CN202166401U

CN202166401U - Sucker fixed adjustable strain testing apparatus

Info

Publication number: CN202166401U
Application number: CN2011201275060U
Authority: CN
Inventors: 王立峰; 肖子旺; 宋传中; 冯明硕
Original assignee: Northeast Forestry University
Current assignee: Northeast Forestry University
Priority date: 2011-04-27
Filing date: 2011-04-27
Publication date: 2012-03-14
Anticipated expiration: 2021-04-27

Abstract

The utility model relates to a sucker fixed adjustable strain testing apparatus, which is applied in the strain test for bridge detection. The sucker fixed adjustable strain testing apparatus includes a left side gauge rack (6), a right side gauge rack (8), a fine tuning screw rod (16) and a dial gauge (5). A long groove (3) is arranged at one end of the left side gauge rack (6) along the length direction; a fixed bolt (15) of the sucker is slidingly arranged in the long groove (3), the fine tuning screw rod (16) is fixedly arranged at the other end of the left side gauge rack (6); the tail end of the screw rod (16) is provided with a block (9); the block (9) is contacted to a dial gauge probe (17); and the dial gauge (5) is arranged on the right side gauge rack (8). The left side gauge rack (6) and the right side gauge rack (8) are both provided with suckers (1). In the utility model, the structure of the apparatus is simple, the fixation is firm, the sucker fixed adjustable strain testing apparatus is convenient for adjustment, and the accuracy of the dial gauge reading is guaranteed.

Description

Sucker is the convenient regulating type strain detection testing device fixedly

(1) technical field

The utility model relates to a kind of bridge pick-up unit.Be applied to the strain testing process of single-beam and the whole bridge test of bridge in detecting etc.

(2) background technology

Clock gauge and stationary installation thereof are the strain testing instruments that is widely used during bridge detects, and clock gauge is to convert general straight-line displacement to pointer rotatablely move through gear or lever, on index dial, carries out the length measuring instrument of reading then.In the actual engineering; Variation through the clock gauge pointer; Obtain the total displacement Δ L of beam body segment mark in the L scope; And be converted into that strain

utilizes linear regression and ess-strain again concern σ=E * ε; Confirm beam body section stress σ; Whether bending bearing capacity and technical feature in order to the demonstration test beam satisfy the design and use requirement, and keeping in repair or abolish for reasonable use, the reinforcing of precast beam and whole bridge provides foundation.

The fixing of clock gauge and beam body is step more time-consuming in the testing process, that require great effort, take material always.The disposable adhesive material of the many employings of classic method does not have reuse, and promptly uneconomical also not environmental protection brings a difficult problem often for the steady job of clock gauge.

Clock gauge is because precision is high, and the adjusting before its reading is an elaboration, and the clock gauge regulative mode of traditional test device is comparatively single, and efficient, accuracy that the clock gauge initial reading is regulated await improving.

(3) summary of the invention

The purpose of the utility model is to overcome above deficiency, realize that efficient, economy and the clock gauge initial reading of strain detection testing device fixation procedure regulate fast, accuracy.

The purpose of the utility model is to provide fixedly convenient regulating type strain detection testing device of a kind of sucker; Its composition comprises left side dial framework, right side dial framework, fine setting screw rod and clock gauge; One end of left side dial framework is provided with elongated slot along its length, and sliding in the elongated slot is provided with the set bolt of sucker, and the other end of left side dial framework fixedly installs the fine setting screw rod; The tail end that screw rod is provided with vernier adjustment knob and screw rod is provided with block; Block contacts with the clock gauge gauge head, and clock gauge is arranged on the dial framework of right side, is equipped with sucker on left side dial framework and the right side dial framework.

In process of the test; When test beam body produced micro-displacement in the gauge length scope after, left side dial framework and right side dial framework were respectively to two side shiftings, and drive clock gauge gauge head extends laterally; The reading of clock gauge is changed, thereby draw the shift value of test beam body in the gauge length scope.

The utility model sucker is the convenient regulating type strain detection testing device fixedly; Through powerful absorption type sucker the clock gauge dial framework is fixed in Liang Tishang; Can realize clock gauge fixing firmly, easily and fast; And the mode that the utility model adopts coarse adjustment to combine with fine adjustment can effectively improve efficient, accuracy that the clock gauge initial reading is regulated.

(4) description of drawings

Fig. 1 is the fixing elevational schematic view of convenient regulating type strain detection testing device of sucker;

Fig. 2 is the vertical view of Fig. 1;

Reference numeral among the figure:

Sucker 1, the nut 2 of screwing, elongated slot 3, vernier adjustment knob 4, clock gauge 5, left side dial framework 6, fixture block 7, right side dial framework 8, block 9, sleeve 10, steel pad 11, sucker locking button 12, exhaust rubber cushion 13, fixed knob 14, set bolt 15, fine setting screw rod 16, clock gauge gauge head 17.

(5) embodiment

Referring to Fig. 2, the utility model relates to fixedly convenient regulating type strain detection testing device of a kind of sucker in bridge detects, and mainly is made up of left side dial framework 6, right side dial framework 8, fine setting screw rod 16 and clock gauge 5, and the practical implementation measure is following:

The first step is fixed in Liang Tishang through powerful absorption type sucker 1 respectively with left side dial framework 6, right side dial framework 8, keep certain gauge length, and two dial frameworks will remain on the same horizontal line.The structure of powerful electromagnetic chuck comprises exhaust rubber cushion 13, sucker locking button 12, steel pad 11, set bolt 15.

Second step was sandwiched in clock gauge sleeve 10 on the fixture block 7, and the gauge head 17 of clock gauge contacts with the block 9 of left side dial framework 6; And guarantee to show to have certain first registration, block 9 is fixing through fixed knob 14, when the gauge head 17 of clock gauge does not contact with the block 9 of left side dial framework; Or compressed into the length of sleeve 10 when excessive by block; Can the direction translation of left side dial framework 6 along the elongated slot 3 of himself be realized coarse adjustment, make clock gauge 5 obtain the valid reading scope.

In the 3rd step, the first registration through vernier adjustment knob 4 is regulated clock gauge 5 realizes fine adjustment, has suitable first registration to guarantee clock gauge 5.

In the 4th step, device is carried out installation check, the assurance device fixation.

Load by the design load equivalence, when test beam body produced micro-displacement in the gauge length scope after, left side dial framework 6 and right side dial framework 8 were respectively to two side shiftings; And drive clock gauge gauge head 17 elongation laterally, the reading of clock gauge 5 is changed, treat that indicator is stable after; Read the clock gauge registration; Two registrations are subtracted each other, and promptly obtain the total displacement Δ L of beam body in gauge length L scope, and can be exchanged into corresponding strain value.

Claims

1. the fixing convenient regulating type strain detection testing device of a sucker; Its composition comprises left side dial framework (6), right side dial framework (8), fine setting screw rod (16) and clock gauge (5); It is characterized in that: an end of left side dial framework (6) is provided with elongated slot (3) along its length, slides in the elongated slot (3) set bolt (15) of sucker is set, and the other end of left side dial framework (6) fixedly installs fine setting screw rod (16); The tail end that screw rod (16) is provided with vernier adjustment knob (4) and screw rod (16) is provided with block (9); Block (9) contacts with clock gauge gauge head (17), and clock gauge (5) is arranged on the right side dial framework (8), is equipped with sucker (1) on left side dial framework (6) and the right side dial framework (8).

2. sucker according to claim 1 is the convenient regulating type strain detection testing device fixedly, it is characterized in that: fixing all absorption fixations through powerful absorption type sucker (1) of clock gauge left side dial framework (6), right side dial framework (8) realize.