CN201408095Y - Spring resistance type anchor stem dynamometer - Google Patents
Spring resistance type anchor stem dynamometer Download PDFInfo
- Publication number
- CN201408095Y CN201408095Y CN2009200354087U CN200920035408U CN201408095Y CN 201408095 Y CN201408095 Y CN 201408095Y CN 2009200354087 U CN2009200354087 U CN 2009200354087U CN 200920035408 U CN200920035408 U CN 200920035408U CN 201408095 Y CN201408095 Y CN 201408095Y
- Authority
- CN
- China
- Prior art keywords
- spring
- cylindrical shell
- resistance
- resistance wire
- fixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model relates to a spring resistance type anchor stem dynamometer and belongs to the field of measuring instrument technology. The dynamometer comprises a hollow cylindrical shell. The middle part of the cylindrical shell is provided with a spring extending along the length direction of the cylindrical shell. The spring is relatively fixed with the lower end of the cylindrical shell. Aresistance wire extending along the length direction of the cylindrical shell is fixed between the cylindrical shell and the spring. The resistance wire is sleeved with a metal sheet electrically connected with the resistance wire. The metal sheet is fixedly connected with the upper end of the spring. When the measurement is processed, a lower tray is fixed arranged on the rock mass and the like,a connecting wire is led out from the lower end of the resistance wire and the metal sheet to an external data acquisition system, and when an anchor stem (cable) on the lower part of the spring bears the stress, the spring position can result in corresponding change of the output resistance signal so as to measure the change of the internal force of the anchor stem (cable) and achieve the aim ofsecurity detection.
Description
Technical field
The utility model relates to a kind of dynamometer, and especially a kind of spring resistance-type anchor rod force-measuring instrument belongs to the measuring appliance technical field.
Background technology
At present, for civil engineering structures such as side slope, cavern, tunnel and coal mine roadway in the engineering, often adopt anchor pole (rope) to come supporting.Anchor pole (rope) supporting is as a kind of very effective reinforcement means, and the quality of anchor pole (rope) supporting directly has influence on the security of coal mine roadway, stressed size of anchor pole (rope) and distribution have truly reflected the working condition of anchor pole, can judge anchor pole (rope) carrying degree thus, whether test is surrendered, and then decision structure safety whether, whether supporting parameter is reasonable.At present, measure the stressed instrument of anchor pole (rope) and mainly contain force-measuring anchor stock and anchor pole (rope) dynamometer.
Anchor ergometer is used to detect anchor pole in working order down to the support load of crag, is installed between anchor pole pallet and the crag, is mainly used in the stressed monitoring of end anchorage anchor pole and anchor cable.Anchor rod force-measuring is in respect of various ways such as resistance-strain type, steel chord type, flat jack formulas at present.Force-measuring anchor stock is a kind of measurement anchor pole with special construction, be installed in the tunnel as common bolt, but the stressed of each section can measure at any time on its body of rod.Force-measuring anchor stock is made according to the resistance-strain principle, mainly partly is made up of the body of rod, protection joint and YJK4500 type hyperchannel static resistance strainmeter etc.After force-measuring anchor stock was stressed, each measuring point strain changed on the body of rod, and the size of dependent variable is directly proportional with the stress of this measuring point, measures strain increment by the static resistance strainmeter, and strain increment multiply by the stress value that calibration coefficient is this point measurement.The corresponding addition of the stress value of every pair of foil gauge is averaged, and can draw the mean stress of each point position, multiply by body of rod transversal section again, is the suffered axle power of this body of rod.
But existing anchor pole monitoring instrument cost is relatively more expensive, installs and uses comparatively meticulous.And for this site operation complexity of coal mine roadway, condition of work are abominable, the length of service only requires 1-2 the stressed monitoring of support anchor rod, the use amount of anchor pole is very big, need each measuring point is carried out stressed monitoring, whether judge that anchor pole is stressed lost efficacy, and then need repair again, so aspect such as the cost of present existing anchor pole monitoring instrument, construction environment and the convenience installed and used and actual needs all have big gap.
The utility model content
The purpose of this utility model is: provide a kind of can engineering demands, and simple in structure, easy construction, spring resistance-type anchor rod force-measuring instrument with low cost, thus be suitable for wide popularization and application in coal mine roadway.
In order to reach above purpose, spring resistance-type anchor rod force-measuring instrument of the present utility model contains the cylindrical shell of hollow, the middle part of described cylindrical shell is mounted with the spring that extends along the cylindrical shell length direction, the lower end relative fixed of described spring and cylindrical shell, be fixed with the resistance wire that extends along the cylindrical shell length direction between described cylindrical shell and the spring, be with the sheet metal that is electrically connected with it on the described resistance wire, the upper end of described sheet metal and spring is connected.
The purpose of this utility model is further realized by following technical scheme: the lower end of described cylindrical shell is fixed on down on the pallet by picking up the ears.
During measurement, to play pallet to be placed in rock mass etc. locates to fix, from the lower end of resistance wire and sheet metal draw connection lead towards the external data acquisition system, when the anchor pole (rope) on spring top when meeting with stresses, spring position causes the resistance signal generation respective change exported, change thereby can record anchor pole (rope) internal force, reach the purpose of safety detection.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the structural representation of an embodiment of the utility model.
Embodiment
Embodiment one
The spring resistance-type anchor rod force-measuring instrument of present embodiment mainly is made up of the interior force measuring system that is connected with the communication of external data acquisition system as shown in Figure 1.Should in force measuring system comprise 1, spring; 2, resistance wire; 3, conductive metal sheet; 4, first connects lead; 5, second connects lead; 6, cylindrical shell; 7, first binding post; 8, the second binding posts; 9, pick up the ears; 10, following pallet; L1, top tray.
The middle part of cylindrical shell 6 is mounted with the spring 1 that extends along the cylindrical shell length direction, the lower end relative fixed of spring 1 lower end and cylindrical shell, and the lower end of cylindrical shell 69 is fixed on down on the pallet 10 by picking up the ears.Be fixed with the resistance wire 2 that extends along the cylindrical shell length direction between cylindrical shell 6 and the spring 1, the upper and lower end of this resistance wire is fixed on the cylinder lateral wall by first binding post 7 and second binding post 8 respectively.The lower end of resistance wire 2 is connected lead 5 and is electrically connected with second.Be with the sheet metal 3 that is electrically connected with it on this resistance wire, promptly sheet metal 3 one ends are fixedlyed connected with spring 1 top, and the other end is provided with circular hole, and resistance wire 2 passes the circular hole of sheet metal 3 ends.One end of this sheet metal is connected lead 4 and is electrically connected with the upper end of spring 1 and first.
During use, the perforation that the first connection lead 4 passes cylindrical shell 6 upper ends is connected with the external data harvester, and the following circular hole that the second connection lead 5 passes cylindrical shell 6 bottoms is connected with the external data harvester; Cylindrical shell 69 is fixedly connected on the lower plate dish 10 by picking up the ears.Anchor pole (rope) is supported on the spring 1 by top tray 11.Like this, the internal force of anchor pole (rope) is measured can be converted into the measurement to resistance wire resistance by resistance wire, conductor metal sheet, just can determine the internal force of anchor pole (rope) by measuring resistance silk resistance.
The loss of anchor pole (rope) internal force makes anchor pole (rope) lax, the corresponding mobile Δ X of spring, and this moment, the loss of anchor pole (rope) internal force was F=k Δ X, wherein k is the stiffness constant of spring.The displacement that spring moves just equals the displacement that conductive metal sheet moves on resistance wire.According to R=ρ l/s, wherein ρ is the resistivity of resistance wire, and l is the length of resistance wire, and s is the resistance wire cross-sectional area.For prismatic resistance wire, as long as by traverse measurements resistance wire changes in resistance value Δ R, just can instead push away the variation of spring displacement, change thereby obtain anchor pole (rope) internal force, reach the purpose of safety detection.
Facts have proved, this spring resistance-type anchor ergometer adopts in construction sites such as coal mine roadway has following advantage: 1) cheap: the bolt supporting utilization rate of coal mine roadway is very high, each supporting point is monitored, and instrument cost has determined its applicability; 2) it is convenient to install, measure: the construction environment of coal mine roadway is arduous unusually, and the tunnel is dark moist, be unfavorable for that the workmen operates, and the utilization of present embodiment is convenient unusually; 3) can engineering demands: the bolt supporting of coal mine roadway, the frequency of utilization height, and not high to the measuring accuracy of each measuring point, only need to differentiate its stressed whether inefficacy get final product, this patent can satisfy specific engine request, the differentiation disabled status; 4) safe: the stressed monitoring of the anchor pole that proposes in the present embodiment, by simple spring assembly, stressed variation is converted into the variation of resistance value, thereby measures, thereby simple in structure, safe in utilization in the abominable coal mine roadway of environment.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (4)
1. spring resistance-type anchor rod force-measuring instrument, the cylindrical shell that contains hollow, it is characterized in that: the middle part of described cylindrical shell is mounted with the spring that extends along the cylindrical shell length direction, the lower end relative fixed of described spring and cylindrical shell, be fixed with the resistance wire that extends along the cylindrical shell length direction between described cylindrical shell and the spring, be with the sheet metal that is electrically connected with it on the described resistance wire, the upper end of described sheet metal and spring is connected.
2. spring resistance-type anchor rod force-measuring instrument according to claim 1 is characterized in that: described sheet metal one end is fixedlyed connected with the spring top, and the other end is provided with circular hole, and described resistance wire passes the circular hole of sheet metal end.
3. spring resistance-type anchor rod force-measuring instrument according to claim 2, it is characterized in that: the upper and lower end of described resistance wire is fixed on the cylinder lateral wall by first binding post and second binding post respectively.
4. spring resistance-type anchor rod force-measuring instrument according to claim 3, it is characterized in that: the lower end of described cylindrical shell is fixed on down on the pallet by picking up the ears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200354087U CN201408095Y (en) | 2009-03-17 | 2009-03-17 | Spring resistance type anchor stem dynamometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200354087U CN201408095Y (en) | 2009-03-17 | 2009-03-17 | Spring resistance type anchor stem dynamometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201408095Y true CN201408095Y (en) | 2010-02-17 |
Family
ID=41679032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200354087U Expired - Fee Related CN201408095Y (en) | 2009-03-17 | 2009-03-17 | Spring resistance type anchor stem dynamometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201408095Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884458A (en) * | 2014-03-27 | 2014-06-25 | 东南大学 | Slender rod bi-directional internal force measuring sensor and calibration method |
| CN104296896A (en) * | 2014-11-04 | 2015-01-21 | 山东科技大学 | Direct reading type rock bolt dynamometer used for simulation test and working method thereof |
| CN110454531A (en) * | 2019-07-11 | 2019-11-15 | 江苏长龄液压股份有限公司 | A kind of center is equipped with the spring of detection medium |
-
2009
- 2009-03-17 CN CN2009200354087U patent/CN201408095Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884458A (en) * | 2014-03-27 | 2014-06-25 | 东南大学 | Slender rod bi-directional internal force measuring sensor and calibration method |
| CN103884458B (en) * | 2014-03-27 | 2016-01-20 | 东南大学 | A kind of two-way interior force measuring sensors of thin bar and scaling method |
| CN104296896A (en) * | 2014-11-04 | 2015-01-21 | 山东科技大学 | Direct reading type rock bolt dynamometer used for simulation test and working method thereof |
| CN110454531A (en) * | 2019-07-11 | 2019-11-15 | 江苏长龄液压股份有限公司 | A kind of center is equipped with the spring of detection medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103485811B (en) | The detection method of anchor axial force and moment of flexure and detection anchor pole thereof | |
| CN203337111U (en) | Hoop type optical fiber grating reinforcement meter | |
| CN203772258U (en) | Tower barrel comprehensive monitoring device for wind turbine generator | |
| CN203432538U (en) | Fiber grating crack sensor | |
| CN103278384B (en) | Testing device and measuring method for anchorage performance of coal and rock mass in coal mine tunnel | |
| CN201408095Y (en) | Spring resistance type anchor stem dynamometer | |
| CN107328513A (en) | A kind of online pulling force detector of high voltage cable | |
| CN203349779U (en) | Strain-type displacement sensor and elevator brake having same | |
| CN206248252U (en) | A kind of anchor pole axial direction dynamometer | |
| CN101793503B (en) | Fiber Bragg rating measurement method for deformation of duckbill-type cross arm primary sheets | |
| CN201795774U (en) | Adhesion type resistance strain-gage transducer | |
| CN205384108U (en) | Measure axial tension's resistance strain force sensor | |
| CN202693170U (en) | Fiber Bragg grating pre-stressed force-measuring rock bolt | |
| CN202793660U (en) | Optical fiber sensor-based pulling force monitoring system for overhead power transmission line | |
| CN105486218A (en) | Smart material strain gauge for monitoring strain of asphalt pavement and application | |
| CN202788894U (en) | Prestressing force measuring anchor stock | |
| CN204575459U (en) | A kind of flexural member Mechanics Performance Testing device | |
| KR20110035499A (en) | The load cell which a load bearing equipment measurement sensitivity is superior | |
| CN106400682A (en) | Force-measurement type laminated rubber bearing based on optical fiber deformation sensor | |
| CN203420292U (en) | Direct-reading type pile foundation displacement detection device | |
| CN214748590U (en) | Cable gravity sensor | |
| CN105157591A (en) | High-sensitivity high-resolution high-precision fiber Bragg grating array strain sensor | |
| CN205772606U (en) | A kind of elevator weighing apparatus | |
| CN201828319U (en) | Weighing sensor | |
| CN201653606U (en) | Strain force-measuring steel plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100217 Termination date: 20110317 |