A flexible integral suspension string

Abstract

This invention provides an elastic integral dropper, comprising an upper dropper plate, a left upper dropper plate clamp, a right upper dropper plate clamp, bolts, nuts, a casing, side plates, partitions, a spring seat assembly, a main shaft, a lower dropper plate, a left lower dropper plate clamp, and a right lower dropper plate clamp. The spring seat assembly is composed of a spiral spring, etc. The upper dropper plate is fixedly connected to the catenary cable via the left upper dropper plate clamp and the right upper dropper plate clamp. The upper end of the lower dropper plate drives the spiral spring to tighten and retract via the main shaft. The lower end of the lower dropper plate is connected to the contact wire via the left lower dropper plate clamp and the right lower dropper plate clamp, so that the contact wire generates a certain elastic movement, effectively controlling the defect of large cross-movement of the catenary cable and the contact wire, and avoiding the occurrence of center anchor offset, damage, and catenary cable and contact wire galloping.

Description

Technical Field

[0001] This invention relates to the field of power supply technology for overhead contact lines in electrified railways. In particular, it relates to a flexible integral dropper used in catenary wires and contact wires. Background Technology

[0002] The railway industry standard TB / T207.7-2010 "Components of Electrified Railway Contact System - Part 7: Integral Droppers and Dropper Clamps" specifies five structural forms of integral droppers: Type A, Type B, Type C, Type D, and Type E. The two ends of the integral dropper are respectively installed on the catenary wire and the contact wire of the contact system to adjust the height between the contact wire and the rail surface and ensure the stability between the pantograph and the contact system.

[0003] The five structural forms of integral droppers specified in the aforementioned industry standards are flexible integral droppers and do not have the function of automatically adjusting the contact wire torque.

[0004] The China Patent Database has published an international application document for "Contact Wire Suspension Clamp, Catenary Wire Suspension Clamp, and Boltless Integrated Suspension Ring", with international publication number WO2023 / 040604 A1, international publication date: March 23, 2023, international application number PCT / CN2022 / 114238, inventors Ren Xingtang and An Jinwang. The feature is: a contact wire dropper clamp (100), a catenary dropper clamp (200), and a boltless integral dropper (1000) with a ring. The boltless integral dropper (1000) with a ring includes a dropper wire (300) and a contact wire dropper clamp (100) and a catenary dropper clamp (200) connected to its two ends. The contact wire dropper clamp (100) includes a lower ring (10), and the catenary dropper clamp (200) includes an upper ring (20). The lower ring (10) is connected to the lower heart-shaped protective ring (35) of the dropper wire (200), and the upper ring (20) is connected to the upper heart-shaped protective ring (35) of the dropper wire (300).

[0005] The integral dropper in this international application and the five structural forms specified in the aforementioned railway industry standards are of the same type of structure. It is also a flexible integral dropper and does not have the function of automatically adjusting the contact wire torque.

[0006] A utility model patent document for "boltless wire clamp and boltless integral suspension string" has been published in the Chinese Patent Database. The application number is 202222847416.X, the authorization announcement number is CN 218640707 U, the application date is October 27, 2022, the authorization announcement date is March 17, 2023, and the patentee is China Railway Design Group Co., Ltd. and Baoji Baodeli Electrical Equipment Co., Ltd. The features are: a boltless wire clamp and a boltless integral dropper, the boltless wire clamp including a secondary clamp plate and a main clamp plate; the secondary and main clamp plates have an inverted "L" shaped stepped structure, with an inclined surface on the upper part of the inner side and a clamping opening on the lower part to match the contact line or catenary; the outer side of the secondary clamp plate has a groove along the line direction; the main clamp plate has a boss along the line direction, the secondary and main clamp plates are arranged opposite each other, and the boss is inserted into the groove, so that the inclined surfaces of the secondary and main clamp plates fit together and press against each other, the secondary clamp plate rotates counterclockwise around the boss through the groove, and the main clamp plate rotates clockwise around the groove through the boss, thereby clamping the contact line or catenary through the clamping opening; the boltless wire clamp of this utility model adopts a mortise and tenon connection structure to overcome the shortcomings of the prior art.

[0007] This utility model patent, along with the aforementioned railway industry standards and international applications, belongs to the same type of integral dropper, which is also a flexible integral dropper and does not have the function of automatically adjusting the contact wire torque.

[0008] A patent application for an automatic adjustment and balancing device for a dropper has been published in the Chinese Patent Database. Application No.: 202010070506.5, Publication No.: CN111114393 A, Application Date: January 21, 2020, Publication Date: May 8, 2020, Patentee: Zhang Rongjian. The invention relates to the field of electrified railway equipment technology and discloses an automatic adjustment and balancing device for a dropper, comprising a cavity with serrated inner surface. A telescopic rod is slidably fitted inside the cavity. Grooves are formed at both ends of the top of the telescopic rod. A limiting block is rotatably connected to the inside of the groove via a spindle. A first spring is fixedly connected between the limiting block and the inner wall of the groove. A first connecting rod is rotatably connected to the bottom end of the limiting block via a connecting block. The other end of the second connecting rod is rotatably connected to both sides of a sliding shaft via a connecting block. This automatic adjustment and balancing device for the dropper wire utilizes the greater thrust from the pantograph at the lower part of the contact wire and the telescopic rod that can be raised and positioned to achieve automatic adjustment and positioning of the dropper wire. Through the action of the buffer sleeve, it reduces the vibration force on the dropper wire caused by the high-speed passage of the pantograph and improves the service life of the dropper wire.

[0009] Due to structural limitations, the application of this invention patent in practical engineering has been somewhat restricted. Summary of the Invention

[0010] The present invention aims to overcome the shortcomings of the above-mentioned integral dropper technologies and provide an elastic integral dropper with a rigid structure. This allows the catenary and contact wire of the contact network to maintain tension and also has the function of automatically adjusting the torque of the contact wire, ensuring that the contact wire always remains vertical and in a consistent position, and limiting large deviations in the catenary and contact wire.

[0011] To achieve the above objectives, the elastic integral suspension 100 comprises an upper suspension plate 1, a left upper suspension plate clamp 2, a right upper suspension plate clamp 2', a bolt 3, a nut 4, a cylinder 5, a side plate 6, a partition 7, a spring seat assembly 8, a main shaft 9, a lower suspension plate 10, a left lower suspension plate clamp 11, and a left lower suspension plate clamp 11'.

[0012] Furthermore, the elastic integral suspension cable 100 and the load-bearing cable 200 are fixedly connected by the upper suspension plate 1, the upper left suspension plate clamps 2 and the upper right suspension plate clamps 2' on both sides, and the bolts 3 and nuts 4.

[0013] Furthermore, the contact wire 300 of the elastic integral suspension string 100 is fixedly connected by the lower suspension plate 10, the left lower suspension plate clamps 11 and 11' on both sides, and the bolts 3 and nuts 4. Attached Figure Description

[0014] The invention will now be further described with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the structure of an elastic integral suspension string 100 according to the present invention.

[0016] Figure 2 This is a schematic diagram of an elastic integral suspension string 100 of the present invention, which swings at an angle of 15° to the left (in the direction of the train line).

[0017] Figure 3 This is a schematic diagram of the structure of the upper left hanging plate clamp 2 and the upper left hanging plate clamp 2′ in the elastic integral suspension string 100 of the present invention.

[0018] Figure 4 This is a cross-sectional view of the cylinder 5 in an elastic integral suspension string 100 according to the present invention.

[0019] Figure 5 This is a cross-sectional view of the spring seat assembly 8 in an elastic integral suspension string 100 according to the present invention.

[0020] Figure 6 This is a schematic diagram of the main shaft 9 in an elastic integral suspension string 100 of the present invention.

[0021] Figure 7 This is a schematic diagram of the structure of the lower suspension plate 10 in an elastic integral suspension string 100 of the present invention.

[0022] Figure 8 This is a schematic diagram of the structure of the lower left hanging plate clamp 11 and the lower left hanging plate clamp 11' in the elastic integral suspension wire 100 of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are for illustrative purposes only and are not intended to limit the invention. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention.

[0024] The terms "include" and "contain" used in this article are open-ended, meaning they include but are not limited to.

[0025] The use of “and” and / or as used herein includes any or all of the things described.

[0026] like Figure 1 The elastic integral suspension cable 100 comprises an upper suspension plate 1, a left upper suspension plate clamp 2, a right upper suspension plate clamp 2', a bolt 3, a nut 4, a cylinder 5, a side plate 6, a partition 7, a spring seat assembly 8, a main shaft 9, a lower suspension plate 10, a left lower suspension plate clamp 11, and a right lower suspension plate clamp 11'.

[0027] like Figure 1 The elastic integral suspension cable 100 and the load-bearing cable 200 are fixedly connected by an upper suspension plate 1, a left upper suspension plate clamp 2, a right upper suspension plate clamp 2', and bolts 3 and nuts 4.

[0028] like Figure 1 The elastic integral suspension wire 100 has a contact wire 300 fixedly connected by a lower suspension plate 10, a lower left suspension plate clamp 11, a lower right suspension plate clamp 11', and bolts 3 and nuts 4.

[0029] like Figure 1 The elastic integral suspension 100 has an upper suspension plate 1 connected by double rows of bolts 3 and nuts 4 to form a fixed structure, and a lower suspension plate 10 connected by double rows of bolts 3 and nuts 4 to form a fixed structure. The lower suspension plate 10 and the main shaft 9 form a moving structure as the spiral spring 82 coils and retracts.

[0030] like Figure 1 The aforementioned elastic integral suspension string 100 is composed of an upper suspension plate 1, a cylinder 5, a side plate 6, a partition plate 7, and a spring seat assembly 8 welded together to form an integral structure.

[0031] like Figure 1The elastic integral suspension cable 100 has a toothed structure at the upper end of the upper suspension plate 1, and toothed structures at the lower ends of the upper left suspension plate clamp 2 and the upper right suspension plate clamp 2'. The three are clamped together with bolts 3 and nuts 4 to tighten the load-bearing cable 200, thereby increasing the friction coefficient with the load-bearing cable 200 and thus increasing the sliding load with the load-bearing cable 200.

[0032] like Figure 1 The elastic integral suspension 100 has a semi-circular toothed structure at the lower end of the lower suspension plate 10, and semi-circular toothed structures at the lower ends of the left lower suspension plate clamp 11 and the right lower suspension plate clamp 11'. The three are clamped together with bolts 3 and nuts 4 to tighten the contact line 300, thereby increasing the coefficient of friction with the contact line 300 and thus increasing the sliding load with the contact line 300.

[0033] like Figure 2 The schematic diagram of the elastic integral suspension 100 swinging 15° to the left (train line direction) forms an upward Δ+Z variable, and the swing angle is not limited to this angle.

[0034] like Figure 3 The upper left hanging clamp 2 (left in the figure) and the upper right hanging clamp 2 ′ (Right in the figure) The clamp has a toothed structure that perfectly matches the cross-section of the load-bearing cable 200. It forms a clamping force after being tightened together with the upper hanging plate 1, bolt 3, and nut 4.

[0035] like Figure 4 The cylindrical body 5 has an arc groove along its periphery. One end 5-1 of the arc groove restricts the lower hanging plate 10 to the initial position of 0°, and the other end 5-2 restricts the lower hanging plate 10 to a maximum swing angle of 25° to the left (train line direction). The included angle of the arc groove is 0 to 25°.

[0036] like Figure 5 The spring seat assembly 8 comprises a side plate seat 8-1, a spiral spring 8-2, a main shaft sleeve 8-3, a cover plate 8-4, and rivets 8-5. The outer hook 8-6 of the spiral spring 8-2 is fixedly connected to the notch 8-8 of the side plate seat 8-1, and the inner hook 8-7 of the spiral spring 8-2 is fixedly connected to the notch 8-9 of the main shaft sleeve 8-3. The main shaft sleeve 8-3 is fixed at the center position of the spiral spring 8-2.

[0037] like Figure 5 The spiral spring 8-2 is a contact-type planar spiral spring, or it can be a non-contact planar spiral spring; there can be one spiral spring 8-2, or more than one.

[0038] like Figure 6The main shaft 9 is provided with a semi-circular notch and a fixed connection to the main shaft sleeve 8-3. It is provided with an external spline and a fixed connection to the spline groove at the upper end of the lower hanging plate 10. It is provided with an internal threaded hole for adjusting the initial load of the spiral spring 8-2.

[0039] like Figure 7 The lower hanging plate 10 has an internal spline structure at its upper end and is fixedly connected to the external spline of the main shaft 9, and its lower end is fixedly connected to the lower left hanging plate clamp 11 and the lower right hanging plate clamp 11'.

[0040] like Figure 7 The lower hanging plate 10 has a cuboid structure and can have process holes, which can be round holes, square holes, and / or other shapes.

[0041] like Figure 7 The lower hanging plate 10 can be a structure where the installation height cannot be adjusted, or it can be a structure where the installation height can be adjusted.

[0042] like Figure 7 The lower suspension plate 10 can be a rigid structure or a flexible copper alloy stranded wire.

[0043] like Figure 8 The clamping jaws of the lower left hanging plate clamp 11 (left figure) and the lower right hanging plate clamp 11' (right figure) are semi-circular arc structures, which perfectly match the cross-section of the contact line 300. They form a clamping force after being tightened together with the lower hanging plate 10, bolt 3, and nut 4.

[0044] Compared with existing integral dropper products, the present invention has the following advantages.

[0045] The existing high-speed railway (including medium and low speed electrified railway) catenary widely uses the integral dropper wire technology, which is a structure with dropper wires. It is a flexible suspension method. The current product technology and invention patents (utility model patents) are just minor modifications to the contact wire dropper wire clamps and catenary wire dropper wire clamps. The technology content is low, the technological breakthroughs are small, the technological achievements are not "bright", and there is no substantial scientific and technological progress.

[0046] This invention relates to an elastic integral dropper 100, which belongs to a rigid structure elastic integral dropper technology. It effectively controls the defect of large cross-movement of the catenary and contact wire, and avoids the occurrence of center anchor offset, damage, and catenary and contact wire galloping.

[0047] The present invention provides an elastic integral suspension string 100, which has a simple structure, reasonable process, and easy installation, and greatly avoids many defects of existing suspension string technology using casting process.

[0048] The present invention provides an elastic integral dropper 100, which further ensures the stability of the overhead contact line structure and improves the current collection quality of the pantograph; it also reduces the sag of the contact wire, making the elasticity more uniform.

[0049] This invention provides an elastic integral dropper 100 that fully meets the requirements of industry standards TB / T2073-2020 "Technical Requirements for Contact Wire Components of Electrified Railways", TB / T2074-2020 "Test Methods for Contact Wire Components of Electrified Railways", and TJ / GD034-2020 "Provisional Technical Conditions for Inspection of Integral Droppers of Electrified Railway Contact Wires", with a tensile strength ≥17.5kN and a fatigue test life of 7 million cycles.

[0050] It should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A resilient unitary fiddleback, characterised in that, The utility model relates to a kind of contact line suspension device, including: Upper hanger plate, left upper hanger plate clamp, right upper hanger plate clamp, bolt, nut, cylinder, side plate, partition, spring seat assembly, main shaft, lower hanger plate, left lower hanger plate clamp, right lower hanger plate clamp;Force bearing cable is connected with upper hanger plate by left upper hanger plate clamp, right upper hanger plate clamp, bolt, nut, contact line is connected with lower hanger plate by left lower hanger plate clamp, right lower hanger plate clamp, bolt, nut; Arc slot is set along the periphery of cylinder, one end of arc slot limits lower hanger plate in initial position, the other end of arc slot limits lower hanger plate swing in train line direction, maximum swing angle is 25 °; The spring seat assembly includes side plate seat, volute spring, main shaft sleeve, cover plate, rivet, the outer hook of volute spring is fixedly connected with the notch groove of side plate seat, the inner hook of volute spring is fixedly connected with the notch groove of main shaft sleeve;The main shaft sleeve is fixed in the central position of volute spring; Half-circle notch is provided on the main shaft and fixedly connected with main shaft sleeve, external spline is provided on the main shaft and fixedly connected with the spline groove of lower hanger plate upper end, internal screw hole is provided on the main shaft to adjust the initial load of volute spring.

2. The unitary elastic lacing chord of claim 1, wherein, Volute spring is contact type plane volute spring or non-contact type plane volute spring;Volute spring is set to one or more.

3. The elastomeric monolithic frit as defined in claim 1, wherein, Lower hanger plate is structure of unadjustable installation height or structure of adjustable installation height;Lower hanger plate is cuboid structure, and is provided with round hole or square hole.

4. The elastomeric monolithic frit as defined in claim 1, wherein, The shape of the clamping opening of left upper hanger plate clamp and right upper hanger plate clamp is tooth structure.

5. The elastomeric monolithic frit as defined in claim 1, wherein, The shape of the clamping opening of left lower hanger plate clamp and right lower hanger plate clamp is semicircular arc structure.

6. The elastomeric monolithic frit as defined in claim 1, wherein, Lower hanger plate is rigid structure or flexible copper alloy wire.

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