CN207300986U - Fluid pressure type acoustic emission sensor device - Google Patents

Abstract

The utility model discloses a hydraulic acoustic emission sensor device, which comprises an acoustic emission probe, a probe installation mechanism, a hydraulic pump, an oil tank and a connection assembly for combining with a transmission device. The probe installation mechanism is mainly composed of a shell, a probe cover It consists of cylinder, end cover and piston cylinder assembly. The device controls the movement direction of the casing and the probe sleeve through the piston cylinder assembly and the hydraulic pump, thereby solving the problem of effective installation and coupling of the acoustic emission probe, ensuring effective coupling between the acoustic emission probe and the borehole wall, and enhancing the detection of rock (body) stability and the reliability of monitoring and forecasting of rockburst dynamic disasters.

Description

Hydraulic acoustic emission sensor device

technical field

The utility model belongs to the technical field of rock (body) engineering safety monitoring in engineering construction, and relates to a hydraulic acoustic emission sensor device.

Background technique

Rock (body) deformation and damage during engineering construction, especially rockburst dynamic disasters, will directly endanger the safety of the project and even cause catastrophic effects. Therefore, effective monitoring and monitoring of rock (body) stability and rockburst dynamic disasters Forecasting is one of the important contents of engineering safety construction. At present, as an important means of non-destructive monitoring, acoustic emission is used in the monitoring and forecasting of rock (body) stability and rockburst dynamic disasters in engineering construction.

During the excavation and construction of surrounding rocks in underground engineering, in order to accurately predict the possible deformation and damage of surrounding rocks and dynamic disasters, acoustic emission sensors need to be arranged in the form of three-dimensional spatial distribution in the monitored surrounding rocks before excavation. area, and the more sensors are arranged, the more accurate the monitoring effect will be.

In the specific implementation mode, it is necessary to use a drilling rig to drill holes in the rock (body) before excavation of the rock (body), and the drilling depth increases with the depth of the project and the increase of the monitored range; however, the deeper the drilling, the acoustic emission Sensor installation is more difficult. At present, the installation methods of acoustic emission sensors mainly include the following:

(1) At the engineering site, the acoustic emission probe is directly placed in the borehole, relying on the residual liquid medium (such as water) in the borehole as the medium for signal transmission between the rock mass and the acoustic emission probe, the acoustic emission probe will receive The detection signal is transmitted to the ground monitoring system through cables; however, this method has the following disadvantages: ① This implementation is only suitable for drilling holes with a downward direction, and for drilling holes that are completely horizontal or upward at a certain angle, it is difficult to store Even for the downward drilling, the rock mass around the drilling still needs to be relatively intact, so as to avoid the loss or seepage of the transmission medium from the borehole cracks, and ensure that the AE probe is always in the transmission medium, but the actual site However, it is difficult to meet this requirement, which affects the monitoring effect; ②Although the liquid between the rock mass and the acoustic emission probe can be used as the coupling medium for signal transmission, the density of the liquid is generally relatively low, and its signal transmission effect is not as good as that of the acoustic emission probe directly. The detection signal received by the transmitting probe and the effective contact with the rock wall.

(2) In order to ensure effective coupling between the acoustic emission probe placed in the borehole and the borehole wall, cement can also be poured into the borehole at the engineering site so that the acoustic emission probe and the rock wall are poured as a whole. Although this method It can solve the problem of effective transmission of detection signals, but there are still the following defects: ①The acoustic emission probe after pouring is not recyclable, resulting in higher monitoring costs; ②If the acoustic emission probe is found to have no signal or poor signal after pouring, inspection or adjustment cannot be performed , only to re-drill the hole and install a new acoustic emission probe, which not only leads to high monitoring costs, but also prolongs the project progress and even delays the construction period; The grouting effect of the installation part of the emission probe is difficult to guarantee, and the installation part of the acoustic emission probe may not be effectively grouted, resulting in no effective coupling between the acoustic emission probe and the rock wall and no monitoring signal; on the other hand, the deeper the drilling , the greater the total shrinkage and deformation of the poured cement after solidification, the signal transmission cable of the acoustic emission probe bonded to the cement will bear tension due to the shrinkage and deformation of the cement, resulting in ineffective signal transmission; ④ During the excavation process Explosive blasting may loosen the grouting surface and the rock wall surface, resulting in a reduction in the effectiveness of monitoring signal transmission; ⑤The inside of the borehole is usually relatively humid, and it takes a long period for the grout to solidify after pouring, which will lead to a longer construction period; and the installation process Time-consuming and labor-intensive, a series of professional grouting equipment and grouting personnel are required, which further increases the monitoring cost.

(3) Another implementation method is to use a simple fixed installation device to fix the acoustic emission probe inside the device, and then use a rigid non-movable metal transmission rod to send the fixing device to the installation site, and use pressure to push the acoustic emission probe to the top of the device. After it comes out, it is in contact with the rock wall of the borehole to achieve fixation. Its advantage is that it realizes the contact between the acoustic emission probe and the rock wall in the case of non-grouting, but there are still the following disadvantages: The distance between the walls is very close, so the fixed installation device and the drilling hole must have a concentric structure, and the hole wall needs to be smooth, but these requirements are difficult to guarantee in actual construction; ② Due to the large size of the fixed installation device, it is only suitable for Large drilling holes lead to higher drilling costs; ③The entire transmission rod and installation device are inserted into the drilling hole through force and rigidity, which not only has high friction, it is easy to wear out the cable or the acoustic emission probe, and it is easy to It is stuck in the drill hole and cannot be sent to the place where it needs to be installed; ④ Since the fixed installation device is rigidly inserted into the drill hole through external force, the installation process is not only time-consuming and laborious, but also the work efficiency is extremely low; ⑤ Due to the The hole wall is a cylindrical surface, while the end face of the acoustic emission probe is flat. How to ensure the effective coupling between the end face of the acoustic emission probe and the borehole wall is also a difficult problem to be solved in practical applications.

Based on the disadvantages and defects in the above-mentioned various implementation methods, the application and popularization of acoustic emission detection in the monitoring of rock (body) stability and rockburst dynamic disasters is limited to a certain extent.

Therefore, how to install the acoustic emission probe in the borehole conveniently and effectively, and how to effectively couple the installed acoustic emission probe with the hole wall is still a difficult point in field monitoring and research at present, and there is a lack of relevant testing methods and technical support.

Utility model content

The purpose of this utility model is to provide a hydraulic acoustic emission sensor device for the deficiencies in the prior art. The validity of the detection signal.

The hydraulic acoustic emission sensor device described in the utility model includes an acoustic emission probe, a probe installation mechanism, a hydraulic pump, an oil tank and a connection assembly for combining with a transmission device. The probe installation mechanism is mainly composed of a housing, a probe sleeve, The housing is composed of an end cover and a piston cylinder assembly; the housing is a cylindrical body with two ends open, and a guide cylinder for combining with the probe sleeve is arranged in the inner hole of the housing, and the guide cylinder is located at the bottom of the inner wall of the housing and The inner hole is a through hole through the shell wall, and its center line is perpendicular to the center line of the shell; the probe sleeve is a cylinder with a closed lower end and an open upper end, and the inner hole of the probe sleeve is a clearance fit with the acoustic emission probe , The shape and the inner hole of the guide cylinder are clearance fit, the lower end surface of the probe sleeve is a circular arc surface matching the drilling radian of the rock mass to be monitored, and the upper end of the cylinder wall is provided with a hole for the cable joint of the acoustic emission probe to protrude from. One or two notches, the outer wall below the notch is provided with a shaft shoulder, if there are two notches, the two notches are axisymmetrically distributed with respect to the center line of the probe sleeve; the piston cylinder assembly is two sets , the two sets of piston and cylinder assemblies have the same structure, including pistons, piston rods and cylinders, and the cylinders of the two sets of piston and cylinder assemblies are symmetrically arranged on the upper left and upper right sides of the inner wall of the housing, and the axes of the two cylinders are parallel to the axis of the guide cylinder And on the same plane, the distance between the inner sides of the two oil cylinders is greater than the size of the end cap; the acoustic emission probe is installed in the probe sleeve, and its cable connector protrudes from the notch provided on the probe sleeve wall; the end cap Covering the upper end face of the probe sleeve and detachably connected with the probe sleeve; the probe sleeve with the acoustic emission probe installed is placed in the housing, its lower section is inserted into the guide cylinder set by the housing, and its lower end is located outside the housing. The position of the probe sleeve should be such that the cable connector of the acoustic emission probe faces one end of the shell; the pistons of the two sets of piston cylinder assemblies are respectively installed in their respective cylinders, and the ends of the piston rods of the two sets of piston cylinder assemblies are respectively connected to their respective pistons. The other ends are respectively fixedly connected with the corresponding parts on the top surface of the shaft shoulder. The oil cylinder inlet port of the two sets of piston cylinder assemblies is connected with the hydraulic pump through the oil delivery pipe, and the oil return port of the oil cylinder is connected with the fuel tank through the oil delivery pipe; the connecting components are two Two sets of connecting components are respectively installed at both ends of the housing.

In the above-mentioned hydraulic acoustic emission sensor device, a hydraulic gauge is arranged on the oil delivery pipe connecting the oil inlet of the oil cylinder and the hydraulic pump, so as to monitor the pressure in the oil cylinder.

In the above-mentioned hydraulic acoustic emission sensor device, the top of the oil cylinder can be fixedly connected to the inner wall of the casing by welding or threaded connection, or can be integrated with the casing.

The above-mentioned hydraulic acoustic emission sensor device, the connection assembly is composed of a nut and at least two pairs of connecting brackets, one end of each connecting bracket is evenly distributed around the outer wall of the nut and hinged to the outer wall of the nut, and the other end of each connecting bracket is fixedly connected to the housing; The connection assembly can make the installation mechanism realize a small rotation within a certain range, thereby further ensuring the effective coupling contact between the top of the housing and the bottom of the probe sleeve and the wall of the borehole.

For the above-mentioned hydraulic acoustic emission sensor device, in order to facilitate the installation of the piston cylinder assembly, the housing is composed of two semi-cylindrical bodies.

For the above-mentioned hydraulic acoustic emission sensor device, in order to facilitate the extraction of the cable connected to the acoustic emission probe, the notch provided on the upper end of the probe sleeve wall for the extension of the acoustic emission probe cable joint is a U-shaped notch, and The width of the U-shaped notch is slightly larger than the diameter of the cable connector of the acoustic emission probe.

The above-mentioned hydraulic acoustic emission sensor device, in order to further improve the signal transmission effect of the acoustic emission probe, can be coated with a couplant on the end surface of the acoustic emission probe in contact with the bottom of the probe sleeve, so that the lower end surface of the acoustic emission probe and the bottom of the probe sleeve are effectively Contact; the couplant is butter, vaseline and the like.

The working principle of the hydraulic acoustic emission sensor device described in the utility model is as follows: in the initial state, the piston is at the upper starting point under the action of pressure oil, at this time, the overall size of the probe installation mechanism equipped with the acoustic emission probe is smaller than the size of the drilling hole to be installed, In this way, the probe mounting mechanism equipped with the acoustic emission probe can move freely in the borehole; when the probe mounting mechanism equipped with the acoustic emission probe is sent to the predetermined position of the borehole, under the action of the hydraulic pump, the pressure that enters the oil cylinder through the oil pipeline The oil pushes the piston to move down to the starting point, so that the piston rod pushes the probe sleeve to move away from the housing, so that the top of the housing and the lower end surface of the probe sleeve are in close contact with the inner wall of the borehole, so that the probe installed with the acoustic emission probe can be installed The mechanism is in the monitoring state; when the acoustic emission probe needs to be recovered after monitoring, under the action of the hydraulic pump, the pressure oil entering the oil cylinder through the oil delivery pipe pushes the piston to move upward to the starting point. Driven by the piston rod, the lower end surface of the probe sleeve is separated from the inner wall of the borehole , the probe mounting mechanism installed with the acoustic emission probe is gradually restored to its original state, so as to facilitate the recovery of the acoustic emission probe.

Compared with the prior art, the utility model has the following beneficial effects:

1. The hydraulic acoustic emission sensor device described in the utility model, the piston cylinder assembly in the probe installation mechanism and the hydraulic pump cooperate to realize the control of the movement direction of the shell and the probe sleeve, thereby solving the problem of effective installation of the acoustic emission probe and Coupling problem; the initial size of the probe installation mechanism installed with the acoustic emission probe can be smaller than the size of the drilled hole. When it is sent to the predetermined position, under the action of the hydraulic pump, the pressure oil entering the oil cylinder through the oil pipeline pushes the piston down to the starting point Movement, so that the piston rod pushes the probe sleeve to move away from the housing, and the top of the housing and the lower end surface of the probe sleeve are arc-shaped surfaces that match the borehole wall, so that the top of the housing and the lower end of the probe sleeve can be realized. The end faces are in close contact with the inner wall of the borehole, ensuring effective coupling between the acoustic emission probe and the borehole wall, and enhancing the reliability of monitoring and forecasting of rock (body) stability and rockburst dynamic disasters.

2. The hydraulic acoustic emission sensor device described in the utility model, when the monitoring is over, under the action of the hydraulic pump, the pressure oil entering the oil cylinder through the oil delivery pipe pushes the piston to move upward to the starting point, driven by the piston rod, the lower end surface of the probe sleeve Separated from the inner wall of the borehole, the probe installation mechanism installed with the acoustic emission probe gradually returns to the initial state, which is convenient for taking it out from the borehole, realizing the recovery and reuse of the acoustic emission probe and the probe installation mechanism, and saving monitoring costs.

3. The hydraulic acoustic emission sensor device described in the utility model can monitor the pressure in the oil cylinder through the hydraulic gauge. If it is found that the deformation of the rock mass causes the pressure to drop, the hydraulic pump can be used to supplement the pressure, so that the acoustic emission probe and the borehole wall Always in a valid coupled state.

4. The hydraulic acoustic emission sensor device described in the utility model is hinged between the connecting brackets and the nuts at both ends of the housing of the probe installation mechanism, so the housing and the supporting transmission device can be within a certain range. A small rotation is realized inside, so as to further ensure the effective coupling and contact between the top of the shell and the bottom of the probe sleeve and the wall of the borehole.

5. The hydraulic acoustic emission sensor device described in the utility model has the characteristics of simple structure and convenient installation and disassembly, which can reduce labor intensity and save a lot of labor costs.

6. In order to meet different requirements, the hydraulic acoustic emission sensor device described in the present invention can connect multiple probe installation mechanisms equipped with acoustic emission probes through the transmission mechanism, so as to realize the arrangement of multiple acoustic emission probes in the same borehole The purpose of this is to improve the monitoring efficiency of rock (body) stability and rockburst dynamic disasters.

Description of drawings

Fig. 1 is a schematic structural diagram of the hydraulic acoustic emission sensor device of the present invention, the probe sleeve of the probe installation mechanism is in the state of moving towards the wall of the borehole.

Fig. 2 is a state where the probe sleeve in Fig. 1 is moving in the opposite direction to the borehole wall.

Fig. 3 is a sectional view along line A-A of Fig. 1 .

Fig. 4 is a structural schematic diagram of the housing of the probe installation mechanism of the hydraulic acoustic emission sensor device of the present invention.

Fig. 5 is a B-B sectional view of Fig. 4 .

Fig. 6 is a structural schematic diagram of the probe sleeve in the probe mounting mechanism of the hydraulic acoustic emission sensor device of the present invention.

Fig. 7 is a schematic diagram of the connection mode between the nut and the connection bracket in the connection assembly of the hydraulic acoustic emission sensor device described in the present invention

Fig. 8 is a schematic diagram of the acoustic emission probe of the hydraulic acoustic emission sensor device of the present invention.

FIG. 9 is a top view of FIG. 8 .

Fig. 10 is a schematic diagram of the combination of the hydraulic acoustic emission sensor device, the transmission device, and the ground workstation according to the present invention. The probe sleeve of the probe installation mechanism is in a state of moving toward the wall of the borehole.

Fig. 11 is a state where the probe sleeve in Fig. 10 is moving in the opposite direction to the borehole wall.

Fig. 12 is a schematic diagram of the probe installation mechanism installed with the acoustic emission probe in the installation state.

Fig. 13 is a schematic diagram of the probe installation mechanism installed with the acoustic emission probe in the monitoring state.

Fig. 14 is a schematic diagram of the probe installation mechanism installed with the acoustic emission probe in a recovered state.

In the figure: 1. shell, 1-1, semicircular cylinder, 1-2, connecting piece, 2. probe sleeve, 2-1, cylinder, 2-2, end cover, 2-3, shaft shoulder, 2-4. Notch, 3. Acoustic emission probe, 3-1. Cable connector, 4. Piston cylinder assembly, 4-1. Oil cylinder, 4-2. Piston rod, 4-3. Piston, 5. Guide cylinder , 6, the first oil pipeline, 7, the second oil pipeline, 8, hydraulic pump, 9, fuel tank, 10, connecting bracket, 11, nut, 12, transmission device, 13, computer, 14, ground workstation 15, hydraulic gauge.

Detailed ways

The technical solution of the hydraulic acoustic emission sensor device described in the utility model is clearly and completely described below through the embodiments in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all implementations example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The hydraulic acoustic emission sensor device in this embodiment, as shown in Figure 1, Figure 2 and Figure 3, includes an acoustic emission probe 3, a probe installation mechanism, a hydraulic pump 8, an oil tank 9 and a connecting assembly for combining with a transmission device.

The above-mentioned acoustic emission probe 3, as shown in Fig. 8 and Fig. 9, is a cylindrical structure with a cable joint 3-1 extending from the side, and the lower end of the acoustic emission probe 3 is coated with vaseline.

The above-mentioned probe installation mechanism is shown in Fig. 1, Fig. 2 and Fig. 3, and is mainly composed of a housing 1, a probe sleeve 2, an end cover 2-2 and a piston cylinder assembly 4. As shown in Figure 4 and Figure 5, the housing 1 is a cylindrical body with openings at both ends, which is composed of two semi-cylindrical bodies 1-1 through the connecting piece 1-2, and the inner hole is provided with a hole for connecting with the probe cover. The guide cylinder 5 combined with the cylinder 2, the guide cylinder 5 is located at the bottom of the inner wall of the housing and the inner hole is a through hole through the housing wall, and its center line is perpendicular to the center line of the housing; the probe sleeve 2 is shown in Figure 3, As shown in Fig. 6, it is a cylindrical body 2-1 with a closed lower end and an open upper end, the inner hole of the probe sleeve is a clearance fit with the acoustic emission probe 3, the shape is a clearance fit with the inner hole of the guide cylinder 5, and the lower end of the probe sleeve is a clearance fit. The end face is a circular arc surface matching the borehole radian of the rock mass to be monitored, and a U-shaped notch 2-4 protruding from the cable joint 3-1 of the acoustic emission probe is provided at the upper end of the cylinder wall, and the outer wall below the notch Shaft shoulder 2-3 is provided; piston oil cylinder assembly 4 is two sets, structure as shown in Figure 1, Figure 2, two sets of piston oil cylinder assemblies all include piston 4-3, piston rod 4-2 and oil cylinder 4-1, two The oil cylinders 4-1 of the piston cylinder assembly are symmetrically arranged on the upper left side and the upper right side of the inner wall of the housing respectively, and the axes of the two oil cylinders are parallel to the axis of the guide cylinder 5 and on the same plane, and the inner sides of the two oil cylinders 4-1 The spacing is greater than the size of the end cover 2-2, the piston 4-3 in each set of piston assemblies is located inside the oil cylinder 4-1, one end of the piston rod 4-2 is threadedly connected to the piston 4-3, and the other end of the piston rod 4-2 One end protrudes from the oil cylinder 4-1; the top of the oil cylinder 4-1 is fixedly connected with the inner wall of the housing 1 by welding, the upper part of the oil cylinder 4-1 is designed with a first oil port connected to the first oil delivery pipe 6, and the lower part of the oil cylinder 4-1 is designed with a The second oil port connected by the second oil delivery pipe 7, when the first oil port is the oil inlet, the second oil port is the oil return port, and when the second oil port is the oil inlet, the first oil port is the return port. oil port.

There are two sets of above-mentioned connection components, and the two sets of connection components are respectively installed at both ends of the housing 1, as shown in Figure 3, each set of connection components is composed of a nut 11 and two pair of connection brackets 10, and one end of the connection bracket 10 is welded to the shell The inner wall of body 1, the other end is hinged with nut 11 outer walls (seeing figure 7).

In this embodiment, the assembly method of each component of the hydraulic acoustic emission sensor device is as follows: the acoustic emission probe 3 is put into the probe sleeve 2, and one end coated with petroleum jelly is in contact with the bottom of the probe sleeve, and the cable connector 3- 1 Protrude from the U-shaped notch 2-4 provided on the wall of the probe sleeve; the end cover 2-2 covers the upper end surface of the probe sleeve 2, and the end cover 2-2 is fixed with the probe sleeve by screws; the installation has a sound The probe sleeve 2 of the transmitting probe is placed in the housing 1, its lower section is inserted into the guide cylinder 5 provided on the housing and its lower end is located outside the housing, the placement orientation of the probe sleeve 2 should make the cable joint of the acoustic emission probe 3-1 towards one end of the housing; the pistons 4-3 of the two sets of piston cylinder assemblies are respectively installed in their respective cylinders, and the ends of the piston rods 4-2 of the two sets of piston cylinder assemblies are fixedly connected to the respective pistons 4-3 respectively, The other ends are fixedly connected with the corresponding parts on the top surface of the shaft shoulder respectively, the first oil ports of the two oil cylinders 4-1 communicate with the hydraulic pump 8 or the oil tank 9 through the first oil delivery pipe 6, and the second oil ports of the two oil cylinders 4-1 pass through the first The second oil delivery pipe 7 communicates with the oil tank 9 or the hydraulic pump 8, and the hydraulic pump 8 communicates with the oil tank 9 through the oil delivery pipe. The hydraulic pump 8 and the oil tank 9 are installed in the bottom surface workstation 14 (see Fig. When it is an oil inlet and the second oil port is an oil return port, a hydraulic gauge 15 is installed on the ground pipeline of the first oil delivery pipe 6 .

The hydraulic acoustic emission sensor device in this embodiment is used in combination with the transmission device 12 and the bottom surface workstation 14. The combination is shown in Figure 10 and Figure 11. The hydraulic acoustic emission sensor device is used to be installed in the borehole of the rock mass to be monitored. , and transmit the received monitoring signal to the ground workstation through the cable, and the computer 13 in the ground workstation processes and displays the monitoring signal from the acoustic emission sensor.

As shown in Fig. 2, Fig. 11 and Fig. 12, the installation operation of the hydraulic acoustic emission sensor device: connect the first oil ports of the two oil cylinders 4-1 to the fuel tank 9 through the first oil delivery pipe 6, and connect the two oil cylinders 4-1 to the fuel tank 9 through the second oil delivery pipe 7. The second oil port of the oil cylinder 4-1 communicates with the hydraulic pump 8, and when the hydraulic pump is turned on, the two pistons 4-3 move to the upper starting position under the action of the pressure oil. The size of the hole, then put the probe installation mechanism equipped with the acoustic emission probe 3 into the drilled hole, and operate the transmission device 12 connected to it, and send the probe installation mechanism equipped with the acoustic emission probe 3 to the position to be monitored, and the installation is completed.

As shown in Figure 1, Figure 10, and Figure 13, the operation of the hydraulic acoustic emission sensor device in the monitoring state: connect the first oil ports of the two oil cylinders 4-1 to the hydraulic pump 8 through the first oil delivery pipe 6, and connect the first oil ports of the two oil cylinders 4-1 to the hydraulic pump 8 through the second oil delivery pipe 7 Connect the second oil ports of the two oil cylinders to the oil tank 9, turn on the hydraulic pump, and the two pistons 4-3 move from the upper starting point to the lower starting point under the action of the pressure oil. During this process, the two piston rods 4-2 Drive the probe sleeve 2 to move away from the shell 1, so that the top of the shell 1 and the lower end surface of the probe sleeve are in close contact with the borehole wall respectively, so as to realize the effective coupling between the acoustic emission probe and the borehole wall; The cable connected to the emission probe 3 extends to the surface and is connected to the computer 16 of the ground workstation. The acoustic emission probe 3 can monitor the rock (body) situation in the engineering construction, and the monitoring signal is transmitted to the ground workstation through the cable. The computer 13 processes the monitoring signal through the computer and displays it in real time. The pressure in the oil cylinder is monitored by the hydraulic gauge 15. If it is found that the deformation of the rock mass causes the pressure to drop, the hydraulic pump can be used to supplement the pressure, so that the acoustic emission probe and the borehole wall are always in an effective coupling state.

As shown in Figure 2, Figure 11, and 14, the recovery operation of the hydraulic acoustic emission sensor device: after the monitoring process is completed, the first oil port of the two oil cylinders 4-1 is connected with the fuel tank 9 through the first oil delivery pipe 6, and the first oil port of the two oil cylinders 4-1 is connected with the fuel tank 9 through the first oil delivery pipe 6, The second oil delivery pipe 7 connects the second oil ports of the two oil cylinders 4-1 with the hydraulic pump 8, and when the hydraulic pump is turned on, the two pistons 4-3 move from the lower starting point to the upper starting point under the action of the pressure oil. During this process, the two pistons The rod drives the probe sleeve and the piston to move in the same direction, so that the lower end surface of the probe sleeve is separated from the inner wall of the borehole and the overall size of the probe installation mechanism installed with the acoustic emission probe 3 is restored to the size when it was installed, and then the transmission device 12 is operated to move it Pulling out from the borehole allows the AE probe and its mounting mechanism to be recycled and reused.

Claims (5)

1. A hydraulic type acoustic emission sensor device, comprising an acoustic emission probe (3), is characterized in that also comprising a probe mounting mechanism, a hydraulic pump (8), an oil tank (9) and a connection assembly for combining with a transmission device, the The probe installation mechanism is mainly composed of a housing (1), a probe sleeve (2), an end cover (2-2) and a piston cylinder assembly (4); The housing (1) is a cylinder with openings at both ends, and a guide cylinder (5) for combining with the probe sleeve (2) is arranged in the inner hole of the housing, and the guide cylinder (5) is located in the housing The bottom of the wall and the inner hole are through holes penetrating the shell wall, the center line of which is perpendicular to the center line of the shell; the probe sleeve (2) is a cylinder (2-1) with a closed lower end and an open upper end, and the probe The inner hole of the sleeve and the acoustic emission probe (3) are clearance fit, and the shape is clearance fit with the inner hole of the guide cylinder (5), and the lower end surface of the probe sleeve is a circular arc matching the drilling radian of the rock mass to be monitored On the surface, one or two notches (2-4) are provided on the upper end of the cylinder wall for the cable connector (3-1) of the acoustic emission probe to protrude from, and the outer wall below the notch is provided with a shoulder (2-3), If there are two notches (2-4), the two notches are distributed axisymmetrically with respect to the center line of the probe sleeve; the piston cylinder assembly is two sets, and the two sets of piston cylinder assemblies have the same structure, and both include a piston (4-3), piston rod (4-2) and oil cylinder (4-1), the oil cylinders (4-1) of the two sets of piston oil cylinder assemblies are arranged symmetrically on the upper left side and the upper right side of the inner wall of the housing respectively, and the two oil cylinders The axis of the cylinder is parallel to the axis of the guide cylinder and on the same plane, and the distance between the inner sides of the two oil cylinders (4-1) is greater than the size of the end cover (2-2); The acoustic emission probe (3) is installed in the probe sleeve (2), and its cable connector (3-1) protrudes from the notch (2-4) provided on the probe sleeve wall; the end cover (2- 2) Cover the upper end surface of the probe sleeve (2) and be detachably connected with the probe sleeve; the probe sleeve (2) with the acoustic emission probe installed is placed in the housing (1), and its lower section is inserted into the housing. The guide cylinder (5) is set and its lower end is located outside the shell, and the probe sleeve (2) should be placed so that the cable connector (3-1) of the acoustic emission probe faces one end of the shell; the two sets of piston cylinder assemblies Pistons (4-3) are respectively installed in their respective oil cylinders. One end of the piston rods (4-2) of the two sets of piston cylinder assemblies is fixedly connected to the respective pistons (4-3), and the other end is respectively connected to the top surface of the shaft shoulder. Corresponding parts are fixedly connected, the oil cylinder oil inlet port of the two sets of piston cylinder assemblies is connected with the hydraulic pump (8) through the oil delivery pipe, and the oil return port of the oil cylinder is connected with the fuel tank (9) through the oil delivery pipe; there are two sets of connecting assemblies, two sets of connecting assemblies They are respectively installed at both ends of the casing (1). 2. The hydraulic acoustic emission sensor device according to claim 1, characterized in that the connecting assembly is composed of a nut (11) and at least two pairs of connecting brackets (10), and one end of each connecting bracket surrounds the nut (11) with a uniform outer wall distributed and hinged with the outer wall of the nut, and the other end of each connecting bracket is fixedly connected with the housing (1). 3. The hydraulic acoustic emission sensor device according to claim 1 or 2, characterized in that the housing (1) is composed of two semi-cylindrical bodies (1-1). 4. The hydraulic acoustic emission sensor device according to claim 1 or 2, characterized in that the end surface of the acoustic emission probe (3) in contact with the bottom of the probe sleeve is coated with a coupling agent. 5. The hydraulic acoustic emission sensor device according to claim 3, characterized in that the end surface of the acoustic emission probe (3) in contact with the bottom of the probe sleeve is coated with a coupling agent.