A longitudinal measuring device for the amount of sand in a railcar sand box

Abstract

This utility model relates to the field of sand box quantity detection technology, and discloses a longitudinal measuring device for sand box quantity in a railcar. The device includes a housing, with a slide rail fixedly mounted on the inner surface of the housing. A material leakage groove is formed at the lower end of the slide rail. A lifting motor is fixedly installed at the upper end of the slide rail, and a lifting rod is fixedly connected to the lower end of the output shaft of the lifting motor. In this longitudinal measuring device for sand box quantity in a railcar, the lifting rod and the sliding block are connected by a threaded connection. Compared to traditional belt drive, this avoids the problem of travel calculation deviation caused by belt slippage, ensuring the accuracy of the sliding block's lifting movement. Simultaneously, the lifting motor is fixedly installed at the upper end of the slide rail, away from the sand accumulation area at the bottom of the sand box. Combined with a sealed corrugated pipe and dust cover, it prevents sand dust from entering the transmission components, effectively avoiding drive mechanism jamming caused by sand accumulation, and improving the stability and reliability of the drive system.

Description

Technical Field

[0001] This utility model relates to the field of sand box quantity detection technology, specifically a longitudinal measuring device for sand box quantity in a rail train. Background Technology

[0002] During the operation of rail trains, the sand box is a key safety component. The quartz sand stored inside is mainly used to increase the friction between the wheel and rail by spreading sand on the rail surface during train braking, climbing, or running in rainy or snowy weather, so as to prevent wheel slippage and ensure the stability and safety of train operation. Therefore, real-time and accurate monitoring of the amount of sand in the sand box is crucial. Insufficient sand will directly lead to a decrease in the wheel-rail adhesion coefficient, causing safety hazards such as extended braking distance and insufficient climbing power, and may even cause train accidents. Currently, sand quantity detection in railcar sand boxes mainly relies on two methods: The first is manual inspection, where staff need to periodically stop the train, open the sand box cover, and determine the sand quantity through visual observation or by probing with a rod-like tool. This method not only requires interrupting train operation, making it inefficient, but is also heavily influenced by subjective human judgment, resulting in significant measurement errors. Furthermore, it cannot achieve real-time dynamic monitoring of sand quantity, making it difficult to handle sudden decreases in sand quantity during operation. The second method involves existing automatic detection devices. Although some devices attempt to detect sand quantity by setting fixed sensors, they suffer from several technical drawbacks: firstly, fixed sensors can only detect sand at a specific height, failing to achieve comprehensive detection. Continuous quantitative measurement of sand quantity can only determine whether the sand quantity is below the threshold, but cannot obtain the specific sand quantity value. On the other hand, the sand particles in the sand box are granular, which are prone to generating dust during the bumpy operation of the train. This dust adheres to the sensor surface, leading to a decrease in detection accuracy or even sensor failure. In addition, the drive mechanism of some devices uses belt drive to move the detection element, which is prone to deviation in stroke calculation due to belt slippage. Or, because the motor is located at the bottom of the sand box, the drive mechanism may be blocked due to the accumulation of sand particles at the bottom. Furthermore, some detection elements are in direct contact with sand particles for a long time, which can easily cause wear and tear due to particle friction, shortening the service life and increasing maintenance costs. In summary, existing sand box sand quantity detection technologies cannot simultaneously achieve continuous and accurate measurement, structural reliability, and component durability, thus failing to meet the efficient and safe operation requirements of rail trains. Therefore, there is an urgent need for a longitudinal sand quantity measurement device with a reasonable installation layout, high transmission accuracy, and strong detection reliability to solve the problems of low measurement efficiency, poor accuracy, and easy equipment failure in existing technologies, so as to realize real-time continuous monitoring and accurate calculation of sand quantity and ensure the safe operation of rail trains. Utility Model Content

[0003] The purpose of this utility model is to provide a longitudinal measuring device for sand volume in a sand box of a rail train, so as to solve the problems mentioned in the background art, such as low measurement efficiency, poor accuracy, easy equipment failure, inability to balance continuous and accurate measurement, structural reliability and component durability, and difficulty in meeting the needs of efficient and safe operation of rail trains.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a longitudinal measuring device for sand volume in a track train sand box, comprising a box body, a slide rail fixedly arranged on the inner surface of the box body, and a material leakage groove opened at the lower end of the slide rail, a lifting motor fixedly installed at the upper end of the slide rail, and a lifting rod fixedly connected to the lower end of the output shaft of the lifting motor, a sliding block installed on the outer surface of the lifting rod, a sealing corrugated pipe arranged inside the slide rail outside the lifting rod, and a dust cover arranged on one side of the outer surface of the slide rail, and an installation plate fixedly arranged on the outer surface of the sliding block; An angle motor is fixedly installed at one end of the mounting plate facing the outside of the slide rail, and a rotating plate is fixedly connected to one end of the output shaft of the angle motor. A sliding first telescopic plate is installed inside the rotating plate, and a sliding second telescopic plate is installed inside the first telescopic plate. A sliding pressure plate is installed on the outer surface of the second telescopic plate, and a pressure sensor is fixedly installed inside the second telescopic plate. A support surface is provided at one end of the mounting plate.

[0005] Preferably, the lifting rod and the sliding block are threaded together, and the upper and lower surfaces of the sliding block are fixedly connected to the sealing bellows.

[0006] By adopting the above technical solution, the threaded connection method, compared with the traditional belt drive, can avoid the problem of travel calculation deviation caused by belt slippage, ensuring the accuracy of the sliding block's up and down movement along the lifting rod. This makes the position control of the measuring device more accurate when the sand box moves longitudinally. At the same time, the sliding block is fixedly connected to the sealing bellows. During the movement of the sliding block, the sealing bellows expands and contracts accordingly, which can effectively prevent sand particles and dust in the sand box from entering the slide rail. This avoids dust from causing wear and interference to the lifting rod and the sliding block transmission components, ensuring the stable operation of the device and extending the service life of the equipment.

[0007] Preferably, one end of the mounting plate penetrates the outer surface of the slide rail, and both the upper and lower surfaces of the mounting plate are fixedly connected to the dust cover.

[0008] By adopting the above technical solution, the mounting plate and the dust cover are fixedly connected, which can further enhance the protection of the mounting plate and the angle motor, rotating plate and other components installed on it, effectively block the sand particles and dust in the sand box, reduce the corrosion of the detection components by dust, reduce the probability of component failure due to dust, and ensure the long-term stable operation of the measuring device.

[0009] Preferably, the lower surface of the rotating plate is in contact with the upper surface of the mounting plate, and a groove is provided on the inner surface of the rotating plate, and the rotating plate is slidably connected to the first telescopic plate through the groove.

[0010] Using the above technical solution, the sliding groove on the inner side of the rotating plate is slidably connected to the first telescopic plate, so that the first telescopic plate can slide flexibly inside the rotating plate. By driving the rotating plate to rotate and the first telescopic plate to slide through the angle motor, the detection requirement of the pressure plate facing the sand surface in the center of the sand box can be achieved.

[0011] Preferably, the inner surface of the first telescopic plate is provided with a groove, and the first telescopic plate is slidably connected to the second telescopic plate through the groove.

[0012] By adopting the above technical solution, the first telescopic plate and the second telescopic plate are slidably connected by a groove, which can accurately control the contact position between the pressure plate and the sand surface, so that the pressure plate can more accurately sense the pressure of the sand surface, thereby improving the accuracy of sand quantity measurement.

[0013] Preferably, a spring is connected between the pressure plate and the second telescopic plate, and the outer surface of the pressure plate is in contact with one end of the pressure sensor, and the pressure plate protrudes from the outer surface of the second telescopic plate.

[0014] With the above technical solution, the spring between the pressure plate and the second telescopic plate acts as a buffer. When the pressure plate contacts the sand surface, it can prevent rigid collisions from damaging the pressure sensor and the pressure plate, thus extending the service life of the components. The pressure plate is in close contact with the pressure sensor, which can accurately transmit the pressure generated by contacting the sand surface to the pressure sensor, ensuring the accuracy of pressure sensing. The pressure plate protrudes from the outer surface of the second telescopic plate, making it easier for the pressure plate to contact the sand surface. It can also be retracted when not in use, reducing friction and wear with sand particles, and further improving the reliability and durability of the measuring device.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the longitudinal measuring device for sand volume in the sand box of the railcar: 1. The lifting rod and sliding block are connected by threads, which avoids the problem of travel calculation deviation caused by belt slippage compared with the traditional belt drive method, and ensures the accuracy of the lifting and lowering movement of the sliding block. At the same time, the lifting motor is fixedly installed at the upper end of the slide rail, away from the sand accumulation area at the bottom of the sand box. With the help of the sealed bellows and dust cover, it prevents sand and dust from entering the transmission components, effectively avoiding the drive mechanism jamming failure caused by sand accumulation, and improving the stability and reliability of the drive system. 2. In terms of measurement accuracy and continuity, the rotating plate is driven by an angle motor. Combined with the sliding structure of the first and second telescopic plates, the pressure plate can flexibly contact the sand surface at different heights and positions. When the pressure plate contacts the sand surface, the pressure sensor senses the pressure change. The drive module calculates the amount of sand in the sand box by subtracting the slider stroke from the total height of the sand box based on the movement height of the sliding block driven by the lifting rod. This achieves real-time continuous monitoring and precise quantitative measurement of the amount of sand, making up for the shortcomings of existing fixed sensors that can only detect sand surfaces at specific heights and cannot obtain specific sand quantity values. 3. A spring connects the pressure plate and the second telescopic plate, which provides a certain buffer when the pressure plate contacts the sand surface, reducing the rigid friction between the detection element and the sand particles. In addition, the pressure plate protrudes from the outer surface of the second telescopic plate and can be retracted when not in use, further reducing the wear of the detection element by the sand particles, extending the service life of the pressure sensor and other detection elements, and reducing equipment maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the connection between the box body, slide rail and material discharge trough of this utility model; Figure 3 This is a three-dimensional structural diagram of the connection between the lifting rod, sliding block, and sealing bellows of this utility model; Figure 4 This is a three-dimensional structural diagram of the connection between the sliding block, mounting plate, and angle motor of this utility model; Figure 5 This is a three-dimensional structural diagram of the connection between the rotating plate, the first telescopic plate, and the second telescopic plate of this utility model. Figure 6 This is a three-dimensional structural diagram of the first telescopic plate, the second telescopic plate, and the pressure plate of this utility model in their working state.

[0017] In the diagram: 1. Box body; 2. Slide rail; 3. Material discharge chute; 4. Lifting motor; 5. Lifting rod; 6. Sliding block; 7. Sealed bellows; 8. Dust cover; 9. Mounting plate; 10. Angle motor; 11. Rotating plate; 12. First telescopic plate; 13. Second telescopic plate; 14. Pressure plate; 15. Pressure sensor; 16. Support surface. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-6 This utility model provides a technical solution: a longitudinal measuring device for sand volume in a track train sand box.

[0020] Example 1: This example discloses: a box body 1, a slide rail 2 fixedly installed on the inner surface of the box body 1, and a material leakage groove 3 opened at the lower end of the slide rail 2, a lifting motor 4 fixedly installed at the upper end of the slide rail 2, and a lifting rod 5 fixedly connected to the lower end of the output shaft of the lifting motor 4, a sliding block 6 installed on the outer surface of the lifting rod 5, a sealing bellows 7 installed inside the slide rail 2 outside the lifting rod 5, and a dust cover 8 installed on one side of the outer surface of the slide rail 2, and a mounting plate 9 fixedly installed on the outer surface of the sliding block 6; The lifting rod 5 and the sliding block 6 are connected by threads, and the upper and lower surfaces of the sliding block 6 are fixedly connected to the sealing bellows 7. One end of the mounting plate 9 penetrates the outer surface of the slide rail 2, and both the upper and lower surfaces of the mounting plate 9 are fixedly connected to the dust cover 8. When it is necessary to measure the amount of sand in the sand box of the railcar, the lifting motor 4 inside the box 1 is started, and its output shaft drives the lifting rod 5 to rotate. Since the lifting rod 5 and the sliding block 6 are connected by threads, the rotation of the lifting rod 5 will cause the sliding block 6 to move up and down along the lifting rod 5 in the slide rail 2. During the movement of the sliding block 6, the sealing bellows 7 fixedly connected to its upper and lower surfaces will expand and contract accordingly. The sealing bellows 7 can effectively prevent sand particles and dust in the sand box from entering the interior of the slide rail 2, avoiding affecting the normal transmission between the lifting rod 5 and the sliding block 6. On the other hand, it can also prevent foreign objects from entering and ensure the operational stability of the device. Mounting plate 9 is fixed to the outer surface of sliding block 6, with one end penetrating the outer surface of slide rail 2. The upper and lower surfaces of mounting plate 9 are fixedly connected to dust cover 8. Dust cover 8 further enhances the protection of the device and reduces the impact of sand and dust on mounting plate 9 and subsequent connecting parts. The material leakage trough 3 at the lower end of slide rail 2 allows a small amount of sand that accidentally enters slide rail 2 to be discharged through the material leakage trough 3, preventing sand accumulation from affecting the operation of the device. Through the coordinated work of lifting motor 4, lifting rod 5, sliding block 6, sealing bellows 7, dust cover 8, slide rail 2, and material leakage trough 3, the measuring device can move stably along the longitudinal direction of the sand box, providing basic motion support for subsequent sand quantity detection.

[0021] Example 2: This example is based on Example 1: An angle motor 10 is fixedly installed on one end of the mounting plate 9 facing the outside of the slide rail 2, and a rotating plate 11 is fixedly connected to one end of the output shaft of the angle motor 10. A sliding first telescopic plate 12 is installed inside the rotating plate 11, and a sliding second telescopic plate 13 is installed inside the first telescopic plate 12. A sliding pressure plate 14 is installed on the outer surface of the second telescopic plate 13, and a pressure sensor 15 is fixedly installed inside the second telescopic plate 13. A support surface 16 is provided at one end of the mounting plate 9. The lower surface of the rotating plate 11 is in contact with the upper surface of the mounting plate 9, and a sliding groove is provided on the inner surface of the rotating plate 11. The rotating plate 11 is slidably connected to the first telescopic plate 12 through the sliding groove. The inner surface of the first telescopic plate 12 is provided with a sliding groove, and the first telescopic plate 12 is slidably connected to the second telescopic plate 13 through the sliding groove. A spring is connected between the pressure plate 14 and the second telescopic plate 13, and the outer surface of the pressure plate 14 is in contact with one end of the pressure sensor 15, and the pressure plate 14 protrudes from the outer surface of the second telescopic plate 13. When the sliding block 6 moves the mounting plate 9 to the appropriate position, the angle motor 10 starts, and its output shaft drives the rotating plate 11 to rotate. The sliding groove on the inner side of the rotating plate 11 cooperates with the first telescopic plate 12, so that the first telescopic plate 12 can slide in the rotating plate 11. The inner side of the first telescopic plate 12 is also provided with a sliding groove, which cooperates with the second telescopic plate 13, so that the second telescopic plate 13 can slide in the first telescopic plate 12. Through the extension and retraction adjustment of the first telescopic plate 12 and the second telescopic plate 13, when the rotating plate 11 rotates and is in contact with the inclined support surface 16, the first telescopic plate 12 and the second telescopic plate 13 can slide out under the action of gravity, so that the pressure plate 14 can move to the middle position of the box 1 to measure the highest point of the material. The spring connecting the pressure plate 14 and the second telescopic plate 13 provides the pressure plate 14 with a certain buffering capacity when it contacts the sand surface. When the pressure plate 14 contacts the sand surface inside the sand box, it is displaced by the resistance of the sand surface, compresses the spring, and transmits the pressure to the pressure sensor 15. After sensing the pressure change, the pressure sensor 15 transmits the signal to the drive module. The drive module, in conjunction with the lifting motor 4, drives the sliding block 6 to move its height. By subtracting the sliding block's travel from the total height of the sand box, the amount of sand in the sand box can be accurately calculated.

[0022] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A longitudinal measuring device for sand volume in a sand box of a railcar, comprising a box body (1), wherein a slide rail (2) is fixedly provided on the inner surface of the box body (1), and a material leakage groove (3) is provided at the lower end of the slide rail (2), characterized in that: A lifting motor (4) is fixedly installed at the upper end of the slide rail (2), and a lifting rod (5) is fixedly connected to the lower end of the output shaft of the lifting motor (4). A sliding block (6) is installed on the outer surface of the lifting rod (5). A sealing bellows (7) is provided inside the slide rail (2) on the outer side of the lifting rod (5), and a dust cover (8) is provided on one side of the outer surface of the slide rail (2). A mounting plate (9) is fixedly provided on the outer surface of the sliding block (6).

2. The longitudinal measuring device for sand quantity in a railcar sand box according to claim 1, characterized in that: An angle motor (10) is fixedly installed on one end of the mounting plate (9) facing the outside of the slide rail (2), and a rotating plate (11) is fixedly connected to one end of the output shaft of the angle motor (10). A sliding first telescopic plate (12) is installed inside the rotating plate (11), and a sliding second telescopic plate (13) is installed inside the first telescopic plate (12). A sliding pressure plate (14) is installed on the outer surface of the second telescopic plate (13), and a pressure sensor (15) is fixedly installed inside the second telescopic plate (13). A support surface (16) is opened at one end of the mounting plate (9).

3. The longitudinal measuring device for sand quantity in a railcar sand box according to claim 1, characterized in that: The lifting rod (5) and the sliding block (6) are threaded together, and the upper and lower surfaces of the sliding block (6) are fixedly connected to the sealing bellows (7).

4. The longitudinal measuring device for sand quantity in a railcar sand box according to claim 1, characterized in that: One end of the mounting plate (9) penetrates the outer surface of the slide rail (2), and both the upper and lower surfaces of the mounting plate (9) are fixedly connected to the dust cover (8).

5. The longitudinal measuring device for sand quantity in a railcar sand box according to claim 2, characterized in that: The lower surface of the rotating plate (11) is in contact with the upper surface of the mounting plate (9), and the inner surface of the rotating plate (11) is provided with a sliding groove, and the rotating plate (11) is slidably connected to the first telescopic plate (12) through the sliding groove.

6. The longitudinal measuring device for sand quantity in a railcar sand box according to claim 2, characterized in that: The inner surface of the first telescopic plate (12) is provided with a sliding groove, and the first telescopic plate (12) is slidably connected to the second telescopic plate (13) through the sliding groove.

7. The longitudinal measuring device for sand quantity in a railcar sand box according to claim 2, characterized in that: A spring is connected between the pressure plate (14) and the second telescopic plate (13), and the outer surface of the pressure plate (14) is in contact with one end of the pressure sensor (15), and the pressure plate (14) protrudes from the outer surface of the second telescopic plate (13).

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