CN108287110A - The sample pull head and its installation auxiliary device of the lower rock tension test of confining pressure effect - Google Patents
The sample pull head and its installation auxiliary device of the lower rock tension test of confining pressure effect Download PDFInfo
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- CN108287110A CN108287110A CN201810112500.2A CN201810112500A CN108287110A CN 108287110 A CN108287110 A CN 108287110A CN 201810112500 A CN201810112500 A CN 201810112500A CN 108287110 A CN108287110 A CN 108287110A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0423—Chucks, fixtures, jaws, holders or anvils using screws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0429—Chucks, fixtures, jaws, holders or anvils using adhesive bond; Gluing
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses sample pull heads and its installation auxiliary device that a kind of confining pressure acts on lower rock tension test.Sample pull head includes ball-and-socket bonding head, spheric nut, spherical bolt and ball-and-socket cover board.Ball-and-socket bonding head, ball-and-socket cover board and spherical bolt form the ball structure that tangles and ensure central tension, and installation process does not generate torque to sample, to avoid sample torsion impaired.Pull head top can wind adhesive waterproof tape, prevent fluid from entering sample effect sample nature.Installation auxiliary device includes fixed wrench and hexagonal socket wrench, and the installation of the sample pull head of lower rock tension test is acted on dedicated for confining pressure, easy to operate.The problems such as present invention existing for the lower rock tensile test device of confining pressure effect for weak torque, eccentric adjusting ability, permeability is also easy to produce, discloses a kind of sample pull head, efficiently solves the problems, such as above-mentioned, and the accuracy of experiment is made to be improved.
Description
Technical field
The present invention relates to rock mechanics field, the sample pull head of the lower rock tension test of specifically a kind of confining pressure effect and its
Installation auxiliary device.
Background technology
In rock engineering, many rocks destroy under tensile stress state.In rock slope engineering,
Under certain condition, the radial stress of slope surface and the tangential stress in top of the slope face can switch to tensile stress, and the rock mass near the edge of slope is easy quilt
Drawing crack formation is bordering on parallel drawing crack face with slope surface, and side slope is made gradually to destroy.In underground engineering, country rock is in tunnel radial direction
Direction will produce tensile stress, and in tunnel tangential direction and move towards direction, and country rock is still subject to compression.The drawing of tunnel radial direction
Stress is an important factor for causing country rock rupture or even unstability.The research opposite side of stretching mechanical character of the rock under confining pressure effect
The stability analysis of slope engineering and underground engineering is of great significance.
It discloses one kind application No. is 201611055843.7 patent of invention and can be suitably used under arbitrary confining pressure rock and stretch
The device of experiment, the device under the pressure effect of three-axis tester, by device two components it is vertically movable, produce pair
The pulling force of sample.The patent solves the problems such as prior art practicability is weak, realizes and is arbitrarily enclosed on three-axis tester
Rock tension test under pressure effect, but during the experiment, there is following Railway Project：Sample is installed to rock by 1
During tensile test apparatus, tightens bolt and be also easy to produce torque, damage sample；2 eccentric adjusting abilities are weak, cannot be completely secured
Sample axial tension；3 under confining pressure effect, and fluid can penetrate into sample, influence sample nature, causes experimental result inaccurate.
In view of the above-mentioned problems, there is still a need for further change for a kind of pull head part of the lower rock tensile test device of confining pressure effect
Into.
Invention content
In view of the deficiencies of the prior art, the technical issues of present invention intends to solve is to provide a kind of lower rock drawing of confining pressure effect
Stretch the sample pull head and its installation auxiliary device of experiment.
The technical solution that the present invention solves the technical problem is to provide a kind of examination of the lower rock tension test of confining pressure effect
Sample pull head, it is characterised in that the sample pull head includes ball-and-socket bonding head, adhesive waterproof tape, hexagon socket head cap screw, spheric nut, spherical spiral shell
Bolt, ball-and-socket cover board and thermoplastic tube；
The ball-and-socket bonding head is made of two different cylinders of diameter；There are one half for small-diameter circular cylinder upper end center
Ball cavity；The ball-and-socket cover board is disk-shaped structure, and size is identical as the small-diameter circular cylinder of ball-and-socket bonding head, lower face
Center is provided with segment cavity, and upper surface center is provided with ball-and-socket cover plate through hole, and segment cavity is connected to ball-and-socket cover plate through hole；The ball
Shape bolt is connected and composed by screw rod and bulb；The screw rod outer surface has external screw thread, upper end center to have a polygonal hole；The ball
Shape nut is connected and composed by hexagonal (hexagon)nut and segment；Spheric nut center is penetrated through by spheric nut threaded hole；
The lower face of the large diameter cylinder of the ball-and-socket bonding head is bonded with rock sample；The screw rod of the spherical bolt
The segment cavity and ball-and-socket cover plate through hole of ball-and-socket cover board are sequentially passed through, bulb is located in the segment cavity of ball-and-socket cover board；The ball
The lower face of nest cover board is fixedly connected by hexagon socket head cap screw with the small-diameter circular cylinder upper surface of ball-and-socket bonding head, and then by ball
The bulb of shape bolt is fixed in the cavity of segment cavity and hemisphere cavum composition, is formed ball and is tangled structure；The adhesive waterproof tape is tight
It is close to be wrapped in the small-diameter circular cylinder outer rim of ball-and-socket cover board outer rim and ball-and-socket bonding head, until the major diameter with ball-and-socket bonding head
Cylinder is concordant；The thermoplastic tube package rock sample, ball-and-socket bonding head and ball-and-socket cover board；Screw rod penetrates rock tension test dress
In setting；Spheric nut is connected by the external screw thread of spheric nut threaded hole and screw rod.
A kind of installation auxiliary device of the sample pull head of the lower rock tension test of confining pressure effect, it is characterised in that the installation is auxiliary
It includes fixed wrench and hexagonal socket wrench to help device；
The fixed wrench is made of orthogonal fixed hand lever and square bar；The section of square bar and the shape of polygonal hole
It is identical；
The hexagonal socket wrench is made of rotation hand lever and sleeve；The lower face center of the sleeve is provided with hexagonal prisms sky
Chamber, upper surface center are provided with Hexagonal jacket through-hole；Hexagonal jacket through-hole is connected to hexagonal prisms cavity；The square bar of the fixed wrench
Sequentially pass through the Hexagonal jacket through-hole and hexagonal prisms cavity of sleeve.
A kind of installation steps of the sample pull head of the lower rock tension test of confining pressure effect, it is characterised in that specific steps are such as
Under：
Step 1, ball-and-socket bonding head large diameter cylinder lower face and rock sample high intensity gluing knot；
Step 2, spherical bolt screw rod pass through ball-and-socket cover plate central segment cavity and ball-and-socket cover plate through hole after, will be spherical
The bulb of bolt is positioned in the hemisphere cavum of ball-and-socket bonding head；
The lower face small-diameter circular cylinder upper surface that passes through hexagon socket head cap screw and ball-and-socket bonding head of step 3, ball-and-socket cover board
It is fixedly connected, and then the bulb of spherical bolt is fixed on segment cavity with the cavity of hemisphere cavum composition, form ball and tangle
Structure；
Step 4, spherical bolt and ball-and-socket bonding head and ball-and-socket cover board formation ball tangle after structure, and the screw rod of spherical bolt is worn
Enter in rock tensile test device, spheric nut is screwed on into spherical bolt, the more of spherical bolt are inserted into the square bar of fixed wrench
In the shape hole of side, then by the hexagonal (hexagon)nut of the sleeve insertion spheric nut of hexagonal socket wrench, hold the fixation hand of fixed wrench
Bar makes spherical bolt fix, and holds the rotation hand lever of hexagonal socket wrench, screws spheric nut；Sample pull head is completed to draw in rock
Stretch the installation on experimental rig.
Compared with prior art, advantageous effect of the present invention is：
1, ball-and-socket bonding head, ball-and-socket cover board and spherical bolt form ball and twist, in the upper and lower ends of rock tensile test device
An eccentricity regulation structure is respectively increased, ensures sample axial tension and sample central tension, improves experiment accuracy；
2, ball-and-socket bonding head, ball-and-socket cover board and spherical bolt form ball and twist, in the mistake that spheric nut is screwed on to spherical bolt
Cheng Zhong, spherical bolt can move freely in the cavity that ball-and-socket bonding head, ball-and-socket cover board are formed, and effectively prevent existing experiment peace
Fill destruction of the torque generated in the process to rock；
3, adhesive waterproof tape is wound around in the small-diameter circular cylinder of ball-and-socket bonding head and ball-and-socket cover board composition, using anti-
The good leakproofness of glue band effectively prevent high-voltage oil liquid to penetrate into rock sample from pull head both ends；
4, the installation auxiliary device being made of back-up wrench and hexagonal socket wrench, after quickly and easily can installing improvement
Sample pull head, to improve conventional efficient.
5, the sample pull head and installation auxiliary device solve to be also easy to produce torque, eccentric adjusting present in existing experimentation
The problems such as ability is weak, permeability, to improve the accuracy of experiment.
Description of the drawings
Fig. 1 is the sample pull head and its a kind of embodiment of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
Rock tensile test device overall structure diagram；
Fig. 2 is the sample pull head and its a kind of embodiment of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
Sample pull head overall structure diagram；
Fig. 3 is the sample pull head and its a kind of embodiment of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
Ball-and-socket bonding head axonometric schematic diagram；
Fig. 4 is the sample pull head and its a kind of embodiment of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
Ball-and-socket bonding head schematic top plan view；
Fig. 5 is the sample pull head and its a kind of embodiment of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
Ball-and-socket bonding head diagrammatic cross-section；
Fig. 6 is the sample pull head and its a kind of embodiment of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
Spheric nut axonometric schematic diagram；
Fig. 7 is the sample pull head and its a kind of embodiment of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
Spheric nut schematic top plan view；
Fig. 8 is the sample pull head and its a kind of embodiment of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
Spheric nut diagrammatic cross-section；
Fig. 9 is the sample pull head and its a kind of embodiment of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
Spherical bolt axonometric schematic diagram；
Figure 10 is sample pull head and its a kind of implementation of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
The ball-and-socket cover board axonometric schematic diagram of example；
Figure 11 is sample pull head and its a kind of implementation of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
The ball-and-socket cover board schematic top plan view of example；
Figure 12 is sample pull head and its a kind of implementation of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
The ball-and-socket cover board diagrammatic cross-section of example；
Figure 13 is sample pull head and its a kind of implementation of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
The installation auxiliary device overall structure diagram of example；
Figure 14 is sample pull head and its a kind of implementation of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
The back-up wrench axonometric schematic diagram of example；
Figure 15 is sample pull head and its a kind of implementation of installation auxiliary device of the lower rock tension test of confining pressure of the present invention effect
The hexagonal socket wrench axonometric schematic diagram of example；(in figure：1, rock tensile test device；2, rock sample；3, ball-and-socket bonding head；
301, hemisphere cavum；302, ball-and-socket bonding head threaded hole；4, adhesive waterproof tape；5, hexagon socket head cap screw；6, spheric nut；601, hexagonal
Nut；602, spheric nut threaded hole；603, segment；7, spherical bolt；701, polygonal hole；702, screw rod；703, bulb；8、
Ball-and-socket cover board；801, segment cavity；802, ball-and-socket cover board threaded hole；803, ball-and-socket cover plate through hole；9, thermoplastic tube；10, fixation is pulled
Hand；1001, fixed hand lever；1002, square bar；11, hexagonal socket wrench；1101, hand lever is rotated；1102, sleeve；1103, hexagonal
Sleeve through hole；1104, hexagonal prisms cavity；12, testing machine loading head)
Specific implementation mode
Specific embodiments of the present invention are given below.Specific embodiment is only used for that present invention be described in more detail, unlimited
The application scope of the claims processed.
The present invention provides sample pull head (the abbreviation sample pull heads, referring to figure that a kind of confining pressure acts on lower rock tension test
2-12), it is characterised in that the sample pull head includes ball-and-socket bonding head 3, adhesive waterproof tape 4, hexagon socket head cap screw 5, spheric nut 6, ball
Shape bolt 7, ball-and-socket cover board 8 and thermoplastic tube 9；
The ball-and-socket bonding head 3 constitutes an entirety by two different cylinders of diameter；In small-diameter circular cylinder upper end
There are one hemisphere cavums 301 for the heart, and 301 periphery of hemisphere cavum is evenly distributed with ball-and-socket bonding head threaded hole 302；The ball-and-socket cover board 8 is circle
Platy structure, size is identical as the small-diameter circular cylinder of ball-and-socket bonding head 3, and lower face center is provided with segment cavity 801, on
End face center is provided with ball-and-socket cover plate through hole 803, and segment cavity 801 is connected to ball-and-socket cover plate through hole 803；The ball-and-socket cover board 8 four
Zhou Junbu ball-and-socket cover boards threaded hole 802；The spherical bolt 7 is connected and composed by screw rod 702 and bulb 703；Outside the screw rod 702
Surface has external screw thread, upper end center to have a polygonal hole 701 (the present embodiment is four corner apertures)；The spheric nut 6 is by hexagonal spiral shell
Cap 601 and segment 603 connect and compose；Spheric nut threaded hole 602 is provided among spheric nut 6；
The lower face of the large diameter cylinder of the ball-and-socket bonding head 3 and the high intensity gluing knot of rock sample 2；The ball
The screw rod 702 of shape bolt 7 sequentially passes through the segment cavity 801 and ball-and-socket cover plate through hole 803 of ball-and-socket cover board 8, and bulb 703 is located at ball
In the segment cavity 801 of nest cover board 8；The lower face of the ball-and-socket cover board 8 is small by hexagon socket head cap screw 5 and ball-and-socket bonding head 3
Diameter cylinders upper surface is fixedly connected, and then the bulb of spherical bolt 7 703 is fixed on segment cavity 801 and hemisphere cavum
In the cavitys of 301 compositions, forms ball and tangle structure；The adhesive waterproof tape 4 winds around 8 outer rim of ball-and-socket cover board and ball-and-socket bonding head
In 3 small-diameter circular cylinder outer rim, until concordant with the large diameter cylinder of ball-and-socket bonding head 3, playing prevents high-voltage oil liquid from soaking
Enter the effect of sample；The thermoplastic tube 9 wraps up rock sample 2, ball-and-socket bonding head 3 and ball-and-socket cover board 8, plays isolation fluid and makes
The effect of 2 surrounding uniform-compression of rock sample；Screw rod 702 penetrates in rock tensile test device 1；Spheric nut 6 passes through spherical shape
Nut threaded hole 602 is connect with the external screw thread of screw rod 702, and then fixed spherical bolt 7.
Invention also provides the installation auxiliary device (letters that a kind of confining pressure acts on the sample pull head of lower rock tension test
Claim installation auxiliary device, referring to Figure 13-15), it is characterised in that the installation auxiliary device includes fixed wrench 10 and Hexagonal jacket
Spanner 11；
The fixed wrench 10 is made of orthogonal fixed hand lever 1001 and square bar 1002；The section of square bar 1002 with
The shape of polygonal hole 701 is identical (being square in the present embodiment)；
The hexagonal socket wrench 11 is made of rotation hand lever 1101 and sleeve 1102；In the lower face of the sleeve 1102
The heart is provided with hexagonal prisms cavity 1104, and upper surface center is provided with Hexagonal jacket through-hole 1103；Hexagonal jacket through-hole 1103 and hexagonal prisms
Cavity 1104 is connected to；The square bar 1002 of the fixed wrench 10 sequentially passes through the Hexagonal jacket through-hole 1103 and six ribs of sleeve 1102
Column cavity 1104；The hexagonal socket wrench 11 can be rotated freely around the square bar 1002 of fixed wrench 10.
The present invention also provides the installation steps that a kind of confining pressure acts on the sample pull head of lower rock tension test, feature exists
In being as follows：
Step 1, ball-and-socket bonding head 3 large diameter cylinder lower face and the high intensity gluing knot of rock sample 2；
Step 2, spherical bolt 7 screw rod 702 pass through 8 center of ball-and-socket cover board segment cavity 801 and ball-and-socket cover plate through hole
After 803, the bulb 703 of spherical bolt 7 is positioned in the hemisphere cavum 301 of ball-and-socket bonding head 3；
The lower face small-diameter circular cylinder upper end that passes through hexagon socket head cap screw 5 and ball-and-socket bonding head 3 of step 3, ball-and-socket cover board 8
Face is fixedly connected, and then the bulb of spherical bolt 7 703 is fixed on the cavity that segment cavity 801 is formed with hemisphere cavum 301
In, it forms ball and tangles structure；
Step 4, spherical bolt 7 and ball-and-socket bonding head 3 and the formation ball of ball-and-socket cover board 8 tangle after structure, by the spiral shell of spherical bolt 7
Bar 702 penetrates in rock tensile test device 1, and spheric nut 6 is screwed on spherical bolt 7, with the square bar 1002 of fixed wrench 10
It is inserted into the polygonal hole 701 of spherical bolt 7, then the sleeve 1102 of hexagonal socket wrench 11 is inserted into the hexagonal of spheric nut 6
In nut 601, holding the fixation hand lever 1001 of fixed wrench 10 makes spherical bolt 7 fix, and holds the rotation of hexagonal socket wrench 11
Bar 1101 is changed hands, spheric nut 6 is screwed；
Step 5 winds around adhesive waterproof tape 4 in the small-diameter circular cylinder of ball-and-socket bonding head 3, until and large-diameter circular
Cylinder is concordant；Sample 2, ball-and-socket bonding head 3 and ball-and-socket cover board 8 are wrapped up with thermoplastic tube 9；It completes sample pull head and stretches examination in rock
Installation on experiment device 1.
The present invention does not address place and is suitable for the prior art.
Claims (4)
1. a kind of sample pull head of the lower rock tension test of confining pressure effect, it is characterised in that the sample pull head includes that ball-and-socket bonds
Head, adhesive waterproof tape, hexagon socket head cap screw, spheric nut, spherical bolt, ball-and-socket cover board and thermoplastic tube；
The ball-and-socket bonding head is made of two different cylinders of diameter；There are one hemisphere skies for small-diameter circular cylinder upper end center
Chamber；The ball-and-socket cover board is disk-shaped structure, and size is identical as the small-diameter circular cylinder of ball-and-socket bonding head, lower face center
It is provided with segment cavity, upper surface center is provided with ball-and-socket cover plate through hole, and segment cavity is connected to ball-and-socket cover plate through hole；The spherical shape spiral shell
Bolt is connected and composed by screw rod and bulb；The screw rod outer surface has external screw thread, upper end center to have a polygonal hole；The spherical shape spiral shell
Cap is connected and composed by hexagonal (hexagon)nut and segment；Spheric nut center is penetrated through by spheric nut threaded hole；
The lower face of the large diameter cylinder of the ball-and-socket bonding head is bonded with rock sample；The screw rod of the spherical bolt is successively
Across the segment cavity and ball-and-socket cover plate through hole of ball-and-socket cover board, bulb is located in the segment cavity of ball-and-socket cover board；The ball-and-socket lid
The lower face of plate is fixedly connected by hexagon socket head cap screw with the small-diameter circular cylinder upper surface of ball-and-socket bonding head, and then by spherical spiral shell
The bulb of bolt is fixed in the cavity of segment cavity and hemisphere cavum composition, is formed ball and is tangled structure；The adhesive waterproof tape closely twines
It is wound in ball-and-socket cover board outer rim and the small-diameter circular cylinder outer rim of ball-and-socket bonding head, until the cylinder with large diameter with ball-and-socket bonding head
Body is concordant；The thermoplastic tube package rock sample, ball-and-socket bonding head and ball-and-socket cover board；Screw rod penetrates rock tensile test device
In；Spheric nut is connected by the external screw thread of spheric nut threaded hole and screw rod.
2. a kind of installation auxiliary device of the sample pull head of the lower rock tension test of confining pressure effect described in claim 1, special
Sign is that the installation auxiliary device includes fixed wrench and hexagonal socket wrench；
The fixed wrench is made of orthogonal fixed hand lever and square bar；The shape phase in the section of square bar and polygonal hole
Together；
The hexagonal socket wrench is made of rotation hand lever and sleeve；The lower face center of the sleeve is provided with hexagonal prisms cavity,
Upper surface center is provided with Hexagonal jacket through-hole；Hexagonal jacket through-hole is connected to hexagonal prisms cavity；The square bar of the fixed wrench according to
Secondary Hexagonal jacket through-hole and hexagonal prisms cavity across sleeve.
3. a kind of installation steps of the sample pull head of the lower rock tension test of confining pressure effect described in claim 1, feature exist
In being as follows：
Step 1, ball-and-socket bonding head large diameter cylinder lower face and rock sample high intensity gluing knot；
Step 2, spherical bolt screw rod pass through ball-and-socket cover plate central segment cavity and ball-and-socket cover plate through hole after, by spherical bolt
Bulb be positioned in the hemisphere cavum of ball-and-socket bonding head；
Step 3, ball-and-socket cover board lower face fixed by the small-diameter circular cylinder upper surface of hexagon socket head cap screw and ball-and-socket bonding head
Connection, and then the bulb of spherical bolt is fixed in the cavity of segment cavity and hemisphere cavum composition forms ball and tangles structure；
Step 4, spherical bolt and ball-and-socket bonding head and ball-and-socket cover board formation ball tangle after structure, and the screw rod of spherical bolt is penetrated rock
In stone tensile test apparatus, spheric nut is screwed on into spherical bolt, the polygon of spherical bolt is inserted into the square bar of fixed wrench
Kong Zhong, then the sleeve of hexagonal socket wrench is inserted into the hexagonal (hexagon)nut of spheric nut, holding the fixation hand lever of fixed wrench makes
Spherical bolt is fixed, and is held the rotation hand lever of hexagonal socket wrench, is screwed spheric nut；It completes sample pull head and stretches examination in rock
Installation on experiment device.
4. the installation steps of the sample pull head of the lower rock tension test of confining pressure effect according to claim 3, feature exist
In further including step 5；Step 5 winds around adhesive waterproof tape in the small-diameter circular cylinder of ball-and-socket bonding head, until with big straight
Diameter cylinder is concordant；With thermoplastic tube package sample, ball-and-socket bonding head and ball-and-socket cover board；It completes sample pull head and stretches examination in rock
Installation on experiment device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810112500.2A CN108287110A (en) | 2018-02-05 | 2018-02-05 | The sample pull head and its installation auxiliary device of the lower rock tension test of confining pressure effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810112500.2A CN108287110A (en) | 2018-02-05 | 2018-02-05 | The sample pull head and its installation auxiliary device of the lower rock tension test of confining pressure effect |
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| Publication Number | Publication Date |
|---|---|
| CN108287110A true CN108287110A (en) | 2018-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810112500.2A Pending CN108287110A (en) | 2018-02-05 | 2018-02-05 | The sample pull head and its installation auxiliary device of the lower rock tension test of confining pressure effect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220291105A1 (en) * | 2019-09-06 | 2022-09-15 | Shandong University | Tbm-mounted surrounding rock wear resistance testing system and method |
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