CN217211946U - Rock tensile strength testing arrangement - Google Patents
Rock tensile strength testing arrangement Download PDFInfo
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- CN217211946U CN217211946U CN202220681394.1U CN202220681394U CN217211946U CN 217211946 U CN217211946 U CN 217211946U CN 202220681394 U CN202220681394 U CN 202220681394U CN 217211946 U CN217211946 U CN 217211946U
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Abstract
The utility model belongs to the technical field of the rock performance test device to a rock tensile strength testing arrangement is specifically disclosed. The device comprises a bracket and a clamp; the clamp comprises a left clamp and a right clamp which are arranged at intervals, a left accommodating cavity and a right accommodating cavity are respectively formed in the ends, close to each other, of the left clamp and the right clamp, and necking is formed at the front ends of the left accommodating cavity and the right accommodating cavity; during testing, the protruding parts at the two ends of the rock test piece are respectively accommodated in the left accommodating cavity and the right accommodating cavity, and the left clamp and the right clamp slide towards the directions away from each other to apply pulling force to the rock test piece until the rock test piece is broken by pulling; the protruding parts at the two ends of the rock test piece are limited by the necking so as to prevent the rock test piece from slipping from the clamp during the test; meanwhile, the clamp mainly applies axial force to the rock test piece, so that radial force is small, stress concentration is avoided, the rock test piece is prevented from being damaged due to the action of radial clamping force, and the accuracy of the tensile strength test result of the rock test piece is improved.
Description
Technical Field
The utility model belongs to rock performance test device field, more specifically relates to a rock tensile strength testing arrangement.
Background
The tensile strength of the rock is an index of mechanical properties of the rock, and in engineering practice, in order to obtain parameters of the mechanical properties of the rock, the tensile strength of the rock is often required to be tested.
At present, the tensile strength test of the rock has two methods, one is a direct drawing test, and the other is a splitting tensile strength test. The former test method can directly obtain the tensile strength of the rock, but in the test process, the tensile test piece of the rock is usually a cylinder, and when the test machine clamps the rock test piece, the clamp force is too large, so that the rock core is easily damaged, and the test result is influenced; the clamp force is too small, so that the test piece is easy to slip, and the test result and the test efficiency are further influenced. The latter splitting tensile test is to obtain the tensile strength of the rock by an indirect method, and stress concentration is easily generated in the test process, so that errors are generated in the test result.
Based on above-mentioned defect and not enough, the inventor is to directly drawing the experimental mode, makes further improvement design to current rock tensile strength testing arrangement to solve current rock tensile strength testing arrangement and cause the problem of test piece slippage easily when experimental.
SUMMERY OF THE UTILITY MODEL
To the above defect of prior art or improve the demand, the utility model provides a rock tensile strength testing arrangement designs through the shape to anchor clamps to the problem of slippage in the test piece follow anchor clamps when solving rock tensile strength test, therefore the application scenario that is particularly useful for rock tensile strength test.
In order to achieve the purpose, the utility model provides a rock tensile strength testing device, which comprises a bracket and a clamp;
the support comprises a left vertical frame, a right vertical frame and a cross beam connected between the left vertical frame and the right vertical frame;
the anchor clamps include with equal sliding connection's of crossbeam left anchor clamps and right anchor clamps, left side anchor clamps and right anchor clamps interval set up, and left holding chamber and right holding chamber are formed respectively to the inside one end that is close to each other of left anchor clamps and right anchor clamps, left side holding chamber and right holding chamber front end form the throat respectively, just the throat in left side holding chamber and right holding chamber sets up relatively.
During testing, the rock test piece is made to be dumbbell-like in shape with two large ends and a small middle part, the protruding parts at the two ends of the rock test piece are respectively contained in the left containing cavity and the right containing cavity, the protruding parts at the two ends of the rock test piece are respectively limited in the left containing cavity and the right containing cavity by the necking, and the left clamp and the right clamp respectively slide along the cross beam in the direction away from each other to apply pulling force to the rock test piece until the rock test piece is broken by pulling.
Through above design, this kind of rock tensile strength testing arrangement passes through the bellying restriction of throat with the rock test piece in left holding chamber and right holding intracavity, on the one hand, in order to realize preventing the rock test piece slippage from anchor clamps when experimental, on the other hand, the axial force is mainly applyed to the rock test piece to anchor clamps, and radial clamping force is less, in order to avoid stress concentration, and avoid the rock test piece to destroy because of radial clamping force acts on, improve the accuracy of rock test piece tensile strength test result.
Preferably, the cross beam comprises an upper cross beam and a lower cross beam, and the left clamp and the right clamp are respectively connected with the upper cross beam and the lower cross beam in a sliding manner, so that the left clamp and the right clamp are connected with the cross beam in a sliding manner, and the left clamp and the right clamp are more stable when sliding.
As a further preferred option, the left clamp includes an upper left clamping member and a lower left clamping member, the right clamp includes an upper right clamping member and a lower right clamping member, the surfaces of the upper left clamping member and the lower left clamping member that are close to each other and the surfaces of the upper right clamping member and the lower right clamping member that are close to each other are provided with grooves, and the left accommodating cavity is formed by butting the grooves respectively provided on the upper left clamping member and the lower left clamping member; the right accommodating cavity is formed by butting grooves respectively formed in the upper right clamping piece and the lower right clamping piece; the left upper clamping piece and the right upper clamping piece are both connected with the upper cross beam in a sliding manner, and the left lower clamping piece and the right lower clamping piece are both connected with the lower cross beam in a sliding manner, so that the left clamp and the right clamp are respectively connected with the upper cross beam and the lower cross beam in a sliding manner; through two parts about equally split left anchor clamps and right anchor clamps is for put into left anchor clamps and right anchor clamps with the rock test piece, make the bellying at rock test piece both ends hold respectively in the holding intracavity of left anchor clamps and right anchor clamps.
Preferably, the upper left clamping piece, the upper right clamping piece, the lower left clamping piece and the lower right clamping piece are respectively connected with the upper cross beam or the lower cross beam in a sliding manner through sliding frames sleeved on the upper cross beam or the lower cross beam; two sliding frames are respectively sleeved on the upper cross beam and the lower cross beam, the two sliding frames of the upper cross beam are respectively fixedly connected with the upper left clamping piece and the upper right clamping piece, and the two sliding frames of the lower cross beam are respectively fixedly connected with the lower left clamping piece and the lower right clamping piece.
Preferably, the left vertical frame comprises a left upper vertical frame and a left lower vertical frame which are connected in a lifting manner; the right vertical frame comprises a right upper vertical frame and a right lower vertical frame which are connected in a lifting way; the upper cross beam is connected between the left upper vertical frame and the right upper vertical frame, and the lower cross beam is connected between the left lower vertical frame and the right lower vertical frame.
Preferably, vertical jacks are respectively connected between the left upper vertical frame and the left lower vertical frame and between the right upper vertical frame and the right lower vertical frame to realize lifting connection; during the experiment, the upper left vertical frame and the upper right vertical frame are jacked up through the vertical jack, the upper cross beam is driven to lift up, the upper left clamping piece and the upper right clamping piece are further driven to lift up to be separated from the lower left clamping piece and the lower right clamping piece respectively, the rock test piece is conveniently placed into the clamp, and the automation of the device is realized.
Preferably, the vertical jacks are respectively connected between the upper left vertical frame and the lower left vertical frame and between the upper right vertical frame and the lower right vertical frame, so that the upper left vertical frame and the upper right vertical frame are more stable when lifted.
Preferably, a horizontal jack is connected between the upper left clamping piece and the upper right clamping piece and between the lower left clamping piece and the lower right clamping piece respectively; the horizontal jack is jacked to enable the upper left clamping piece and the upper right clamping piece to be away from each other, and meanwhile, the lower left clamping piece and the lower right clamping piece are away from each other, so that the rock test piece is stretched, and automation of the device is realized.
As further preferred, left side holding chamber and right holding chamber are cylindrically, and the throat cross-section of left side holding chamber and right holding chamber front end is circularly, and the inner wall of left side holding chamber and right holding chamber is to corresponding throat department rounding off, and this kind of scheme is convenient for process to can be stress concentration is eliminated when experimental, improve experimental accuracy.
Generally, through the utility model above technical scheme who thinks compares with prior art, mainly possesses following technical advantage:
1. the bulge part of the rock test piece is limited in the left accommodating cavity and the right accommodating cavity through the necking, so that the rock test piece can be prevented from slipping from the clamp during testing; meanwhile, the clamp mainly applies axial force to the rock test piece, the radial clamping force is small, stress concentration is avoided, the rock test piece is prevented from being damaged due to the action of the radial clamping force, and the accuracy of the tensile strength test result of the rock test piece is improved.
2. As an improvement of the scheme, the upper cross beam and the lower cross beam are arranged, so that the left clamp and the right clamp are smoother when sliding; through with left anchor clamps and right anchor clamps split respectively into two upper and lower parts to set up left grudging post and right grudging post respectively into two upper and lower parts that liftable is connected, so that two upper and lower parts of left anchor clamps and right anchor clamps can be parted, be convenient for put into left anchor clamps and right anchor clamps with the rock test piece.
3. As another improvement of the scheme, the automation of the device is realized by arranging the vertical jack and the horizontal jack.
4. As a further improvement of the above scheme, the left accommodating cavity and the right accommodating cavity are designed to be cylindrical, and the inner walls of the left accommodating cavity and the right accommodating cavity are in smooth transition to the corresponding necking positions, so that the processing is convenient, the stress concentration can be eliminated during the test, and the test accuracy is improved.
Drawings
Fig. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a rock test piece according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion a of FIG. 1;
FIG. 4 is a cross-sectional view A-A of FIG. 1;
FIG. 5 is a sectional view taken along line B-B of FIG. 1;
FIG. 6 is a cross-sectional view C-C of FIG. 1;
fig. 7 is a cross-sectional view taken along line D-D of fig. 1.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
the device comprises a support 1, a clamp 2, a rock test piece 3, a left vertical frame 11, a right vertical frame 12, an upper cross beam 13, a lower cross beam 14, a vertical jack 15, a left clamp 21, a right clamp 22, a left accommodating cavity 23, a right accommodating cavity 24, a horizontal jack 25, a sliding frame 26, an upper left vertical frame 111, a lower left vertical frame 112, an upper right vertical frame 121, a lower right vertical frame 122, an upper left clamping piece 211, a lower left clamping piece 212, an upper right clamping piece 221 and a lower right clamping piece 222.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the device for testing tensile strength of rock provided by the embodiment of the present invention comprises a support 1 and a clamp 2;
the support 1 comprises a left vertical frame 11, a right vertical frame 12 and a cross beam connected between the left vertical frame 11 and the right vertical frame 12;
anchor clamps 2 include with the equal sliding connection's of crossbeam left anchor clamps 21 and right anchor clamps 22, left anchor clamps 21 and right anchor clamps 22 interval setting, left anchor clamps 21 and right anchor clamps 22 one end that is close to each other inside forms left holding chamber 23 and right holding chamber 24 respectively, and left holding chamber 23 and right holding chamber 24 front end form the throat respectively, and the relative setting of the throat of left holding chamber 23 and right holding chamber 24.
During testing, the rock test piece 3 is formed into a dumbbell-like shape with two large ends and a small middle part, the convex parts at the two ends of the rock test piece 3 are respectively accommodated in the left accommodating cavity 23 and the right accommodating cavity 24, and the convex parts at the two ends of the rock test piece 3 are respectively limited in the left accommodating cavity 23 and the right accommodating cavity 24 by the necking, so that the rock test piece 3 is prevented from slipping from the clamp 2 during testing; meanwhile, the left clamp 21 and the right clamp 22 respectively slide along the cross beam towards the directions away from each other to apply a pulling force to the rock test piece 3 until the rock test piece 3 is broken by pulling, the clamp 2 mainly applies an axial force to the rock test piece 3, the radial clamping force is small, stress concentration is avoided, the rock test piece 3 is prevented from being damaged due to the action of the radial clamping force, and the accuracy of the tensile strength test result of the rock test piece 3 is improved.
Each of these components will be described in more detail below.
In the present embodiment, as shown in fig. 2, the rock specimen 3 is dumbbell-shaped, and the protruding portions at both ends of the rock specimen 3 are cylindrical in the present embodiment, which facilitates processing; the surface of the rock test piece 3 is in smooth transition so as to eliminate stress concentration; in some embodiments, the protruding portions at the two ends of the rock specimen 3 may also be spherical, truncated cone, rectangular parallelepiped, truncated square, etc. or irregular, and the shape and size of the protruding portions at the two ends of the rock specimen 3 may be different.
In the present embodiment, as shown in fig. 1, 4-7, the left stand 11 includes a left upper stand 111 and a left lower stand 112 which are connected in a liftable manner; the right vertical frame 12 comprises a right upper vertical frame 121 and a right lower vertical frame 122 which are connected in a lifting way; in this embodiment, the left upper vertical frame 111, the left lower vertical frame 112, the right upper vertical frame 121 and the right lower vertical frame 122 are all of a single solid structure, and the vertical jacks 15 are respectively connected between the left upper vertical frame 111 and the left lower vertical frame 112, and between the right upper vertical frame 121 and the right lower vertical frame 122, so as to realize the connection in a lifting manner; as shown in fig. 4, two vertical jacks 15 are connected between the left upper stand 111 and the left lower stand 112, and likewise, two vertical jacks 15 are connected between the right upper stand 121 and the right lower stand 122, respectively, so that the left upper stand 111 and the right upper stand 121 are more stable when lifted up; specifically, two cavities are respectively arranged in the solid structures of the left upper vertical frame 111, the left lower vertical frame 112, the right upper vertical frame 121 and the right lower vertical frame 122, the two cavities in the left upper vertical frame 111 and the left lower vertical frame 112 are respectively communicated, the two cavities in the right upper vertical frame 121 and the right lower vertical frame 122 are respectively communicated, and a vertical jack 15 is arranged in each communicated cavity; the fixed end of each vertical jack 15 is connected with the left lower vertical frame 112 or the right lower vertical frame 122, and the movable end is correspondingly connected with the left upper vertical frame 111 or the right upper vertical frame 121; in some embodiments, the number of the vertical jacks 15 may be one, or may be more than three; in some embodiments, the left upper vertical frame 111, the left lower vertical frame 112, the right upper vertical frame 121, and the right lower vertical frame 122 are constructed by a plurality of vertical beams and connecting beams, in which form the left upper vertical frame 111 and the vertical beams of the left lower vertical frame 112 can be connected, the right upper vertical frame 121 and the vertical beams of the right lower vertical frame 122 are connected, and the vertical jacks 15 are respectively arranged inside the connected vertical beams.
In the present embodiment, as shown in fig. 1, 5 to 7, the cross member includes an upper cross member 13 and a lower cross member 14; the upper cross beam 13 is connected between the left upper vertical frame 111 and the right upper vertical frame 121, and the lower cross beam 14 is connected between the left lower vertical frame 112 and the right lower vertical frame 122; in the present embodiment, as shown in fig. 5 to 7, the upper beam 13 and the lower beam 14 are both a monolithic solid structure, and have a rectangular cross section; in some embodiments, the cross sections of the upper beam 13 and the lower beam 14 can also be square, circular, etc., and the upper beam 13 and the lower beam 14 can also be composed of a plurality of parallel single beams.
In the present embodiment, as shown in fig. 1, 5-7, the left clamp 21 includes an upper left clamping piece 211 and a lower left clamping piece 212 that are disposed in an up-down symmetrical manner, the right clamp 22 includes an upper right clamping piece 221 and a lower right clamping piece 222 that are disposed in an up-down symmetrical manner, the surfaces of the upper left clamping piece 211 and the lower left clamping piece 212 that are close to each other and the surfaces of the upper right clamping piece 221 and the lower right clamping piece 222 that are close to each other are all provided with grooves, the left accommodating cavity 23 is formed by the abutting joint of the grooves respectively provided on the upper left clamping piece 211 and the lower left clamping piece 212, and the right accommodating cavity 24 is formed by the abutting joint of the grooves respectively provided on the upper right clamping piece 221 and the lower right clamping piece 222; in this embodiment, as shown in fig. 1 and fig. 3, the left accommodating cavity 23 and the right accommodating cavity 24 are both cylindrical, and the shapes of the left accommodating cavity 23 and the right accommodating cavity 24 are matched with the shapes of the convex parts at the two ends of the rock test piece 3, so that the left accommodating cavity 23 and the right accommodating cavity 24 can be in full contact with the convex parts at the two ends of the rock test piece 3, stress concentration is further avoided, and the accuracy of the tensile strength test result of the rock test piece 3 is improved; as shown in fig. 7, the front end of the left accommodating chamber 23 has a circular reduced cross section, and similarly, the front end of the right accommodating chamber 24 has a circular reduced cross section, and the inner walls of the left accommodating chamber 23 and the right accommodating chamber 24 are smoothly transited to the corresponding reduced positions; in some embodiments, the upper left and lower clamps 211 and 212, the upper right and lower clamps 221 and 222 may be respectively asymmetric according to the shape of the rock specimen 3, only the requirement that the left and right accommodating cavities 23 and 24 can respectively accommodate the convex parts at the two ends of the rock specimen 3 is satisfied, and the necking of the front ends of the left and right accommodating cavities 23 and 24 is respectively smaller than the convex parts of the rock specimen 3; the left clamp 21 and the right clamp 22 are split into an upper part and a lower part, so that the rock test piece 3 is placed into the left clamp 21 and the right clamp 22, and the convex parts at two ends of the rock test piece 3 are respectively positioned in the left accommodating cavity 23 and the right accommodating cavity 24; in some embodiments, the left clamp 21 and the right clamp 22 are both split into a front part and a rear part, so that the convex parts at the two ends of the rock test piece 3 are respectively placed in the left accommodating cavity 23 and the right accommodating cavity 24; in other embodiments, the rock test piece 3 can be placed by opening the upper part or the side part of the left accommodating cavity 23 and the right accommodating cavity 24.
In the present embodiment, as shown in fig. 1, the upper left clamping piece 211 and the upper right clamping piece 221 are slidably connected to the upper beam 13, and the lower left clamping piece 212 and the lower right clamping piece 222 are slidably connected to the lower beam 14, so as to achieve the slidable connection between the left clamp 21 and the right clamp 22 and the beam, respectively, and to make the left clamp 21 and the right clamp 22 more stable when sliding; as shown in fig. 6-7, the upper left clamping member 211, the upper right clamping member 221, the lower left clamping member 212 and the lower right clamping member 222 are slidably connected to the upper beam 13 or the lower beam 14 through the sliding frame 26 sleeved on the upper beam 13 or the lower beam 14; two sliding frames 26 are respectively sleeved on the upper cross beam 13 and the lower cross beam 14; the two sliding frames 26 of the upper cross beam 13 can slide along the upper cross beam 13 and are respectively fixedly connected with the upper left clamping piece 211 and the upper right clamping piece 221; the two sliding frames 26 of the lower cross beam 14 can slide along the lower cross beam 14 and are respectively and fixedly connected with the left lower clamping piece 212 and the right lower clamping piece 222; in some embodiments, the slidable connection of the upper left clamping piece 211, the upper right clamping piece 221, the lower left clamping piece 212 and the lower right clamping piece 222 with the upper cross beam 13 and the lower cross beam 14 respectively can also be realized by providing a recessed slideway on the upper cross beam 13 and the lower cross beam 14 and providing a sliding rail on the upper left clamping piece 211, the upper right clamping piece 221, the lower left clamping piece 212 and the lower right clamping piece 222 to embed into the slideway.
In this embodiment, as shown in fig. 1, 6 and 7, a horizontal jack 25 is connected between the upper left clamping piece 211 and the upper right clamping piece 221, and between the lower left clamping piece 212 and the lower right clamping piece 222, respectively, the horizontal jack 25 jacks up to separate the upper left clamping piece 211 and the upper right clamping piece 221 from each other, and simultaneously separate the lower left clamping piece 212 and the lower right clamping piece 222 from each other, so as to stretch the rock test piece 3, and realize automation of the device.
The above examples are used for exemplifying the rock tensile strength testing device of the present invention, and do not constitute a limitation to the protection scope of the present invention.
The method for testing the tensile strength of the rock by using the device for testing the tensile strength of the rock of the utility model is concretely explained below, and the method comprises the following steps:
s1, placing the processed rock test piece 3 in the clamp 2, and enabling the protruding parts at the two ends of the rock test piece 3 to be respectively accommodated in the left accommodating cavity 23 and the right accommodating cavity 24 of the clamp 2, wherein the rock test piece 3 is clamped at a test position at the moment; in the present embodiment, step S1 is implemented by the following substeps S1a-S1 c:
s1a, the vertical jack 15 is jacked up to lift the left upper vertical frame 111 and the right upper vertical frame 121, and drives the upper cross beam 13 to lift up, and further drives the left upper clamping piece 211 and the right upper clamping piece 221 to lift up to separate from the left lower clamping piece 212 and the right lower clamping piece 222, respectively, until the left upper clamping piece 211 and the right upper clamping piece 221 are in proper positions;
s1b, placing the processed rock test piece 3 on the left lower clamping piece 212 and the right lower clamping piece 222, and enabling the convex parts at two ends of the rock test piece 3 to be respectively positioned in the grooves of the left lower clamping piece 212 and the right lower clamping piece 222;
s1c, the vertical jack 15 falls back to lower the left upper support and the right upper support, the upper cross beam 13 is driven to move downwards, the left upper clamping piece 211 and the right upper clamping piece 221 are further driven to fall down to be respectively attached to the left lower clamping piece 212 and the right lower clamping piece 222, the grooves of the left upper clamping piece 211 and the right upper clamping piece 221 are respectively butted with the grooves of the left lower clamping piece 212 and the right lower clamping piece 222, and the protruding parts at the two ends of the rock test piece 3 are respectively accommodated in the left accommodating cavity 23 and the right accommodating cavity 24 of the clamp 2.
S2, applying external force to the left clamp 21 and the right clamp 22 to enable the left clamp 21 and the right clamp 22 to slide along the cross beam in the direction away from each other, and stretching the rock test piece 3 until the rock test piece 3 is broken by pulling; recording an external force value applied when the rock test piece 3 is damaged;
the specific implementation manner of step S2 in this embodiment is: the horizontal jack 25 is jacked up to enable the left upper clamping piece 211 and the right upper clamping piece 221 to be away from each other, and meanwhile, the left lower clamping piece 212 and the right lower clamping piece 222 are away from each other, so that the rock test piece 3 is stretched until the rock test piece 3 is broken by pulling; recording the jacking force value of the horizontal jack 25 when the rock test piece 3 is damaged;
before performing step S2, the positions of the left and right clamps 21 and 22 may be finely adjusted to eliminate the gap between the rock specimen 3 and the left and right clamps 21 and 22.
And S3, calculating the tensile strength of the rock according to the section size of the broken part of the rock test piece 3 and the external force value recorded in the step S2, and finishing the test.
To sum up, according to the utility model discloses a rock tensile strength testing arrangement rock test piece slippage's problem from anchor clamps when having solved experimental, and the device compact structure, be convenient for operation, experimental accuracy are high, therefore are particularly useful for the application scenario of rock tensile strength test.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The rock tensile strength testing device is characterized by comprising a bracket (1) and a clamp (2);
the support (1) comprises a left vertical frame (11), a right vertical frame (12) and a cross beam connected between the left vertical frame (11) and the right vertical frame (12);
anchor clamps (2) include with the equal sliding connection's of crossbeam left anchor clamps (21) and right anchor clamps (22), left side anchor clamps (21) and right anchor clamps (22) interval set up, and the one end that is close to each other of left anchor clamps (21) and right anchor clamps (22) is inside to form left holding chamber (23) and right holding chamber (24) respectively, left side holding chamber (23) and right holding chamber (24) front end form the throat respectively, just the throat of left side holding chamber (23) and right holding chamber (24) sets up relatively.
2. The rock tensile strength testing device of claim 1, wherein the cross beam comprises an upper cross beam (13) and a lower cross beam (14), and the left clamp (21) and the right clamp (22) are slidably connected with the upper cross beam (13) and the lower cross beam (14) respectively so as to realize slidable connection of the left clamp (21) and the right clamp (22) with the cross beam.
3. The rock tensile strength testing device of claim 2, wherein the left clamp (21) comprises an upper left clamping piece (211) and a lower left clamping piece (212), the right clamp (22) comprises an upper right clamping piece (221) and a lower right clamping piece (222), the surfaces of the upper left clamping piece (211) and the lower left clamping piece (212) which are close to each other and the surfaces of the upper right clamping piece (221) and the lower right clamping piece (222) which are close to each other are provided with grooves, and the left accommodating cavity (23) is formed by the butt joint of the grooves respectively provided on the upper left clamping piece (211) and the lower left clamping piece (212); the right accommodating cavity (24) is formed by butt joint of grooves respectively formed in the upper right clamping piece (221) and the lower right clamping piece (222); the left upper clamping piece (211) and the right upper clamping piece (221) are both connected with the upper cross beam (13) in a sliding mode, the left lower clamping piece (212) and the right lower clamping piece (222) are both connected with the lower cross beam (14) in a sliding mode, and therefore the left clamp (21) and the right clamp (22) are connected with the upper cross beam (13) and the lower cross beam (14) in a sliding mode respectively.
4. The rock tensile strength testing device of claim 3, wherein the upper left clamping piece (211), the upper right clamping piece (221), the lower left clamping piece (212) and the lower right clamping piece (222) are slidably connected with the upper cross beam (13) or the lower cross beam (14) through a sliding frame (26) sleeved on the upper cross beam (13) or the lower cross beam (14); the two sliding frames (26) are respectively sleeved on the upper cross beam (13) and the lower cross beam (14), the two sliding frames (26) of the upper cross beam (13) are respectively fixedly connected with the upper left clamping piece (211) and the upper right clamping piece (221), and the two sliding frames (26) of the lower cross beam (14) are respectively fixedly connected with the lower left clamping piece (212) and the lower right clamping piece (222).
5. The rock tensile strength testing device of claim 3, wherein the left stand (11) comprises a left upper stand (111) and a left lower stand (112) which are connected in a lifting manner; the right vertical frame (12) comprises a right upper vertical frame (121) and a right lower vertical frame (122) which are connected in a lifting way; the upper cross beam (13) is connected between the left upper vertical frame (111) and the right upper vertical frame (121), and the lower cross beam (14) is connected between the left lower vertical frame (112) and the right lower vertical frame (122).
6. The rock tensile strength testing device of claim 5, wherein vertical jacks (15) are respectively connected between the left upper stand (111) and the left lower stand (112) and between the right upper stand (121) and the right lower stand (122).
7. The rock tensile strength testing device according to claim 6, wherein two vertical jacks (15) are respectively connected between the left upper stand (111) and the left lower stand (112), and between the right upper stand (121) and the right lower stand (122).
8. The rock tensile strength testing device according to any one of claims 3 to 7, wherein a horizontal jack (25) is connected between the upper left clamping piece (211) and the upper right clamping piece (221), and between the lower left clamping piece (212) and the lower right clamping piece (222), respectively.
9. The rock tensile strength testing device of claim 1, wherein the left accommodating cavity (23) and the right accommodating cavity (24) are both cylindrical, the necking cross sections of the front ends of the left accommodating cavity (23) and the right accommodating cavity (24) are both circular, and the inner walls of the left accommodating cavity (23) and the right accommodating cavity (24) are in smooth transition to the corresponding necking positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220681394.1U CN217211946U (en) | 2022-03-25 | 2022-03-25 | Rock tensile strength testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220681394.1U CN217211946U (en) | 2022-03-25 | 2022-03-25 | Rock tensile strength testing arrangement |
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| Publication Number | Publication Date |
|---|---|
| CN217211946U true CN217211946U (en) | 2022-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220681394.1U Active CN217211946U (en) | 2022-03-25 | 2022-03-25 | Rock tensile strength testing arrangement |
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| CN (1) | CN217211946U (en) |
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- 2022-03-25 CN CN202220681394.1U patent/CN217211946U/en active Active
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