A track circuit polarity cross tester

Abstract

The utility model discloses a track circuit polarity cross test appearance relates to railway signal detection field, and it is including: frame, the frame top fixed mounting has the vertical rod, the vertical rod is away from the frame one side fixed mounting has the handle, the frame top fixed mounting has the frequency shift meter, the frame inside swing mounting has the threaded rod, the threaded rod has the two thread sections of opposite rotation, and two thread sections all screw thread installation have the thread block, the threaded rod one end swing has the knob, the thread block one side is connected with the L shaped board, the L shaped board one side swing mounting has the U shaped board, the U shaped board is used for clamping in the steel rail outside, the U shaped board inside is provided with the test probe, the test probe with steel rail top end abuts, the test probe with frequency shift meter electric connection, the utility model discloses through setting up the vertical rod and handle in the frame top, and the operator need not bend or crouch, only needs to stand and holds the handle to can whole machine stable erection between two steel rails and completes the test.

Description

Technical Field

[0001] This utility model relates to the field of railway signal detection technology, specifically to a track circuit polarity crossover tester. Background Technology

[0002] As a key component of the railway signaling system, the core function of track circuits is to detect whether a track section is occupied by a train. The stability of their working state is directly related to the safety and efficiency of railway transportation. In order to avoid signal interference or misjudgment, the polarity crossover between adjacent track sections must be correct, that is, the power supply polarities of adjacent sections are opposite. Therefore, polarity crossover testing is an important part of track circuit maintenance.

[0003] Currently, the commonly used polarity crossover testing methods rely on frequency shift meters and involve manual handheld test probes touching the rails. During the test, the operator must first measure the voltage values ​​of both rails, then measure the voltage value of one rail. By comparing the voltage value of one rail with the voltage values ​​of the two crossed rails, the operator determines whether the polarity crossover is correct. If the voltage value of one rail is greater than the voltage value of the two crossed rails, the polarity crossover is considered correct; otherwise, it is incorrect. During this test, the operator must squat on the ground for a long time, holding a probe in each hand and keeping them in contact with the rails. The operation is cumbersome and labor-intensive, easily leading to operator fatigue and hindering continuous testing. Furthermore, the instability of manual operation may affect the accuracy of the test results. Utility Model Content

[0004] The purpose of this invention is to provide a track circuit polarity cross-tester to solve the problem of cumbersome operation and inconvenience for continuous testing in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a track circuit polarity crossover tester, comprising:

[0006] A frame is provided, with a vertical pole fixedly installed at its top. A handle is fixedly installed on the side of the vertical pole away from the frame. A frequency shift meter is fixedly installed at the top of the frame. A threaded rod is movably installed inside the frame. The threaded rod has two threaded segments with opposite directions of rotation. Each threaded segment is threaded with a threaded block. A knob is movably connected to one end of the threaded rod. An L-shaped plate is connected to one side of the threaded block. A U-shaped plate is movably installed on one side of the L-shaped plate. The U-shaped plate is used to lock onto the outside of the rail. A test probe is provided inside the U-shaped plate. The test probe abuts against the top of the rail and is electrically connected to the frequency shift meter.

[0007] Furthermore, the two ends of the threaded rod are movably installed inside the frame through bearings, the threaded block slides against the inner wall of the frame, the knob is located on the outside of the frame near the threaded rod, the knob is connected to the shaft of the threaded rod, the outer side of the frame is provided with a scale, and the L-shaped plate is fixedly installed with a pointer on the side near the scale.

[0008] Furthermore, a groove is provided at the top of the U-shaped plate, the test probe is inserted into the groove, and a spring is connected between the groove and the test probe.

[0009] Furthermore, a rotating shaft is movably installed on the side of the L-shaped plate near the U-shaped plate. The rotating shaft is fixedly connected to the U-shaped plate. A gear is fixedly installed on the outside of the rotating shaft. A movable shaft is movably installed on the side of the L-shaped plate near the gear. A rack is fixedly installed on the outside of the movable shaft. The rack is engaged in the tooth groove of the gear.

[0010] Furthermore, two inclined plates are fixedly installed on the L-shaped plate near the rack, and the two inclined plates are symmetrically arranged on both sides of the rack. An elastic element connects the inclined plates to the rack.

[0011] Furthermore, a connector is fixedly installed on the top of the frame near the knob, and a bolt is threaded onto the connector. A V-shaped block is movably installed on the end of the bolt near the knob. The inner wall of the V-shaped block abuts against the outer side of the knob, and the V-shaped block fits against the connector and one side of the frame.

[0012] Compared with the prior art, the track circuit polarity cross tester provided by this utility model, by setting a pole and handle at the top of the frame, allows the operator to stand up and hold the handle to stably set the whole machine between two steel rails to complete the test without bending over or squatting. This effectively avoids muscle fatigue and physical discomfort caused by maintaining a squatting posture for a long time, improves the comfort of operation, and is suitable for high-frequency and long-term continuous on-site testing work.

[0013] The device employs a threaded rod with oppositely rotating threaded sections and a knob structure. Rotating the knob drives the threaded blocks on both sides to move synchronously in opposite directions, thereby causing the U-shaped plate to precisely adjust the spacing. The scale on the outside of the frame works in conjunction with the pointer on the L-shaped plate, allowing for intuitive reading and control of the adjustment distance to adapt to different track gauge requirements. After adjustment, the knob is tightened by a mechanical locking mechanism consisting of bolts and V-blocks, effectively preventing spacing deviation due to vibration or external force during testing and ensuring test consistency.

[0014] The test probe is installed inside the U-shaped plate by a spring. Under the action of elastic preload, it always fits tightly against the top surface of the rail, ensuring a stable and reliable electrical connection. This effectively avoids voltage reading deviations caused by poor contact, vibration, or insufficient pressure of traditional manual probes. At the same time, when testing a single side of the rail, the U-shaped plate can rotate 90° and achieve reliable positioning through an angle self-locking mechanism composed of gears, racks, and elastic elements, preventing angle deflection during the test and further ensuring measurement accuracy. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the dual-track test structure provided in an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the test monorail structure provided in an embodiment of the present utility model;

[0019] Figure 4 This is a schematic diagram of the U-shaped plate installation structure provided in an embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of the test probe mounting structure provided in an embodiment of the present invention;

[0021] Figure 6 This is an enlarged structural diagram of point A provided in an embodiment of the present utility model;

[0022] Figure 7 This is a schematic diagram of the V-shaped block installation structure provided in an embodiment of the present utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Frame; 2. Upright; 3. Handle; 4. Frequency shift meter; 5. Threaded rod; 6. Threaded block; 7. Knob; 8. L-shaped plate; 9. Scale; 10. Pointer; 11. U-shaped plate; 12. Groove; 13. Test probe; 14. Spring; 15. Shaft; 16. Gear; 17. Movable shaft; 18. Rack; 19. Inclined plate; 20. Elastic element; 21. Connector; 22. Bolt; 23. V-block. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] As attached Figure 1 To be continued Figure 7 As shown:

[0027] Example 1:

[0028] This utility model provides a track circuit polarity crossover tester, comprising:

[0029] A frame 1 has a vertical pole 2 fixedly installed at its top. A handle 3 is fixedly installed on the side of the vertical pole 2 away from the frame 1. A frequency shift meter 4 is fixedly installed at the top of the frame 1. A threaded rod 5 is movably installed inside the frame 1. The threaded rod 5 has two threaded segments with opposite directions of rotation. Threaded blocks 6 are threadedly installed on both threaded segments. A knob 7 is movably connected to one end of the threaded rod 5. An L-shaped plate 8 is connected to one side of the threaded block 6. A U-shaped plate 11 is movably installed on one side of the L-shaped plate 8. The U-shaped plate 11 is used to lock onto the outside of the rail. A test probe 13 is set inside the U-shaped plate 11. The test probe 13 abuts against the top of the rail and is electrically connected to the frequency shift meter 4.

[0030] Specifically, the two ends of the threaded rod 5 are movably installed inside the frame 1 via bearings, the threaded block 6 slides against the inner wall of the frame 1, the knob 7 is located on the outside of the frame 1 near the threaded rod 5, the knob 7 is connected to the shaft of the threaded rod 5, the outer side of the frame 1 is provided with a scale 9, the L-shaped plate 8 is fixedly installed with a pointer 10 near the scale 9, the top of the U-shaped plate 11 is provided with a groove 12, the test probe 13 is inserted into the groove 12, and a spring 14 is connected between the inside of the groove 12 and the test probe 13.

[0031] As shown above, the upright 2 is vertically fixed to the top of the frame 1, and its upper end is connected to the handle 3. The operator can stand and hold the handle 3 to stably set up the whole machine above the track, realizing operation without bending over and reducing labor intensity. The frequency shift meter 4 is fixed to the top of the frame 1 and is used to display the voltage value and polarity collected by the test probe 13 in real time. The threaded rod 5 is horizontally inserted inside the frame 1, supported by bearings at both ends, and has two sections of threads with opposite directions in the middle. The knob 7 is set outside the frame 1 and is connected to the threaded rod 5 for transmission. When the knob 7 is rotated, the threaded rod 5 rotates synchronously, driving the threaded blocks 6 on both sides to move synchronously towards or away from each other, thereby adjusting the distance between the U-shaped plates 11 on both sides to adapt to different track gauges. Block 6 is threadedly engaged with threaded rod 5 and slides along the inner wall of frame 1. One end of L-shaped plate 8 is fixedly connected to threaded block 6, and the other end is used to install U-shaped plate 11 to realize the force transmission for spacing adjustment. Scale 9 is marked on the outside of frame 1, and pointer 10 is fixed at the corresponding position of L-shaped plate 8. When adjusting the spacing, the distance between U-shaped plates 11 can be intuitively and accurately controlled by aligning pointer 10 with the value of scale 9. U-shaped plate 11 has an open structure for clamping on the outside of rail. It has a groove 12 on its top. Test probe 13 is inserted into groove 12 and connected to the bottom of groove 12 through spring 14. Spring 14 provides constant elastic force to keep the probe in close contact with the top surface of rail, ensuring reliable electrical contact.

[0032] Specifically, a rotating shaft 15 is movably installed on the side of the L-shaped plate 8 near the U-shaped plate 11. The rotating shaft 15 is fixedly connected to the U-shaped plate 11. A gear 16 is fixedly installed on the outside of the rotating shaft 15. A movable shaft 17 is movably installed on the side of the L-shaped plate 8 near the gear 16. A rack 18 is fixedly installed on the outside of the movable shaft 17. The rack 18 is engaged in the tooth groove of the gear 16. Two inclined plates 19 are fixedly installed on the side of the L-shaped plate 8 near the rack 18. The two inclined plates 19 are symmetrically arranged on both sides of the rack 18. An elastic element 20 connects the inclined plates 19 and the rack 18. A connector 21 is fixedly installed on the top of the frame 1 near the knob 7. A bolt 22 is threaded onto the connector 21. A V-shaped block 23 is movably installed on the end of the bolt 22 near the knob 7. The inner wall of the V-shaped block 23 abuts against the outer side of the knob 7. The V-shaped block 23 fits against the connector 21 and one side of the frame 1.

[0033] As shown above, the rotating shaft 15 is movably mounted on one side of the L-shaped plate 8, with one end fixedly connected to the U-shaped plate 11 and the outer side fixedly connected to the gear 16. When the U-shaped plate 11 is rotated, the rotating shaft 15 drives the gear 16 to rotate synchronously, providing transmission support for angle adjustment. The movable shaft 17 is mounted on the L-shaped plate 8 near the gear 16. The rack 18 is fixed to the outer side of the movable shaft 17 and meshes with the gear 16. Two inclined plates 19 are symmetrically fixed on both sides of the rack 18. The elastic element 20 connects the inclined plates 19 and the rack 18. When the U-shaped plate 11 rotates, the gear 16 pushes the rack 18 to rotate. The movable shaft 17 swings, the elastic element 20 deforms, and after the rotation stops, the elastic element 20 returns to its original position and pushes the rack 18 into the tooth groove of the gear 16, locking the gear 16 and thus fixing the angle of the U-shaped plate 11. The connecting piece 21 is fixed at the top of the frame 1 near the knob 7. The bolt 22 is threadedly connected to the connecting piece 21. The V-block 23 is installed on the end of the bolt 22 near the knob 7 through a bearing. Rotating the bolt 22 can drive the V-block 23 to move up and down. When the inner wall of the V-block 23 abuts against the outer side of the knob 7, the knob 7 is locked by friction, thus fixing the position of the threaded rod 5.

[0034] Working principle: The operator first observes the rail spacing on site, rotates knob 7, which drives threaded rod 5 to rotate. Since threaded rod 5 has two threads with opposite directions of rotation, the threaded blocks 6 on both sides move outward or inward simultaneously, driving L-shaped plate 8 and U-shaped plate 11 to adjust the spacing. By observing the position of pointer 10 on scale 9, the current rail gauge is precisely matched. After adjustment, tighten bolt 22 so that V-shaped block 23 presses against the outer wall of knob 7, achieving mechanical locking and preventing the threaded rod 5 from loosening and causing spacing changes during subsequent operations. The operator stands, holds handle 3, and places the entire machine stably between two rails. The U-shaped plates 11 on both sides naturally engage the rails. Test probe 13 automatically presses against the top surface of the rail under the action of spring 14, forming good electrical contact. At this time, frequency shift meter 4 displays the intersection between the two rails. Record the voltage value. Next, test the voltage of one side of the rail. The operator lifts the U-shaped plate 11 upwards and rotates it 90° around the pivot 15 (perpendicular to the direction of the frame 1 when viewed from above). During the rotation, the gear 16 drives the rack 18 to swing to one side. After the rotation stops, the elastic element 20 pushes the rack 18 to reset and lock into the tooth groove of the gear 16, realizing angle self-locking and ensuring that the U-shaped plate 11 remains vertical and does not spring back. The rotated and locked U-shaped plate 11 is then placed on a single rail. The test probe 13 automatically presses against the top surface of the rail again. The frequency shift meter 4 displays the voltage value of one side. Record this data and compare the two measurement results. If the voltage value of one side of the rail is greater than the voltage value of the double rail crossing, it indicates that the polarity crossing of the adjacent rail sections is correct. Otherwise, the polarity crossing is incorrect and adjustment is required.

[0035] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A track circuit polarity crossover tester, characterized in that, include: A frame (1) is provided with a pole (2) fixedly installed at the top of the frame (1). A handle (3) is fixedly installed on the side of the pole (2) away from the frame (1). A frequency shift meter (4) is fixedly installed at the top of the frame (1). A threaded rod (5) is movably installed inside the frame (1). The threaded rod (5) has two threaded segments with opposite directions of rotation. A threaded block (6) is threadedly installed on both threaded segments. A knob (7) is movably connected to one end of the threaded rod (5). An L-shaped plate (8) is connected to one side of the threaded block (6). A U-shaped plate (11) is movably installed on one side of the L-shaped plate (8). The U-shaped plate (11) is used to be clamped on the outside of the rail. A test probe (13) is provided inside the U-shaped plate (11). The test probe (13) abuts against the top of the rail. The test probe (13) is electrically connected to the frequency shift meter (4).

2. The track circuit polarity crossover tester according to claim 1, characterized in that, The threaded rod (5) is movably mounted inside the frame (1) at both ends via bearings. The threaded block (6) slides against the inner wall of the frame (1). The knob (7) is located on the outside of the frame (1) near the threaded rod (5). The knob (7) is connected to the shaft of the threaded rod (5). The frame (1) has a scale (9) on its outer side. The L-shaped plate (8) has a pointer (10) fixedly mounted on the side near the scale (9).

3. A track circuit polarity cross-tester according to claim 2, characterized in that, The U-shaped plate (11) has a groove (12) at the top inside, and the test probe (13) is inserted into the groove (12). A spring (14) is connected between the groove (12) and the test probe (13).

4. A track circuit polarity crossover tester according to claim 1, characterized in that, A rotating shaft (15) is movably installed on the side of the L-shaped plate (8) near the U-shaped plate (11). The rotating shaft (15) is fixedly connected to the U-shaped plate (11). A gear (16) is fixedly installed on the outside of the rotating shaft (15). A movable shaft (17) is movably installed on the side of the L-shaped plate (8) near the gear (16). A rack (18) is fixedly installed on the outside of the movable shaft (17). The rack (18) is engaged in the tooth groove of the gear (16).

5. A track circuit polarity cross-tester according to claim 4, characterized in that, Two inclined plates (19) are fixedly installed on the side of the L-shaped plate (8) near the rack (18). The two inclined plates (19) are symmetrically arranged on both sides of the rack (18). An elastic element (20) connects the inclined plates (19) and the rack (18).

6. A track circuit polarity crossover tester according to claim 1, characterized in that, A connector (21) is fixedly installed on the top of the frame (1) near the knob (7). A bolt (22) is threaded onto the connector (21). A V-shaped block (23) is movably installed on the bolt (22) near the knob (7). The inner wall of the V-shaped block (23) abuts against the outer side of the knob (7). The V-shaped block (23) fits against the connector (21) and one side of the frame (1).

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