CN221803708U - Concrete strength testing device - Google Patents

Abstract

The utility model discloses a concrete strength testing device, comprising a testing platform and a top frame, wherein the testing platform is connected with a bearing platform via an X-axis moving control component, the top frame is connected with a hardness testing component via a Y-axis moving control component, and a compression test component is installed on the top frame; the hardness testing component comprises a moving seat, a sleeve is installed in the moving seat, a weight, a striking rod and a pressure sensor are arranged in the sleeve, a striking spring is fixedly installed on the weight, and one end of the striking spring away from the weight is installed on the inner wall of the sleeve; the compression test component comprises an electric control push rod and a pressure head, and the driving end of the electric control push rod is installed on the top frame.

Description

A concrete strength testing device

Technical Field

The utility model belongs to the technical field of concrete testing devices, and in particular relates to a concrete strength testing device.

Background Art

The strength test of concrete mainly tests two aspects, one is the concrete hardness, and the other is the compression test. The testing principle of concrete hardness is as follows: a heavy hammer containing a standard mass is used to impact the impact rod in contact with the concrete surface under the action of a standard spring force. Due to the elastic force, the heavy hammer will jump to the opposite distance, and at the same time it will drive the pointer, and then mark the rebound value (N) on the corresponding scale. This data directly reflects the hardness of the concrete, and the hardness of the material surface is related to the strength of the material itself. Therefore, the curve of the impact rebound value and the concrete strength can be drawn, and the concrete strength can be calculated relatively accurately based on the size of the rebound value.

Currently, the hardness and compression resistance of concrete need to be tested separately, which is cumbersome.

Utility Model Content

The utility model provides a concrete strength testing device.

The embodiments of the present invention are implemented by the following technical solutions:

A concrete strength testing device comprises a testing platform and a top frame, wherein the testing platform is connected to a bearing platform via an X-axis moving control component, the top frame is connected to a hardness testing component via a Y-axis moving control component, and a compression testing component is installed on the top frame;

The hardness test assembly comprises a moving seat, a sleeve is installed in the moving seat, a weight, a striking rod and a pressure sensor are arranged in the sleeve, a striking spring is fixedly installed on the weight, and the end of the striking spring away from the weight is installed on the inner wall of the sleeve;

The compression test assembly includes an electric control push rod and a pressure head, and the driving end of the electric control push rod is installed on the top frame;

The X-axis moving assembly includes a first driving motor and a first shaft seat, the output end of the first driving motor is fixedly connected to a first screw rod, and the first screw rod passes through the bearing platform and is threadedly connected to the bearing platform;

The Y-axis moving assembly includes a second driving motor and a second shaft seat. A second screw is fixedly connected to the output end of the first driving motor. The second screw passes through the moving seat and is threadedly connected to the moving seat.

Furthermore, a console is installed on the top of the sleeve, and a control rod is installed on the console. A circular hole groove is provided on the end of the impact rod away from the heavy hammer, and the control rod is slidably connected in the circular hole groove. A wedge-shaped block is connected to the control rod through a first elastic member, and a wedge-shaped groove is provided on the inner wall of the circular hole groove. The wedge-shaped block is slidably connected in the control rod in a horizontal direction, a first armature is installed on the wedge-shaped block, and a first electromagnet is installed on the control rod.

Furthermore, a starting assembly is installed on the outer side of the control rod, and the starting assembly includes a second electromagnet. A second armature is installed on the end of the impact rod away from the heavy hammer.

Furthermore, the first elastic member is a first compression spring.

Furthermore, a first guide rod passes through and is slidably connected to the bearing platform, and both ends of the first guide rod are fixedly installed on the bearing platform. A second guide rod passes through and is slidably connected to the movable seat, and both ends of the second guide rod are fixedly installed on the top frame.

Furthermore, rollers are installed at the bottom of the support platform.

Furthermore, a protective shell is provided on the outside of the pressure head, and the protective shell is connected to the pressure head through several groups of second elastic parts. The second elastic part includes a second compression spring, a telescopic rod and a telescopic table. The telescopic table is fixedly installed on the side of the pressure head. The second compression spring is fixedly connected between the telescopic table and the protective shell. One end of the telescopic rod is fixedly installed on the protective shell, and the other end passes through the telescopic table and is slidably connected to the telescopic table.

The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

An X-axis movement control component and a Y-axis movement control component are set up, and when used together, multi-point detection of concrete samples on the load-bearing platform can be completed, and the load-bearing platform can be moved to the bottom of the compression test component through the Y-axis movement control component to complete the compression test.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

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

FIG2 is a partial structural diagram of the top frame from above;

Fig. 3 is a cross-sectional view of a hardness testing device;

FIG. 4 is a partial structural diagram of the compression test device.

Icon: 1-test bench, 2-top frame, 3-bearing platform, 4-movable seat, 5-movable slot, 6-sleeve, 7-weight, 8-strike rod, 9-strike spring, 10-electrically controlled push rod, 11-pressure head, 12-first drive motor, 13-first screw, 14-first shaft seat, 15-second drive motor, 16-second screw, 17-second shaft seat, 18-circular hole slot, 19-control rod, 20-wedge block, 21-wedge slot, 22-first compression spring, 23-first electromagnet, 24-first armature, 25-pressure sensor, 26-second electromagnet, 27-second armature, 28-telescopic table, 29-telescopic rod, 30-second compression spring.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition and explanation in the subsequent drawings.

Example 1

A concrete strength testing device comprises a test bench 1 and a top frame 2, wherein the test bench 1 is connected to a bearing platform 3 via an X-axis motion control assembly, the top frame 2 is connected to a hardness testing assembly via a Y-axis motion control assembly, and a compression testing assembly is installed on the top frame 2. The test bench 1 is fixedly connected to the top frame 2 via multiple columns.

The hardness testing device includes a moving seat 4, which is arranged on the top frame 2. A sleeve 6 is fixedly installed inside the moving seat 4, and a moving groove 5 in the Y-axis direction is installed on the top frame 2. The sleeve 6 is slidably connected in the moving groove 5, so that the hardness testing device can move along the moving groove 5 in the Y-axis direction. The moving seat 4 is controlled to move by the Y-axis movement control component, and the two ends of the moving seat 4 are respectively penetrated by a second screw 16 and a second guide rod, the second screw 16 is threadedly connected to the moving seat 4, and the second guide rod is slidably connected to the moving seat 4. The second screw 16 and the second guide rod are both arranged along the Y-axis direction, one end of the second screw 16 is fixedly installed on the output end of the second drive motor 15, the second drive motor 15 is fixedly installed on the top frame 2, and the other end of the second screw 16 is rotatably connected to the second shaft seat 17, and the second shaft seat 17 is fixedly installed on the top frame 2. The movement of the moving seat 4 in the Y-axis direction is completed by the rotation of the second drive motor 15, and the second guide rod is used to stabilize the movement of the moving seat 4. A striking rod 8 for hardness testing is installed inside the sleeve 6, a heavy hammer 7 is installed at the bottom of the striking rod 8, a pressure sensor 25 is arranged on the inner wall of the sleeve 6, and a striking spring 9 is arranged on the outer sleeve of the striking rod 8, one end of the striking spring 9 is fixedly connected to the heavy hammer 7, and the other end is fixedly installed on the pressure sensor 25.

The test bench 1 is connected to a carrier platform 3 through an X-axis movement control component, and the X-axis movement control component includes a first drive motor 12 and a first shaft seat 14. A first screw 13 is fixedly connected to the output end of the first drive motor 12. The first screw 13 passes through the carrier platform 3 and is threadedly connected to the carrier platform 3. The end of the first screw 13 away from the first drive motor 12 is rotatably connected to the first shaft seat 14. The first shaft seat 14 is fixedly mounted on the test bench 1. A first guide rod is passed through and slidably connected to the carrier platform 3. Both ends of the first guide rod are fixedly mounted on the carrier platform 3. The first screw 13 and the first guide rod are respectively arranged on both sides of the carrier platform 3. The first guide rod is used to limit the rotation of the carrier platform 3 so that the carrier platform 3 can smoothly achieve translation when the first screw 13 rotates. Rollers are installed at the bottom of the carrier platform 3 to reduce friction during movement.

The compression test assembly includes an electric control push rod 10 and a pressure head 11. The driving end of the electric control push rod 10 is welded to the top frame 2. The output end of the electric control push rod 10 is set downward, and the pressure head 11 is fixedly installed on the output end. Two groups of sliding rods are set on the pressure head 11. The sliding rods pass through and are slidably connected to the top frame 2. The sliding direction of the sliding rods is consistent with the driving direction of the electric control push rod 10. The sliding rods are used to limit and stabilize the drive of the electric control push rod 10.

The principle of hardness testing is to use a spring-loaded hammer 7 to impact the concrete surface, and to calculate the concrete strength relatively accurately based on the rebound value. The concrete sample itself is usually not damaged. The compressive strength test is to pressurize the concrete under a specific pressure to test whether the concrete test block will break under the specific pressure. Concrete samples are often crushed, so the hardness test is completed first, and then the compression test is completed. During the test, the sampled concrete slab to be tested is placed on the bearing platform 3, and the hardness test is performed. The hammer 7 is controlled to pop up and cooperate with the pressure sensor 25 to complete the data test. The hardness test on the concrete surface requires multi-point detection. The current conventional measurement is to take 16 rebound values. When changing the detection point, the detection point can be switched arbitrarily by using the X-axis movement control component and the Y-axis movement control component. Then, the first drive motor 12 is controlled to drive the bearing platform 3 to the bottom of the compression test component to quickly complete the compression test.

As shown in Figure 3, a control console is installed on the top of the sleeve 6, and a control rod 19 is installed on the control console. A circular hole groove 18 is provided on the end of the impact rod 8 away from the hammer 7, and the control rod 19 is slidably connected in the circular hole groove 18. A wedge-shaped block 20 is connected to the control rod 19 through a first compression spring 22. A wedge-shaped groove 21 is provided on the inner wall of the circular hole groove 18. The wedge-shaped block 20 is slidably connected in the control rod 19 in the horizontal direction. A first armature 24 is installed on the wedge-shaped block 20, and a first electromagnet 23 is installed on the control rod 19. The wedge-shaped block 20 and the wedge-shaped slot 21 are provided to avoid repeated testing. In the initial state, the wedge-shaped block 20 is clamped in the wedge-shaped slot 21 to be fixed. When power is turned on, the first electromagnet 23 generates magnetism, thereby attracting the first armature 24 and the wedge-shaped block 20 to press back the first compression spring 22, so that the wedge-shaped block 20 is separated from the wedge-shaped slot 21, and the impact rod 8 can slide smoothly, and the test is completed by gravity. After the impact is completed, the first electromagnet 23 is powered off again. The wedge-shaped block 20 and the first compression spring 22 are still in a contracted state due to the inner wall restriction on the inner wall of the round tube until they slide into the wedge-shaped slot 21 to complete the clamping, thereby preventing the sliding rod from impacting the concrete sample again.

A starting assembly is installed outside the control rod 19, and the starting assembly includes a second electromagnet 26. A second armature 27 is installed on the end of the impact rod 8 away from the weight 7. After the initial impact of the impact rod 8 and the weight 7, the wedge-shaped block 20 may not be able to return to the wedge-shaped slot 21 due to insufficient rebound force. Therefore, the starting assembly is set to make the impact spring 9 preferentially in a compressed state to increase the driving force. After adding the starting assembly, the rebound value is calculated as the difference between the subsequent measured value and the value of the impact spring 9 squeezing the pressure sensor 25 during the startup process.

A protective shell is sleeved on the outside of the pressure head 11, and the protective shell is connected to the pressure head 11 through a plurality of groups of second elastic members. The second elastic member includes a second compression spring 30, a telescopic rod 29 and a telescopic platform 28. The telescopic platform 28 is fixedly mounted on the side of the pressure head 11. The second compression spring 30 is fixedly connected between the telescopic platform 28 and the protective shell. One end of the telescopic rod 29 is fixedly mounted on the protective shell, and the other end penetrates the telescopic platform 28 and is slidably connected to the telescopic platform 28. The protective shell is set to cover the concrete sample to prevent the debris from splashing and injuring the surrounding people and instruments when the concrete test block is broken. The bottom height of the protective shell is lower than the bottom height of the pressure head; when the electric push rod drives the protective shell and the pressure head to press down together, the protective shell first contacts the bearing platform (that is, the protective shell covers the bearing platform 3). At this time, the electric push rod continues to push down, and the pressure head continues to press down relative to the protective shell, and the concrete sample covered in the protective shell and located on the bearing platform is subjected to a compression test. The pressure head 11 is in contact with the concrete sample. To ensure that the protective shell can always be tightly attached to the bearing platform 3 during the compression test of the pressure head 11 , a second elastic member is used to connect the pressure head 11 and the protective shell.

The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims (7)

1. A concrete strength testing device is characterized in that: the test bench (1) is connected with a bearing table (3) through an X-axis movement control assembly, the top frame (2) is connected with a hardness test assembly through a Y-axis movement control assembly, and the top frame (2) is provided with a compression resistance test assembly;

The hardness testing assembly comprises a movable seat (4), a sleeve (6) is arranged in the movable seat (4), a heavy hammer (7), a flicking rod (8) and a pressure sensor (25) are arranged in the sleeve (6), a flicking spring (9) is fixedly arranged on the heavy hammer (7), and one end, far away from the heavy hammer (7), of the flicking spring (9) is arranged on the inner wall of the sleeve (6);

the compression test assembly comprises an electric control push rod (10) and a pressure head (11), and the driving end of the electric control push rod (10) is arranged on the top frame (2);

The X-axis movement control assembly comprises a first driving motor (12) and a first shaft seat (14), wherein a first screw rod (13) is fixedly connected to the output end of the first driving motor (12), and the first screw rod (13) penetrates through the bearing table (3) to be in threaded connection with the bearing table (3);

The Y-axis movement control assembly comprises a second driving motor (15) and a second shaft seat (17), a second screw rod (16) is fixedly connected to the output end of the first driving motor (12), and the second screw rod (16) penetrates through the movement seat (4) to be in threaded connection with the movement seat (4).

2. A concrete strength testing apparatus according to claim 1, wherein: the control cabinet is installed at sleeve (6) top, install control lever (19) on the control cabinet, bullet hits pole (8) and keeps away from and be provided with round hole groove (18) on weight (7) one end, control lever (19) sliding connection in round hole groove (18), be connected with wedge fixture block (20) on control lever (19) through first elastic component, round hole groove (18) inner wall is provided with wedge draw-in groove (21), wedge fixture block (20) sliding connection is in control lever (19) in the horizontal direction, installs first armature (24) on wedge fixture block (20), installs first electro-magnet (23) on control lever (19).

3. A concrete strength testing apparatus according to claim 2, wherein: the starting assembly is arranged on the outer side of the control rod (19), the starting assembly comprises a second electromagnet (26), and a second armature (27) is arranged on one end, far away from the heavy hammer (7), of the flicking rod (8).

4. A concrete strength testing apparatus according to claim 2, wherein: the first elastic member is a first compression spring (22).

5. A concrete strength testing apparatus according to claim 1, wherein: the bearing table (3) is penetrated and slidably connected with a first guide rod, two ends of the first guide rod are fixedly arranged on the bearing table (3), the movable seat (4) is penetrated and slidably connected with a second guide rod, and two ends of the second guide rod are fixedly arranged on the top frame (2).

6. A concrete strength testing apparatus according to claim 1, wherein: the bottom of the bearing table (3) is provided with rollers.

7. A concrete strength testing apparatus according to claim 1, wherein: the pressure head (11) outside cover has the protecting crust, the protecting crust passes through a plurality of groups of second elastic component and connects on pressure head (11), the second elastic component includes second compression spring (30), telescopic link (29) and flexible platform (28), flexible platform (28) fixed mounting is on pressure head (11) side, second compression spring (30) fixed connection is between flexible platform (28) i.e. protecting crust, the one end fixed mounting of telescopic link (29) is on the protecting crust, and the other end runs through flexible platform (28) and flexible platform (28) sliding connection.