Fish plate rail seam bending moment and longitudinal tension and pressure monitoring sensor

Abstract

The invention relates to the technical field of fishplates, and discloses a fishplate rail seam bending moment and longitudinal tension and pressure monitoring sensor, which comprises a fishplate and a fishplate elastic body, and the fishplate elastic body is provided with an elastic body blind hole web plate. The elastic body blind hole web plate is provided with a fishplate bending moment sensor and a resistance strain rosette of a longitudinal tension and pressure sensor. The fishplate rail gap bending moment and longitudinal tension and pressure monitoring sensor not only can detect the error degree of a rail weighbridge caused by the longitudinal tension and pressure change of a weighing rail and an outer rail and collect data of the longitudinal tension and pressure change of the fishplate in real time, but also can detect the data of the longitudinal tension and pressure change of the fishplate due to fastener loosening, foundation sinking, loader inclination and the like of the weighing rail or the outer rail. The prying force brought to the fishplate by the vertical penetration of the steel rail at the fastener under the dynamic rolling of the wheels and the real-time acquisition of the bending moment change data of the fishplate provide a scientific basis for the improvement of the mathematical model and the function of the subsequent measurement of the rail weighbridge and the reduction of the measurement error range.

Description

Technical Field

[0001] The invention relates to the technical field of fish plates, in particular to a fish plate rail joint bending moment and longitudinal tensile pressure monitoring sensor. Background Art

[0002] Fishplates, commonly known as rail joint splints, are an important railway equipment. Fishplates are mainly used to connect railway tracks. By fixing two tracks together, they ensure the stability and safety of the train. They can withstand various loads from the track, such as the impact and friction of the train wheels. At the same time, fishplates can also be used for track repair and maintenance to improve the safety and service life of the track.

[0003] As a measuring instrument under mandatory national management, the performance of the track scale directly affects the fairness of trade settlement, production cost control, and product quality control in large-scale continuous production processes. However, in the long-term use of dynamic track scales, due to the influence of various factors such as thermal expansion and contraction of rails, failure of transition devices, and changes in rail gaps, the measurement errors gradually accumulate and become a technical bottleneck. After long-term field practice and research, it is determined that the tension, compression and bending moment of the fishplate at the rail gap are one of the main causes of the error. Therefore, a fishplate rail gap bending moment and longitudinal tension and pressure monitoring sensor is proposed, which aims to improve the measurement accuracy of the track scale, narrow the error range, and ensure the fairness of trade settlement, basic industry production cost and product quality control by monitoring the fishplate rail gap bending moment and longitudinal tension and pressure. Summary of the invention

[0004] The object of the present invention is to provide a fishplate rail joint bending moment and longitudinal tension and pressure monitoring sensor to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a fishplate rail joint bending moment and longitudinal tension and pressure monitoring sensor, comprising a fishplate body and a fishplate elastomer, the fishplate elastomer 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 glue is filled between the fishplate elastomer and the elastic body blind hole web, and the ... A longitudinal tension pressure sensor wiring board and a high-temperature wire are installed on one side of the resistance strain rosette close to the fishplate longitudinal tension pressure sensor and the fishplate bending moment sensor in the potting glue; a bending moment sensor wiring board and a high-temperature wire are installed on one side of the resistance strain rosette close to the fishplate bending moment sensor and the longitudinal tension pressure sensor in the flexible insulating potting glue; a stainless steel sealing cover plate is installed on one side of the flexible insulating potting glue; a palpable cover is installed on the other side of the flexible insulating potting glue; 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 respectively 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 positions where the central Y axis of the length of the fishplate body intersects the longitudinal X center axis of all the bolt mounting holes.

[0009] Preferably, two through holes are provided at the center of the fish plate body, and the two through holes are symmetrically distributed at the Y-axis position of the web plane of the two circular blind holes at the center of the fish plate body.

[0010] Preferably, the fish plate body is processed with threads, and the threads are located on one side outside the circular blind hole of the fish plate body, and the threads facilitate the installation of the waterproof and sealed outlet connector and the 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 is convenient for installing 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, and 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 flower patches, and the resistance value of the strain flower patches 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 flower patch, wherein R1 and R3 are pull-tabs, and R2 and R4 are pressed sheets; the longitudinal tensile and compressive stress sensor resistance strain gauge is composed of R5, R6, R7, and R8 in the strain flower patch, wherein R6 and R8 are pull-tabs, and R5 and R7 are pressed sheets.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0015] The present invention can not only detect the error degree caused to the track scale by the change of longitudinal tensile pressure of the weighing rail and the outer rail, and collect the data of the change of longitudinal tensile pressure 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 of the weighing rail or the outer rail under the dynamic rolling of the wheel due to loose fasteners, foundation sinking, inclination of the load-bearing device, etc. 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 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the front strain rosette patch of the fishplate bending moment sensor of the present invention;

[0018] Figure 3 It is a schematic diagram of the strain rosette patch on the back of the fishplate bending moment sensor of the present invention;

[0019] Figure 4 It is a schematic diagram of the front strain rosette of the fishplate longitudinal tension sensor of the present invention;

[0020] Figure 5 It is a schematic diagram of the strain rosette patch on the back of the fishplate longitudinal tension sensor of the present invention;

[0021] Figure 6 It is a schematic diagram of the electrical principle of the fishplate bending moment and longitudinal tension sensor of the present invention;

[0022] Figure 7 It is a schematic diagram of the application of the fishplate rail joint bending moment and longitudinal tension and pressure monitoring sensor of the present invention;

[0023] Figure 8It is a schematic diagram of the general assembly of the track scale without foundation pit and without track interruption of the present invention;

[0024] Fig. 9 It is a schematic diagram of the cover of the present invention.

[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 board and high-temperature wire; 4. Bending moment sensor terminal board and high-temperature wire; 5. Flexible insulating potting glue; 6. Stainless steel sealing cover plate; 7. Resistance strain rosette of 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 belly plate. 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0027] The present invention provides the following technical solutions:

[0028] Embodiment 1

[0029] See also Figure 1 The fishplate rail joint bending moment and longitudinal tension and pressure monitoring sensor comprises 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 resistance strain rosette 7 of a fishplate bending moment sensor are installed on the other side of the elastic body blind hole web 11, a flexible insulating potting glue 5 is filled between the fishplate elastic body 1 and the elastic body blind hole web 11, and the flexible insulating potting glue 5 is filled near the longitudinal A longitudinal tensile pressure sensor wiring board and a high-temperature wire 3 are installed on one side of the tensile pressure sensor and the fishplate bending moment sensor's resistance strain rosette 7, a bending moment sensor wiring board and a high-temperature wire 4 are installed on one side of the flexible insulating potting glue 5 close to the fishplate bending moment sensor and the longitudinal tensile pressure sensor's resistance strain rosette 2, 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.

[0030] The fishplate elastic body 1 is installed 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, which is 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 installing the sensor, 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] The number of the bolt mounting holes is six, and the six bolt mounting holes are grouped in pairs and are respectively located on both sides of the fishplate elastic body 1 .

[0033] Through the above technical solution, the design of six bolt mounting holes ensures the rigid connection between the fishplate elastomer 1 and the rail. The 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 of the fishplate body.

[0034] 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 length of the fishplate body and the longitudinal X center axis of all the 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 bending stress sensors and axial tensile and compressive stress sensors, which are located at the intersection of the central Y axis of the length of the fishplate body and the longitudinal X center axis of the bolt mounting hole. Such a layout helps to 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 pressure. At the same time, the design of the circular blind holes also avoids interference from the external environment and improves the measurement accuracy and stability of the sensor.

[0036] Two through holes are arranged at the center of the fish plate body, and the two through holes are symmetrically distributed at the Y axis position of the web plane of the two circular blind holes at the center of the fish plate 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 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 one side outside the circular blind hole of the fish plate body. The threads facilitate the installation of the waterproof and sealed outlet connector 9 and the 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 harmful substances such as moisture and dust from entering the interior of the sensor, ensuring the long-term stability and reliability of the sensor.

[0040] 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 is convenient for installing the stainless steel sealing cover plate 6.

[0041] Through the above technical scheme, the design of the sinker 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 sinker 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 gauge is a customized strain rosette patch, and the resistance value of the strain rosette patch can be 350Ω or 700Ω.

[0043] Through the above technical solution, these two positions are the key installation points of the sensor measuring elements. The bending moment sensor is used to measure the stress change of the fishplate body when it is subjected to the rail joint bending moment, and the resistance strain gauge of the longitudinal tensile and compressive stress sensor is used to measure the stress change of the fishplate body when it is subjected to the longitudinal tensile and compressive pressure. These measuring elements are pasted on the middle positions of the two planes of the circular blind hole web, and can directly feel the mechanical changes of the fishplate body, and convert them into electrical signals for output, thereby realizing real-time monitoring of the fishplate rail joint bending moment and longitudinal tensile and compressive pressure. The customized strain rosette has the characteristics of high precision, high stability and high sensitivity, and can accurately reflect the mechanical changes of the fishplate body. Its resistance value can be 350Ω or 700Ω. The selection of these two resistance values ​​depends on the specific application scenario and measurement requirements. By selecting the appropriate resistance value, it can be ensured that the sensor has the best sensitivity and accuracy during the measurement process, thereby realizing accurate monitoring of the fishplate rail joint bending moment and longitudinal tensile and compressive pressure. At the same time, the customized strain rosette also has good environmental adaptability and can maintain stable performance in various 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 scheme, 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 exerted on 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 exerted on the fishplate body.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the 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 joint bending moment and longitudinal tension and pressure monitoring sensor, comprising a fishplate body and a fishplate elastic body (1), characterized in that: The fishplate elastic body (1) is provided with an elastic body blind hole web (11), and a resistance strain rosette (2) of a fishplate bending moment sensor and a longitudinal tension pressure sensor is provided on the elastic body blind hole web (11), and a resistance strain rosette (7) of a fishplate longitudinal tension pressure sensor and a fishplate bending moment sensor is provided on the other side of the elastic body blind hole web (11), and a flexible insulating potting glue (5) is filled between the fishplate elastic body (1) and the elastic body blind hole web (11), and the resistance strain rosette (2) of the fishplate bending moment sensor and the longitudinal tension pressure sensor and the fishplate bending moment sensor is provided in the flexible insulating potting glue (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 joint bending moment and longitudinal tension and pressure monitoring sensor according to claim 1 is characterized in that: The fishplate elastic body (1) is mounted on the fishplate body, and a bolt mounting hole is provided on the fishplate body.

3. The fishplate rail joint bending moment and longitudinal tension and pressure monitoring sensor according to claim 2 is characterized in that: The number of the bolt mounting holes is six, and the six bolt mounting holes are grouped in pairs and are respectively located on both sides of the fishplate elastic body (1).

4. The fishplate rail joint bending moment and longitudinal tension and pressure monitoring sensor according to claim 2 is characterized in that: Two circular blind holes are provided on the fishplate body symmetrically to the rail waist thickness, and the blind holes are located at the positions where the central Y axis of the length of the fishplate body intersects the longitudinal X center axis of all the bolt installation holes.

5. The fishplate rail joint bending moment and longitudinal tension and pressure monitoring sensor according to claim 4 is characterized in that: Two through holes are arranged at the center of the fish plate body, and the two through holes are symmetrically distributed at the Y axis position of the web plane of the two circular blind holes at the center of the fish plate body.

6. The fishplate rail joint bending moment and longitudinal tension and pressure monitoring sensor according to claim 4 is characterized in that: The fish plate body is processed with threads, the threads are located on the outer side of the circular blind hole of the fish plate body, and the threads facilitate the installation of the waterproof sealing outlet connector (9) and the cover (8).

7. The fishplate rail joint bending moment and longitudinal tension and pressure monitoring sensor according to claim 4 is characterized by: 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 (6).

8. The fishplate rail joint bending moment and longitudinal tension and pressure monitoring sensor according to claim 4 is characterized by: 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 gauge is a customized strain flower patch, and the resistance value of the strain flower patch can be 350Ω or 700Ω.

9. The fishplate rail joint 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 flower patch, wherein R1 and R3 are pull-pieces, and R2 and R4 are press-pieces; the longitudinal tensile and compressive stress sensor resistance strain gauge is composed of R5, R6, R7, and R8 in the strain flower patch, wherein R6 and R8 are pull-pieces, and R5 and R7 are press-pieces.

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