CN202166401U - Suction cup fixed and adjustable strain test device - Google Patents

Abstract

The utility model relates to a suction cup fixed and adjustable strain test device, which is used in the strain test of bridge detection. It includes a left meter frame (6), a right meter frame (8), a fine-tuning screw (16) and a dial gauge (5). The device is provided with a long slot (3) along the length direction at one end of the left side table frame (6), and the fixing bolt (15) of the suction cup is slid in the long slot (3), and the other end of the left side table frame (6) is fixed Set the fine-tuning screw (16), the end of the screw (16) is provided with a stopper (9), the stopper (9) is in contact with the dial gauge probe (17), and the dial gauge (5) is arranged on the right side table on the rack (8). Suction cups (1) are all provided on the left table frame (6) and the right table frame (8). The structure of the device is simple, fixed firmly, easy to adjust, and can ensure the accuracy of the reading of the dial gauge.

Description

Suction cup fixed and adjustable strain test device

(1) Technical field

The utility model relates to a bridge detection device. It is applied to the strain test process of single girder and whole bridge test in bridge inspection. the

(2) Background technology

再利用线性回归及应力应变的关系σ＝E×ε，确定梁体截面应力σ，用以验证试验梁的抗弯承载能力及技术性能是否满足设计和使用要求，为预制梁及整桥的合理使用、加固维修或废除提供依据。  Dial gauges and their fixtures are strain testing instruments that are widely used in bridge inspections. Dial gauges are length measuring instruments that convert general linear displacement into rotational movement of pointers through gears or levers, and then read on the dial. . In actual engineering, the total displacement ΔL within the gauge length L range of a certain section of the beam body is obtained through the change of the pointer of the dial indicator, and converted into strain

Then use the linear regression and the stress-strain relationship σ=E×ε to determine the cross-sectional stress σ of the beam body to verify whether the flexural bearing capacity and technical performance of the test beam meet the design and use requirements, and provide a reasonable basis for the prefabricated beam and the entire bridge. Provide a basis for use, reinforcement maintenance or abolition.

The fixing of the dial indicator and the beam body has always been a time-consuming, labor-intensive and material-consuming step in the testing process. The traditional method mostly uses one-time pasting materials, which have no reusability, are neither economical nor environmentally friendly, and often bring difficulties to the fixing work of the dial indicator. the

Due to the high precision of the dial indicator, its adjustment before reading is a meticulous work. The adjustment method of the dial indicator in the traditional test device is relatively simple, and the efficiency and accuracy of the initial reading adjustment of the dial indicator need to be improved. the

(3) Contents of the invention

The purpose of the utility model is to overcome the above deficiencies, to realize the high efficiency and economy of the fixing process of the strain testing device and the fast and accurate adjustment of the initial reading of the dial indicator. the

The purpose of this utility model is to provide a suction cup fixed and adjustable strain testing device, which consists of a left meter frame, a right meter frame, a fine-tuning screw and a dial gauge. One end of the left meter frame is provided with a long groove along the length direction. , the fixed bolt of the suction cup is slid in the long slot, and the other end of the left table frame is fixed with a fine-tuning screw. There is a fine-tuning knob on the screw and a stopper at the end of the screw. The dial indicator is arranged on the right meter frame, and suction cups are arranged on the left meter frame and the right meter frame. the

During the test, when the test beam body has a slight displacement within the gauge length range, the left and right meter frames move to both sides respectively, and drive the dial gauge probe to extend outward, so that the dial gauge The reading of the test beam changes, so as to obtain the displacement value of the test beam within the gauge length range. the

The utility model adopts the suction cup fixed and adjustable strain testing device. The dial indicator frame is fixed on the beam body through the strong adsorption suction cup, so that the dial indicator can be fixed firmly, conveniently and quickly. The utility model adopts coarse adjustment and micro The combination of adjustments can effectively improve the efficiency and accuracy of the initial reading adjustment of the dial indicator. the

(4) Description of drawings

Figure 1 is a schematic diagram of the elevation of the suction cup fixed and adjustable strain test device;

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

Reference marks in the figure:

Suction cup 1, tightening nut 2, long slot 3, fine-tuning knob 4, dial indicator 5, left dial frame 6, clip block 7, right dial frame 8, stopper 9, sleeve 10, steel pad 11, suction cup Locking button 12, exhaust rubber pad 13, fixed knob 14, fixed bolt 15, fine-tuning screw rod 16, dial indicator probe 17. the

(5) Specific implementation methods

Referring to Fig. 2, the utility model relates to a suction cup fixed and adjustable strain testing device in bridge detection, which is mainly composed of a left meter frame 6, a right meter frame 8, a fine-tuning screw 16 and a dial indicator 5, and specific implementation measures as follows:

In the first step, the left watch frame 6 and the right watch frame 8 are respectively fixed on the beam body through strong adsorption suction cups 1, and a certain gauge distance is maintained, and the two watch frames are kept on the same horizontal line. The structure of the powerful suction cup includes an exhaust rubber pad 13, a suction cup locking button 12, a steel pad 11, and a fixing bolt 15. the

In the second step, the dial indicator sleeve 10 is clamped on the clamp block 7, the measuring head 17 of the dial indicator is in contact with the stopper 9 of the left meter frame 6, and the gauge has a certain initial reading, and the stopper 9. It is fixed by the fixing knob 14. When the measuring head 17 of the dial indicator is not in contact with the stopper 9 of the left meter stand, or the length of the sleeve 10 pressed into the sleeve 10 by the stopper is too large, the left meter stand 6 Translate along the direction of its own long groove 3 to realize coarse adjustment, so that the dial gauge 5 can obtain an effective reading range. the

The third step is to adjust the initial reading of the dial indicator 5 through the fine-tuning knob 4 to realize fine adjustment, so as to ensure that the dial indicator 5 has an appropriate initial reading. the

The fourth step is to check the installation of the device to ensure that the device is firmly fixed. the

Equivalently loaded according to the design load, when the test beam body produces a small displacement within the gauge length range, the left table frame 6 and the right table frame 8 move to both sides respectively, and drive the dial gauge probe 17 to extend outward , so that the reading of the dial gauge 5 changes. After the needle is stable, read the dial indicator and subtract the two indications to obtain the total displacement ΔL of the beam within the range of the gauge length L, which can be converted into the corresponding strain value. the

Claims (2)

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.

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