Electrified railway overhead line system dropper protection device
By installing protective devices on the droppers to divert and absorb vibration energy, the problem of wire breakage/detachment at points A and B was solved, thus achieving a long service life for the droppers and safe operation of the electric locomotive.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2026-04-07
AI Technical Summary
Existing technologies have failed to effectively reduce the probability of wire breakage/detachment of the overhead contact line droppers at points A and B by diverting vibration waves, thus affecting the operational safety of electric locomotives and the service life of the droppers.
The protective device, made of one-piece molded or malleable wire, reduces stress concentration of the dropper at points A and B by diverting and partially absorbing vibration energy. It includes the crimped tube connection, transition section and main wire connection section, and uses the combination design of plug and socket to achieve multi-level vibration diversion.
It significantly reduces the probability of wire breakage/detachment at points A and B of the dropper, extends the service life of the dropper, ensures the safe operation of electric locomotives, and reduces maintenance costs.
Smart Images
Figure CN224090066U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electrified railway technical field especially a kind of catenary dropper protection device of electrified railway. BACKGROUND
[0002] The catenary in electrified railway is the conductor system for power supply of electric locomotive, including the messenger wire and contact wire arranged along the direction of locomotive travel, and the dropper connected between the messenger wire and the contact wire. Since railway is a vibration environment, vibration is generated at the place where each train (locomotive) travels through, and it is not uncommon that the dropper wire of electrified railway catenary is broken or even broken off due to vibration.
[0003] The structure of the dropper is shown in Figure 6 , which includes the dropper wire 1, the compression joint pipe 2, the messenger wire dropper wire clamp 3 and the contact wire dropper wire clamp 4. The dropper wire 1 is bent to form the heart-shaped section 11 at the upper end and the lower end, respectively. The two sections of the dropper wire 1 are folded together by the compression joint pipe 2 at the upper and lower heart-shaped sections 11, respectively. The main body wire 12 of the dropper wire 1 is between the two compression joint pipes 2. The inner side of the two heart-shaped sections 11 of the dropper wire 1 is respectively covered with the heart-shaped protective ring 13. The messenger wire dropper wire clamp 3 and the contact wire dropper wire clamp 4 are respectively connected in the heart-shaped protective ring 13 at the upper and lower ends of the dropper wire 1. The messenger wire dropper wire clamp 3 is connected to the messenger wire 100, and the contact wire dropper wire clamp is connected to the contact wire 200, so that the dropper wire 1 is arranged vertically.
[0004] The functions of the dropper are as follows: 1. maintaining the straightness of the contact wire: by adjusting the length of the dropper, the horizontal straightness of the contact wire is ensured, the sagging or deformation caused by gravity or temperature change is avoided, and the smooth sliding of the pantograph (located on the top of the locomotive) is ensured; 2. dispersing the mechanical load of the contact wire: the force applied by the pantograph is transmitted to the messenger wire through the dropper, the local stress of the contact wire is reduced, and the excessive wear or breakage is prevented; 3. absorbing vibration and impact: the dropper can buffer the vibration generated during train operation, reduce the mechanical impact of the contact wire and the pantograph, and prolong the service life of the pantograph and the contact wire; 4. controlling the suspension height of the contact wire: the dropper is used to fix the vertical distance between the contact wire and the track, to meet the power supply demand of trains of different speed grades (such as higher precision required for high-speed railway).
[0005] During the locomotive travel, the vibration is transmitted to the contact wire and the dropper in turn through the pantograph. According to the maintenance condition and stress analysis, there are 9 potential breaking points of the dropper, which are shown in Figure 6The broken wires are mainly concentrated at A-B, that is, the junction of the main body of the dropper wire and the lower end of the upper compression pipe, and the junction of the main body of the dropper wire and the upper end of the lower compression pipe, and the broken wires at A-B will cause the dropper wire to prolapse, directly affecting the safe operation of the electric locomotive.
[0006] Therefore, it is necessary to reduce the probability of broken wires at A-B through certain protection means to prolong the service life of the dropper wire and ensure the safe operation of the electric locomotive.
[0007] Currently, the existing technology usually improves the material, cross-sectional area and structure of the dropper wire to enhance the anti-vibration damage capacity of the dropper wire to solve the problem of broken wires at A-B. Practical new type content
[0008] The utility model discloses an electric railway overhead line system dropper wire protection device which reduces the vibration of the dropper wire at A-B, reduces the probability of broken wires, prolongs the service life of the dropper wire and ensures the safe operation of the electric locomotive.
[0009] The utility model discloses a kind of electric railway overhead line system dropper wire protection devices, it is applied to dropper wire;Dropper wire includes dropper wire, compression pipe, load cable dropper wire clamp and contact wire dropper wire clamp;Dropper wire is bent to form heart segment at upper and lower ends, and dropper wire is in two heart segments at upper and lower ends respectively by compression pipe two segment line body parallel collection, dropper wire is main body line between two compression pipes, and the inside of two heart segments of dropper wire is respectively pasted with heart ring;Load cable dropper wire clamp and contact wire dropper wire clamp are respectively connected in the heart ring of the upper and lower ends of dropper wire.
[0010] It includes protection device;Protection device includes compression pipe connecting portion, transition portion and main body line connecting portion connected in sequence from one end to another end;Compression pipe connecting portion is fastenedly connected on any compression pipe, and main body line connecting portion is fastenedly connected on the main body line of dropper wire.
[0011] The further technical scheme of the utility model discloses: the protection device is integrally formed of elastic material, the crimping pipe connecting part and the main body wire connecting part are sleeve-shaped with two open ends respectively, the crimping pipe connecting part is provided with a pipe passing hole, the main body wire connecting part is provided with a wire passing hole, the crimping pipe connecting part is fixedly sleeved on the outer wall of the crimping pipe through the pipe passing hole, the main body wire connecting part is fixedly sleeved on the main body wire of the hanging line through the wire passing hole, and the transition part has no connection relationship with the main body wire of the hanging line and the crimping pipe.
[0012] The further technical scheme of the utility model discloses: the protection device is integrally formed of elastic material, the crimping pipe connecting part and the main body wire connecting part are sleeve-shaped with two open ends respectively, the crimping pipe connecting part is provided with a pipe passing hole, the main body wire connecting part is provided with a wire passing hole, the crimping pipe connecting part is fixedly sleeved on the outer wall of the crimping pipe through the pipe passing hole, the main body wire connecting part is fixedly sleeved on the main body wire of the hanging line through the wire passing hole, and the transition part has no connection relationship with the main body wire of the hanging line and the crimping pipe.
[0013] The further technical scheme of the utility model discloses: the protection device is integrally formed of elastic material, the crimping pipe connecting part and the main body wire connecting part are sleeve-shaped with two open ends respectively, the crimping pipe connecting part is provided with a pipe passing hole, the main body wire connecting part is provided with a wire passing hole, the crimping pipe connecting part is fixedly sleeved on the outer wall of the crimping pipe through the pipe passing hole, the main body wire connecting part is fixedly sleeved on the main body wire of the hanging line through the wire passing hole, and the transition part has no connection relationship with the main body wire of the hanging line and the crimping pipe.
[0014] The further technical scheme of the utility model discloses: the protection device is integrally formed of elastic material, the crimping pipe connecting part and the main body wire connecting part are sleeve-shaped with two open ends respectively, the crimping pipe connecting part is provided with a pipe passing hole, the main body wire connecting part is provided with a wire passing hole, the crimping pipe connecting part is fixedly sleeved on the outer wall of the crimping pipe through the pipe passing hole, the main body wire connecting part is fixedly sleeved on the main body wire of the hanging line through the wire passing hole, and the transition part has no connection relationship with the main body wire of the hanging line and the crimping pipe.
[0015] The further technical scheme of the utility model discloses: the whole protection device is a plastic wire, and the plastic wire has the characteristics of bending and setting simultaneously; one end of the plastic wire is spirally coiled on the outer wall of the crimping pipe, forming a crimping pipe connecting part, and the other end of the plastic wire is spirally coiled on the main line of the dropper, forming a main line connecting part, and the middle part of the plastic wire is a transition part, and the transition part has no connection relationship with the main line of the dropper and the crimping pipe.
[0016] Compared with the prior art, the utility model has the following advantages:
[0017] 1. The protection device effectively shunts and partially absorbs the vibration energy transmitted to the A-B position of the dropper during locomotive operation, significantly reduces the stress concentration of the two parts, significantly reduces the probability of dropper wire breakage / disconnection, and ensures the stability of the catenary system.
[0018] 2. Prolong the service life of the dropper and reduce the maintenance cost: the protection device shunts and partially absorbs the vibration, reduces the fatigue damage of the dropper wire at the crimping pipe connection, prolongs the service life of the dropper as a whole, and reduces the operation and maintenance cost caused by frequent replacement.
[0019] 3. Multi-stage vibration shunting to improve the anti-vibration performance of the system: by installing a single or double protection device, the vibration wave is absorbed and shunted in stages, and the vibration intensity is weakened layer by layer, especially when the double devices work together, the energy can be shunted twice, further improving the ability to resist vibration waves.
[0020] 4. Flexible installation and strong adaptability: split design (male and female) or plastic wire structure allows the protection device to be quickly assembled or wound and fixed, adapts to different working conditions, and does not need to disassemble the original dropper parts, simplifying the installation process.
[0021] 5. If the dropper wire breaks at A-B, the protection device still traps the dropper wire, preventing the dropper wire from sagging, ensuring the safe operation of electric locomotives.
[0022] The utility model will be further described in combination with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is the use state diagram of the protection device in example 1;
[0024] Figure 2 It is the structure schematic drawing of the protection device in example 1 under the first visual angle;
[0025] Figure 3 It is the structure schematic drawing of the protection device in example 1 under the second visual angle;
[0026] Figure 4This is a schematic diagram of the protective device in Example 1 from a third perspective;
[0027] Figure 5 This is a diagram showing the usage status of the protection device in Example 2;
[0028] Figure 6 This is a schematic diagram of the suspension cable used in this utility model;
[0029] Figure 7 This is a schematic diagram of the vibration wave diversion in this utility model.
[0030] Legend: 1. Dropper wire; 11. Heart-shaped section; 12. Main wire; 13. Heart-shaped protective ring; 2. Crimping pipe; 3. Catenary dropper wire clamp; 4. Contact wire dropper wire clamp; 51. Crimping pipe connection; 511. Pipe hole; 52. Transition section; 53. Main wire connection; 531. Wire hole; 54. Male part; 541. Insert post A; 542. Insert post B; 55. Female part; 100. Catenary wire; 200. Detailed Implementation
[0031] Example 1
[0032] like Figures 1-4 As shown, this is a protective device for the dropper wire of an electrified railway contact network, applied to the dropper wire. The dropper wire includes a dropper wire 1, a crimping tube 2, a catenary dropper wire clamp 3, and a contact wire dropper wire clamp 4. The dropper wire 1 is bent at both its upper and lower ends to form heart-shaped segments 11. The two heart-shaped segments 11 of the dropper wire 1 are connected side-by-side by the crimping tube 2. The dropper wire 1 forms the main wire 12 between the two crimping tubes 2. Heart-shaped protective rings 13 are affixed to the inner sides of the two heart-shaped segments 11 of the dropper wire 1. The catenary dropper wire clamp 3 and the contact wire dropper wire clamp 4 are respectively connected to the heart-shaped protective rings 13 at the upper and lower ends of the dropper wire 1.
[0033] A protective device for the dropper wire of an electrified railway contact network includes a protective device. The protective device includes a crimped tube connection 51, a transition part 52, and a main line connection 53 connected sequentially from one end to the other. The crimped tube connection 51 is securely connected to any crimped tube 2, and the main line connection 53 is securely connected to the main line 12 of the dropper wire 1.
[0034] The protection device is integrally formed of an elastic material (and has certain hardness and toughness). The crimping tube connecting portion 51 and the main body wire connecting portion 53 are both sleeve-shaped with two open ends. The crimping tube connecting portion 51 is provided with a tube passing hole 511, and the main body wire connecting portion 53 is provided with a wire passing hole 531. The crimping tube connecting portion 51 is fixedly sleeved on the outer wall of the crimping tube 2 through the tube passing hole 511 (no relative sliding occurs between the crimping tube connecting portion 51 and the crimping tube 2), and the main body wire connecting portion 53 is fixedly sleeved on the main body wire 12 of the pendant wire 1 through the wire passing hole 531 (no relative sliding occurs between the main body wire connecting portion 53 and the main body wire 12 of the pendant wire 1). The transition portion 52 has no connection relationship with the main body wire 12 of the pendant wire 1, and has no connection relationship with the crimping tube 2.
[0035] The protection device is formed by combining the male part 54 and the female part 55. The male part 54 and the female part 55 sequentially include a half crimping tube connecting portion, a half transition portion and a half main body wire connecting portion from one end to the other end. The half crimping tube connecting portion on the male part 54 and the half crimping tube connecting portion on the female part 55 respectively include a half tube passing hole which is split along the axial direction. The half main body wire connecting portion on the male part 54 and the half main body wire connecting portion on the female part 55 respectively include a half wire passing hole which is split along the axial direction. The half crimping tube connecting portion on the male part 54 is provided with a plug A 541, and the half crimping tube connecting portion on the female part 55 is provided with a plug hole A which cooperates with the plug A 541. The half main body wire connecting portion on the male part 54 is provided with a plug B 542, and the half main body wire connecting portion on the female part 55 is provided with a plug hole B which cooperates with the plug B 542. When the male part 54 and the female part 55 are combined, the plug A 541 on the male part 54 is inserted into the plug hole A on the female part 55, the half tube passing hole included by the male part 54 and the female part 55 is combined to form a complete tube passing hole 511, the plug B 542 on the male part 54 is inserted into the plug hole B on the female part 55, and the half wire passing hole included by the male part 54 and the female part 55 is combined to form a complete wire passing hole 531.
[0036] Preferably, the plugs A on the male part are divided into two groups, each group including two plugs A, and the two groups of plugs A are symmetrically arranged on both sides of the half tube passing hole on the male part. Correspondingly, the plug holes A on the female part are arranged at the same positions as the plugs A on the male part, and the number of the plug holes A on the female part is the same as the number of the plugs A on the male part.
[0037] Preferably, the plugs B on the male part are divided into two groups, each group including three plugs B, and the two groups of plugs B are symmetrically arranged on both sides of the half wire passing hole on the male part. Correspondingly, the plug holes B on the female part are arranged at the same positions as the plugs B on the male part, and the number of the plug holes B on the female part is the same as the number of the plugs B on the male part.
[0038] Embodiment 2
[0039] Referring to Figure 5 , the embodiment differs from Embodiment 1 in that the protection device is a whole piece of malleable wire, which has the characteristic of setting as it bends; one end of the malleable wire is spirally wound on the outer wall of the compression tube 2, i.e. forming the compression tube connecting part 51 (no relative slip occurs between the compression tube connecting part 51 and the compression tube 2), the other end of the malleable wire is spirally wound on the main body wire 12 of the dropper wire 1, i.e. forming the main body wire connecting part 53 (no relative slip occurs between the main body wire connecting part 53 and the main body wire 12 of the dropper wire 1), and the middle part of the malleable wire is the transition part 52, which has no connection relationship with the main body wire 12 of the dropper wire 1 and has no connection relationship with the compression tube 2.
[0040] Briefly describe the working principle of the utility model:
[0041] The method for the vibration shunt of the overhead contact line of the electrified railway is based on the above-mentioned overhead contact line dropper protection device of the electrified railway. The essential feature is to shunt and partially absorb the vibration wave conducted to the dropper, thereby reducing the damage of the vibration wave to the dropper.
[0042] When only one set of protection device is installed on the dropper, the method is as follows:
[0043] Referring to Figure 7 , the protection device is installed between the upper compression tube and the main body wire of the dropper wire; the vibration wave generated by the running of the electric locomotive is transmitted to the contact wire through the pantograph, and then transmitted to the main body wire of the dropper wire through the contact wire dropper wire clamp from bottom to top; when the vibration wave reaches the connection between the main body wire connecting part and the main body wire of the dropper wire, it is shunted into two relatively weak vibration waves, one of which is conducted to the protection device and shunted and partially absorbed by the protection device; the other one continues to conduct upwards along the main body wire of the dropper wire, realizing vibration shunt (the technical effect brought about is that the vibration of the dropper wire at A is greatly slowed down, thereby slowing down the process of wire breakage / disconnection at A, thereby prolonging the service life of the dropper).
[0044] When two sets of protection devices are installed on the dropper, the method is as follows:
[0045] One set of protection devices is installed between the upper crimping tube and the main body wire of the dropline, and the other set of protection devices is installed between the lower crimping tube and the main body wire of the dropline; the vibration wave generated by the running of the electric locomotive is transmitted to the contact wire through the pantograph, then transmitted to the main body wire of the dropline through the dropline clamp, and then transmitted to the main body wire of the dropline through the protection device at the lower end and the protection device at the upper end in turn; when the vibration wave reaches the connection between the crimping tube connecting part of the lower end protection device and the lower crimping tube, it is divided into two relatively weak vibration waves, one of which is transmitted to the lower end protection device and is divided and partially absorbed by the lower end protection device; the other one continues to conduct upwards along the main body wire of the dropline, realizing the first vibration division (the technical effect brought about is that the vibration of the dropline at B is greatly slowed down, thereby slowing down the process of wire breakage / disconnection of the dropline at B, thereby prolonging the service life of the dropline); when the divided vibration wave reaches the connection between the main body wire connecting part of the upper end protection device and the main body wire of the dropline, it is again divided into two relatively weak vibration waves, one of which is transmitted to the upper end protection device and is divided and partially absorbed by the upper end protection device; the other one continues to conduct upwards along the main body wire of the dropline, realizing the second vibration division (the technical effect brought about is that the vibration of the dropline at A is greatly slowed down, thereby slowing down the process of wire breakage / disconnection of the dropline at A, thereby prolonging the service life of the dropline).
[0046] In the above method, the two crimping tubes on the dropline are sequentially named as the upper crimping tube and the lower crimping tube from top to bottom.
Claims
1. A protective device for the catenary dropper of an electrified railway, applied to the dropper; the dropper includes a dropper wire, a crimping tube, a catenary dropper wire clamp, and a contact wire dropper wire clamp; the dropper wire is bent at both the upper and lower ends to form heart-shaped sections, and the two heart-shaped sections are joined together by crimping tubes at the upper and lower ends, with the dropper wire forming the main wire between the two crimping tubes; heart-shaped protective rings are affixed to the inner sides of the two heart-shaped sections of the dropper wire; the catenary dropper wire clamp and the contact wire dropper wire clamp are respectively connected to the heart-shaped protective rings at the upper and lower ends of the dropper wire; Its characteristics are: It includes a protective device; the protective device includes a crimped tube connection, a transition section and a main line connection section connected sequentially from one end to the other; the crimped tube connection is fastened to any crimped tube, and the main line connection is fastened to the main line of the dropper.
2. The overhead contact line dropper protection device for electrified railways as described in claim 1, characterized in that: The protective device is made of a single piece of elastic material; the crimping tube connection and the main line connection are both open-ended sleeves. The crimping tube connection has a through hole, and the main line connection has a through hole. The crimping tube connection is fixedly sleeved on the outer wall of the crimping tube through the through hole, and the main line connection is fixedly sleeved on the main line of the dropper wire through the through hole. The transition part has no connection with the main line of the dropper wire or the crimping tube.
3. The overhead contact line dropper protection device for electrified railways as described in claim 2, characterized in that: The protective device is composed of a male and a female component. From one end to the other, the male and female components respectively include a half-crimped tube connection, a half-transition section, and a half-main wire connection. The half-crimped tube connection on the male and female components each includes a half-strip of through-hole cut along the axial direction. The half-main wire connection on the male and female components each includes a half-strip of through-hole cut along the axial direction. The half-crimped tube connection on the male component is equipped with a pin A, and the half-crimped tube on the female component... The connecting part is provided with a socket A that mates with the plug A; the connecting part of the male body is provided with a plug B on half of the main body wire connecting part, and the connecting part of the female body is provided with a socket B that mates with the plug B; when the male body and the female body are assembled, the plug A on the male body is inserted into the socket A on the female body, and the half of the through hole contained in the male body and the female body respectively are assembled to form a complete through hole, and the plug B on the male body is inserted into the socket B on the female body, and the half of the through hole contained in the male body and the female body respectively are assembled to form a complete through hole.
4. The overhead contact line dropper protection device for electrified railways as described in claim 3, characterized in that: There are two sets of insertion posts A on the male body, each set containing at least one insertion post A. The two sets of insertion posts A are symmetrically arranged on both sides of the half-strip through hole on the male body. Correspondingly, the distribution position of the insertion holes A on the female body is the same as the distribution position of the insertion posts A on the male body, and the number of insertion holes A on the female body is the same as the number of insertion posts A on the male body.
5. The overhead contact line dropper protection device for electrified railways as described in claim 4, characterized in that: There are two sets of pins B on the male part, each set containing at least one pin B. The two sets of pins B are symmetrically arranged on both sides of the half-hole on the male part. Correspondingly, the distribution of the holes B on the female part is the same as the distribution of the pins B on the male part, and the number of holes B on the female part is the same as the number of pins B on the male part.
6. The overhead contact line dropper protection device for electrified railways as described in claim 1, characterized in that: The entire protective device is a single flexible wire, which has the characteristic of being able to bend and shape instantly. One end of the flexible wire is spirally wound around the outer wall of the crimping tube, forming the crimping tube connection part. The other end of the flexible wire is spirally wound around the main body of the dropper wire, forming the main body connection part. The middle part of the flexible wire is the transition part, which has no connection relationship with the main body of the dropper wire or the crimping tube.