A limiting seat for a balance arm of a metallurgical vehicle

Abstract

A kind of metallurgical car balanced arm limiting seat, it is related to crane wire rope balance system technical field, including support seat, cantilever connecting seat, hinged seat, balanced arm, adjustable connecting device and limit switch.Support seat and cantilever connecting seat adopt double-layer modular interface, can quickly combine multiple height and overhang length, cancel non-standard customization, shorten production cycle and reduce inventory;Field maintenance can be replaced by module.Hinged seat is swung by first and second hinged shafts arranged vertically in space, with double degrees of freedom before and after balanced arm, left and right, compensates track error and partial load, avoids wire rope torsion and reduces bending moment.Adjustable connecting device is symmetrically configured on both sides of support seat, C-shaped guide rail realizes vertical stepless lifting, ensures constant triggering gap, eliminates false alarm and missed report.The utility model can significantly shorten production cycle, reduce inventory cost, improve equipment availability and safety redundancy.

Description

Technical Field

[0001] This utility model relates to the technical field of crane wire rope balancing systems, and in particular to a limiting seat for a metallurgical vehicle balancing arm. Background Technology

[0002] Metallurgical vehicles (especially casting cranes, ladle transport cars, and molten iron ladle cars) rely on the two wire ropes of the hoisting mechanism to support molten metal or heavy ladles. Due to uneven tracks, uneven load on the lifting equipment, starting and braking impacts, and ladle swaying, the tension of the two wire ropes often momentarily becomes inconsistent, causing the balance arm (a lever-type tension balancing device) to sway in both directions. In existing technology, the balance arm is usually directly fixed to the trolley frame through a single-degree-of-freedom hinge point, limiting its swing range and making it unable to simultaneously compensate for uneven loads in both directions. Long-term forced deformation accelerates the wear of the hinge shaft and bearings, and may even lead to safety accidents such as wire rope overload, derailment, or fatigue fracture of structural components.

[0003] To monitor and limit the extreme swing of the balance arm, engineering commonly employs the method of installing mechanical dead stops or ordinary limit switches on both sides of the balance arm. However, traditional solutions have the following drawbacks:

[0004] 1. High structural rigidity and poor adaptability:

[0005] The fixed stop is welded to the frame, and its position cannot be adjusted once it is determined. When the on-site working conditions change (such as replacing the balance arm of different length, or the wire rope being stretched or re-tensioned), it can only be cut and re-welded, which has a long construction period and is prone to damaging the base material.

[0006] 2. Low triggering accuracy and high false alarm rate:

[0007] Ordinary limit switches are fixed by a single-point bolt and lack a multi-dimensional adjustment mechanism. Installation errors and frame welding deformation can lead to inconsistent trigger gaps. When the balance arm swings in three-dimensional space, "missed triggers" or "false triggers" often occur, affecting production continuity.

[0008] 3. Difficult to maintain and poor spare parts compatibility:

[0009] Metallurgical vehicles of different tonnages and spans require separately designed supports and switch brackets. The variety of parts and poor interchangeability increase inventory costs and cause inconvenience to on-site maintenance.

[0010] In summary, developing a limit seat for the balance arm of a metallurgical vehicle that can swing freely in both directions, has a precisely adjustable trigger position, and can be quickly assembled in a series has become an urgent need to improve the safety and maintenance economy of metallurgical vehicles. Utility Model Content

[0011] In order to overcome the shortcomings of the prior art, this utility model discloses a limiting seat for a balance arm of a metallurgical vehicle.

[0012] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0013] A limiting seat for a balance arm of a metallurgical vehicle includes:

[0014] Support base;

[0015] The bottom of one end of the cantilever connector is fastened to the top of the support base.

[0016] A hinged joint is located at the cantilevered end of the cantilever connector.

[0017] The first hinge shaft is installed between the hinge seat and the cantilever connecting seat to make the top of the hinge seat corresponding to the cantilever connecting seat hinged.

[0018] The second hinge shaft is installed at the bottom of the hinge seat, and the second hinge shaft is perpendicular to the first hinge shaft;

[0019] The balance arm is hinged to the bottom of the hinge seat via a second hinge axis;

[0020] Two adjustable connecting devices are installed on both sides of the support base;

[0021] Two limit switches are installed on two adjustable connecting devices respectively; one of the limit switches can be triggered when the balance arm deflects excessively around the second hinge axis.

[0022] Preferably, the adjustable connection device includes:

[0023] The connecting column is fastened to the support base at its bottom.

[0024] The connecting bracket has a Z-shaped bending structure; a limit switch is installed at one end of the connecting bracket, and the other end is connected to the corresponding connecting column.

[0025] Preferably, the connecting column has a C-shaped guide rail structure; a connecting plate is slidably connected inside it, and a locking screw that is threadedly connected to the connecting plate is provided at one end of the connecting bracket corresponding to the connecting column; the height of the connecting bracket can be adjusted by loosening the locking screw.

[0026] Preferably, the connecting bracket has a plurality of elongated holes at intervals at one end of the connecting column for installing locking screws.

[0027] Preferably, the limit switch is rotatably connected to the connecting bracket via a T-shaped shaft; the small end of the T-shaped shaft moves through the connecting bracket and is then securely connected to the limit switch; a torsion spring for keeping the limit switch horizontal is installed between the large end of the T-shaped shaft and the connecting bracket; the torsion spring switch has a torque greater than the triggering force of the limit switch.

[0028] Preferably, the detection end of the limit switch is threadedly connected to an extension rod.

[0029] By adopting the technical solution described above, this utility model has the following beneficial effects:

[0030] (1) This utility model achieves serialized rapid selection through a double-layer modular interface structure of “support seat-cantilever connecting seat”: the support seat provides a variety of heights and the cantilever connecting seat provides a variety of cantilever lengths. The two can be combined as needed by simply tightening bolts, completely eliminating the traditional non-standard customization, significantly shortening the production cycle and reducing inventory costs simultaneously; at the same time, the standard interface ensures installation interchangeability, and the module can be directly replaced during on-site maintenance without disassembling the whole set.

[0031] (2) The hinge seat of this utility model provides the balance arm with dual degrees of freedom of swinging in the front and back and left and right through the first and second hinge shafts arranged in "spatial verticality": the first hinge shaft allows a certain range of front and back swing to compensate for longitudinal track error, and the second hinge shaft allows a certain range of left and right swing to compensate for lateral load; the two shafts do not interfere with each other, which not only avoids the twisting of the wire rope, but also reduces the additional bending moment of the structure, and the overall force is more reasonable.

[0032] (3) The two sets of adjustable connecting devices symmetrically arranged on both sides of the support base make the installation position of the limit switch three-dimensionally adjustable: the C-shaped guide rail realizes stepless vertical lifting, the long hole realizes forward and backward translation, and the extension rod realizes the lengthening of the detection end, ensuring that no matter how the balance arm swings, the trigger gap is always kept within the design value, thereby eliminating false alarms or missed alarms and greatly improving the reliability of the alarm.

[0033] (4) The present invention further adds a T-shaped shaft-torsion spring clearance mechanism at the end of the connecting bracket. When the balance arm deflects abnormally and forces the limit switch to be triggered, if the deflection continues to increase, the limit switch can flexibly retract with the rotation of the T-shaped shaft to avoid rigid collision. After the abnormality is eliminated, the torsion spring automatically resets without manual adjustment, which not only protects the limit switch body, but also shortens the downtime for maintenance, further improving the availability and safety redundancy of the equipment. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of this utility model;

[0035] Figure 2 This is a side view of the present invention;

[0036] Figure 3 Top view of the adjustable connection device;

[0037] Figure 4 This is a schematic diagram of the adjustable connection device.

[0038] In the diagram: 1. Support base; 2. Cantilever connecting base; 3. Hinge base; 4. First hinge shaft; 5. Second hinge shaft; 6. Balance arm; 7. Adjustable connecting device; 7-1. Connecting column; 7-2. Connecting bracket; 7-3. Connecting plate; 7-4. Locking screw; 7-5. T-shaft; 7-6. Torsion spring; 7-7. Long slot; 8. Limit switch; 9. Extension rod. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0040] In the description of this utility model, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. They are only used to facilitate the description of this utility model and to simplify 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. Therefore, they should not be construed as limitations on this utility model.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] Example 1:

[0043] Combined with appendix Figures 1-4 A limiting seat for a balance arm of a metallurgical vehicle includes a support base 1, a cantilever connecting seat 2, an adjustable connecting device 7, and a limit switch 8. The support base 1 serves as the overall mounting foundation, its bottom surface is bolted to the trolley frame of the metallurgical vehicle's lifting mechanism, and its top surface is machined with a standard interface corresponding to the cantilever connecting seat 2. One end of the cantilever connecting seat 2 is bolted to the top of the support base 1; the other end of the cantilever connecting seat 2 is suspended, and the suspended end of the cantilever connecting seat 2 has a mounting cavity for the balance arm 6 to be inserted. A friction-reducing bushing is provided inside the mounting cavity to reduce swing resistance.

[0044] It is important to note that the support base 1 and the cantilever connector 2 can be designed in a series and modular manner. For example, the support base 1 is available in various height specifications, and the cantilever connector 2 is available in various overhang length specifications. The two can be quickly combined according to the actual working conditions without the need for separate customization, which can significantly shorten the production cycle and reduce inventory costs.

[0045] A hinge seat 3 is installed at the suspended end of the cantilever connecting seat 2 via a first hinge shaft 4. Specifically, the first hinge shaft 4 passes through the shaft hole at the top of both the cantilever connecting seat 2 and the hinge seat 3, and is limited at both ends by retaining springs, so that the top of the hinge seat 3 is hinged to the cantilever connecting seat 2. A bushing perpendicular to the first hinge shaft 4 is provided at the bottom of the hinge seat 3, and a second hinge shaft 5 is installed inside this bushing, with the second hinge shaft 5 spatially perpendicular to the first hinge shaft 4. A through hole is machined in the middle of the balance arm 6 to mate with the second hinge shaft 5. The balance arm 6 is hinged to the bottom of the hinge seat 3 via the second hinge shaft 5, and both sides are axially fixed by shaft end retaining rings. During operation, the two steel wire ropes of the metallurgical vehicle lifting mechanism are respectively fastened to both ends of the balance arm 6 via pressure plates. The balance arm 6 uses the lever principle to balance the tension of the two steel wire ropes. The counterweight arm 6 can swing back and forth within a certain range around the first hinge axis 4, and can swing left and right within a certain range around the second hinge axis 5. The dual-degree-of-freedom structure can effectively compensate for the complex working conditions caused by uneven load, swaying and uneven track during the lifting process of the metallurgical vehicle.

[0046] Two sets of adjustable connecting devices 7 are symmetrically arranged on the left and right sides of the support base 1, and each set of adjustable connecting devices 7 is equipped with a limit switch 8. When the balance arm 6 deflects excessively around the second hinge axis 5, the end of the balance arm 6 can trigger the limit switch 8 on the corresponding side. After the limit switch 8 is triggered, it immediately sends an alarm signal to the control system to remind the operator to take timely action and avoid safety accidents such as wire rope overload or equipment collision.

[0047] The adjustable connecting device 7 mainly consists of a connecting column 7-1, a connecting bracket 7-2, a connecting plate 7-3, and a locking screw 7-4. The bottom of the connecting column 7-1 is bolted to the support base 1 via a flange, and the connecting column 7-1 has an overall C-shaped guide rail structure. The connecting plate 7-3 is slidably installed inside the C-shaped guide rail, and can move vertically and is fixed in place by the locking screw 7-4. The connecting bracket 7-2 is a Z-shaped bent steel plate; one end is bolted to the limit switch 8, and the other end is fitted with the locking screw 7-4, which is threaded onto the connecting plate 7-3. Loosening the locking screw 7-4 allows the connecting bracket 7-2 to slide up and down, enabling continuous adjustment of the height position of the limit switch 8 and ensuring that the trigger gap between the limit switch 8 and the balance arm 6 meets design requirements.

[0048] To further improve installation flexibility, two elongated holes 7-7 are opened at intervals along the length of one end of the connecting bracket 7-2 corresponding to the connecting column 7-1. The locking screw 7-4 passes through the elongated holes 7-7 and is connected to the connecting plate 7-3. Loosening the locking screw 7-4 allows the connecting bracket 7-2 to be moved back and forth, so that the detection end of the limit switch 8 is accurately aligned with the trigger surface of the balance arm 6.

[0049] In addition, the detection end of the limit switch 8 is threadedly connected to the extension rod 9. The length of the extension rod 9 is selected according to the actual on-site measurement to prevent the balance arm 6 from swinging out of the detection range of the limit switch 8 after a large swing around the first hinge axis 4, thus ensuring reliable triggering.

[0050] Example 2:

[0051] Combined with appendix Figure 3 A limiting seat for a metallurgical vehicle balance arm differs from Embodiment 1 in that, based on Embodiment 1, the limiting switch 8 is rotatably connected to the connecting bracket 7-2 via a T-shaped shaft 7-5. The small end of the T-shaped shaft 7-5 movably passes through the through hole at the end of the connecting bracket 7-2 and is then securely connected to the housing of the limiting switch 8. The large end of the T-shaped shaft 7-5 is a disc, and a torsion spring 7-6 is installed between the disc and the connecting bracket 7-2. The torsion spring 7-6 is fitted onto the smooth shaft section of the T-shaped shaft 7-5, with one end inserted into the limiting groove of the connecting bracket 7-2 and the other end inserted into the disc. The preset torque of the torsion spring 7-6 is greater than the triggering force of the limiting switch 8.

[0052] When the counterweight arm 6 triggers the limit switch 8 due to abnormal off-center load, if the deflection continues to increase, the counterweight arm 6 will push the limit switch 8 to overcome the torque of the torsion spring 7-6 and drive the T-shaft 7-5 to rotate. The limit switch 8 will then move aside, avoiding damage to the limit switch 8 due to rigid collision. When the counterweight arm 6 returns to its normal swing range, the limit switch 8 will automatically reset to its initial horizontal position under the action of the torsion spring 7-6, without the need for manual adjustment. This extends the service life of the limit switch 8 and reduces downtime for maintenance.

[0053] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents within this utility model.

Claims

1. A limiting seat for a balance arm of a metallurgical vehicle, characterized in that, include: Support base (1); The bottom of one end of the cantilever connecting seat (2) is fastened to the top of the support seat (1); The hinged seat (3) is located at the cantilevered end of the cantilever connecting seat (2); The first hinge shaft (4) is installed between the hinge seat (3) and the cantilever connecting seat (2) to make the top of the hinge seat (3) and the cantilever connecting seat (2) be hinged to each other. The second hinge shaft (5) is installed at the bottom of the hinge seat (3), and the second hinge shaft (5) is perpendicular to the first hinge shaft (4); The balance arm (6) is hinged to the bottom of the hinge seat (3) via the second hinge shaft (5); Two adjustable connecting devices (7) are respectively installed on both sides of the support base (1); Two limit switches (8) are installed on two adjustable connecting devices (7); one of the limit switches (8) can be triggered when the balance arm (6) deflects excessively around the second hinge axis (5).

2. The limiting seat for the balance arm of a metallurgical vehicle as described in claim 1, characterized in that, The adjustable connection device (7) includes: The connecting column (7-1) is fastened to the support base (1) at its bottom; The connecting bracket (7-2) has a Z-shaped bending structure; one end of the connecting bracket (7-2) is equipped with a limit switch (8), and the other end is connected to the connecting column (7-1).

3. The limiting seat for the balance arm of a metallurgical vehicle as described in claim 2, characterized in that: The connecting column (7-1) has a C-shaped guide rail structure; a connecting plate (7-3) is slidably connected inside it, and a locking screw (7-4) that is threadedly connected to the connecting plate (7-3) is provided at one end of the connecting column (7-1); the height of the connecting bracket (7-2) can be adjusted by loosening the locking screw (7-4).

4. The limiting seat for the balance arm of a metallurgical vehicle as described in claim 3, characterized in that: The connecting bracket (7-2) is provided with a plurality of elongated holes (7-7) at intervals at one end of the connecting column (7-1) for installing locking screws (7-4).

5. The limiting seat for the balance arm of a metallurgical vehicle as described in claim 2, characterized in that: The limit switch (8) is rotatably connected to the connecting bracket (7-2) via a T-shaped shaft (7-5); the small end of the T-shaped shaft (7-5) moves through the connecting bracket (7-2) and is then fastened to the limit switch (8); a torsion spring (7-6) is installed between the large end of the T-shaped shaft (7-5) and the connecting bracket (7-2) to keep the limit switch (8) horizontal; the torsion spring (7-6) has a torque greater than the triggering force of the limit switch (8).

6. The limiting seat for the balance arm of a metallurgical vehicle as described in any one of claims 1 to 5, characterized in that: The detection end of the limit switch (8) is threadedly connected to an extension rod (9).

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