A heavy cable laying millstone

Abstract

This application relates to a heavy-duty cable laying millstone, comprising a base and a supporting millstone. The base has a circular structure with a positioning tenon fixed at its center. The supporting millstone includes clamping discs and support rods. The support rods are clamped between two clamping discs and evenly distributed along the circumference of the clamping discs to form a star-shaped supporting structure. A central connector is provided through the center of the two clamping discs. The lower end of the central connector has a positioning mortise that matches the positioning tenon, forming a mortise and tenon joint pivot. The upper end is used to support the cable reel. Rolling components are provided at the outer ends of the support rods, with the bottom of the rolling components contacting the upper surface of the base. The star-shaped structure of the supporting millstone significantly improves its bending resistance, and the double-disc clamping and fixing structure further enhances the connection strength, avoiding structural deformation caused by local stress concentration. The central mortise and tenon connection and the circumferential support of multiple rollers form a double constraint, greatly reducing the rotation center deviation of the millstone and significantly improving its rotational stability.

Description

Technical Field

[0001] This application relates to the field of electromechanical installation technology, and in particular to a heavy-duty cable laying millstone. Background Technology

[0002] In large-scale energy projects such as hydropower stations and photovoltaic power stations, the weight of a single reel of heavy-duty cable often exceeds 3 tons, with a cross-section ≥240mm². Cable laying is a critical construction step, and its efficiency and safety directly affect the overall project progress. Among traditional equipment, crane-lifted laying and vertical cable support laying are the most common. Crane-lifted laying is severely limited by terrain due to the high cost of crane rental and use, and the need for ample space and relatively flat, solid ground. Vertical cable support laying, due to the relatively small contact area between the vertical support and the cable reel, struggles to provide sufficient stable support when laying heavy cables. As the cable is continuously laid out, the center of gravity of the cable reel gradually shifts, easily leading to tilting or even toppling. If this occurs, it not only interrupts the construction process but can also cause serious damage to the cable and even endanger the lives of construction workers.

[0003] Currently, there are a few horizontal cable laying devices that rely on a single-layer load-bearing component and a small number of support wheels to distribute the load. However, when applied to heavy cables, the low bending section modulus of the single-layer load-bearing component makes it prone to indentation and deformation under the weight of the heavy cable. Uneven distribution of stress points can also easily lead to bearing jamming or wheel damage. In actual construction, this type of equipment can only be used for small to medium cross-section cables with a single reel weight of ≤1 ton. When dealing with heavy cables such as main cables of hydropower stations and collector cables of photovoltaic power stations, it often forces work to stop due to insufficient load-bearing capacity, and may even cause safety accidents such as cable reel tipping and cable scratch damage. Furthermore, due to the lack of a central constraint structure, the center of rotation is prone to shift with the cable tension, resulting in uneven cable release and a "sudden loosening and tightening" phenomenon, increasing the risk of cable tensile damage. When applied to downhill areas, the cable reel is prone to automatic rotation due to gravity, causing disordered cable release and increasing construction safety hazards. Utility Model Content

[0004] To solve or partially solve the problems existing in related technologies, this application provides a heavy cable laying millstone, which stably supports heavy cables through a cross-shaped bearing millstone and a double disc clamping and fixing structure, and ensures stable and safe rotation by means of double center constraints and optimized bearings.

[0005] The first aspect of this application provides a heavy-duty cable laying mill, comprising: The base is a circular structure with a positioning tenon fixed in the center. A bearing grinding disc comprises a clamping disc and a plurality of support rods, wherein the support rods are clamped between two clamping discs and are evenly distributed along the circumferential direction of the clamping discs to form a "rice"-shaped bearing structure. A central connecting piece is fixedly arranged penetrating through the centers of the two clamping discs, the lower end of the central connecting piece is provided with a positioning mortise adapted to a positioning tenon, so that the positioning connection forms a mortise-tenon rotating shaft, the upper end is used for bearing a cable reel, the outer end of each support rod is provided with a rolling assembly, and the bottom of the rolling assembly is in contact with the upper surface of a base.

[0006] Wherein, the rolling assembly comprises an outer bearing member and a double-row self-aligning roller bearing penetrating inside the outer bearing member, the rollers of the double-row self-aligning roller bearing are arranged in parallel, and a spacer retainer is arranged between the rollers.

[0007] Wherein, the number of the support rods is 8, the 8 support rods are evenly distributed at 360° along the circumferential direction of the clamping disc, and the included angle between two adjacent support rods is 45°.

[0008] Wherein, the outer end of each support rod is bent vertically downward to connect with a supporting piece, and the rolling assembly is fixedly connected below each section of the supporting piece.

[0009] Wherein, the rolling assemblies are circumferentially distributed along the outer contour of the bearing grinding disc, and the axis of the rolling assemblies is parallel to the axis of the central connecting piece.

[0010] The technical solution provided by the present application can include the following beneficial effects: The present application provides a heavy cable laying grinding disc, which adopts a plurality of high-strength support rods, and is welded with upper and lower double clamping discs to form a rice-shaped structure, the bending resistance is greatly improved, can stably bear the load of heavy cables, and fully covers the cable laying requirements of hydropower stations and photovoltaic power stations; the double-disc clamping and fixing structure further improves the connection strength and avoids structural deformation caused by local stress concentration. The dispersed stress of multiple rollers greatly reduces the load borne by a single roller, effectively solves the problems that the bearing of traditional equipment is easy to jam and the wheel body is easy to damage, and the service life of the equipment is significantly prolonged. The central mortise-tenon connection of the device and the circumferential support of multiple rollers form double constraints, which greatly reduces the rotation center deviation of the grinding disc, significantly improves the rotation stability, improves the uniformity of cable release, and effectively avoids the tensile damage of the cable caused by "loose and tight" changes; at the same time, the self-locking property of the mortise-tenon connection can prevent the cable reel from rotating automatically on downhill sections, and solves the out-of-control risk of traditional equipment.

[0011] It should be understood that the foregoing general description and the following detailed description are both exemplary and explanatory, and should not be construed as limiting the present application. Description of Drawings

[0012] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0013] Figure 1 This is a schematic diagram of the structure of the heavy cable laying millstone shown in the embodiments of this application; Figure 2 This is a side view schematic diagram (AA) of a heavy cable laying millstone shown in an embodiment of this application; Figure label: In the diagram, 1-supporting grinding disc, 2-base, 3-tenon and mortise pivot, 4-clamping disc, 5-roller. Detailed Implementation

[0014] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0015] 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 information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0016] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0017] Unless otherwise expressly specified and defined, terms such as "installation", "connection", "coupling", and "fixing" shall be interpreted in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integrated structure; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication between two elements or the interaction between two elements. A person skilled in the art can understand the specific meanings of the above terms in the present application according to specific circumstances.

[0018] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0019] As Figure 1 and Figure 2 shown, a grinding disc for unreeling heavy cables comprises a base 2 and a carrying grinding disc 1. The base 2 is of a circular structure, and a positioning tenon is fixedly arranged at the center position; the carrying grinding disc 1 comprises clamping discs 4 and a plurality of support rods, the support rods are clamped between the two clamping discs 4 and are uniformly distributed along the circumferential direction of the clamping discs 4 to form a cross-shaped carrying structure. The number of the support rods is 8, the 8 support rods are uniformly distributed at 360° along the circumferential direction of the clamping discs, and the included angle between two adjacent support rods is 45°.

[0020] A central connecting piece is fixedly arranged through the centers of the two clamping discs, the lower end of the central connecting piece is provided with a positioning mortise adapted to the positioning tenon, the positioning connection forms a tenon-mortise rotating shaft 3, and the upper end is used for carrying a cable reel. The outer ends of the support rods are all vertically bent downward to connect with supporting pieces, a rolling assembly is fixedly connected below each section of supporting piece, and the bottom of the rolling assembly is in contact with the upper surface of the base 2. The rolling assemblies are circumferentially distributed along the outer contour of the carrying grinding disc 1, and the axis of the rolling assemblies is parallel to the axis of the central connecting piece. The rolling assembly comprises an outer carrying member and a double-row self-aligning roller bearing penetrating inside the outer carrying member, the rollers of the double-row self-aligning roller bearing are arranged in parallel, and a spacing retainer is arranged between the rollers.

[0021] In one specific embodiment, the star-shaped grinding disc is formed by welding eight sections of channel steel between two upper and lower steel plate discs. The channel steel is 14a grade, welded together from two φ380mm, 6mm thick steel plates to form the star shape. The outer contour is 1660mm, providing sufficient bending resistance to stably lay all heavy cables on the construction site. A section of steel pipe is welded through the center of the disc, protruding a certain length from both ends to serve as mortises connecting the base 2 and the cable reel. A 10mm thick steel plate, φ1560mm, has a steel pipe tenon welded to its center as the base 2, with a lifting hole on its edge. The base 2 has sufficient rigidity, allowing it to be leveled with wooden supports without requiring precise site leveling. A short section of channel steel is vertically welded to the outer ends of each of the eight channel steel sections, and rollers 5 are welded to the bottom of these channels. The rollers 5 are made of steel pipes welded with double-row self-aligning roller bearings. Made with national standard channel steel and steel pipes, the double-row self-aligning roller bearing can withstand large radial and axial loads. All components are meticulously welded together, making it suitable for laying heavy cables in hydropower stations, photovoltaic power stations, and other applications. Roller 5 utilizes a double-row self-aligning roller bearing with parallel rollers arranged internally. Spacers or separators between the rollers prevent tilting or friction, effectively preventing an increase in rotational torque. This bearing has a high radial load capacity and can withstand heavy loads and impact loads. Furthermore, due to its self-aligning properties, it can withstand axial loads in both directions to some extent.

[0022] 1. Place the millstone base after supporting the square timber. 2. Install the millstone and hoist the cable reel onto it. Manually drag one end of the cable; the cable reel will rotate on the cable laying millstone to lay the cable. An appropriate number of cable laying racks should be placed along the cable's path to prevent the cable from being dragged on the ground.

[0023] Installation and usage process of the device: Using a crane and a dump truck, the cable-laying millstone was moved to the work site, which was relatively flat and firm. The base 2 was stabilized with wooden blocks, and then the mortise in the center of the cross-shaped millstone was aligned with the tenon in the center of the base 2 and fastened. At this time, the rotation center of the cross-shaped millstone was fixed, and the eight rollers 5 in the middle layer were evenly distributed on the upper surface of the base 2, forming a "circular rolling support".

[0024] Use a crane to hoist the cable reel onto the top of the star-shaped millstone. Position the cable reel using the protruding part of the central connector. Then, manually drag one end of the cable (or use a winch to drag it uphill). The cable will generate a horizontal tension on the cable reel. Since the cable reel is fixed to the star-shaped millstone, this tension will be transmitted to the millstone, causing it to rotate.

[0025] When the millstone tends to rotate, the eight rollers 5 fixed to it are driven by the millstone. The bottom of the rollers 5 contacts the fixed upper surface of the base 2. At this time, the rollers 5 roll in a circumferential direction on the upper surface of the base 2. All eight rollers 5 roll in the same direction, either clockwise or counterclockwise. Since the rollers 5 are fixed to the millstone, the rolling of the rollers 5 directly drives the millstone to rotate around the "mortise and tenon connection point", which in turn drives the cable reel above to rotate synchronously, and the cable is smoothly released from the cable reel.

[0026] Due to the tenon and mortise connection and the restriction of the rolling direction of roller 5, the cable reel will not rotate automatically due to gravity even when working on a slope: the tenon and mortise of the base 2 and the grinding disc restrict the grinding disc to rotate only around the center and will not slide along the slope. Furthermore, roller 5 can only roll along the circumference of the grinding disc's rotation, not along the slope. Therefore, even on a slope, as long as there is no pulling force dragging the cable, the grinding disc will not drive roller 5 to roll, and the cable reel will not rotate automatically, preventing the cable from being released arbitrarily and causing damage.

[0027] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0028] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0029] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0030] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0031] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A heavy-duty cable laying millstone, characterized in that, Comprising: a base, wherein the base is of a circular structure, and a positioning tenon is fixedly arranged at the center position; a bearing grinding disc, wherein the bearing grinding disc comprises two clamping discs and a plurality of support rods, the support rods are clamped between the two clamping discs and are uniformly distributed along the circumferential direction of the clamping discs to form a "meter"-shaped bearing structure, a central connecting piece is fixedly arranged penetrating through the centers of the two clamping discs, the lower end of the central connecting piece is provided with a positioning mortise adapted to the positioning tenon, a tenon-mortise rotating shaft is formed through positioning connection, the upper end of the central connecting piece is used for bearing a cable reel, the outer end of each support rod is provided with a rolling assembly, and the bottom of the rolling assembly is in contact with the upper surface of the base.

2. The heavy cable laying millstone according to claim 1, characterized in that, the rolling assembly comprises an outer bearing piece and a double-row self-aligning roller bearing penetrating through the inner part of the outer bearing piece, the rollers of the double-row self-aligning roller bearing are arranged in parallel, and a spacer retainer is arranged between the rollers.

3. The heavy-duty cable laying millstone according to claim 1, characterized in that, the number of the support rods is 8, the 8 support rods are uniformly distributed at 360° along the circumferential direction of the clamping disc, and the included angle between two adjacent support rods is 45°.

4. The heavy-duty cable laying millstone according to claim 1, characterized in that, the outer end of each support rod is vertically bent downward to connect with a support member, and the rolling assembly is fixedly connected below each section of the support member.

5. The heavy-duty cable laying millstone according to claim 1, characterized in that, the rolling assemblies are circumferentially distributed along the outer contour of the bearing grinding disc, and the axis of each rolling assembly is parallel to the axis of the central connecting piece.

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