CN204679028U - Direct-sticking hole wall strain gauge - Google Patents
Direct-sticking hole wall strain gauge Download PDFInfo
- Publication number
- CN204679028U CN204679028U CN201520448335.XU CN201520448335U CN204679028U CN 204679028 U CN204679028 U CN 204679028U CN 201520448335 U CN201520448335 U CN 201520448335U CN 204679028 U CN204679028 U CN 204679028U
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- sealing
- outside surface
- sebific duct
- liquid
- hole
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Abstract
The utility model relates to for straining in ground, mine engineering, press the device technique field of measurement, be specifically a kind of direct-sticking hole wall strain gauge.It comprises body and the mounting rod for pushing body, and body comprises measuring circuit and the sealing of hole seat sequentially connected, connecting pipe, pedestal, appearance sebific duct, and sealing of hole seat is provided with the swollen capsule of the first liquid; The outside surface covering holding sebific duct around the second intake chute and part has the swollen capsule of flexible second liquid; The outside surface of sealing of hole seat is provided with shutoff ring; First inlet opening and the second inlet opening are interconnected by connecting pipe; For injecting the interval of tested boring for glue between sealing of hole seat right-hand member and pedestal left end; Hold sebific duct right-hand member and be slidably socketed with piston rod; Some strain rosettes of measuring circuit are located at the swollen capsule outside surface of the second liquid.The utility model has foil gauge with hole wall for directly to contact, and is mounted to the advantage that motility rate is high.
Description
Technical field
The utility model relates to for straining in ground, mine engineering, press the device technique field of measurement, be specifically a kind of direct-sticking hole wall strain gauge.
Background technology
Hole wall strain is In-situ rock stress measurement, digging dynamic pressure test, rock-burst monitoring, coal and gas prominent monitoring core index, for ground and mine construction very important.
At present, the strain of congenerous, stress measuring equipment comprise hollow inclusion, borehole stressmeter two kinds, its hollow core inclusion comprises 9 dress foil gauges, 13 dress foil gauges and 12 dress foil gauges three kinds, before installation, monitor strain sheet is embedded in hollow hoses outside, with the fixing clearance of resin secondary potting hollow flexible pipe and hole wall during installation, because foil gauge and hole wall are non-direct contact, stress resolves the middle impact need considering Compartmentalized resin, adds difficulty in computation and measuring error; Snap in shutoff resin in hole with rubber ring during installation, as hole wall infiltration or too coarsely can form embedding hole, even resin runs off, and is mounted to motility rate not high.
Utility model content
The purpose of this utility model there are the problems referred to above for existing technology, proposes a kind of foil gauge with hole wall for directly to contact, be mounted to the direct-sticking hole wall strain gauge that motility rate is high.
The purpose of this utility model realizes by following technical proposal:
A kind of direct-sticking hole wall strain gauge, it comprises body and the mounting rod for pushing body, body comprises measuring circuit and the sealing of hole seat sequentially connected, connecting pipe, pedestal, appearance sebific duct, sealing of hole seat be provided with sequentially be communicated with the first inlet opening, the first delivery hole, be located at the first intake chute of the annular of the outside surface of sealing of hole seat, cover around the first intake chute and there is the swollen capsule of flexible first liquid, to make to form the first sealed expansion chamber between the swollen capsule of the first liquid and the first intake chute on the outside surface that the sealing of the two ends of the first liquid swollen capsule is fixed on sealing of hole seat; Pedestal be provided with sequentially be communicated with the second inlet opening, the second delivery hole, be located at the second intake chute of the annular of the outside surface of pedestal, the outside surface covering holding sebific duct around the second intake chute and part has the swollen capsule of flexible second liquid, the left end sealing of the swollen capsule of the second liquid is fixed on the outside surface being positioned on the left of the second intake chute of pedestal, the right-hand member sealing of the swollen capsule of the second liquid be fixed on hold sebific duct outside surface on, form the second sealed expansion chamber between the outside surface that the swollen capsule of the second liquid and the second described intake chute and part hold sebific duct; The outside surface of sealing of hole seat is provided with shutoff ring, and shutoff ring is positioned at the right side of the swollen capsule of the first liquid; First inlet opening and the second inlet opening are interconnected by connecting pipe; For injecting the interval of tested boring for glue between sealing of hole seat right-hand member and pedestal left end, pedestal is provided with leads glue through hole connection interval and holds both sebific ducts; Hold sebific duct right-hand member and be slidably socketed with one for extruding the piston rod holding the glue in sebific duct and move to interval; Some strain rosettes of measuring circuit are located at the swollen capsule outside surface of the second liquid.
Compared with prior art, the utility model has the following advantages:
The utility model is using liquid as pump pressure medium, such as water, omnidistance closed, first, glue is injected the gap being arranged in shutoff ring right part between tested boring and body by interval by piston rod, then pumping liquid makes the swollen capsule of the first liquid and the swollen capsule of the second liquid rise swollenly to carry out shutoff and location, like this, avoid the formation of embedding hole, even resin runs off, simultaneously, the some strain rosettes being located at the second liquid swollen capsule outer surface measuring circuit will rise on the swollen hole wall being attached to tested boring along with the swollen capsule of the second liquid, after glue solidification, described some strain rosettes are just stably fixed on the hole wall of tested boring, to sum up, the utility model has foil gauge with hole wall for directly to contact, be mounted to the advantage that motility rate is high.
As improvement, measuring circuit comprises circumference and is distributed on three group of four strain rosette on chip of the second liquid swollen capsule outside surface and is embedded in temperature compensation and the zeroing strain rosette of the same sensitivity coefficient in the tail chamber of sealing of hole seat, each strain rosette is electrically connected with 15 core shielding lines respectively, 15 core shielding lines are through being located at the first cable aperture pull-out of sealing of hole seat outside, like this, the synperiodic porous of single strainmeter can be realized measure.
As improvement, mounting rod comprises the directional connected shrink that be connected removable with the left part of sealing of hole seat, directional connected shrink inside is provided with the second cable aperture and sebific duct hole, directional connected shrink inside is also provided with the solid pipe screw in the through sebific duct hole of laterally splitting, Gu be provided with the solid pipe screw for fixing fluid injection sebific duct in pipe screw, directional connected shrink right-hand member is provided with guide slot, the left part of sealing of hole seat is provided with the orienting pin be slidably matched with guide slot, like this, in installation, 15 core shielding lines and fluid injection sebific duct are all protected in mounting rod, to avoid in installation hole wall to the scraping of the two, be provided with solid pipe screw, ensure that fluid injection sebific duct reliably exiting with body adapter sleeve.
As improvement, first inlet opening two ends are threaded two copper pipes respectively, be designated as left copper pipe and right copper pipe, right copper pipe is described connecting pipe, the left part of described left copper pipe and the grafting of fluid injection sebific duct, and the right part of described right copper pipe is threaded with the second inlet opening, the outside surface of sealing of hole seat is sequentially provided with the first binding groove, the first intake chute, the second binding groove, the shutoff annular groove that are annular from left to right, like this, compact conformation is simple and reliable, and cost is low.
As improvement, the outside surface of pedestal is provided with the 3rd binding groove of annular, and the outside surface that described part holds sebific duct is provided with the 4th annular binding groove, 3rd binding groove, the second intake chute, the 4th binding groove sequentially distribute from left to right, like this, compact conformation is simple and reliable, and cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 be in Fig. 1 A-A to sectional view;
Fig. 3 be in Fig. 1 B-B to sectional view;
Fig. 4 is the structural representation of sealing of hole seat;
Fig. 5 is the structural representation of pedestal;
Fig. 6 is the structural representation holding sebific duct;
Fig. 7 is the schematic diagram filling in tested boring;
To be piston rod inject the schematic diagram being arranged in the gap of shutoff ring right part between tested boring and body by glue by interval to Fig. 8;
Fig. 9 is that pumping liquid makes the swollen capsule of the first liquid and the swollen capsule of the second liquid play the swollen schematic diagram carrying out shutoff and location;
Shown in figure, 1, mounting rod, 2, sealing of hole seat, 3, connecting pipe, 4, pedestal, 5, hold sebific duct, 6, first inlet opening, 7, first delivery hole, 8, first intake chute, 9, the swollen capsule of first liquid, 10, second inlet opening, 11, second delivery hole, 12, second intake chute, 13, the swollen capsule of second liquid, 14, shutoff ring, 15, tested boring, 16, interval, 17, lead glue through hole, 18, glue, 19, piston rod, 20, four strain rosettes on chip, 21, tail chamber, 22, temperature compensation and zeroing strain rosette, 23, 15 core shielding lines, 24, first cable aperture, 25, directional connected shrink, 26, second cable aperture, 27, sebific duct hole, 28, Gu pipe screw, 29, Gu pipe screw, 30, guide slot, 31, orienting pin, 32, left copper pipe, 33, first binding groove, 34, second binding groove, 35, shutoff annular groove, 36, 3rd binding groove, 37, 4th binding groove, 38, iron hoop silk, 39, resin, 40, strain yarn group, 41, can cut off, 42, fixed pin, 43, guide head, 44, fluid injection sebific duct.
Embodiment
Be below specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
The direct-sticking hole wall strain gauge that the present embodiment provides, it comprises body and the mounting rod 1 for pushing body, the sealing of hole seat 2 that body comprises measuring circuit and sequentially connects, connecting pipe 3, pedestal 4, hold sebific duct 5, sealing of hole seat 2 is provided with the first inlet opening 6 be sequentially communicated with, first delivery hole 7, be located at the first intake chute 8 of the annular of the outside surface of sealing of hole seat 2, cover around the first intake chute 8 and there is the swollen capsule 9 of flexible first liquid, to make to form the first sealed expansion chamber between the swollen capsule 9 of the first liquid and the first intake chute 8 on the outside surface that the two ends sealing of the swollen capsule of the first liquid 9 is fixed on sealing of hole seat 2, pedestal 4 is provided with the second inlet opening 10, second delivery hole 11 be sequentially communicated with, the second intake chute 12 being located at the annular of the outside surface of pedestal 4, the outside surface covering holding sebific duct 5 around the second intake chute 12 and part has the swollen capsule 13 of flexible second liquid, the left end sealing of the swollen capsule 13 of the second liquid is fixed on the outside surface being positioned on the left of the second intake chute 12 of pedestal 4, the right-hand member sealing of the swollen capsule 13 of the second liquid be fixed on hold sebific duct 5 outside surface on, form the second sealed expansion chamber between the outside surface that the swollen capsule of the second liquid 13 and the second described intake chute 12 and part hold sebific duct 5, the outside surface of sealing of hole seat 2 is provided with shutoff ring 14, and shutoff ring 14 is positioned at the right side of the swollen capsule 9 of the first liquid, first inlet opening 6 and the second inlet opening 10 are interconnected by connecting pipe 3, for injecting the interval 16 of tested boring 15 for glue 18 between sealing of hole seat 2 right-hand member and pedestal 4 left end, pedestal 4 is provided with leads glue through hole 17 and is communicated with interval 16 and holds both sebific ducts 5, hold sebific duct 5 right-hand member and be slidably socketed with one for extruding the piston rod 19 holding the glue 18 in sebific duct 5 and move to interval 16, some strain rosettes of measuring circuit are located at the second liquid swollen capsule 13 outside surface.
Shutoff ring 14 adopts rubber ring.
Measuring circuit comprises circumference and is distributed on three group of four strain rosette 20 on chip of the second liquid swollen capsule 13 outside surface and is embedded in temperature compensation and the zeroing strain rosette 22 of the same sensitivity coefficient in the tail chamber 21 of sealing of hole seat 2, each strain rosette is electrically connected with 15 core shielding lines 23 respectively, and first cable aperture 24 of 15 core shielding lines 23 through being located at sealing of hole seat 2 pulls out outside; Sealing resin 39 in tail chamber 21, plays fixing or sealing function to correlated parts in tail chamber 21; Three group of four strain rosette 20 on chip is electrically connected with 15 core shielding lines 23 by the strain yarn group 40 through super-interval 16.
Mounting rod 1 comprises the directional connected shrink 25 that be connected removable with the left part of sealing of hole seat 2, directional connected shrink 25 inside is provided with the second cable aperture 26 and sebific duct hole 27, directional connected shrink 25 inside is also provided with the solid pipe screw 28 in the through sebific duct hole 27 of laterally splitting, Gu be provided with the solid pipe screw 29 for fixing fluid injection sebific duct 23 in pipe screw 28, directional connected shrink 25 right-hand member is provided with guide slot 30, and the left part of sealing of hole seat 2 is provided with the orienting pin 31 be slidably matched with guide slot 30.
First inlet opening 6 two ends are threaded two copper pipes respectively, be designated as left copper pipe 32 and right copper pipe, right copper pipe is described connecting pipe 3, the left part of described left copper pipe 32 and fluid injection sebific duct 23 grafting, the right part of described right copper pipe is threaded with the second inlet opening 10, and the outside surface of sealing of hole seat 2 is sequentially provided with the first binding groove 33, first intake chute 8, second binding groove 34, the shutoff annular groove 35 that are annular from left to right.
The outside surface of pedestal 4 is provided with the 3rd binding groove 36 of annular, and the outside surface of described part appearance sebific duct 5 is provided with the 4th binding groove the 37, three binding groove 36, second intake chute 12 of annular, the 4th binding groove 37 sequentially distributes from left to right.
In the tail chamber 21 of sealing of hole seat 2, embedding in advance has the cross resistance-type strain rosette as temperature compensation and zeroing strain rosette 22, its sensitivity coefficient is identical with four strain rosettes 20 on chip, thus form total 15 core 14 circuit, because general space of components is less, 15 core shielding lines 23 select the zinc-plated shielded cable of 15 core of path (external diameter 5.7mm).With temperature compensation sheet, foil gauge to be measured and two same value measuring resistance composition resistance bridges before first measurement, after circuit zeroing, replace with the foil gauge that returns to zero the zeroing value that foil gauge to be measured writes down corresponding path.Later stage when measuring at every turn, first with temperature compensation sheet, zeroing foil gauge and two same value measuring resistance composition resistance bridges, the zeroing knob of adjustment strainmeter is to the zeroing value previously write down, the zeroing then achieving former path recovers, and the same cycle porous strain measurement then can carrying out same strainmeter is used.
Sealing of hole seat 2, pedestal 4, each binding groove held on the outside surface of sebific duct 5 tie up the swollen capsule of closed each liquid with iron hoop silk 38, the swollen capsule of swollen liquid can be played after pumping into dielectric fluid, and then sealing of hole, centering sticky note back pressure is provided, installation reliability greatly improves, if do not need to withdraw fluid injection sebific duct 44, then pipe screw 29 need not be tightened admittedly, can install retaining valve with omnidistance pressurize on fluid injection sebific duct 44, has the function that closed monitor strain flower prevents the weathering of resin colloid.
The left end holding sebific duct 5 offers the first pin-and-hole installing fixed pin 42, fixed pin 42 makes pedestal 4 and holds sebific duct 5 to link together, the right-hand member holding sebific duct 5 offers the second pin-and-hole installed and can cut off 41,41 can be cut off before laterally cutting off, hold sebific duct 5 and piston rod 19 for being fixedly connected with, guide head 43 arrives at and can cut off 41 after at the bottom of hole and cut off, glue 18 is clamp-oned gap near hole wall by piston rod 19, and namely glue is injected the gap being arranged in shutoff ring right part between tested boring and body by interval by piston rod; Glue 18 is for pasting resin.
As accompanying drawing 7 to accompanying drawing 9, for representing succinct, Reference numeral simplifies, and most of Reference numeral does not mark, direct-sticking hole wall strain gauge installation process can be subdivided into feeding stage, extruding glue 18 stage and play the swollen stickup stage, can exit mounting portion by pull mounting rod 1 after glue 18 hardens.
The top layer of mounting rod 1 is thin-wall stainless steel, each copper pipe is the copper pipe of external diameter 6mm, each liquid is swollen, and capsule is butyl sebific duct, directional connected shrink 25, sealing of hole seat 2, pedestal 4, piston rod 19 process for lightweight aluminium bar or perspex bar, three group of four strain rosette 20 on chip is mutually 120 ° of sticky notes along the second liquid swollen capsule 13 outside surface, namely circumferential uniform; 41 can be cut off and can select wooden stick, toothpick or aluminum steel; Remaining part is GB handware.
Compared with prior art, the direct-sticking hole wall strain gauge that the present embodiment provides has the following advantages:
1. the utility model has 15 line, 14 line constructions, possesses temperature compensation and zeroing function, can realize single strainmeter and measure with cycle porous, be particularly suitable for needing to strain carry out the dynamic pressure of multiple spot monitoring, monitoring rock burst, in coal and gas outburst prominent controlling engineering.
2. change the filling type with no pressure of hollow inclusion stress gauge to be installed as and of the present utility modelly to have the mounted installation of densification, more applicable for the boring that infiltration is holed or hole wall is comparatively coarse, avoid the impact straining and resolve middle resin bed with stress, difficulty in computation and error greatly reduce simultaneously;
3. installing requires not strict to colloidal volume, avoid perfusion hole, colloid run off, sealing of hole not sternly on being mounted to motility rate impact, the swollen capsule of the first liquid 9 and the swollen capsule of the second liquid 13 play swollen play simultaneously location with one heart, have pressure viscosity note, shutoff prevent glue from solidifying after the effect of colloid weathering.
specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Claims (5)
1. a direct-sticking hole wall strain gauge, it comprises body and the mounting rod (1) for pushing body, the sealing of hole seat (2) that body comprises measuring circuit and sequentially connects, connecting pipe (3), pedestal (4), hold sebific duct (5), it is characterized in that, sealing of hole seat (2) is provided with the first inlet opening (6) be sequentially communicated with, first delivery hole (7), be located at first intake chute (8) of the annular of the outside surface of sealing of hole seat (2), cover around the first intake chute (8) and there is the swollen capsule of flexible first liquid (9), to make to form the first sealed expansion chamber between the swollen capsule of the first liquid (9) and the first intake chute (8) on the outside surface that the two ends sealing of the swollen capsule of the first liquid (9) is fixed on sealing of hole seat (2), pedestal (4) is provided with the second inlet opening (10) be sequentially communicated with, second delivery hole (11), be located at second intake chute (12) of the annular of the outside surface of pedestal (4), the outside surface covering holding sebific duct (5) around the second intake chute (12) and part has the swollen capsule of flexible second liquid (13), the left end sealing of the swollen capsule of the second liquid (13) is fixed on the outside surface being positioned at the second intake chute (12) left side of pedestal (4), the right-hand member sealing of the swollen capsule of the second liquid (13) is fixed on the outside surface of appearance sebific duct (5), the second sealed expansion chamber is formed between the outside surface that the swollen capsule of the second liquid (13) and described the second intake chute (12) and part hold sebific duct (5), the outside surface of sealing of hole seat (2) is provided with shutoff ring (14), and shutoff ring (14) is positioned at the right side of the swollen capsule of the first liquid (9), first inlet opening (6) and the second inlet opening (10) are interconnected by connecting pipe (3), for injecting the interval (16) of tested boring (15) for glue (18) between sealing of hole seat (2) right-hand member and pedestal (4) left end, pedestal (4) is provided with leads glue through hole (17) connection interval (16) and holds both sebific ducts (5), hold sebific duct (5) right-hand member and be slidably socketed with one for extruding the piston rod (19) holding the glue (18) in sebific duct (5) and move to interval (16), some strain rosettes of measuring circuit are located at the second liquid swollen capsule (13) outside surface.
2. direct-sticking hole wall strain gauge according to claim 1, it is characterized in that, measuring circuit comprises circumference and is distributed on three group of four strain rosette on chip (20) of the second liquid swollen capsule (13) outside surface and is embedded in temperature compensation and zeroing strain rosette (22) of the same sensitivity coefficient in the tail chamber (21) of sealing of hole seat (2), each strain rosette is electrically connected with 15 core shielding lines (23) respectively, and 15 core shielding lines (23) are through being located at the first cable aperture (24) pull-out of sealing of hole seat (2) outside.
3. direct-sticking hole wall strain gauge according to claim 1, it is characterized in that, mounting rod (1) comprises the directional connected shrink (25) that be connected removable with the left part of sealing of hole seat (2), directional connected shrink (25) inside is provided with the second cable aperture (26) and sebific duct hole (27), directional connected shrink (25) inside is also provided with the solid pipe screw (28) of the through sebific duct hole (27) of laterally splitting, Gu be provided with the solid pipe screw (29) for fixing fluid injection sebific duct (23) in pipe screw (28), directional connected shrink (25) right-hand member is provided with guide slot (30), the left part of sealing of hole seat (2) is provided with the orienting pin (31) be slidably matched with guide slot (30).
4. direct-sticking hole wall strain gauge according to claim 1, it is characterized in that, first inlet opening (6) two ends are threaded two copper pipes respectively, be designated as left copper pipe (32) and right copper pipe, right copper pipe is described connecting pipe (3), the left part of described left copper pipe (32) and fluid injection sebific duct (44) grafting, the right part of described right copper pipe is threaded with the second inlet opening (10), the outside surface of sealing of hole seat (2) is sequentially provided with the first binding groove (33) being annular from left to right, first intake chute (8), second binding groove (34), shutoff annular groove (35).
5. direct-sticking hole wall strain gauge according to claim 1, it is characterized in that, the outside surface of pedestal (4) is provided with the 3rd binding groove (36) of annular, the outside surface that described part holds sebific duct (5) is provided with the 4th annular binding groove (37), and the 3rd binding groove (36), the second intake chute (12), the 4th binding groove (37) sequentially distribute from left to right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520448335.XU CN204679028U (en) | 2015-06-26 | 2015-06-26 | Direct-sticking hole wall strain gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520448335.XU CN204679028U (en) | 2015-06-26 | 2015-06-26 | Direct-sticking hole wall strain gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204679028U true CN204679028U (en) | 2015-09-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520448335.XU Withdrawn - After Issue CN204679028U (en) | 2015-06-26 | 2015-06-26 | Direct-sticking hole wall strain gauge |
Country Status (1)
| Country | Link |
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| CN (1) | CN204679028U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897044A (en) * | 2015-06-26 | 2015-09-09 | 华北理工大学 | Direct adhering type wall hole strain measuring device |
| WO2022088818A1 (en) * | 2020-10-28 | 2022-05-05 | 珠海格力电器股份有限公司 | Strain sensor and robot |
-
2015
- 2015-06-26 CN CN201520448335.XU patent/CN204679028U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897044A (en) * | 2015-06-26 | 2015-09-09 | 华北理工大学 | Direct adhering type wall hole strain measuring device |
| CN104897044B (en) * | 2015-06-26 | 2017-05-03 | 华北理工大学 | Direct adhering type wall hole strain measuring device |
| WO2022088818A1 (en) * | 2020-10-28 | 2022-05-05 | 珠海格力电器股份有限公司 | Strain sensor and robot |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150930 Effective date of abandoning: 20170503 |
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| AV01 | Patent right actively abandoned |