Device for detecting expansion rate of concrete expansive agent

Abstract

The utility model discloses a device for detecting the expansion rate of a concrete expansive agent, which comprises a machine body, an operating room is arranged in the machine body, a supporting table is arranged in the operating room, a moving mechanism is arranged on the supporting table, a placing plate for placing a test block is arranged on the moving mechanism, and a clamping mechanism is arranged on the placing plate. First laser range finders are arranged on the two inner side walls of the operation chamber, the first laser range finders on the two side walls emit laser towards the direction where the containing plate is located, the laser emitting centers are located on the same straight line, a second laser range finder is arranged on the top wall in the operation chamber, and the second laser range finder emits laser downwards. According to the utility model, the laser range finder is used for detecting the test block, so that a worker does not need to carry out repeated tests for many times, the detection steps are relatively simple, and the detection result is more accurate. Meanwhile, the test block is not influenced by external force, and the measured shrinkage or swelling amount is small in error.

Description

Technical Field

[0001] This utility model relates to the field of building engineering testing technology, and in particular to a device for detecting the expansion rate of concrete expansion agents. Background Technology

[0002] Ordinary concrete often leaks due to shrinkage cracking, reducing its functionality and durability. Adding 8%-12% expansion agent to cement can create shrinkage-compensating concrete, significantly improving the crack resistance and waterproofing of concrete structures. A concrete expansion rate testing device is a specialized instrument used to measure the shape changes of concrete specimens during the hardening process. During the initial setting or hardening process, concrete materials undergo shape changes due to external environmental factors and the material's own properties. These shape changes severely affect the stability, durability, and load-bearing capacity of concrete structures, thus threatening engineering safety.

[0003] Currently, commonly used concrete expansion agent expansion rate testing devices mainly consist of a base, a positioning column fixed to the base, an adjustable column, a standard rod, and a dial indicator. During testing, the dial indicator must first be zeroed using the standard rod. Then, the embedded probe at one end of the concrete specimen is placed against the groove of the positioning column, and the embedded probe at the other end of the specimen is placed against the dial indicator probe. The change in the dial indicator reading then reflects the change in the length of the concrete specimen. Using this device to determine concrete expansion and shrinkage requires multiple repeated tests, with the average value taken as the final result, making the testing process relatively cumbersome. Utility Model Content

[0004] In view of the above shortcomings, the purpose of this utility model is to provide a device for detecting the expansion rate of concrete expansion agent.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A device for detecting the expansion rate of concrete expansion agent includes a body, an operating chamber inside the body, a support platform in the operating chamber, a moving mechanism on the support platform, a placement plate for placing test blocks on the moving mechanism, and the placement plate can be driven to move. First laser rangefinders are installed on the two inner side walls of the operating chamber, emitting lasers towards the placement plate with the laser emission centers aligned on the same straight line. A second laser rangefinder is installed on the top wall of the operating chamber, emitting lasers downwards.

[0007] Based on the above solution, the moving mechanism further includes a housing, a motor, a lead screw, a slide rail, and a slider. The housing is mounted on a support platform, the motor is mounted at one end of the housing, the lead screw is mounted inside the housing and connected to the output shaft of the motor, the slide rail is mounted inside the housing and located on both sides of the lead screw, the slider has a screw hole adapted to the lead screw, and the slider is movably connected to the lead screw with both ends located on the slide rail.

[0008] Furthermore, based on the above solution, the moving mechanism also includes a cover, which is mounted on the housing and forms a gap between the cover and the housing on both sides that can be moved by sliders.

[0009] Based on the above solution, the slider extends outward through gaps on both sides, and support bars are provided on both sides of the slider. The height of the support bars is higher than that of the cover, and the placement plate is installed on the support bars.

[0010] Furthermore, based on the above scheme, the placement plate is provided with multiple baffles, which divide the placement plate into multiple placement positions, and the number of the first laser rangefinder and the second laser rangefinder is also multiple, corresponding to the number of placement positions.

[0011] Furthermore, based on the above solution, the placement plate is provided with a notch.

[0012] Furthermore, based on the above scheme, the machine body is equipped with a main control board and a display, and the main control board is electrically connected to the first laser rangefinder, the second laser rangefinder, the motor, and the display.

[0013] Furthermore, based on the above solution, a pressure switch is provided on the inner wall of the operating room, the pressure switch is electrically connected to the main control board, and a trigger rod is provided on the placement plate, with the center of the trigger rod and the center of the pressure switch on the same straight line.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention uses a laser rangefinder to inspect the test block, eliminating the need for repeated testing by personnel. The inspection process is simpler, and the results are more accurate. Furthermore, since there is no external force affecting the test block, the measured shrinkage or expansion has minimal error. Attached Figure Description

[0016] Figure 1 This is a three-dimensional diagram of a device used to detect the expansion rate of concrete expansion agents.

[0017] Figure 2 This is a cross-sectional view of a device used to detect the expansion rate of concrete expansion agents;

[0018] Figure 3 It is a 3D diagram of the moving mechanism;

[0019] Figure 4 This is a diagram of the internal structure of the moving mechanism;

[0020] Figure 5 It is a 3D view of the placement board;

[0021] Figure 6 This is a diagram of the testing steps.

[0022] Figure label:

[0023] 1. Main body; 101. Control room; 102. Support platform; 103. Display screen;

[0024] 2. Moving mechanism, 201. Housing, 202. Motor, 203. Lead screw, 204. Slide rail, 205. Slider, 206. Cover;

[0025] 3. Placement plate, 301. Baffle, 302. Notch, 303. Trigger lever;

[0026] 4. First laser rangefinder;

[0027] 5. Second laser rangefinder;

[0028] 6. Support strip;

[0029] 7. Pressure switch;

[0030] 8. Test block. Detailed Implementation

[0031] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses consistent with some aspects of this application as detailed in the appended claims.

[0032] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this utility model pertains. The words “a” or “one” and similar terms used in this application specification and claims do not indicate a limitation of quantity, but rather indicate the presence of at least one. “A plurality” includes two, equivalent to at least two. The words “comprising” or “including” and similar terms mean that the element or object preceding “comprising” or “including” covers the element or object listed following “comprising” or “including” and its equivalents, and does not exclude other elements or objects. The words “connected” or “linked” and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0033] Please refer to the following for details. Figure 1-5 A device for detecting the expansion rate of concrete expansion agent includes a body 1, an operating chamber 101 inside the body 1, a support platform 102 inside the operating chamber 101, a moving mechanism 2 on the support platform 102, a placement plate 3 for placing a test block 8 on the moving mechanism 2, the placement plate 3 can be moved under the action of the moving mechanism 2, a first laser rangefinder 4 is provided on the left and right inner side walls of the operating chamber 101, the first laser rangefinder 4 on the two side walls emits lasers in the direction of the placement plate 3, and the laser emission centers are on the same straight line, a second laser rangefinder 5 is provided on the top wall inside the operating chamber 101, the second laser rangefinder 5 emits lasers downward.

[0034] Based on the above-mentioned technical methods, a laser rangefinder is used to test test block 8, eliminating the need for repeated testing by staff. The testing procedure is simpler, and the results are more accurate. Furthermore, since there is no external force affecting test block 8, the measured shrinkage or expansion amount has minimal error.

[0035] In this embodiment, the moving mechanism 2 includes a housing 201, a motor 202, a lead screw 203, a slide rail 204, and a slider 205. The housing 201 is mounted on a support platform 102. The motor 202 is mounted at one end of the housing 201. The lead screw 203 is mounted inside the housing 201 and connected to the output shaft of the motor 202. The slide rail 204 is mounted inside the housing 201 and located on both sides of the lead screw 203. The slider 205 has screw holes adapted to the lead screw 203. The slider 205 is movably connected to the lead screw 203, and its two ends are located on the slide rail 204. When the motor 202 is started, the output shaft of the motor 202 rotates, thereby driving the lead screw 203 to rotate, which allows the slider 205 to move laterally.

[0036] In this embodiment, the moving mechanism 2 further includes a cover 206, which is mounted on the housing 201 and forms gaps between its two sides and the housing 201 for movement by the slider 205. The cover 206 can prevent external dust, metal shavings, oil stains and other foreign objects from entering the lead screw 203 and the guide rail, avoiding the accumulation of particles that could lead to increased friction or jamming. At the same time, the design of the gaps does not affect the movement of the slider 205.

[0037] In this embodiment, the slider 205 extends outward through gaps on both sides, and support bars 6 are provided on both sides of the slider 205. The height of the support bars 6 is higher than that of the cover 206. The placement plate 3 is installed on the support bars 6 to prevent the cover 206 from interfering with the movement of the placement plate 3.

[0038] In this embodiment, the placement plate 3 is provided with three baffles 301, which are respectively located on both sides and in the middle of the placement plate 3. The baffles 301 divide the placement plate 3 into two placement positions. The number of the first laser rangefinder 4 and the second laser rangefinder 5 is also two, corresponding to the number of placement positions. In this way, two test blocks 8 can be tested simultaneously, improving the testing efficiency.

[0039] In this embodiment, the placement plate 3 has notches 302 at both ends. The design of the notches 302 makes it convenient for users to remove the test block 8 from the placement plate 3.

[0040] In this embodiment, the main control board (located inside the main body 1 and not shown) and the display 103 are provided on the main body 1. The main control board is electrically connected to the first laser rangefinder 4, the second laser rangefinder 5, the motor 202 and the display 103. The main control board integrates a processor. The first laser rangefinder 4 and the second laser rangefinder 5 convert and analyze the collected data and display it on the display 103 for easy observation by the user.

[0041] In this embodiment, a pressure switch 7 is provided on the inner wall of the operating chamber 101. The pressure switch 7 is electrically connected to the main control board. A trigger rod 303 is provided on the placement plate 3, and the center of the trigger rod 303 and the pressure switch 7 are on the same straight line. Thus, when the placement plate 3 moves to the detection position (when the test block 8 is aligned with the first laser rangefinder 4 and the second laser rangefinder 5), the trigger rod 303 will touch the pressure switch 7. The pressure switch 7 transmits a signal to control the motor 202 to stop working, and the first laser rangefinder 4 and the second laser rangefinder 5 work to detect the test block 8.

[0042] This utility model relates to a device for detecting the expansion rate of concrete expansion agents. Its working principle is explained in conjunction with the accompanying drawings:

[0043] Initially, the placement plate 3 is located on the outermost side of the machine body 1. The user can place the test block 8 on the placement plate 3 for the first test. The motor 202 is started, and its output shaft rotates, driving the lead screw 203 to rotate, causing the slider 205 to move inwards into the machine body 1. When the trigger rod 303 touches the pressure switch 7, the test block 8 is aligned with the first laser rangefinder 4 and the second laser rangefinder 5. At this point, the motor 202 stops working, the placement plate 3 no longer moves, and simultaneously the first laser rangefinder 4 and the second laser rangefinder 5 emit lasers. The first laser rangefinder 4 on both sides emits lasers, obtaining data L1 and L2 respectively. For L2, the first laser rangefinder 4 and the second laser rangefinder 5 emit lasers to obtain data L3; start motor 202 to drive test block 8 back to the outermost side of the machine body 1, so that the user can remove test block 8 and perform maintenance on test block 8. After maintenance for a period of time, a second test is performed; repeat the above test steps, the first laser rangefinder 4 on both sides emits lasers to obtain data L4 and L5 respectively, the first laser rangefinder 4 and the second laser rangefinder 5 emit lasers to obtain data L6; calculate the difference between (L1+L2) and (L4+L5), L3 and L6, determine the expansion rate, and the final result is displayed on display 103.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the expansion rate of concrete expansion agents, characterized in that, The device includes a main body, an operating room inside the main body, a support platform inside the operating room, a moving mechanism on the support platform, a placement plate for placing test blocks on the moving mechanism, and the ability to drive the placement plate to move. First laser rangefinders are installed on the two inner side walls of the operating room, and the first laser rangefinders on the two side walls emit lasers in the direction of the placement plate, with the laser emission centers on the same straight line. A second laser rangefinder is installed on the top wall inside the operating room, and the second laser rangefinder emits lasers downwards.

2. The device for detecting the expansion rate of concrete expansion agent according to claim 1, characterized in that, The moving mechanism includes a housing, a motor, a lead screw, a slide rail, and a slider. The housing is mounted on a support platform, the motor is mounted at one end of the housing, the lead screw is mounted inside the housing and connected to the output shaft of the motor, the slide rail is mounted inside the housing and located on both sides of the lead screw, and the slider has a screw hole adapted to the lead screw. The slider is movably connected to the lead screw and its two ends are located on the slide rail.

3. The device for detecting the expansion rate of concrete expansion agent according to claim 2, characterized in that, The moving mechanism also includes a cover, which is mounted on the housing and has gaps between its sides and the housing that can be moved by sliders.

4. The device for detecting the expansion rate of concrete expansion agent according to claim 3, characterized in that, The slider extends outward through gaps on both sides, and support bars are provided on both sides of the slider. The height of the support bars is higher than that of the cover, and the placement plate is installed on the support bars.

5. The device for detecting the expansion rate of concrete expansion agent according to claim 1 or 3, characterized in that, The placement plate is provided with multiple baffles, which divide the placement plate into multiple placement positions. The number of the first laser rangefinder and the second laser rangefinder is also multiple, corresponding to the number of placement positions.

6. The device for detecting the expansion rate of concrete expansion agent according to claim 5, characterized in that, The placement plate has a notch.

7. The device for detecting the expansion rate of concrete expansion agent according to claim 1, characterized in that, The machine body is equipped with a main control board and a display. The main control board is electrically connected to the first laser rangefinder, the second laser rangefinder, the motor, and the display.

8. The device for detecting the expansion rate of concrete expansion agent according to claim 7, characterized in that, A pressure switch is installed on the inner wall of the operating room. The pressure switch is electrically connected to the main control board. A trigger rod is installed on the placement plate. The center of the trigger rod and the center of the pressure switch are on the same straight line.

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