily lead to boom cracking and boom connecting bolts breaking. This increases maintenance costs and downtime, affecting the smelting schedule. Safety hazards occur frequently, posing safety risks.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a rotary flange to reduce the risk of connecting bolts breaking off. Additionally, this application also provides a furnace dismantling machine boom that can reduce or avoid the occurrence of connecting bolts breaking off and boom cracking.

[0006] To achieve the above objectives, this application employs the following technical solution:

[0007] In a first aspect, this application provides a rotary flange, including a flange body, wherein the flange body is provided with a plurality of bolt holes for connecting to a connected object by connecting bolts; at least one locking groove is provided on the connecting end face of the flange body, which is adapted to a locking block fixedly connected to the connected object; or, at least one locking block is provided on the connecting end face of the flange body, which is adapted to a locking groove provided on the connected object.

[0008] During assembly, the locking block is embedded in the locking groove and is interference-fitted with the locking groove to restrict relative rotation between the flange body and the connected object.

[0009] In conjunction with the first aspect, furthermore, the plurality of bolt holes are evenly distributed on the same circumference with the center of the flange body as the center, and the central angles of adjacent bolt holes are equal.

[0010] In conjunction with the first aspect, furthermore, both the locking groove and the locking block are provided in multiple quantities, with the number of both being equal and their positions corresponding to each other.

[0011] In conjunction with the first aspect, further, multiple locking grooves are distributed along the same circumference with the center of the flange body as the center; multiple locking grooves and multiple bolt holes are distributed on different circumferences; the locking blocks are provided in one-to-one correspondence with the locking grooves.

[0012] In conjunction with the first aspect, furthermore, four locking blocks are provided, and the locking blocks are rectangular blocks or cylindrical blocks.

[0013] In conjunction with the first aspect, furthermore, when the locking block is disposed on the flange body, it is integrally formed with the flange body; when the locking block is disposed on the connecting object, it is integrally formed with the connecting object.

[0014] Secondly, this application provides a furnace dismantling machine boom, including a base cover and a slewing flange as described in any of the first aspects; the base cover serves as the connection object of the slewing flange and is fixedly connected to the slewing flange by connecting bolts and locking blocks.

[0015] In conjunction with the second aspect, the furnace dismantling machine boom further includes a boom support and a rotary gearbox mounted on the boom support, the rotary gearbox being connected to the rotary flange;

[0016] The total length of the boom support and slewing gearbox is extended to 2880mm.

[0017] In conjunction with the second aspect, the furnace dismantling machine boom further includes a working arm, rollers, and a telescopic arm arranged in sequence. The telescopic arm is connected to a hydraulic hammer via a tool cylinder; the hydraulic hammer is connected to a chisel; and the working arm is connected to the rotary flange via the base cover.

[0018] The total length of the telescopic arm is shortened to 3500mm, and the distance between the end face of the telescopic arm near the roller and the connecting end face of the rotary flange is shortened to 3620mm; the chisel is selected with a length extended by 500mm to ensure that the working radius of the furnace dismantling machine boom remains unchanged.

[0019] In conjunction with the second aspect, the locking block is further formed by heat treatment of Q460 steel, with a surface hardness of HRC52-55. The dimensions of the locking block are 39.90mm×19.96mm×19.9mm, and the tolerance is H7 / g6. The load-bearing capacity of a single locking block is ≥1500kN.

[0020] Compared with the prior art, this application can achieve at least the following beneficial effects:

[0021] The rotary flange provided in this application features a locking block between the flange body and the connected object. The locking block and locking groove are interference-fitted, thereby restricting relative rotation between the flange body and the connected object, reducing the shear stress borne by the connecting bolts, and thus lowering the risk of bolt breakage. The furnace dismantling machine boom provided in this application, using the aforementioned rotary flange, reduces bolt breakage while minimizing or preventing boom cracking. Furthermore, the overall length of the furnace dismantling machine boom provided in this application is reduced by 500mm compared to existing booms, reducing its weight and thus the tension in the connecting bolts. This also reduces the risk of bolt breakage due to longitudinal forces, and the shortened boom's sway can be controlled to a minimal range, improving the precision of the furnace dismantling operation. To ensure the working radius of the furnace dismantling machine boom remains unchanged, this application uses a longer chisel to compensate, meeting the boom's working radius requirements. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a rotary flange provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of a structure for connecting a rotary flange and a base plate according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of a furnace dismantling machine boom provided in an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Rotary flange; 1-1. Flange body; 1-2. Bolt holes; 1-3. Locking groove; 1-4. Locking block;

[0028] 2-1. Base cover; 2-2. Boom support; 2-3. Rotary gearbox; 2-4. Working arm; 2-5. Roller; 2-6. Telescopic arm; 2-7. Tool cylinder; 2-8. Hammer head; 2-9. Boom cylinder; 2-10. Chisel; 3. Connecting bolts. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.

[0030] Example 1:

[0031] like Figure 1 The diagram shown is a structural schematic of a rotary flange 1 provided in an embodiment of the present invention, including a flange body 1-1. The flange body 1-1 has a central axial opening to form a ring structure, and multiple bolt holes 1-2 are circumferentially opened on the flange body 1-1 for connection to a connected object via connecting bolts 3.

[0032] A locking groove 1-3 is provided on the connecting end face of the flange body 1-1. Correspondingly, a locking block 1-4 can be provided on the connecting object of the rotary flange 1, corresponding to the locking groove 1-3. When assembling the rotary flange 1 with the connecting object, the locking block 1-4 is embedded in the locking groove 1-3, and the locking block 1-4 and the locking groove 1-3 are connected by an interference fit. Then, the flange body 1-1 and the connecting object are fixedly connected by connecting bolts 3 with high-strength preload.

[0033] In this embodiment, a locking block 1-4 and a locking groove 1-3 are provided between the flange body 1-1 and the connected object to form an interference fit connection structure, thereby further restricting the relative rotation between the flange body 1-1 and the connected object, reducing the shear stress borne by the connecting bolt 3, and thus reducing the risk of the connecting bolt 3 breaking off.

[0034] See also Figure 1 In this embodiment of the invention, to ensure balanced force distribution on the flange body 1-1, multiple bolt holes 1-2 are evenly distributed on the same circumference with the center of the flange body 1-1 as the center, and the central angles of adjacent bolt holes 1-2 are equal. Similarly, multiple locking grooves 1-3 and locking blocks 1-4 can also be provided. Obviously, to enable them to cooperate with each other, the number of locking grooves 1-3 and locking blocks 1-4 should be equal, and their positions should correspond to each other.

[0035] As one embodiment, four locking grooves 1-3 can be provided, and the four locking grooves 1-3 are distributed along the same circumference with the center of the flange body 1-1 as the center. It should be noted that, in order to ensure the mechanical strength of the flange body 1-1, the locking grooves 1-3 and the bolt holes 1-2 should be distributed on different circumferences. The locking grooves 1-3 are located in the middle of the connecting end face of the flange body 1-1, but should not penetrate the connecting end face radially.

[0036] Alternatively, locking blocks 1-4 can be set as rectangular blocks or cylindrical blocks. Of course, locking blocks 1-4 can also be set as protruding structures of other shapes, such as arc shapes, S-shapes, etc.

[0037] To ensure connection strength, the locking block 1-4 can be integrally formed with the connecting object when it is disposed on the connecting object. However, as a variation, the locking block 1-4 fixedly connected to the connecting object in this application can also be: a connecting groove is opened on the connecting object, the locking block 1-4 is partially embedded in the connecting groove, and then the part of the locking block 1-4 protruding from the connecting groove is embedded in the aforementioned locking groove 1-3.

[0038] Example 2:

[0039] This embodiment provides a rotary flange 1, which differs from Embodiment 1 in that: the locking groove 1-3 is formed on the connected object, and correspondingly, the locking block 1-4 is provided on the flange body 1-1. This design structure can better ensure the mechanical strength of the flange body 1-1. The locking block 1-4 can be integrally formed with the flange body 1-1.

[0040] Example 3:

[0041] This invention provides a furnace dismantling machine boom, including a base cover 2-1 and a rotary flange 1.

[0042] See Figure 2 The rotary flange 1 provided in this embodiment adopts the structure described in Embodiment 1, that is, a locking groove 1-3 is opened on the flange body 1-1, and the base cover 2-1 serves as the connection object of the rotary flange 1, and a locking block 1-4 is provided on it. During assembly, the base cover 2-1 and the rotary flange 1 are fixedly connected by connecting bolts 3 and locking blocks 1-4 with double redundancy.

[0043] See Figure 3 The furnace dismantling machine boom provided in this embodiment also includes a boom support 2-2, a rotary gearbox 2-3 mounted on the boom support 2-2, and a boom cylinder 2-9 that supplies hydraulic oil to the boom. The rotary gearbox 2-3 is connected to the rotary flange 1 and is used to drive the boom to rotate. The total length of the boom support 2-2 and the rotary gearbox 2-3 is extended to 2880mm, and compared with the prior art, the rotary flange 1 is moved forward by 500mm. (Continue to see...) Figure 3The furnace dismantling machine boom also includes a working arm 2-4, rollers 2-5, and a telescopic arm 2-6 arranged sequentially. The telescopic arm 2-6 is connected to a hydraulic hammer 2-8 via a tool cylinder 2-7; the hydraulic hammer 2-8 is connected to a chisel 2-10; the working arm 2-4 is connected to the rotary flange 1 via the base cover 2-1. In this embodiment, the total length of the telescopic arm 2-6 is shortened to 3500mm, which is 400mm shorter than the prior art. The distance between the end face of the telescopic arm 2-6 near the roller 2-5 and the connecting end face of the rotary flange 1 is shortened to 3620mm, which is 600mm shorter than the prior art. Therefore, this embodiment of the invention shortens the total length of the furnace dismantling machine boom by 500mm compared to the existing boom, which not only reduces the boom's weight, thereby reducing the tension of the connecting bolts 3, but also reduces the risk of the connecting bolts 3 breaking due to longitudinal force; moreover, the sway amplitude of the shortened boom can be controlled within a very small range, thereby improving the accuracy of the furnace dismantling operation. To ensure that the working radius of the furnace dismantling machine boom remains unchanged, the chisel 2-10 in this embodiment of the invention is a chisel 2-10 with a length extended by 500mm.

[0044] In this embodiment, the locking blocks 1-4 can be formed by heat treatment of Q460 steel, achieving a surface hardness of HRC52-55 (GB / T230.1). The dimensions of the locking blocks 1-4 are 39.90mm × 19.96mm × 19.9mm (corresponding to length × width × height), with a tolerance of H7 / g6. The load-bearing capacity of a single locking block 1-4 is ≥1500kN (checked by GB / T3811). The dimensions of the locking groove 1-3 can be set to 40mm × 20mm × 20mm (corresponding to length × width × depth). After the rotary flange 1 and the base cover 2-1 are assembled, a high-preload friction pair is formed between them, with a friction coefficient μ ≥ 0.18.

[0045] The connecting bolt 3 is an M20-12.9 grade medium-diameter bolt with a preload of 70% of the bolt yield strength (approximately 640MPa). This ensures that the radial shear force generated by the furnace dismantling machine at any angle will not cause the boom bolt to break.

[0046] The following is a further detailed description of the material selection and processing of the furnace dismantling machine boom provided in the embodiments of the present invention:

[0047] 1. For the main structural material of the boom, high-strength alloy steel is an ideal choice. For example, Q355B alloy steel has high yield strength and tensile strength. The yield strength of Q355B can reach over 355MPa, which allows the boom to maintain structural stability under heavy loads. This alloy steel also has good toughness and weldability, facilitating subsequent welding and assembly processes. The stress value of the boom must not exceed 70% of the material's yield strength. When the boom's design working load is 10 tons, the maximum stress point of the boom is calculated through finite element analysis. During actual acceptance, the stress value at this point must be within the specified range.

[0048] 2. In critical areas of the boom, such as connection points and areas of concentrated stress, higher-grade materials or special treatments can be used. For example, at the connection between the boom and the fuselage, surface-hardened Q355B material can be used to improve the hardness and wear resistance of this area.

[0049] 3. The material processing is also crucial. Firstly, the cutting process, employing CNC flame cutting or plasma cutting technology, ensures cutting precision. For example, when cutting the sheet metal for the boom, a cutting accuracy of ±0.5mm is required. This precision ensures the compatibility of the various boom components during assembly.

[0050] 4. During the forming process, cold bending or hot bending processes should be used for the bent parts of the boom. In the hot bending process, the heating temperature and bending speed must be strictly controlled. For example, for Q355B alloy steel, the heating temperature should be controlled at 900-1000°C, and the bending speed should be 1-2 degrees per minute. This can prevent defects such as cracks from occurring in the material during the bending process.

[0051] 5. After processing, rigorous quality testing of the materials is required, including testing the material's hardness, strength, and other properties, as well as verifying the processed dimensions. For example, a hardness tester is used to test the hardness of key parts of the boom, requiring the hardness value to be within the specified range; a coordinate measuring machine is used to comprehensively inspect the processed dimensions of the boom to ensure that each dimension meets the design requirements.

[0052] The welding and assembly process of the boom is described in further detail below:

[0053] 1. Regarding welding technology, the appropriate welding method should be selected based on the material of the boom: For Q355B alloy steel, both manual arc welding and gas shielded welding are feasible options. Using carbon dioxide gas shielded welding, the welding speed can reach 30-50 cm per minute, offering advantages such as fast welding speed and high weld quality.

[0054] 2. Welding process parameters also need strict control. For CO2 gas shielded welding, the welding current is adjusted according to the diameter of the welding wire and the welding position. When using a 1.2mm diameter welding wire, the welding current in the flat welding position should be controlled at 180-220A, and the voltage at 22-24V. Such parameter settings can ensure the weld penetration and formation quality. For the welding process, parameters such as welding current, voltage, and welding speed must be monitored. When welding critical parts of the boom, the welding current deviation should not exceed 5A, and the welding speed should be maintained at 10-15cm / min. Furthermore, after welding, the weld should be subjected to non-destructive testing, such as ultrasonic testing and X-ray testing. According to industry experience, these testing methods can detect more than 90% of internal welding defects.

[0055] 3. Before welding, the workpieces must be thoroughly cleaned and pre-treated. Remove oil, rust, and other impurities from the surface of the workpieces, and grind the welding area to ensure a strong bond. Use an abrasive wheel for grinding, achieving a surface roughness of Ra6.3-Ra12.5.

[0056] 4. Assembly process is also a crucial step. Before assembly, each component must be numbered and marked to ensure the correct assembly sequence. The support structure components of the boom should be assembled from bottom to top. Before assembly, a tensile test should be performed on the boom connecting bolts 3, requiring the tensile force value to reach at least 1.2 times the design requirement to ensure the reliability of the connection. During assembly, appropriate tooling and fixtures should be used to ensure the relative positional accuracy between components.

[0057] 5. After assembly, the boom needs to be inspected and adjusted as a whole. This includes checking the dimensional accuracy of the boom and the firmness of the connections between the components.

[0058] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to explain the relative positional relationship and movement between components in a specific orientation. If the specific orientation changes, the directional indication will also change accordingly. These terms are used only for the convenience of describing this application and for simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0059] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0060] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A swivel flange comprising a flange body; a plurality of bolt holes are provided on the flange body for connection with a connection object by connection bolts; characterized in that, At least one locking groove is provided on the connecting end face of the flange body, which is adapted to the locking block fixedly connected on the connected object; or, at least one locking block is provided on the connecting end face of the flange body, which is adapted to the locking groove provided on the connected object. During assembly, the locking block is embedded in the locking groove and is interference-fitted with the locking groove to restrict relative rotation between the flange body and the connected object.

2. The swing flange of claim 1, wherein The plurality of bolt holes are evenly distributed on the same circumference with the center of the flange body as the center, and the central angles of adjacent bolt holes are equal.

3. A swing flange according to claim 1 or 2, c h a r a c t e r i z e d in that Both the locking groove and the locking block are provided in multiple quantities, and the number of both is equal and their positions correspond to each other.

4. The swing flange of claim 2, wherein, The locking grooves are distributed in multiples along the same circumference with the center of the flange body as the center; the multiple locking grooves and multiple bolt holes are distributed on different circumferences; the locking blocks are set in a one-to-one correspondence with the locking grooves.

5. The swing flange of claim 1, wherein There are four locking blocks, which are rectangular or cylindrical blocks.

6. The swing flange of claim 1, wherein, When the locking block is disposed on the flange body, it is integrally formed with the flange body; when the locking block is disposed on the connected object, it is integrally formed with the connected object.

7. A demolition robot boom characterized in that It includes a base cover and a slewing flange as described in any one of claims 1 to 4; the base cover serves as the connection object of the slewing flange and is fixedly connected to the slewing flange by connecting bolts and locking blocks.

8. The rig arm of claim 7, wherein, It also includes a boom support and a rotary gearbox mounted on the boom support, wherein the rotary gearbox is connected to the rotary flange; The total length of the boom support and slewing gearbox is extended to 2880mm.

9. The rig deformer boom of claim 8, wherein, It also includes a working arm, rollers, and telescopic arm arranged in sequence. The telescopic arm is connected to a hydraulic hammer head via a tool cylinder, and the hydraulic hammer head is connected to a chisel. The working arm is connected to the rotary flange via the base cover. The total length of the telescopic arm is shortened to 3500mm, and the distance between the end face of the telescopic arm near the roller and the connecting end face of the rotary flange is shortened to 3620mm; the chisel is selected with a length extended by 500mm to ensure that the working radius of the furnace dismantling machine boom remains unchanged.

10. The rig de-commissioner arm of claim 9, wherein, The locking block is made of Q460 steel and processed by heat treatment. The surface hardness reaches HRC52-55. The size of the locking block is 39.90mm×19.96mm×19.9mm, and the tolerance is H7 / g6. The load-bearing capacity of a single locking block is ≥1500kN.

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