CN-224231776-U - Device for detecting expansion rate of concrete expansion agent

CN224231776UCN 224231776 UCN224231776 UCN 224231776UCN-224231776-U

Abstract

The utility model discloses a device for detecting the expansion rate of a concrete expanding agent, which comprises a machine body, wherein an operation chamber is arranged in the machine body, a supporting table is arranged in the operation chamber, a moving mechanism is arranged on the supporting table, a placing plate for placing a test block is arranged on the moving mechanism, first laser rangefinders are arranged on two inner side walls of the operation chamber, the first laser rangefinders on the two side walls emit laser to the direction prescribed by the placing plate, the laser emission centers are on the same straight line, a second laser rangefinder is arranged on the top wall in the operation chamber, and the second laser rangefinder emits laser downwards. The utility model uses the laser range finder to detect the test block, does not need repeated test of staff for many times, has simpler detection steps and more accurate detection result. Meanwhile, the test block is not influenced by external force, and the measured shrinkage or expansion error is small.

Inventors

ZHOU JIANCHANG
JIANG YONGJIAN
HU MENGYING
JI JIACHEN
LIN SHUIGEN

Assignees

杭州市建筑工程质量检测中心有限公司

Dates

Publication Date: 20260512
Application Date: 20250626

Claims (8)

1. The utility model provides a be used for detecting concrete expansion agent expansion rate device, its characterized in that, includes the organism, be equipped with the control room in the organism, be equipped with the brace table in the control room, be equipped with moving mechanism on the brace table, be equipped with on the moving mechanism and be used for placing the test block place the board and can drive and place the board and remove, be equipped with first laser rangefinder on two inside walls of control room, first laser rangefinder on both sides wall is in same straight line to placing the board prescription and to transmitting laser, and the laser emission center, be equipped with the second laser rangefinder on the control room roof, the second laser rangefinder emits laser downwards.
2. The device for detecting the expansion rate of the concrete expansion agent according to claim 1, wherein the moving mechanism comprises a shell, a motor, a screw rod, sliding rails and a sliding block, the shell is mounted on the supporting table, the motor is mounted at one end of the shell, the screw rod is mounted inside the shell and is connected with an output shaft of the motor, the sliding rail is mounted inside the shell and is positioned at two sides of the screw rod, screw holes matched with the screw rod are formed in the sliding block, and the sliding block is movably connected to the screw rod and two ends of the sliding block are positioned on the sliding rails.
3. The device for detecting an expansion rate of a concrete expansion agent according to claim 2, wherein the moving mechanism further comprises a cover body mounted on the housing with a gap formed between both sides and the housing to be movable with the slider.
4. The device for detecting the expansion rate of concrete expansion agent according to claim 3, wherein the two sides of the sliding block extend outwards through the gap, the two sides of the sliding block are provided with supporting bars, the height of the supporting bars is higher than that of the cover body, and the placing plate is installed on the supporting bars.
5. A device for detecting the expansion rate of a concrete expansion agent according to claim 1 or 3, wherein a plurality of baffles are arranged on the placing plate, the baffles divide the placing plate into a plurality of placing positions, and the number of the first laser distance measuring instrument and the number of the second laser distance measuring instrument are also a plurality of numbers corresponding to the number of the placing positions.
6. The device for detecting the expansion rate of concrete expansion agent according to claim 5, wherein the placement plate is provided with a notch.
7. The device for detecting the expansion rate of the concrete expansion agent according to claim 1, wherein a main control board and a display are arranged on the machine body, and the main control board is electrically connected with the first laser range finder, the second laser range finder, the motor and the display.
8. The device for detecting the expansion rate of the concrete expansion agent according to claim 7, wherein a pressure switch is arranged on the inner wall of the operation chamber, the pressure switch is electrically connected with the main control board, a trigger rod is arranged on the placement board, and the trigger rod and the center of the pressure switch are in the same straight line.

Description

Device for detecting expansion rate of concrete expansion agent Technical Field The utility model relates to the technical field of building engineering detection, in particular to a device for detecting the expansion rate of a concrete expansion agent. Background Common concrete tends to leak due to shrinkage cracking, reducing its service function and durability. 8% -12% of expansion agent is doped in the cement, and the cement can be mixed to prepare the shrinkage-compensating concrete, so that the crack resistance and water resistance of the concrete structure are greatly improved. The concrete expansion rate detection device is a special device for measuring the appearance change of a concrete test piece in the hardening process. The concrete material is affected by the external environment and the characteristics of the material itself in the initial stage of coagulation or in the hardening process, and the appearance of the concrete material is changed. The shape change of the concrete material can seriously affect the stability, durability and bearing capacity of the concrete structure, thereby threatening engineering safety. At present, a common concrete expanding agent expansion rate detection device mainly comprises a base, a positioning upright post fixed on the base, an adjustable upright post, a standard rod and a dial indicator. When testing, the standard rod is used for carrying out dial indicator zero setting, then the embedded part measuring head at one end of the concrete test piece is abutted against the groove of the positioning upright post, and the embedded part measuring head at the other end of the test piece is abutted against the dial indicator measuring head. And then the length change of the concrete test piece is reflected by the reading change of the dial indicator. When the device is used for measuring the expansion and contraction of concrete, repeated tests are needed to be carried out by staff for many times, an average value is taken as a final test result, and the detection steps are complicated. Disclosure of utility model In view of the above-described drawbacks, an object of the present utility model is to provide an apparatus for detecting an expansion rate of a concrete expansion agent. In order to achieve the above purpose, the technical scheme of the utility model is as follows: the utility model provides a be used for detecting concrete expansion agent expansion rate device, includes the organism, be equipped with the control room in the organism, be equipped with the brace table in the control room, be equipped with moving mechanism on the brace table, be equipped with on the moving mechanism and be used for placing the test block place the board and can drive and place the board removal, be equipped with first laser rangefinder on two inside walls of control room, first laser rangefinder on the both sides wall is to placing the board prescription and to launch laser, and the laser emission center is in on same straight line, be equipped with the second laser rangefinder on the control room roof, the downward laser of launching of second laser rangefinder. On the basis of the scheme, the moving mechanism comprises a shell, a motor, a screw rod, sliding rails and sliding blocks, wherein the shell is arranged on a supporting table, the motor is arranged at one end of the shell, the screw rod is arranged inside the shell and is connected with an output shaft of the motor, the sliding rails are arranged inside the shell and are positioned on two sides of the screw rod, screw holes matched with the screw rod are formed in the sliding blocks, and the sliding blocks are movably connected onto the screw rod and are positioned on the sliding rails at two ends. On the basis of the scheme, the moving mechanism further comprises a cover body, wherein the cover body is arranged on the shell, and a gap for sliding blocks to move is formed between the two sides of the cover body and the shell. On the basis of the scheme, the two sides of the sliding block extend outwards through the gaps, supporting bars are arranged on the two sides of the sliding block, the height of each supporting bar is higher than that of the cover body, and the placing plate is arranged on each supporting bar. On the basis of the scheme, the placing plate is further provided with a plurality of baffles, the baffles divide the placing plate into a plurality of placing positions, and the number of the first laser range finders and the number of the second laser range finders are also a plurality of numbers corresponding to the number of the placing bits. On the basis of the scheme, a notch is further formed in the placing plate. On the basis of the scheme, a main control board and a display are arranged on the machine body, and the main control board is electrically connected with the first laser range finder, the second laser range finder, the motor and the display. On the basis of the scheme, a pressure