Concrete test block crack observation device

Abstract

The utility model provides a concrete test block crack observation device which comprises a freezing and thawing mechanism, a lifting mechanism and an observation mechanism, the freezing and thawing mechanism comprises a freezing box body, a hot melting box body, a heat insulation plate between the freezing box body and the hot melting box body, and box covers at the tops of the freezing box body and the hot melting box body; the lifting mechanism comprises a screw rod, a lifting plate is assembled on the screw rod, sliding rails are connected to the lifting plate, and a test block tray is assembled on one group of sliding rails in a sliding manner; the observation mechanism comprises a lifting rod, a guide rod and a sliding plate, a microscopic probe is installed on the sliding plate, and a display terminal is installed on the lifting rod. The lifting mechanism is arranged, the test block tray is driven by the lead screw to ascend, and the test block tray moves between the freezing box body and the hot melting box body through the sliding rail, so that the test block can be conveniently transferred in the freezing box body and the hot melting box body in the repeated freezing and thawing process of the concrete test block. Besides, by arranging the observation mechanism, the crack condition of the test block is observed in the transferring process, meanwhile, the microscopic probe is arranged on the sliding block, and the crack condition of the test block can be conveniently observed in batches through transverse movement of the sliding block.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete detection, in particular to a concrete test block crack observation device. Background Art

[0002] Concrete freeze-thaw refers to the process in which concrete is frozen and then thawed in a low-temperature environment. Concrete containing recycled crushed stone will shrink and deform during the freeze-thaw process. That is, when concrete is frozen, the water will expand, which will cause the volume of the concrete to increase, leading to cracking and damage to the concrete. When the heated ice melts, the water will re-enter the concrete, causing the volume of the concrete to decrease. This periodic volume change will have a negative impact on the performance of the concrete and cause cracking of the concrete specimens. In the experiment of preparing concrete with recycled crushed stone, it is necessary to study the amount of crushed stone to reduce cracks in the concrete and improve the quality of the concrete. This work requires a large number of tests.

[0003] In freeze-thaw experiments, freezing and thawing operations are performed in separate equipment. After each operation, the concrete specimens are inspected for cracks. The specimens must be removed and placed back into the equipment for freeze-thaw cycles. Consequently, during a single freeze-thaw test, the specimens must be repeatedly moved in and out of the equipment, which is not only cumbersome but also inconvenient for batch testing.

[0004] Therefore, in order to observe the crack changes of concrete specimens during repeated freezing and thawing, a concrete specimen crack observation device is needed. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a concrete test block crack observation device, which is convenient for transferring the concrete test blocks between a freezing box and a thermal melting box during repeated freezing and thawing, and for observing the crack conditions of the test blocks during the transfer process, and is also convenient for batch observation of the crack conditions of the test blocks.

[0006] The utility model provides a concrete test block crack observation device, comprising a freeze-thaw mechanism, a lifting mechanism and an observation mechanism, wherein:

[0007] The freeze-thaw mechanism comprises a freezing box and a heat-melting box, an insulation board is provided between the freezing box and the heat-melting box, and a box cover is provided on the top of the freezing box and the heat-melting box respectively;

[0008] The lifting mechanism includes two sets of screw rods vertically arranged in the freezing box and the heat-melting box, each screw rod is equipped with a lifting plate, the lifting plate is connected to the slide rail, and a set of slide rails can be slidably equipped with a test block tray;

[0009] The observation mechanism comprises two groups of lifting rods vertically arranged on both sides of the freezing box and the thawing box, a guide rod connected between each group of the lifting rods, a sliding plate slidably arranged on the two guide rods, a microscope probe installed on the sliding plate, and a lens of the microscope probe downwardly arranged, and a display terminal installed on the lifting rod on the same side of the freezing and thawing mechanism.

[0010] Preferably, a partition plate is horizontally arranged at the lower part of the freezing box and the thawing box, the upper side of the partition plate is a freezing chamber or a thawing chamber, the lower side of the partition plate is a power chamber, a freezing coil pipe is arranged in the freezing chamber, a heating coil pipe is arranged in the thawing chamber, and a power mechanism is arranged in the power chamber.

[0011] Preferably, the power mechanism comprises a motor, a driving wheel arranged at the power output end of the motor, and a transmission wheel arranged at the lower end of the screw rod, and the transmission wheel and the driving wheel are connected through a belt transmission.

[0012] Preferably, the lifting plate is L-shaped, the horizontal plate of the lifting plate is arranged with the screw rod, and the vertical plate of the lifting plate is connected with a sliding rail at the top.

[0013] Preferably, a limiting disc is arranged at the top of the screw rod.

[0014] Preferably, a group of guide grooves are arranged in parallel at the lower side of the test block tray, and the sliding rail is movably arranged in the guide grooves.

[0015] Preferably, a fixed sleeve ring is arranged on both sides of the freezing box and the thawing box, and the lifting rod is arranged in the fixed sleeve ring and fastened and connected through a limiting bolt.

[0016] Preferably, a group of guide holes are arranged in parallel on the sliding plate, and the guide rod is movably arranged in the guide holes.

[0017] Preferably, the box cover can be slidably opened on the freezing box and the thawing box.

[0018] The present invention operates as follows: To use the concrete test block crack observation device, a concrete test block is placed on a test block tray, which is then positioned on a slide rail within a freezer. The corresponding motor is turned forward, driving the screw, which in turn drives the lift plate downward, causing the test block tray to descend along the slide rail. The freezer lid is then closed to begin freezing. After freezing, the lid is opened, and the motor is turned reverse, causing the test block tray to ascend. The test block tray is then moved along the slide rail toward the side of the melt chamber, positioning the test block directly beneath a microscopic probe. The microscopic probe observes the cracks in the test block and transmits the information to a display terminal for real-time viewing. To facilitate clear observation, a light can be provided on the slider. After observing one test block, the slider can be moved laterally on the guide rods, moving the test block tray longitudinally on the slide rail to complete observation of the remaining test blocks. After observation, the test block tray is further pushed toward the melt chamber, positioning it on the slide rail within the melt chamber. The corresponding motor is then turned forward, causing the test block tray to descend into the melt chamber for melting. After the heat-melting process is complete, open the box lid and start the motor in reverse to raise the test block tray. Then, push the test block tray along the slide rail to the side of the freezing chamber so that the test block is directly under the microscope probe for the second observation. Repeat the above steps until the observation test is completed.

[0019] The beneficial effects of the present invention are as follows: The concrete test block crack observation device of the present invention is provided with a lifting mechanism, which uses a screw to drive the test block tray to rise, and uses a slide rail to move the test block tray between the freezing chamber and the thermal melt chamber, thereby facilitating the transfer of concrete test blocks between the freezing chamber and the thermal melt chamber during repeated freezing and thawing. In addition, by providing an observation mechanism, the crack condition of the test blocks can be observed during the transfer process, and the microprobe is placed on the slide, and the slide is moved horizontally to facilitate the observation of the crack condition of the test blocks in batches. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a freeze-thaw processing state diagram of the concrete specimen crack observation device of the utility model;

[0021] Figure 2 This is an observation state diagram of the concrete test block crack observation device of the utility model;

[0022] Figure 3 for Figure 2 A partial enlarged view of the

[0023] Figure 4 This is a schematic diagram of the internal structure of the concrete test block crack observation device of the utility model;

[0024] Figure 5 for Figure 2 Schematic diagram of the structure of the middle slide;

[0025] Figure 6 For Figure 2 The structure diagram of the pilot block tray.

[0026] In the figure: freeze-thaw mechanism 1, freezing box body 11, hot melting box body 12, heat insulation plate 13, box cover 14, partition plate 15; lifting mechanism 2, lead screw 21, lifting plate 22, slide rail 23, test block tray 24, limit disc 25, guide groove 26; observation mechanism 3, lifting rod 31, guide rod 32, sliding plate 33, microscopic probe 34, display terminal 35, fixing collar 36, limit bolt 37, guide hole 38, illuminating lamp 39; power mechanism 4, motor 41, driving wheel 42, transmission wheel 43, belt 44. DETAILED DESCRIPTION

[0027] In order to make the technical scheme of the utility model easier to understand, the technical scheme of the utility model is described clearly and completely in the form of specific embodiments in combination with the drawings.

[0028] Embodiment 1:

[0029] As Figures 1 to 6 shown, the concrete test block crack observation device of the embodiment comprises a freeze-thaw mechanism 1, a lifting mechanism 2 and an observation mechanism 3, wherein:

[0030] The freeze-thaw mechanism 1 comprises a freezing box body 11 and a hot melting box body 12, and a heat insulation plate 13 is arranged between the freezing box body 11 and the hot melting box body 12; the top of the freezing box body 11 and the top of the hot melting box body 12 are respectively provided with a box cover 14;

[0031] The lifting mechanism 2 comprises two groups of lead screws 21 vertically arranged in the freezing box body 11 and the hot melting box body 12; a lifting plate 22 is respectively arranged on each lead screw 21; the lifting plate 22 is connected with a slide rail 23; a test block tray 24 is slidably arranged on one group of slide rails 23;

[0032] The observation mechanism 3 comprises two groups of lifting rods 31 vertically arranged on the two sides of the freezing box body 11 and the hot melting box body 12; a guide rod 32 is connected between each group of lifting rods 31; a sliding plate 33 is slidably arranged on the two guide rods 32; a microscopic probe 34 is installed on the sliding plate 33; the lens of the microscopic probe 34 is installed downward; a display terminal 35 is installed on one group of lifting rods 31 on the same side of the freeze-thaw mechanism 1.

[0033] Embodiment 2:

[0034] As Figures 1 to 6 shown, the concrete test block crack observation device of the embodiment comprises a freeze-thaw mechanism 1, a lifting mechanism 2 and an observation mechanism 3, wherein:

[0035] The freeze-thaw mechanism 1 comprises a freezing box 11 and a thawing box 12, a heat insulation plate 13 is arranged between the freezing box 11 and the thawing box 12, and the top of the freezing box 11 and the thawing box 12 is respectively provided with a box cover 14; the box cover 14 can be slid open on the freezing box 11 and the thawing box 12; the lower part of the freezing box 11 and the thawing box 12 is horizontally provided with a partition plate 15, the upper side of the partition plate 15 is a thawing chamber or a freezing chamber, the lower side of the partition plate 15 is a power chamber, the freezing chamber is internally provided with a freezing coil pipe, the thawing chamber is internally provided with a heating coil pipe, and the power chamber is internally provided with a power mechanism 4.

[0036] The lifting mechanism 2 comprises two groups of lead screws 21 vertically arranged in the freezing box 11 and the thawing box 12, each of the lead screws 21 is respectively provided with a lifting plate 22, the lifting plate 22 is connected with a slide rail 23, and a test block tray 24 can be slidably arranged on one group of the slide rails 23; the lifting plate 22 is L-shaped, the horizontal plate of the lifting plate 22 is arranged with the lead screw 21, and the vertical plate of the lifting plate 22 is connected with the slide rail 23 at the top; the top of the lead screw 21 is provided with a limiting disc 25; the lower side of the test block tray 24 is parallelly provided with a group of guide grooves 26, and the slide rail 23 is movably arranged in the guide groove 26.

[0037] The observation mechanism 3 comprises two groups of lifting rods 31 vertically arranged on the two sides of the freezing box 11 and the thawing box 12, a guide rod 32 is connected between each group of the lifting rods 31, a sliding plate 33 is slidably arranged on the two guide rods 32, a microscope probe 34 is arranged on the sliding plate 33, the lens of the microscope probe 34 is downwardly arranged, and a display terminal 35 is arranged on the same side of one group of the lifting rods 31 of the freeze-thaw mechanism 1; a fixed sleeve ring 36 is arranged on the two sides of the freezing box 11 and the thawing box 12, the lifting rod 31 is arranged in the fixed sleeve ring 36 and is tightly connected through a limiting bolt 37; a group of guide holes 38 are parallelly arranged on the sliding plate 33, and the guide rod 32 is movably arranged in the guide hole 38.

[0038] The power mechanism 4 comprises a motor 41, a driving wheel 42 is arranged on the power output end of the motor 41, a transmission wheel 43 is arranged at the lower end of the lead screw 21, and the transmission wheel and the driving wheel 42 are drivingly connected through a belt 44.

[0039] It should be noted that the embodiments described herein are only part of the embodiments of the present application, rather than all the implementation manners of the present application, the embodiments are only exemplary, and the role is only to provide a more intuitive and clear way to understand the content of the present application, rather than a limitation on the technical solutions of the present application. Without departing from the concept of the present application, all other embodiments that can be thought of by those skilled in the art without creative labor and other simple replacements and various changes of the technical solutions of the present application all belong to the protection scope of the present application.

Claims

1. A concrete specimen crack observation device, characterized in that: It comprises a freeze-thaw mechanism (1), a lifting mechanism (2) and an observation mechanism (3), wherein: The freeze-thaw mechanism (1) comprises a freezing box (11) and a heat-melting box (12), a heat-insulating plate (13) is provided between the freezing box (11) and the heat-melting box (12), and a box cover (14) is provided on the top of each of the freezing box (11) and the heat-melting box (12); The lifting mechanism (2) comprises two sets of screw rods (21) vertically arranged in the freezing box (11) and the hot melt box (12), each screw rod (21) is respectively equipped with a lifting plate (22), the lifting plate (22) is connected to a slide rail (23), and a test block tray (24) can be slidably mounted on one set of slide rails (23); The observation mechanism (3) comprises two sets of lifting rods (31) vertically mounted on both sides of the freezing box (11) and the heat-melting box (12), each set of lifting rods (31) is connected to a guide rod (32), a slide plate (33) is slidably mounted on the two guide rods (32), a microscopic probe (34) is mounted on the slide plate (33), and the lens of the microscopic probe (34) is mounted downwardly, and a display terminal (35) is mounted on a set of lifting rods (31) on the same side of the freeze-thaw mechanism (1).

2. The concrete test block crack observation device according to claim 1, characterized in that: A partition plate (15) is horizontally arranged at the lower part of the freezing box body (11) and the heat melting box body (12); the upper side of the partition plate (15) is a heat melting chamber or a freezing chamber; the lower side of the partition plate (15) is a power chamber; a freezing coil is arranged in the freezing chamber, a heating coil is arranged in the heat melting chamber, and a power mechanism (4) is arranged in the power chamber.

3. The concrete test block crack observation device according to claim 2, characterized in that: The power mechanism (4) includes a motor (41), a driving wheel (42) is mounted on the power output end of the motor (41), a transmission wheel (43) is mounted on the lower end of the screw rod (21), and the conventional wheel and the driving wheel (42) are connected by a belt (44).

4. The concrete test block crack observation device according to claim 1, characterized in that: The lifting plate (22) is L-shaped, its horizontal plate is matched with the screw rod (21), and the top of its vertical plate is connected to the slide rail (23).

5. The concrete test block crack observation device according to claim 1, characterized in that: A limiting plate (25) is provided on the top of the screw rod (21).

6. The concrete test block crack observation device according to claim 1, characterized in that: A group of guide grooves (26) are provided in parallel on the lower side of the test block tray (24), and the slide rails (23) are movably mounted in the guide grooves (26).

7. The concrete test block crack observation device according to claim 1, characterized in that: Fixed collars (36) are installed on both sides of the freezing box (11) and the hot melt box (12), and the lifting rod (31) is fitted in the fixed collar (36) and is fastened by a limit bolt (37).

8. The concrete test block crack observation device according to claim 1, characterized in that: A group of guide holes (38) are arranged in parallel on the slide plate (33), and the guide rods (32) are movably mounted in the guide holes (38).

9. The concrete test block crack observation device according to claim 1, characterized in that: The box cover (14) can be slid open on the freezing box body (11) and the hot melt box body (12).

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