A working arm for slagging

Abstract

The utility model provides a kind of working arm for scraping slag, including outer supporting arm, telescopic arm and multiple gyro wheels, outer supporting arm has the sliding cavity of one end opening;Telescopic arm is telescopic along sliding cavity;The outer end of telescopic arm is equipped with scraping slag plate;Multiple gyro wheels are respectively rotatably connected on outer supporting arm, and with the outer wall of telescopic arm rolling cooperation, and / or respectively rotatably connected on telescopic arm, and with the cavity wall of sliding cavity rolling cooperation;At least one or each gyro wheel is connected with distance adjusting structure, distance adjusting structure is used to adjust the distance between gyro wheel and the outer wall of telescopic arm, and / or for adjusting the distance between gyro wheel and the cavity wall of sliding cavity.The utility model provides a kind of working arm for scraping slag, through the synergic effect of multiple gyro wheels and distance adjusting structure, ensure that outer supporting arm and telescopic arm always keep stable cooperation, effectively prolong the service life of working arm, improve the operation precision and operation continuity of the scraping slag plate of the outer end of telescopic arm, help to improve the efficiency of steel production.

Description

Technical Field

[0001] This utility model belongs to the field of iron and steel metallurgical equipment technology, specifically relating to a slag removal working arm. Background Technology

[0002] In the steel production process, if the slag on the surface of the molten iron in the ladle is not removed in time, it will have an adverse effect on the quality of the molten steel. The slag remover is a key piece of equipment specifically designed to remove such slag, and its performance is directly related to the efficiency and quality of steel production.

[0003] Most slag remover booms are equipped with telescopic functionality to meet the needs of slag removal operations in different scenarios. However, existing slag remover booms are prone to vertical jumping or sliding jamming during the telescopic process, which not only seriously affects the service life and operational reliability of the boom, but also reduces the precision of slag removal operations and restricts the improvement of steel production efficiency. Utility Model Content

[0004] This utility model provides a working arm for slag removal, which aims to solve the technical problem that the working arm of the slag remover is prone to vertical jumping or sliding jamming during extension and retraction, which seriously affects the service life of the working arm and reduces the accuracy of slag removal operations.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a slag removal working arm, comprising:

[0006] The outer support arm has a sliding cavity with an opening at one end;

[0007] The telescopic arm extends outward or retracts inward along the sliding cavity; the outer end of the telescopic arm is provided with a slag-removing plate; and

[0008] Multiple rollers are rotatably connected to the outer support arm and roll in cooperation with the outer wall of the telescopic arm, and / or rotatably connected to the telescopic arm and roll in cooperation with the cavity wall of the sliding cavity; at least one or each of the rollers is connected to an adjusting structure, the adjusting structure being used to adjust the distance between the roller and the outer wall of the telescopic arm, and / or to adjust the distance between the roller and the cavity wall of the sliding cavity.

[0009] In one possible implementation, the adjustment structure includes:

[0010] An eccentric shaft has a positioning part, a rotating part and an eccentric part connected in sequence. The rotating part is rotatably engaged with the outer support arm / the telescopic arm. The roller is rotatably sleeved on the outer periphery of the eccentric part. The positioning part is detachably connected to the outer support arm / the telescopic arm.

[0011] The eccentric part can drive the roller to produce radial displacement when the rotating part rotates.

[0012] In some embodiments, the positioning part and the rotating part are coaxially arranged, and the positioning part has a polygonal cross-section; the adjustment structure further includes:

[0013] A positioning plate having a plug-in portion, wherein the plug-in portion is plugged into and engaged with the positioning portion; and

[0014] Fasteners are installed through the positioning plate and are threadedly connected to the outer support arm / the telescopic arm.

[0015] In some embodiments, the positioning plate is provided with an arc-shaped long groove, the arc-shaped long groove is coaxially arranged with the rotating part, and the outer support arm / the telescopic arm is provided with a plurality of threaded holes, the plurality of threaded holes being spaced apart along the direction of the arc-shaped long groove;

[0016] The fastener passes through the arc-shaped groove and is threadedly connected to one of the threaded holes.

[0017] In one possible implementation, the plurality of rollers are divided into:

[0018] A first roller assembly, located at one end of the outer support arm near the opening, includes a first upper roller and a first lower roller. The first upper roller rolls in contact with the outer top wall of the telescopic arm, and the first lower roller rolls in contact with the outer bottom wall of the telescopic arm. The first upper roller is equipped with the adjustable distance structure.

[0019] The second roller assembly is located at the inner end of the telescopic arm and includes a second upper roller and a second lower roller. The second upper roller rolls in contact with the top wall of the sliding cavity, and the second lower roller rolls in contact with the bottom wall of the sliding cavity. The second lower roller is equipped with the adjustable distance structure.

[0020] In some embodiments, the first roller group further includes two first side rollers, which are in rolling engagement with the two outer side walls of the telescopic arm in a one-to-one correspondence.

[0021] The second roller assembly also includes two second side rollers, which roll in a one-to-one correspondence with the two side walls of the sliding cavity.

[0022] In one possible implementation, the inner end of the telescopic arm is provided with a downwardly protruding travel limit block, and a first travel switch is connected to the outer support arm. The limit rod of the first travel switch extends into the inner cavity of the outer support arm and is used to contact the travel limit block to limit the displacement of the travel limit block.

[0023] In some embodiments, a first limiting block is also connected to the outer support arm. The first limiting block is located on the side of the first limit switch near the opening. The first limiting block is used to abut against the travel limiting block to limit the displacement of the travel limiting block.

[0024] In one possible implementation, the outer end of the telescopic arm is provided with an electric limit rod, and a second limit switch is connected to the outer side wall of the outer support arm. The second limit switch is used to contact the electric limit rod to limit the displacement of the electric limit rod.

[0025] In some embodiments, the outer end of the telescopic arm is further provided with a second limiting block, which is used to abut against the open end of the outer support arm to limit the retraction stroke of the telescopic arm.

[0026] The beneficial effects of the slag-removing working arm provided in this application embodiment are as follows: Compared with the prior art, the slag-removing working arm of this embodiment, by setting multiple rollers between the telescopic arm and the outer support arm, and equipping at least one roller with an adjustable distance structure to adjust the distance between the roller and the corresponding mating wall surface, can dynamically compensate for processing errors and maintain the optimal mating clearance between the roller and the telescopic arm or between the roller and the outer support arm; the synergistic effect of the roller and the adjustable distance structure ensures that the outer support arm and the telescopic arm always maintain a stable fit, eliminating the risk of jamming and preventing shaking problems, effectively extending the service life of the working arm, improving the operating accuracy and operation continuity of the slag-removing plate at the outer end of the telescopic arm, and contributing to the improvement of steel production efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the structure of a slag removal working arm provided in an embodiment of this utility model;

[0029] Figure 2 A cross-sectional view of a slag removal working arm provided for an embodiment of this utility model;

[0030] Figure 3 This is an embodiment of the present utility model. Figure 2 Schematic diagram of the middle section;

[0031] Figure 4 This is an embodiment of the present utility model. Figure 3 Schematic diagram of the cross-sectional structure along line AA;

[0032] Figure 5 This is an embodiment of the present utility model. Figure 3 A top-view structural diagram;

[0033] Figure 6 This is an embodiment of the present utility model. Figure 2 Schematic diagram of the middle section;

[0034] Figure 7 This is a schematic diagram of the eccentric shaft provided in an embodiment of the present invention.

[0035] The following are the labeling elements in the figure:

[0036] 1. Outer support arm; 11. Sliding cavity; 12. Threaded hole; 13. First limit switch; 14. First limit stop; 15. Second limit switch; 2. Telescopic arm; 21. Stroke limit block; 22. Electrical limit rod; 23. Second limit stop; 24. Extension arm; 3. Slag removal plate; 4. Adjustable distance structure; 41. Eccentric shaft; 411. Positioning part; 412. Rotating part; 413. Eccentric part; 42. Positioning plate; 421. Insertion part; 422. Arc-shaped long groove; 43. Fastener; 5. First roller group; 51. First upper roller; 52. First lower roller; 53. First side roller; 6. Second roller group; 61. Second upper roller; 62. Second lower roller; 63. Second side roller; 7. Chain drive mechanism; 71. Chain. Detailed Implementation

[0037] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0038] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0039] Please refer to the following: Figures 1 to 7 The present invention provides a slag-removing working arm. The slag-removing working arm includes an outer support arm 1, a telescopic arm 2, and multiple rollers. The outer support arm 1 has a sliding cavity 11 with one open end. The telescopic arm 2 extends outward or retracts inward along the sliding cavity 11. A slag-removing plate 3 is provided at the outer end of the telescopic arm 2. Multiple rollers are rotatably connected to the outer support arm 1 and roll in cooperation with the outer wall of the telescopic arm 2, and / or rotatably connected to the telescopic arm 2 and roll in cooperation with the cavity wall of the sliding cavity 11. At least one or each roller is connected to an adjusting structure 4, which is used to adjust the distance between the roller and the outer wall of the telescopic arm 2, and / or to adjust the distance between the roller and the cavity wall of the sliding cavity 11.

[0040] It should be understood that the inner end of the telescopic arm 2 refers to the end located inside the sliding cavity 11, while the outer end of the telescopic arm 2 is the end that can slide outward.

[0041] This embodiment provides a slag-removing working arm. Compared with the prior art, it significantly reduces the telescopic resistance and lowers the wear rate of the contact surface by using multiple rollers arranged between the telescopic arm 2 and the outer support arm 1. At the same time, the distance between the rollers and the corresponding mating wall surfaces can be adjusted by the adjusting structure 4, which can dynamically compensate for processing errors to maintain the optimal mating clearance between the rollers and the telescopic arm 2 or between the rollers and the outer support arm 1. The synergistic effect of the rollers and the adjusting structure 4 ensures that the outer support arm 1 and the telescopic arm 2 always maintain a stable fit, eliminating the risk of jamming and preventing shaking problems, effectively extending the service life of the working arm, improving the operating accuracy and continuity of the slag-removing plate 3 at the outer end of the telescopic arm 2, and contributing to the improvement of steel production efficiency.

[0042] In this embodiment, both the outer support arm 1 and the telescopic arm 2 are rectangular tubular structures welded from steel plates. The outer support arm 1 is used to connect to the main body of the slag removal equipment, and its sliding cavity 11 has a rectangular cross-section, providing a stable telescopic guide space for the telescopic arm 2. Multiple rollers respectively roll in contact with the outer wall of the telescopic arm 2 or the cavity wall of the sliding cavity 11, transforming traditional sliding friction into rolling friction, significantly reducing telescopic resistance, fundamentally reducing jamming caused by excessive friction, and simultaneously reducing the wear rate of the contact surfaces, thus extending the service life of the outer support arm 1 and the telescopic arm 2.

[0043] During actual installation of the working arm, due to certain machining errors in the sliding cavity 11 of the telescopic arm 2 or the outer support arm 1, the fit tolerance between the roller and the telescopic arm 2 or between the roller and the sliding cavity 11 may be too large or too small. If the fit tolerance is too large, it will cause the telescopic arm 2 to shake. If the fit tolerance is too small, it will cause the telescopic arm 2 to slide and get stuck, which will aggravate the wear between the contact surfaces.

[0044] To address the aforementioned issues, the adjustable clearance structure 4 in this embodiment can precisely adjust the fit clearance between the roller and the telescopic arm 2, or between the roller and the outer support arm 1, to compensate for machining errors (such as dimensional tolerances and geometric tolerances) of the outer support arm 1 or the telescopic arm 2, as well as alignment deviations during installation, ensuring that the roller maintains the optimal fit clearance with the corresponding mating wall surface. Furthermore, for working arms that have undergone long-term use, as the roller or mating wall surface wears down, the gap can be further adjusted through the adjustable clearance structure 4 to restore a stable fit, demonstrating high practical value.

[0045] Multiple rollers can cooperate with the telescopic arm 2 or the sliding cavity 11 from different directions to form a multi-dimensional rigid constraint. At the same time, combined with the adjustable gap structure 4, a stable gap is maintained, so that the telescopic trajectory of the telescopic arm 2 always remains in a straight line, which greatly improves the working accuracy of the slag removal plate 3 and avoids problems such as missed slag removal and collision with containers caused by shaking.

[0046] The adjustable distance structure 4 can adopt an adjusting bolt and spring structure. By rotating the adjusting bolt, it moves axially along the outer support arm 1 / telescopic arm 2 to push the roller axle to move, thereby realizing the adjustment of the distance between the roller and the corresponding mating wall surface. The spring is sleeved on the roller axle to provide preload.

[0047] The adjustment structure 4 can also adopt a wedge block structure: a fixed wedge block is set on the outer support arm 1 / telescopic arm 2, and the wheel axle of the roller is set on the movable wedge block. An adjustment screw is set on the movable wedge block. By rotating the adjustment screw, the movable wedge block is driven to slide along the inclined surface of the fixed wedge block to adjust the position of the roller, thereby adjusting the mating clearance.

[0048] Specifically, a chain drive mechanism 7 is connected to the outer support arm 1. The chain drive mechanism 7 drives the telescopic arm 2 to slide via a chain 71. One end of the chain 71 is connected to the outer end of the telescopic arm 2, and the other end of the chain 71 is connected to the inner end of the telescopic arm 2. The outer support arm 1 is also equipped with two sprockets, which press against the outer side of the chain 71 to ensure that the tension of the chain 71 on the telescopic arm 2 is consistent with the telescopic direction of the telescopic arm 2. This avoids the generation of lateral forces that would cause the telescopic arm 2 to bear additional bending moments, thus ensuring the driving efficiency of the chain drive mechanism 7.

[0049] When installing the working arm, the telescopic arm 2 is inserted into the sliding cavity 11 of the outer support arm 1. The distance between the roller and the corresponding wall surface is adjusted using the adjusting structure 4 to ensure that the telescopic arm 2 and the outer support arm 1 are in the optimal matching state, so that the telescopic arm 2 can slide smoothly and stably. Several operating holes are provided on the side wall of the outer support arm 1, which not only reduces its weight but also facilitates the adjustment operation of the adjusting structure 4 located in the sliding cavity 11.

[0050] When slag removal is required, the chain drive mechanism 7 is activated, pulling the inner end of the telescopic arm 2 outward via the chain 71. With the assistance of multiple rollers, the telescopic arm 2 slides outward along the sliding cavity 11 of the outer support arm 1. As the telescopic arm 2 extends outward, the slag removal plate 3 connected to its outer end moves synchronously to the slag position on the surface of the molten iron in the ladle, completing the slag removal operation. Afterward, the chain drive mechanism 7 reverses its direction, pulling the outer end of the telescopic arm 2 inward via the chain 71, thereby causing the telescopic arm 2 to slide inward and retract, resetting the slag removal plate 3.

[0051] More specifically, the outer end of the telescopic boom 2 is also connected to an extension arm 24, and the slag removal plate 3 is set on the extension arm 24. The extension arm 24 is welded from I-beams and its volume and weight are smaller than those of the telescopic boom 2, which enables the outer end of the telescopic boom 2 to achieve a lightweight design. This not only effectively extends the working radius of the slag removal plate 3, but also avoids the phenomenon of the working arm shaking as a whole due to excessive forward shift of the center of gravity when the telescopic boom 2 is extended, thus improving operational safety.

[0052] In some embodiments, the above-described adjusting structure 4 can be adopted as follows: Figure 3 , Figure 4 , Figure 6 and Figure 7 The structure shown. See also Figure 3 , Figure 4 , Figure 6 and Figure 7The adjustable structure 4 includes an eccentric shaft 41, which has a positioning part 411, a rotating part 412 and an eccentric part 413 connected in sequence. The rotating part 412 is rotatably engaged with the outer support arm 1 / telescopic arm 2. The roller is rotatably sleeved on the outer periphery of the eccentric part 413. The positioning part 411 is detachably connected to the outer support arm 1 / telescopic arm 2. The eccentric part 413 can drive the roller to generate radial displacement when the rotating part 412 rotates.

[0053] Because there is an eccentricity between the eccentric part 413 and the rotating part 412, the eccentric part 413 will generate radial displacement when it rotates with the eccentric shaft 41, which will cause the roller sleeved on its outer periphery to move closer to or away from the mating surface (the outer wall of the telescopic arm 2 or the cavity wall of the sliding cavity 11). After confirming that the mating clearance meets the requirements, the rotation angle of the eccentric shaft 41 is positioned by the connection relationship between the positioning part 411 and the outer support arm 1 / telescopic arm 2, so as to maintain the mating clearance between the roller and the mating surface.

[0054] Specifically, the positioning part 411 and the outer support arm 1 / telescopic arm 2 can be connected by bolts and nuts, or by a combination of snap-fit ​​plates and screws. As long as the positioning part 411 and the outer support arm 1 / telescopic arm 2 can be detachably connected, and the connection relationship can be kept stable, it is acceptable.

[0055] In the above process, the rotational engagement of the rotating part 412 with the outer support arm 1 / telescopic arm 2 provides stable rotational support for the eccentric shaft 41, making the adjustment process smooth and without jamming, and facilitating the operator to precisely control the position of the roller by rotating the eccentric shaft 41. The eccentric part 413 is the core of realizing the roller position adjustment, and its eccentric design directly determines the adjustment range.

[0056] The eccentric shaft 41, through the integrated structure of the positioning part 411, the rotating part 412, and the eccentric part 413 connected in sequence, simplifies the overall layout of the adjustable distance structure 4, and can achieve stable adjustment of the roller position without additional guide components, ensuring the precise cooperation between the telescopic arm 2 and the outer support arm 1, and reducing assembly complexity and manufacturing cost.

[0057] In some possible embodiments, the positioning part 411 and the rotating part 412 are coaxially arranged, and the positioning part 411 has a polygonal cross section; the adjusting structure 4 also includes a positioning plate 42 and a fastener 43, the positioning plate 42 has a plug-in part 421, the plug-in part 421 is plugged into the positioning part 411; the fastener 43 is disposed through the positioning plate 42 and is threadedly connected to the outer support arm 1 / telescopic arm 2.

[0058] In this embodiment, the positioning part 411 and the rotating part 412 are coaxially arranged to ensure the stability of the axis when the eccentric shaft 41 rotates, avoiding deviation of the roller movement trajectory due to axis offset during adjustment, and ensuring the accuracy of gap adjustment. The positioning part 411 with a polygonal cross section forms a rigid insertion fit with the insertion part 421 of the positioning plate 42, which can reliably transmit rotational force. The rotation of the eccentric shaft 41 can be achieved by rotating the positioning plate 42 without slippage. At the same time, after adjustment, the multi-faceted contact between the insertion part 421 and the positioning part 411 restricts the rotation of the positioning part 411. Combined with the connection effect of the fastener 43, a double fixation is formed, effectively preventing the eccentric shaft 41 from loosening due to operational vibration, and ensuring the long-term stability of the roller position.

[0059] With the above structure, the position of the roller can be adjusted by simply rotating the positioning plate 42 while loosening the fastener 43. After the adjustment is completed, the position can be locked by tightening the fastener 43. The operation is simple and adaptable to the needs of rapid on-site maintenance. Furthermore, the stable gap control eliminates the shaking or jamming phenomenon when the working arm is extended or retracted.

[0060] Specifically, fastener 43 is a screw.

[0061] For example, the positioning plate 42 is provided with an arc-shaped long groove 422, which is coaxially arranged with the rotating part 412. The outer support arm 1 / telescopic arm 2 is provided with a plurality of threaded holes 12, which are spaced apart along the direction of the arc-shaped long groove 422. The fastener 43 passes through the arc-shaped long groove 422 and is threadedly connected to one of the threaded holes 12.

[0062] Multiple threaded holes 12 spaced along the arc-shaped long groove 422 on the outer support arm 1 / telescopic arm 2 ensure that at least one threaded hole 12 is always connected to the arc-shaped long groove 422 within the rotation adjustment range of the positioning plate 42, providing a connection point for the fastener 43 to adapt to the current adjustment angle and ensuring the fixed connection of the fastener 43 to the positioning plate 42.

[0063] Specifically, the machining error of the telescopic arm 2 or the outer support arm 1 determines the adjustment displacement of the roller, which in turn determines the eccentricity and rotation angle of the eccentric shaft 41, and thus the length of the arc-shaped long groove 422. The arc-shaped long groove 422 enables stepless adjustment of the positioning plate 42 and the eccentric shaft 41 within the adjustable range, which helps to improve the adjustment accuracy of the roller position.

[0064] In some embodiments, the arrangement of the plurality of rollers can be as follows: Figure 3 , Figure 4 and Figure 6 The structure shown. See also Figure 3 , Figure 4 and Figure 6The multiple rollers are divided into a first roller group 5 and a second roller group 6. The first roller group 5 is located at the end of the outer support arm 1 near the opening, and includes a first upper roller 51 and a first lower roller 52. The first upper roller 51 rolls with the outer top wall of the telescopic arm 2, and the first lower roller 52 rolls with the outer bottom wall of the telescopic arm 2. The first upper roller 51 is equipped with an adjustment structure 4. The second roller group 6 is located at the inner end of the telescopic arm 2, and includes a second upper roller 61 and a second lower roller 62. The second upper roller 61 rolls with the top wall of the sliding cavity 11, and the second lower roller 62 rolls with the bottom wall of the sliding cavity 11. The second lower roller 62 is equipped with an adjustment structure 4.

[0065] The first roller group 5 is located at the open end of the outer support arm 1. During the sliding extension and retraction of the telescopic arm 2, it can roll and support the outer peripheral wall of the telescopic arm 2, forming a front-end guide support structure. The second roller group 6 is located at the inner end of the telescopic arm 2. It can move synchronously with the telescopic arm 2 and roll and support the cavity wall of the sliding cavity 11, forming a rear-end guide support structure. The first roller group 5 and the second roller group 6 provide stable multi-point support and precise path guidance for the telescopic arm 2, limiting the vertical jump and straightness error of the telescopic arm 2 to a minimum, and significantly improving the stability of the extension and retraction process.

[0066] In this embodiment, see Figure 4 The first lower roller 52 is rotatably connected to the outer support arm 1, and its position remains fixed. The first upper roller 51 is connected to the outer support arm 1 through the adjusting structure 4, which allows for fine-tuning of its position. When installing the telescopic arm 2, the first lower roller 52 can be used as a reference, and the vertical position of the first upper roller 51 can be adjusted through the adjusting structure 4. This adjusts the installation wheelbase between the first upper roller 51 and the first lower roller 52 to accommodate changes in the height of the telescopic arm 2 caused by machining errors, ensuring precise fit between the first upper roller 51, the first lower roller 52, and the telescopic arm 2.

[0067] Similarly, see Figure 6 The second upper roller 61 is rotatably connected to the inner end of the telescopic arm 2, and the second lower roller 62 is connected to the telescopic arm 2 through the adjusting structure 4. The position of the second lower roller 62 is finely adjusted by the adjusting structure 4, thereby realizing the fine adjustment of the installation wheelbase between the second upper roller 61 and the second lower roller 62, so as to ensure that the second upper roller 61 and the second lower roller 62 can accurately fit with the cavity wall of the sliding cavity 11.

[0068] By equipping the first upper roller 51 and the second lower roller 62 with the adjustment structure 4, the number of adjustment structures 4 is reduced, the manufacturing cost is lowered, and the focus can be placed on the gap error point with the greatest impact. During on-site maintenance, the overall stability can be restored by operating the two sets of adjustment structures 4, which is suitable for the high-frequency and high-efficiency maintenance needs of steel plants.

[0069] Specifically, two first upper rollers 51 and two first lower rollers 52 are symmetrically provided to form four-point support for the telescopic arm 2, thereby further improving the telescopic stability of the telescopic arm 2.

[0070] See some possible embodiments. Figure 2 The first roller group 5 also includes two first side rollers 53, which are in rolling engagement with the two outer side walls of the telescopic arm 2; the second roller group 6 also includes two second side rollers 63, which are in rolling engagement with the two cavity side walls of the sliding cavity 11.

[0071] The first side roller 53 is rotatably connected to the outer support arm 1, and its axis extends vertically to form a rolling fit with the outer side wall of the telescopic arm 2; the second side roller 63 is rotatably connected to the telescopic arm 2, and its axis also extends vertically to form a rolling fit with the side wall of the sliding cavity 11.

[0072] By setting two first side rollers 53 and two second side rollers 63, the swing amplitude of the telescopic boom 2 in the horizontal lateral direction is effectively limited, preventing structural collisions or jamming caused by lateral swaying, and providing an effective guarantee for the efficient and stable operation of the telescopic boom 2.

[0073] The first roller group 5 and the second roller group 6 form multi-dimensional constraints on both ends of the telescopic arm 2 from the top, bottom, and sides, respectively, ensuring the straightness of the telescopic arm 2 during extension and retraction and improving the positional accuracy of the slag removal plate 3. At the same time, the rolling of each part cooperates to greatly reduce the extension and retraction resistance of the telescopic arm 2. Combined with the driving force of the chain drive mechanism 7, the telescopic arm 2 maintains stable operation and improves the continuity of slag removal operations.

[0074] Based on the above embodiments, see Figure 2 The inner end of the telescopic arm 2 is provided with a downward protruding travel limit block 21. The outer support arm 1 is connected to a first travel switch 13. The limit rod of the first travel switch 13 extends into the inner cavity of the outer support arm 1 and is used to contact the travel limit block 21 to limit the displacement of the travel limit block 21.

[0075] It should be noted that the slag removal equipment is equipped with a controller, and the first limit switch 13 and the chain drive mechanism 7 are electrically connected to the controller.

[0076] When the telescopic arm 2 slides outward along the sliding cavity 11, the travel limit block 21 at the inner end of the telescopic arm 2 moves outward synchronously with the telescopic arm 2. When the telescopic arm 2 extends to the preset position, the travel limit block 21 contacts the limit rod of the first travel switch 13 and applies pressure, triggering the first travel switch 13. The first travel switch 13 then sends an electrical signal to the controller. After receiving the electrical signal, the controller controls the chain drive mechanism 7 to stop running, causing the telescopic arm 2 to stop extending, thereby limiting the extension stroke of the telescopic arm 2. Through the linkage between the first travel switch 13 and the chain drive mechanism 7, automatic control with trigger-and-stop is achieved, improving the control accuracy of the telescopic arm 2's stroke.

[0077] The first limit switch 13 adopts the limit switch in the prior art, which will not be described in detail here.

[0078] Furthermore, a first limit block 14 is also connected to the outer support arm 1. The first limit block 14 is located on the side of the first limit switch 13 near the opening. The first limit block 14 is used to abut against the travel limit block 21 to limit the displacement of the travel limit block 21.

[0079] Under normal operating conditions, when the telescopic arm 2 extends outward to the preset position, the travel limit block 21 triggers the first travel switch 13, thereby stopping the telescopic arm 2 from moving. When the linkage system of the first travel switch 13 fails unexpectedly, the first limit block 14 can act as a mechanical stop to stop the telescopic arm 2 from moving.

[0080] Specifically, when the first limit switch 13 fails to trigger normally due to a fault (such as contact sticking, signal line breakage, etc.), the travel limit block 21 will not be braked when it contacts the limit rod of the first limit switch 13. Instead, it will continue to move outward with the telescopic arm 2 beyond the limit rod until it contacts the first limit stop block 14 to form a rigid collision, thereby forcibly terminating the outward movement of the telescopic arm 2 and reducing equipment damage under extreme fault conditions.

[0081] The first limit stop 14 and the first travel switch 13 form a dual protection system with complementary functions, which not only ensures accurate control under normal working conditions, but also eliminates safety risks under extreme failures, significantly improving the operational reliability and safety of the telescopic boom 2 structure.

[0082] See some possible embodiments. Figure 5 The telescopic arm 2 is provided with an electric limit rod 22 at its outer end. A second limit switch 15 is connected to the outer side wall of the outer support arm 1. The second limit switch 15 is used to contact the electric limit rod 22 to limit the displacement of the electric limit rod 22.

[0083] The second limit switch 15 also adopts the limit switch structure in the prior art and is electrically connected to the controller of the slag removal equipment.

[0084] When the telescopic arm 2 retracts inward along the sliding cavity 11, the electric limit rod 22 at the outer end of the telescopic arm 2 moves inward synchronously with the telescopic arm 2. When the telescopic arm 2 retracts to the preset position, the electric limit rod 22 contacts the limit rod of the second limit switch 15 and triggers the second limit switch 15. Then, the chain drive mechanism 7 is stopped by the controller, so that the telescopic arm 2 stops retracting, thereby limiting the retraction stroke of the telescopic arm 2.

[0085] Preferably, the outer end of the telescopic arm 2 is also provided with a second limiting block 23, which is used to abut against the open end of the outer support arm 1 to limit the retraction stroke of the telescopic arm 2.

[0086] The second limit block 23 also serves as a mechanical limit when the second limit switch 15 fails. By using the rigid impact between the second limit block 23 and the opening end of the outer support arm 1, the telescopic arm 2 is forcibly prevented from retracting excessively, ensuring the safety and controllability of the retraction action and improving the overall reliability of the working arm operation.

[0087] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A slag removal arm, characterized in that, include: The outer support arm (1) has a sliding cavity (11) with one end open; The telescopic arm (2) extends outward or retracts inward along the sliding cavity (11); the outer end of the telescopic arm (2) is provided with a slag-removing plate (3); and Multiple rollers are rotatably connected to the outer support arm (1) and roll in cooperation with the outer wall of the telescopic arm (2), and / or rotatably connected to the telescopic arm (2) and roll in cooperation with the cavity wall of the sliding cavity (11); at least one or each of the rollers is connected to an adjustment structure (4), the adjustment structure (4) is used to adjust the distance between the roller and the outer wall of the telescopic arm (2), and / or to adjust the distance between the roller and the cavity wall of the sliding cavity (11).

2. The slag removal arm as described in claim 1, characterized in that, The adjustment structure (4) includes: An eccentric shaft (41) has a positioning part (411), a rotating part (412) and an eccentric part (413) connected in sequence. The rotating part (412) is rotatably engaged with the outer support arm (1) / the telescopic arm (2). The roller is rotatably sleeved on the outer periphery of the eccentric part (413). The positioning part (411) is detachably connected to the outer support arm (1) / the telescopic arm (2). The eccentric part (413) can drive the roller to generate radial displacement when the rotating part (412) rotates.

3. A slag removal arm as described in claim 2, characterized in that, The positioning part (411) and the rotating part (412) are coaxially arranged, and the positioning part (411) has a polygonal cross-section; the adjusting structure (4) further includes: The positioning plate (42) has a plug-in portion (421) that is plugged into the positioning portion (411); and Fastener (43) is provided through the positioning plate (42) and is threadedly connected to the outer support arm (1) / the telescopic arm (2).

4. A slag removal arm as described in claim 3, characterized in that, The positioning plate (42) is provided with an arc-shaped long groove (422), the arc-shaped long groove (422) is coaxially arranged with the rotating part (412), the outer support arm (1) / the telescopic arm (2) is provided with a plurality of threaded holes (12), and the plurality of threaded holes (12) are spaced apart along the direction of the arc-shaped long groove (422); The fastener (43) passes through the arc-shaped groove (422) and is threadedly connected to one of the threaded holes (12).

5. A slag removal arm as described in claim 1, characterized in that, The multiple rollers are divided into: A first roller assembly (5), located at one end of the outer support arm (1) near the opening, includes a first upper roller (51) and a first lower roller (52). The first upper roller (51) rolls in contact with the outer top wall of the telescopic arm (2), and the first lower roller (52) rolls in contact with the outer bottom wall of the telescopic arm (2). The first upper roller (51) is equipped with the adjustable distance structure (4). The second roller assembly (6) is located at the inner end of the telescopic arm (2) and includes a second upper roller (61) and a second lower roller (62). The second upper roller (61) rolls with the top wall of the sliding cavity (11), and the second lower roller (62) rolls with the bottom wall of the sliding cavity (11). The second lower roller (62) is equipped with the adjustable distance structure (4).

6. A slag removal arm as described in claim 5, characterized in that, The first roller group (5) also includes two first side rollers (53), and the two first side rollers (53) are in rolling cooperation with the two outer side walls of the telescopic arm (2) in a one-to-one correspondence; The second roller group (6) also includes two second side rollers (63), which are in rolling engagement with the two cavity sidewalls of the sliding cavity (11) in a one-to-one correspondence.

7. A slag removal arm as described in claim 1, characterized in that, The inner end of the telescopic arm (2) is provided with a downward protruding travel limit block (21), and the outer support arm (1) is connected to a first travel switch (13). The limit rod of the first travel switch (13) extends into the inner cavity of the outer support arm (1) and is used to contact the travel limit block (21) to limit the displacement of the travel limit block (21).

8. A slag removal arm as described in claim 7, characterized in that, The outer support arm (1) is also connected to a first limiting block (14), which is located on the side of the first limit switch (13) near the opening. The first limiting block (14) is used to abut against the travel limiting block (21) to limit the displacement of the travel limiting block (21).

9. A slag removal arm as described in claim 1, characterized in that, The telescopic arm (2) is provided with an electric limit rod (22) at its outer end. A second limit switch (15) is connected to the outer side wall of the outer support arm (1). The second limit switch (15) is used to contact the electric limit rod (22) to limit the displacement of the electric limit rod (22).

10. A slag removal arm as described in claim 9, characterized in that, The telescopic arm (2) is also provided with a second limiting block (23) at its outer end. The second limiting block (23) is used to abut against the open end of the outer support arm (1) to limit the retraction stroke of the telescopic arm (2).

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