Turnout switch rail close attachment and separation monitoring device

Abstract

The utility model discloses a turnout switch rail close attachment and separation monitoring device, which is arranged at a switch rail transfer position, and comprises an induction module fixedly arranged on a switch rail of a rail, the induction module comprises a magnetic induction element, and the magnetic induction element is static relative to the switch rail and moves along with the switch rail; the magnetic induction element is used for generating a magnetic field and acting on the induction section position of the displacement sensor; the measuring module is fixedly arranged on a stock rail of the track, the measuring module comprises a displacement sensor, and the displacement sensor is static relative to the stock rail and moves together with the stock rail; and the measuring module is used for measuring the relative position change of the magnetic field generated by the magnetic induction element at the induction section of the displacement sensor. The device is simple in structure, easy to assemble and high in environmental adaptability, can effectively resist the influence of thermal expansion and cold contraction of the track on the measurement result, and has the characteristics of non-contact, high precision, interference resistance and moderate cost.

Description

Technical Field

[0001] The utility model relates to the technical field of railway signals, in particular to a switch point rail close contact and repulsion monitoring device. Background Art

[0002] As an important component of railway signaling, turnouts have complex structures, changeable states, and numerous diseases, making them a weak link in high-speed locomotive operation. As the main moving object during turnout operation, the point rail is affected by the dynamic force and temperature difference during train operation, and its lateral and longitudinal gaps relative to the base rail often change. Once the size of the turnout gap exceeds the standard, it will not only limit the speed of the train passing the turnout, aggravate the vibration of the train, and reduce the comfort of the train passing through the turnout, but may even cause the line to be closed, resulting in the wrong direction of the train or the train derailing, endangering the safety of train operation. Therefore, the key parameters for turnout monitoring and control are the close fit value and repulsion value during the fixed / reverse locking, as well as the dynamic displacement changes during the train passing and turnout conversion.

[0003] The switch close fit detection devices include indirect detection of switch machine indicator rod gap, eddy current displacement detection, fiber or grating displacement detection, image-based displacement detection, and magnetostrictive effect-based displacement detection. Among them, the indirect detection device of switch machine indicator rod gap is that the indicator rod gap is designed inside the switch machine, and the indicator rod and the connecting rod of the external point rail are both active connections, which will have a connection gap. The crawling of the point rail causes the axis of the point rail to deviate from the axial direction of the switch machine indicator rod, which will also bring additional gap offset. In this way, the switch machine indicator rod gap can only be reflected indirectly, and it is difficult to accurately indicate the close fit of the turnout; the eddy current displacement detection device has the disadvantages of short detection distance, inability to detect the opening, and being easily affected by electromagnetic interference; the fiber or grating displacement detection device adopts contact type, which will be affected by the quality of the project, and the detection equipment cost accounts for a high proportion, making it difficult to promote and apply; the image-based direct displacement detection device is easily affected by a variety of harsh environments (such as light, dust, rain, snow, etc.), and it is difficult to meet the requirements of all-weather application on site.

[0004] Therefore, the above existing turnout close contact detection devices have the problems of complex monitoring structure, difficult assembly, low environmental adaptability, difficulty in accurately indicating the close contact degree of the turnout, and poor anti-interference ability. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the monitoring structure of the above existing turnout close contact detection is complex, not easy to assemble, not highly adaptable to the environment, difficult to accurately indicate the close contact degree of the turnout, and poor anti-interference ability. The purpose of the utility model is to provide a turnout point rail close contact and repulsion monitoring device, which is not only simple in structure and easy to assemble, but also highly adaptable to the environment, can effectively resist the influence of thermal expansion and contraction of the track on the measurement result, and has the characteristics of non-contact, high precision, anti-interference, and moderate cost. The utility model is particularly suitable for turnout point rail close contact and repulsion monitoring.

[0006] The utility model is realized by the following technical solutions:

[0007] A switch point rail close contact and repulsion monitoring device, the monitoring device is installed at the position where the base rail changes to the switch point rail, the monitoring device comprises:

[0008] The sensing module is fixedly arranged on the point rail of the track, and the sensing module includes a magnetic sensing element, which is stationary relative to the point rail and moves with the point rail; the magnetic sensing element is used to generate a magnetic field and act on the sensing section position of the displacement sensor;

[0009] The measuring module is fixedly arranged on the basic rail of the track. The measuring module includes a displacement sensor. The displacement sensor is stationary relative to the basic rail and moves with the basic rail. The measuring module is used to measure the relative position change of the magnetic field generated by the magnetic induction element in the induction section of the displacement sensor.

[0010] As a further preference, the sensing module further includes a mounting plate, the magnetic sensing element and the mounting plate are connected by screws, and the mounting plate is connected to the point rail by screws.

[0011] As a further preference, the magnetic induction element is an induction magnet.

[0012] As a further preferred embodiment, the measuring module further comprises a pressing plate, a first rail holding member, a connecting shaft, a second rail holding member and a cover plate which are arranged in sequence;

[0013] The first rail holding member and the second rail holding member are connected by a connecting shaft, and the two rail holding members are fixed on the basic rail of the track; one end of the connecting shaft contacts the cover plate, and the other end of the connecting shaft is prevented from loosening by combining a double nut and a cotter pin, and fixes various parts passing through the connecting shaft; the pressure plate and the cover plate are clearance-matched with the inner walls of the two rail holding members; the displacement sensor is arranged below the cover plate.

[0014] As a further preferred embodiment, the measuring module further comprises a compression spring, which is arranged inside the rail holding member, and sleeved on the connecting shaft, and the two ends of the compression spring are respectively pressed against the inner bottom surface of the rail holding member and the end surfaces of the pressure plate and the cover plate;

[0015] When the two rail holding parts move axially, the compression spring will be compressed. This is because there are limiters at both ends, and the pressure plates and cover plates at both ends of the connecting shaft are relatively static; that is, when the basic rail expands and contracts due to heat, the two rail holding parts move along with the basic rail in the axial direction, and tighten or relax the compression spring accordingly; the two rail holding parts are displaced relative to the compression spring, while the displacement between the end faces of the pressure plate and the cover plate remains unchanged, and the displacement sensor installed on the cover plate is relatively static, that is, the displacement sensor will not be displaced due to the thermal expansion and contraction of the basic rail, thereby ensuring the accuracy of the measurement.

[0016] As a further preference, the rail holding member includes an installation inclined surface and a rail holding member bottom surface, and the installation inclined surface is completely in contact with the inclined surface of the base rail.

[0017] As a further preference, the displacement sensor is a non-contact measurement, and the displacement sensor adopts a magnetostrictive displacement sensor.

[0018] As a further preference, the displacement sensor includes a sensing section, a mounting section, a collection section and a cable. The mounting section is used to mount the entire displacement sensor on the cover plate. A cable is provided on the right side of the collection section for outputting the collection signal.

[0019] As a further preference, the magnetic sensing element is located above the displacement sensor.

[0020] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0021] The utility model discloses a switch point rail close contact and repulsion monitoring device, which includes a sensing module and a measuring module. The sensing module is fixed to the switch point rail by screws, and a magnet is used as a magnetic sensing element. The measuring module is provided with an elastic element to ensure that the measuring element will not be displaced due to the thermal expansion and contraction of the track. Compared with the prior art, the switch point rail close contact and repulsion monitoring device provided by the utility model is not only simple in structure and easy to assemble, but also has high environmental adaptability, can effectively resist the influence of the thermal expansion and contraction of the track on the measurement result, and has the characteristics of non-contact, high precision, anti-interference, and moderate cost. It is particularly suitable for switch point rail close contact and repulsion monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0023] Figure 1 It is a schematic diagram of the structure of a switch point rail close contact and repulsion monitoring device of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the sensing module of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the measurement module of the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the rail holding member of the utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the magnetostrictive displacement sensor of the utility model.

[0028] Reference numerals and corresponding component names:

[0029] A-sensing module; B-measuring module; 1-magnetic induction element; 2-mounting plate; 31-first track holding member; 32-second track holding member; 4-pressure plate; 5-compression spring; 6-connecting shaft; 7-cover plate; 8-displacement sensor; 301-mounting slope, 302-bottom surface of track holding member; 801-sensing section, 802-mounting section, 803-collection section, 804-cable. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0031] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those skilled in the art that these specific details are not necessary to implement the present invention. In other examples, in order to avoid obscuring the present invention, well-known structures, circuits, materials or methods are not specifically described.

[0032] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention.

[0034] Example

[0035] like Figures 1 to 5 As shown, the utility model is a switch point rail close contact repulsion monitoring device, which is installed at the position where the basic rail changes to the point rail in the switch; the monitoring device includes a sensing module A and a measuring module B; the sensing module A is installed on the point rail of the track, and the sensing module A includes a magnetic sensing element 1 and a mounting plate 2; the measuring module B is installed on the basic rail of the track, and the measuring module B includes a pressing plate 4, a first rail holding member 31, a connecting shaft 6, a second rail holding member 32, a cover plate 7 and a displacement sensor 8;

[0036] like Figure 1 and Figure 2 As shown, the magnetic induction element 1 and the mounting plate 2 are connected by screws, and the mounting plate 2 is connected to the point rail by screws; the magnetic induction element 1 is stationary relative to the point rail and moves with the point rail; the magnetic induction element 1 is used to generate a magnetic field and act on the sensing section position of the displacement sensor 8; in this embodiment, the magnetic induction element 1 adopts an induction magnet.

[0037] like Figure 3 As shown, the displacement sensor 8 is stationary relative to the basic rail and moves with the basic rail; the first rail holding member 31 and the second rail holding member 32 are connected by a connecting shaft 6, and the two rail holding members are fixed on the basic rail of the track; one end of the connecting shaft 6 is in contact with the cover plate 7, and the other end of the connecting shaft 6 is prevented from loosening by combining a double nut and a cotter pin, and fixes various parts passing through the connecting shaft 6; the pressure plate 4 and the cover plate 7 are clearance-matched with the inner walls of the two rail holding members; the displacement sensor 8 is arranged below the cover plate 7. The measuring module B is used to measure the relative position change of the magnetic field generated by the magnetic induction element 1 in the sensing section of the displacement sensor 8 when the pointed rail is relatively close to or away from the basic rail.

[0038] As a further implementation, Figure 3 As shown, the measuring module B also includes a compression spring 5, which is arranged inside the rail holding member 3, and the compression spring 5 is sleeved on the connecting shaft 6, and the two ends of the compression spring 5 are respectively pressed against the inner bottom surface of the rail holding member 3 and the end surfaces of the pressure plate 4 and the cover plate 7;

[0039] The pressure plate 4 and the cover plate 7 are clearance-matched with the inner walls of the two rail-holding parts, and the connecting shaft 6 is limited by a nut. When the two rail-holding parts move axially, the compression spring 5 will be compressed. Due to the limitation at both ends, the pressure plate 4 and the cover plate 7 at both ends of the connecting shaft 6 are relatively static; that is, when the basic rail expands and contracts, the two rail-holding parts move along the axis with the basic rail, and compress or relax the compression spring 5 accordingly; the two rail-holding parts are displaced relative to the compression spring 5, but the displacement between the end faces of the pressure plate 4 and the cover plate 7 remains unchanged, and the compression spring 5 is limited by the end faces of the pressure plate 4 and the cover plate 7, ensuring that the pressure plate 4 and the cover plate 7 will not be displaced due to the thermal expansion and contraction of the basic rail, and the displacement sensor 8 installed on the cover plate 7 is relatively static, that is, the displacement sensor will not be displaced due to the thermal expansion and contraction of the basic rail, ensuring the accuracy of the measurement.

[0040] As a further implementation, Figure 4 As shown, the rail holding member includes an installation inclined surface 301 and a rail holding member bottom surface 302, and the installation inclined surface 301 is completely in contact with the inclined surface of the base rail.

[0041] As a further implementation, the displacement sensor 8 is a non-contact measurement, and the displacement sensor 8 adopts a magnetostrictive displacement sensor. Specifically, Figure 5 As shown, the displacement sensor 8 includes a sensing section 801, a mounting section 802, a collection section 803 and a cable 804;

[0042] The induction section 801 is used to sense the magnetic field signal emitted by the magnetic induction element 1;

[0043] The acquisition section 803 is used to acquire the position information of the magnetic field signal sensed by the sensing section 801 on the sensing section;

[0044] The mounting section 802 is used to mount the entire displacement sensor 8 on the cover plate 7;

[0045] A cable 804 is provided on the right side of the acquisition section 803 for outputting the acquisition signal.

[0046] In the utility model, the displacement sensor 8 is installed on the base rail, and the displacement sensor 8 is a non-contact measurement; the magnetic induction element 1 is installed on the point rail. The displacement sensor 8 is connected to the rail holding member through the thread on the mounting section 802, that is, the displacement sensor 8 is stationary relative to the base rail and moves with the base rail. The magnetic induction element 1 is installed on the mounting plate 2 and is fixed to the point rail through the mounting plate 2. The magnetic induction element 1 is stationary relative to the point rail and moves with the point rail. The position change of the base rail and the point rail is converted into the relative position change of the displacement sensor 8 and the magnetic induction element 1. In terms of spatial position, the magnetic induction element 1 is installed above the displacement sensor 8 and is in the induction section 801 of the sensor 8.

[0047] The base rail and the point rail on the turnout must maintain a certain standard clearance value to ensure the safe operation of the locomotive. If the clearance value is smaller than the standard clearance value, it is close contact, and the point rail will squeeze the base rail; if the clearance value is larger than the standard clearance value, it is repelled, and the locomotive is at risk of derailment, thus realizing the close contact and repelling monitoring of the turnout point rail.

[0048] Compared with the prior art, the monitoring device of the utility model is not only simple in structure and easy to assemble, but also has high environmental adaptability, can effectively resist the influence of thermal expansion and contraction of the track on the measurement results, and has the characteristics of non-contact, high precision, anti-interference and moderate cost. It is particularly suitable for the monitoring of the close contact and repulsion of the turnout point rail.

[0049] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A switch point rail close contact and repulsion monitoring device, characterized in that: The monitoring device is installed at the position where the base rail changes to the point rail in the turnout, and the monitoring device includes: The sensing module (A) is fixedly arranged on the point rail of the track, the sensing module (A) comprising a magnetic sensing element (1), the magnetic sensing element (1) being stationary relative to the point rail and moving with the point rail; the magnetic sensing element (1) is used to generate a magnetic field and act on the sensing section position of the displacement sensor (8); A measuring module (B) is fixedly arranged on a base rail of the track, the measuring module (B) comprising a displacement sensor (8), the displacement sensor (8) being stationary relative to the base rail and moving together with the base rail; the measuring module (B) is used to measure the relative position change of the magnetic field generated by the magnetic sensing element (1) in the sensing section of the displacement sensor (8); The measuring module (B) further comprises a pressing plate (4), a first rail-holding member (31), a connecting shaft (6), a second rail-holding member (32) and a cover plate (7) which are arranged in sequence; The first rail holding member (31) and the second rail holding member (32) are connected via a connecting shaft (6), and the two rail holding members are fixed on the basic rail of the track; one end of the connecting shaft (6) contacts the cover plate (7), and the other end of the connecting shaft (6) is prevented from loosening by combining a double nut and a cotter pin, and fixes various parts passing through the connecting shaft (6); the pressure plate (4) and the cover plate (7) are clearance-matched with the inner walls of the two rail holding members; and the displacement sensor (8) is arranged below the cover plate (7).

2. A switch point rail close contact and repulsion monitoring device according to claim 1, characterized in that: The sensing module (A) further comprises a mounting plate (2), the magnetic sensing element (1) and the mounting plate (2) being connected via screws, and the mounting plate (2) being connected to the pointed rail via screws.

3. A switch point rail close contact and repulsion monitoring device according to claim 1, characterized in that: The magnetic induction element (1) is an induction magnet.

4. A switch point rail close contact and repulsion monitoring device according to claim 1, characterized in that: The measuring module (B) further comprises a compression spring (5), wherein the compression spring (5) is arranged inside the rail holding member (3), the compression spring (5) is sleeved on the connecting shaft (6), and the two ends of the compression spring (5) are respectively pressed against the inner bottom surface of the rail holding member (3) and the end surfaces of the pressure plate (4) and the cover plate (7); When the two rail holding members move in the axial direction, the compression spring (5) is compressed, and the pressure plate (4) and the cover plate (7) at both ends of the connecting shaft (6) are relatively stationary; that is, when the basic rail expands and contracts due to heat, the two rail holding members move along with the basic rail in the axial direction, and correspondingly tighten or loosen the compression spring (5); the two rail holding members are displaced relative to the compression spring (5), while the displacement between the end faces of the pressure plate (4) and the cover plate (7) remains unchanged, and the displacement sensor (8) installed on the cover plate (7) is relatively stationary.

5. A switch point rail close contact and repulsion monitoring device according to claim 1, characterized in that: The rail holding member comprises a mounting bevel (301) and a rail holding member bottom surface (302), and the mounting bevel (301) is completely in contact with the bevel of the base rail.

6. A switch point rail close contact and repulsion monitoring device according to claim 1, characterized in that: The displacement sensor (8) is a non-contact measurement device.

7. A switch point rail close contact and repulsion monitoring device according to claim 6, characterized in that: The displacement sensor (8) is a magnetostrictive displacement sensor.

8. A switch point rail close contact and repulsion monitoring device according to claim 1, characterized in that: The displacement sensor (8) comprises a sensing section (801), a mounting section (802), a collection section (803) and a cable (804); the mounting section (802) is used to mount the entire displacement sensor (8) on the cover plate (7); and a cable (804) is provided on the right side of the collection section (803) for outputting a collection signal.

9. A switch point rail close contact and repulsion monitoring device according to claim 1, characterized in that: The magnetic sensing element (1) is located above the displacement sensor (8).

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