Concrete shrinkage test device

Abstract

The utility model discloses a concrete shrinkage test device and belongs to the technical field of concrete shrinkage tests. The stirring device comprises a bottom plate, the top of the bottom plate is connected with a first supporting frame, the top of the first supporting frame is connected with a second supporting frame, and the interior of the second supporting frame is connected with a stirring barrel. The special stirring structure design is adopted, the first motor drives the stirring rod to primarily stir materials, and meanwhile, the second motor drives the gear and the gear ring to enable the scraper frame to rotate reversely, so that the materials are secondarily stirred, adhered objects on the inner wall of the stirring barrel can be scraped, and the stirring efficiency is improved. According to the bidirectional stirring mode, the material stirring uniformity is greatly improved, it is ensured that the prepared concrete test slurry is qualified in quality, the accuracy of test data is effectively improved, and compared with a traditional device with a single stirring mode, the use effect is remarkably optimized.

Description

Technical Field

[0001] This utility model belongs to the field of concrete shrinkage testing technology, specifically a concrete shrinkage testing device. Background Technology

[0002] Concrete is widely used in construction and other industries. It shrinks under changing natural conditions, which can lead to wall cracking and severely affect concrete durability evaluation indicators. Existing concrete shrinkage performance testing devices have several problems. On the one hand, most devices use a single mixing method for preparing concrete slurry, failing to achieve uniform mixing and easily resulting in substandard slurry preparation, thus affecting the accuracy of test data. On the other hand, the concrete inside the test container easily hardens after use. Failure to replace the container will affect subsequent tests; however, existing test containers are mostly fixed, with complex disassembly processes and extremely inconvenient use. Utility Model Content

[0003] To address the problems mentioned in the background art, the purpose of this utility model is to provide a concrete shrinkage testing device that is easy to use and has good performance.

[0004] This utility model provides the following technical solution: a concrete shrinkage testing device, including a base plate, a first support frame fixedly connected to the top of the base plate, a second support frame fixedly connected to the top of the first support frame, a mixing cylinder fixedly connected inside the second support frame, a first motor fixedly connected to the top of the second support frame via a bracket, a mixing rod fixedly connected to the output end of the first motor, a ring fixedly connected to the top of the second support frame, an annular groove provided on the top of the ring, a movable column slidably connected inside the annular groove, a toothed ring fixedly connected to the top of the movable column, the toothed ring being rotatably connected to the mixing cylinder, a second motor fixedly connected to the top of the second support frame, a gear fixedly connected to the output end of the second motor, the gear meshing with the toothed ring, and a scraper frame fixedly connected to the surface of the toothed ring. The scraper frame is fitted against the inner wall of the mixing drum. The bottom of the mixing drum is connected to a delivery pump. Limit grooves are provided on both sides of the bottom of the inner wall of the first support frame, and limit strips are slidably connected inside the limit grooves. A carrying container is fixedly connected to the top of the limit strips. The bottom of the carrying container is fitted against the bottom of the inner wall of the first support frame. Movable partitions are slidably connected to both sides inside the carrying container. Fixed columns are fixedly connected to the surface of the movable partitions. The fixed columns are slidably connected to the carrying container. Sliding grooves are provided on both sides of the top of the bottom plate, and displacement detection devices are slidably connected inside the sliding grooves. A groove is provided on the side of the fixed column away from the movable partition. The probe rod of the displacement detection device is inserted into the groove. A bolt is threaded inside the fixed column. A slot is provided on the surface of the probe rod of the displacement detection device. The bolt is inserted into the slot.

[0005] The beneficial effects of this utility model are as follows:

[0006] 1. This utility model adopts a unique stirring structure design. The first motor drives the stirring rod to perform initial stirring of the material, while the second motor drives the gear and gear ring to make the scraper frame rotate in the opposite direction. This not only performs secondary stirring of the material, but also scrapes off the adhering substances on the inner wall of the stirring drum. This bidirectional stirring method greatly improves the uniformity of material stirring, ensures that the quality of the prepared concrete test slurry is qualified, and effectively improves the accuracy of test data. Compared with the traditional single stirring method device, the effect of use is significantly optimized.

[0007] 2. This utility model, through the arrangement of a drive box, a positive and negative threaded rod, a connecting column and a third motor, the rotation of the third motor drives the positive and negative threaded rod to rotate, thereby causing the connecting columns on both sides to move closer or further away from each other, and thus causing the displacement detection devices on both sides to move closer or further away from each other. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model.

[0009] Figure 2 This is a front sectional view of the stirring cylinder and toothed ring structure of this utility model.

[0010] Figure 3 This is a schematic diagram of the movable partition structure of this utility model.

[0011] Figure 4 This utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0012] Figure 5 This utility model Figure 1 Enlarged schematic diagram of the structure at point B.

[0013] Figure 6 This utility model Figure 1 Enlarged schematic diagram of the structure at point C. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0015] like Figures 1 to 6As shown, the concrete shrinkage testing device of this embodiment includes a base plate 1, a first support frame 2 fixedly connected to the top of the base plate 1, a second support frame 3 fixedly connected to the top of the first support frame 2, a mixing drum 4 fixedly connected inside the second support frame 3, a first motor 5 fixedly connected to the top of the second support frame 3 via a bracket, a mixing rod 6 fixedly connected to the output end of the first motor 5, a ring 7 fixedly connected to the top of the second support frame 3, an annular groove provided on the top of the ring 7, and a movable column 8 slidably connected inside the annular groove, a toothed ring 9 fixedly connected to the top of the movable column 8, the toothed ring 9 rotatably connected to the mixing drum 4, a second motor 12 fixedly connected to the top of the second support frame 3, a gear 13 fixedly connected to the output end of the second motor 12, the gear 13 meshing with the toothed ring 9, a scraper frame 10 fixedly connected to the surface of the toothed ring 9, and the scraper frame 10 and the inner surface of the mixing drum 4... The bottom of the mixing drum 4 is connected to the conveying pump 11. The bottom of the inner wall of the first support frame 2 is provided with limit grooves on both sides, and the limit grooves are slidably connected with limit strips 22. The top of the limit strips 22 is fixedly connected to the carrying container 19. The bottom of the carrying container 19 is attached to the bottom of the inner wall of the first support frame 2. The inside of the carrying container 19 is slidably connected with movable partitions 20 on both sides. The surface of the movable partitions 20 is fixedly connected with fixed columns 21. The fixed columns 21 are slidably connected to the carrying container 19. The top of the bottom plate 1 is provided with sliding grooves on both sides, and the sliding grooves are slidably connected with displacement detection devices 18. The side of the fixed column 21 away from the movable partitions 20 is provided with a groove. The probe of the displacement detection device 18 is inserted into the groove. The inside of the fixed column 21 is threaded with bolts 27. The surface of the probe of the displacement detection device 18 is provided with a slot. The bolts 27 are inserted into the slot.

[0016] refer to Figure 1 A drive box 14 is fixedly connected to the top of the base plate 1. A threaded rod 15 with positive and negative threads is rotatably connected inside the drive box 14. Connecting columns 16 are slidably connected to both sides inside the drive box 14. The connecting columns 16 are fixedly connected to the displacement detection device 18. The threaded rod 15 with positive and negative threads is threadedly connected to the connecting column 16. A third motor 17 is fixedly connected to the right side of the drive box 14. The output end of the third motor 17 is fixedly connected to the threaded rod 15 with positive and negative threads.

[0017] In this embodiment, the drive box 14, the threaded rods 15, the connecting posts 16 and the third motor 17 are arranged so that the rotation of the third motor 17 drives the threaded rods 15 to rotate, thereby causing the connecting posts 16 on both sides to move closer or further away from each other, and thus causing the displacement detection devices 18 on both sides to move closer or further away from each other.

[0018] refer to Figure 5Square tubes 23 are fixedly connected to the front and rear sides of both sides of the container 19. Sliding grooves are provided on both sides of the top of the bottom plate 1, and locking frames 24 are slidably connected inside the sliding grooves. The locking frames 24 are inserted into the square tubes 23. A compression spring is fixedly connected to the side of the locking frame 24 away from the movable partition 20. The end of the compression spring away from the locking frame 24 is fixedly connected to the inner wall of the sliding groove. A handle is fixedly connected to the side of the locking frame 24 away from the movable partition 20.

[0019] In this embodiment, the square tube 23, sliding groove, locking frame 24, and compression spring are arranged so that the compression spring always applies a pushing force to the locking frame 24 toward the movable partition 20. When the operator installs the carrier container 19, the limiting strip 22 slides into the limiting groove. When the square tube 23 is aligned with the locking frame 24, the operator releases the locking frame 24. Under the action of the compression spring, the locking frame 24 moves toward one side of the carrier container 19 until the locking frame 24 is inserted into the square tube 23, thereby preventing the carrier container 19 from moving back and forth and locking the position of the carrier container 19, which makes it easier for the operator to assemble and disassemble the carrier container 19.

[0020] refer to Figure 1 The top of the container 19 is fixedly connected to a sealing plate 26 by screws, and handles are fixedly connected to both sides of the top of the sealing plate 26.

[0021] In this embodiment, the top of the carrying container 19 can be sealed by the sealing plate 26 and the handle.

[0022] refer to Figure 1 A protective frame 25 is fixedly connected to the top of the first support frame 2. There are several protective frames 25, which are evenly distributed on the top of the first support frame 2.

[0023] In this embodiment, the protective frame 25 can, to a certain extent, prevent the operator from accidentally touching the second motor 12 or gear 13 and causing injury to the operator.

[0024] refer to Figure 1 The drive box 14 has a bearing fixedly connected inside, and the outer ring of the bearing is fixedly connected to the drive box 14, while the inner ring of the bearing is fixedly connected to the threaded rod 15.

[0025] In this embodiment, the bearing configuration reduces the friction between the drive box 14 and the threaded rod 15, thereby facilitating the rotation of the threaded rod 15.

[0026] This invention places materials into a mixing drum 4, and then the first motor 5 rotates to drive the stirring rod 6 to rotate, thereby performing the first stage of stirring on the materials in the mixing drum 4. The operator rotates the second motor 12 to drive the gear 13 to rotate, which in turn drives the gear ring 9 to rotate, which in turn drives the scraper frame 10 to rotate. The scraper frame 10 can stir the materials in the mixing drum 4 on the one hand, and scrape off the materials adhering to the inner wall of the mixing drum 4 on the other hand, thereby further improving the stirring effect of the device on the materials. During operation, the rotation direction of the scraper frame 10 is opposite to the rotation direction of the stirring rod 6, thereby improving the stirring effect of the device and ensuring that the device can prepare qualified concrete test slurry.

[0027] The operator uses the delivery pump 11, the bottom of which can be connected to a flow guide hose (not shown), to deliver concrete slurry to the space between two movable partitions 20 inside the bearing container 19. Then, a sealing plate 26 is installed, and the movable partitions 20 are fitted against the two sides of the inner wall of the bearing container 19. The operator then adjusts the displacement detection devices 18 on both sides to move closer to each other until the probe of the displacement detection device is inserted into the fixed column 21 and connected and fixed by bolts 27. At this time, the third motor 17 stops rotating to ensure that the position of the displacement detection devices 18 on both sides does not move.

[0028] When concrete shrinks, the movable partition 20 attached to the concrete will displace to a certain extent. The movable partition 20 synchronously drives the displacement of the fixed column 21 and the probe at the top of the displacement detection device 18. The displacement data is displayed by the displacement detection device 18, and then the concrete shrinkage test is carried out. The above-mentioned bearing container 19, movable partition 20, displacement detection device and probe are similar in principle to the bearing container, partition, displacement detection device and probe mentioned in the utility model patent disclosed in CN218674996U, and achieve the same effect. This application will not elaborate further.

Claims

1. A concrete shrinkage testing device comprising a base plate (1), characterised in that: The top of the base plate (1) is fixedly connected to a first support frame (2), the top of the first support frame (2) is fixedly connected to a second support frame (3), the inside of the second support frame (3) is fixedly connected to a stirring cylinder (4), the top of the second support frame (3) is fixedly connected to a first motor (5) via a bracket, the output end of the first motor (5) is fixedly connected to a stirring rod (6), the top of the second support frame (3) is fixedly connected to a ring (7), the top of the ring (7) is provided with an annular groove, and a movable column (8) is slidably connected inside the annular groove, the top of the movable column (8) is fixedly connected to a toothed ring (9), the toothed ring (9) is rotatably connected to the stirring cylinder (4), the top of the second support frame (3) is fixedly connected to a second motor (12), the output end of the second motor (12) is fixedly connected to a gear (13), the gear (13) meshes with the toothed ring (9), the surface of the toothed ring (9) is fixedly connected to a scraper frame (10), the scraper frame (10) is in contact with the inner wall of the stirring cylinder (4), and so on. The bottom of the stirring drum (4) is connected to a delivery pump (11). Limiting grooves are provided on both sides of the bottom of the inner wall of the first support frame (2), and limiting strips (22) are slidably connected inside the limiting grooves. A carrying container (19) is fixedly connected to the top of the limiting strips (22). The bottom of the carrying container (19) is in contact with the bottom of the inner wall of the first support frame (2). Movable partitions (20) are slidably connected to both sides inside the carrying container (19), and fixed columns (21) are fixedly connected to the surface of the movable partitions (20). The fixed column (21) is slidably connected to the bearing container (19). Both sides of the top of the bottom plate (1) are provided with sliding grooves, and a displacement detection device (18) is slidably connected inside the sliding grooves. A groove is provided on the side of the fixed column (21) away from the movable partition (20). The probe of the displacement detection device (18) is inserted into the groove. A bolt (27) is threaded inside the fixed column (21). A slot is provided on the surface of the probe of the displacement detection device (18). The bolt (27) is inserted into the slot.

2. A concrete shrinkage testing device according to claim 1, wherein: A drive box (14) is fixedly connected to the top of the base plate (1). A threaded rod (15) is rotatably connected inside the drive box (14). Connecting columns (16) are slidably connected to both sides inside the drive box (14). The connecting columns (16) are fixedly connected to the displacement detection device (18). The threaded rod (15) is threadedly connected to the connecting column (16). A third motor (17) is fixedly connected to the right side of the drive box (14). The output end of the third motor (17) is fixedly connected to the threaded rod (15).

3. A concrete shrinkage testing device according to claim 2, wherein: Square tubes (23) are fixedly connected to the front and rear sides of both sides of the carrying container (19). Sliding grooves are provided on both sides of the top of the bottom plate (1), and a locking frame (24) is slidably connected inside the sliding groove. The locking frame (24) is inserted into the square tube (23). A compression spring is fixedly connected to the side of the locking frame (24) away from the movable partition (20). The end of the compression spring away from the locking frame (24) is fixedly connected to the inner wall of the sliding groove. A handle is fixedly connected to the side of the locking frame (24) away from the movable partition (20).

4. A concrete shrinkage test device according to claim 3, wherein: The top of the carrying container (19) is fixedly connected to a sealing plate (26) by screws, and handles are fixedly connected to both sides of the top of the sealing plate (26).

5. A concrete shrinkage test device according to claim 4, wherein: The top of the first support frame (2) is fixedly connected with a protective frame (25), and there are several protective frames (25), which are evenly distributed on the top of the first support frame (2).

6. A concrete shrinkage test device according to claim 5, wherein: The drive box (14) is internally fixedly connected to a bearing, and the outer ring of the bearing is fixedly connected to the drive box (14), and the inner ring of the bearing is fixedly connected to the threaded rod (15).

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