Fixing device for rail transit steel rail vibration acceleration vibration pickup

Abstract

The utility model relates to a rail transit steel rail vibration acceleration vibration pickup fixing device which comprises a sensor, a steel rail connecting part and an insulating base plate, the insulating base plate is detachably installed and fixed below the steel rail connecting part, and the sensor is detachably installed and fixed below the insulating base plate. And the steel rail connecting part is mounted at the bottom of the steel rail in a manner of being matched with the steel rail. According to the utility model, through the cooperative arrangement of the steel rail connecting part, the insulating base plate and the sensor, the sensor and the steel rail can be kept insulated after the sensor is installed and fixed, so that the sensor can be prevented from being broken down by electric conduction of the steel rail; the steel rail connecting part enables the device to be stably and firmly installed and fixed below the steel rail, looseness of the device in the long-term monitoring and using process is avoided, finally, the overall assembly structure is designed to be a symmetrical structure, measurement errors caused by a cantilever beam structure are avoided, and it can be ensured that the test result is accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transit facilities, in particular to a rail transit rail vibration acceleration pickup fixing device. Background Art

[0002] Rail vibration acceleration is an important physical quantity for evaluating the track status. The existing testing method is to adsorb the sensor to the bottom of the rail using a magnetic base, or to glue the sensor to the bottom of the rail using glue. Recently, special devices have also been used to fix the sensor.

[0003] When the magnetic attraction method and the adhesive method are used to fix the sensor, the two methods cannot maintain the stability of the sensor for a long time due to the severe impact and vibration caused by the train passing the measuring point. In addition, the rails also have a conductive reflux function. Therefore, it is found in long-term practice that the sensor is often damaged by large current breakdown.

[0004] For example, in the utility model patent with Chinese patent announcement number CN211475435U, a fixing device for rail acceleration sensor is proposed, which is formed by installing a first connector and a second connector on both sides of the rail, and the first groove and the second groove are respectively clamped on the rail. Under the action of the clamping mechanism, the fixing device is fixed to the rail, and the sensor fixing surface is connected to and carries the acceleration sensor. The defect of this fixing device for rail acceleration sensor is that the sensor is installed at one end to form a cantilever beam, which will cause distortion of the measurement result; and this design also does not consider the problem of current breakdown, which is easy to be damaged; in addition, the longer screw design is also easy to loosen during long-term monitoring. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The utility model provides a rail transit rail vibration acceleration pickup fixing device, which solves the problems that the sensor cannot be stably installed and fixed under the track for a long time and the sensor is more easily broken down by current.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rail transit rail vibration acceleration pickup fixing device, comprising a sensor, a rail connecting part and an insulating pad, wherein the insulating pad is detachably mounted and fixed below the rail connecting part, the sensor is detachably mounted and fixed below the insulating pad, the rail connecting part is installed at the bottom of the rail in cooperation with the rail, wherein the rail connecting part comprises a base, two pressure plates and two anti-loosening bolts, a notch matching the shape of the rail is formed on the top of the base, so that the base is inserted into the bottom of the rail using the notch, the two pressure plates are respectively arranged on opposite sides of the rail, and the two pressure plates and the base are cooperated to clamp the rail, and the two anti-loosening bolts respectively connect and fix the two pressure plates to the base.

[0009] Preferably, the corners of the insulating pad are connected and fixed to the insulating pad and the base by pad fixing bolts.

[0010] In a further embodiment, a through hole penetrating the base is provided at the center of the base, and a sensor fixing bolt passing through the insulating pad and fixing the sensor under the insulating pad is provided in the through hole.

[0011] In a further embodiment, a downwardly extending protective plate is formed around the base, and the protective plate encloses the sensor inside.

[0012] In a further embodiment, the contact surface between the pressure plate and the rail is arranged to be parallel to the bottom of the rail.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides a rail transit rail vibration acceleration pickup fixing device, which has the following beneficial effects:

[0015] 1. In the utility model, the rail connection part, the insulating pad and the sensor are arranged in coordination, so that the sensor and the rail can be insulated after being installed and fixed, thereby preventing the sensor from being broken down by the conductive rail. In addition, the rail connection part can also enable the device to be installed and fixed under the rail more stably and firmly, reducing the looseness of the device during long-term monitoring and use. The overall assembly structure is designed to be a symmetrical structure, avoiding the measurement error introduced by the cantilever beam structure, and ensuring the accuracy of the test results.

[0016] 2. In the present invention, the sensor is located on the center line of the rail, so that the accuracy of measurement can be ensured, and the base is surrounded by a guard plate design to protect the sensor and prevent flying sand and gravel from hitting the sensor and causing damage.

[0017] 3. In the present invention, the contact surface between the pressure plate and the rail is designed to be parallel to the bottom of the rail. On the one hand, the contact area is increased to avoid line contact and ensure firm fixation; on the other hand, it can adapt to various types of rail sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the rail transit rail vibration acceleration pickup fixing device when used in conjunction with the rail according to the implementation plan;

[0019] Figure 2 for Figure 1 A front view of

[0020] Figure 3 It is a schematic diagram of the exploded structure of a rail transit rail vibration acceleration pickup fixing device according to the implementation scheme;

[0021] Figure 4 for Figure 3 Schematic diagram of the combined structure;

[0022] Figure 5 Schematic diagram of the structure of the rail connection part in this embodiment.

[0023] In the figure: 10, rail; 20, rail connection; 21, base; 22, pressure plate; 23, anti-loosening bolt; 30, insulating pad; 31, pad fixing bolt; 40, sensor; 41, sensor fixing bolt. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 and Figure 2 A rail transit rail vibration acceleration pickup fixing device includes a rail connection part 20, an insulating pad 30 and a sensor 40. The rail connection part 20 is installed at the bottom of the rail 10 in cooperation with the rail 10, the insulating pad 30 is detachably installed and fixed below the rail connection part 20, and the sensor 40 is detachably installed and fixed below the insulating pad 30, so that the sensor 40 is installed at the bottom of the rail 10 for detection.

[0026] See also Figure 5The rail connection part 20 includes a base 21, two pressure plates 22 and two anti-loosening bolts 23. A notch matching the shape of the rail 10 is formed on the top of the base 21, so that the base 21 can be inserted into the bottom of the rail 10 by using the notch. The two pressure plates 22 are respectively arranged on the opposite sides of the rail 10, and the contact surface between the pressure plates 22 and the rail 10 can be arranged to be parallel to the bottom of the rail 10, so that after the pressure plates 22 and the base 21 are placed, the two pressure plates 22 can be used to clamp the rail 10 in cooperation with the base 21. The two anti-loosening bolts 23 respectively connect and fix the two pressure plates 22 to the base 21, so that the rail connection part 20 is stably fixed under the rail 10. A downwardly extending guard plate can also be formed around the base 21, so that the guard plate can enclose the sensor 40 on the inside.

[0027] See also Figure 3 and Figure 4 , the end corners of the insulating pad 30 can be connected and fixed to the insulating pad 30 and the base 21 from below by using the pad fixing bolts 31. A through hole penetrating the base 21 is pre-opened at the center of the base 21, and a sensor fixing bolt 41 passing through the insulating pad 30 can be inserted into the through hole. The sensor fixing bolt 41 can be connected and fastened to the sensor 40 after passing through the insulating pad 30, so that the sensor 40 is fixed under the insulating pad 30 and the sensor is on the center line of the rail. In addition, after the sensor fixing bolt 41 is connected, its top is not higher than the top surface of the base 21, so that it can avoid contacting with the bottom surface of the rail 10 for electrical conduction.

[0028] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described one by one here. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A rail transit rail vibration acceleration pickup fixing device, comprising a sensor (40), characterized in that: The invention also comprises a rail connection part (20) and an insulating pad (30), wherein the insulating pad (30) is detachably mounted and fixed below the rail connection part (20), the sensor (40) is detachably mounted and fixed below the insulating pad (30), and the rail connection part (20) is mounted and arranged at the bottom of the rail (10) in cooperation with the rail (10). The rail connection portion (20) comprises a base (21), two pressure plates (22) and two anti-loosening bolts (23); a notch matching the shape of the rail (10) is formed on the top of the base (21), so that the base (21) is inserted into the bottom of the rail (10) by means of the notch; the two pressure plates (22) are respectively arranged on opposite sides of the rail (10), and the two pressure plates (22) and the base (21) are matched to clamp the rail (10); the two anti-loosening bolts (23) respectively connect and fix the two pressure plates (22) to the base (21).

2. A rail transit rail vibration acceleration pickup fixing device according to claim 1, characterized in that: The insulating pad (30) and the base (21) are connected and fixed at the corners of the insulating pad (30) by pad fixing bolts (31).

3. A rail transit rail vibration acceleration pickup fixing device according to claim 1 or 2, characterized in that: A through hole penetrating the base (21) is provided at the center of the base (21), and a sensor fixing bolt (41) passing through the insulating pad (30) and fixing the sensor (40) below the insulating pad (30) is provided in the through hole.

4. A rail transit rail vibration acceleration pickup fixing device according to claim 1, characterized in that: The base (21) is surrounded by a protective plate extending downward, and the protective plate encloses the sensor (40) inside.

5. The rail transit rail vibration acceleration pickup fixing device according to claim 1, characterized in that: The contact surface between the pressing plate (22) and the steel rail (10) is arranged to be parallel to the bottom of the steel rail (10).

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