Novel rail transit tunnel wall vibration acceleration sensor fixing device

Abstract

The utility model relates to a novel rail transit tunnel wall vibration acceleration sensor fixing device, which comprises a base, an insulating spacer and a protective cover, the insulating spacer is arranged at the top of the base, the insulating spacer and the base are detachably and fixedly connected, the sensor is arranged above the insulating spacer, and the protective cover is arranged above the sensor. The insulating spacer is arranged on the base, the sensor is fixedly connected with the base, an opening is formed in the lower portion of the protective cover, the protective cover is placed on the base, the insulating spacer and the sensor are arranged in the protective cover in a covering mode through the opening, and the protective cover is detachably and fixedly connected with the base. According to the utility model, through the arrangement of the insulating spacer and the protective cover, when the sensor is installed and used on the base, the insulating spacer can be utilized to ensure that the sensor is prevented from being influenced by stray current, and the protective cover can also be utilized to ensure that the sensor is prevented from being influenced by water splashing, so that the stability of installation and use of the sensor is improved.

Description

Technical Field

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

[0002] Tunnel wall vibration acceleration is a physical quantity used to evaluate track status, vibration reduction effect, rail transit vibration source strength and other information. The existing testing method is to fix the sensor on a right-angle base and then stick the base on the tunnel wall for testing.

[0003] For example, in the utility model patent with Chinese patent announcement number CN219694490U, a vibration acceleration detection tooling is proposed, which uses cast iron material to weld the tooling body into one piece, and can provide support for the acceleration sensor. For example, in the utility model patent with Chinese patent announcement number CN219493630U, a support device for a rail transit tunnel wall vibration sensor is proposed, and by setting a height adjustment pad on the support frame, the height of the sensor can be adjusted to support it on the support frame.

[0004] The above-mentioned defects of the supporting facilities for the vibration acceleration sensor of the rail transit tunnel wall are: 1. Due to the violent vibration caused by the passing of trains, and the frequency is high, the base is easily attached to the track wall and fixed, which causes safety hazards; 2. The sensor is directly fixed on the base and will be affected by the stray current of the tunnel wall, causing sensor damage or affecting the measurement signal; 3. The cable has no dedicated fixed position or the fixing design is too complicated, which may cause the data cable close to the sensor to be not fixed firmly, thereby causing signal drift; 4. There is no protective cover design, which may easily cause the sensor to be affected by splashing water when the tunnel wall is regularly flushed or when water seeps into the tunnel wall. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] The utility model provides a novel fixing device for a rail transit tunnel wall vibration acceleration sensor, which solves the problems raised in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of rail transit tunnel wall vibration acceleration sensor fixing device, including a base, an insulating gasket and a protective cover, the insulating gasket is arranged on the top of the base, and the two are detachably fixedly connected, the sensor is arranged above the insulating gasket, and the sensor is connected and fixedly connected to the base, an opening is formed below the protective cover, the protective cover is placed on the base, and the protective cover uses its opening to arrange the insulating gasket and the sensor cover inside, and the protective cover is detachably fixedly connected to the base.

[0009] Preferably, a plurality of track wall fixing holes penetrating the side wall of the base are formed on the side of the base facing the track wall, and a backing adhesive is coated on the side of the base facing the track wall. The base also includes expansion bolts whose number is equal to the number of the track wall fixing holes. The base is connected and fixed to the track wall by means of the expansion bolts passing through the track wall fixing holes. A central fixing hole matching with the sensor is formed at the center of the top of the base, and a plurality of insulating gasket fixing holes matching with insulating gaskets and a plurality of protective cover fixing holes matching with the protective cover are also formed on the top of the base.

[0010] It is further preferred that the insulating gasket is formed with first base connecting holes, the number of which is equal to the number of the insulating gasket fixing holes, the first base connecting holes pass through the insulating gasket, and the plurality of first base connecting holes are respectively longitudinally aligned with the plurality of insulating gasket fixing holes on the base, and a sensor fixing hole passing through the insulating gasket is also formed at the center of the insulating gasket, and the sensor fixing hole is longitudinally aligned with the central fixing hole on the base.

[0011] It is further preferred that the bottom of the protective cover is formed with second base connection holes whose number is equal to the number of the protective cover fixing holes, the second base connection holes penetrate the protective cover, and the plurality of second base connection holes are respectively longitudinally aligned with the plurality of protective cover fixing holes on the base.

[0012] It is further preferred that a data line guide groove communicating with the inner cavity of the second base connection hole is formed at the bottom of the outer wall thereof, and the data line of the sensor passes through the data line guide groove. At least one data line fixing hole is also formed on the side of the base, and a cable tie for binding the sensor data line is passed through the data line fixing hole.

[0013] (III) Beneficial effects

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

[0015] 1. In the utility model, by providing the insulating gasket and the protective cover, when the sensor is installed and used on the base, the insulating gasket can be used to protect the sensor from the influence of stray current, and the protective cover can be used to protect the sensor from the influence of splashing water, thereby improving the stability of the installation and use of the sensor.

[0016] 2. In the utility model, the base and the track wall are connected and fixed by expansion bolts and adhesive, so that after the base is installed, point discontinuity between the base and the track wall can be avoided, and at the same time, the base can maintain a long-term stable connection with the track wall, so that the base can be used to better support the use of the sensor.

[0017] 3. In the utility model, by providing the data line guide groove on the protective cover and the data line fixing hole on the base, the data line of the sensor can be firmly fixed, thereby reducing signal drift. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a novel rail transit tunnel wall vibration acceleration sensor fixing device according to the implementation scheme;

[0019] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the new rail transit tunnel wall vibration acceleration sensor fixing device;

[0020] Figure 3 for Figure 1 Schematic diagram of the exploded structure of the new rail transit tunnel wall vibration acceleration sensor fixing device at another angle.

[0021] In the figure: 10, base; 11, track wall fixing hole; 12, insulating gasket fixing hole; 13, center fixing hole; 14, protective cover fixing hole; 15, data line fixing hole; 20, insulating gasket; 21, first base connection hole; 22, sensor fixing hole; 30, protective cover; 31, second base connection hole; 32, data line guide groove. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figures 1 to 3, a new type of rail transit tunnel wall vibration acceleration sensor fixing device, a base 10, an insulating gasket 20 and a protective cover 30. The base 10 can be installed and fixed on the track wall. The insulating gasket 20 is arranged on the top of the base 10, and the insulating gasket 20 can be removably fixed to the base 10 by fasteners such as bolts. The sensor is arranged above the insulating gasket 20, and the sensor and the base 10 can be fixed by bolts. The protective cover 30 is placed on the base 10, and an opening is formed below the protective cover 30, and the protective cover 30 can protect the insulating gasket 20 and the sensor shield in the inner cavity of the protective cover 30 by using the opening. Fasteners such as bolts can be used between the protective cover 30 and the base 10 so that the protective cover 30 can be removably fixed to the base 10.

[0024] In this embodiment, a plurality of track wall fixing holes 11 penetrating the side wall of the base 10 are formed on the side of the base 10 facing the track wall. The track wall fixing holes 11 can be set to various shapes such as U-shaped holes. When installing the base 10, it can be fixed using expansion bolts including expansion tubes and bolts. During installation, holes can be drilled in advance at the corresponding installation positions of the track wall and expansion tubes can be inserted. Then, multiple bolts can be used to pass through each track wall fixing hole 11 respectively, and the installation and fixation can be completed after the bolts are screwed into the expansion tubes and tightened. The side of the base 10 facing the track wall can be coated with adhesive before it is installed and fixed. The adhesive can be made of a medium such as quick-drying cement, quick-adhesive powder, AB glue, etc. The adhesive can be used to make the base 10 fit completely with the tunnel wall. A central fixing hole 13 that matches the sensor is formed at the top center of the base 10. The top of the base 10 is also formed with a plurality of insulating gasket fixing holes 12 that match the insulating gasket 20 and a plurality of protective cover fixing holes 14 that match the protective cover 30. Internal threads can be pre-set on the inner walls of the insulating gasket fixing holes 12 and the protective cover fixing holes 14.

[0025] In this embodiment, the insulating gasket 20 is formed with first base connection holes 21, the number of which is equal to the number of insulating gasket fixing holes 12, and the first base connection holes 21 penetrate the insulating gasket 20. When installing the insulating gasket 20, the multiple first base connection holes 21 can be longitudinally aligned with the multiple insulating gasket fixing holes 12 on the base 10, and then the installation can be completed by passing the bolts through the first base connection holes 21 and tightening with the insulating gasket fixing holes 12. A sensor fixing hole 22 penetrating the insulating gasket 20 is also formed at the center of the insulating gasket 20. After the insulating gasket 20 is placed and installed, the sensor fixing hole 22 can be longitudinally aligned with the central fixing hole 13 on the base 10. After the construction personnel place the sensor on the insulating gasket 20, they can use bolts to pass through the central fixing hole 13 and the sensor fixing hole 22 and tighten with the bottom of the sensor to complete the installation and fixation of the sensor. The insulating gasket 20 as a whole can be processed with insulating materials (such as resin, PVC, etc.).

[0026] In this embodiment, the bottom of the protective cover 30 is formed with second base connection holes 31, the number of which is equal to the number of the protective cover fixing holes 14, and the second base connection holes 31 penetrate the protective cover 30. When installing the protective cover 30, the plurality of second base connection holes 31 can be longitudinally aligned with the plurality of protective cover fixing holes 14 on the base 10, and then bolts can be passed through the second base connection holes 31 and tightened with the protective cover fixing holes 14 to complete the installation. The bottom of the outer wall of the second base connection hole 31 is also formed with a data line guide groove 32 that communicates with its inner cavity, and the data line of the sensor can pass through the data line guide groove 32.

[0027] In this embodiment, at least one data cable fixing hole 15 is formed on the side of the base 10 , and the data cable passing through the data cable guide groove 32 can be bound to the outside of the base 10 using a cable tie passing through the data cable fixing hole 15 .

[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 novel rail transit tunnel wall vibration acceleration sensor fixing device, comprising a base (10), characterized in that: The invention also comprises an insulating gasket (20) and a protective cover (30), wherein the insulating gasket (20) is arranged on the top of the base (10), and the two are detachably fixedly connected, the sensor is arranged above the insulating gasket (20), and the sensor and the base (10) are connected and fixedly connected, an opening is formed below the protective cover (30), the protective cover (30) is placed on the base (10), and the insulating gasket (20) and the sensor cover are arranged inside the protective cover (30) by using the opening, and the protective cover (30) and the base (10) are detachably fixedly connected.

2. According to claim 1, a novel rail transit tunnel wall vibration acceleration sensor fixing device is characterized in that: A plurality of track wall fixing holes (11) penetrating the side wall of the base (10) are formed on the side of the base (10) facing the track wall, a central fixing hole (13) matching with the sensor is formed at the center of the top of the base (10), and a plurality of insulating gasket fixing holes (12) matching with the insulating gasket (20) and a plurality of protective cover fixing holes (14) matching with the protective cover (30) are also formed at the top of the base (10).

3. The novel rail transit tunnel wall vibration acceleration sensor fixing device according to claim 2 is characterized in that: The side of the base (10) facing the track wall is coated with adhesive, and the base (10) also includes expansion bolts whose number is equal to the number of track wall fixing holes (11). The base (10) is connected and fixed to the track wall by means of the expansion bolts passing through the track wall fixing holes (11).

4. A novel rail transit tunnel wall vibration acceleration sensor fixing device according to claim 2 or 3, characterized in that: The insulating gasket (20) is formed with first base connection holes (21) whose number is equal to the number of insulating gasket fixing holes (12); the first base connection holes (21) penetrate the insulating gasket (20), and a plurality of the first base connection holes (21) are respectively longitudinally aligned with a plurality of insulating gasket fixing holes (12) on the base (10); a sensor fixing hole (22) penetrating the insulating gasket (20) is also formed at the center of the insulating gasket (20); the sensor fixing hole (22) is longitudinally aligned with a central fixing hole (13) on the base (10).

5. A novel rail transit tunnel wall vibration acceleration sensor fixing device according to claim 2 or 3, characterized in that: The bottom of the protective cover (30) is formed with second base connection holes (31) whose number is equal to the number of the protective cover fixing holes (14); the second base connection holes (31) penetrate the protective cover (30), and the plurality of second base connection holes (31) are respectively longitudinally aligned with the plurality of protective cover fixing holes (14) on the base (10).

6. A novel rail transit tunnel wall vibration acceleration sensor fixing device according to claim 5, characterized in that: A data line guide groove (32) communicating with the inner cavity of the second base connection hole (31) is also formed at the bottom of the outer wall of the second base connection hole (31), and the data line of the sensor passes through the data line guide groove (32).

7. A novel rail transit tunnel wall vibration acceleration sensor fixing device according to claim 6, characterized in that: At least one data line fixing hole (15) is also formed on the side surface of the base (10), and a tie for fastening the sensor data line is passed through the data line fixing hole (15).

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