CN221840863U - Concrete strength detection device - Google Patents

Abstract

The utility model relates to the technical field of concrete strength detection, and specifically to a concrete strength detection device. The utility model comprises a pressure platform, a U-shaped bracket is fixedly installed on the top surface of the pressure platform, a hydraulic cylinder is fixedly installed on the top surface of the U-shaped bracket, and a pressure block is fixedly installed on the telescopic end of the hydraulic cylinder; four movable grooves are opened on the top surface of the pressure platform, and the four movable grooves are distributed in an array circumferentially about the center of the pressure platform; a centering mechanism is fixedly installed on the bottom surface of the pressure platform, and the centering mechanism comprises a primary limiting component and a secondary limiting component; the primary limiting component and the secondary limiting component are cross-vertically distributed on the bottom surface of the pressure platform, and two symmetrically arranged centering rods are fixedly installed in the primary limiting component and the secondary limiting component, and the four centering rods respectively pass through the four movable grooves to the top of the pressure platform. In the centering mechanism of the utility model, the alignment accuracy between the concrete test block and the pressure block is improved by setting the primary and secondary limiting components.

Description

A concrete strength testing device

Technical Field

The utility model relates to the technical field of concrete strength detection, in particular to a concrete strength detection device.

Background Art

In order to ensure the safety and durability of concrete during use, concrete needs to be subjected to a compression test. During the test, a concrete test block is placed in a testing device, and the compressive strength of the concrete is calculated by applying gradually increasing pressure to the test block until the test block is destroyed.

The existing testing device includes a pressure platform for placing test blocks, a pressure sensor and a hydraulic cylinder. The hydraulic cylinder is arranged above the pressure platform, and a pressure block is installed at the front end of the hydraulic cylinder. During the test, the pressure block is driven by the hydraulic cylinder to press the test block on the pressure platform, and the pressure sensor records the pressure size, thereby realizing the compression resistance test of the concrete.

However, the existing detection device still has the following problems when used:

When placing the concrete test block on the pressure platform for testing, the alignment accuracy of the test block position and the pressure block is low. When performing compression testing on the concrete test block, when the pressure block is not completely aligned with the concrete test block, pressure loading may cause the load to be applied to one side or corner of the sample block, rather than being evenly distributed over the entire sample block surface, which may cause the sample block's failure form to not meet the standard compression failure form, thereby reducing the accuracy of the test results.

Utility Model Content

The purpose of the utility model is to provide a concrete strength detection device to solve the problems raised in the above background technology.

The purpose of the utility model can be achieved through the following technical solutions:

A concrete strength testing device comprises a pressure platform, a U-shaped bracket is fixedly installed on the top surface of the pressure platform, a support leg is fixedly installed on the bottom surface of the pressure platform, a hydraulic cylinder is fixedly installed on the top surface of the U-shaped bracket, the hydraulic cylinder is located directly above the pressure platform, the telescopic end of the hydraulic cylinder slides through the U-shaped bracket to the bottom of the U-shaped bracket, and a pressure block is fixedly installed on the telescopic end of the hydraulic cylinder; four movable grooves are opened on the top surface of the pressure platform, and the four movable grooves are distributed in an array around the center of the pressure platform;

A centering mechanism is fixedly installed on the bottom surface of the pressure platform, and the centering mechanism includes a primary limit assembly and a secondary limit assembly; the primary limit assembly and the secondary limit assembly are cross-vertically distributed on the bottom surface of the pressure platform, and two symmetrically arranged centering rods are fixedly installed in the primary limit assembly and the secondary limit assembly, and the four centering rods respectively pass through the four movable grooves to the top of the pressure platform.

Further, the first-level limit assembly includes a mounting seat 1, the mounting seat 1 is fixedly mounted at the middle position of two opposite sides of the bottom surface of the pressure platform, a bidirectional screw rod 1 is rotatably mounted between the two mounting seats 1, and two sliding rods 1 symmetrically distributed about the bidirectional screw rod 1 are fixedly connected between the two mounting seats 1;

Two symmetrically distributed sliders are threadedly installed on the outer periphery of the bidirectional screw rod 1, and the slider 1 is slidably connected to the two slide rods 1, and the centering rod is fixedly installed on the top surface of the slider 1;

One end of the bidirectional screw rod 1 rotates and passes through a mounting seat 1 at a corresponding position, and a hand wheel 1 is fixedly mounted thereon.

Further, the secondary limit assembly includes a second mounting seat, the second mounting seat is fixedly mounted at the middle position of the other two opposite sides on the bottom surface of the pressure platform, a two-way screw rod is rotatably mounted between the two mounting seats, and two sliding rods symmetrically distributed about the two-way screw rod are fixedly connected between the two mounting seats, and the two-way screw rod is vertically distributed with respect to the one-way screw rod;

Two symmetrically distributed sliders are threadedly installed on the outer periphery of the bidirectional screw rod 2, and the slider 2 is slidably connected to the two slide rods 2, and the centering rod is fixedly installed on the top surface of the slider 2;

One end of the two-way screw rod 2 rotates and passes through the mounting seat 2 at the corresponding position, and a hand wheel 2 is fixedly mounted thereon.

Furthermore, the top ends of the four centering rods are of the same height, and a slot is provided at the top end of the centering rod, and the bottom surface of the slot is flush with the top surface of the pressure platform;

A protection component is installed between the four centering rods through the clamping slots, and the protection component is used to prevent the concrete test block from splashing during the pressure application process and causing injuries to people.

Furthermore, the protection component includes an elastic protection belt, the elastic protection belt is in a closed shape, and the elastic protection belt is connected between the four centering rods through the slot.

Beneficial effects of the utility model:

1. The centering mechanism of the utility model improves the alignment accuracy between the concrete test block and the pressing block by setting the primary and secondary limit assemblies, thereby avoiding the problem that the pressure loading may cause the load to be applied to one side or corner of the concrete test block instead of being evenly distributed on the entire sample surface due to incomplete alignment between the pressing block and the concrete test block, thereby reducing the accuracy of the test results.

2. During the compression test of the utility model, the elastic protective belt forms a protective layer on the periphery of the concrete test block, which can avoid the problem of injuries to personnel caused by the crushing and splashing of the concrete test block, thereby improving the operational safety of the test experiment of the utility model.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

Figure 1 is a schematic diagram of the overall structure of the utility model;

FIG2 is a three-dimensional schematic diagram of the installation position relationship between the centering mechanism and the pressure platform in the utility model;

FIG3 is a three-dimensional schematic diagram of FIG2 from another angle;

FIG4 is a three-dimensional schematic diagram of the connection relationship between the elastic protection belt and the centering mechanism in the utility model;

The reference numerals are as follows:

1-pressure platform, 2-support foot, 3-centering mechanism, 4-U-shaped bracket, 5-concrete test block, 6-pressure block, 7-hydraulic cylinder, 8-movable groove, 9-centering rod, 10-mounting seat one, 11-sliding rod one, 12-sliding block one, 13-bidirectional screw rod one, 14-mounting seat two, 15-handwheel one, 16-sliding rod two, 17-bidirectional screw rod two, 18-sliding block two, 19-handwheel two, 20-elastic protective belt, 21-card slot.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Embodiment 1:

Please refer to Figures 1 to 4. In the embodiment of the utility model, a concrete strength detection device includes a pressure platform 1, a U-shaped bracket 4 is fixedly installed on the top surface of the pressure platform 1, a support leg 2 is fixedly installed on the bottom surface of the pressure platform 1, a hydraulic cylinder 7 is fixedly installed on the top surface of the U-shaped bracket 4, the hydraulic cylinder 7 is located directly above the pressure platform 1, the telescopic end of the hydraulic cylinder 7 slides through the U-shaped bracket 4 to the bottom of the U-shaped bracket 4, and a pressure block 6 is fixedly installed on the telescopic end of the hydraulic cylinder 7; four movable grooves 8 are opened on the top surface of the pressure platform 1, and the four movable grooves 8 are arranged in an array around the center of the pressure platform 1;

A centering mechanism 3 is fixedly installed on the bottom surface of the pressure platform 1, and the centering mechanism 3 includes a primary limit assembly and a secondary limit assembly; the primary limit assembly and the secondary limit assembly are cross-vertically distributed on the bottom surface of the pressure platform 1, and two symmetrically arranged centering rods 9 are fixedly installed in the primary limit assembly and the secondary limit assembly, and the four centering rods 9 respectively pass through the four movable grooves 8 to the top of the pressure platform 1.

Among them, the first-level limit assembly includes a mounting seat 10, and the middle positions of the two opposite sides of the bottom surface of the pressure platform 1 are fixedly installed with a mounting seat 10, a bidirectional screw rod 13 is rotatably installed between the two mounting seats 10, and two sliding rods 11 symmetrically distributed about the bidirectional screw rod 13 are fixedly connected between the two mounting seats 10;

Two symmetrically distributed sliders 12 are threadedly installed on the outer periphery of the bidirectional screw rod 13, and the slider 12 is slidably connected with the two slide rods 11, and a centering rod 9 is fixedly installed on the top surface of the slider 12;

One end of the bidirectional screw rod 13 rotates through the mounting seat 10 at the corresponding position, and a hand wheel 15 is fixedly installed thereon.

Among them, the secondary limit assembly includes a second mounting seat 14, and the middle positions of the other two opposite sides on the bottom surface of the pressure platform 1 are fixedly mounted with the second mounting seat 14, and a two-way screw rod 17 is rotatably mounted between the two mounting seats 14, and two sliding rods 16 symmetrically distributed about the two-way screw rod 17 are fixedly connected between the two mounting seats 14, and the two-way screw rod 17 is vertically distributed with the two-way screw rod 13;

Two symmetrically distributed sliders 18 are threadedly installed on the outer periphery of the bidirectional screw rod 17, and the sliders 18 are slidably connected with the two slide rods 16, and a centering rod 9 is fixedly installed on the top surface of the slider 18;

One end of the bidirectional screw rod 17 rotates and passes through the mounting seat 14 at the corresponding position, and a hand wheel 19 is fixedly mounted thereon.

When the utility model is in use:

In the initial state, the centering rod 9 is located in the movable groove 8 at the extreme position far away from the center of the pressure platform 1, so that the space between the four centering rods 9 is in the maximum state;

When placing the concrete test block 5, the concrete test block 5 is placed on the pressure platform 1 and between the four centering rods 9. Then, the centering mechanism 3 drives the four centering rods 9 to clamp the concrete test block 5 on the four sides of the concrete test block 5 to the center position of the top surface of the pressure platform 1, thereby improving the alignment accuracy of the concrete test block 5 and the pressing block 6. Then, the centering mechanism 3 drives the four centering rods 9 to reset, so that the centering rods 9 are separated from the concrete test block 5, and the installation of the concrete test block 5 is completed. Then, the pressing block 6 is driven to descend by the hydraulic cylinder 7 to perform a compression test on the concrete test block 5.

Specifically, in the first-level limit assembly, the bidirectional screw rod 13 is rotated by the hand wheel 15, and the bidirectional screw rod 13 simultaneously drives the two sliders 12 to slide towards or away from each other on the slide rod 11, thereby driving the centering rod 9 to move in the movable groove 8;

Similarly, in the secondary limit assembly, the two-way screw rod 17 is rotated by the hand wheel 19, and the two-way screw rod 17 simultaneously drives the two sliders 18 to slide towards or away from each other on the slide rod 16, thereby driving the centering rod 9 to move in the movable groove 8;

Under ideal conditions, the concrete test block 5 is a cube, but there are dimensional deviations during actual cutting. The centering mechanism 3 of the utility model can clamp and limit the concrete test block 5 in sequence through the primary and secondary limiting components to avoid the situation where the centering accuracy is reduced due to the deviation in the side length of the concrete test block 5 when the four centering rods 9 are contracted at the same time; and the cutting requirements for the concrete test block 5 are reduced. It is not necessary to ensure that the concrete test block 5 is a cube, but only to ensure that the cross-section of the concrete test block 5 is a rectangle. At the same time, the utility model is also suitable for installing columnar concrete test blocks 5.

The centering mechanism 3 in the utility model improves the alignment accuracy between the concrete test block 5 and the pressing block 6 by setting the primary and secondary limit components, avoiding the problem that pressure loading may cause the load to be applied to one side or corner of the concrete test block 5 instead of being evenly distributed on the entire sample surface due to incomplete alignment of the pressing block 6 and the concrete test block 5, thereby reducing the accuracy of the test result.

Embodiment 2:

Please refer to FIG. 4 . On the basis of Embodiment 1, the top ends of the four centering rods 9 are at the same height. A slot 21 is formed at the top end of the centering rod 9 . The bottom surface of the slot 21 is flush with the top surface of the pressure platform 1 .

A protection component is installed between the four centering rods 9 through the clamping slots 21, and the protection component is used to prevent the concrete test block 5 from splashing during the pressure application process and causing injuries to personnel.

The protection component includes an elastic protection belt 20 . The elastic protection belt 20 is in a closed shape and is connected between four centering rods 9 through a slot 21 .

During the compression test, the elastic protective belt 20 forms a protective layer on the periphery of the concrete test block 5, which can avoid injuries to personnel caused by the concrete test block 5 being crushed and splashed, thereby improving the operational safety of the test experiment of the utility model.

The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims (5)

1. A concrete strength testing device, comprising a pressure platform (1), a U-shaped bracket (4) being fixedly mounted on the top surface of the pressure platform (1), a support leg (2) being fixedly mounted on the bottom surface of the pressure platform (1), a hydraulic cylinder (7) being fixedly mounted on the top surface of the U-shaped bracket (4), the hydraulic cylinder (7) being located directly above the pressure platform (1), the telescopic end of the hydraulic cylinder (7) slidingly passing through the U-shaped bracket (4) to the bottom of the U-shaped bracket (4), and a pressure block (6) being fixedly mounted on the telescopic end of the hydraulic cylinder (7); characterized in that four movable grooves (8) are formed on the top surface of the pressure platform (1), and the four movable grooves (8) are arranged in an array in a circumferential direction about the center of the pressure platform (1); A centering mechanism (3) is fixedly mounted on the bottom surface of the pressure platform (1), and the centering mechanism (3) comprises a primary limit assembly and a secondary limit assembly; the primary limit assembly and the secondary limit assembly are cross-vertically distributed on the bottom surface of the pressure platform (1), and two symmetrically arranged centering rods (9) are fixedly mounted in each of the primary limit assembly and the secondary limit assembly, and the four centering rods (9) respectively pass through the four movable grooves (8) to the top of the pressure platform (1). 2. A concrete strength detection device according to claim 1, characterized in that the first-level limit assembly comprises a mounting seat (10), the mounting seats (10) are fixedly mounted at the middle positions of two opposite sides of the bottom surface of the pressure platform (1), a bidirectional screw rod (13) is rotatably mounted between the two mounting seats (10), and two sliding rods (11) symmetrically distributed about the bidirectional screw rod (13) are fixedly connected between the two mounting seats (10); Two symmetrically distributed sliders (12) are threadedly mounted on the outer periphery of the bidirectional screw rod (13), and the sliders (12) are slidably connected to the two slide rods (11), and the centering rod (9) is fixedly mounted on the top surface of the slider (12); One end of the bidirectional screw rod (13) rotates through a mounting seat (10) at a corresponding position and is fixedly mounted with a hand wheel (15). 3. A concrete strength detection device according to claim 2, characterized in that the secondary limiting assembly comprises a second mounting seat (14), the second mounting seat (14) is fixedly mounted at the middle position of the other two opposite sides on the bottom surface of the pressure platform (1), a two-way screw rod (17) is rotatably mounted between the two second mounting seats (14), and two sliding rods (16) symmetrically distributed about the two-way screw rod (17) are fixedly connected between the two second mounting seats (14), and the two-way screw rod (17) is vertically distributed with respect to the one-way screw rod (13); Two symmetrically distributed sliders (18) are threadedly mounted on the outer periphery of the bidirectional screw rod (17), and the sliders (18) are slidably connected to the two slide rods (16), and the centering rod (9) is fixedly mounted on the top surface of the slider (18); One end of the bidirectional screw rod 2 (17) rotates through the mounting seat 2 (14) at the corresponding position and is fixedly mounted with a hand wheel 2 (19). 4. A concrete strength detection device according to claim 1, characterized in that the top ends of the four centering rods (9) are of the same height, a slot (21) is provided at the top end of the centering rod (9), and the bottom surface of the slot (21) is flush with the top surface of the pressure platform (1); A protection component is installed between the four centering rods (9) via the clamping slots (21), and the protection component is used to prevent the concrete test block (5) from splashing during the pressure application process, thereby preventing injuries to personnel. 5. A concrete strength detection device according to claim 4, characterized in that the protection component comprises an elastic protection belt (20), the elastic protection belt (20) is in a closed shape, and the elastic protection belt (20) is connected between the four centering rods (9) through the slot (21).