Train track scale with anti-unbalance load and weighing method thereof

Abstract

The present application belongs to the field of train track scale, and relates to a train track scale for preventing deviation load and a weighing method thereof. The train track scale for preventing deviation load comprises guide rails, weighing rails arranged between the guide rails, and a weighing device arranged below the weighing rails. The weighing device comprises a scale body and a screw rod elevator movably arranged below four corners of the scale body. A slide rail is arranged at a middle position below the scale body. Two weighing sliders are respectively slidably installed on the slide rail along the length direction of the weighing rail. A weighing sensor is arranged on the top of each weighing slider to weigh. Two distance measuring sensors are further installed on the side edges of the weighing rail. The distance measuring sensors and the weighing sliders are both connected with a control module to cooperatively control the position of the weighing sensor, thereby achieving the purpose of preventing deviation load. The present application realizes multiple goals of "preventing deviation load, high precision, long service life and easy operation" through intelligent adaptive adjustment and mechanical isolation design.

Description

Technical Field

[0001] This invention belongs to the field of railway track scales and relates to an anti-eccentric load railway track scale and its weighing method. Background Technology

[0002] In the railway transportation industry, track scales are widely used as important measuring equipment for weighing goods loaded onto trains. However, traditional track scale designs have some inherent technical problems, particularly regarding measurement accuracy under off-center loading conditions and the lifespan of the weighing sensors.

[0003] First, most rail scales currently on the market use fixed-position load cells. This design means that the load cells are positioned in a fixed location on the track. However, due to various reasons (such as driver operation, uneven track, etc.), trains often cannot stop precisely at the designated position every time. Therefore, there will be a certain deviation between the train's stopping position and the relative position of the load cells, a phenomenon known as "off-center loading." This off-center loading causes uneven force on the load cells, thus affecting the accuracy of the measurement.

[0004] Secondly, in traditional track scale designs, load cells are typically fixedly connected to the scale body. When a train stops and weighing is performed, in addition to the direct impact of the train's weight, the load cells are also subjected to lateral shear forces generated during the train's braking. This lateral shear force, acting on the load cells over a long period, not only reduces their measurement accuracy but also shortens their lifespan. Because the load cells are one of the core components of a track scale, their accuracy and stability directly affect the overall performance and effectiveness of the scale.

[0005] In summary, existing track scales have significant shortcomings in terms of measurement accuracy under off-center loading conditions and the lifespan of the weighing sensors. To address these issues, a novel track scale system needs to be designed that can adapt to train stopping position deviations and reduce the impact of lateral shear forces generated during train braking on the weighing sensors. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide an anti-eccentric load train track scale and its weighing method, which prevents the train track scale from being unbalanced by moving the scale body up and down and the weighing sensor left and right, thereby improving the service life of the track scale and reducing the occurrence rate of random errors.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An anti-eccentric load train track scale includes guide rails, weighing rails disposed between the guide rails, and a weighing device disposed below the weighing rails. The weighing device includes a scale body and screw jacks movably mounted at the four corners below the scale body. A slide rail is provided at the middle position below the scale body. Two weighing sliders are slidably mounted on the slide rail along the length of the weighing rail, and a weighing sensor is provided on the top of the weighing slider for weighing. Two distance sensors are also installed on the side of the weighing rail. The distance sensors and the weighing slider are connected to a control module to coordinate the control of the position of the weighing sensors, thereby achieving the purpose of preventing off-center loading.

[0008] Furthermore, an anti-climb device is provided between the guide rail and the weighing rail. The anti-climb device includes a fixed block and a slider fixedly connected to one end of the fixed block. The fixed block is fixed to the guide rail by welding or screwing away from the slider. A vertical groove is provided on the inner side of the weighing rail to cooperate with the slider, so as to guide the weighing rail to slide up and down.

[0009] Furthermore, both weighing sliders are equipped with lead screws, one end of which is connected to a motor, and the other end of which is fitted with a lead screw bearing.

[0010] Furthermore, the motor is connected to the control module to control the rotation of the lead screw, thereby moving the weighing slider.

[0011] Furthermore, the distance sensor is mounted on the side of the weighing rail via a measuring slide rail to accurately measure the position of the car on the weighing rail and transmit the data to the control module.

[0012] Furthermore, the lifting distance of the screw jack is 3cm to 7cm; A vertical cavity is provided at the top of the screw jack, and vertical guide blocks are provided at the four corners of the scale body to move the scale body vertically on the screw jack.

[0013] On the other hand, the present invention also provides a weighing method for an anti-eccentric load train track scale, which, when using the aforementioned anti-eccentric load train track scale, is characterized by comprising the following steps: S1, Once the carriage on the weighing rail is fixed, the distance sensors at both ends of the moving mechanism determine the position of the carriage center on the weighing rail and transmit the signal to the control module. S2, the control module controls the number of rotations and direction of the motor used to drive the lead screw, thereby controlling the weighing slider to move on the slide rail, so that the center of the two weighing sensors coincides with the center of the carriage; S3, the screw jack drives the scale body, weighing rail and the carriage parked on the weighing rail to descend for weighing. After weighing, the screw jack drives the scale body and weighing rail to rise and send the carriage back to its original position.

[0014] The beneficial effects of this invention are as follows: This invention provides an anti-eccentric load railway track scale and its weighing method. Through an innovative structural design of "vertical movement of the scale body + horizontal movement of the weighing sensor," it fundamentally solves the two core problems of traditional track scales under eccentric load conditions: low measurement accuracy and short lifespan of the weighing sensor. Its specific beneficial effects are as follows: 1. Significantly improves weighing accuracy and reduces random errors. Traditional rail scales suffer from inaccurate measurements because the weighing sensors are fixed in position. Train stopping position deviations (off-center loading) can cause uneven force distribution on the sensors. This invention addresses this by installing two distance sensors on the side of the weighing rail. These sensors detect the center position of the train car in real time via a measuring slide rail and transmit the signal to the control module. The control module automatically drives a motor to move a lead screw, causing the two weighing sliders to slide left and right on the slide rail below the scale until the center of the weighing sensor is completely aligned with the center of the train car. This adaptive alignment mechanism completely eliminates the impact of human-induced stopping deviations on the weighing results, significantly improving measurement accuracy and stability while substantially reducing random errors.

[0015] 2. Effectively extends the service life of weighing sensors and reduces maintenance costs. In traditional designs, the load cells are fixedly connected to the scale body. The lateral shear force generated by train braking acts on the load cells over a long period, leading to decreased accuracy and shortened lifespan. This invention incorporates screw jacks (lifting distance 5cm) at the four corners of the scale body, and uses vertical guide blocks in conjunction with vertical cavities to achieve overall vertical movement of the scale body, weighing rails, and carriage. Before weighing, alignment is achieved using a distance sensor and the weighing slider. During weighing, the screw jacks lower the entire system for measurement, and then it rises back to its original position afterward. This process significantly isolates the lateral shear force generated by braking, preventing it from directly affecting the load cells, thereby significantly extending the sensor's lifespan and reducing the overall maintenance cost of the rail scale.

[0016] 3. Reduce human intervention and improve intelligence and ease of operation. The entire weighing process requires only three automated steps: S1 (distance measurement and positioning), S2 (automatic centering), and S3 (lifting and weighing). These steps are completed by the control module in coordination with the distance measurement sensor, motor, and screw jack, eliminating the need for manual intervention to adjust the sensor position or raise and lower the scale. This not only eliminates the dependence of traditional rail scales on the driver's precise stopping accuracy but also makes operation simpler and safer, making it particularly suitable for high-frequency, continuous weighing scenarios in railway transportation.

[0017] 4. It has a compact and stable structure, and is universally applicable and has good engineering applicability. This invention adds an anti-creep device (fixed block + slider + vertical groove) between the guide rail and the weighing rail, effectively preventing uneven rail gaps caused by longitudinal movement of the weighing rail, while also facilitating installation and disassembly. The entire system employs screw drive, slide rail sliding, and modular control, resulting in a compact structure and small footprint. It is suitable for weighing standard train carriages and can adapt to different train models and load conditions. Whether the anti-creep device is welded or bolted in place, its stability and maintainability are maintained, meeting various railway metering requirements.

[0018] In summary, the technical solution of this invention achieves multiple objectives of "anti-eccentricity, high precision, long life, and easy operation" through intelligent adaptive adjustment and mechanical isolation design. It not only directly improves the measurement performance and reliability of the track scale, but also provides a more efficient and stable solution for cargo weighing in the railway transportation industry.

[0019] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the installation of the ranging sensor of the present invention.

[0021] Reference numerals in the attached drawings: 1. Anti-climb device; 101. Fixing block; 102. Vertical slide rail; 2. Guide rail; 3. Weighing rail; 4. Carriage; 5. Scale body; 51. Vertical guide block; 6. Screw jack; 61. Vertical cavity; 7. Weighing slider; 8. Screw; 9. Screw bearing; 10. Weighing sensor; 11. Motor; 12. Distance sensor; 13. Measuring slide rail; 14. Detailed Implementation

[0022] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0023] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0024] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] Example 1 Please see Figure 1 and Figure 2 This embodiment provides a train track scale for preventing eccentric loading, including guide rails 2, weighing rails 3 disposed between the guide rails 2, and a weighing device disposed below the weighing rails 3.

[0026] An anti-climb device 1 is installed between the guide rail 2 and the weighing rail 3. This anti-climb device 1 includes a fixing block 101 and a slider fixedly connected to one end of the fixing block 101. The end of the fixing block 101 away from the slider is fixed to the guide rail 2 by welding. A vertical groove 102, which cooperates with the slider, is provided on the inner side of the weighing rail 3, thereby guiding the weighing rail 3 to slide smoothly in the vertical direction. This effective anti-climb device 1 can solve the problem of uneven rail gaps caused by longitudinal movement of the rail, and also facilitates the installation and disassembly of the entire device.

[0027] The weighing device includes a scale body 5 and screw jacks 6 movably mounted at the four corners of the scale body 5. The lifting distance of the screw jacks 6 is 5cm. A vertical cavity 61 is provided at the top of the screw jacks 6, and vertical guide blocks 51 are correspondingly provided at the four corners of the scale body 5, allowing the scale body 5 to be vertically positioned on the screw jacks 6. In this way, the scale body 5 can move up and down via the screw jacks 6, and the cooperation between the vertical guide blocks 51 and the vertical cavity 61 ensures the stability and guidance of the scale body 5 during the lifting process, preventing swaying or deviation, and ensuring that the weight of the scale body 5 is entirely supported by the weighing sensors 11 below during weighing, avoiding stress on the screw jacks 6.

[0028] A slide rail 9 is located at the center of the lower part of the weighing body 5. Two weighing sliders 7 are slidably mounted on the slide rail 9 along the length of the weighing rail 3, and a weighing sensor 11 is installed on the top of each weighing slider 7 for weighing. Each weighing slider 7 contains a lead screw 8. One end of the lead screw 8 is connected to a motor 12, and the other end houses a lead screw bearing 10. The motor 12 is connected to a control module and is used to control the rotation of the lead screw 8, thereby driving the weighing slider 7 to move along the length of the weighing rail 3 on the slide rail 9.

[0029] Two distance sensors 13 are also installed on the side of the weighing rail 3. The distance sensors 13 are mounted on the side of the weighing rail 3 via the measuring slide rail 14. They are used to accurately measure the position of the carriage 4 on the weighing rail 3 and transmit the signal to the control module. The distance sensors 13 and the weighing slider 7 are both connected to the control module to coordinate the control of the position of the weighing sensor 11, thereby achieving the purpose of preventing off-center loading.

[0030] When carriage 4 is stopped on weighing rail 3 for weighing operations, follow these steps: S1, after the carriage 4 on the weighing rail 3 is fixed, the distance sensors 13 at both ends move to determine the position of the center of the carriage 4 on the weighing rail 3 and transmit the signal to the control module. This process obtains the actual stopping position of the carriage 4 in real time through the movement of the distance sensors 13 on the measuring slide rail 14, avoiding the problem of uneven loading caused by stopping deviation.

[0031] S2, based on the received position signal, the control module controls the number of rotations and direction of the motor 12 used to drive the lead screw 8, thereby controlling the weighing slider 7 to move on the slide rail 9, so that the centers of the two weighing sensors 11 coincide with the center of the carriage. In this way, the weighing sensors 11 can always be directly below the center of the carriage, ensuring uniform force and improving measurement accuracy.

[0032] S3, the screw jack 6 lowers the weighing body 5, the weighing rail 3, and the carriage 4 parked on the weighing rail 3 for weighing. After weighing, the screw jack 6 raises the weighing body 5 and the weighing rail 3, returning the carriage 4 to its original position. Throughout the descent and ascent, the vertical groove 102 of the anti-climb device 1, in cooperation with the slider, ensures that the weighing rail 3 does not move longitudinally. Simultaneously, the vertical cavity 61 of the screw jack 6, in cooperation with the vertical guide block 51, further reduces the influence of lateral shear force on the weighing sensor 11.

[0033] This embodiment reduces the impact of human factors on weighing results through the above structure and method, significantly improves measurement accuracy and stability, and extends the service life of the weighing sensor.

[0034] Example 2 Please see Figure 1 and Figure 2This embodiment provides an anti-eccentric load train track scale, whose structure is basically the same as that of Embodiment 1. The only difference is that the fixed block 101 in the anti-climb device 1 is fixed to the guide rail 2 by screwing (instead of welding) at the end away from the slider. The structure, connection relationship and parameters of the other components are completely the same, including the lifting distance of the screw jack 6 is still 5cm, and the arrangement of the weighing slider 7, screw 8, motor 12, distance sensor 13, etc. are all the same.

[0035] This screw-on fixing method makes the anti-climb device 1 more convenient to install and maintain. It can also guide the weighing rail 3 to slide up and down and prevent longitudinal movement through the cooperation of the fixing block 101, the slider and the vertical slide groove 102.

[0036] The specific arrangement of the weighing device and its components is as follows: The scale body 5 is movably connected to the vertical cavity 61 at the top of the screw jack 6 via vertical guide blocks 51 at the four corners below; two weighing sliders 7 are slidably installed on the slide rail 9 in the middle below the scale body 5 along the length of the weighing rail 3, and each slider is equipped with a weighing sensor 11 at the top; a screw 8 is inserted inside the weighing slider 7, one end of which is connected to a motor 12, and the other end is equipped with a screw bearing 10, and the motor 12 is controlled by the control module; two distance sensors 13 are installed on the side of the weighing rail 3 via a measuring slide rail 14, and the distance sensors 13 are connected to the control module to coordinate the adjustment of the position of the weighing sliders 7.

[0037] The specific methods and steps for weighing operations are exactly the same as in Example 1: S1, after the carriage 4 on the weighing rail 3 is fixed, the distance measuring sensors 13 at both ends move to determine the position of the center of the carriage 4 on the weighing rail 3 and transmit the signal to the control module.

[0038] S2, the control module controls the number of rotations and direction of the motor 12, drives the lead screw 8 to move the weighing slider 7, and makes the center of the two weighing sensors 11 coincide with the center of the carriage.

[0039] S3, the screw jack 6 drives the scale body 5, weighing rail 3 and carriage 4 to descend for weighing, and then rises back to reset after the weighing is completed.

[0040] In this embodiment, the anti-creep device 1, which is fixed by screws, is the same as the welding method in Embodiment 1. Both methods can effectively prevent uneven rail gaps caused by longitudinal movement of the rail and facilitate installation and disassembly. Under off-center loading conditions, the entire system can still achieve adaptive centering of the position of the weighing sensor 11 through the automatic adjustment of the distance sensor 13 and the weighing slider 7, thereby reducing random errors and improving the service life and weighing accuracy of the rail scale.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A track scale for preventing eccentric loading, comprising guide rails, weighing rails disposed between the guide rails, and a weighing device disposed below the weighing rails, characterized in that: The weighing device includes a scale body and screw jacks movably mounted at the four corners below the scale body. A slide rail is provided at the middle position below the scale body. Two weighing sliders are slidably mounted on the slide rail along the length of the weighing rail, and a weighing sensor is provided on the top of the weighing slider for weighing. Two distance sensors are also installed on the side of the weighing rail. The distance sensors and the weighing slider are connected to a control module to coordinate the control of the position of the weighing sensors, thereby achieving the purpose of preventing off-center loading.

2. The anti-eccentricity train track scale according to claim 1, characterized in that: An anti-climb device is provided between the guide rail and the weighing rail. The anti-climb device includes a fixed block and a slider fixedly connected to one end of the fixed block. The fixed block is fixed to the guide rail by welding or screwing away from the slider. A vertical groove is provided on the inner side of the weighing rail to cooperate with the slider, so as to guide the weighing rail to slide up and down.

3. The anti-eccentricity train track scale according to claim 2, characterized in that: Both weighing sliders are equipped with lead screws, one end of which is connected to a motor, and the other end is equipped with a lead screw bearing.

4. The anti-eccentricity train track scale according to claim 3, characterized in that: The motor is connected to the control module and is used to control the rotation of the lead screw, thereby moving the weighing slider.

5. The anti-eccentricity train track scale according to claim 4, characterized in that: The distance sensor is mounted on the side of the weighing rail via a measuring slide rail to accurately measure the position of the car on the weighing rail and transmit the data to the control module.

6. The anti-eccentricity train track scale according to claim 5, characterized in that: The lifting distance of the screw jack is 3cm~7cm; A vertical cavity is provided at the top of the screw jack, and vertical guide blocks are provided at the four corners of the scale body to move the scale body vertically on the screw jack.

7. A weighing method for an anti-eccentric load train track scale, using an anti-eccentric load train track scale as described in claim 6, characterized in that, Includes the following steps: S1, Once the carriage on the weighing rail is fixed, the distance sensors at both ends of the moving mechanism determine the position of the carriage center on the weighing rail and transmit the signal to the control module. S2, the control module controls the number of rotations and direction of the motor used to drive the lead screw, thereby controlling the weighing slider to move on the slide rail, so that the center of the two weighing sensors coincides with the center of the carriage; S3, the screw jack drives the scale body, weighing rail and the carriage parked on the weighing rail to descend for weighing. After weighing, the screw jack drives the scale body and weighing rail to rise and send the carriage back to its original position.

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