CN111595649A

CN111595649A - Cylindrical joint sample paster device

Info

Publication number: CN111595649A
Application number: CN202010510232.7A
Authority: CN
Inventors: 徐卫亚; 张涛; 王环玲; 黄威; 胡明涛; 王伟
Original assignee: Hohai University HHU
Current assignee: Hohai University HHU
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2020-08-28
Anticipated expiration: 2040-06-08
Also published as: CN111595649B

Abstract

The invention discloses a columnar joint sample paster device which comprises a support and a sample constraint structure, wherein the support comprises two groups of first lower supports and second lower supports which are symmetrically distributed, the first lower supports are positioned on the inner side of the second lower supports, adjusting rods are fixed at the tops of one group of second lower supports, an upper support is connected at the top of the other group of second lower supports, the tops of the two groups of first lower supports are both connected with upper supports, a lower constraint plate is arranged between the two groups of upper supports positioned at the tops of the first lower supports, an upper constraint plate is arranged between the upper supports positioned at the tops of the second lower supports and the adjusting rods, the upper constraint plate and the lower constraint plate form the sample constraint structure, and a longitudinal strain foil pasting port and a transverse strain foil pasting port are formed in the upper constraint plate. According to the invention, the rubber plate with strong flexibility is adopted to fix the columnar joint sample, so that the damage to the sample in the surface mounting process is reduced, and meanwhile, the T-shaped surface mounting port with a fixed position is arranged, so that the position can be fixed, and the reliability and accuracy of data acquisition are further ensured.

Description

Cylindrical joint sample paster device

Technical Field

The invention relates to a chip mounting device, in particular to a columnar joint sample chip mounting device.

Background

The deformation test of the columnar jointed rock mass is very important work in the geotechnical engineering construction process, and the physical model test of the columnar jointed rock mass is an important method for predicting the deformation rule of the columnar jointed rock mass. The method is characterized in that a high-precision axial differential displacement transducer (LVDT) and a lateral beam type lateral sensor are adopted to carry out axial and circumferential strain tests in a laboratory, a columnar joint sample is relatively developed in joint and relatively large in deformation, and a strain gauge is used for replacing the previous LVDT and the previous lateral sensor to carry out data acquisition. How to accurately determine the relative position of the patch in the axial direction and the transverse direction on the surface of a columnar joint sample with weak joint strength and reduce the damage to the sample in the patch process becomes a problem which needs to be solved in the preparation stage of the test, and the accuracy of the test is directly influenced.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a columnar joint sample paster device capable of accurately determining relative position of paster.

The technical scheme is as follows: the invention comprises a bracket and a sample constraint structure, wherein the bracket comprises two groups of first lower brackets and second lower brackets which are symmetrically distributed, the first lower brackets are positioned at the inner sides of the second lower brackets, adjusting rods are fixed at the tops of one group of the second lower brackets, the tops of the other group of the second lower brackets are connected with upper brackets, the tops of the two groups of the first lower brackets are both connected with upper brackets, a lower constraint plate is arranged between the two groups of the upper brackets positioned at the tops of the first lower brackets, an upper constraint plate is arranged between the upper brackets positioned at the tops of the second lower brackets and the adjusting rods, the upper constraint plate and the lower constraint plate form the sample constraint structure, and the upper constraint plate is provided with a longitudinal strain foil sticking port and a transverse strain foil sticking port.

One end of the adjusting rod is fixed with a rotary turntable, the other end of the adjusting rod is fixed with a fixed turntable, the fastening degree of the upper restraint plate to the columnar joint sample is controlled through the rotary turntable, and the upper restraint plate is fastened and fixed through the fixed turntable.

The upper and lower restraint plates are both rubber plates.

And fixing rods are arranged on two sides of the bracket and are connected with the first lower bracket and the second lower bracket which are positioned on the same side.

And suckers are fixed at the bottoms of the first lower support and the second lower support and are fixed on the test bed.

One end of the upper restraint plate is fixed on the adjusting rod, the other end of the upper restraint plate is sleeved on the upper support, and the fastening degree of the upper restraint plate to the columnar joint sample is controlled through the adjusting rod.

And two ends of the lower restraint plate are sleeved on the upper support.

Has the advantages that: according to the invention, the rubber plate with strong flexibility is adopted to fix the columnar joint sample, so that the damage to the sample in the surface mounting process is reduced, and meanwhile, the T-shaped surface mounting port with a fixed position is arranged, so that the position can be fixed, and the reliability and accuracy of data acquisition are further ensured.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in FIG. 1, the bracket and the sample constraint structure of the invention comprise two groups of first lower brackets 1 and second lower brackets 9 which are symmetrically distributed, wherein the first lower brackets 1 are positioned at the inner sides of the second lower brackets 9, adjusting rods 8 are fixed at the tops of the left groups of second lower brackets 9, the tops of the other groups of second lower brackets 9 are connected with upper brackets 4, the tops of the two groups of first lower brackets 1 are both connected with the upper brackets 4, and the upper brackets 4 are both detachably connected through bolts. Be equipped with down between two sets of upper bracket 4 that are located first lower carriage 1 top and retrain rubber slab 5 down, be located and be equipped with between the upper bracket 4 at second lower carriage 9 top and adjust the pole 8 and retrain rubber slab 6, go up and retrain rubber slab 6 and retrain rubber slab 5 down and constitute sample restraint structure, it pastes mouth 11 and horizontal foil gage and paste mouth 12 by the rubber slab that the flexibility is stronger to retrain rubber slab 5 down and retrain rubber slab 6 down, wherein, be equipped with vertical foil gage on the upper restraint rubber slab 6.

The fixing rods 3 are arranged on two sides of the support, and the fixing rods 3 are connected with the first lower support 1 and the second lower support 9 which are positioned on the same side through bolts. The bottom parts of the first lower bracket 1 and the second lower bracket 9 are both fixed with a sucker 2, and the sucker 2 is fixed on a test bed. One end of the upper constraint rubber plate 6 is fixed on the adjusting rod 8, and the other end is sleeved on the upper bracket 4; both ends of the lower constraint rubber plate 5 are sleeved on the upper bracket 4. One end of the adjusting rod 8 is fixed with a rotary turntable 7, the other end is fixed with a fixed turntable 10, the fastening degree of the cylindrical joint sample by the upper constraint rubber plate 6 is controlled by the rotary turntable 7, and the cylindrical joint sample is fastened and fixed by the fixed turntable 10.

The using method of the invention comprises the following steps:

(1) wiping the surface of the columnar joint sample to be pasted with the alcohol in a certain range;

(2) placing a columnar joint sample at the middle position between an upper constraint rubber plate 6 and a lower constraint rubber plate 5, and adjusting the surface of a position to be pasted with the sample to be pasted with the longitudinal strain gauge pasting port 11 and the transverse strain gauge pasting port 12;

(3) an adjusting rod 8 and a rotating turntable 7 are adopted to adjust an upper constraint rubber plate 6, a columnar joint sample is fastened, and the adjusting rod 8 is fixed through a fixed turntable 10, so that the adjusting rod 8 is ensured not to rotate;

(4) coating adhesive at the position to be pasted by the longitudinal strain foil pasting port 11 and the transverse strain foil pasting port 12, simultaneously uniformly coating the adhesive on the back of the strain foil, respectively placing the strain foil into the transverse strain foil pasting port 12 and the longitudinal strain foil pasting port 11 and pressing; and (3) loosening the fixed turntable 10, adjusting the rotary turntable 7, taking out the sample after the upper constraint rubber plate 6 is separated from the sample, coating silicon rubber and a lead for fixing and leading out the strain gauge on the strain gauge, connecting the joint of the strain gauge with the strain gauge, and performing a compression test on the columnar joint sample.

Claims

1. The columnar joint sample paster device is characterized by comprising a support and a sample constraint structure, wherein the support comprises two groups of first lower supports (1) and second lower supports (9) which are symmetrically distributed, the first lower supports (1) are positioned on the inner sides of the second lower supports (9), adjusting rods (8) are fixed at the tops of one group of second lower supports (9), an upper support (4) is connected at the top of the other group of second lower supports (9), the tops of the two groups of first lower supports (1) are both connected with upper supports (4), a lower constraint plate (5) is arranged between the two groups of upper supports (4) positioned at the tops of the first lower supports (1), an upper constraint plate (6) is arranged between the upper supports (4) positioned at the tops of the second lower supports (9) and the adjusting rods (8), and the upper constraint plate (6) and the lower constraint plate (5) form the sample constraint structure, and the upper restraint plate (6) is provided with a longitudinal strain foil pasting port (11) and a transverse strain foil pasting port (12).

2. The patch device for columnar joint samples according to claim 1, wherein the adjusting rod (8) is fixed with a rotary turntable (7) at one end and a fixed turntable (10) at the other end.

3. The patch device for columnar joint samples according to claim 1, wherein the upper and lower constraining plates (6, 5) are rubber plates.

4. The patch device for columnar joint samples according to claim 1, wherein the fixing rods (3) are arranged on both sides of the bracket, and the fixing rods (3) are connected with the first lower bracket (1) and the second lower bracket (9) which are positioned on the same side.

5. The patch device for columnar joint samples according to claim 1, wherein the suction cups (2) are fixed to the bottoms of the first lower holder (1) and the second lower holder (9).

6. A patch device for columnar joint samples according to claim 1 or 3, wherein the upper binding plate (6) is fixed at one end to the adjustment rod (8) and at the other end to the upper holder (4).

7. A patch device for a columnar joint sample according to claim 1 or 3, wherein both ends of the lower binding plate (5) are sleeved on the upper support (4).