Pendulum bob type impact resistance testing device

Abstract

The utility model discloses a pendulum bob type shock resistance testing device which comprises a rack, a swing rod, a pendulum bob and a plate installation assembly, the plate installation assembly is connected to the rack, the rack is provided with a U-shaped block, one end of the swing rod is hinged to the U-shaped block, the other end of the swing rod is connected to the pendulum bob, the rack is provided with a limiting plate, and the limiting plate is connected with the plate installation assembly. The limiting plate is provided with a limiting block, the limiting block is an electromagnet, it can be mainly guaranteed that the height of the pendulum bob is consistent every time, the impact angle between the pendulum bob and a concrete plate can be conveniently adjusted, and it is avoided that due to insufficient experience of a tester, the measurement precision is affected.

Description

Technical Field

[0001] The utility model relates to the technical field of pendulum - type impact resistance testing, in particular to a pendulum - type impact resistance testing device. Background Art

[0002] Autoclaved aerated concrete slabs are a kind of lightweight, porous and new green environmental protection building material with cement, lime, silica sand, etc. as the main raw materials, and different numbers of anti - corrosion - treated steel mesh sheets are configured according to the structural requirements. After high - temperature, high - pressure and steam curing, autoclaved aerated concrete slabs with porous crystals are produced. Its density is smaller than that of general cement - based materials, and it has excellent fire - resistance, fire - proofing, sound - insulation, heat - insulation, heat - preservation and other unparalleled properties. When manufacturing existing autoclaved aerated concrete slabs, it is necessary to detect the impact resistance of the autoclaved aerated concrete slabs to determine the impact resistance of the autoclaved aerated concrete slabs and determine their scope of use. The autoclaved aerated concrete slab test requires the slab to be vertically fixed for testing. In the prior art, there are free - fall hammer tests and diamond - bit drilling tests for concrete slabs. The free - fall hammer test calculates the impact strength of the concrete by recording and measuring the elastic deformation and rebound height on the concrete surface. The results are affected by the surface state of the concrete and the experience of the tester, and it is not easy to accurately measure. For example, inconsistent hammer - fall heights each time, improper impact angles between the hammer body and the concrete slab, etc. will all affect the measurement accuracy. Content of the Utility Model

[0003] Aiming at the above - mentioned prior art, the utility model provides a pendulum - type impact resistance testing device, which can mainly ensure that the hammer - fall height is consistent each time and facilitate adjusting the impact angle between the pendulum and the concrete slab, avoiding the influence of inexperienced testers on the measurement accuracy.

[0004] To achieve the above object, the technical solution of the embodiment of the utility model is realized as follows:

[0005] A pendulum - type impact resistance testing device includes a frame, a pendulum rod, a pendulum hammer and a plate installation assembly. The plate installation assembly includes an installation base plate and a first fixing bolt. The first fixing bolt is installed on the installation base plate. The installation base plate is connected to the frame. The frame is provided with a U - shaped block. One end of the pendulum rod is hinged to the U - shaped block, and the other end is connected to the pendulum hammer. The frame is provided with a limiting plate, and the limiting plate is provided with a limiting block, and the limiting block is an electromagnet.

[0006] Further, the frame is provided with a first adjustment component, the first adjustment component includes a first screw rod, a smooth rod and a connecting plate, the smooth rod is connected to the connecting plate, the first screw rod is rotatably connected to the connecting plate, the connecting plate is connected to the frame, the U-shaped block is provided with a shaft hole matching with the smooth rod, and the U-shaped block is provided with a threaded hole matching with the first screw rod.

[0007] Further, the frame is provided with a second adjustment component, the second adjustment component includes a longitudinal adjustment component and a transverse adjustment component, the longitudinal adjustment component includes a first lower bottom plate, a first optical axis, a first slider, a second screw rod, a first nut and a first upper bottom plate, the first optical axis is fixedly connected to the first lower bottom plate, the first lower bottom plate is connected to the frame, the second screw rod is rotatably connected to the first lower bottom plate, the first slider is matched with the first optical axis, the first nut is matched with the second screw rod, the first upper bottom plate is connected to the first nut and the first slider, the transverse adjustment component includes a second lower bottom plate, a second optical axis, a second slider, a third screw rod, a second nut and a second upper bottom plate, the second lower bottom plate is connected to the first upper bottom plate, the second optical axis is fixedly connected to the second lower bottom plate, the third screw rod is rotatably connected to the second lower bottom plate, the second slider is matched with the second optical axis, the second nut is matched with the third screw rod, the second upper bottom plate is connected to the second nut and the second slider, and the mounting bottom plate is connected to the second upper bottom plate.

[0008] Further, the limiting block includes an upper convex block, a lower convex block and a locking bolt, both the upper convex block and the lower convex block are provided with convex ends, the locking bolt passes through the lower convex block and the upper convex block and is connected by thread fit, and the limiting plate is provided with a strip-shaped groove matching with the convex end.

[0009] Further, the first screw rod is provided with a knob handle, and the knob handle is fixedly connected to the first screw rod.

[0010] Further, the plate mounting component includes a transition plate and a second fixing bolt, and the two ends of the transition plate are respectively connected with the second fixing bolt.

[0011] Further, the material of the swing rod is 45# steel.

[0012] The beneficial effects of the present utility model are as follows: 1. The tester first places the concrete slab on the installation base plate. After adjusting the impact angle between the pendulum and the concrete slab, the concrete slab is fixedly installed on the installation base plate through the first fixing bolt. Then, when the pendulum rod is pulled counterclockwise close to the limit block, the electromagnet is energized to generate magnetism and attracts the pendulum rod to ensure that the pendulum rod falls from the same height each time. When the electromagnet is de-energized, the magnetic property disappears and the pendulum falls; 2. The longitudinal adjustment component and the transverse adjustment component are used to conveniently adjust the longitudinal and transverse displacements of the concrete slab to change the test position, and the adjustment structure has high precision and good stability, improving the accuracy and efficiency of the impact test; 3. The limit block is used to conveniently adjust the stroke of the pendulum; 4. The first adjustment component is used to conveniently adjust the rotation center of the pendulum, and further adjust the impact position between the pendulum and the concrete slab. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of a pendulum impact test device in an embodiment of the present application;

[0014] Figure 2 It is a partial schematic diagram of the second adjustment component in an embodiment of the present application;

[0015] Figure 3 It is a schematic structural diagram of the longitudinal adjustment component in an embodiment of the present application;

[0016] Figure 4 It is a schematic structural diagram of the transverse adjustment component in an embodiment of the present application;

[0017] Figure 5 It is a schematic structural diagram of the plate installation component in an embodiment of the present application;

[0018] Figure 6 It is a schematic structural diagram of the limit block in an embodiment of the present application;

[0019] Figure 7 It is a schematic structural diagram of the limit plate in an embodiment of the present application;

[0020] Figure 8 It is a schematic structural diagram of the U-shaped block in an embodiment of the present application;

[0021] Explanation of the reference numerals in the drawings:

[0022] 1 frame, 2 swing rod, 3 pendulum bob, 4 plate installation component, 5 U-shaped block, 6 limit plate, 7 limit block, 8 first adjustment component, 9 first screw, 10 smooth rod, 11 connecting plate, 12 shaft hole, 13 threaded hole, 14 installation bottom plate, 15 first fixing bolt, 16 second adjustment component, 17 longitudinal adjustment component, 18 transverse adjustment component, 19 first lower bottom plate, 20 first optical axis, 21 first slider, 22 second screw, 23 first nut, 24 first upper bottom plate, 25 second lower bottom plate, 26 second optical axis, 27 second slider, 28 third screw, 29 second nut, 30 second upper bottom plate, 31 upper convex block, 32 lower convex block, 33 locking bolt, 34 convex end, 35 strip groove, 36 knob handle, 37 transition plate, 38 second fixing bolt, 39 concrete plate. Detailed implementation mode

[0023] The technical solution of the present invention will be further elaborated in detail below in conjunction with the accompanying drawings of the specification and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, the expression "some embodiments" describes a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0024] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "inner", "outer", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0025] Embodiment 1

[0026] Refer to the appendix Figure 1-8, this application provides a pendulum - type impact - resistance testing device, including a frame 1, a pendulum rod 2, a pendulum bob 3 and a plate - mounting assembly 4. The plate - mounting assembly 4 includes a mounting base plate 14 and a first fixing bolt 15. The mounting base plate 14 is used for mounting the concrete plate 39 to be tested. The first fixing bolt 15 is installed on the mounting base plate 14 and is used for fixing the concrete plate 39 on the mounting base plate 14. The mounting base plate 14 is connected to the frame 1. The frame 1 is provided with a U - shaped block 5. One end of the pendulum rod 2 is hinged to the U - shaped block 5, and the other end is connected to the pendulum bob 3. The pendulum rod 2 and the pendulum bob 3 swing to impact the concrete plate 39 for impact - resistance testing. The frame 1 is provided with a limiting plate 6, and the limiting plate 6 is provided with a limiting block 7. The limiting block 7 is used for defining the falling position of the pendulum rod 2, and thus determining the falling position of the pendulum bob 3. The limiting block 7 is an electromagnet, and the material of the pendulum rod 2 is a magnetic - conductive material, such as iron oxide, iron - nickel alloy, carbon steel, etc. The electromagnet is used to generate a magnetic field to attract the pendulum rod 2 when energized. During operation, the tester first places the concrete plate 39 on the mounting base plate 14, lowers the pendulum bob 3, adjusts the angle between the pendulum bob 3 and the concrete plate 39, determines the impact position, tightens the first fixing bolt 15 to fix the concrete plate 39. Then, turn on the switch of the electromagnet to generate magnetism when energized. The tester drags the pendulum bob 3 counter - clockwise until the pendulum rod 2 touches the electromagnet and is attracted. Turn off the switch of the electromagnet, and the magnetism of the electromagnet disappears. The pendulum bob 3 falls along the pendulum rod 2 to impact the concrete plate 39 for impact - resistance testing. Record the deformation and rebound height of the concrete surface to calculate the impact strength of the concrete. By using the electromagnet to generate magnetism and attract the pendulum rod 2 when energized, it ensures that the falling height of the pendulum bob 3 is basically the same each time, makes up for the deficiency of the tester's experience, is convenient to adjust the impact angle between the pendulum bob 3 and the concrete plate 39, reduces the testing difficulty, and improves the accuracy and efficiency.

[0027] Specifically, the frame 1 is provided with a first adjusting assembly 8. The first adjusting assembly 8 includes a first screw rod 9, a smooth rod 10 and a connecting plate 11. The smooth rod 10 is connected to the connecting plate 11. The first screw rod 9 is rotatably connected to the connecting plate 11. The connecting plate 11 is connected to the frame 1. The U - shaped block 5 is provided with a shaft hole 12 that cooperates with the smooth rod 10, and the U - shaped block 5 is provided with a threaded hole 13 that cooperates with the first screw rod 9. By rotating the first screw rod 9, the U - shaped block 5 moves parallel along the smooth rod 10, so as to adjust the swing center of the pendulum rod 2, and further adjust the swing center of the pendulum bob 3, and finally adjust the impact position and angle between the pendulum bob 3 and the concrete plate 39. The structure is simple and the operation is convenient.

[0028] Preferably, the frame 1 is provided with a second adjustment assembly 16. The second adjustment assembly 16 includes a longitudinal adjustment assembly 17 and a transverse adjustment assembly 18. The longitudinal adjustment assembly 17 includes a first lower base plate 19, a first optical axis 20, a first slider 21, a second screw 22, a first nut 23, and a first upper base plate 24. The first optical axis 20 is fixedly connected to the upper surface of the first lower base plate 19. The first lower base plate 19 is connected to the frame 1. The second screw 22 is rotatably connected to the first lower base plate 19. The first slider 21 is engaged with the first optical axis 20. The first nut 23 is engaged with the second screw 22. The first upper base plate 24 is connected to the first nut 23 and the first slider 21. When the second screw 22 rotates to drive the first nut 23 to move, the first upper base plate 24 moves together with the first nut 23. The transverse adjustment assembly 18 includes a second lower base plate 25, a second optical axis 26, a second slider 27, a third screw 28, a second nut 29, and a second upper base plate 30. The second lower base plate 25 is connected to the first upper base plate 24. The second optical axis 26 is fixedly connected to the second lower base plate 25. The third screw 28 is rotatably connected to the second lower base plate 25. The second slider 27 is engaged with the second optical axis 26. The second nut 29 is engaged with the third screw 28. The second upper base plate 30 is connected to the second nut 29 and the second slider 27. When the third screw 28 rotates to drive the second nut 29 to move, the second upper base plate 30 moves together with the second nut 29. The mounting base plate 14 is connected to the second upper base plate 30. During operation, by rotating the second screw 22, the concrete slab 39 moves up and down, thereby longitudinally switching different test positions. By rotating the third screw 28, the concrete slab 39 moves left and right, thereby transversely switching different test positions. The structure has high precision and is simple and convenient to operate.

[0029] Embodiment 2

[0030] Refer to the attached Figure 1-8 In this embodiment, the difference from Embodiment 1 is that the limiting block 7 includes an upper convex block 31, a lower convex block 32, and a locking bolt 33. Both the upper convex block 31 and the lower convex block 32 are provided with convex ends 34. The locking bolt 33 passes through the lower convex block 32 and the upper convex block 31 and is connected by thread engagement. The limiting plate 6 is provided with a strip-shaped groove 35 that cooperates with the convex end 34. The cooperation between the convex end 34 and the strip-shaped groove 35 realizes guiding and positioning. When it is necessary to adjust the position of the limiting block 7, loosen the upper convex and lower convex blocks 32 by loosening the locking bolt 33, move and adjust the position of the limiting block 7 along the strip-shaped groove 35, and then tighten the locking bolt 33 to lock and fix it. The structure is simple and convenient for operation and maintenance.

[0031] Preferably, the first screw rod 9 is provided with a knob handle 36 which is fixedly connected to the first screw rod 9. The provision of the rotating handle facilitates the tester to rotate the first screw rod 9.

[0032] Specifically, the plate installation assembly 4 includes a transition plate 37 and second fixing bolts. The two ends of the transition plate 37 are respectively connected with the second fixing bolts 38, which are used to assist in installing the concrete plate 39 and strengthen the fixation of the concrete plate 39, preventing the concrete plate 39 from rotating due to the impact of the pendulum 3 and affecting the test accuracy. When installing the concrete plate 39, after roughly determining the position, pre-tighten the first fixing bolt 15 so that the concrete plate 39 can only rotate but not move. Rotate the second fixing bolt 38 to make it contact the concrete plate 39, and then rotate the second fixing bolt 38 to adjust the rotation of the concrete plate 39. When the impact angle between the pendulum 3 and the concrete plate 39 is appropriate, fix the second fixing bolt 38, and finally fix the first fixing bolt 15. This embodiment facilitates the tester to adjust the angle of the concrete plate 39, and has a simple structure, which is convenient for maintenance and use.

[0033] Preferably, the material of the pendulum rod 2 is No. 45 steel. No. 45 steel has high strength, good plasticity and toughness, and is not easy to deform, reducing the impact deformation of the pendulum rod 2 and affecting the test accuracy. No. 45 steel is a magnetic conductive material. When the electromagnet is powered off and demagnetized, the magnetic field disappears, and it automatically separates from the pendulum rod 2, and the pendulum rod 2 drops.

[0034] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A pendulum type impact resistance testing device, characterized in that: It includes a frame, a swing arm, a pendulum and a plate mounting assembly, the plate mounting assembly includes a mounting base plate and a first fixing bolt, the first fixing bolt is mounted on the mounting base plate, the mounting base plate is connected to the frame, the frame is provided with a U-shaped block, one end of the swing arm is hinged to the U-shaped block, and the other end is connected to the pendulum, the frame is provided with a limit plate, the limit plate is provided with a limit block, and the limit block is an electromagnet.

2. A pendulum type impact resistance testing device according to claim 1, characterized in that: The frame is provided with a first adjustment component, which includes a first screw rod, a smooth rod and a connecting plate, the smooth rod is connected to the connecting plate, the first screw rod is rotatably connected to the connecting plate, the connecting plate is connected to the frame, the U-shaped block is provided with an axial hole that cooperates with the smooth rod, and the U-shaped block is provided with a threaded hole that cooperates with the first screw rod.

3. A pendulum type impact resistance testing device according to claim 1, characterized in that: The frame is provided with a second adjustment component, the second adjustment component includes a longitudinal adjustment component and a lateral adjustment component, the longitudinal adjustment component includes a first lower base plate, a first optical axis, a first slider, a second screw, a first nut and a first upper base plate, the first lower base plate is connected to the frame, the first optical axis is fixedly connected to the first lower base plate, the second screw is rotatably connected to the first lower base plate, the first slider and the first optical axis cooperate, the first nut and the second screw cooperate, the first upper base plate is connected to the first nut and the first slider, the lateral adjustment component includes a second lower base plate, a second optical axis, a second slider, a third screw, a second nut and a second upper base plate, the second lower base plate is connected to the first upper base plate, the second optical axis is fixedly connected to the second lower base plate, the third screw is rotatably connected to the second lower base plate, the second slider and the second optical axis cooperate, the second nut and the third screw cooperate, the second upper base plate is connected to the second nut and the second slider, and the mounting base plate is connected to the second upper base plate.

4. The pendulum type impact resistance testing device according to claim 1, characterized in that: The limit block includes an upper convex block, a lower convex block and a locking bolt. The upper convex block and the lower convex block are both provided with a convex end. The locking bolt passes through the lower convex block and the upper convex block and is connected by threaded cooperation. The limit plate is provided with a strip groove that cooperates with the convex end.

5. The pendulum type impact resistance testing device according to claim 2, characterized in that: The first screw rod is provided with a knob handle, and the knob handle is fixedly connected to the first screw rod.

6. The pendulum type impact resistance testing device according to claim 1, characterized in that: The plate mounting assembly includes a transition plate and a second fixing bolt, and both ends of the transition plate are respectively connected to the second fixing bolts.

7. The pendulum type impact resistance testing device according to claim 1, characterized in that: The material of the swing rod is 45# steel.

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