Railway signal cable shielding parameter measuring device
By designing a shielding parameter measurement device for railway signal cables, the problem of unbalanced wire core to shielding capacitors in the production process is solved, and the unbalanced performance of cable to ground capacitors is realized in advance to avoid material waste and production cost loss.
Patent Information
- Application Number
- CN202323378321.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-12
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2033-12-12
AI Technical Summary
During the production process of railway signal cables, due to factors such as equipment, technology, personnel, materials, and environment, the performance indicators of the shielding capacitors are often large, and the external capacitors cannot be tested in time after the star twisting process is completed. Imbalance leads to waste of materials.
A railway signal cable shielding parameter measurement device is designed, including a wire-receiving barrel, a spiral metal wire trough, a fixing fixture and a capacitance coupling tester. Through this device, the cable can be detected before production and the cable can be identified. Is there any abnormality in the core?
The device can detect the unbalanced performance of cable to ground capacitance in advance, avoid losses caused by poor cable batches, reduce the number of trial productions of new products, save R&D costs, and assist technicians in conducting product defect analysis to predict invisible quality problems of cables.
Smart Images
Figure CN222439589U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cable manufacturing, in particular to a railway signal cable shielding parameter testing device. Background Art
[0002] Railway signal cables are mainly used for signal transmission between signal towers and signal machines. They usually work in electrified sections or areas with strong electrical interference. In order to reduce the interference of strong electricity on signal transmission, the transmission line cores are usually shielded in a single group or the entire cable cores are shielded as a whole. For example, railway signal cables are generally made of four insulated single wires (red, green, white, and blue) twisted together. The process of twisting the four single wires is called a star-twisting process. After the star-twisting process is completed, it is necessary to enter the shielding process. The shielding process mainly involves longitudinally wrapping a layer of copper tape on the cable core.
[0003] Due to the influence of factors such as equipment, process, personnel, materials, and environment during the cable production process, the performance index of the core-to-shield capacitance imbalance is often too large. Before the core shielding, there are insulation, star-twisting and other processes. The product quality of each process may affect the capacitance imbalance performance of the core-to-shield. In order to ensure the stability of signal transmission, the core-to-ground capacitance imbalance needs to be tested after the shielding production is completed. The capacitance imbalance parameter is often affected by the product quality of the star-twisting process. However, since the star-twisting process does not have a shielding layer, it is impossible to timely test the capacitance imbalance ea1 and ea2 indicators. After the shielding process is completed, a large number of products have often been produced in the insulation and star-twisting processes. Testing the capacitance imbalance to ground and failing to meet the standards can easily lead to material waste. Utility Model Content
[0004] The utility model aims to provide a device for measuring shielding parameters of railway signal cables.
[0005] In order to achieve the above technical purpose, the technical solution of the utility model is:
[0006] The invention discloses a railway signal cable shielding parameter measuring device, comprising a take-up drum body, a metal wire trough being arranged on the outer surface of the take-up drum body, the metal wire trough being spirally wound on the outer surface of the take-up drum body, the metal wire trough being provided with a metal wire trough cover used in conjunction with the metal wire trough, a first cable core fixing fixture being arranged on the head end of the metal wire trough, and a second cable core fixing fixture being arranged on the tail end of the metal wire trough.
[0007] When in use, the head end of the cable is clamped and fixed by the first cable core fixing clamp, and the cable is inserted into the metal wire trough and covered with the metal wire trough cover. The cable at the tail end of the metal wire trough is clamped and fixed by the second cable core fixing clamp, and then each core of the cable and the metal wire trough are connected to the capacitive coupling tester, and then the shielding parameters of the railway signal cable are measured by the capacitive coupling tester.
[0008] At the head end of the metal wire trough, the wire take-up drum is provided with a first side plate, and the first cable core fixing fixture is provided on the first side plate.
[0009] In order to facilitate the rotation of the power drive device, the first side plate is provided with a positioning pin.
[0010] At the tail end of the metal wire trough, the wire take-up drum is provided with a second side plate, and the second cable core fixing fixture is provided on the second side plate.
[0011] The utility model provides a side plate and a wire take-up drum body as the main frame of the testing device. The wire take-up drum body is provided with a spiral semicircular groove. Both ends of the groove are provided with fixing clamps to fix the wire core. The side plate is provided with a positioning pin for convenient power-driven rotation, so that the device as a whole can be disassembled and assembled on the wire take-up frame of the stranding machine.
[0012] The utility model can be placed on a twisted wire rack for the first coil test, so as to predict in advance the quality of the product produced this time, and effectively save material and labor costs.
[0013] The utility model can assist technicians to perform product defect analysis through a capacitive coupling tester, predict invisible quality problems of cables, eliminate the influence of some factors on products, avoid batch production of defective products, and reduce production cost waste. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0015] Figure 1 It is a partial structural schematic diagram of the utility model.
[0016] Figure 2 This is a schematic diagram of the structure of the cable being inserted into a metal wire trough according to the utility model.
[0017] Figure 3 This is a schematic diagram of the utility model in use state. DETAILED DESCRIPTION
[0018] like Figure 1-3 As shown, the railway signal cable shielding parameter measuring device includes a take-up drum body 1, a spiral metal wire groove 4 is arranged on the outer surface of the take-up drum body 1, and the spiral metal wire groove 4 is spirally wound on the outer surface of the take-up drum body 1. At the head end of the metal wire groove 4, the take-up drum body 1 is provided with a first side plate 2, and a first cable core fixing fixture 6 is arranged on the first side plate 2. At the tail end of the metal wire groove 4, the take-up drum body 1 is provided with a second side plate 3, and a second cable core fixing fixture is arranged on the second side plate 3.
[0019] The metal wire trough 4 is provided with a metal wire trough cover 5 used together with the metal wire trough 4 , and the metal wire trough cover 5 covers the cables in the metal wire trough 4 .
[0020] The first side plate 2 is also provided with a positioning pin (not shown in the figure).
[0021] When in use, the head end of the cable 7 is clamped and fixed by the first cable core fixing clamp 6 on the first side panel 2, and the cable 7 is inserted into the metal wire trough 4. After the cable 7 is inserted into the metal wire trough 4, the metal wire trough cover 5 is put on. The cable 7 at the tail end of the metal wire trough 4 is clamped and fixed by the second cable core fixing clamp on the second side panel 3. Then, the four insulated single wires (red, green, white and blue) of the cable 7 are respectively connected to the capacitive coupling tester 9. The capacitive coupling tester 9 is also connected to the metal wire trough 4 and the metal wire trough cover 5. Then, the shielding parameters of the railway signal cable are measured through the capacitive coupling tester 9, which assists technicians in conducting product defect analysis, predicting invisible quality problems of the cable, eliminating the influence of some factors on the product, avoiding mass production of defective products, and reducing production cost waste.
[0022] In the existing technology, some technical parameters are not visible during the cable production process, and specific technical parameters can only be tested after the semi-finished products are produced. Due to the fast production speed, when the first batch of defective products is found, there are often already small batches of defective products. This device can detect the unbalanced performance of the cable-to-ground capacitance in advance before the production of shielding to identify whether the cable core is abnormal, avoiding losses caused by batch defects of cables. In the process of new product development, the first batch test can also be carried out through this device to test some cable electrical performance indicators in advance, reduce the number of new product development trials, and save R&D costs.
[0023] The above embodiments do not limit the present invention in any way, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
Claims
1. Railway signal cable shielding parameter measuring device, characterized in that: It includes a wire take-up drum body, the outer surface of which is provided with a metal wire trough, the metal wire trough is spirally wound on the outer surface of the wire take-up drum body, the metal wire trough is provided with a metal wire trough cover used in conjunction with the metal wire trough, the wire take-up drum body is provided with a first cable core fixing fixture at the head end of the metal wire trough, and the wire take-up drum body is provided with a second cable core fixing fixture at the tail end of the metal wire trough.
2. The railway signal cable shielding parameter measuring device according to claim 1, characterized in that: At the head end of the metal wire trough, the wire take-up drum is provided with a first side plate, and the first cable core fixing fixture is provided on the first side plate.
3. The railway signal cable shielding parameter measuring device according to claim 2, characterized in that: The first side plate is provided with a positioning pin.
4. The railway signal cable shielding parameter measuring device according to claim 1, characterized in that: At the tail end of the metal wire trough, the wire take-up drum is provided with a second side plate, and the second cable core fixing fixture is provided on the second side plate.