Multifunctional three-way hollow inclusion strain gauge installation auxiliary device

Abstract

The utility model relates to a multifunctional three-way hollow inclusion strain gauge installation auxiliary device, and belongs to the technical field of ground stress testing. The device comprises a device box body, the two ends of the device box body in the axial direction are an end A and an end B respectively, an upper partition plate and a lower partition plate are fixedly arranged in the middle of the device box body in the axial direction, a water flowing cavity is formed between the upper partition plate and the lower partition plate, and a water injection opening communicated with the water flowing cavity is formed in the top of the device box body; the upper partition plate and the lower partition plate are in threaded connection with a brush head connecting rod, the brush head connecting rod extends out of the end A of the device box body, a brush head is installed at the tail end of the brush head connecting rod, a hollow rear cover is fixedly arranged at the end B of the device box body, and a strain gauge cable is arranged on the central axis of the device box body. The two ends of the strain gauge cable respectively penetrate through the end A of the device box body and a threaded through hole in the center of the hollow rear cover; and a sensor group is fixedly arranged at the end A of the device box body and is externally connected with a computer through a data line. The device can be used for auxiliary installation of the hollow inclusion strain gauge.

Description

Technical Field

[0001] The utility model relates to a multifunctional three-way hollow package strain gauge installation auxiliary device, belonging to the technical field of ground stress testing. Background Art

[0002] Underground engineering refers to various engineering activities carried out below the surface, including underground chambers, underground tunnels, underground mining mines, underground water conservancy projects, etc. With the construction and continuous development of various underground projects, the field of underground construction technology development is also facing new opportunities and challenges. The most important of these is the series of engineering problems brought about by the existence of geostress. The rock excavation and underground construction process are generally and profoundly affected by the geostress. Geostress is a kind of stress existing inside the rock mass in a natural state. Its essence comes from many factors such as rock deadweight, structural dynamics, landform transformation and erosion. It is the fundamental cause of deformation and damage of underground structures such as mining, civil engineering and water conservancy projects.

[0003] At present, mines in my country are still being developed deeper. Due to the increase in mining depth, the impact of ground stress on underground engineering design is becoming increasingly greater. Ground stress measurement can obtain the geological stress environment of the underground engineering, thereby providing a guarantee for analyzing the stability of the tunnel surrounding rock and the development and construction of some underground engineering.

[0004] In order to solve this series of engineering problems, ensure that deep mining can have reasonable shaft and tunnel engineering and mining construction design, and ensure the long-term safety of underground projects such as underground mining, it is necessary to measure the ground stress before the construction design, and analyze and process the data to obtain the real stress distribution state of the mine and underground engineering, and promote the rationalization of mining design and planning. Only by mastering the ground stress state in the engineering area can we reasonably determine the reasonable arrangement between the mine shaft and tunnel engineering and the mining design and support engineering, and determine the best solution for the cross-sectional size and excavation steps of the shaft and tunnel engineering. For support engineering, ground stress directly determines the selection of support form and the determination of support parameters. Only by clarifying the ground stress conditions can we better maximize the economic benefits of the mine while ensuring safe production.

[0005] At present, the traditional hollow inclusion stress relief test device also has some problems in the actual ground stress measurement process. When the measuring hole is prepared and the hollow inclusion is installed, the hollow inclusion strain gauge will be affected by the humidity and flatness in the hole, which will cause the measurement error of the hollow inclusion strain gauge to increase. If the cable of the hollow inclusion strain gauge is not handled properly, it will be broken as the drill rod rotates during drilling, resulting in data transmission interruption and experiment failure. In addition, the workload before installing the hollow inclusion is huge and the dust is serious, which affects the health of the operator. Utility Model Content

[0006] Aiming at the problem of installing a hollow package strain gauge, the utility model proposes a multifunctional three-way hollow package strain gauge installation auxiliary device. The device of the utility model can reduce the workload before installing the hollow package, improve work efficiency, and reduce dust pollution.

[0007] A multifunctional three-way hollow enclosed body strain gauge installation auxiliary device, comprising a device box and a strain gauge cable 4, the two ends of the device box along the axial direction are respectively A end and B end, the middle part of the device box is axially fixedly provided with an upper partition and a lower partition, the upper partition and the lower partition are both extended and fixed at the A end of the device box, the other end of the upper partition is fixedly connected to the top plate of the device box through a first vertical partition 3, a water cavity 16 is formed between the upper partition and the lower partition, a water injection port 10 connected to the water cavity 16 is opened on the top of the device box, and the water injection port 10 is located between the first vertical partition 3 and the device box. Between the B ends, a brush head connecting rod 2 is threadedly connected on the upper partition and the lower partition, the brush head connecting rod 2 extends to the outside of the A end of the device box, and a brush head 1 is installed on the end of the brush head connecting rod 2. A hollow back cover 12 is fixedly provided at the B end of the device box, and a threaded through hole 11 is opened in the center of the hollow back cover 12. The strain gauge cable 4 is fixedly provided on the central axis of the device box, and the strain gauge cable 4 passes through the A end of the device box and the threaded through hole 11 of the hollow back cover 12 in sequence; a sensor group 5 is fixedly provided at the A end of the device box, and the sensor group 5 is externally connected to a computer 13 through a data cable 14.

[0008] Preferably, a first electric telescopic rod perpendicular to the upper partition is provided on the upper partition, a second electric telescopic rod and a fourth electric telescopic rod perpendicular to the lower partition are provided on the lower partition, the central axes of the first electric telescopic rod and the second electric telescopic rod are located on the same vertical line, a third electric telescopic rod perpendicular to the top plate is provided on the top plate of the device box, the central axes of the third electric telescopic rod and the fourth electric telescopic rod are located on the same vertical line, the ends of the first electric telescopic rod, the second electric telescopic rod, the third electric telescopic rod and the fourth electric telescopic rod are respectively fixed with a first magnetic buckle, a second magnetic buckle, a third magnetic buckle and a fourth magnetic buckle, the first magnetic buckle and the second magnetic buckle cooperate to form a first clip 8, the third magnetic buckle and the fourth magnetic buckle cooperate to form a second clip, and the strain gauge cable 4 is fixedly arranged on the central axis of the device box through the first clip 8 and the second clip.

[0009] Preferably, a first control switch and a second control switch 9 are fixedly provided on the top plate of the device box, the first electric telescopic rod and the second electric telescopic rod are both electrically connected to the first control switch, and the third electric telescopic rod and the fourth electric telescopic rod are both electrically connected to the second control switch 9.

[0010] Preferably, a load-bearing column 7 perpendicular to the upper partition is fixedly provided in the middle of the upper partition, and the top of the load-bearing column 7 is fixedly provided on the top plate of the device box; a second vertical partition 6 perpendicular to the lower partition is fixedly provided in the middle of the lower partition, and the bottom end of the second vertical partition 6 is fixedly provided on the bottom plate of the device box; a support column 17 perpendicular to the lower partition is fixedly provided at the end of the lower partition, and the bottom end of the support column 17 is fixedly provided on the bottom plate of the device box.

[0011] Preferably, the lower partition between the second vertical partition 6 and the support column 17 is a water retaining steel plate 15, and the thickness of the water retaining steel plate 15 is greater than the thickness of the upper partition.

[0012] The sensor group 5 includes a humidity sensor, a temperature sensor and a depth measurement sensor. The probes of the humidity sensor, the temperature sensor and the depth measurement sensor are all extended to the outside of the A end of the device box. The humidity sensor, the temperature sensor and the depth measurement sensor are all connected to the computer via a data line 14.

[0013] How to use the multifunctional three-way hollow body strain gauge installation auxiliary device:

[0014] (1) When using the hollow enclosure method to measure geostress, after the large hole and the small hole for strain gauge installation are drilled, before installing the hollow strain gauge enclosure, install the cleaning brush head and the detachable brush head connecting rod respectively;

[0015] (2) Connect the drill rod to the threaded through hole of the hollow rear cover, move the device to the intersection of the large hole and the installation small hole, and insert the cleaning brush head into the small hole;

[0016] (3) The water pipe injects high-pressure water through the water injection port, and the high-pressure water flows into the small hole through the water cavity to clean the small hole;

[0017] (4) Remove the device from the large hole, disconnect the water pipe connected to the water inlet, replace the cleaning brush head with a drying brush head, and then insert it into the small hole to dry the small hole;

[0018] (5) The humidity, temperature and depth of the small hole are detected in real time by the sensor group. When the experimental conditions are met, the device is withdrawn from the large hole and a hollow package strain gauge is installed;

[0019] (6) Remove the dry brush head and the detachable brush head connecting rod, connect the water pipe to the water injection port, and send the device to the intersection of the large hole and the installation small hole. Before the strain gauge cable enters the hole, pass the strain gauge cable through the A end of the device box and the threaded through hole of the hollow rear cover in sequence, and fix it on the central axis of the device box to ensure the hollow straightened state; specifically, outside the hole, first pass the strain gauge cable through the A end of the device box and the threaded through hole of the hollow rear cover in sequence, and fix it on the central axis of the device box to ensure the hollow straightened state. After the strain gauge is installed into the small hole, start to install the device into the hole, the strain gauge is in the small hole, and the device is in the large hole;

[0020] (7) High-pressure water is injected into the water pipe through the water injection port to start the test.

[0021] The beneficial effects of the utility model are:

[0022] (1) Before installing the hollow package, the utility model can use the device to clean and dry the small hole. After cleaning, the brush head and the brush head connecting rod can be removed, and then the strain gauge cable of the hollow package is passed through the A end of the device box and the threaded through hole of the hollow rear cover. The humidity, temperature and depth in the small hole are measured in real time through the sensor group, thereby realizing the auxiliary installation of the hollow package strain gauge;

[0023] (2) In the prior art, the drill barrel rotates with the drill bit during the drilling process in a mine, so the following phenomenon occurs: when measuring data during the stress relief test, because the cable of the strain gauge is not hollowed and straightened in the hollow drill barrel, the cable rotates with the drill rod during the drilling process, and the cable is cut during the test, resulting in interruption of experimental data transmission, inability to measure complete experimental data, and thus failure of the experiment; the utility model fixes the strain gauge on the central axis of the device box to ensure the hollow straightened state, so that it will not rotate with the drill barrel, and the cable breakage can be avoided, thereby improving the success rate of the test;

[0024] (3) The utility model detects the humidity, temperature and depth of the small hole in real time through the sensor group, avoiding manual measurement operations and improving work efficiency;

[0025] (4) The utility model can reduce the workload before installing the hollow package, greatly improving work efficiency and accuracy; the device can continuously supply water through the water cavity, which can reduce dust concentration and ensure the safety of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the auxiliary device for installing the multifunctional three-way hollow package strain gauge;

[0027] In the figure, 1-brush head, 2-brush head connecting rod, 3-first vertical partition, 4-strain gauge cable, 5-sensor group, 6-second vertical partition, 7-load-bearing column, 8-first clamping piece, 9-second control switch, 10-water inlet, 11-threaded through hole, 12-hollow back cover, 13-computer, 14-data cable, 15-water retaining steel plate, 16-water cavity, 17-support column. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with specific implementation methods, but the protection scope of the present invention is not limited to the described contents.

[0029] Embodiment 1: A multifunctional three-way hollow body strain gauge installation auxiliary device (see Figure 1 ), including a device box and a strain gauge cable 4, the two ends of the device box along the axial direction are respectively A end and B end, the middle part of the device box is fixedly provided with an upper partition and a lower partition along the axial direction, the upper partition and the lower partition are both extended and fixed at the A end of the device box, the other end of the upper partition is fixedly connected to the top plate of the device box through the first vertical partition 3, a water cavity 16 is formed between the upper partition and the lower partition, a water injection port 10 connected to the water cavity 16 is opened on the top of the device box, the water injection port 10 is located between the first vertical partition 3 and the B end of the device box, the upper partition and A brush head connecting rod 2 is threadedly connected to the lower partition, and the brush head connecting rod 2 extends to the outside of the A end of the device box. A brush head 1 is installed at the end of the brush head connecting rod 2. A hollow rear cover 12 is fixedly provided at the B end of the device box. A threaded through hole 11 is opened in the center of the hollow rear cover 12. A strain gauge cable 4 is fixedly provided on the central axis of the device box, and the strain gauge cable 4 passes through the A end of the device box and the threaded through hole 11 of the hollow rear cover 12 in sequence; a sensor group 5 is fixedly provided at the A end of the device box, and the sensor group 5 is externally connected to a computer 13 through a data cable 14;

[0030] The sensor group 5 includes a humidity sensor, a temperature sensor and a depth measurement sensor. The probes of the humidity sensor, the temperature sensor and the depth measurement sensor are all extended to the outside of the A end of the device box. The humidity sensor, the temperature sensor and the depth measurement sensor are all connected to the computer via a data line 14.

[0031] The method for using the multifunctional three-way hollow package strain gauge installation auxiliary device has the following specific steps:

[0032] (1) When using the hollow enclosure method to measure geostress, after the large hole and the small hole for strain gauge installation are drilled, before installing the hollow strain gauge enclosure, install the cleaning brush head and the detachable brush head connecting rod respectively;

[0033] (2) Connect the drill rod to the threaded through hole of the hollow rear cover, move the device to the intersection of the large hole and the installation small hole, and insert the cleaning brush head into the small hole;

[0034] (3) The water pipe injects high-pressure water through the water injection port, and the high-pressure water flows into the small hole through the water cavity to clean the small hole;

[0035] (4) Remove the device from the large hole, disconnect the water pipe connected to the water inlet, replace the cleaning brush head with a drying brush head, and then insert it into the small hole to dry the small hole;

[0036] (5) The humidity, temperature and depth of the small hole are detected in real time by the sensor group. When the experimental conditions are met, the device is withdrawn from the large hole and a hollow package strain gauge is installed;

[0037] (6) Remove the dry brush head and the detachable brush head connecting rod, connect the water pipe to the water injection port, and send the device to the intersection of the large hole and the installation small hole. Before the strain gauge cable enters the hole, pass the strain gauge cable through the A end of the device box and the threaded through hole of the hollow rear cover in sequence, and fix it on the central axis of the device box to ensure the hollow straightened state; specifically, outside the hole, first pass the strain gauge cable through the A end of the device box and the threaded through hole of the hollow rear cover in sequence, and fix it on the central axis of the device box to ensure the hollow straightened state. After the strain gauge is installed into the small hole, start to install the device into the hole, the strain gauge is in the small hole, and the device is in the large hole;

[0038] (7) High-pressure water is injected into the water pipe through the water injection port to start the test.

[0039] Embodiment 2: The multifunctional three-way hollow enclosed body strain gauge installation auxiliary device of this embodiment has a basically identical structure to the multifunctional three-way hollow enclosed body strain gauge installation auxiliary device of embodiment 1, except that: a first electric telescopic rod perpendicular to the upper partition is provided on the upper partition, a second electric telescopic rod and a fourth electric telescopic rod perpendicular to the lower partition are provided on the lower partition, the central axes of the first electric telescopic rod and the second electric telescopic rod are located on the same vertical line, a third electric telescopic rod perpendicular to the top plate is provided on the top plate of the device box, the central axes of the third electric telescopic rod and the fourth electric telescopic rod are located on the same vertical line, the ends of the first electric telescopic rod, the second electric telescopic rod, the third electric telescopic rod and the fourth electric telescopic rod are respectively fixedly provided with a first magnetic buckle, a second magnetic buckle, a third magnetic buckle and a fourth magnetic buckle, the first magnetic buckle and the second magnetic buckle cooperate to form a first clamping member 8, the third magnetic buckle and the fourth magnetic buckle cooperate to form a second clamping member, and the strain gauge cable 4 is fixedly provided on the central axis of the device box through the first clamping member 8 and the second clamping member;

[0040] A first control switch and a second control switch 9 are fixedly arranged on the top plate of the device box, the first electric telescopic rod and the second electric telescopic rod are both electrically connected to the first control switch, and the third electric telescopic rod and the fourth electric telescopic rod are both electrically connected to the second control switch 9;

[0041] The first control switch can control the first electric telescopic rod and the second electric telescopic rod to extend synchronously, and the second control switch can control the third electric telescopic rod and the fourth electric telescopic rod to extend synchronously. The first magnetic buckle and the second magnetic buckle of the first clamping component 8 cooperate to fix the strain gauge cable 4, and the third magnetic buckle and the fourth magnetic buckle of the second clamping component cooperate to fix the strain gauge cable 4.

[0042] Embodiment 3: The structure of the multifunctional three-way hollow encasement strain gauge installation auxiliary device of this embodiment is basically the same as that of the multifunctional three-way hollow encasement strain gauge installation auxiliary device of embodiment 2, except that:

[0043] A force-bearing column 7 perpendicular to the upper partition is fixedly arranged in the middle of the upper partition, and the top of the force-bearing column 7 is fixedly arranged on the top plate of the device box. A second vertical partition 6 perpendicular to the lower partition is fixedly arranged in the middle of the lower partition, and the bottom end of the second vertical partition 6 is fixedly arranged on the bottom plate of the device box. The humidity sensor, the temperature sensor and the depth measurement sensor are arranged between the second vertical partition 6 and the A end surface of the device box. A support column 17 perpendicular to the lower partition is fixedly arranged at the end of the lower partition, and the bottom end of the support column 17 is fixedly arranged on the bottom plate of the device box; the second vertical partition 6 can both support the lower partition and isolate the water source to protect the humidity sensor, the temperature sensor and the depth measurement sensor;

[0044] The lower partition between the second vertical partition 6 and the support column 17 is a water retaining steel plate 15, the thickness of which is greater than that of the upper partition; the water retaining steel plate 15 is resistant to the impact of high-pressure water flow and can effectively prevent the backflow of high-pressure water.

[0045] The specific implementation modes of the present invention are described in detail above, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A multifunctional three-way hollow body strain gauge installation auxiliary device, characterized in that: The invention comprises a device box and a strain gauge cable (4), wherein the two ends of the device box along the axial direction are respectively an A end and a B end, an upper partition and a lower partition are fixedly arranged along the axial direction in the middle of the device box, the upper partition and the lower partition are both extended and fixed at the A end of the device box, the other end of the upper partition is fixedly connected to the top plate of the device box through a first vertical partition (3), a water cavity (16) is formed between the upper partition and the lower partition, a water injection port (10) connected to the water cavity (16) is provided at the top of the device box, the water injection port (10) is located between the first vertical partition (3) and the B end of the device box, and a threaded connection is provided on the upper partition and the lower partition. A brush head connecting rod (2) is provided, the brush head connecting rod (2) extends to the outside of the A end of the device box, a brush head (1) is installed at the end of the brush head connecting rod (2), a hollow rear cover (12) is fixedly provided at the B end of the device box, a threaded through hole (11) is provided at the center of the hollow rear cover (12), a strain gauge cable (4) is fixedly provided on the central axis of the device box, and the strain gauge cable (4) passes through the A end of the device box and the threaded through hole (11) of the hollow rear cover (12) in sequence; a sensor group (5) is fixedly provided at the A end of the device box, and the sensor group (5) is externally connected to a computer (13) via a data cable (14).

2. According to claim 1, the multifunctional three-way hollow body strain gauge installation auxiliary device is characterized in that: A first electric telescopic rod perpendicular to the upper partition is arranged on the upper partition, a second electric telescopic rod and a fourth electric telescopic rod perpendicular to the lower partition are arranged on the lower partition, the central axes of the first electric telescopic rod and the second electric telescopic rod are located on the same vertical line, a third electric telescopic rod perpendicular to the top plate is arranged on the top plate of the device box, the central axes of the third electric telescopic rod and the fourth electric telescopic rod are located on the same vertical line, the ends of the first electric telescopic rod, the second electric telescopic rod, the third electric telescopic rod and the fourth electric telescopic rod are respectively fixedly provided with a first magnetic buckle, a second magnetic buckle, a third magnetic buckle and a fourth magnetic buckle, the first magnetic buckle and the second magnetic buckle cooperate to form a first clamping part (8), the third magnetic buckle and the fourth magnetic buckle cooperate to form a second clamping part, and the strain gauge cable (4) is fixedly arranged on the central axis of the device box through the first clamping part (8) and the second clamping part.

3. According to claim 2, the multifunctional three-way hollow body strain gauge installation auxiliary device is characterized in that: A first control switch and a second control switch (9) are fixedly arranged on the top plate of the device box; the first electric telescopic rod and the second electric telescopic rod are both electrically connected to the first control switch; and the third electric telescopic rod and the fourth electric telescopic rod are both electrically connected to the second control switch (9).

4. According to claim 1, the multifunctional three-way hollow body strain gauge installation auxiliary device is characterized in that: A load-bearing column (7) perpendicular to the upper partition is fixedly arranged in the middle of the upper partition, and the top end of the load-bearing column (7) is fixedly arranged on the top plate of the device box. A second vertical partition (6) perpendicular to the lower partition is fixedly arranged in the middle of the lower partition, and the bottom end of the second vertical partition (6) is fixedly arranged on the bottom plate of the device box. A support column (17) perpendicular to the lower partition is fixedly arranged at the end of the lower partition, and the bottom end of the support column (17) is fixedly arranged on the bottom plate of the device box.

5. The multifunctional three-way hollow body strain gauge installation auxiliary device according to claim 4 is characterized in that: The lower partition between the second vertical partition (6) and the support column (17) is a water retaining steel plate (15), and the thickness of the water retaining steel plate (15) is greater than the thickness of the upper partition.

6. The multifunctional three-way hollow body strain gauge installation auxiliary device according to claim 1 is characterized in that: The sensor group (5) includes a humidity sensor, a temperature sensor and a depth measurement sensor. The probes of the humidity sensor, the temperature sensor and the depth measurement sensor all extend outside the A end of the device box. The humidity sensor, the temperature sensor and the depth measurement sensor are all connected to an external computer via a data line (14).

Images