Grating surrounding rock pressure detection device

Abstract

The utility model relates to the technical field of grating surrounding rock pressure detection, and discloses a grating surrounding rock pressure detection device, which comprises an anchor rod, the right end of the anchor rod is fixedly connected with a mounting seat, the middle part of the right side of the mounting seat is fixedly connected with a wireless transmitter, and the inner wall of the anchor rod is fixedly connected with a plurality of pressure plates. The side, away from the inner wall of the anchor rod, of the pressure plate is fixedly connected with a connecting rod, the side, away from the pressure plate, of the connecting rod is fixedly connected with a pressing block, a transmission optical cable is arranged on the middle side of the interior of the anchor rod, and a grating sensor is arranged on the surface of the transmission optical cable. A worker restores the pressure information of the surrounding rock by observing the strain information of each grating sensor, and meanwhile, the grating sensors have the characteristics of small size, corrosion resistance, electromagnetic interference resistance, high sensitivity, passivity, stable performance, good safety performance and the like, and can well adapt to various complex environments.

Description

Technical Field

[0001] The utility model relates to the technical field of grating surrounding rock pressure detection, in particular to a grating surrounding rock pressure detection device. Background Art

[0002] As the self-weight stress and tectonic stress of the surrounding rock continue to increase, the probability of roof delamination and collapse will greatly increase. Therefore, it is particularly important to be able to detect changes in surrounding rock pressure accurately and in a timely manner. In recent years, the rise of fiber grating sensing technology has provided new ideas and methods for surrounding rock monitoring in coal mine tunnels.

[0003] Traditional mechanical or electrical pressure sensors have technical limitations such as poor anti-electromagnetic interference ability, poor accuracy and stability, and inability to transmit signals remotely and monitor them online, which greatly limits the application of traditional pressure sensors in harsh environments. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a grating surrounding rock pressure detection device to solve the technical limitations of traditional mechanical or electrical pressure sensors mentioned in the above background technology, such as poor anti-electromagnetic interference ability, poor accuracy and stability, and inability to transmit signals remotely and monitor online, which greatly limits the application of traditional pressure sensors in harsh environments.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a grating surrounding rock pressure detection device, comprising an anchor rod, the right end of the anchor rod is fixedly connected to a mounting seat, a grouting hole is opened on the upper right side of the mounting seat, a grouting cover is threadedly connected to the surface of the grouting hole, a wireless transmitter is fixedly connected to the middle right side of the mounting seat, expansion bolts are arranged on both sides of the mounting seat, fastening nuts are arranged on the surface of the expansion bolts, a fixing ring is arranged on the surface of the anchor rod, a plurality of pressure plates are fixedly connected to the inner wall of the anchor rod, a connecting rod is fixedly connected to the side of the pressure plate away from the inner wall of the anchor rod, a pressure block is fixedly connected to the side of the connecting rod away from the pressure plate, a transmission optical cable is arranged on the inner middle side of the anchor rod, and a grating sensor is arranged on the surface of the transmission optical cable.

[0006] Preferably, there are a plurality of fixing rings, and the fixing rings are distributed on the surface of the anchor rod in a linear array, and the intervals between the fixing rings are the same.

[0007] By adopting the above technical solution, fixing rings, anchor rods, etc. are set for use in combination. By setting several fixing rings, the roughness of the anchor rod surface is increased, the contact area between the anchor rod and the anchoring agent is increased, the friction between the anchor rod and the anchoring agent is strengthened, and the installation strength of the anchor rod is improved.

[0008] Preferably, the plurality of pressure plates are evenly distributed on the inner wall of the anchor rod in a ring array, and the spacings between the plurality of pressure plates are the same.

[0009] Preferably, there are several grating sensors, and the positions of the several grating sensors correspond to the positions of the several pressing blocks.

[0010] By adopting the above technical scheme, a grating sensor, a pressure block and the like are arranged in conjunction with a pressure plate and a connecting rod. The external pressure squeezes the pressure plate through the anchor rod, and the pressure plate applies pressure to the pressure block through the connecting rod. The pressure block then squeezes the grating sensor, and the grating sensor generates strain. The wavelength signal of the grating then drifts. The staff restores the pressure information of the surrounding rock by observing the strain information of the grating sensor.

[0011] Preferably, the left end of the grouting hole passes through the right wall of the mounting seat and extends to the left side of the mounting seat, and the right end surface of the grouting hole is provided with a thread matched with the grouting cover.

[0012] Preferably, the right end of the transmission optical cable is electrically connected to the left end of the wireless transmitter.

[0013] By adopting the above technical solution, through setting up transmission optical cables, wireless transmitters, etc. for use together, the grating sensor transmits the optical signal to the wireless transmitter through the transmission optical cable. The wireless transmitter can transmit data remotely, which is convenient for staff to use.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The grating surrounding rock pressure detection device is used by setting grating sensors, pressure blocks, etc. in conjunction with pressure plates and connecting rods. The external pressure squeezes the pressure plate through the anchor rod, and the pressure plate applies pressure to the pressure block through the connecting rod. The pressure block then squeezes the grating sensor, and the grating sensor generates strain. The staff restores the pressure information of the surrounding rock by observing the strain information of each grating sensor. At the same time, the grating sensor has the characteristics of small size, corrosion resistance, anti-electromagnetic interference, high sensitivity, passive, stable performance, good safety performance, etc., and can adapt well to various complex environments.

[0016] 2. The grating surrounding rock pressure detection device is used in conjunction with a fixing ring, an anchor rod, etc., and the roughness of the anchor rod surface is increased by setting a plurality of fixing rings, the contact area between the anchor rod and the anchoring agent is increased, the friction between the anchor rod and the anchoring agent is strengthened, and the installation strength of the anchor rod is improved. The grouting hole is closed by screwing the grouting cover back into the grouting hole to prevent leakage of the grouting hole when the anchoring agent is solidified. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the positive cross-section structure of the utility model;

[0019] Figure 3 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0020] Figure 4 For this utility model Figure 2 Enlarged structural diagram of point B in the middle

[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of the anchor rod of the utility model.

[0022] In the figure: 1. Anchor rod; 2. Fixing ring; 3. Mounting seat; 4. Expansion bolt; 5. Fastening nut; 6. Wireless transmitter; 7. Grouting cover; 8. Grouting hole; 9. Connecting rod; 10. Pressure plate; 11. Pressure block; 12. Grating sensor; 13. Transmission optical cable. DETAILED DESCRIPTION

[0023] 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.

[0024] Embodiment 1:

[0025] Please refer to Figure 1-4 A grating surrounding rock pressure detection device comprises an anchor rod 1, a mounting seat 3 is fixedly connected to the right end of the anchor rod 1, a grouting hole 8 is opened on the upper right side of the mounting seat 3, a grouting cover 7 is threadedly connected to the surface of the grouting hole 8, a wireless transmitter 6 is fixedly connected to the middle right side of the mounting seat 3, expansion bolts 4 are arranged on both sides of the mounting seat 3, fastening nuts 5 are arranged on the surface of the expansion bolts 4, a fixing ring 2 is arranged on the surface of the anchor rod 1, a plurality of pressure plates 10 are fixedly connected to the inner wall of the anchor rod 1, the plurality of pressure plates 10 are evenly distributed on the inner wall of the anchor rod 1 in an annular array, and the spacing between the plurality of pressure plates 10 is the same, a connecting rod 9 is fixedly connected to the side of the pressure plate 10 away from the inner wall of the anchor rod 1, a pressure block 11 is fixedly connected to the side of the connecting rod 9 away from the pressure plate 10, a transmission optical cable 13 is arranged on the inner middle side of the anchor rod 1, a grating sensor 12 is arranged on the surface of the transmission optical cable 13, the number of the grating sensors 12 is several, and the positions of the plurality of grating sensors 12 correspond to the positions of the plurality of pressure blocks 11.

[0026] Working principle: When in use, the staff will drill a hole in the tunnel in advance. After drilling the hole, the staff will insert the anchor rod 1 into the hole to make the mounting seat 3 fit the hole. At this time, the staff will use the expansion bolt 4 to fix the mounting seat 3 to the hole. At this time, the staff will separate the grouting cover 7 from the grouting hole 8 by rotating the grouting cover 7. The staff will inject the anchoring agent through the mesh hole of the grouting hole 8 to fill the gap between the anchor rod 1 and the hole. When the external pressure pushes the pressure plate 10 by squeezing the anchor rod 1, the pressure plate 10 applies pressure to the pressure block 1 through the connecting rod 9. 1, the pressing block 11 further squeezes the grating sensor 12, the grating sensor 12 generates strain, and the wavelength signal of the grating drifts immediately. The grating sensor 12 transmits the optical signal to the wireless transmitter 6 through the transmission optical cable 13. The wireless transmitter 6 can transmit data remotely. The staff restores the pressure information of the surrounding rock by observing the strain information of the grating sensor 12. The grating sensor 12 has the characteristics of small size, corrosion resistance, anti-electromagnetic interference, high sensitivity, passive, stable performance, good safety performance, etc., and can adapt well to various complex environments.

[0027] Compared with the related art, the utility model provides a grating surrounding rock pressure detection device with the following beneficial effects: by setting a grating sensor 12, a pressure block 11, etc. in conjunction with a pressure plate 10 and a connecting rod 9, the external pressure squeezes the pressure plate 10 through the anchor rod 1, and the pressure plate 10 applies pressure to the pressure block 11 through the connecting rod 9, and the pressure block 11 then squeezes the grating sensor 12, and the grating sensor 12 generates strain. The staff restores the pressure information of the surrounding rock by observing the strain information of each grating sensor 12. At the same time, the grating sensor 12 has the characteristics of small size, corrosion resistance, resistance to electromagnetic interference, high sensitivity, passivity, stable performance, good safety performance, etc., and can adapt well to various complex environments.

[0028] Embodiment 2:

[0029] Please refer to Figure 1-5 The right end of the anchor rod 1 is fixedly connected with a mounting seat 3, a grouting hole 8 is opened on the upper right side of the mounting seat 3, a grouting cover 7 is threadedly connected to the surface of the grouting hole 8, the left end of the grouting hole 8 passes through the right wall of the mounting seat 3 and extends to the left side of the mounting seat 3, and the right end surface of the grouting hole 8 is provided with a thread matched with the grouting cover 7, and a fixing ring 2 is provided on the surface of the anchor rod 1, the number of the fixing rings 2 is several, and the several fixing rings 2 are distributed on the surface of the anchor rod 1 in a linear array, and the spacing between the several fixing rings 2 is the same

[0030] Working principle: After the grouting is completed, the staff will screw the grouting cover 7 back into the grouting hole 8 to seal the grouting hole 8 to prevent the grouting hole 8 from leaking when the anchor is solidified. At the same time, by setting a number of fixing rings 2, the roughness of the surface of the anchor rod 1 is increased, the contact area between the anchor rod 1 and the anchor is increased, the friction between the anchor rod 1 and the anchor is strengthened, and the installation strength of the anchor rod 1 is improved.

[0031] Compared with the related art, the grating surrounding rock pressure detection device provided by the utility model has the following beneficial effects: by setting a fixing ring 2, an anchor rod 1, etc. for use in combination, by setting a plurality of fixing rings 2, the roughness of the surface of the anchor rod 1 is increased, the contact area between the anchor rod 1 and the anchoring agent is increased, the friction between the anchor rod 1 and the anchoring agent is strengthened, and the installation strength of the anchor rod 1 is improved. By screwing the grouting cover 7 back into the grouting hole 8, the grouting hole 8 is closed to prevent the grouting hole 8 from leaking when the anchoring agent is solidified.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grating surrounding rock pressure detection device, comprising an anchor rod (1), characterized in that: The right end of the anchor rod (1) is fixedly connected to a mounting seat (3), a grouting hole (8) is opened on the upper right side of the mounting seat (3), a grouting cover (7) is threadedly connected to the surface of the grouting hole (8), a wireless transmitter (6) is fixedly connected to the middle right side of the mounting seat (3), expansion bolts (4) are arranged on both sides of the mounting seat (3), a tightening nut (5) is arranged on the surface of the expansion bolt (4), a fixing ring (2) is arranged on the surface of the anchor rod (1), a plurality of pressure plates (10) are fixedly connected to the inner wall of the anchor rod (1), a connecting rod (9) is fixedly connected to the side of the pressure plate (10) away from the inner wall of the anchor rod (1), a pressure block (11) is fixedly connected to the side of the connecting rod (9) away from the pressure plate (10), a transmission optical cable (13) is arranged on the inner middle side of the anchor rod (1), and a grating sensor (12) is arranged on the surface of the transmission optical cable (13).

2. A grating surrounding rock pressure detection device according to claim 1, characterized in that: The number of the fixing rings (2) is several, and the several fixing rings (2) are distributed on the surface of the anchor rod (1) in a linear array, and the spacing between the several fixing rings (2) is the same.

3. A grating surrounding rock pressure detection device according to claim 1, characterized in that: The plurality of pressure plates (10) are evenly distributed on the inner wall of the anchor rod (1) in a ring array, and the spacing between the plurality of pressure plates (10) is the same.

4. The grating surrounding rock pressure detection device according to claim 1, characterized in that: The number of the grating sensors (12) is several, and the positions of the several grating sensors (12) correspond to the positions of the several pressing blocks (11).

5. The grating surrounding rock pressure detection device according to claim 1, characterized in that: The left end of the grouting hole (8) passes through the right wall of the mounting seat (3) and extends to the left side of the mounting seat (3), and the right end surface of the grouting hole (8) is provided with a thread that matches the grouting cover (7).

6. The grating surrounding rock pressure detection device according to claim 1, characterized in that: The right end of the transmission optical cable (13) is electrically connected to the left end of the wireless transmitter (6).

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