A testing device for detecting the load bearing capacity of reinforced concrete

Abstract

The application discloses a kind of test devices for detecting reinforced concrete bearing capacity, it is related to tensile and compressive strength detection technical field, including bottom cabinet and drive assembly, still including two sliding shafts of fixed installation on bottom cabinet;Upper clamping unit is installed on two sliding shafts by sliding assembly, for the upper part of reinforcement is clamped and locked, the upper clamping unit includes frame body and clamping assembly installed on frame body, and the frame body is installed with counter-pressure cylinder.Occupation is in that not only tensile test can be carried out, but also compression test and bending test can be carried out, multifunctional is realized, and when reinforcing bar tensile test is carried out, the clamping force of clamping plate and counter plate to reinforcing bar can be changed automatically according to the longitudinal tensile force of reinforcing bar, effectively reduce the probability of reinforcing bar fracture at indentation, so that the data obtained by tensile test is more accurate.

Description

Technical Field

[0001] This invention relates to the field of tensile and compressive strength testing technology, and in particular to a testing device for testing the bearing capacity of reinforced concrete. Background Technology

[0002] Methods for testing the bearing capacity of reinforced concrete include field load testing, rebound testing, and material sampling testing. Among them, the material sampling testing method involves taking samples of the concrete and reinforcing steel in the reinforced concrete structure and then conducting tensile or compressive tests on the sampled concrete components and reinforcing steel.

[0003] Existing tensile and compressive strength tests are conducted separately and require different equipment. Furthermore, when testing the tensile strength of reinforcing bars, both ends of the reinforcing bars need to be clamped and fixed. The clamping part of existing reinforcing bar strength tensile testing devices usually consists of multiple components, requiring multiple operations to complete the clamping of the reinforcing bars. This results in a complex design of the clamping part, which is prone to failure.

[0004] The tensile components in the tensile process mostly use chain drive, which results in an unstable movement. Therefore, CN220603166U discloses a tensile strength testing device for building steel bars, which includes a base. A back plate is fixedly connected to the upper surface of the base near the rear edge. A movable plate is fixedly connected to the upper surface of the back plate. A movable plate is fixedly connected between the left and right inner surfaces of the base. A motor is fixedly connected to the lower surface of the movable plate. A lead screw is movably connected inside the movable plate. A hydraulic cylinder A is fixedly connected to the upper surface of the movable plate. A first push rod base plate is fixedly connected to the movable end of the hydraulic cylinder A. A lower push rod is movably connected to the upper surface of the first push rod base plate.

[0005] The above-mentioned device does not require complicated operating procedures when loading and unloading steel bars on the equipment. The steel bars can be easily fixed by hydraulic cylinder and pin. The steel bars can be stretched more smoothly by screw and nut combination, basically keeping the steel bars under balanced force. The guide column can keep the upper fixed plate moving in a straight line.

[0006] Most existing and aforementioned devices use clamps that converge towards the center to hold and lock the reinforcing bars. Since the reinforcing bars need to withstand extremely high tensile forces during tensile testing, the anti-slip teeth on the clamps engage with the threads of the reinforcing bars. This applies to threaded steel bars. However, for ordinary reinforcing bars with smooth surfaces, locking is achieved by applying pressure to make an indentation on the bar. During the tensile test, the resistance between the reinforcing bar and the clamp increases, but the locking force between the clamp and the reinforcing bar remains constant. Therefore, there is a probability of the reinforcing bar falling off. To avoid this, even greater force needs to be applied initially to create a deeper indentation to lock the reinforcing bar. This can severely damage the reinforcing bar at the connection point between the clamp and the reinforcing bar, potentially causing it to break at the indentation. Consequently, accurate tensile test data cannot be obtained.

[0007] Therefore, a new testing device for detecting the bearing capacity of reinforced concrete can be used to overcome the shortcomings of existing technologies. Summary of the Invention

[0008] The purpose of this invention is to solve the problems existing in the prior art and to propose a testing device for detecting the bearing capacity of reinforced concrete.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A testing device for detecting the bearing capacity of reinforced concrete includes a base cabinet and a drive assembly, and also includes two sliding shafts fixedly installed on the base cabinet;

[0011] The upper clamping unit is mounted on two sliding shafts via a sliding assembly and is used to clamp and lock the upper part of the reinforcing bar. The upper clamping unit includes a frame and a clamping assembly mounted on the frame, and a pressure roller is installed on the frame.

[0012] The lower clamping unit is fixedly installed on two sliding shafts via a base plate and is used to clamp and lock the bottom of the reinforcing bar. The lower clamping unit has the same design as the upper clamping unit. The base plate is equipped with a bending test component that cooperates with the pressure roller.

[0013] Preferably, the drive assembly includes a top plate fixedly mounted on the top of the sliding shaft, two hydraulic rods fixedly mounted on the top plate, a liquid source for driving the two hydraulic rods inside the base cabinet, and a control module that cooperates with the two hydraulic rods mounted on the base cabinet.

[0014] Preferably, a pressure sensor that cooperates with the hydraulic rod is installed in the base cabinet, and a limiter is installed in the base cabinet to control the maximum pressure of the hydraulic rod so that the pressure of the hydraulic rod is maintained within the normal range.

[0015] Preferably, the sliding assembly includes a movable plate, on which two sliding sleeves that cooperate with corresponding sliding shafts are fixedly installed. Multiple limiting shafts are fixedly installed on the base cabinet, and multiple through holes that cooperate with corresponding limiting shafts are provided on the movable plate.

[0016] Preferably, the clamping assembly includes a clamping plate and a stop plate slidably mounted on the frame, an adjustment mechanism is installed between the frame and the movable plate, and two limiting blocks that cooperate with the corresponding stop plates and clamping plates are fixedly installed on the frame;

[0017] The clamping plate is provided with multiple anti-slip grooves. The clamping plate and the abutment plate are both designed to be inclined on the side near the frame. A sliding mechanism is installed between the frame, the abutment plate, and the clamping plate.

[0018] A guide rod is rotatably mounted on both the abutment plate and the clamping plate. Two guide grooves with an inclined design are provided on the frame to cooperate with the corresponding guide rods. The inclination angle of the guide groove is the same as the inclination angle of one of the surfaces of the abutment plate and the clamping plate. A driving mechanism that cooperates with the abutment plate and the clamping plate is installed on the frame.

[0019] Preferably, the adjustment mechanism includes an angle adjustment rod that is fixedly mounted on the movable plate by bolts. The angle adjustment rod is connected to the frame by a universal coupling, and a locking sleeve that cooperates with the universal coupling is slidably mounted on the angle adjustment rod.

[0020] Preferably, the sliding mechanism includes rollers rotatably mounted on the back plate and the clamping plate, and the frame has two sliding grooves that cooperate with the corresponding rollers.

[0021] Preferably, the driving mechanism includes slots formed on the back plate and the clamping plate, a toothed rod is slidably installed in the frame, and a rotating shaft is rotatably installed in the frame. A rocker arm and a sector gear meshing with the toothed rod are fixedly installed on the rotating shaft. A pusher plate is fixedly installed at the bottom of the toothed rod, and the pusher plate extends into the slot. A limiting structure is installed between the rotating shaft and the frame.

[0022] Preferably, the limiting structure includes a support block fixedly installed on the frame and cooperating with the rotating shaft, a spring coil fixedly installed between the rotating shaft and the frame, a fixing frame fixedly installed on the frame, a screw rotatably installed on the fixing frame via a nut, a limit plate rotatably installed on the screw, the limit plate having a multi-tooth design, and multiple limiting teeth cooperating with the limit plate fixedly installed on the rotating shaft.

[0023] Preferably, the bending resistance test assembly includes a support plate fixedly installed at the bottom of the base plate, a support frame slidably installed on the base plate, a rotating plate rotatably installed on the support frame, an anti-slip plate fixedly installed on the rotating plate, slots being provided on both the support frame and the support plate, and the support frame and the support plate being locked together by a rod.

[0024] Compared with existing technologies, the advantages of this invention are:

[0025] 1. This device can perform not only tensile tests, but also compressive and bending tests, achieving multi-functionality. During the bending and compressive tests, the angle of the support point can be adjusted according to the bottom inclination angle of the concrete component to ensure that the bottom of the concrete component is completely in contact with the anti-slip plate, improving the stability of the concrete component. It also ensures the stability of the compressive test pressure, avoiding deviations in the compressive test due to unstable bottom support of the concrete component. It is suitable for regular concrete components as well as arched concrete components.

[0026] 2. When conducting tensile tests on reinforcing bars, this device uses freely movable abutment plates and clamps to clamp and lock the ends of the reinforcing bars. Since one side of the abutment plate and clamp is designed to be inclined, the clamping force of the abutment plate and clamp on the reinforcing bars will change with the longitudinal tension of the reinforcing bars during the tensile process, making the clamping of the reinforcing bars more stable and reducing the probability of the reinforcing bars falling off.

[0027] 3. When conducting tensile tests on reinforcing bars, this device, by setting limiting teeth and limiting clamps, can limit the maximum displacement of the abutment plate and clamp during the tensile test, avoiding excessive pressure between the clamp and the reinforcing bar, which could lead to the reinforcing bar being broken by the clamp, thus effectively protecting the reinforcing bar. At the same time, it can also prevent the reinforcing bar from breaking at the indentation point due to excessively deep clamp indentation, effectively ensuring the smooth progress of the tensile test and the validity of the data.

[0028] In summary, this device can perform not only tensile tests, but also compressive and bending tests, achieving multi-functionality. Furthermore, during tensile testing of reinforcing bars, it can automatically adjust the clamping force of the clamping plates and abutments on the reinforcing bars based on the longitudinal tensile force, effectively reducing the probability of the reinforcing bars breaking at the indentation point and making the data obtained from the tensile test more accurate. Attached Figure Description

[0029] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0030] Figure 1 This is a schematic diagram of a testing device for detecting the bearing capacity of reinforced concrete proposed in this invention.

[0031] Figure 2 for Figure 1 Enlarged schematic diagram of the moving plate and the upper clamping unit;

[0032] Figure 3 for Figure 1 Enlarged structural schematic diagram of the middle base plate and the lower clamping unit;

[0033] Figure 4 for Figure 3 Detailed schematic diagram of the planar structure along one of the angles;

[0034] Figure 5 for Figure 2 Detailed schematic diagram of the enlarged structure of the upper and middle clamping unit;

[0035] Figure 6 for Figure 5 Detailed schematic diagram of the structure after rotation at a certain angle;

[0036] Figure 7 for Figure 6 Detailed schematic diagram of the structure under tensile strength test conditions;

[0037] Figure 8 for Figure 5 Detailed schematic diagram of the structure after removing the locking sleeve and the pressure roller;

[0038] Figure 9 for Figure 8 Detailed schematic diagram of the planar structure along one of the angles;

[0039] Figure 10 for Figure 8 Detailed schematic diagram of the structure after removing the angle adjustment rod and universal coupling;

[0040] Figure 11 for Figure 10 Detailed diagram of the decomposed structure;

[0041] Figure 12 for Figure 11 Enlarged structural schematic diagram of the joystick and its surrounding components;

[0042] Figure 13 for Figure 11 Enlarged structural schematic diagram of the middle plate and its surrounding components;

[0043] Figure 14 for Figure 12 Enlarged schematic diagram of the central sector gear and rotating shaft;

[0044] Figure 15 for Figure 11 Enlarged structural schematic diagram of the center support plate and its surrounding components.

[0045] In the diagram: 1. Base cabinet, 2. Sliding shaft, 3. Limiting shaft, 4. Base plate, 5. Moving plate, 6. Hydraulic rod, 7. Upper clamping unit, 8. Sliding sleeve, 9. Locking sleeve, 10. Frame, 11. Support frame, 12. Support plate, 13. Insert rod, 14. Rotating plate, 15. Anti-slip plate, 16. Lower clamping unit, 17. Angle adjusting rod, 18. Universal coupling, 19. Pad plate, 20. Pressure roller, 21. Guide groove, 22. Guide rod, 23. Rocker arm, 24. Limiting block, 25. Clamping plate, 26. Supporting plate, 27. Sliding groove, 28. Roller, 29. Push plate, 30. Slot, 31. Gear, 32. Sector gear, 33. Anti-slip groove, 34. Rotating shaft, 35. Spring coil, 36. Support block, 37. Limiting tooth, 38. Fixing frame, 39. Limiting plate, 40. Screw. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Example 1: Refer to Figure 1 A testing device for detecting the bearing capacity of reinforced concrete includes a base cabinet 1 and a drive assembly, and also includes two sliding shafts 2 fixedly installed on the base cabinet 1.

[0048] The drive assembly includes a top plate fixedly mounted on top of the sliding shaft 2, two hydraulic rods 6 fixedly mounted on the top plate, a liquid source for driving the two hydraulic rods 6 inside the base cabinet 1, and a control module that cooperates with the two hydraulic rods 6 mounted on the base cabinet 1.

[0049] The hydraulic rod 6 can be a MA-63×1200 model hydraulic rod 6, and the fluid source for driving the hydraulic rod 6 is hydraulic oil. The hydraulic oil is generally composed of petroleum-based oil or synthetic oil, and has good oxidation resistance, anti-foaming properties and a high viscosity index.

[0050] The base cabinet 1 is equipped with a pressure sensor that works with the hydraulic rod 6. The base cabinet 1 is also equipped with a limit switch to control the maximum pressure of the hydraulic rod 6 and keep the pressure of the hydraulic rod 6 within the normal range.

[0051] Two hydraulic rods 6 are used here, and the two hydraulic rods 6 are designed symmetrically. This can improve the uniformity of pressure and avoid the situation where the driving pressure is eccentric, causing the sliding shaft 2 to be subjected to excessive pressure and thus deformed.

[0052] The pressure sensor monitors the pressure of the hydraulic rod 6 in real time and transmits the monitored data to the control module. Once the pressure of the hydraulic rod 6 exceeds the rated pressure, the control module will automatically stop the operation of the hydraulic rod 6 to protect it.

[0053] Example 2: This example differs from Example 1 in that: (Refer to...) Figures 1-15 The upper clamping unit 7 is mounted on two sliding shafts 2 via a sliding assembly and is used to clamp and lock the upper part of the reinforcing bar.

[0054] refer to Figure 1 The sliding assembly includes a movable plate 5, with the telescopic ends of two hydraulic rods 6 fixedly connected to the movable plate 5. Two sliding sleeves 8 that cooperate with the corresponding sliding shafts 2 are fixedly installed on the movable plate 5. Multiple limiting shafts 3 are fixedly installed on the base cabinet 1, and multiple through holes that cooperate with the corresponding limiting shafts 3 are opened on the movable plate 5.

[0055] The sliding sleeve 8 is equipped with balls. As the moving plate 5 moves on the sliding shaft 2, the sliding shaft 2 abuts against the balls in the sliding sleeve 8, which will drive the balls to rotate. This reduces the friction between the sliding sleeve 8 and the sliding shaft 2, thereby reducing the pressure output loss of the hydraulic rod 6 and making the test data more accurate.

[0056] As the movable plate 5 moves, the limiting shaft 3 slides within the through hole, where a ball bearing also rotates. The ball bearing reduces friction, and the engagement between the limiting shaft 3 and the through hole limits the movable plate 5. If the movable plate 5 deviates, lateral pressure will be generated between the movable plate 5 and the sliding shaft 2. At this time, due to the action of the limiting shaft 3 and the through hole, this lateral pressure will be distributed, reducing the probability of damage to the sliding shaft 2.

[0057] refer to Figure 2 , Figures 5-10 The upper clamping unit 7 includes a frame 10 and a clamping assembly mounted on the frame 10. A pressure roller 20 is mounted on the frame 10, and a pad 19 is rotatably mounted on the frame 10. A rotating frame is fixedly mounted on the pad 19. The rotating frame is rotatably connected to the pressure roller 20. The pad 19 and the frame 10 are connected by a damped rotation, which can be rotated to any position and then stopped. During the compression test, the pressure roller 20 is kept vertically downward. During the tensile test, the pressure roller 20 is rotated to a horizontal position, exposing the bottom of the frame 10.

[0058] The clamping assembly includes a clamping plate 25 and a stop plate 26 that are slidably mounted on the frame 10. An adjustment mechanism is installed between the frame 10 and the movable plate 5. Two limiting blocks 24 that cooperate with the corresponding stop plates 26 and clamping plates 25 are fixedly installed on the frame 10.

[0059] When clamping the reinforcing bars, insert one end of the reinforcing bar between the abutment plate 26 and the clamping plate 25. The insertion depth is determined according to the size of the reinforcing bar. The thicker the reinforcing bar, the deeper it is inserted to ensure sufficient clamping force and prevent the reinforcing bar from falling off.

[0060] The adjustment mechanism includes an angle adjustment rod 17 that is fixedly mounted on the movable plate 5 by bolts. The angle adjustment rod 17 is connected to the frame 10 by a universal coupling 18. A locking sleeve 9 that cooperates with the universal coupling 18 is slidably mounted on the angle adjustment rod 17.

[0061] refer to Figures 7-9 For the tensile strength test of reinforcing bars, for straight reinforcing bars, it is only necessary to keep the universal coupling 18 vertical. However, for some special reinforcing bars, such as arched reinforcing bars, it is necessary to test the tensile strength of the arch. In this case, the end of the arched reinforcing bar is not vertical. In this case, it is necessary to change the angle of the clamp plate 25 and the abutment plate 26 through the universal coupling 18. After the angle is changed, the angle adjustment rod 17 is fixed with bolts. The angle adjustment rod 17 is fixedly connected to the universal coupling 18. Therefore, the universal coupling 18 will not rotate around the central axis of the angle adjustment rod 17, but will rotate around the central axis of the universal coupling 18.

[0062] When testing straight reinforcing bars, the locking of the angle adjustment rod 17 can be loosened. During the stretching process, the reinforcing bar may twist due to the intermolecular forces. This twisting will cause the angle adjustment rod 17 to rotate, which will counteract the resistance caused by the twisting and improve the accuracy of the tensile strength test.

[0063] Keep the universal coupling 18 vertical. Then, put the locking sleeve 9 on the universal coupling 18 to lock it. At this time, the universal coupling 18 cannot rotate around its own central axis, but can only rotate around the central axis of the angle adjusting rod 17.

[0064] Multiple anti-slip grooves 33 are provided on the clamping plate 25. The clamping plate 25 and the abutment plate 26 are both designed to be inclined on the side near the frame 10. A sliding mechanism is installed between the frame 10, the abutment plate 26, and the clamping plate 25.

[0065] The anti-slip groove 33 will leave an imprint on the steel bar under the pressure of the clamping plate 25 and the steel bar to increase the friction. The purpose of the inclined design is that under the action of vertical tension, according to the force decomposition, horizontal and vertical forces can be generated. The horizontal force will squeeze the clamping plate 26 and the clamping plate 25 in the middle, increasing the clamping force, so that the clamping force is proportional to the tension.

[0066] See Figure 11 , Figure 15The sliding mechanism includes rollers 28 rotatably mounted on the abutment plate 26 and the clamping plate 25. The frame 10 has two sliding grooves 27 that cooperate with the corresponding rollers 28. Since the clamping plate 25 and the abutment plate 26 will slide inside the frame 10, wear will occur between the abutment plate 26 and the clamping plate 25 and the frame 10 during long-term use. The wear will cause unevenness on the inclined surfaces of the abutment plate 26 and the clamping plate 25. The unevenness will increase the friction between the abutment plate 26 and the clamping plate 25 and the frame 10, thus causing jamming. The rollers 28 designed here can effectively prevent jamming and make the abutment plate 26 and the clamping plate 25 slide more smoothly inside the frame 10.

[0067] A guide rod 22 is rotatably mounted on both the abutment plate 26 and the clamping plate 25. Two guide grooves 21 with an inclined design are provided on the frame body 10 to cooperate with the corresponding guide rods 22. The inclination angle of the guide groove 21 is the same as the inclination angle of one of the surfaces of the abutment plate 26 and the clamping plate 25. A driving mechanism that cooperates with the abutment plate 26 and the clamping plate 25 is installed on the frame body 10.

[0068] The ends of the reinforcing bars are clamped and locked by the freely movable abutment plate 26 and clamping plate 25. Since one side of the abutment plate 26 and clamping plate 25 is designed to be inclined, the clamping force of the abutment plate 26 and clamping plate 25 on the reinforcing bars will change with the longitudinal tension of the reinforcing bars during the tension process, making the clamping of the reinforcing bars more stable and reducing the probability of the reinforcing bars falling off.

[0069] The guide rod 22 and guide groove 21 are used to distribute the pressure force between the abutment plate 26 and clamping plate 25 and the frame 10 when they move, reducing the probability of the roller 28 center axis traveling. At the same time, the position of the guide rod 22 can be used to determine the displacement stroke of the abutment plate 26 and clamping plate 25.

[0070] The driving mechanism includes slots 30 formed on the support plate 26 and the clamping plate 25. A rack 31 is slidably installed inside the frame 10, and a rotating shaft 34 is rotatably installed on the frame 10. A rocker arm 23 and a sector gear 32 that meshes with the rack 31 are fixedly installed on the rotating shaft 34. A pusher plate 29 is fixedly installed at the bottom of the rack 31. The pusher plate 29 extends into the slot 30. A limiting structure is installed between the rotating shaft 34 and the frame 10.

[0071] Manually turning the rocker arm 23 will drive the rotating shaft 34 to rotate, which in turn drives the sector gear 32 to rotate. The rotation of the sector gear 32 drives the rack 31 to move, which in turn drives the push plate 29 to move. Since the push plate 29 is located in the slot 30, the movement of the push plate 29 will drive the abutment plate 26 and the clamping plate 25 to move vertically. Since one side of the abutment plate 26 and the clamping plate 25 is designed to be inclined, they will also move horizontally while moving vertically, thus clamping the steel bar.

[0072] The limiting structure includes a support block 36 fixedly installed on the frame 10 and cooperating with the rotating shaft 34. A spring coil 35 is fixedly installed between the rotating shaft 34 and the frame 10. A fixing frame 38 is fixedly installed on the frame 10. A screw 40 is rotatably installed on the fixing frame 38 via a nut. A limit plate 39 is rotatably installed on the screw 40. The limit plate 39 has a multi-tooth design. Multiple limit teeth 37 that cooperate with the limit plate 39 are fixedly installed on the rotating shaft 34.

[0073] Rotate screw 40 to adjust the distance between limit plate 39 and limit tooth 37. As the abutment plate 26 and clamping plate 25 move, the limit tooth 37 will rotate. There is a certain gap between the limit tooth 37 and the limit plate 39. After rotation, the limit tooth 37 will abut against the limit plate 39. In this way, the rotating shaft 34 will not rotate, that is, the abutment plate 26 and clamping plate 25 will not move, and the resulting imprint is the deepest set value.

[0074] During the tensile testing process, the maximum displacement of the structure on the abutment plate 26 and the clamping plate 25 can be limited, avoiding excessive pressure between the clamping plate 25 and the reinforcing bar, which could lead to the reinforcing bar being broken by the clamping plate 25. This effectively protects the reinforcing bar and also prevents the reinforcing bar from breaking at the indentation point due to excessive indentation by the clamping plate 25. This effectively ensures the smooth progress of the tensile test and the validity of the data.

[0075] The spring coil 35 can keep the upper abutment plate 26 and clamping plate 25 in the bottom position, so that the steel bar can be automatically clamped. The initial clamping force is the elastic force of the spring coil 35.

[0076] As the tension increases, the distance between the abutment plate 26 and the clamping plate 25 will decrease (the indentation becomes deeper, the diameter of the steel bar at the same position decreases, so the distance between the abutment plate 26 and the clamping plate 25 will decrease). At this time, both the abutment plate 26 and the clamping plate 25 will shift in the horizontal direction, making the clamping force of the clamping plate 25 and the abutment plate 26 on the steel bar increasingly stronger.

[0077] Initially, the clamping force between the clamping plate 25 and the reinforcing bar is small, and the indentation is shallow, so the effect on the tensile test of the reinforcing bar is negligible. As the indentation increases, the molecular structure inside the reinforcing bar changes, while the molecular structure at the indentation remains unchanged. Therefore, the reinforcing bar will break at the location where the molecular structure changes (mainly concentrated near the middle of the reinforcing bar).

[0078] The lower clamping unit 16 is fixedly installed on two sliding shafts 2 via the base plate 4, and is used to clamp and lock the bottom of the reinforcing bar. The lower clamping unit 16 has the same design as the upper clamping unit 7.

[0079] A bending resistance test assembly that cooperates with the pressure roller 20 is installed on the base plate 4. The bending resistance test assembly includes a support plate 12 fixedly installed at the bottom of the base plate 4, a support frame 11 slidably installed on the base plate 4, a rotating plate 14 rotatably installed on the support frame 11, and an anti-slip plate 15 fixedly installed on the rotating plate 14. Slots are provided on both the support frame 11 and the support plate 12. The support frame 11 and the support plate 12 are locked together by a plug rod 13.

[0080] When conducting bending tests on steel bars or concrete components, the position of the support frame 11 needs to be adjusted so that the anti-slip plate 15 on the support frame 11 is higher than the lower clamping unit 16. Then, the support frame 11 is locked by the insertion rod 13. During the test, the steel bars or concrete components are placed on the two anti-slip plates 15, and the pressure roller 20 is rotated to vertical downward so that the pressure roller 20 presses against the steel bars or concrete components to apply pressure for the compressive strength test.

[0081] The specific operating steps of this device are as follows:

[0082] Compressive strength test of steel bars or concrete components: Adjust the position of the support frame 11 so that the anti-slip plate 15 on the support frame 11 is higher than the lower clamping unit 16. Then lock the support frame 11 by inserting the rod 13. Next, place the steel bars or concrete components on the two anti-slip plates 15, rotate the pressure roller 20 to vertical downward so that the pressure roller 20 presses against the steel bars or concrete components and applies pressure to conduct a compressive strength test.

[0083] Rebar tensile test: Manually rotate the rocker arm 23 so that the rocker arm 23 rotates around the rotating shaft 34, which will drive the sector gear 32 to rotate, thereby driving the rack 31 to move. The movement of the rack 31 will drive the abutment plate 26 and the clamping plate 25 to move, which will cause the abutment plate 26 and the clamping plate 25 to separate. Then, insert the rebar between the abutment plate 26 and the clamping plate 25, release the rocker arm 23, and under the action of the spring coil 35, the abutment plate 26 and the clamping plate 25 will reset to clamp the rebar.

[0084] Next, the upper clamping unit is moved upward by the hydraulic rod 6 to perform a tensile test on the steel bar. As the tensile test proceeds, the tensile force on the steel bar increases. Under the gradually increasing tensile force, the abutment plate 26 and the clamping plate 25 will have a certain displacement, increasing the clamping force on the steel bar.

[0085] When the abutment plate 26 and clamping plate 25 move to the set value, the limiting tooth 37 will abut against the limiting plate 39, so the rotating shaft 34 will not rotate, that is, the abutment plate 26 and clamping plate 25 will not move, and the imprint reaches the maximum value.

[0086] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A testing device for detecting the bearing capacity of reinforced concrete, comprising a base cabinet (1) and a drive assembly, characterized in that, It also includes two sliding shafts (2) fixedly installed on the base cabinet (1); The upper clamping unit (7) is mounted on two sliding shafts (2) via a sliding assembly and is used to clamp and lock the upper part of the reinforcing bar. The upper clamping unit (7) includes a frame (10) and a clamping assembly mounted on the frame (10). A pressure roller (20) is mounted on the frame (10). The lower clamping unit (16) is fixedly installed on two sliding shafts (2) via a base plate (4) for clamping and locking the bottom of the reinforcing bar. The lower clamping unit (16) has the same design as the upper clamping unit (7). A bending test component that cooperates with the pressure roller (20) is installed on the base plate (4).

2. The testing device for detecting the bearing capacity of reinforced concrete according to claim 1, characterized in that, The drive assembly includes a top plate fixedly mounted on the top of the sliding shaft (2), two hydraulic rods (6) fixedly mounted on the top plate, a liquid source for driving the two hydraulic rods (6) inside the cabinet (1), and a control module that cooperates with the two hydraulic rods (6) mounted on the cabinet (1).

3. The testing device for detecting the bearing capacity of reinforced concrete according to claim 2, characterized in that, The cabinet (1) is equipped with a pressure sensor that works with the hydraulic rod (6). The cabinet (1) is also equipped with a limit switch to control the maximum pressure of the hydraulic rod (6) so that the pressure of the hydraulic rod (6) is kept within the normal range.

4. The testing device for detecting the bearing capacity of reinforced concrete according to claim 1, characterized in that, The sliding assembly includes a movable plate (5), on which two sliding sleeves (8) that cooperate with the corresponding sliding shafts (2) are fixedly installed. Multiple limiting shafts (3) are fixedly installed on the base cabinet (1). Multiple through holes that cooperate with the corresponding limiting shafts (3) are opened on the movable plate (5).

5. The testing device for detecting the bearing capacity of reinforced concrete according to claim 4, characterized in that, The clamping assembly includes a clamping plate (25) and a stop plate (26) slidably mounted on the frame (10). An adjustment mechanism is installed between the frame (10) and the moving plate (5). Two limiting blocks (24) that cooperate with the corresponding stop plate (26) and clamping plate (25) are fixedly installed on the frame (10). The clamping plate (25) is provided with multiple anti-slip grooves (33). The clamping plate (25) and the abutment plate (26) are both designed to be inclined on the side near the frame (10). A sliding mechanism is installed between the frame (10), the abutment plate (26), and the clamping plate (25). A guide rod (22) is rotatably mounted on both the abutment plate (26) and the clamping plate (25). Two guide grooves (21) with an inclined design are provided on the frame (10) to cooperate with the corresponding guide rods (22). The inclination angle of the guide grooves (21) is the same as the inclination angle of one of the surfaces of the abutment plate (26) and the clamping plate (25). A driving mechanism that cooperates with the abutment plate (26) and the clamping plate (25) is installed on the frame (10).

6. The testing device for detecting the bearing capacity of reinforced concrete according to claim 5, characterized in that, The adjustment mechanism includes an angle adjustment rod (17) that is fixedly mounted on the movable plate (5) by bolts. The angle adjustment rod (17) is connected to the frame (10) by a universal coupling (18). A locking sleeve (9) that cooperates with the universal coupling (18) is slidably mounted on the angle adjustment rod (17).

7. The testing device for detecting the bearing capacity of reinforced concrete according to claim 5, characterized in that, The sliding mechanism includes rollers (28) rotatably mounted on the abutment plate (26) and the clamping plate (25), and the frame (10) has two sliding grooves (27) that cooperate with the corresponding rollers (28).

8. The testing device for detecting the bearing capacity of reinforced concrete according to claim 5, characterized in that, The driving mechanism includes slots (30) on the abutment plate (26) and clamp plate (25). A rack (31) is slidably installed inside the frame (10), and a rotating shaft (34) is rotatably installed on the frame (10). A rocker arm (23) and a sector gear (32) meshing with the rack (31) are fixedly installed on the rotating shaft (34). A pusher plate (29) is fixedly installed at the bottom of the rack (31). The pusher plate (29) extends into the slot (30). A limiting structure is installed between the rotating shaft (34) and the frame (10).

9. The testing device for detecting the bearing capacity of reinforced concrete according to claim 8, characterized in that, The limiting structure includes a support block (36) fixedly installed on the frame (10) and cooperating with the rotating shaft (34). A spring coil (35) is fixedly installed between the rotating shaft (34) and the frame (10). A fixing frame (38) is fixedly installed on the frame (10). A screw (40) is rotatably installed on the fixing frame (38) via a nut. A limiting plate (39) is rotatably installed on the screw (40). The limiting plate (39) has a multi-tooth design. Multiple limiting teeth (37) cooperating with the limiting plate (39) are fixedly installed on the rotating shaft (34).

10. The testing device for detecting the bearing capacity of reinforced concrete according to claim 1, characterized in that, The bending resistance test assembly includes a support plate (12) fixedly installed at the bottom of the base plate (4), a support frame (11) slidably installed on the base plate (4), a rotating plate (14) rotatably installed on the support frame (11), an anti-slip plate (15) fixedly installed on the rotating plate (14), slots are provided on both the support frame (11) and the support plate (12), and the support frame (11) and the support plate (12) are locked together by a plug rod (13).

Images