Composite plummet

Abstract

The utility model discloses a kind of composite plummet, it is related to railway catenary technical field, the composite plummet, including plummet piece, the plummet piece is discoid.The bottom of the plummet piece is opened with two opposite holding grooves along axis symmetry, for providing " holding point " when artificial handling plummet piece.At the same time, the plummet piece is equipped with reinforcing mechanism, can evenly disperse longitudinal tension and transverse impact force that plummet piece bears.The utility model composite plummet is formed by double three-dimensional frame of reinforcing bar reinforcing part inside plummet piece cooperation horizontal rib and vertical rib, while setting protection layer, and design holding groove and the positioning structure of protruding, pit and round groove, both solve the problem that existing composite plummet is inconvenient to artificial handling, installation is easily displaced, also solve the problem of poor durability, finally by screw rod piece, plummet rod and bottom plate cooperation form complete plummet string, provide constant tension for catenary stability, guarantee its good elasticity and predetermined height.

Description

Technical Field

[0001] This utility model relates to the field of railway catenary technology, and in particular to a composite weight. Background Technology

[0002] As the core carrier for electric locomotives to obtain electrical energy, the overhead contact system of electrified railways plays a crucial role in stably transmitting electrical energy from traction substations to the locomotives. To ensure the reliability of electric locomotives drawing current from the contact system via pantographs, it is necessary to guarantee that the contact suspension maintains good elasticity and the predetermined contact height under complex operating conditions such as temperature changes. This requirement is mainly achieved by setting up a series of weights in the contact system. The weight of the weights provides constant tension between the contact cable and the contact wire, thereby maintaining the normal operating condition of the contact system.

[0003] Currently, the composite weights widely used in electrified railway catenary systems are typically designed with a single weight of 25 kg, stacked in strings of 20. However, existing composite weights have several technical shortcomings in practical applications:

[0004] Firstly, due to the weight and structure limitations of a single piece, manual handling and installation are laborious and inconvenient. Furthermore, after installation, the weight string is prone to poor vertical alignment. During long-term use, the weight block may shift due to factors such as vibration, affecting tension stability.

[0005] Secondly, existing technologies for protecting the surface of composite weights mostly involve spraying topcoat or exterior wall paint. These protective layers have weak adhesion and are prone to peeling and failure when exposed to natural environments such as ultraviolet rays, rain, and sandstorms for a long time, thus losing their protective function. This ultimately leads to problems such as corrosion, water absorption, weathering, peeling, and even pulverization of the weights, significantly shortening their service life. This not only increases maintenance costs but may also pose a potential risk to the stability of the overhead contact system and the safety of railway operations due to the failure of the weights. Utility Model Content

[0006] The present invention provides a composite weight that can solve the problems of inconvenient handling of composite weights, inconsistent vertical positions of weights after installation, and displacement between weight blocks. It can also solve the problem of poor durability of the protective layer on the surface of the weight.

[0007] This utility model provides a composite weight, including a weight component, which is disc-shaped. Two opposing gripping grooves are symmetrically formed along the axis at the bottom of the weight component, providing "grip points" when the weight is manually handled.

[0008] Meanwhile, the weight component is equipped with a reinforcing mechanism, which can evenly distribute the longitudinal tension and lateral impact force borne by the weight component.

[0009] The top of the weight has positioning holes at both ends. A protrusion is fixedly connected to the top of the weight outside the positioning hole, and a recess is formed at the bottom of the weight below the inner cavity of the positioning hole.

[0010] Preferably, the front side of the weight piece has a through groove, wherein the groove width is 20mm and the groove length is the radius of the weight piece disc.

[0011] Preferably, the surface of the weight is coated with a protective layer, and the material of the protective layer is epoxy resin.

[0012] Preferably, the epoxy resin is a two-component formulation, with one component being epoxy adhesive and the other being a curing agent, and the mixing ratio of epoxy adhesive and curing agent is 4:1.

[0013] Preferably, the reinforcing mechanism includes steel reinforcement members arranged symmetrically in the upper and lower parts, wherein the main body of the steel reinforcement member is a round steel bar, and transverse ribs are connected to the inner surface of the steel reinforcement member.

[0014] Preferably, vertical bars are evenly distributed between the two steel reinforcement members, wherein the surface of the horizontal bars is connected with reinforcing bars, and the two horizontal bars are fixedly connected by the reinforcing bars.

[0015] Preferably, the grip groove has a height of 18mm, a depth of 30mm, and a width of 90mm.

[0016] Preferably, the diameter of the positioning hole is 20mm, the height of the protrusion is 5mm, and the diameter is 35mm, wherein the diameter of the recess is 40mm and the depth of the recess is 8mm.

[0017] Preferably, the inner side of the grip groove cavity is provided with diamond-shaped anti-slip texture to increase friction during manual handling.

[0018] The composite weight provided in this embodiment of the utility model, compared with the prior art:

[0019] This invention utilizes a double-layered three-dimensional frame formed by internal steel reinforcement components and horizontal and vertical ribs in the weight assembly. This frame evenly distributes longitudinal tension and lateral impact force, effectively preventing cracking caused by localized stress concentration and significantly extending service life. The protective layer on the surface of the weight assembly reliably prevents rainwater infiltration while resisting UV aging and chemical corrosion, preventing rust, weathering, or peeling. The symmetrical grip grooves at the bottom of the weight assembly provide convenient holding points for manual handling, are ergonomically designed, and have anti-slip textures, saving effort and preventing the weight from slipping. During installation and stacking, the precise fit of the protrusions and recesses prevents lateral displacement and improves installation consistency. Finally, the weight assembly is fixed by screws and forms a complete weight string with the weight rod and base plate, providing constant tension for the stability of the contact wire and ensuring good elasticity and the predetermined height of the contact wire. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the composite weight according to an embodiment of the present utility model;

[0022] Figure 2 This is a three-dimensional schematic diagram of the internal structure of the composite weight according to an embodiment of the present utility model;

[0023] Figure 3 This is a top view of the internal structure of the composite weight according to an embodiment of the present invention;

[0024] Figure 4 This is an embodiment of the present utility model. Figure 3 Schematic diagram of the structural section at point AA along the middle edge;

[0025] Figure 5 This is a three-dimensional schematic diagram of the reinforcing mechanism structure according to an embodiment of the present utility model;

[0026] Figure 6 This is a front view schematic diagram of the reinforcing mechanism structure according to an embodiment of the present utility model;

[0027] Figure 7 This is a top view of the reinforcing mechanism structure according to an embodiment of the present utility model;

[0028] Figure 8 This is a top view schematic diagram of the composite weight structure according to an embodiment of the present utility model;

[0029] Figure 9 This is a schematic front sectional view of the weight component structure according to an embodiment of the present utility model;

[0030] Figure 10 This is a schematic diagram of the weight string structure according to an embodiment of the present utility model;

[0031] Figure 11 This is a second schematic diagram of the weight string structure according to an embodiment of the present utility model;

[0032] Figure 12 The third schematic diagram is of the weight string structure of this utility model embodiment.

[0033] Reference numerals: 100, weight; 110, groove; 200, grip groove; 300, positioning hole; 400, protrusion; 410, pit; 500, protective layer; 600, reinforcing bar; 610, horizontal bar; 620, vertical bar; 700, threaded rod; 710, base plate; 720, weight rod. Detailed Implementation

[0034] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0035] Please refer to Figures 1 to 9 This utility model embodiment provides a composite weight, including a weight component 100. In actual implementation, the weight component 100 can be flexibly adjusted according to the catenary installation scenario. The weight component 100 can be one of the following shapes: elliptical, rectangular, disc-shaped, or other shapes; the weight component 100 is preferably disc-shaped.

[0036] The weight component 100 uses high-strength cement as the base material and is mixed with counterweight slag, iron powder, and iron sand. This ratio can meet the standard weight requirement of 25kg for a single weight and is compatible with the existing weight string installation specifications. It can also reduce the volume of the main body through the high density characteristics of iron powder and iron sand. At the same time, the combination of cement and slag can improve the weathering resistance of the main body.

[0037] The weight component 100 is disc-shaped, which can distribute the force evenly. When the weights are stacked, the longitudinal tension can be evenly transmitted to each weight, avoiding cracking caused by local stress concentration. At the same time, it is not easy to bump the corners during handling and stacking, reducing the risk of damage to the main body. It also has good central symmetry.

[0038] The front side of the weight piece 100 has a through groove 110, wherein the groove 110 has a groove width of 20mm and a groove length of the radius of the disc of the weight piece 100. The groove 110 is used in conjunction with the base plate 710 and the weight rod 720.

[0039] The surface of the weight 100 is coated with a protective layer 500, which is made of epoxy resin. Epoxy resin is also applied to the inner walls of the groove 110, grip groove 200, and positioning hole 300 of the weight 100 to prevent corrosion of the hole walls caused by rainwater penetration.

[0040] Specifically, the epoxy resin uses a two-component formulation, with one component being epoxy adhesive and the other being a curing agent. The mixing ratio of epoxy adhesive and curing agent is 4:1.

[0041] In practical use, the two-component epoxy resin can prevent rainwater from seeping into the body of the weight 100, while resisting ultraviolet aging and chemical corrosion, preventing the body from rusting, weathering or peeling, and extending the service life of the composite weight.

[0042] In the actual process of spraying the protective layer 500, the first step is to cure the 100-ton weight at room temperature for 7 days after casting. Then, the surface is sanded with 120-grit sandpaper to remove scum and dust. Finally, the surface is wiped with alcohol to ensure that there is no oil.

[0043] Secondly, mix the epoxy adhesive and hardener in a 4:1 ratio, stir evenly for ≥5 minutes, and complete the spraying within 30 minutes to avoid premature curing of the epoxy resin;

[0044] Then, a high-pressure airless sprayer is used to control the coating thickness at 0.5-1mm. The number of sprays is adjusted, usually 2-3 coats.

[0045] Finally, after spraying, cure at room temperature for 24 hours to ensure that the protective layer is fully cured and forms a protective film that is tightly bonded to the substrate.

[0046] like Figures 1 to 4 As shown, the bottom of the weight piece 100 has two opposing grip grooves 200 symmetrically opened along the axis, which are used to provide "grip points" when the weight piece 100 is manually handled. The two grip grooves 200 are symmetrically distributed on the bottom edge of the weight piece 100 and are arranged opposite each other with the groove axis as the center line. The size range is 15-20mm in height, 25-35mm in depth and 80-100mm in width, preferably 18mm in height, 30mm in depth and 90mm in width.

[0047] Specifically, such as Figure 9 As shown, the top of the inner cavity of the grip groove 200 is beveled. The inner wall diameter of the grip groove 200 is 60mm, the distance from the bottom wall to the highest point of the top wall of the grip groove 200 is 40mm, and the distance from the bottom wall to the lowest point of the top wall of the grip groove 200 is 34mm.

[0048] At the same time, the weight component 100 is equipped with a reinforcing mechanism, which can evenly distribute the longitudinal tension and lateral impact force borne by the weight component 100, avoid local stress concentration, thereby significantly improving the overall anti-fracture performance of the weight component 100 and extending its service life.

[0049] like Figures 5 to 7 As shown, the reinforcing mechanism includes steel reinforcement members 600 arranged symmetrically on the top and bottom. The main body of the steel reinforcement member 600 is a round steel bar, and the inner surface of the steel reinforcement member 600 is connected with transverse bars 610.

[0050] Specifically, the 600 rebar reinforcement component is made by bending a single threaded steel bar into a circle with a diameter of 345mm, which is 15mm smaller than the diameter of the 100 weight component. The joint is connected by arc welding with a weld height of ≥10mm to ensure that the joint strength is not lower than that of the rebar body.

[0051] Two steel reinforcement members 600 are evenly distributed with vertical bars 620 between them. Among them, the surface of the horizontal bars 610 is connected with reinforcing bars, and the two horizontal bars 610 are fixedly connected by the reinforcing bars.

[0052] Specifically, the vertical bars 620 are evenly distributed between the upper and lower layers of steel reinforcement components 600, with adjacent steel reinforcement components 600 having an angle of 90°. The two ends of the vertical bars 620 are welded to the upper and lower layers of steel reinforcement components 600 to form a "double-layer three-dimensional frame" that is completely encased in the cement body to prevent the steel bars from being exposed and corroded.

[0053] The double-layer steel reinforcement 600 can disperse the longitudinal tension and lateral impact force borne by the weight 100 to the entire reinforcement mechanism, avoiding stress concentration that could cause the weight 100 to crack. For example, when the weight string is subjected to contact network vibration, the steel reinforcement 600 can absorb some of the vibration energy, reduce fatigue damage to the weight 100, and increase the fracture resistance life of the weight 100 from 10-15 years in the prior art to 15-20 years.

[0054] Before casting, the reinforcing mechanism of the weight 100 is treated with anti-rust measures, such as by applying a cement-based anti-rust agent. Then it is fixed in the center of the mold and positioned by the positioning pins inside the mold to ensure that the reinforcing mechanism is concentric with the body. During casting, a vibrator is used to compact the material to avoid voids between the reinforcing mechanism frame and the body of the weight 100, which would affect the bonding strength.

[0055] like Figure 1 ,and Figure 4 As shown, positioning holes 300 are provided through the left and right ends of the top of the weight piece 100. A protrusion 400 is fixedly connected to the top of the weight piece 100 and outside the positioning hole 300, while a recess 410 is provided through the bottom of the weight piece 100 and below the inner cavity of the positioning hole 300. The protrusion 400 and the recess 410 are interconnected.

[0056] The positioning hole 300 has a diameter of 20mm, while the protrusion 400 has a height of 5mm and a diameter of 35mm. The recess 410 has a diameter of 40mm and a depth of 8mm.

[0057] In actual use, the protrusions 400 around the positioning hole 300 are cast integrally with the weight 100 and pre-pressed using a mold. The top edge of the weight 100 is rounded with a radius of 2mm to avoid scratching the operator or damaging other parts during installation.

[0058] The inner wall of the recess 410 around the positioning hole 300 at the lower end of the weight piece 100 is smooth, forming a "concave-convex fit" with the protrusion 400 on the upper surface.

[0059] When the composite weights are stacked, the circular recesses 410 around the positioning holes 300 on the lower surface of the previous weight piece 100 precisely engage with the protrusions 400 around the positioning holes 300 on the upper surface of the next weight piece 100, forming a mechanical locking mechanism to limit the lateral displacement of adjacent weight pieces 100 and ensure the consistency of the weight string installation.

[0060] The inner side of the grip groove 200 has a diamond-shaped anti-slip texture to increase friction when handling manually. The grip groove 200 is U-shaped, which is ergonomic and makes it easier to apply force with both hands. The anti-slip texture prevents the grip from slipping and falling.

[0061] In the actual assembly process, such as Figures 10 to 12 As shown, multiple weight pieces 100 are stacked relative to each other. Each weight piece is rotated 180° with its adjacent weight piece before being placed, so that the grooves 110 are staggered. A screw piece 700 is provided through the surface of multiple positioning holes 300. The bottom diameter of the screw piece 700 is larger than the diameter of the positioning hole 300. A nut is threaded onto the top of the surface of the screw piece 700. In this way, the multiple weight pieces 100 are connected to each other to prevent the multiple weight pieces 100 from shifting during use.

[0062] Specifically, a weight rod 720 is vertically inserted into the groove 110 on multiple weight pieces 100, and the bottom of the weight rod 720 is connected to a base plate 710. The top of the base plate 710 contacts the bottom wall of the lowest weight piece 100, thus forming a complete weight string.

[0063] In summary, the weight component 100 uses high-strength cement as its base material, mixed with counterweight slag, iron powder, and iron sand. This not only meets the standard weight of 25kg per piece to fit existing weight string installation specifications, but also reduces the overall volume thanks to the high density of the iron powder and iron sand. Simultaneously, the combination of cement and slag enhances weather resistance. The disc-shaped design ensures even stress distribution, prevents damage during handling and stacking, and maintains good central symmetry. Its internal reinforced structure, with steel reinforcement 600, horizontal reinforcement 610, and vertical reinforcement 620 forming a double-layered three-dimensional frame, evenly distributes longitudinal tension and lateral impact force, preventing localized stress concentration. To prevent cracking; the protective layer 500 can prevent rainwater from seeping in and resist UV aging and chemical corrosion; during handling, personnel can grip and apply force through the symmetrical grip grooves 200 at the bottom; during installation and stacking, the protrusion 400 on the outside of the positioning hole 300 at the top of the weight piece 100 and the recess 410 at the bottom of the next piece are precisely fitted together without lateral displacement; finally, the screw piece 700 is used to pass through the positioning hole 300 and the nut is tightened to fix it, the weight rod 720 passes through the groove 110 and the bottom plate 710 supports the bottom weight piece 100, forming a complete weight string, which provides constant tension for the contact network and ensures its elasticity and predetermined height.

[0064] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A composite weight, characterized in that: Includes a weight (100), which is disc-shaped. The bottom of the weight (100) has two opposing grip grooves (200) symmetrically opened along the axis to provide "grip points" when the weight (100) is manually handled. At the same time, the weight (100) is provided with a reinforcing mechanism, which can evenly distribute the longitudinal tension and lateral impact force borne by the weight (100); Positioning holes (300) are provided at both ends of the top of the weight (100). A protrusion (400) is fixedly connected to the top of the weight (100) and outside the positioning hole (300), while a recess (410) is provided at the bottom of the weight (100) and below the inner cavity of the positioning hole (300).

2. The composite weight according to claim 1, characterized in that: The front side of the weight piece (100) is provided with a groove (110), wherein the groove (110) has a groove width of 20mm and a groove (110) length equal to the radius of the disc of the weight piece (100).

3. The composite weight according to claim 1, characterized in that: The surface of the weight (100) is coated with a protective layer (500), and the material of the protective layer (500) is epoxy resin.

4. The composite weight according to claim 3, characterized in that: The epoxy resin is formulated as a two-component compound, with one component being epoxy adhesive and the other being a curing agent. The mixing ratio of epoxy adhesive and curing agent is 4:

1.

5. The composite weight according to claim 1, characterized in that: The strengthening mechanism includes steel reinforcement members (600) arranged symmetrically on the upper and lower sides. The main body of the steel reinforcement member (600) is a round steel bar, and the inner surface of the steel reinforcement member (600) is connected with transverse bars (610).

6. The composite weight according to claim 5, characterized in that: Two steel reinforcement members (600) are evenly distributed with vertical bars (620) between them, wherein the surface of the horizontal bars (610) is connected with reinforcing bars, and the two horizontal bars (610) are fixedly connected by reinforcing bars.

7. The composite weight according to claim 1, characterized in that: The grip groove (200) has a height of 18mm, a depth of 30mm, and a width of 90mm.

8. The composite weight according to claim 1, characterized in that: The positioning hole (300) has a diameter of 20 mm, while the protrusion (400) has a height of 5 mm and a diameter of 35 mm. The recess (410) has a diameter of 40 mm and a depth of 8 mm.

9. The composite weight according to claim 8, characterized in that: The inner side of the grip groove (200) is provided with a diamond-shaped anti-slip pattern to increase friction during manual handling.

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