Method for correcting trolley beam of double-beam crane

Abstract

The invention relates to a double-beam crane trolley beam correction method, which comprises the following steps of: heightening a trolley and releasing a bolt load, so that trolley wheels are separated from a trolley track and are suspended at a target height; distribution drilling holes of the trolley cross beam side plate are formed according to the correction plate, and the trolley cross beam side plate and the connecting plate are repositioned based on the distribution drilling holes; adjusting a gap and a hole position of the combined surfaces of the two half trolleys, tightly combining the combined surfaces of the trolleys through a bolt with a target matching length, and aligning a positioning hole of a connecting plate with a matched drilling hole of a transverse beam side plate of the trolley; and detecting the deflection of the beam, and judging whether correction is completed or not. The invention provides a double-beam crane trolley beam correction method. A trolley beam is reamed by prefabricating an overshoot correction connecting plate, bolts are re-adapted, the sinkage of the trolley beam is corrected to enable the trolley beam to meet the use specification, the crane trolley beam is maintained to be qualified to ensure that a trolley frame is on the same plane, a trolley runs stably, the use requirement is met, and potential safety hazards are eradicated.

Description

Technical Field

[0001] The present application relates to the technical field of cranes, and in particular to a method for calibrating a trolley beam of a double-beam crane. Background Art

[0002] Double-girder bridge crane is used to lift molten metal and works 24 hours a day. It is equipped with four trolley beams, two cross beams are parallel to the main beam, and two end beams are perpendicular to the main beam. Each cross beam consists of two sections of the same length, which are connected by connecting plates and bolts.

[0003] During long-term operation, the bottom of the beam sinks and deforms, and the maximum sinking position is in the middle of the beam, which creates a safety hazard. It is necessary to correct the trolley beam to ensure that the frame is in the same plane. A correction method is needed to repair the sinking and deformation of the trolley beam. Summary of the invention

[0004] In order to solve or partially solve the problems existing in the related art, the present application provides a double-beam crane trolley beam correction method, which corrects the sinking amount of the trolley beam to meet the usage specifications.

[0005] The first aspect of the present application provides a double-beam crane trolley beam calibration method, comprising the following steps:

[0006] Raise the trolley and release the bolt load to make the wheels of the trolley leave the trolley track and hang at the target height;

[0007] Arrange the drilled holes of the trolley beam side plate according to the correction plate, and reposition the trolley beam side plate and the connecting plate based on the drilled holes;

[0008] Adjust the gap and hole position of the joint surface of the two halves of the trolley, use the target matching length bolts to make the joint surface of the trolley tightly connected, and align the positioning holes of the connecting plate with the matching holes of the side plate of the trolley cross beam;

[0009] Detect the amount of beam sinking and determine whether the correction is completed.

[0010] Among them, after the test run, the sinking amount of the beam is detected. When the sinking amount at the maximum point is ≤2.8mm, the correction is considered to be completed.

[0011] Among them, the bottom surface of the trolley beam is supported by a hydraulic jack to lift the entire trolley frame, and the target height is 50mm.

[0012] Among them, the target matching length of the bolt is 30mm.

[0013] The technical solution provided by this application may have the following beneficial effects:

[0014] The present application provides a double-beam crane trolley beam correction method, which uses a prefabricated overshoot correction connecting plate to drill holes in the trolley beam and re-adapt bolts to correct the sinking of the trolley beam to meet the usage specifications. Qualified maintenance of the crane trolley beam ensures that the frame is in the same plane, allowing the trolley to run smoothly, meet the usage requirements, and eliminate safety hazards.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0017] Figure 1 It is a schematic diagram of the process structure of the method shown in the embodiment of the present application;

[0018] Figure 2 is a schematic diagram of the force on the trolley beam shown in an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of the connection between the bolts and the side plate before correction shown in an embodiment of the present application;

[0020] Figure 4 is a schematic diagram of the connection between the bolts and the side plate after correction shown in an embodiment of the present application;

[0021] Reference numerals:

[0022] In the figure, 1 is the trolley frame, 2 is the connecting plate, 3 is the wheel, and 4 is the side plate. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0024] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0025] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0028] like Figure 1 The double-beam crane trolley beam correction method shown includes the following steps:

[0029] S1, raise the trolley and release the bolt load, so that the trolley wheel 3 is off the trolley track and suspended at the target height.

[0030] There are 4 trolley beams in a 50t double-beam bridge crane. The two beams parallel to the main beam are cross beams, and the end beams perpendicular to the main beam are end beams. Each cross beam consists of two sections of the same length, connected by connecting plates 2 and bolts. Figure 2 As shown, after a period of use, the bottom of the beam sinks and deforms, and the maximum sinking position is in the middle of the beam. After measurement, the bottom of the beam sinks 8mm.

[0031] Move the crane to the construction position at the end of the factory building, move the trolley to the end of the crane main beam opposite the cab, cut off the power supply of the crane, lower the main and auxiliary hooks to the ground, hang the auxiliary hook on the main hook with a wire rope, and at the same time lift the main and auxiliary hooks to the appropriate positions so that the wire rope of the auxiliary hook is in a relaxed state.

[0032] Use four 50t hydraulic jacks to support the bottom surface of the trolley beam and lift the entire trolley frame. The trolley frame 1 is raised as a whole, and the bolt load is released to make the trolley wheel 3 detach from the trolley track and hang 50mm in the air. Use pads to pad the position next to the connecting plate 2 at the bottom of the trolley beam, and relax the jacks to balance the force on the trolley beam so that the connecting plate 2 is not subject to shear force.

[0033] S2. Arrange the matching drill holes of the trolley cross beam side plate 4 according to the correction plate, and reposition the trolley cross beam side plate 4 and the connecting plate 2 based on the matching drill holes.

[0034] S3. Adjust the gap and hole position of the joint surface of the two halves of the trolley, make the joint surface of the trolley tightly combined by bolts of target matching length, and align the positioning holes of the connecting plate 2 with the matching drilled holes of the trolley cross beam side plate 4.

[0035] Loosen all the connecting bolts, remove some of the bolts on the side connecting plate 2, use the self-made overshoot correction plate and the matching holes of the trolley beam side plate 4, remove the M20×50 bolts (matching length is 16mm) of the side plate 4 connecting plate 2 one by one, and replace them with M20×65 bolts (matching length is 30mm). Reposition the connecting plate 2 and the trolley beam side plate 4 according to the unworn section holes. When replacing the bolts, use a hand chain hoist and a jack to adjust the gap and each hole position of the two halves of the trolley joint surface, so that the trolley joint surface is tightly combined and the gap is consistent from top to bottom, and the positioning holes of each hole connecting plate 2 and side plate 4 are aligned.

[0036] S4. Detect the amount of sinking of the beam and determine whether the correction is completed.

[0037] After replacing the connecting bolts, pull the wire on the bottom of the trolley to check the sinking repair of the bottom of the trolley. The maximum sinking amount is ≤2.8mm, which meets the specifications. Re-tighten the upper and lower cover bolts, and the crossbeam correction is completed. Correct the front and rear bolts and the side panels. Figure 3 , Figure 4 shown.

[0038] Finally, it should be noted that, in this article, relationships such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms include, include or any other variations are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0040] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A double-beam crane trolley beam calibration method, characterized in that: The following steps are involved: Raise the trolley and release the bolt load to make the wheels of the trolley leave the trolley track and hang at the target height; Arrange the matching drill holes of the trolley beam side plate according to the correction plate, and reposition the trolley beam side plate and the connecting plate based on the matching drill holes; Adjust the gap and hole position of the joint surface of the two halves of the trolley, and tightly connect the joint surface of the trolley through the bolts of the target matching length, and align the positioning holes of the connecting plate with the matching drill holes of the side plate of the trolley cross beam; Detect the amount of beam sinking and determine whether the correction is completed.

2. The double-beam crane trolley beam calibration method according to claim 1, characterized in that: After the test run, the sinking amount of the beam is detected. When the sinking amount at the maximum point is ≤2.8mm, the calibration is considered completed.

3. The double-beam crane trolley beam calibration method according to claim 1, characterized in that: The bottom surface of the trolley beam is supported by a hydraulic jack to lift the entire trolley frame, and the target height is 50 mm.

4. The double-beam crane trolley beam calibration method according to claim 1, characterized in that: The target matching length of the bolt is 30 mm.

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