Self-centering turnout switching resistance sensor

Abstract

The present invention provides a self-centering switch conversion resistance sensor, comprising a cylindrical pin and an induction coil, wherein the induction coil is arranged around the circumference of the cylindrical pin, and when the cylindrical pin is inserted into the pin hole of the fork iron and the action rod, the induction coil is located in the pin hole of the fork iron and / or the pin hole of the action rod; the induction coil has first sections on two side walls opposite to each other along the force sensing direction thereof, respectively, so as to form two force contact areas on the two side walls adjacent to the first sections on the induction coil, and the first sections are perpendicular to the force sensing direction of the induction coil, and when the action rod applies a force to the fork iron, the two force contact areas contact the hole wall of the pin hole of the fork iron and / or the action rod. Thus, the contact area between the induction coil and the hole wall of the fork iron and the pin hole of the action rod is effectively reduced, and under the force of the action rod, the direction of the resultant force of the action rod acting on the fork iron through the cylindrical pin is made to coincide or nearly coincide with the force sensing direction of the induction coil, thereby effectively improving the accuracy of the detection of various conversion resistances of the switch.

Description

Technical Field

[0001] The invention relates to the field of railway maintenance equipment, and in particular to a self-centering turnout conversion resistance sensor. Background Art

[0002] When a railway train is running or entering or leaving a station, it needs to switch to a different track. A switch is set at the track switch, and the switch can be automatically switched through the switch machine to ensure the safe and efficient operation of the train.

[0003] After the turnout has been working for a long time, the switch resistance will increase due to the roadbed or other reasons, while the force of the switch machine is limited. The increase in the turnout resistance will affect the normal operation of the switch machine, and eventually lead to abnormal turnout conversion, affecting driving safety. The turnout conversion includes three processes: unlocking, conversion, and locking. In order to ensure the driving safety of the train, it is necessary to regularly detect various mechanical parameters of the turnout, including the static force in the locked state, the resistance of the turnout during normal conversion, the maximum output force (friction force) of the switch machine, the rebound force of the point rail after unlocking, the friction force of the conversion process, and the card resistance of the conversion process. The values ​​of these mechanical parameters are directly related to the operating conditions of the turnout, and many faults of the turnout are also related to these mechanical parameters. Therefore, by regularly measuring these mechanical parameters to understand and grasp the working conditions of the turnout, and when the turnout conversion resistance exceeds the normal range, the turnout and the roadbed are repaired accordingly to restore the turnout conversion resistance to the normal range.

[0004] At present, the action rod of the switch machine is connected to the fork iron of the turnout to drag the turnout for switching. The action rod is connected to the fork iron through a connecting pin. When detecting the turnout switching resistance, the connecting pin is pulled out and a turnout switching resistance sensor is inserted into the pin hole at the connection between the action rod of the switch machine and the fork iron of the turnout. The shape of the sensor is similar to the connecting pin. The sensor can be used to detect the size of the resistance when the switch machine pulls the turnout.

[0005] The existing switch conversion resistance sensor has a specific force detection direction, which is generally the specific diameter direction of the sensor, and the outer diameter of the induction coil on the sensor is very close to the inner diameter of the pin hole of the action rod or the fork iron, so that it is difficult to achieve point contact between the induction coil and the pin hole of the action rod or the fork iron. In addition, in the actual detection process, due to the shaking of the operator during installation or testing, it is difficult to align the force detection direction of the sensor with the force direction between the action rod and the fork iron. Therefore, there will be a certain deviation in the detected force, which affects the accuracy of the switch conversion resistance detection and ultimately causes wrong judgment of the maintenance workers in the maintenance construction. Summary of the invention

[0006] The main purpose of the present invention is to provide a self-centering turnout conversion resistance sensor to solve the problem that the turnout conversion resistance sensor in the prior art has a detection direction deviation and causes inaccurate detection data.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a self-centering turnout conversion resistance sensor, comprising: a cylindrical pin, used to be inserted into the pin hole of the fork iron of the railway turnout and the pin hole of the action rod of the switch machine; an induction coil, the induction coil is arranged around the circumference of the cylindrical pin, when the cylindrical pin is inserted into the pin hole of the fork iron and the pin hole of the action rod, the induction coil is located in the pin hole of the fork iron and / or the pin hole of the action rod; wherein, the induction coil has first sections on two side walls opposite to each other along the first preset diameter direction to form two force contact areas on the two side walls adjacent to the first section on the induction coil, when the action rod applies a force to the fork iron, the two force contact areas contact the hole wall of the pin hole of the fork iron and / or the action rod; the first preset diameter direction is the force sensing direction of the induction coil, and the first section is perpendicular to the first preset diameter direction.

[0008] Furthermore, there are multiple induction coils, which are spaced apart along the axial direction of the cylindrical pin; wherein, when the cylindrical pin is inserted into the pin holes of the fork iron and the action rod, the multiple induction coils are respectively located in the pin holes of the fork iron and the action rod.

[0009] Furthermore, each induction coil includes a first induction coil; wherein, when the cylindrical pin is inserted into the pin holes of the fork-shaped iron and the action pull rod, the first induction coil is located in the pin hole of the fork-shaped iron.

[0010] Furthermore, each induction coil also includes a second induction coil; wherein, when the cylindrical pin is inserted into the pin hole of the fork iron and the action pull rod, the second induction coil is located in the pin hole of the action pull rod;

[0011] Furthermore, there are two first induction coils and one second induction coil; wherein the second induction coil is located between the two first induction coils.

[0012] Furthermore, the induction coil has second cross-sections on two opposite side walls along its second preset diameter direction, the second preset diameter direction is perpendicular to the first preset diameter direction, and the second cross-section is perpendicular to the second preset diameter direction; wherein the two force contact areas are located on the side wall of the induction coil between each first cross-section and two adjacent second cross-sections.

[0013] Furthermore, the self-centering turnout conversion resistance sensor also includes: a handle portion, which is arranged at the first end of the cylindrical pin. When the cylindrical pin is inserted into the pin holes of the fork iron and the action rod, the lower end surface of the handle portion abuts against the upper end surface of the fork iron to locate the axial position of the cylindrical pin.

[0014] Furthermore, the self-centering turnout conversion resistance sensor also includes: a magnet block, which is arranged on the lower end surface of the handle part. When the cylindrical pin is inserted into the pin holes of the fork iron and the action rod, the magnet block is adsorbed on the upper surface of the fork iron to locate the circumferential position of the cylindrical pin.

[0015] Furthermore, there are multiple magnet blocks, and the multiple magnet blocks are divided into two groups: wherein the handle portion is cylindrical, and the two groups of magnet blocks are symmetrically arranged along the diameter direction of the handle portion.

[0016] Furthermore, a locking pin hole is provided at the second end of the cylindrical pin, and the locking pin hole is provided along the diameter direction of the cylindrical pin.

[0017] The self-centering turnout conversion resistance sensor using the technical solution of the present invention comprises a cylindrical pin and an induction coil, wherein the cylindrical pin is used to be inserted into the pin hole of the fork iron of the railway turnout and the pin hole of the action rod of the switch machine; the induction coil is arranged around the circumference of the cylindrical pin, and when the cylindrical pin is inserted into the pin hole of the fork iron and the pin hole of the action rod, the induction coil is located in the pin hole of the fork iron and / or the pin hole of the action rod; wherein the induction coil has first sections on two side walls opposite to each other along the first preset diameter direction to form two force contact areas on the two side walls adjacent to the first section on the induction coil, the first preset diameter direction is the force sensing direction of the induction coil, the first section is perpendicular to the first preset diameter direction, and when the action rod applies a force to the fork iron, the two force contact areas contact the hole walls of the pin hole of the fork iron and / or the action rod. Thereby, the contact area between the induction coil and the pin hole of the fork iron and the hole wall of the pin hole of the action rod is effectively reduced. Under the action force of the action rod, the direction of the resultant force of the two force contact areas acting on the hole wall of the pin hole of the fork iron and / or the action rod coincides or nearly coincides with the force sensing direction of the induction coil, so that the direction of the resultant force of the action rod acting on the fork iron through the cylindrical pin coincides or nearly coincides with the force sensing direction of the induction coil, realizing the self-centering function of the induction coil. Effectively improve the accuracy of the detection of various conversion resistances of the turnout. Solve the problem that the turnout conversion resistance sensor in the prior art has a detection direction deviation and causes inaccurate detection data. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 is a schematic cross-sectional structural diagram of an optional self-centering turnout switching resistance sensor according to an embodiment of the present invention, installed in a pin hole of a fork iron of a railway turnout and a pin hole of an actuating pull rod of a switch machine; and

[0020] Figure 2It is a side structural schematic diagram of an optional self-centering turnout switching resistance sensor according to an embodiment of the present invention, installed in a pin hole of a fork iron of a railway turnout and a pin hole of an actuating pull rod of a switch machine;

[0021] Figure 3 is a schematic diagram of the distribution structure of a first section of a first embodiment of a self-centering turnout conversion resistance sensor that can be selected according to an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of the distribution structure of a first section of a second embodiment of a self-centering turnout conversion resistance sensor that can be selected according to an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of the distribution structure of the second section of the first embodiment of the self-centering turnout conversion resistance sensor that can be selected according to an embodiment of the present invention; and

[0024] Figure 6 1 is a schematic diagram of the distribution structure of the second section of the second embodiment of the self-centering turnout conversion resistance sensor which is optional according to the embodiment of the present invention.

[0025] The above drawings include the following reference numerals:

[0026] 10. Cylindrical pin; 11. Locking pin hole; 20. Induction coil; 21. First induction coil; 22. Second induction coil; 23. First section; 24. Force contact area; 25. Second section; 30. Fork iron; 40. Action rod; 50. Handle; 60. Magnet block. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] According to the self-centering turnout switching resistance sensor of the embodiment of the present invention, Figures 1 to 4As shown, it includes a cylindrical pin 10 and an induction coil 20, the cylindrical pin 10 is used to be inserted into the pin hole of the fork iron 30 of the railway turnout and the pin hole of the action rod 40 of the switch machine; the induction coil 20 is arranged around the circumference of the cylindrical pin 10, and when the cylindrical pin 10 is inserted into the pin hole of the fork iron 30 and the pin hole of the action rod 40, the induction coil 20 is located in the pin hole of the fork iron 30 and / or the pin hole of the action rod 40; wherein, the induction coil 20 has first sections 23 on two side walls opposite to each other along its first preset diameter direction to form two force contact areas 24 on the two side walls adjacent to the first section 23 on the induction coil 20, the first preset diameter direction is the force sensing direction of the induction coil 20, the first section 23 is perpendicular to the first preset diameter direction, and when the action rod 40 applies a force to the fork iron 30, the two force contact areas 24 contact with the hole walls of the pin hole of the fork iron 30 and / or the action rod 40. Thereby, the contact area between the induction coil 20 and the pin hole of the fork iron 30 and the hole wall of the pin hole of the action rod 40 is effectively reduced. Under the action of the action rod 40, the direction of the resultant force of the two force contact areas 24 acting on the hole wall of the pin hole of the fork iron and / or the action rod coincides or nearly coincides with the force sensing direction of the induction coil, so that the direction of the resultant force of the action rod 40 acting on the fork iron 30 through the cylindrical pin 10 coincides or nearly coincides with the force sensing direction of the induction coil 20, realizing the self-centering function of the induction coil 20. Effectively improve the accuracy of the detection of various conversion resistances of the turnout. Solve the problem that the turnout conversion resistance sensor in the prior art has a detection direction deviation and causes inaccurate detection data.

[0029] In a specific implementation, there are multiple induction coils 20, and the multiple induction coils 20 are spaced apart along the axial direction of the cylindrical pin 10 and the spacing between two adjacent induction coils 20 is equal: wherein, when the cylindrical pin 10 is inserted into the pin holes of the fork iron 30 and the action rod 40, the multiple induction coils 20 are respectively located in the pin holes of the fork iron 30 and the action rod 40, thereby detecting the switching resistance of the turnout through multiple points.

[0030] Specifically, each induction coil 20 includes a first induction coil 21 and a second induction coil 22. There are two first induction coils 21 and one second induction coil 22. The second induction coil 22 is located between the two first induction coils 21. When the cylindrical pin 10 is inserted into the pin holes of the fork iron 30 and the actuating rod 40, the two first induction coils 21 are respectively located in the two pin holes of the fork iron 30, and the second induction coil 22 is located in the pin hole of the actuating rod 40; thereby, the acting force between the fork iron 30 and the first induction coil 21 and between the actuating rod 40 and the second induction coil 22 is detected to obtain the switching resistance of the turnout.

[0031] In practical applications, such as Figures 3 to 6As shown, the first cut surface 23 is processed on both first induction coils 21, and the second induction coil 22 may or may not be processed with the first cut surface 23. The processing of the first cut surface 23 on each induction coil 20 can further improve the accuracy of the detection of various conversion resistances of the turnout. The first cut surface 23 can be a plane, or a curved surface or a wavy surface that is concave toward the inside of the cylindrical pin 10.

[0032] Furthermore, if Figures 3 to 6 As shown, the induction coil 20 has second sections 25 on two side walls opposite to each other along the second preset diameter direction, the second preset diameter direction is perpendicular to the first preset diameter direction, and the second section 25 is perpendicular to the second preset diameter direction; wherein, the two force contact areas 24 on both sides of the first section 23 are located on the side wall of the induction coil 20 between each first section 23 and two adjacent second sections 25. By machining the second section 25 on the induction coil 20, the force contact area 24 is concentrated in the narrow area between the first section 23 and the second section 25, so that when the action rod 40 applies force to the fork iron 30, the contact area between the two force contact areas 24 and the hole wall of the pin hole of the fork iron 30 and the action rod 40 is further reduced, so that each induction coil 20 can better realize self-centering, and finally the force direction of the action rod 40 coincides with the force sensing direction of the induction coil 20 or is as close to coincide as possible, thereby improving the accuracy of the detection of various conversion resistances of the turnout.

[0033] In practical applications, such as Figures 3 to 6 As shown, the two first induction coils 21 are processed with second cut surfaces 25, and the second induction coil 22 may or may not be processed with the second cut surface 25. Processing the second cut surface 25 on each induction coil 20 can further improve the accuracy of the detection of various switching resistances of the turnout.

[0034] Furthermore, the self-centering turnout switching resistance sensor further includes a handle portion 50, which is a cylindrical shell structure, and is disposed at the first end of the cylindrical pin 10. An electronic component is disposed in the handle portion 50, and a signal line of the detection instrument is connected to the handle portion 50 and is connected to the electronic component in the handle portion 50. When the cylindrical pin 10 is inserted into the pin hole of the fork iron 30 and the action pull rod 40, the lower end surface of the handle portion 50 abuts against the upper end surface of the fork iron 30, thereby locating the axial position of the cylindrical pin 10, and then locating each induction coil 20 to a predetermined detection position.

[0035] In addition, the handle portion 50 is cylindrical. In order to quickly locate the circumferential position of the cylindrical pin 10 when inserting the cylindrical pin 10, the self-centering turnout conversion resistance sensor also includes a magnet block 60, and the magnet block 60 is a plurality of pairs, and each pair of magnet blocks 60 is arranged on the lower end surface of the handle portion 50. The two magnets of each pair of magnet blocks 60 have opposite polarities, that is, one is an N pole and the other is an S pole, so that each pair of magnet blocks 60 has the maximum magnetism. The magnet blocks 60 of this embodiment are two pairs, and the two pairs of magnet blocks 60 are symmetrically arranged along the diameter direction of the handle portion 50, so that the adsorption force is balanced. When the cylindrical pin 10 is inserted into the pin hole of the fork iron 30 and the action pull rod 40, each pair of magnet blocks 60 can be adsorbed on the upper surface of the fork iron 30 to locate the circumferential position of the cylindrical pin 10, so that the force sensing direction of each induction coil 20 and the force direction of the action pull rod 40 are as close to overlap as possible.

[0036] In addition, in order to insert the cylindrical pin 10 into the pin holes of the fork iron 30 and the action rod 40 and further stabilize the circumferential position of each induction coil 20, the lower end surface of the handle portion 50 is processed into a rough surface, thereby increasing the friction resistance with the upper surface of the fork iron 30, preventing the cylindrical pin 10 from rotating at will, and ensuring the accurate position of each induction coil 20.

[0037] Furthermore, a locking pin hole 11 is provided at the second end of the cylindrical pin 10, and the locking pin hole 11 is provided along the diameter direction of the cylindrical pin 10. When the cylindrical pin 10 is inserted into the pin holes of the fork iron 30 and the action rod 40, the locking pin is inserted into the locking pin hole 11 to prevent the cylindrical pin 10 from accidentally falling out of the pin holes of the fork iron 30 and the action rod 40.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-centering turnout switching resistance sensor, characterized in that: include: A cylindrical pin (10) is used to be inserted into a pin hole of a fork iron (30) of a railway turnout and a pin hole of an actuating pull rod (40) of a switch machine; an induction coil (20), the induction coil (20) being arranged around the circumference of the cylindrical pin (10), and when the cylindrical pin (10) is inserted into the pin hole of the fork-shaped iron (30) and the pin hole of the action pull rod (40), the induction coil (20) is located in the pin hole of the fork-shaped iron (30) and / or the pin hole of the action pull rod (40); The induction coil (20) has first cut surfaces (23) on two side walls opposite to each other along a first preset diameter direction, so as to form two force contact areas (24) on two side walls adjacent to the first cut surfaces (23) on the induction coil (20); when the action rod (40) applies a force to the fork-shaped iron (30), the two force contact areas (24) contact the hole wall of the pin hole of the fork-shaped iron (30) and / or the action rod (40); The first preset diameter direction is the force sensing direction of the induction coil (20), and the first section (23) is perpendicular to the first preset diameter direction.

2. The self-centering turnout switching resistance sensor according to claim 1, characterized in that: There are a plurality of induction coils (20), and the plurality of induction coils (20) are arranged at intervals along the axial direction of the cylindrical pin (10); When the columnar pin (10) is inserted into the pin holes of the fork-shaped iron (30) and the action rod (40), the plurality of induction coils (20) are respectively located in the pin holes of the fork-shaped iron (30) and the action rod (40).

3. The self-centering turnout switching resistance sensor according to claim 2, characterized in that: Each of the induction coils (20) comprises a first induction coil (21); When the columnar pin (10) is inserted into the pin holes of the fork-shaped iron (30) and the action pull rod (40), the first induction coil (21) is located in the pin hole of the fork-shaped iron (30).

4. The self-centering turnout switching resistance sensor according to claim 3, characterized in that: Each of the induction coils (20) further comprises a second induction coil (22); When the columnar pin (10) is inserted into the pin holes of the fork iron (30) and the actuating rod (40), the second induction coil (22) is located in the pin hole of the actuating rod (40).

5. The self-centering turnout switching resistance sensor according to claim 4, characterized in that: There are two first induction coils (21) and one second induction coil (22); Wherein, the second induction coil (22) is located between the two first induction coils (21).

6. The self-centering turnout switching resistance sensor according to claim 1, characterized in that: The induction coil (20) has second cut surfaces (25) on two side walls opposite to each other along a second preset diameter direction, the second preset diameter direction is perpendicular to the first preset diameter direction, and the second cut surface (25) is perpendicular to the second preset diameter direction; Wherein, two force contact areas (24) are located on the side wall of the induction coil (20) between each of the first cut surfaces (23) and two adjacent second cut surfaces (25).

7. The self-centering turnout switching resistance sensor according to claim 1, characterized in that: The self-centering turnout conversion resistance sensor also includes: The handle portion (50) is arranged at the first end of the cylindrical pin (10). When the cylindrical pin (10) is inserted into the pin holes of the fork iron (30) and the action rod (40), the lower end surface of the handle portion (50) abuts against the upper end surface of the fork iron (30) to locate the axial position of the cylindrical pin (10).

8. The self-centering turnout switching resistance sensor according to claim 7, characterized in that: The self-centering turnout conversion resistance sensor also includes: The magnet block (60) is arranged on the lower end surface of the handle portion (50). When the columnar pin (10) is inserted into the pin holes of the fork-shaped iron (30) and the action pull rod (40), the magnet block (60) is adsorbed on the upper surface of the fork-shaped iron (30) to locate the circumferential position of the columnar pin (10).

9. The self-centering turnout switching resistance sensor according to claim 8, characterized in that: The magnet blocks (60) are multiple pairs; The handle portion (50) is cylindrical, and each pair of magnet blocks (60) is arranged at intervals along the circumference of the handle portion (50).

10. The self-centering turnout switching resistance sensor according to claim 7, characterized in that: A locking pin hole (11) is provided at the second end of the cylindrical pin (10), and the locking pin hole (11) is provided along the diameter direction of the cylindrical pin (10).

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