CN221568454U - Ground stress measuring device for plug-in type stress relief method - Google Patents
Ground stress measuring device for plug-in type stress relief method Download PDFInfo
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- CN221568454U CN221568454U CN202420245459.7U CN202420245459U CN221568454U CN 221568454 U CN221568454 U CN 221568454U CN 202420245459 U CN202420245459 U CN 202420245459U CN 221568454 U CN221568454 U CN 221568454U
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Abstract
The utility model provides a ground stress measuring device for an insertion type stress relief method, which comprises a bowl-shaped base with an opening at the bottom, wherein a plurality of through holes are formed in the side surface of the base, round tubes are arranged at corresponding positions of the through holes, limit components are arranged on the round tubes, a conical probe matched with the limit components is inserted into the base, a three-stage groove matched with the limit components is formed in the probe, an annular strain gauge is fixed on the probe, the annular strain gauge is connected with a wireless transmission module, and the ground stress measuring device further comprises a wireless receiving module for receiving signals of the wireless transmission module. The bowl-shaped base is convenient to place the base into the underground hole by adopting the push rod, the base is uniformly provided with the through holes and the round tubes for installing the limiting component, the limiting component is used for fixing the probe, the wireless transmission module is arranged on the probe, and the wireless receiving module for receiving signals of the wireless transmission module is correspondingly arranged on the probe, so that the ground stress measuring device is formed and used for detecting the ground stress and the ground stress change of the underground hole.
Description
Technical Field
The utility model belongs to the technical field of ground stress measuring devices, and particularly relates to a ground stress measuring device for an insertion type stress relief method.
Background
There are several potential hazards in the coal mining process, namely gas, water, fire, rock burst, etc., which are detrimental to the life safety of underground workers and the service life of equipment. In order to cope with the damage caused by rock burst, the existing research direction is to predict and prevent the rock burst by detecting and analyzing the ground stress of the underground of a mining area. The existing method for detecting the ground stress is divided into a stress recovery method, a stress relief method, a strain recovery method, a strain relief method and the like according to different measurement principles. There are also two main categories of measurement methods, direct measurement and indirect measurement. The research of the ground stress is not only used in the mining field, but also in the fields of water conservancy and hydropower, civil engineering, railway and highways and the like, and the damage caused by the ground stress is required to be prevented, controlled and detected.
The existing hollow inclusion stress measuring method is that the hollow inclusion sensor is pushed into the hole through the push rod, glue in the inclusion is extruded through extrusion, and the sensor can be fixed in the hole after the glue is solidified through extrusion. After the fixing, the measured stress data are transmitted out through the electric wire. However, the conditions in the underground holes are generally complex, and the flowing water can influence the solidification of the glue so as to separate the strain gauge from the original position; sand may disrupt the transmission of the wire. If no corresponding measures are taken, the availability and the data accuracy of the hollow bag body are greatly reduced. If the hole is unusable or the equipment is damaged, the cost input is increased. In all respects a new device is needed to make the measurement of the ground stress.
Therefore, there is a need for a stress measuring device for a plug-in stress relief method.
Disclosure of utility model
The technical problem to be solved by the utility model is to provide a stress measuring device for a plug-in type stress relief method aiming at the defects of the prior art. The device is convenient for adopt the push rod to place the base into underground hole in the setting bowl form base, is used for installing spacing subassembly through evenly having seted up a plurality of through-holes and pipe on the base, is used for fixed probe through setting up spacing subassembly, through setting up wireless transmission module on the probe to correspond the wireless receiving module that sets up the receiving wireless transmission module signal, form the earth stress measuring device, be used for detecting the earth stress and the earth stress variation of underground hole.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a plug-in stress relief method ground stress measuring device, its characterized in that, this ground stress measuring device includes the bowl form base of bottom trompil, a plurality of through-holes have evenly been seted up to the base side, every through-hole corresponds the position and all is provided with the pipe in the base, every all install spacing subassembly on the pipe, insert in the base with spacing subassembly complex cone probe, set up on the probe with spacing subassembly complex tertiary recess, tertiary recess includes three annular groove, be fixed with annular strain gauge on the annular groove, annular strain gauge is connected with wireless transmission module, ground stress measuring device still includes the wireless receiving module who receives wireless transmission module signal.
The ground stress measuring device for the plug-in type stress relief method is characterized in that the limiting component comprises a spring arranged in a circular tube, a guide rod penetrating through the spring is further arranged in the circular tube, a ball head with the diameter larger than that of the spring is arranged at one end, extending out of the spring, of the guide rod, and an arc-shaped sheet is arranged at one end, extending out of the base, of the guide rod.
The ground stress measuring device for the plug-in type stress relief method is characterized in that the axis of the probe is provided with wire holes, and each annular groove is provided with three round holes communicated with the wire holes.
The above-mentioned earth stress measuring device of plug-in stress relief method, characterized by, the great one end of probe diameter is provided with the drum installed part, install wireless transmission module on the drum installed part.
The ground stress measuring device for the plug-in type stress relief method is characterized in that the annular strain gauge is connected with an electric wire, and the electric wire sequentially passes through the round hole and the electric wire hole and is connected with the wireless transmission module.
The stress measuring device for the inserted stress relief method is characterized in that the annular strain gauge is adhered to the annular groove through epoxy resin.
The stress measuring device for the plug-in type stress relief method is characterized in that the number of the through holes is three.
Compared with the prior art, the utility model has the following advantages:
1. The bowl-shaped base is convenient to place the base into the underground hole by adopting the push rod, the base is uniformly provided with the through holes and the round tubes for installing the limiting component, the limiting component is used for fixing the probe, the wireless transmission module is arranged on the probe, and the wireless receiving module for receiving signals of the wireless transmission module is correspondingly arranged on the probe, so that the ground stress measuring device is formed and used for detecting the ground stress and the ground stress change of the underground hole.
2. The ground stress measuring device is used for the test of the stress relief method, is fixed by gel in the past, achieves the required effect through a mechanical structure, has a simple structure and convenient use, can be used in various geological environments, and transmits acquired data to a receiving terminal through a wireless transmission module, so that the real-time detection of ground stress data is realized, redundant wire transmission data is canceled, and the wire is prevented from being damaged in the complex geological environment.
3. According to the utility model, three-level grooves are formed in the probe for grading treatment, when the probe is inserted into the base, a proper clamping position can be selected according to the width of the underground hole, so that the probe can be tightly combined with the base in various geological environments, the annular groove with smaller radius at the front end of the probe is combined with the base when the geological environment is harder, the annular groove with larger radius at the rear end of the probe is combined with the base when the geological environment is softer, and the accuracy of ground stress measurement is ensured.
The technical scheme of the utility model is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic view of the structure of the inventive crustal stress measuring device.
FIG. 2 is a schematic diagram of the connection between the base and the spacing assembly of the inventive crustal stress measuring device.
Fig. 3 is a cross-sectional view A-A of fig. 2.
Fig. 4 is a schematic structural view of a limiting assembly of the inventive ground stress measuring device.
Fig. 5 is a schematic structural view of a probe of the inventive crustal stress measuring device.
Fig. 6 is a B-B cross-sectional view of fig. 5.
Reference numerals illustrate:
1-a base; 1-1 parts of a circular tube; 2-a limiting component;
2-1-a spring; 2-guide rod; 2-3-ball head;
2-4 arc-shaped sheets; 3-a probe; 3-1 to three stages of grooves;
3-2-wire holes; 3-round holes; 3-4-cylinder mount;
4-annular strain gage; 5-wireless transmission module.
Detailed Description
As shown in fig. 1 to 6, the ground stress measuring device for the plug-in type stress relief method comprises a bowl-shaped base 1 with an opening at the bottom, a plurality of through holes are uniformly formed in the side surface of the base 1, round tubes 1-1 are arranged at corresponding positions of all through holes in the base 1, a limit component 2 is arranged on each round tube 1-1, a conical probe 3 matched with the limit component 2 is inserted into the base 1, a three-stage groove 3-1 matched with the limit component 2 is formed in the probe 3, the three-stage groove 3-1 comprises three annular grooves, annular strain gauges 4 are fixed on the annular grooves, the annular strain gauges 4 are connected with a wireless transmission module 5, and the ground stress measuring device further comprises a wireless receiving module for receiving signals of the wireless transmission module 5.
It should be noted that, through setting up bowl form base 1 and forming bearing structure, be convenient for adopt the push rod simultaneously to place base 1 into underground hole in, be used for installing spacing subassembly 2 through evenly having seted up a plurality of through-holes and pipe 1-1 on base 1, be used for fixed probe 3 through setting up spacing subassembly 2, through setting up wireless transmission module 5 on probe 3 to correspond the wireless receiving module that sets up the receiving wireless transmission module 5 signal, form the earth stress measuring device for detect underground hole's earth stress and earth stress variation.
It should be noted that, through the trompil in base 1 bottom, be convenient for probe 3 penetrates to the inside diameter of bottom trompil equals with the size of probe 3 external diameter, ensures that probe 3 advances base 1 back two and is concentric, guarantees the accuracy of measured data.
It should be noted that, through setting up tertiary recess 3-1 on probe 3 and carrying out hierarchical processing, when probe 3 inserts base 1, can select suitable dress card position according to the width of underground hole, guarantee that it can both combine closely with base 1 in various geological environment, the annular groove that probe 3 front end radius is less combines with base 1 when geological environment is harder, the annular groove that probe 3 rear end radius is great combines with base 1 when geological environment is softer, has guaranteed the accuracy of ground stress measurement.
It should be noted that, by fixing the annular strain gauge 4 on the annular groove, when there is a stress change in the underground hole, the stress is transmitted to the annular strain gauge 4 through the limiting component 2, the annular strain gauge 4 transmits a signal to the wireless transmission module 5, and then the wireless receiving module is transmitted, so as to detect the ground stress and the ground stress change of the underground hole.
The ground stress measuring device is used for the test of the stress relief method, is different from the conventional method that gel is needed for fixation, achieves the required effect through a mechanical structure, has a simple structure, is convenient to use, can be used in various geological environments, and can be used for transmitting acquired data to a receiving terminal through a wireless transmission module 5 so as to realize real-time detection of ground stress data.
It should be noted that, the model of the wireless sensing module 5 and the wireless receiving module is a810C-L400M30 wireless data transmission station.
As shown in fig. 2 to 4, in this embodiment, the limiting component 2 includes a spring 2-1 installed in a circular tube 1-1, a guide rod 2-2 passing through the spring 2-1 is further provided in the circular tube 1-1, a ball head 2-3 with a diameter larger than that of the spring 2-1 is provided at an end of the guide rod 2-2 extending out of the spring 2-1, and an arc-shaped piece 2-4 is installed at an end of the guide rod 2-2 extending out of the base 1. The round tube 1-1 is arranged to limit the guide rod 2-2, the guide rod 2-2 is prevented from being deviated, the spring 2-1 which is in contact with the ball head 2-3 is sleeved in the base 1 of the guide rod 2-2 to enable the guide rod 2-2 to form an elastic structure, the guide rod 2-2 always tends to the center position of the base 1 under the condition of no external force, the ball head 2-3 is jacked into the most suitable annular groove in the three-stage groove 3-1 after the probe 3 is inserted, the probe 3 is clamped, the contact area with the hole wall of the underground hole is increased by arranging the arc-shaped piece 2-4, and the ground stress in the underground hole and the ground stress change are transmitted to the annular strain piece 4 through the guide rod 2-2.
It should be noted that the diameters of the ball heads 2-3 are consistent with the widths of the three annular grooves in the three-stage groove 3-1, so that the ball heads 2-3 and the three-stage groove 3-1 are tightly combined.
It should be noted that, the aperture of the through hole is smaller than the inner diameter of the circular tube 1-1, the diameter of the spring 2-1 is larger than the aperture of the through hole and smaller than the inner diameter of the circular tube 1-1, and the diameter of the guide rod 2-2 is attached to the inner diameter of the circular tube 1-1 as much as possible, so that the measured data is prevented from being mistaken due to shaking of the guide rod 2-2.
In this embodiment, as shown in fig. 5 and 6, the axis of the probe 3 is provided with an electric wire hole 3-2, and each annular groove is provided with three circular holes 3-3 communicated with the electric wire hole 3-2. Through set up electric wire hole 3-2 and with electric wire hole 3-3 of 3-2 intercommunication, be convenient for penetrate annular foil gage 4 electric wire and be connected with wireless transmission module 5, be convenient for the electric wire even be connected with annular foil gage 4 through the quantity of control round hole 3-3, improve detection performance.
As shown in fig. 5 and 6, in the present embodiment, the larger diameter end of the probe 3 is provided with a cylindrical mounting member 3-4, and the wireless transmission module 5 is mounted on the cylindrical mounting member 3-4. The placement of the barrel mount 3-4 facilitates the feeding of the probe 3 into the subterranean hole.
As shown in fig. 5 and 6, in the present embodiment, the annular strain gauge 4 is connected with an electric wire passing through the circular hole 3-3 and the electric wire hole 3-2 in order and connected with the wireless transmission module 5. The signal received by the annular strain gauge 4 is transmitted to the wireless transmission module 5 by arranging an electric wire.
In this embodiment, the annular strain gage 4 is adhered to the annular groove by epoxy resin. The annular strain gauge 4 is stuck on the three annular grooves included in the three-stage groove 3-1, so that the annular strain gauge 4 is conveniently fixed, and the detection performance of the annular strain gauge 4 is not affected.
In this embodiment, the number of through holes is three. Through the quantity of control through-hole, the quantity of control spacing subassembly 2 has guaranteed the dress card effect to probe 3, has also guaranteed the detection effect simultaneously.
It should be noted that, three through holes correspond to three limiting components 2, and an inscribed circle formed by three ball heads 2-3 of the three limiting components 2 is concentric with an inner wall circle of the base 1.
In actual use, firstly, respectively casting inner layers with the thickness of 3mm on three annular grooves by using epoxy resin, then placing three annular strain gauges 4 on the inner layers, leading out wires from round holes 3-3 to be connected with a wireless transmission module 5, and casting outer layers with the thickness of 3mm on the annular grooves by using epoxy resin to form a probe 3;
Step two, holes are formed in the positions of the measuring points, so that the installation positions of the stress measuring devices are not affected by engineering disturbance, and the holes are cleaned by water;
Step three, pushing the base 1 into the bottom of the hole slowly by using a push rod, and slowly withdrawing the push rod;
Step four, slowly pushing the probe 3 into the hole by using a push rod, and after the probe 3 is contacted with the ball head 2-3 of the limiting component 2 on the base 1, forcibly pushing the push rod to prop the guide rod 2-2 open, so that one side of the ball head 2-3 of the guide rod 2-2 is clamped with the most suitable annular groove on the probe 3, and the arc-shaped piece 2-4 on the other side of the guide rod 2-2 is tightly combined with the hole wall;
and fifthly, continuously receiving the data measured by the wireless transmission module 5 through the wireless receiving module, detecting the ground stress and the ground stress change of the underground hole, and being simple and convenient to operate and convenient to popularize and apply.
The above description is only of the preferred embodiments of the present utility model, and is not intended to limit the present utility model. Any simple modification, variation and equivalent variation of the above embodiments according to the technical substance of the present utility model still fall within the protection scope of the technical solution of the present utility model.
Claims (7)
1. The utility model provides a plug-in stress relief method ground stress measuring device, its characterized in that, this ground stress measuring device includes bowl form base (1) of bottom trompil, a plurality of through-holes have evenly been seted up to base (1) side, every through-hole corresponds the position and all is provided with pipe (1-1) in base (1), every spacing subassembly (2) are all installed on pipe (1-1), insert in base (1) with spacing subassembly (2) complex toper probe (3), set up on probe (3) with spacing subassembly (2) complex tertiary recess (3-1), tertiary recess (3-1) include three annular groove, be fixed with annular strain gauge (4) on the annular groove, annular strain gauge (4) are connected with wireless transmission module (5), ground stress measuring device still includes the wireless receiving module of receiving wireless transmission module (5) signal.
2. The device for measuring the ground stress by the plug-in type stress relief method according to claim 1, wherein the limiting component (2) comprises a spring (2-1) installed in a circular tube (1-1), a guide rod (2-2) penetrating through the spring (2-1) is further arranged in the circular tube (1-1), a ball head (2-3) with the diameter larger than that of the spring (2-1) is arranged at one end, extending out of the spring (2-1), of the guide rod (2-2), and an arc-shaped sheet (2-4) is installed at one end, extending out of the base (1), of the guide rod (2-2).
3. The device for measuring the ground stress by the plug-in type stress relief method according to claim 1, wherein the axis of the probe (3) is provided with an electric wire hole (3-2), and each annular groove is provided with three round holes (3-3) communicated with the electric wire hole (3-2).
4. A device for measuring earth stress by plug-in type stress relief according to claim 1, characterized in that the larger diameter end of the probe (3) is provided with a cylindrical mounting member (3-4), and the cylindrical mounting member (3-4) is provided with a wireless transmission module (5).
5. A device for measuring earth stress by plug-in stress relief according to claim 1, characterized in that said annular strain gauge (4) is connected with an electric wire passing through the hole (3-3) and the hole (3-2) in sequence and connected with a wireless transmission module (5).
6. A stress measuring device according to claim 1, characterized in that the annular strain gauge (4) is glued to the annular groove by means of epoxy.
7. The apparatus according to claim 1, wherein the number of the through holes is three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420245459.7U CN221568454U (en) | 2024-02-01 | 2024-02-01 | Ground stress measuring device for plug-in type stress relief method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420245459.7U CN221568454U (en) | 2024-02-01 | 2024-02-01 | Ground stress measuring device for plug-in type stress relief method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221568454U true CN221568454U (en) | 2024-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420245459.7U Active CN221568454U (en) | 2024-02-01 | 2024-02-01 | Ground stress measuring device for plug-in type stress relief method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221568454U (en) |
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- 2024-02-01 CN CN202420245459.7U patent/CN221568454U/en active Active
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