Concrete strength testing device

Abstract

The invention discloses a concrete strength testing device which comprises a base and a hydraulic system located on one side of the base, the top of the base is connected with a top seat through symmetrically-arranged stand columns, a hydraulic cylinder is installed on the top seat, and a pressing head is detachably arranged at the output end of the hydraulic cylinder. Concrete test pieces are sequentially placed in test piece grooves according to numbers, a driving unit drives an annular rotating disc to drive the test pieces to move through a driving gear, when proximity switches get close to each other, the test pieces are located below a hydraulic cylinder and a pressing head, a hydraulic system controls the hydraulic cylinder to drive the pressing head to press the test pieces, and in the process, an upper sliding sleeve and a lower sliding sleeve synchronously descend; the test piece is covered, the hydraulic cylinder is prevented from retracting after the test piece is broken, disintegrating slag is splashed and the test piece is broken, the inner check ring and the outer check ring are mutually limited, the upper sliding sleeve and the lower sliding sleeve are lifted, the test piece leaks out, the annular rotating disc drives the next test piece to reach the position below the pressing head for testing, automatic switching of the test piece is achieved, and the testing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, and in particular to a concrete strength testing device. Background Art

[0002] One of the main indicators of concrete quality is compressive strength. It is not difficult to see from the concrete strength expression that the compressive strength of concrete is proportional to the strength of the cement used in concrete. According to the formula, when the water-cement ratio is equal, the compressive strength of concrete prepared with high-grade cement is much higher than that of low-grade cement. Generally speaking, the water-cement ratio is inversely proportional to the strength of concrete. When the water-cement ratio remains unchanged, it is wrong to increase the amount of cement to increase the strength of concrete. At this time, it can only increase the workability of concrete (refers to the fact that the newly mixed cement concrete is easy to operate in each process (mixing, transportation, pouring, tamping, etc.) and can obtain uniform quality and compact molding. Its meaning includes fluidity, cohesion and water retention. It is also called the workability of concrete), increase the shrinkage and deformation of concrete; the existing concrete strength testing equipment requires manual loading for testing, which is inefficient. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a concrete strength testing device.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A concrete strength testing device comprises a base and a hydraulic system located on one side thereof, wherein the top of the base is connected to a top seat via symmetrically arranged columns, a hydraulic cylinder is mounted on the top seat, a pressure head is detachably arranged at the output end of the hydraulic cylinder, a telescopic shield assembly is connected to the output end of the hydraulic cylinder, a height-adjustable platform is arranged on the column, a table top is mounted on the platform, and a rotatable multi-station workbench is mounted on the platform.

[0005] Preferably, the rotatable multi-station workbench includes an annular turntable, which is slidably arranged on the table surface and the table body, and the inner ring of the annular turntable is respectively provided with a driving gear and a driven gear, and the driven gear is connected to the table body through a connecting seat, and the driving gear is installed at the output end of the driving unit, and the driving unit is installed on the table body, and the driving gear and the driven gear are both engaged with the inner gear ring of the annular turntable.

[0006] Preferably, a plurality of specimen slots are provided on the top of the annular turntable, and the plurality of specimen slots are distributed at equal angles.

[0007] Preferably, the telescopic shield assembly comprises an upper sliding sleeve and a lower sliding sleeve, the lower end inner ring of the upper sliding sleeve is provided with an inner retaining ring, and the upper end outer ring of the lower sliding sleeve is provided with an outer retaining ring.

[0008] Preferably, the column is provided with a plurality of vertically arranged pin holes, in which locking pins are inserted, and the locking pins are connected to the platform body.

[0009] Preferably, the table top and the table body are both provided with rollers, and the rollers are located below the annular turntable.

[0010] Preferably, a proximity switch a is arranged on the table top, and a proximity switch b corresponding to the proximity switch a is arranged on the side of each specimen slot.

[0011] Preferably, the pressure head is threadedly connected to the hydraulic cylinder.

[0012] Preferably, the upper sliding sleeve and the lower sliding sleeve are both transparent structures.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention places the concrete specimens in the specimen slots in sequence according to the numbers, the driving unit drives the annular turntable to drive the specimen to move through the active gear, when the proximity switches are close to each other, the specimen is under the hydraulic cylinder and the pressure head, the hydraulic system controls the hydraulic cylinder to drive the pressure head to press against the specimen, during this process, the upper sliding sleeve and the lower sliding sleeve are synchronously lowered to cover the specimen to prevent the debris from splashing after the specimen is broken, after the specimen is broken, the hydraulic cylinder retracts, the inner retaining ring and the outer retaining ring restrict each other, the upper sliding sleeve and the lower sliding sleeve are raised, the specimen leaks out, and the annular turntable drives the next specimen to arrive under the pressure head for testing, thereby realizing automatic switching of the specimens and improving testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more specifically and intuitively illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0015] Figure 1 The structure of the present invention is shown in FIG. Figure 1 ; Figure 2 The structure of the present invention is shown in FIG. Figure 2 ; Figure 3 The structure of the present invention is shown in FIG. Figure 3 ; Figure 4 The structure of the present invention is shown in FIG. Figure 4 ; Figure 5 This is a schematic diagram of the structure of the telescopic shield assembly proposed by the present invention; Figure 6 for Figure 5 Schematic diagram of the AA cross-section structure.

[0016] In the figure: base 1, hydraulic system 2, hydraulic cylinder 3, telescopic shield assembly 4, upper sliding sleeve 41, lower sliding sleeve 42, inner retaining ring 43, outer retaining ring 44, table 5, table body 6, annular turntable 7, driven gear 8, specimen slot 9, drive unit 10, driving gear 11, pressure head 12, locking pin 13, pin hole 14, column 15, top seat 16. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Reference Figure 1-6 A concrete strength testing device comprises a base 1 and a hydraulic system 2 located on one side thereof. The top of the base 1 is connected to a top seat 16 through symmetrically arranged columns 15. A hydraulic cylinder 3 is installed on the top seat 16. A pressure head 12 is detachably provided at the output end of the hydraulic cylinder 3. A telescopic shield assembly 4 is connected to the output end of the hydraulic cylinder 3. A height-adjustable platform 6 is provided on the column 15. A table top 5 is installed on the platform 6. A rotatable multi-station workbench is installed on the platform 6.

[0019] The concrete specimens are placed in the specimen slots 9 in sequence according to their numbers. The driving unit 10 drives the annular turntable 7 through the active gear 11 to drive the specimen to move. When the proximity switches are close to each other, the specimen is under the hydraulic cylinder 3 and the pressure head 12. The hydraulic system 2 controls the hydraulic cylinder 3 to drive the pressure head 12 to press against the specimen. During this process, the upper sliding sleeve 41 and the lower sliding sleeve 42 are synchronously lowered to cover the specimen to prevent the debris from splashing after the specimen is broken. After the specimen is broken, the hydraulic cylinder 3 retracts, the inner retaining ring 43 and the outer retaining ring 44 restrict each other, and the upper sliding sleeve 41 and the lower sliding sleeve 42 are raised, and the specimen leaks out. The annular turntable 7 drives the next specimen to the bottom of the pressure head 12 for testing, thereby realizing automatic switching of the specimens and improving testing efficiency.

[0020] In this embodiment, the rotatable multi-station workbench includes an annular turntable 7, which is slidably arranged on the table surface 5 and the table body 6. The inner ring of the annular turntable 7 is respectively provided with a driving gear 11 and a driven gear 8. The driven gear 8 is connected to the table body 6 through a connecting seat. The driving gear 11 is installed at the output end of the driving unit 10, and the driving unit 10 is installed on the table body 6. The driving gear 11 and the driven gear 8 are both engaged with the inner gear ring of the annular turntable 7.

[0021] In this embodiment, a plurality of specimen slots 9 are arranged on the top of the annular turntable 7, and the plurality of specimen slots 9 are distributed at equal angles, so that one-time loading and testing can be achieved, which is highly efficient and can also avoid disordered sequence.

[0022] In this embodiment, the telescopic shield assembly 4 includes an upper sliding sleeve 41 and a lower sliding sleeve 42 . The lower inner ring of the upper sliding sleeve 41 is provided with an inner retaining ring 43 , and the upper outer ring of the lower sliding sleeve 42 is provided with an outer retaining ring 44 .

[0023] In this embodiment, a plurality of vertically arranged pin holes 14 are provided on the upright column 15 , and locking pins 13 are inserted into the pin holes 14 , and the locking pins 13 are connected to the platform body 6 .

[0024] In this embodiment, rollers are provided on both the table top 5 and the table body 6 , and the rollers are located below the annular turntable 7 .

[0025] In this embodiment, a proximity switch a is provided on the table 5, and a proximity switch b corresponding to the proximity switch a is provided on the side of each specimen slot 9. The pressure head 12 is threadedly connected to the hydraulic cylinder 3 for easy replacement. The upper sliding sleeve 41 and the lower sliding sleeve 42 are both transparent structures for easy observation of the internal conditions.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A concrete strength testing device, comprising a base (1) and a hydraulic system (2) located on one side thereof, wherein the top of the base (1) is connected to a top seat (16) via symmetrically arranged columns (15), characterized in that: A hydraulic cylinder (3) is mounted on the top seat (16); a pressure head (12) is detachably mounted on the output end of the hydraulic cylinder (3); a telescopic shield assembly (4) is connected to the output end of the hydraulic cylinder (3); a height-adjustable platform (6) is mounted on the column (15); a table top (5) is mounted on the platform (6); and a rotatable multi-station workbench is mounted on the platform (6).

2. A concrete strength testing device according to claim 1, characterized in that: The rotatable multi-station workbench comprises an annular turntable (7), which is slidably arranged on a table surface (5) and a table body (6), and the inner ring of the annular turntable (7) is respectively provided with a driving gear (11) and a driven gear (8), and the driven gear (8) is connected to the table body (6) through a connecting seat, and the driving gear (11) is installed at the output end of a driving unit (10), and the driving unit (10) is installed on the table body (6), and the driving gear (11) and the driven gear (8) are both meshed with the inner gear ring of the annular turntable (7).

3. A concrete strength testing device according to claim 2, characterized in that: A plurality of test piece slots (9) are arranged on the top of the annular turntable (7), and the plurality of test piece slots (9) are distributed at equal angles.

4. A concrete strength testing device according to claim 3, characterized in that: The telescopic shield assembly (4) comprises an upper sliding sleeve (41) and a lower sliding sleeve (42); the lower inner ring of the upper sliding sleeve (41) is provided with an inner retaining ring (43), and the upper outer ring of the lower sliding sleeve (42) is provided with an outer retaining ring (44).

5. A concrete strength testing device according to claim 4, characterized in that: The upright column (15) is provided with a plurality of vertically arranged pin holes (14), and locking pins (13) are inserted into the pin holes (14), and the locking pins (13) are connected to the platform body (6).

6. A concrete strength testing device according to claim 5, characterized in that: The table top (5) and the table body (6) are both provided with rotating rollers, and the rotating rollers are located below the annular rotating disk (7).

7. A concrete strength testing device according to claim 6, characterized in that: A proximity switch a is arranged on the table top (5), and a proximity switch b corresponding to the proximity switch a is arranged on the side of each test piece slot (9).

8. A concrete strength testing device according to claim 7, characterized in that: The pressure head (12) is threadedly connected to the hydraulic cylinder (3).

9. A concrete strength testing device according to claim 8, characterized in that: The upper sliding sleeve (41) and the lower sliding sleeve (42) are both transparent structures.

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