A bfrp tendon-concrete pull-out test device

Abstract

The utility model relates to a kind of BFRP tendon-concrete pull-out test device, belong to building structure performance detection technical field, including pedestal, the top of the pedestal is provided with pressing plate, the inside of the pressing plate is embedded with steel plate, the top of the pedestal and below the steel plate is placed with concrete body, the inside of the concrete body is inserted with long reinforcing steel, the top of the steel plate is provided with puller, the both ends in the puller inside are all set with mounting groove.The utility model has beneficial effect in that, by the piston rod of electric hydraulic cylinder, corresponding fixing piece can be moved upwards, then puller can be used to realize the pull-out operation of long reinforcing steel, and through the setting of monitoring component, detection result can be published on display, so that staff can check and record, simplify test operation process, reduce human error, ensure the high consistency and repeatability of test result.

Description

Technical Field

[0001] This utility model relates to the field of building structure performance testing technology, and in particular to a BFRP bar-concrete pull-out test device. Background Technology

[0002] During construction, it is necessary to test the bonding strength between steel fibers and concrete in reinforced concrete specimens to verify the quality of reinforced concrete structures and ensure the quality of construction projects. The equipment used for pull-out tests is usually a tensile testing machine, especially for determining the bond strength between BFRP (Basalt Fiber Reinforced Polymer) bars and concrete.

[0003] Currently, when measuring the slip value of the free end of a reinforcing bar, the staff places the reinforcing bar and a concrete block on a workbench, fixes the concrete block, and fixes the displacement gauge to the reinforcing bar. The displacement value of the reinforcing bar is displayed on the displacement gauge by pulling it with a small electric hydraulic cylinder or manually. The staff can then observe the data on the displacement gauge. However, traditional pull-out measurement requires a high degree of manual intervention, which not only results in large errors but also increases the workload of manual labor, making it impractical.

[0004] Therefore, we propose a BFRP bar-concrete pull-out test apparatus to address the aforementioned problems. Utility Model Content

[0005] In view of the above-mentioned problems existing in the prior art, the main objective of this utility model is to provide a BFRP bar-concrete pull-out test device.

[0006] The technical solution of this utility model is as follows: A BFRP bar-concrete pull-out test device includes a base, a pressure plate at the top of the base, a steel plate embedded inside the pressure plate, a concrete body placed at the top of the base and below the steel plate, a long reinforcing bar inserted inside the concrete body, a puller at the top of the steel plate, and mounting grooves at both ends of the puller. An electric hydraulic cylinder is fixedly installed inside each mounting groove, and a fixing member is fixedly connected to the piston rod of each electric hydraulic cylinder. A puller is fixedly connected between two fixing members.

[0007] By adopting the above technical solution, the piston rod of the electric hydraulic cylinder extends to push the corresponding fixing part upward, thereby enabling the pulling part to pull out the long steel bar. Furthermore, by setting up the monitoring component, the test results can be displayed on the screen.

[0008] In a preferred embodiment, the puller is provided with a mating component on its outer side. The mating component includes a plurality of pull wedges disposed inside the puller. The pull wedges are inserted between the puller and the long steel bar. The pull wedges abut against the inner wall of the puller and the outer wall of the long steel bar.

[0009] By adopting the above technical solution, the piston rod of the electric hydraulic cylinder retracts, causing multiple pulling wedges to disengage from the pulling component, thereby improving the repeatability of the device.

[0010] In a preferred embodiment, a monitoring component is provided on the outside of the puller. The monitoring component includes a displacement sensor fixedly installed on the outside of the puller. A control panel is fixedly installed on the outside of the base, and an AD sensor is fixedly installed on the outside of the base.

[0011] By adopting the above technical solution and setting up displacement sensors, the displacement of long steel bars can be monitored.

[0012] In a preferred embodiment, the monitoring component further includes a display fixedly mounted on the outside of the base, the display being positioned between the control panel and the AD sensor.

[0013] By adopting the above technical solution, data can be displayed on a monitor using a control panel, making it convenient for staff to record and view the data.

[0014] In a preferred embodiment, guide rods are fixedly connected to the four corners of the top of the base, and the guide rods are slidably connected to the inside of the pressure plate.

[0015] By adopting the above technical solution and using four guide rods, linear motion during the loading process can be ensured.

[0016] In a preferred embodiment, a retaining ring is fixedly connected to the bottom of the puller, and a retaining groove is provided inside the steel plate to cooperate with the retaining ring.

[0017] By adopting the above technical solution, the puller can be positioned and the detection efficiency can be improved through the combined use of the slot and the retaining ring.

[0018] In a preferred embodiment, the slot engages with the retaining ring, and the concrete body abuts against the bottom end of the pressure plate.

[0019] By adopting the above technical solutions and through conflicting arrangements, the stable placement of concrete blocks can be ensured.

[0020] In a preferred embodiment, the display, displacement sensor, electro-hydraulic cylinder, and AD sensor are all electrically connected to the control panel.

[0021] By adopting the above technical solution, the display, displacement sensor, electric hydraulic cylinder and AD sensor can be started and stopped through the control panel.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0023] 1. In this utility model, when pulling long steel bars, the puller can be inserted into the long steel bar and placed on a steel plate. Then, a hammer is used to knock the puller wedge between the puller and the long steel bar, so that the three are in close contact. By extending the piston rod of the electric hydraulic cylinder, the corresponding fixing part can be pushed upward, thereby enabling the puller to pull the long steel bar. This simplifies the test operation process, reduces human error, and ensures the high consistency and repeatability of the test results.

[0024] 2. In this utility model, after the pull-out test is completed, the piston rod of the electric hydraulic cylinder can be controlled to retract, so that multiple pull-out wedges are disengaged from the pull-out component, thereby improving the repeatability of the device. By setting up a displacement sensor, the displacement of the long steel bar can be monitored, and the data information is then transmitted to the AD sensor. The data is displayed on the monitor using the control panel, so that the staff can record and view the data. Attached Figure Description

[0025] Figure 1 This utility model provides an overall perspective view of a BFRP bar-concrete pull-out test device;

[0026] Figure 2 This utility model provides a partial schematic diagram of a BFRP bar-concrete pull-out test device;

[0027] Figure 3 This utility model provides a pull-out device cross-sectional view of the pull-out test apparatus for BFRP bars-concrete.

[0028] Legend: 1. Base; 2. Control panel; 3. Display; 4. Pressure plate; 5. Guide rod; 6. Steel plate; 7. Puller; 8. Pulling wedge; 9. Slot; 10. Pulling component; 11. Displacement sensor; 12. Mounting slot; 13. Electro-hydraulic cylinder; 14. Snap ring; 15. Fixing component; 16. AD sensor. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] Reference Figure 1-3 A BFRP (Brick-Fiber Reinforced Plastic) rebar-concrete pull-out test device includes a base 1, a pressure plate 4 at the top of the base 1, a steel plate 6 embedded inside the pressure plate 4, a concrete body placed on top of the base 1 and below the steel plate 6, a long rebar inserted inside the concrete body, a puller 7 at the top of the steel plate 6, and mounting grooves 12 at both ends of the puller 7. An electric hydraulic cylinder 13 is fixedly installed inside each mounting groove 12, and a fixing member 15 is fixedly connected to the piston rod of each electric hydraulic cylinder 13. A puller 10 is fixedly connected between two fixing members 15. The device is used to pull out long rebars. During the pulling process, the puller 7 can be inserted into the long rebar and placed on the steel plate 6. Then, the puller wedge 8 is hammered into the puller 10 and the long rebar with a hammer, so that the three are in close contact. The piston rod of the electric hydraulic cylinder 13 extends, which can push the corresponding fixing part 15 to move upward. Thus, the puller 10 can be used to pull the long rebar. Through the setting of the monitoring component, the test results can be displayed on the display 3 so that the staff can view and record them. This simplifies the test operation process, reduces human error, and ensures the high consistency and repeatability of the test results.

[0031] Specifically, the puller 7 has a mating assembly on its outer side, which includes multiple pull wedges 8 disposed inside the puller 10. The pull wedges 8 are inserted between the puller 10 and the long steel bar, and the pull wedges 8 abut against the inner wall of the puller 10. After the pull test is completed, the piston rod of the electric hydraulic cylinder 13 can be controlled to retract, so that the multiple pull wedges 8 are disengaged from the puller 10, thereby improving the repeatability of the device. The pull wedges 8 abut against the outer wall of the long steel bar. The puller 7 has a monitoring assembly on its outer side, which includes a displacement sensor 11 fixedly installed on the outer side of the puller 7. Through the installation of the displacement sensor 11, the displacement of the long steel bar can be monitored, and the data information is then transmitted to the AD sensor 16. The data is displayed on the display 3 through the control panel 2, so that the staff can record and view the data. The control panel 2 and the AD sensor 16 are fixedly installed on the outer side of the base 1.

[0032] Specifically, the monitoring components also include a display 3 fixedly installed on the outside of the base 1. The display 3 is located between the control panel 2 and the AD sensor 16. Guide rods 5 are fixedly connected to the four corners of the top of the base 1. The guide rods 5 are slidably connected to the inside of the pressure plate 4. The use of the four guide rods 5 can ensure linear movement during the loading process. A retaining ring 14 is fixedly connected to the bottom of the puller 7. The inside of the steel plate 6 is provided with a retaining groove 9 that works with the retaining ring 14. The use of the retaining groove 9 and the retaining ring 14 can position the puller 7 and improve the detection efficiency. The retaining groove 9 and the retaining ring 14 are engaged. The concrete body abuts against the bottom of the pressure plate 4. The display 3, displacement sensor 11, electric hydraulic cylinder 13 and AD sensor 16 are all electrically connected to the control panel 2. The control panel 2 can control the start and stop of the display 3, displacement sensor 11, electric hydraulic cylinder 13 and AD sensor 16.

[0033] Working principle: First, when pulling long reinforcing bars, the puller 7 is inserted into the long reinforcing bar and placed on the steel plate 6. Then, a hammer is used to knock the pulling wedge 8 between the puller 10 and the long reinforcing bar, making the three parts tightly in contact. Subsequently, the electric hydraulic cylinder 13 is started by controlling the control panel 2. The piston rod of the electric hydraulic cylinder 13 extends, which can push the corresponding fixing part 15 upward, thereby enabling the pulling part 10 to pull the long reinforcing bar. The displacement sensor 11 can monitor the displacement of the long reinforcing bar. The data is then transmitted to the AD sensor 16 and displayed on the monitor 3 via the control panel 2, facilitating data recording and viewing by staff. This simplifies the test operation process, reduces human error, and ensures high consistency of test results. After the pull-out test is completed, the piston rod of the electric hydraulic cylinder 13 can be controlled to retract, causing multiple pull-out wedges 8 to disengage from the pull-out component 10, thereby improving the repeatability of the device. Furthermore, the use of four guide rods 5 ensures linear motion during the loading process, improving detection accuracy.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0035] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A BFRP bar-concrete pull-out test device, comprising a base (1), characterized in that: A pressure plate (4) is provided at the top of the base (1). A steel plate (6) is embedded inside the pressure plate (4). A concrete body is placed at the top of the base (1) and below the steel plate (6). Long steel bars are inserted inside the concrete body. A puller (7) is provided at the top of the steel plate (6). An installation groove (12) is opened at both ends of the puller (7). An electric hydraulic cylinder (13) is fixedly installed inside the installation groove (12). A fixing member (15) is fixedly connected to the piston rod of the electric hydraulic cylinder (13). A puller (10) is fixedly connected between the two fixing members (15).

2. The BFRP tendon-concrete pull-out test device according to claim 1, characterized in that: The puller (7) is provided with a mating component on its outer side. The mating component includes a plurality of pull wedges (8) disposed inside the puller (10). The pull wedges (8) are inserted between the puller (10) and the long steel bar. The pull wedges (8) abut against the inner wall of the puller (10) and the outer wall of the long steel bar.

3. The BFRP tendon-concrete pull-out test device according to claim 1, characterized in that: A monitoring component is provided on the outside of the puller (7), the monitoring component includes a displacement sensor (11) fixedly installed on the outside of the puller (7), a control panel (2) is fixedly installed on the outside of the base (1), and an AD sensor (16) is fixedly installed on the outside of the base (1).

4. The BFRP tendon-concrete pull-out test device according to claim 3, characterized in that: The monitoring component also includes a display (3) fixedly installed on the outside of the base (1), the display (3) being positioned between the control panel (2) and the AD sensor (16).

5. The BFRP tendon-concrete pull-out test device according to claim 1, characterized in that: Guide rods (5) are fixedly connected to the four corners of the top of the base (1), and the guide rods (5) are slidably connected to the inside of the pressure plate (4).

6. The BFRP tendon-concrete pull-out test device according to claim 1, characterized in that: The bottom of the puller (7) is fixedly connected to a retaining ring (14), and the inside of the steel plate (6) is provided with a retaining groove (9) that cooperates with the retaining ring (14).

7. The BFRP tendon-concrete pull-out test device according to claim 6, characterized in that: The slot (9) engages with the ring (14), and the concrete body abuts against the bottom end of the pressure plate (4).

8. The BFRP bar-concrete pull-out test device according to claim 4, characterized in that: The display (3), displacement sensor (11), electric hydraulic cylinder (13) and AD sensor (16) are all electrically connected to the control panel (2).

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