Split-phase insulator for overhead line system of electrified railway
By adopting composite materials and special structural design phase separation insulators, the problem of insufficient mechanical connection reliability and mechanical strength is solved, higher mechanical strength and stability are achieved, the risk of hard points and insulated slide breaks is reduced, and the operation stability and maintenance convenience of the equipment are improved.
Patent Information
- Application Number
- CN202422560422.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-10-23
AI Technical Summary
The existing electrified railway contact network phase separation insulators have shortcomings in mechanical connection reliability and mechanical strength, which can easily lead to problems such as hard point, arc combustion and insulated slide breaks, affecting equipment stability and railway driving order.
The composite material design includes a phase-separated insulator body with a fully symmetrical structure with rectangular rounded corners and a stainless steel connecting plate with a bolted connection with a stainless steel connecting single ear. It combines the epoxy fiber glass mandrel and an insulated wear-resistant waterproof layer, a fixing method of copper wire clips, copper wedges and cone sleeves to improve mechanical strength and stability.
It enhances the mechanical strength of the phase separation insulator and the operation stability of the equipment, reduces the risk of hard points and insulated slide breaks, and improves the maintenance convenience of the equipment.
Smart Images
Figure CN223116219U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of split-phase insulators, and particularly relates to split-phase insulators for the catenary of electrified railways. Background Art
[0002] The split-phase insulator is an important component of the catenary of electrified railways, which plays a role in mechanical connection and electrical insulation between contact suspensions of different phases. The split-phase insulator is generally set at the connection of two power supply arms, such as traction substations and section posts. Generally, a set of three split-phase insulators is installed to divide the catenary of electrified railways into several interphase units, so that the contact suspensions are insulated from each other. The split-phase insulator has to bear the contact wire line voltage and the impact voltage formed by the switching on and off of electric trains, and also has to bear the full tension of the catenary suspension. Therefore, it must have good mechanical and electrical properties, light weight and high strength.
[0003] In the prior art, parallel-connected joints are generally adopted for the joint clamps of split-phase insulators, and only the contact wire is clamped and fixed, so the mechanical connection reliability is poor; after some joints clamp and fix the contact wire, they bend the wire at a large angle and fix it with wire clips. Although the mechanical connection reliability is enhanced, the overall weight of the joint clamp is relatively large, and problems such as hard points and arcing are likely to occur when the pantograph passes through the joint of the split-phase insulator.
[0004] In the prior art, a single insulating element is generally adopted for the insulating slideway of the split-phase insulator. The insulating element is made of epoxy resin glass and coated with silicone oil on the surface. At the connection with the joint clamp, the end of the insulating material is perforated and connected to the joint clamp with bolts. Under the operating conditions of high speed, high voltage and high frequency vibration of the catenary, there are hidden dangers of insufficient mechanical strength at the perforation of the end of the insulating material and fracture of the insulating slideway. In the case of long-term contact operation of the pantograph, the insulating slideway made of epoxy resin glass in the prior art is prone to carbon deposition on the split-phase insulating slideway, and it is not easy to wipe off, which is likely to cause interphase short circuit, resulting in the tripping of the substation circuit breaker and affecting the railway operation order. The insulating slideway made of epoxy resin glass in the prior art is greatly restricted by the manufacturing process and material, and there are hidden dangers of insufficient mechanical strength and cannot bear the full tension of the catenary suspension, resulting in the catenary collapse fault. Summary of the Utility Model
[0005] The purpose of the present utility model is to solve the above problems, and a split-phase insulator for the catenary of electrified railways is proposed.
[0006] In order to achieve the above purpose, the present application adopts the following technical solutions:
[0007] The neutral section insulator for the catenary of electrified railways includes a neutral section insulator body, two neutral section insulator joint wire clips, four adjusting suspension ropes, and a neutral section insulator insulating slideway. Stainless steel connecting single ears are crimped and fixed at both ends of the neutral section insulator insulating slideway, and the neutral section insulator body is bolted to the stainless steel connecting single ears through a stainless steel connecting plate.
[0008] Preferably, the neutral section insulator body adopts a rectangular inverted rounded corner fully symmetric structure.
[0009] Preferably, the middle part of the neutral section insulator insulating slideway is an epoxy glass fiber core rod, and an insulating wear-resistant waterproof layer is arranged outside the epoxy glass fiber core rod.
[0010] Preferably, the contact wire connection end of the neutral section insulator joint wire clip is fixedly connected through a copper wire clip, and the upper end of the contact wire connection end is fixed through a copper wedge and a cone sleeve matching the contact wire.
[0011] Preferably, arc guiding angles and adjusting suspension rope connection ends are arranged at both ends of the stainless steel connecting plate, and the lower parts of the four adjusting suspension ropes are fixed to the adjusting suspension rope connection ends through bolts.
[0012] Preferably, the neutral section insulator joint wire clip is fixedly connected by a cone sleeve type joint wire clip.
[0013] Compared with the prior art, the present application provides a neutral section insulator for the catenary of electrified railways, which has the following beneficial effects:
[0014] 1. For the neutral section insulator for the catenary of electrified railways, the neutral section insulator insulating slideway adopts a rectangular inverted rounded corner fully symmetric structure. Stainless steel connecting single ears are crimped and fixed at both ends of the neutral section insulator insulating slideway. The neutral section insulator body is composed of two materials in combination. The neutral section insulator body is bolted to the stainless steel connecting single ears through a stainless steel connecting plate. Using composite materials and a crimping structure greatly improves the overall mechanical strength of the neutral section insulation of the catenary. The rectangular inverted rounded corner fully symmetric structure can be flipped and replaced for installation, which is convenient for the maintenance of the neutral section insulator.
[0015] 2. For the neutral section insulator for the catenary of electrified railways, the contact wire connection end of the joint wire clip is fixedly connected by a copper wire clip. The upper end of the contact wire bent at 90 degrees is fixed through a copper wedge and a cone sleeve matching the contact wire. The neutral section insulator body is bolted to the stainless steel connecting single ears through a stainless steel connecting plate, which improves the mechanical strength of the wire connection and the stability of the equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic structural diagram of the neutral section insulator for the catenary of electrified railways proposed by the present application;
[0017] Figure 2 is Figure 1 The front view of the main body of the neutral section insulator;
[0018] Figure 3 is Figure 1 The enlarged view of the main body of the neutral section insulator;
[0019] Figure 4 is Figure 2 The top view of the insulating slideway of the neutral section insulator;
[0020] Figure 5 is Figure 2 The sectional view of the insulating slideway of the neutral section insulator;
[0021] Figure 6 is Figure 2 The structural schematic diagram of the joint clamp of the neutral section insulator.
[0022] In the figure: 1. The main body of the neutral section insulator; 2. The joint clamp of the neutral section insulator; 3. The adjusting sling; 4. The insulating slideway of the neutral section insulator; 5. The stainless steel connecting single ear; 6. The epoxy glass fiber core rod; 7. The insulating wear-resistant waterproof layer; 8. The copper wire clamp; 9. The copper wedge and taper sleeve; 10. The stainless steel connecting plate; 11. The arc guide angle; 12. The connecting end of the adjusting sling. Specific embodiments
[0023] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.
[0024] Refer to Figures 1-6 , the neutral section insulator for the catenary of electrified railways includes the main body 1 of the neutral section insulator, two joint clamps 2 of the neutral section insulator, four adjusting slings 3 and the insulating slideway 4 of the neutral section insulator. The two ends of the insulating slideway 4 of the neutral section insulator are crimped and fixed with stainless steel connecting single ears 5, and the main body 1 of the neutral section insulator is bolted to the stainless steel connecting single ear 5 through a stainless steel connecting plate 10.
[0025] The main body 1 of the neutral section insulator adopts a rectangular inverted rounded corner fully symmetric structure.
[0026] The middle part of the insulating slideway 4 of the neutral section insulator is provided with an epoxy glass fiber core rod 6, and an insulating wear-resistant waterproof layer 7 is arranged outside the epoxy glass fiber core rod 6.
[0027] The contact wire connection end of the joint clamp 2 of the neutral section insulator is connected and fixed through a copper wire clamp 8, and the upper end of the contact wire connection end is fixed through a copper wedge and taper sleeve 9 matching the contact wire.
[0028] Both ends of the stainless steel connecting plate 10 are provided with arc guiding angles 11 and adjusting sling connection ends 12. The lower parts of the four adjusting slings 3 are fixed to the adjusting sling connection ends 12 by bolts.
[0029] The split-phase insulator joint clamp 2 is fixedly connected by a tapered sleeve joint clamp.
[0030] The operating principle of the present utility model is described as follows:
[0031] When this application is used, first confirm the center of the split-phase insulator body 1 and install two split-phase insulator joint clamps 2. Draw lines to confirm the installation positions of the split-phase insulator joint clamps 2. When the contact wire is tightened by a wire tightener until it is slightly slack, embed the tooth tips of the copper wire clamp 8 into the dovetail groove of the copper alloy contact wire. The length of the clamped contact wire part is equal to the length of the tooth part of the wire clamp (90 mm). The tail of the contact wire clamped by the copper wire clamp 8 should leave at least 140 mm, and after bending upward by 90°, it should be closely attached to the arc surface of the wire clamp (the bending can be done in advance). Place the copper wedge and tapered sleeve 9 on the upper part of the stainless steel connecting plate 10. Pass the end of the contact wire through the copper wedge and tapered sleeve 9 in sequence. Tighten the three M12 straight bolts at the copper wire clamp 8. When tightening, tighten alternately in the order of first the middle and then the two sides. The tightening torque is 56 N·m. Then tighten the locknut. When tightening the locknut, hold one side of the hexagonal head of the bolt to prevent the bolt from loosening when tightening the locknut. Hammer the copper wedge in the tapered sleeve so that the large end of the wedge is about 5 mm away from the end face of the tapered sleeve. During installation, the grooved part of the wedge is staggered from the grooved part of the wire. Suspend the split-phase insulator body 1 on the catenary with four adjusting slings 3. The adjustable suspension strings are vertically installed in a "V" shape. Adjust the height of the adjustable suspension strings to ensure that the bottom plane of the split-phase insulator slide plate is parallel to the rail surface. The two groups of suspension strings should be operated simultaneously, and the force should be uniform and appropriate.
[0032] The above is only the preferred specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application, according to the technical solution and application concept of this application, makes equivalent substitutions or changes, and should be covered within the protection scope of this application.
Claims
1. The phase-separating insulator for the catenary of electrified railways comprises a phase-separating insulator body (1), two phase-separating insulator joint wire clips (2), four adjusting suspension ropes (3) and a phase-separating insulator insulating slideway (4), and is characterized in that, Both ends of the insulating slideway (4) of the split-phase insulator are crimped and fixed with stainless steel connecting single lugs (5), and the split-phase insulator body (1) is bolted to the stainless steel connecting single lugs (5) through a stainless steel connecting plate (10).
2. The neutral section insulator for electrified railway catenary according to claim 1, wherein The split-phase insulator body (1) adopts a rectangular structure with rounded corners and full symmetry.
3. The phase separator for electrified railway catenary according to claim 1, characterized in that, The middle part of the insulating slideway (4) of the split-phase insulator is provided with an epoxy glass fiber core rod (6), and an insulating wear-resistant waterproof layer (7) is arranged outside the epoxy glass fiber core rod (6).
4. The phase-separating insulator for an electrified railway catenary according to claim 1, wherein The contact wire connection end of the split-phase insulator joint clamp (2) is connected and fixed through a copper wire clamp (8), and the upper end of the contact wire connection end is fixed through a copper wedge and a cone sleeve (9) matching the contact wire.
5. The neutral section insulator for the catenary of electrified railways according to claim 1, characterized in that, Both ends of the stainless steel connecting plate (10) are provided with arc guiding angles (11) and adjusting sling connection ends (12), and the lower parts of the four adjusting slings (3) are fixed to the adjusting sling connection ends (12) through bolts.
6. The neutral section insulator for catenary of electrified railway according to claim 1, wherein The split-phase insulator joint clamp (2) is fixedly connected by a cone sleeve type joint clamp.