Concrete bonding and drawing strength testing device

Abstract

The utility model discloses a concrete bonding and drawing strength testing device which comprises a base, a placing groove arranged above the base, a steel plate arranged inside the placing groove, a fixing mechanism arranged at the top end of the placing groove, a die groove arranged above the placing groove, a support arranged above the base and a drawing mechanism arranged below the support. By arranging the drawing mechanism and the clamping mechanism, the hydraulic telescopic rod is conveniently started through the controller to drive the mold groove to make close contact with a steel plate, the mold groove is prevented from moving in the concrete pouring process, and after concrete forming, the mold groove is conveniently driven to be away from concrete through the hydraulic telescopic rod; and the connecting plate is separated from the connecting rod, so that the mold groove is convenient to disassemble, and the tensile meter can conveniently test the bonding and drawing strength between the concrete and the steel plate.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete bond performance detection. Specifically, it relates to a device for testing the bond tensile strength of concrete. Background Technique

[0002] In engineering construction, it is often necessary to pour structures with concrete. At the same time, due to the requirements of engineering design, sometimes more than one type of concrete material is used. The bond strength at the connection interface of different types of concrete often directly determines the overall structural strength level. For the strength of concrete engineering structures, the tensile strength is often detected by a bond tensile strength testing device.

[0003] After retrieving a device for testing the bond tensile strength of concrete disclosed in Chinese Patent CN215375030U, the bond tensile strength between concrete and a steel plate can be directly measured by pouring the concrete on the steel plate, and the form removal is more convenient through the design of a wedge plate, with less disturbance to the concrete.

[0004] However, a device for testing the bond tensile strength of concrete still has some deficiencies. Although the concrete can be shaped conveniently by placing the wedge plate on the steel plate, there is no fixing mechanism on the outside of the wedge plate. During the process of pouring the concrete, the wedge plate may move, causing the concrete to leak, which is not conducive to the formation of the concrete. And after the concrete is formed, the concrete still needs to be transferred to a tensile testing instrument to measure the bond tensile strength between the concrete and the steel plate, and the operation is relatively complex, which is not beneficial for users to use. At present, no effective solution has been proposed for the problems in the related technology. Content of the Utility Model

[0005] In view of the problems in the related technology, the utility model proposes a device for testing the bond tensile strength of concrete to overcome the above-mentioned technical problems existing in the existing related technology.

[0006] For this reason, the specific technical solution adopted by the utility model is as follows:

[0007] A device for testing the bond tensile strength of concrete includes a base. There is a placement groove above the base. A steel plate is arranged inside the placement groove. A fixing mechanism is arranged at the top of the placement groove. A mold groove is arranged above the placement groove. A support is arranged above the base. A pulling mechanism is arranged below the support.

[0008] Furthermore, in order to facilitate the measurement of the pulling force of the concrete, the pulling mechanism includes a hydraulic telescopic rod arranged at the top of the support. The bottom end of the hydraulic telescopic rod is connected to a tensile force meter. The bottom end of the tensile force meter is connected to a connecting plate. A fixing plate is arranged below the connecting plate. The number of the fixing plates is two. An anchor post is arranged between the two fixing plates. The anchor post and the fixing plate are connected by bolts. The bolts are connected to nuts.

[0009] Further, the anchor post is disposed inside the mold groove. The mold groove is connected to the connecting plate through a connecting rod. The number of connecting rods is four, and a clamping mechanism is provided inside the connecting plate.

[0010] Further, in order to disassemble the mold groove after the injection molding is completed, the clamping mechanism includes a groove provided at the bottom end of the connecting plate. A spring is provided inside the groove. One end of the spring is connected to the connecting plate, and the other end is connected to a clamping block. A clamping groove is provided at the top end of the connecting rod, and the clamping groove matches the clamping block.

[0011] Further, in order to facilitate the movement of the clamping block, a moving plate is provided on one side of the clamping block. One end of the moving plate passes through the connecting plate and is located outside the connecting plate.

[0012] Further, in order to fix the steel plate and prevent the steel plate from moving during the bond pull-out strength test, which affects the accuracy of the test results, the fixing mechanism includes a screw rod provided at the top end of the placement groove. A threaded hole is provided inside the placement groove, and the screw rod matches the threaded hole. One end of the screw rod is rotatably connected to a clamping plate through a bearing, and the clamping plate is placed above the steel plate.

[0013] Further, a controller is provided on one side of the bracket. The controller is electrically connected to the hydraulic telescopic rod, and mounting holes are provided on the base.

[0014] The beneficial effects of the present utility model are as follows:

[0015] (1). By providing a pull-out mechanism and a clamping mechanism, it is convenient to start the hydraulic telescopic rod through the controller to drive the mold groove to be in close contact with the steel plate, preventing the mold groove from moving during the process of pouring concrete. And after the concrete is formed, it is convenient to drive the mold groove away from the concrete through the hydraulic telescopic rod, and it is convenient to disassemble the mold groove by separating the connecting plate from the connecting rod, facilitating the pull-out strength test of the bond between the concrete and the steel plate by the pull tester.

[0016] (2). By providing a fixing mechanism, it can prevent the steel plate from moving during the test of the bond pull-out strength between the concrete and the steel plate, which affects the test results, and can fix steel plates with different thicknesses, enhancing the practicability of this device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1It is the front view of a concrete bond pull - out strength testing device according to an embodiment of the present utility model.

[0019] Figure 2 It is the side view of a concrete bond pull - out strength testing device according to an embodiment of the present utility model.

[0020] Figure 3 It is the structural diagram of the clamping mechanism of a concrete bond pull - out strength testing device according to an embodiment of the present utility model.

[0021] Figure 4 It is the structural diagram of the fixing mechanism of a concrete bond pull - out strength testing device according to an embodiment of the present utility model.

[0022] In the figure:

[0023] 1. Base; 2. Placing groove; 3. Steel plate; 4. Fixing mechanism; 401. Screw; 402. Threaded hole; 403. Clamping plate; 5. Mold groove; 6. Bracket; 7. Pull - out mechanism; 701. Hydraulic telescopic rod; 702. Tensile instrument; 703. Connecting plate; 704. Fixed plate; 705. Anchor post; 706. Bolt; 707. Nut; 8. Connecting rod; 9. Clamping mechanism; 901. Groove; 902. Spring; 903. Block; 904. Card slot; 10. Moving plate; 11. Controller; 12. Mounting hole. Specific implementation manner

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] According to an embodiment of the present utility model, a concrete bond pull - out strength testing device is provided.

[0026] Embodiment 1

[0027] Such as Figures 1 - 4As shown in the figure, the concrete bond pull-out strength testing device according to the embodiment of the present utility model includes a base 1. Above the base 1, there is a placement groove 2. Inside the placement groove 2, there is a steel plate 3. At the top of the placement groove 2, there is a fixing mechanism 4. Above the placement groove 2, there is a mold groove 5. Above the base 1, there is a bracket 6. Below the bracket 6, there is a pulling mechanism 7. The pulling mechanism 7 includes a hydraulic telescopic rod 701 provided at the top of the bracket 6. The bottom end of the hydraulic telescopic rod 701 is connected to a tensile force gauge 702. The bottom end of the tensile force gauge 702 is connected to a connecting plate 703. Below the connecting plate 703, there is a fixing plate 704. The number of the fixing plates 704 is two. Between the two fixing plates 704, there is an anchor post 705. The anchor post 705 and the fixing plate 704 are connected by bolts 706. The bolts 706 are connected to nuts 707. The anchor post 705 is arranged inside the mold groove 5. The mold groove 5 is connected to the connecting plate 703 through a connecting rod 8. The number of the connecting rods 8 is four. Inside the connecting plate 703, there is a clamping mechanism 9. The clamping mechanism 9 includes a groove 901 provided at the bottom end of the connecting plate 703. Inside the groove 901, there is a spring 902. One end of the spring 902 is connected to the connecting plate 703, and the other end is connected to a clamping block 903. At the top end of the connecting rod 8, there is a clamping groove 904. The clamping groove 904 matches the clamping block 903. On one side of the clamping block 903, there is a moving plate 10. One end of the moving plate 10 passes through the connecting plate 703 and is placed outside the connecting plate 703.

[0028] As Figures 1 - 3 shown in the figure, the fixing mechanism 4 includes a screw 401 provided at the top of the placement groove 2. Inside the placement groove 2, there is a threaded hole 402. The screw 401 matches the threaded hole 402. One end of the screw 401 is rotatably connected to a clamping plate 403 through a bearing. The clamping plate 403 is placed above the steel plate 3. On one side of the bracket 6, there is a controller 11. The controller 11 is electrically connected to the hydraulic telescopic rod 701. There are mounting holes 12 on the base 1.

[0029] For the convenience of understanding the above technical solutions of the present utility model, the working principle or operation method of the present utility model in the actual process will be described in detail below.

[0030] In actual application, the expansion bolt passes through the mounting hole 12 and is connected to the ground, so as to fix this testing device. Then, the steel plate 3 is placed inside the placement groove 2, and by rotating the screw rod 401, the screw rod 401 is driven to move inside the threaded hole 402, driving the clamping plate 403 to move downward, so as to fix the steel plate 3. After the steel plate 3 is fixed, the hydraulic telescopic rod 701 is started by the controller 11, driving the mold groove 5 to move downward, so that the mold groove 5 moves downward and is in close contact with the steel plate 3. After pouring concrete into the mold groove 5 and the concrete hardens and forms, the anchor post 705 is placed inside the mold groove 5, which is convenient for applying force to the concrete after the concrete solidifies, disassembling the bolt 706 and the nut 707, and separating the anchor post 705 from the fixing plate 704. By starting the hydraulic rod again, the mold groove 5 is driven to move upward, separating the mold groove 5 from the concrete, making it more convenient to demold the concrete. Then, by pulling the moving plate 10, the clamping block 903 is driven to move away from the clamping groove 904, facilitating the disassembly of the connecting rod 8, and thus facilitating the disassembly of the mold groove 5, preventing the mold groove 5 from affecting the test of the bond pull-out strength of the concrete. Then, by starting the hydraulic rod, the tensile force meter 702 and the fixing plate 704 are driven to move downward, and the fixing plate 704 and the anchor post 705 are connected by the bolt 706 and the nut 707. Then, by starting the hydraulic telescopic rod 701, the concrete is pulled upward, enabling the tensile force meter 702 to measure the tensile force in real time, and recording the maximum value of the tensile force meter 702, which is the bond pull-out strength between the concrete and the steel plate 3.

[0031] In summary, by means of the above technical solutions of the present invention, by setting the pulling mechanism 7 and the clamping mechanism 9, it is convenient to start the hydraulic telescopic rod 701 by the controller 11 to drive the mold groove 5 to be in close contact with the steel plate 3, preventing the mold groove 5 from moving during the process of pouring concrete. And after the concrete forms, it is convenient to drive the mold groove 5 away from the concrete by the hydraulic telescopic rod 701. And by separating the connecting plate 703 from the connecting rod 8, it is convenient to disassemble the mold groove 5, facilitating the tensile force meter 702 to test the bond pull-out strength between the concrete and the steel plate 3. And by setting the fixing mechanism 4, it is prevented that the steel plate 3 moves during the process of testing the bond pull-out strength between the concrete and the steel plate 3, affecting the test result, and the steel plate 3 with different thicknesses can be fixed, enhancing the practicability of this device.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A concrete bond pull-out strength testing device, characterized in that: It comprises a base (1), a placement groove (2) is provided above the base (1), a steel plate (3) is provided inside the placement groove (2), a fixing mechanism (4) is provided at the top of the placement groove (2), a mold groove (5) is provided above the placement groove (2), a bracket (6) is provided above the base (1), and a pulling mechanism (7) is provided below the bracket (6); The pulling mechanism (7) comprises a hydraulic telescopic rod (701) arranged at the top end of the bracket (6); the bottom end of the hydraulic telescopic rod (701) is connected to a tensile gauge (702); the bottom end of the tensile gauge (702) is connected to a connecting plate (703); a fixing plate (704) is arranged below the connecting plate (703); two fixing plates (704) are provided; an anchor column (705) is arranged between the two fixing plates (704); the anchor column (705) is connected to the fixing plate (704) by a bolt (706); and the bolt (706) is connected to a nut (707).

2. A concrete bond pull-out strength testing device according to claim 1, characterized in that: The anchor column (705) is arranged inside the mold groove (5), and the mold groove (5) is connected to the connecting plate (703) through a connecting rod (8). The number of the connecting rods (8) is four, and a clamping mechanism (9) is arranged inside the connecting plate (703).

3. A concrete bond pull-out strength testing device according to claim 2, characterized in that: The clamping mechanism (9) comprises a groove (901) arranged at the bottom end of the connecting plate (703), a spring (902) is arranged inside the groove (901), one end of the spring (902) is connected to the connecting plate (703), and the other end is connected to the clamping block (903), and a clamping groove (904) is arranged at the top end of the connecting rod (8), and the clamping groove (904) matches the clamping block (903).

4. A concrete bond pull-out strength testing device according to claim 3, characterized in that: A movable plate (10) is provided on one side of the clamping block (903), and one end of the movable plate (10) passes through the connecting plate (703) and is placed outside the connecting plate (703).

5. A concrete bond pull-out strength testing device according to claim 1, characterized in that: The fixing mechanism (4) comprises a screw rod (401) arranged at the top end of the placement groove (2), a threaded hole (402) is arranged inside the placement groove (2), the screw rod (401) matches the threaded hole (402), one end of the screw rod (401) is rotatably connected to a clamping plate (403) via a bearing, and the clamping plate (403) is placed above the steel plate (3).

6. A concrete bond pull-out strength testing device according to claim 1, characterized in that: A controller (11) is provided on one side of the bracket (6), and the controller (11) is electrically connected to the hydraulic telescopic rod (701). A mounting hole (12) is provided on the base (1).

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