Anchor rod axial force monitoring device

Abstract

The utility model discloses an anchor rod axial force monitoring device comprising a measuring rod which is installed in an anchor rod and generates displacement along with stretching of the anchor rod; the high-precision displacement sensor is mounted on the anchor rod and is used for acquiring the displacement amount of the measuring rod and converting the acquired displacement amount into an axial force value; the data receiving end of the collector is connected with the high-precision displacement sensor, the data sending end of the collector is connected with a remote server, and the collector is used for sending the axial force value generated by the high-precision displacement sensor to the remote server for processing. The device can monitor the stress condition of the anchor rod on line in real time, and has the advantages of simplicity and convenience in operation, lower cost, high detection precision and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of anchor rod detection equipment, especially to an anchor rod axial force monitoring device. BACKGROUND

[0002] Anchor rod is a commonly used technology in civil engineering, which is a deep into stratum tensile member, one end is connected with engineering structure, the other end is anchored in the soil layer or rock layer of foundation, and the anchoring force of stratum is used to maintain the stability of structure. The main functions of anchor rod include supporting and fixing soil, transmitting and dispersing load, and reinforcing and stabilizing soil, and its working principle is that the steel bar or steel beam deeply buried in soil forms a mechanical connection with the surrounding soil through its strength and rigidity, and forms a system that bears load together. Anchor rod can change the mechanical state of surrounding rock, form a whole and stable rock belt around the roadway, and achieve the purpose of maintaining the stability of the roadway by using the common action of anchor rod and surrounding rock.

[0003] It is necessary to detect the axial force of anchor rod, and the existing anchor rod axial force monitoring methods usually include hand shaking detection method and stress wave detection method. The hand shaking detection method detects whether the pre-tightening force of anchor rod is normal by shaking the anchor rod with hand, and the specific operation is that the anchor rod is shaken with hand, and if the anchor rod appears obvious elastic deformation, it indicates that the pre-tightening force is insufficient and needs to be adjusted. The hand shaking detection method has the advantages of simplicity and convenience, and does not need special equipment. However, the detection result is not accurate enough, and there is a certain damage risk to the anchor rod. The stress wave detection method generates stress wave on the anchor rod by using an impact device, and then detects the propagation speed and waveform of the stress wave by using a stress meter or displacement sensor, so as to calculate the size of the pre-tightening force of the anchor rod. The stress wave detection method has the advantages of accurate detection result, ability to detect internal damage of anchor rod, and high detection speed. However, the method needs professional equipment and technology, the operation is complex, the cost is high, and the change of anchor rod axial force cannot be observed in real time.

[0004] Therefore, the applicant finds a method to solve the above problems through beneficial exploration and research, and the technical scheme to be introduced below is generated in this background. CONTENT OF THE UTILITY MODEL

[0005] The technical problem to be solved by the utility model is to provide an anchor rod axial force monitoring device which is simple and convenient to operate, low in cost, can monitor the change of anchor rod axial force in real time, and high in detection precision.

[0006] The technical problem to be solved by the utility model can be realized by adopting the following technical scheme.

[0007] An anchor rod axial force monitoring device comprises:

[0008] a measuring rod installed in the anchor rod and displaced following the stretching of the anchor rod;

[0009] a high-precision displacement sensor installed on the anchor rod and used to collect the displacement of the measuring rod and convert the collected displacement into an axial force value; and

[0010] a collector with a data receiving end connected with the high-precision displacement sensor and a data sending end connected with a remote server, used to send the axial force value generated by the high-precision displacement sensor to the remote server for processing.

[0011] In one preferred embodiment of the present application, an axial blind hole is formed in one end of the anchor rod, the measuring rod is installed in the axial blind hole of the anchor rod, one end of the measuring rod is fixedly connected with the bottom surface of the axial blind hole, the other end of the measuring rod is in contact with the detection probe of the high-precision displacement sensor, and a certain gap is maintained between the outer circumferential surface of the measuring rod and the inner circumferential surface of the axial blind hole.

[0012] In one preferred embodiment of the present application, a mounting hole for accommodating the high-precision displacement sensor is formed in one end of the anchor rod, the mounting hole is located outside the axial blind hole and axially communicates with the axial blind hole, and the high-precision displacement sensor is installed in the mounting hole of the anchor rod and the detection probe of the high-precision displacement sensor extends into the axial blind hole and is in contact with the end surface of the measuring rod facing the high-precision displacement sensor.

[0013] In one preferred embodiment of the present application, an internal thread is formed on the inner hole surface of the mounting hole, and an external thread matched with the internal thread is formed on the outer circumferential surface of the shell of the high-precision displacement sensor; during installation, the high-precision displacement sensor is screwed into the mounting hole of the anchor rod through the cooperation of the external thread and the internal thread.

[0014] In one preferred embodiment of the present application, the high-precision displacement sensor is a high-precision displacement sensor with a model number of SEN920.

[0015] In one preferred embodiment of the present application, the data receiving end of the collector is connected with the high-precision displacement sensor through a 485 bus, and the data sending end of the collector is connected with the remote server through TCP.

[0016] In one preferred embodiment of the present application, the collector is a collector with a model number of WAU9200.

[0017] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: This utility model installs a measuring rod inside the anchor bolt. When the anchor bolt is tightened, it is stretched, causing the measuring rod to displace. A high-precision displacement sensor collects the displacement of the measuring rod, and the axial force value of the anchor bolt is obtained through calculation. This axial force value is then sent to a remote server for processing via a data acquisition device, thus enabling real-time online monitoring of the anchor bolt's stress. This utility model has the advantages of simple operation, low cost, and high detection accuracy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of the anchor rod of this utility model.

[0020] Figure 2 yes Figure 1 A sectional view along the AA direction.

[0021] Figure 3 This is the electrical schematic diagram of this utility model. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0023] See Figures 1 to 3 The figure shows an anchor bolt axial force monitoring device, which includes a measuring rod 100, a high-precision displacement sensor 200, and a data acquisition device 300.

[0024] The measuring rod 100 is installed inside the anchor rod 10 and moves with the tension of the anchor rod 10. Specifically, an axial blind hole 11 is formed in one end of the anchor rod 10, and the measuring rod 100 is installed in the axial blind hole 11 of the anchor rod 10. One end of the measuring rod 100 is fixed to the bottom surface of the axial blind hole 11, and the fixing method can be threaded connection, adhesive connection, interference fit connection, etc. The other end of the measuring rod 100 contacts the detection contact rod 210 of the high-precision displacement sensor 200, and a certain gap is maintained between its outer peripheral surface and the inner peripheral surface of the axial blind hole 11 to facilitate the movement of the measuring rod 100 within the axial blind hole 11.

[0025] The high-precision displacement sensor 200 is installed on the anchor rod 10 and is used to collect the displacement of the measuring rod 100 and convert the collected displacement into an axial force value. Specifically, a mounting hole 12 for accommodating the high-precision displacement sensor 200 is formed in one end of the anchor rod 10, the mounting hole 12 is located outside the axial blind hole 11 and is in axial communication, the high-precision displacement sensor 200 is installed in the mounting hole 12 of the anchor rod 10, and a detection touch rod 210 of the high-precision displacement sensor 200 extends into the axial blind hole 11 and forms contact with an end surface of the measuring rod 100 facing the high-precision displacement sensor 200. When the measuring rod 100 generates displacement, the high-precision displacement sensor 200 obtains the displacement of the measuring rod 100 through the detection touch rod 210. In the embodiment, the high-precision displacement sensor 200 preferably adopts a high-precision displacement sensor of model SEN920.

[0026] In order to facilitate the installation of the high-precision displacement sensor 200, an internal thread 12a is formed on an inner hole surface of the mounting hole 12 of the anchor rod 10, and an external thread 220 matched with the internal thread 12a is formed on an outer peripheral surface of a shell of the high-precision displacement sensor 200. During installation, the high-precision displacement sensor 200 is screwed into the mounting hole 12 of the anchor rod 10 through the cooperation of the external thread 220 and the internal thread 12a.

[0027] The data receiving end of the collector 300 is connected with the high-precision displacement sensor 200 through a 485 bus, and the data sending end is connected with the remote server 20 through TCP, and is used to send the axial force value generated by the high-precision displacement sensor 200 to the remote server 20 for processing. In the embodiment, the collector 300 preferably adopts a collector of model WAU9200.

[0028] When the anchor rod 10 is fastened, the anchor rod 10 is stretched to drive the measuring rod 100 to displace, the high-precision displacement sensor 200 collects the displacement of the measuring rod 100, obtains the axial force value of the anchor rod 100 through conversion calculation, and then sends the axial force value to the remote server 20 through the collector 300 for processing, so that the stress condition of the anchor rod can be monitored online and in real time.

[0029] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification only illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An anchor rod shaft force monitoring device, characterized by, The utility model relates to a kind of axial force measurement device, comprising: A measuring rod is installed in anchor rod and generates displacement following the stretching of the anchor rod; A high-precision displacement sensor is installed on the anchor rod and used to collect the displacement of the measuring rod and convert the collected displacement into an axial force value;And A collector is connected with the high-precision displacement sensor at its data receiving end, and connected with a remote server at its data sending end, for sending the axial force value generated by the high-precision displacement sensor to the remote server for processing.

2. An anchor rod shaft force monitoring device as claimed in claim 1, characterised in that, An axial blind hole is formed in one end of the anchor rod, and the measuring rod is installed in the axial blind hole of the anchor rod, with one end fixed to the bottom surface of the axial blind hole and the other end in contact with the probe touch rod of the high-precision displacement sensor, and a certain gap is maintained between the outer peripheral surface and the inner peripheral surface of the axial blind hole.

3. An anchor rod shaft force monitoring device as claimed in claim 2, characterised in that, An installation hole is formed in one end of the anchor rod for accommodating the high-precision displacement sensor, and the installation hole is located outside the axial blind hole and axially communicates, and the high-precision displacement sensor is installed in the installation hole of the anchor rod with its probe touch rod extending into the axial blind hole and forming contact with the end surface of the measuring rod facing the high-precision displacement sensor.

4. An anchor rod shaft force monitoring device as claimed in claim 3, characterised in that, An internal thread is formed on the inner hole surface of the installation hole, and an external thread is formed on the outer peripheral surface of the housing of the high-precision displacement sensor, which cooperates with the internal thread;When installed, the high-precision displacement sensor is screwed into the installation hole of the anchor rod through the cooperation of the external thread and the internal thread.

5. An anchor rod shaft force monitoring device as claimed in claim 4, wherein, The high-precision displacement sensor uses a high-precision displacement sensor of model SEN920.

6. The rock bolt shaft force monitoring device as claimed in claim 1, characterised in that, The data receiving end of the collector is connected with the high-precision displacement sensor through a 485 bus, and the data sending end is connected with the remote server through TCP.

7. An anchor rod shaft force monitoring device as claimed in claim 6, characterised in that The collector uses a collector of model WAU9200.

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