Fish plate rail seam bending moment and longitudinal tension and pressure monitoring sensor
By installing elastomer and resistance strain flower on the fishtail plate rail joint bending moment and longitudinal tension pressure monitoring sensor, the problem of accumulation of dynamic track scale measurement errors is solved, real-time monitoring of mechanical changes at the fishtail plate rail joints is achieved, and measurement accuracy is improved.
Patent Information
- Application Number
- CN202422829779.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-11-20
AI Technical Summary
In the long-term use of dynamic track scale, due to factors such as thermal expansion and contraction of rails, transitioner failure, and rail joint changes, metrological errors gradually accumulate. The tension and bending moment at the rail joints of fishtail plates are the main reasons, resulting in inaccurate metrology.
A sensor for bending moment and longitudinal tension pressure monitoring of fish tail plate rail joints is designed. By installing elastomers and resistance strain flowers on the fish tail plate, the changes in bending moments and longitudinal tension pressures at the rail joints of fish tail plates are monitored in real time, including components such as fish tail plate body, elastomer, elastomer blind hole web, resistance strain flowers, flexible insulating potting, stainless steel sealing cover plate, etc., to ensure the stability and accuracy of the sensor.
Real-time acquisition of changes in longitudinal tension pressure and bending moment of fish tail plates is achieved, the measurement error range of track scale is narrowed, the measurement accuracy is improved, and the fairness of trade settlement and production cost control are ensured.
Smart Images
Figure CN223283802U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fish plates, in particular to a fish plate rail gap bending moment and longitudinal tensile pressure monitoring sensor. Background Art
[0002] Fishplates, commonly known as rail joint splints, are essential railway equipment. They are primarily used to connect rails, securing two tracks together and ensuring train stability and safety. They can withstand various track loads, such as impact and friction from train wheelsets. Fishplates can also be used for track repair and maintenance, enhancing track safety and service life.
[0003] As a measuring instrument subject to mandatory national management, the performance of track scales directly impacts the fairness of trade settlements, production cost control, and product quality control during large-scale continuous production. However, over long-term use, dynamic track scales are subject to the gradual accumulation of measurement errors due to factors such as thermal expansion and contraction of rails, failure of transition devices, and changes in rail gaps, becoming a technical bottleneck. Through long-term field practice and research, it was determined that the tension, compression, and bending moment of the fishplate at the rail gap are one of the main causes of these errors. Therefore, a fishplate track gap bending moment and longitudinal tension and pressure monitoring sensor was proposed. This sensor aims to improve the measurement accuracy of track scales, narrow the error range, and safeguard the fairness of trade settlements, control production costs in basic industries, and control product quality by monitoring the fishplate track gap bending moment and longitudinal tension and pressure. Utility Model Content
[0004] The purpose of the utility model is to provide a fishplate rail gap bending moment and longitudinal tension and pressure monitoring sensor to solve the problems raised in the above background technology.
[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a fishplate rail gap bending moment and longitudinal tension and pressure monitoring sensor, comprising a fishplate body and a fishplate elastic body, wherein the fishplate elastic body is installed with an elastic body blind hole web, the elastic body blind hole web is installed with a fishplate bending moment sensor and a resistance strain rosette of a longitudinal tension and pressure sensor, the other side of the elastic body blind hole is installed with a fishplate longitudinal tension and pressure sensor and a resistance strain rosette of a fishplate bending moment sensor, a flexible insulating potting compound is filled between the fishplate elastic body and the elastic body blind hole web, and the flexible A longitudinal tension pressure sensor wiring board and a high-temperature wire are installed on one side of the resistance strain rosette in the insulating potting compound near the fishplate longitudinal tension pressure sensor and the fishplate bending moment sensor. A bending moment sensor wiring board and a high-temperature wire are installed on one side of the resistance strain rosette in the flexible insulating potting compound near the fishplate bending moment sensor and the longitudinal tension pressure sensor. A stainless steel sealing cover is installed on one side of the flexible insulating potting compound, and a palpable cover is installed on the other side of the flexible insulating potting compound. A waterproof sealed outlet connector is installed on the palpable cover, and a multi-core shielded cable is installed on the waterproof sealed outlet connector.
[0006] Preferably, the fishplate elastic body is mounted on the fishplate body, and the fishplate body is provided with bolt mounting holes.
[0007] Preferably, the number of the bolt mounting holes is six, and the six bolt mounting holes are grouped in pairs and are located on both sides of the fishplate elastic body.
[0008] Preferably, two circular blind holes are provided on the fishplate body symmetrically to the rail waist thickness, and the blind holes are located at the intersection of the central Y axis of the fishplate body and the longitudinal X center axis of all the bolt mounting holes.
[0009] Preferably, two through holes are provided in the center of the fishplate body, and the two through holes are symmetrically distributed on the Y-axis position of the web plane of the two circular blind holes in the center of the fishplate body.
[0010] Preferably, the fish plate body is processed with threads, and the threads are located on the outer side of the circular blind hole of the fish plate body. The threads facilitate the installation of the waterproof sealed outlet connector and the palpable cover.
[0011] Preferably, a sink is processed on the fish plate body, and the sink is located inside the circular blind hole of the fish plate body. The sink facilitates the installation of the stainless steel sealing cover plate.
[0012] Preferably, resistance strain gauges are pasted on the middle positions of the two planes of the two circular blind hole webs. The two resistance strain gauges are respectively a bending moment sensor resistance strain gauge and a longitudinal tensile and compressive stress sensor resistance strain gauge. The resistance strain gauges are customized strain rosettes, and the resistance value of the strain rosette can be 350Ω or 700Ω.
[0013] Preferably, the bending moment sensor resistance strain gauge is composed of R1, R2, R3, and R4 in the strain rosette patch, wherein R1 and R3 are pull-tabs, and R2 and R4 are press-tabs; the longitudinal tensile and compressive stress sensor resistance strain gauge is composed of R5, R6, R7, and R8 in the strain rosette patch, wherein R6 and R8 are pull-tabs, and R5 and R7 are press-tabs.
[0014] Compared with the prior art, the beneficial effects achieved by the present invention are:
[0015] The utility model can not only detect the error degree caused by the change of longitudinal tensile pressure of the weighing rail and the outer rail to the track scale, and collect the data of the longitudinal tensile pressure change of the fishplate in real time, but also detect the prying force brought to the fishplate by the up and down movement of the rail at the fastener under the dynamic rolling of the wheel due to loose fasteners of the weighing rail or the outer rail, sinking of the foundation, tilt of the load-bearing device, etc., and the real-time collection of the bending moment change data of the fishplate provides a scientific basis for improving the mathematical model and function of the subsequent measurement of the track scale and reducing the measurement error range. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the front strain rosette of the fishplate bending moment sensor of the utility model;
[0018] Figure 3 This is a schematic diagram of the strain rosette patch on the back of the fishplate bending moment sensor of the utility model;
[0019] Figure 4 This is a schematic diagram of the front strain rosette of the fishplate longitudinal tension sensor of the utility model;
[0020] Figure 5 This is a schematic diagram of the strain rosette patch on the back of the fishplate longitudinal tension sensor of the utility model;
[0021] Figure 6 This is a schematic diagram of the electrical principle of the fishplate bending moment and longitudinal tension sensor of the utility model;
[0022] Figure 7 This is a schematic diagram of the application of a fishplate rail joint bending moment and longitudinal tension and pressure monitoring sensor of the utility model;
[0023] Figure 8 This is a schematic diagram of the general assembly of the utility model's pit-free and track-breaking track scale;
[0024] Figure 9 It is a schematic diagram of the utility model.
[0025] Among them: 1. Fishplate elastomer; 2. Resistance strain rosette with fishplate bending moment sensor and longitudinal tension pressure sensor; 3. Longitudinal tension pressure sensor terminal block and high-temperature wire; 4. Bending moment sensor terminal block and high-temperature wire; 5. Flexible insulating potting compound; 6. Stainless steel sealing cover; 7. Resistance strain rosette with fishplate longitudinal tension pressure sensor and fishplate bending moment sensor; 8. Palpable cover; 9. Waterproof sealed outlet connector; 10. Multi-core shielded cable; 11. Elastomer blind hole web. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0027] The utility model provides the following technical solutions:
[0028] Example 1
[0029] See also Figure 1 A fishplate rail joint bending moment and longitudinal tension and pressure monitoring sensor includes a fishplate body and a fishplate elastic body 1, an elastic body blind hole web 11 is installed on the fishplate elastic body 1, a resistance strain rosette 2 of a fishplate bending moment sensor and a longitudinal tension and pressure sensor is installed on the elastic body blind hole web 11, a fishplate longitudinal tension and pressure sensor and a fishplate bending moment sensor resistance strain rosette 7 are installed on the other side of the elastic body blind hole web 11, a flexible insulating potting compound 5 is filled between the fishplate elastic body 1 and the elastic body blind hole web 11, and the flexible insulating potting compound 5 is close to the fishplate. A longitudinal tension pressure sensor terminal block and a high-temperature wire 3 are installed on one side of the resistance strain rosette 7 of the longitudinal tension pressure sensor and the fishtail plate bending moment sensor. A bending moment sensor terminal block and a high-temperature wire 4 are installed on one side of the flexible insulating potting glue 5 close to the resistance strain rosette 2 of the fishtail plate bending moment sensor and the longitudinal tension pressure sensor. A stainless steel sealing cover plate 6 is installed on one side of the flexible insulating potting glue 5, and a palpable cover 8 is installed on the other side of the flexible insulating potting glue 5. A waterproof sealed outlet connector 9 is installed on the palpable cover 8, and a multi-core shielded cable 10 is installed on the waterproof sealed outlet connector 9.
[0030] The fishplate elastic body 1 is mounted on the fishplate body, and bolt mounting holes are provided on the fishplate body.
[0031] Through the above technical solution, the fishplate elastomer 1 is the core part of the sensor, responsible for converting the rail gap bending moment and longitudinal tensile pressure exerted on the fishplate body into measurable signals. The fishplate body serves as the basis for sensor installation, and the bolt mounting holes opened on it are used to rigidly connect the fishplate elastomer 1 to the rail through bolts, ensuring that the sensor can accurately sense the mechanical changes exerted on the fishplate body. This design not only ensures the stability and reliability of the sensor, but also facilitates installation and disassembly.
[0032] There are six bolt mounting holes, which are grouped in pairs and are located on both sides of the fishplate elastic body 1 .
[0033] Through the above technical solution, the design of six bolt mounting holes ensures a rigid connection between the fishplate elastomer 1 and the rail. These six holes are arranged in groups of two and are located on both sides of the fishplate elastomer 1 to form a symmetrical layout, which helps to balance and disperse stress and prevent damage caused by stress concentration. In addition, this design also improves the stability and accuracy of the sensor, enabling it to more accurately reflect the mechanical changes experienced by the fishplate body.
[0034] Two circular blind holes are opened on the fishplate body symmetrically to the thickness of the rail waist. The blind holes are located at the intersection of the central Y axis of the fishplate body and the longitudinal X center axis of all bolt mounting holes.
[0035] Through the above technical solution, the two circular blind holes are designed to install measuring elements inside the sensor, such as the bending stress sensor and the axial tensile and compressive stress sensor. They are located at the intersection of the Y-axis line of the fishplate body and the longitudinal X-axis line of the bolt mounting hole. This layout helps ensure that the sensor can accurately capture the stress changes of the fishplate body when it is subjected to the rail gap bending moment and longitudinal tensile and compressive forces. At the same time, the design of the circular blind holes also avoids interference from the external environment, thereby improving the measurement accuracy and stability of the sensor.
[0036] Two through holes are provided at the center of the fishplate body, and the two through holes are symmetrically distributed on the Y axis position of the web plane of the two circular blind holes at the center of the fishplate body.
[0037] Through the above technical solution, the design of the two through holes on the web plane of the blind hole is mainly used for connecting and fixing between sensors. They are located on the Y-axis position of the web plane of the two circular blind holes in the center of the fishtail plate body, forming a symmetrical layout with the blind holes. This design not only helps to ensure the stability and reliability of the sensor, but also facilitates the routing of the process.
[0038] The fish plate body is processed with threads, which are located on the outer side of the circular blind hole of the fish plate body. The threads facilitate the installation of the waterproof and sealed outlet connector 9 and the palpable cover 8.
[0039] Through the above technical solution, special sealant is applied to all threads of the palpable cover 8. These components are crucial for protecting the internal components of the sensor from the influence of the external environment. The presence of the threads enables the waterproof sealed outlet connector 9 and the palpable cover 8 to be tightly fixed on the fishtail plate body, thereby preventing moisture, dust and other harmful substances from entering the interior of the sensor, ensuring the long-term stability and reliability of the sensor.
[0040] A sink is machined on the fish plate body and is located inside the circular blind hole of the fish plate body. The sink facilitates the installation of the stainless steel sealing cover plate 6 .
[0041] Through the above technical solution, the design of the sink is to facilitate the installation of the stainless steel sealing cover plate 6. The stainless steel sealing cover plate 6 is an important component of the sensor and is used to protect the measuring elements inside the sensor from the influence of the external environment. The presence of the sink enables the stainless steel sealing cover plate 6 to be stably installed on the fishtail plate body and form a tight seal with the fishtail plate body, thereby further improving the waterproof and dustproof performance of the sensor.
[0042] Resistance strain gauges are pasted on the middle positions of the two planes of the two circular blind hole webs. The two resistance strain gauges are respectively a bending moment sensor resistance strain gauge and a longitudinal tensile and compressive stress sensor resistance strain gauge. The resistance strain gauges are customized strain rosettes, and the resistance value of the strain rosette can be 350Ω or 700Ω.
[0043] The above technical solution establishes these two locations as key installation points for the sensor's measuring elements. The bending moment sensor measures stress changes in the fishplate body when subjected to the rail gap bending moment, while the resistance strain gauge of the longitudinal tension and compression stress sensor measures stress changes in the fishplate body when subjected to longitudinal tension and compression. These measuring elements, affixed between the two flat surfaces of the circular blind hole web, can directly sense mechanical changes in the fishplate body and convert them into electrical signals for output, enabling real-time monitoring of the fishplate's rail gap bending moment and longitudinal tension and compression. The customized strain gauge rosette features high precision, high stability, and high sensitivity, accurately reflecting mechanical changes in the fishplate body. Its resistance can be either 350Ω or 700Ω, depending on the specific application scenario and measurement requirements. Choosing the appropriate resistance ensures optimal sensor sensitivity and accuracy during measurement, enabling accurate monitoring of the fishplate's rail gap bending moment and longitudinal tension and compression. Furthermore, the customized strain gauge rosette exhibits excellent environmental adaptability, maintaining stable performance in a variety of harsh environments.
[0044] The resistance strain gauge of the bending moment sensor is composed of R1, R2, R3, and R4 in the strain rosette patch, among which R1 and R3 are pull-pieces, and R2 and R4 are compression pieces. The resistance strain gauge of the longitudinal tensile and compressive stress sensor is composed of R5, R6, R7, and R8 in the strain rosette patch, among which R6 and R8 are pull-pieces, and R5 and R7 are compression pieces.
[0045] Through the above technical solution, R1 and R3 are designed as pull tabs, which are responsible for measuring and responding to the tensile strain caused by the bending moment, while R2 and R4 are designed as pressure tabs, which are responsible for measuring and responding to the compressive strain caused by the bending moment. Through such a design, the bending moment sensor can accurately calculate the magnitude and direction of the bending moment applied to the fishplate body; R6 and R8 are designed as pull tabs, which are responsible for measuring and responding to the tensile strain caused by the longitudinal tension, while R5 and R7 are designed as pressure tabs, which are responsible for measuring and responding to the compressive strain caused by the longitudinal pressure. Through such a design, the longitudinal tensile and compressive stress sensor can accurately calculate the magnitude of the longitudinal tensile and compressive pressure applied to the fishplate body.
[0046] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit thereof, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A fishplate rail gap bending moment and longitudinal tension and pressure monitoring sensor, comprising a fishplate body and a fishplate elastic body (1), characterized in that: The fish plate elastic body (1) is provided with an elastic body blind hole web (11), and the elastic body blind hole web (11) is provided with a fish plate bending moment sensor and a resistance strain rosette (2) of a longitudinal tension pressure sensor, and the other side of the elastic body blind hole web (11) is provided with a fish plate longitudinal tension pressure sensor and a resistance strain rosette (7) of a fish plate bending moment sensor, and a flexible insulating potting compound (5) is filled between the fish plate elastic body (1) and the elastic body blind hole web (11), and the resistance strain rosette (2) of the fish plate longitudinal tension pressure sensor and the fish plate bending moment sensor is filled in the flexible insulating potting compound (5). A longitudinal tension and pressure sensor wiring board and a high-temperature wire (3) are installed on one side of the flower (7); a bending moment sensor wiring board and a high-temperature wire (4) are installed on one side of the resistance strain flower (2) in the flexible insulating potting glue (5) close to the fishtail plate bending moment sensor and the longitudinal tension and pressure sensor; a stainless steel sealing cover plate (6) is installed on one side of the flexible insulating potting glue (5); a palpable cover (8) is installed on the other side of the flexible insulating potting glue (5); a waterproof sealed outlet connector (9) is installed on the palpable cover (8); and a multi-core shielded cable (10) is installed on the waterproof sealed outlet connector (9).
2. The fishplate rail gap bending moment and longitudinal tension and pressure monitoring sensor according to claim 1, characterized in that: The fish plate elastic body (1) is mounted on the fish plate body, and a bolt mounting hole is provided on the fish plate body.
3. The fishplate rail gap bending moment and longitudinal tension and pressure monitoring sensor according to claim 2, characterized in that: The number of the bolt mounting holes is six, and the six bolt mounting holes are grouped in pairs and are located on both sides of the fishplate elastic body (1).
4. The fishplate rail gap bending moment and longitudinal tension and pressure monitoring sensor according to claim 2, characterized in that: Two circular blind holes are provided on the fishplate body symmetrically to the rail waist thickness. The blind holes are located at the intersection of the central Y axis of the fishplate body and the longitudinal X center axis of all the bolt mounting holes.
5. The fishplate rail gap bending moment and longitudinal tension and pressure monitoring sensor according to claim 4, characterized in that: Two through holes are provided in the center of the fish plate body, and the two through holes are symmetrically distributed on the Y axis position of the web plane of the two circular blind holes in the center of the fish plate body.
6. The fishplate rail gap bending moment and longitudinal tension and pressure monitoring sensor according to claim 4, characterized in that: The fish plate body is processed with threads, which are located on the outer side of the circular blind hole of the fish plate body. The threads facilitate the installation of the waterproof sealed outlet connector (9) and the palpable cover (8).
7. The fishplate rail gap bending moment and longitudinal tension and pressure monitoring sensor according to claim 4, characterized in that: A sink is machined on the fish plate body, and the sink is located inside the circular blind hole of the fish plate body. The sink facilitates the installation of the stainless steel sealing cover plate (6).
8. The fishplate rail gap bending moment and longitudinal tension and pressure monitoring sensor according to claim 4, characterized in that: Resistance strain gauges are pasted on the middle positions of the two planes of the two circular blind hole webs. The two resistance strain gauges are respectively a bending moment sensor resistance strain gauge and a longitudinal tensile and compressive stress sensor resistance strain gauge. The resistance strain gauges are customized strain rosettes, and the resistance value of the strain rosette can be 350Ω or 700Ω.
9. The fishplate rail gap bending moment and longitudinal tension and pressure monitoring sensor according to claim 8, characterized in that: The bending moment sensor resistance strain gauge is composed of R1, R2, R3, and R4 in the strain rosette patch, among which R1 and R3 are pull-tabs, and R2 and R4 are press-tabs. The longitudinal tensile and compressive stress sensor resistance strain gauge is composed of R5, R6, R7, and R8 in the strain rosette patch, among which R6 and R8 are pull-tabs, and R5 and R7 are press-tabs.