Uniaxial compressive strength detection clamp for highway engineering rock

Abstract

The utility model relates to the technical field of rock compressive strength measurement, in particular to a highway engineering rock uniaxial compressive strength detection clamp which comprises a rack, a detection mechanism and a control mechanism, a linear driver and a clamping block are arranged on the rack, the clamping block is movably arranged on the rack, and the linear driver is used for driving the clamping block to move; the detection mechanism comprises a mounting seat and a supporting seat, the mounting seat is arranged on the clamping block in a sliding manner, the supporting seat is movably arranged on the mounting seat, a detection block is arranged on the supporting seat, and a detection end for detecting a gap between the clamping block and the sample is arranged on the detection block; the control mechanism comprises a linear driving assembly and an elastic connecting assembly, the linear driving assembly is arranged on the clamping block and used for driving the mounting base to move, and the elastic connecting assembly is used for connecting the mounting base, the support and the detection block. According to the utility model, the function of detecting the flatness of the sample after the sample is clamped is realized. The problem that the flatness of a sample needs to be detected before the sample is clamped by a traditional clamp is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rock compressive strength measurement technical field, concretely relates to a highway engineering rock single -axial compressive strength detection clamp. BACKGROUND

[0002] When the uniaxial compressive strength of rock is tested, if rebound test is adopted, the operator needs to hold the rebound tester for testing. However, when the support force provided by the operator is not enough to stably support the rebound tester, the rebound tester and the sample will move relatively, thereby affecting the test result.

[0003] Therefore, Chinese patent application CN116558946A discloses a rock uniaxial compressive strength measuring device. When impact test is performed, the clamping mechanism clamps the rock sample, and the operator does not need to provide a counterforce to the measuring device. Moreover, the bottom end of the impact head is provided with at least one downwardly protruding arc-shaped rib. The lower end of the arc-shaped rib is in line contact with the upper end of the rock sample, thereby reducing the influence of the measured position on the measurement result and reducing the discreteness of the measurement data.

[0004] In highway engineering, a press is usually used to apply pressure to the sample for rock uniaxial compressive strength testing. During the testing process, the sample needs to be supported and fixed by a clamp to ensure that the sample is stable and bears uniform axial pressure during the test, so as to obtain accurate results. Before testing, the flatness of the sample also needs to be tested to avoid stress concentration and premature damage due to uneven surface, and to ensure stable contact between the clamp and the sample and improve clamping stability. However, the existing clamp can only clamp the sample. Before testing, the operator needs to measure the flatness separately, which is time-consuming and labor-intensive. UTILITARIAN CONTENT

[0005] In view of the above problems, a highway engineering rock single-axial compressive strength detection clamp is provided. The rack, detection mechanism and control mechanism solve the problem that the traditional clamp needs to detect the flatness of the sample before clamping the sample.

[0006] To solve the problems in the prior art, the utility model provides a highway engineering rock single -axial compressive strength detection clamp, including rack, detection mechanism and control mechanism, be equipped with linear driver and clamping block on the rack, clamping block is movably arranged on the rack, and linear driver is used for driving clamping block to move, detection mechanism includes mounting seat and support, mounting seat is slidably arranged on clamping block, support is movably arranged on mounting seat, support is equipped with detection block, detection block is equipped with detection end for detecting the gap between clamping block and sample, control mechanism includes linear drive assembly and elastic connection assembly, linear drive assembly is arranged on clamping block, and linear drive assembly is used for driving mounting seat to move, and elastic connection assembly is used for connecting mounting seat, support and detection block.

[0007] Preferably, the detection end of the detection block is provided with a right-angle wedge block, and the mounting seat is provided with a contact sensor; in the working state, when the detection block is inserted into the gap between the test sample and the clamping block, the detection block abuts against the contact sensor.

[0008] Preferably, the detection end of the detection block is provided with a right-angle wedge block, and the mounting seat is provided with a contact sensor; in the working state, when the detection block is inserted into the gap between the test sample and the clamping block, the detection block abuts against the contact sensor.

[0009] Preferably, the linear driving assembly comprises a rotary driver, a screw rod, two pulleys and a transmission belt; the rotary driver is mounted on the clamping block; the screw rod is rotatably mounted on the clamping block, and the mounting seat is threadedly connected with the screw rod; the two pulleys are respectively sleeved on the driving end of the rotary driver and the screw rod; and the transmission belt connects the two pulleys.

[0010] Preferably, the elastic connecting assembly comprises a nitrogen spring and an elastic piece; the nitrogen spring is arranged on the support, and the piston rod of the nitrogen spring is connected with the detection block; and the two ends of the elastic piece are respectively connected with the support and the mounting seat.

[0011] Preferably, the end portion of the piston rod of the nitrogen spring is provided with an end seat, and the detection block is connected with the end seat through bolts.

[0012] The utility model discloses compared with prior art has the beneficial effects of:

[0013] 1. The utility model discloses a rack, detection mechanism and control mechanism realize the function of detecting the flatness of test sample after clamping test sample. It can judge the flatness of test sample by inserting the detection block into the gap between test sample and clamping block after clamping test sample, improve the detection accuracy, ensure the stable adhesion of clamping block and test sample surface, improve the clamping stability of test sample, solve the problem that traditional clamp needs to detect the flatness of test sample before clamping test sample.

[0014] 2. The utility model discloses a contact sensor and right-angle wedge block realize the function of automatically judging whether the detection block is stuck in the gap between test sample and clamping block, achieve the effect of automatically judging the flatness of test sample. When the detection block is stuck in the gap between test sample and clamping block, the detection block and the mounting seat approach each other under the elastic force of the elastic connecting assembly, the detection block contacts the contact sensor, the contact sensor feeds back the signal to the controller, and the controller stops the driving of the linear driving assembly, avoiding the damage of the detection block due to the excessive force caused by the blocked movement. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a stereogram of a highway engineering rock uniaxial compressive strength detection clamp.

[0016] Figure 2 It is a stereogram of a clamping block and control mechanism in a highway engineering rock uniaxial compressive strength detection clamp.

[0017] Figure 3 is the highway engineering rock uniaxial compressive strength detection clamp of the utility model Figure 2 the local enlarged view of A in the middle.

[0018] Figure 4 is the highway engineering rock uniaxial compressive strength detection clamp of the utility model a kind of highway engineering rock uniaxial compressive strength detection clamp first embodiment of detection block three-dimensional schematic view.

[0019] Figure 5 is the highway engineering rock uniaxial compressive strength detection clamp of the utility model a kind of highway engineering rock uniaxial compressive strength detection clamp second embodiment of detection block three-dimensional schematic view.

[0020] Figure 6 is the highway engineering rock uniaxial compressive strength detection clamp of the utility model a kind of highway engineering rock uniaxial compressive strength detection clamp second embodiment of detection block plan view.

[0021] In the drawing, reference numerals are: 1-frame;11-linear driver;12-clamping block;2-detection mechanism;21-mounting seat;211-contact sensor;212-distance sensor;22-stand;221-detection block;2211-right-angle wedge;2212-oblique-angle wedge;3-control mechanism;31-linear drive assembly;311-rotary driver;312-screw;313-belt pulley;314-transmission belt;32-elastic connection assembly;321-nitrogen spring;3211-end seat;3212-bolt;322-elastic member;4-sample. DETAILED DESCRIPTION

[0022] To further understand the features, technical means and specific purposes achieved by the utility model, and the functions, the utility model is described in detail below in conjunction with the drawings and specific embodiments.

[0023] Refer to Figure 1 And Figure 2 : a kind of highway engineering rock uniaxial compressive strength detection clamp, including frame 1, detection mechanism 2 and control mechanism 3;Frame 1 is equipped with linear driver 11 and clamping block 12, clamping block 12 is movably arranged on frame 1, and linear driver 11 is used to drive clamping block 12 to move;Detection mechanism 2 includes mounting seat 21 and stand 22, mounting seat 21 is slidably arranged on clamping block 12, stand 22 is movably arranged on mounting seat 21, and stand 22 is equipped with detection block 221, and detection block 221 is equipped with detection end for detecting the gap between clamping block 12 and sample 4;Control mechanism 3 includes linear drive assembly 31 and elastic connection assembly 32, linear drive assembly 31 is arranged on clamping block 12, and linear drive assembly 31 is used to drive mounting seat 21 to move, and elastic connection assembly 32 is used to connect mounting seat 21, stand 22 and detection block 221.

[0024] The utility model discloses a rack 1, detection mechanism 2 and control mechanism 3 realize the function of detecting the flatness of sample 4 after clamping sample 4. It can judge the flatness of sample 4 by the clearance between detection block 221 and clamp block 12 after clamping sample 4, improve the detection accuracy, guarantee the stable adhesion of clamp block 12 and sample 4 surface, improve the clamping stability of sample 4, solve the problem that traditional clamp needs to detect the flatness of sample 4 before clamping sample 4. When detecting the uniaxial compressive strength of sample 4, it is necessary to guarantee that sample 4 is under uniform stress when being pressed, therefore, it is necessary to guarantee the flatness of sample 4, avoid stress concentration and premature failure caused by uneven sample 4 surface. Linear driver 11 is preferably hydraulic cylinder, hydraulic cylinder is connected with clamp block 12 through push rod, and rack 1 is equipped with controller for man-machine interaction, and linear driver 11 and linear drive assembly 31 are electrically connected with the controller. When clamping, the operator places sample 4 between two clamp blocks 12, and then drives two clamp blocks 12 to approach each other through linear driver 11, until the two ends of clamp block 12 abut with the two ends of sample 4 respectively, and the clamping of sample 4 is completed. At this time, the detection end of detection block 221 abuts with the surface of sample 4, then the operator sends a signal to linear drive assembly 31 through the controller, and linear drive assembly 31 controls the movement of mounting seat 21 after receiving the signal, and mounting seat 21 drives support 22 and detection block 221 to move through elastic connecting assembly 32, so that detection block 221 can move along the contact position of clamp block 12 and sample 4 surface. If the clearance of the contact position of clamp block 12 and sample 4 exceeds the threshold value, detection block 221 is clamped in the clearance under the action of the elastic force of elastic connecting assembly 32 when moving to the clearance, and the movement of detection block 221 is blocked. When the operator observes this phenomenon, it indicates that the flatness of sample 4 does not meet the standard. If the flatness of sample 4 meets the standard, detection block 221 will not be clamped between clamp block 12 and sample 4 when completing the whole moving stroke.

[0025] Referring to Figure 2 And Figure 4 : the detection end of detection block 221 is equipped with right-angle wedge block 2211, and mounting seat 21 is equipped with contact sensor 211;In the working state, when detection block 221 inserts the clearance between sample 4 and clamp block 12, detection block 221 abuts with contact sensor 211.

[0026] As the first embodiment of the detection block 221 in the utility model, the function of automatically judging whether the detection block 221 is clamped between the test sample 4 and the clamp block 12 is realized through the contact sensor 211 and the right-angle wedge block 2211, and the effect of automatically judging the flatness of the test sample 4 is achieved. When the detection block 221 is clamped in the gap between the test sample 4 and the clamp block 12, the detection block 221 and the mounting seat 21 are close to each other under the elastic force of the elastic connecting assembly 32, after the detection block 221 contacts the contact sensor 211, the contact sensor 211 feeds back a signal to the controller, the controller stops the driving of the linear driving assembly 31, and the damage of the detection block 221 due to the excessive force caused by the blocked movement is avoided. During the detection process, the linear driving assembly 31 drives the mounting seat 21 to move. During the movement of the mounting seat 21 driving the detection block 221, if the gap width between the test sample 4 and the clamp block 12 exceeds the width of the right-angle wedge block 2211, the right-angle wedge block 2211 of the detection block 221 is clamped in the gap. Moreover, the detection block 221 contacts the contact sensor 211, the contact sensor 211 feeds back a signal to the controller, the controller stops the linear driving assembly 31, the flatness detection of the test sample 4 is completed, and the test sample 4 is stably clamped.

[0027] With reference to Figures 4-6 The detection end of the detection block 221 is provided with a bevel wedge block 2212; and the mounting seat 21 is provided with a distance sensor 212 for detecting the distance between the mounting seat 21 and the detection block 221.

[0028] As the second embodiment of the detection block 221 in the utility model, the function of judging the position of the detection block 221 is realized through the bevel wedge block 2212 and the distance sensor 212. When the flatness of the test sample 4 is detected, the insertion depth of the bevel wedge block 2212 of the detection block 221 changes with the width of the gap. Therefore, the expansion and contraction of the detection block 221 also fluctuates constantly, and the signal feedback by the distance sensor 212 records the distance change between the detection block 221 and the mounting seat 21. Not only the flatness of the test sample 4 can be judged, but also the flatness of the test sample 4 can be judged as a whole through the distance fluctuation between the detection block 221 and the mounting seat 21.

[0029] With reference to Figures 1-3 The linear driving assembly 31 comprises a rotary driver 311, a screw rod 312, two pulleys 313 and a transmission belt 314; the rotary driver 311 is installed on the clamp block 12; the screw rod 312 is rotatably installed on the clamp block 12, and the mounting seat 21 is threadedly connected with the screw rod 312; the two pulleys 313 are respectively sleeved on the driving end of the rotary driver 311 and the screw rod 312; and the transmission belt 314 connects the two pulleys 313.

[0030] The utility model discloses a rotating driver 311, screw rod 312, pulley 313 and transmission belt 314 realize the function of driving mounting seat 21 lifting. Rotating driver 311 preferably is micro servo motor, and rotating driver 311 is electrically connected with controller. After the clamping of sample 4 is completed, the operator sends signal to rotating driver 311 through controller, and rotating driver 311 receives the signal, and rotating driver 311 drives screw rod 312 to rotate with the help of pulley 313 and transmission belt 314, and then screw rod 312 drives mounting seat 21 that is connected with it to move. Subsequently, mounting seat 21 moves support 22 and detection block 221 through elastic connecting component 32, thereby the flatness of sample 4 is detected automatically after the clamping of sample 4.

[0031] Referring to Figure 2 And Figure 4 Elastic connecting component 32 includes nitrogen spring 321 and elastic element 322, nitrogen spring 321 is arranged on support 22, and the piston rod of nitrogen spring 321 is connected with detection block 221, and the two ends of elastic element 322 are connected with support 22 and mounting seat 21 respectively.

[0032] The utility model realizes the function of connecting mounting seat 21, support 22 and detection block 221 with the help of nitrogen spring 321 and elastic element 322, and realizes the function of exerting two directions elastic force to detection block 221. During the movement of detection block 221, support 22 will produce the tendency of moving towards sample 4 due to the elastic force of elastic element 322, and the elastic force will be transmitted to detection block 221 through support 22, so that detection block 221 abuts against the surface of sample 4. At the same time, nitrogen spring 321 will produce the pulling force to detection block 221, so that detection block 221 has the tendency of moving towards mounting seat 21. In this way, the detection end of detection block 221 can abut against the gap between clamp block 12 and the surface of sample 4, and when the width of the gap exceeds the width of the detection end, the detection end of detection block 221 will be clamped into the gap.

[0033] Referring to Figure 4 And Figure 5 The end of the piston rod of nitrogen spring 321 is provided with end seat 3211, and detection block 221 is connected with end seat 3211 through bolt 3212.

[0034] The utility model realizes the function of replacing detection block 221 of different specifications through end seat 3211 and bolt 3212. When the precision requirement of sample 4 is different, detection block 221 of different specifications needs to be used for detection. Therefore, bolt 3212 is arranged to connect detection block 221 and end seat 3211 of nitrogen spring 321. When replacing, the operator disassembles detection block 221 by rotating bolt 3212, and the convenience of replacing detection block 221 is improved significantly.

[0035] The above embodiment only expresses one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A highway engineering rock uniaxial compressive strength detection clamp, characterized in that, The utility model relates to a kind of detection device of sample, including rack (1), detection mechanism (2) and control mechanism (3); Linear driver (11) and clamping block (12) are provided on rack (1), clamping block (12) is movably arranged on rack (1), and linear driver (11) is used to drive clamping block (12) to move; Detection mechanism (2) includes mounting seat (21) and support (22), mounting seat (21) is slidably arranged on clamping block (12), support (22) is movably arranged on mounting seat (21), and support (22) is provided with detection block (221), and detection block (221) is provided with detection end for detecting the gap between clamping block (12) and sample (4); Control mechanism (3) includes linear drive assembly (31) and elastic connection assembly (32), linear drive assembly (31) is arranged on clamping block (12), and linear drive assembly (31) is used to drive mounting seat (21) to move, and elastic connection assembly (32) is used to connect mounting seat (21), support (22) and detection block (221).

2. The highway engineering rock uniaxial compressive strength detection clamp according to claim 1, characterized in that, The detection end of detection block (221) is provided with right-angle wedge (2211), and mounting seat (21) is provided with contact sensor (211); In working condition, when detection block (221) is inserted into the gap between sample (4) and clamping block (12), detection block (221) is in abutment with contact sensor (211).

3. The highway engineering rock uniaxial compressive strength detection clamp according to claim 1, characterized in that, The detection end of detection block (221) is provided with bevel wedge (2212); Mounting seat (21) is provided with distance sensor (212) for detecting the distance between mounting seat (21) and detection block (221).

4. The highway engineering rock uniaxial compressive strength detection clamp according to claim 1, characterized in that, Linear drive assembly (31) includes rotary driver (311), screw rod (312), pulley (313) and transmission belt (314); Rotary driver (311) is installed on clamping block (12); Screw rod (312) is rotatably installed on clamping block (12), and mounting seat (21) is threadedly connected with screw rod (312); Two pulleys (313) are provided, and the two pulleys (313) are respectively sleeved on the driving end of rotary driver (311) and screw rod (312); Transmission belt (314) connects the two pulleys (313).

5. The highway engineering rock uniaxial compressive strength detection clamp according to claim 1, characterized in that, Elastic connection assembly (32) includes nitrogen spring (321) and elastic member (322); Nitrogen spring (321) is arranged on support (22), and the piston rod of nitrogen spring (321) is connected with detection block (221); The two ends of elastic member (322) are respectively connected with support (22) and mounting seat (21).

6. The highway engineering rock uniaxial compressive strength detection clamp according to claim 5, characterized in that, The end of the piston rod of nitrogen spring (321) is provided with end seat (3211), and detection block (221) is connected with end seat (3211) through bolt (3212).

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