Drop hammer impact support device capable of preventing beam from jumping

Abstract

The utility model discloses a drop hammer impact support device capable of preventing a beam from jumping. The drop hammer impact support device comprises a base. The hinged support is hinged to the base; the guide rod is hinged to the base, and a hinge shaft of the guide rod is coaxial with a hinge shaft of the hinge support; the pressing beam is provided with a through hole, the guide rod penetrates through the through hole, and a cushion block is mounted at the bottom of the pressing beam and can be in direct contact with the test piece; the limiting piece is connected with the guide rod and used for limiting the position of the pressing beam on the guide rod; wherein a test piece is placed on the hinged support, and the pressing beam applies pressure to the test piece through the cushion block and clamps and fixes the test piece together with the hinged support. The test piece is clamped and fixed through the pressing beam and the hinged support, so that the probability that the test piece bounces and falls off under impact is reduced; and the hinged support and the guide rod are hinged to the base, and the hinged shafts of the hinged support and the guide rod are coaxial, so that even if the test piece is bent and deformed under impact, the hinged support and the guide rod can turn over along with bending of the test piece, and continuous clamping of the test piece is kept.

Description

Technical Field

[0001] The present application relates to the technical field of reinforced concrete component testing, and in particular to a drop hammer impact support device for preventing beams from falling off. Background Art

[0002] A drop hammer impact tester converts the gravitational potential energy of a falling hammer into kinetic energy to impact a test specimen. It is suitable for analyzing and studying the impact resistance of various components, such as beams, columns, and pipes. It can also be used to test the horizontal impact resistance of bridge piers, shear walls, and other structures. The drop hammer impact tester operates by lifting the hammer to the desired height and then releasing it, causing it to fall freely along a guide rail and strike the test specimen at a constant speed. This converts the gravitational potential energy into kinetic energy, thereby determining the damage and failure behavior of the component after the impact, as well as a series of dynamic response characteristics.

[0003] However, in actual testing, due to the rigid and fixed supports, the drop weight impacts the specimen, causing multiple rebounds. This process often causes the specimen to bounce along with the drop weight, breaking away from the supports and causing test failure. Alternatively, the specimen may bounce back and impact the supports again, affecting the test results. Therefore, to prevent the impact of beam bounce on test accuracy, a new drop weight impact support device is urgently needed to address this problem. Summary of the Invention

[0004] The purpose of this application is to solve at least one of the technical problems existing in the prior art, and to provide a drop hammer impact support device to prevent the beam from jumping out, so as to prevent the specimen from jumping out of the support due to unstable fixation after the drop hammer impact.

[0005] According to an embodiment of the first aspect of the present application, a drop hammer impact support device for preventing a beam from jumping off is provided, comprising:

[0006] base;

[0007] A hinged support, the hinged support being hinged to the base;

[0008] A guide rod, the guide rod being hinged to the base, the hinge axis of the guide rod being coaxial with the hinge axis of the hinge support;

[0009] A pressure beam, wherein the pressure beam is provided with a through hole, the guide rod passes through the through hole, and a pad is installed at the bottom of the pressure beam, and the pad can directly contact the test piece;

[0010] a limiting member connected to the guide rod and used to limit the position of the pressure beam on the guide rod;

[0011] The test piece is placed on the hinge support, and the pressure beam applies pressure to the test piece through the pad and clamps and fixes the test piece together with the hinge support.

[0012] According to an embodiment of the first aspect of the present application, further, the guide rod is provided with a thread, and the limiting member is specifically a nut, and the nut is threadedly connected to the guide rod and abuts against the pressure beam.

[0013] According to an embodiment of the first aspect of the present application, further, there are two nuts, one of which is against the top of the pressure beam, and the other is against the bottom of the pressure beam.

[0014] According to the embodiment of the first aspect of the present application, further, the limiting member is specifically a power push rod, and the power push rod is supported by the pressure beam and outputs a force to press the test piece.

[0015] According to the embodiment of the first aspect of the present application, further, the power push rod is specifically an electric push rod, a hydraulic push rod or a pneumatic push rod.

[0016] According to the embodiment of the first aspect of the present application, further, the pad is specifically an elastic member.

[0017] According to the embodiment of the first aspect of the present application, further, the side of the pad that contacts the specimen is an arc surface.

[0018] According to the first aspect embodiment of the present application, further, the base includes an upper pressure plate, a lower pressure plate, a connecting plate and a rib plate, the two sides of the connecting plate are respectively connected to the upper pressure plate and the lower pressure plate, and the rib plate is installed between the upper pressure plate and the lower pressure plate.

[0019] According to the first aspect embodiment of the present application, further, the area of ​​the lower pressure plate is larger than the area of ​​the upper pressure plate to increase the contact area with the ground, and there are multiple ribs and they are arranged at equal intervals.

[0020] According to the embodiment of the first aspect of the present application, further, there are two drop hammer impact support devices for preventing the beam from jumping off, and they respectively clamp the two ends of the test piece.

[0021] The beneficial effects of the embodiments of the present application include at least: the present application clamps and fixes the specimen through a pressure beam and a hinge support, thereby reducing the chance of the specimen bouncing and falling out under impact; and the hinge support and the guide rod are both hinged to the base, and the hinge axes of the two are coaxial. Even if the specimen bends and deforms under impact, the hinge support and the guide rod can flip over to conform to the bending of the specimen, thereby maintaining continuous clamping of the specimen. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly described. Obviously, the described drawings are only a part of the embodiments of the present application, and not all the embodiments. Those skilled in the art can obtain other design solutions and drawings from these drawings without paying creative labor.

[0023] Figure 1 is a three-dimensional view of the falling hammer impact support device for preventing beam jump-off in the embodiments of the present application;

[0024] Figure 2 is a side view of the falling hammer impact support device for preventing beam jump-off in the embodiments of the present application.

[0025] The reference signs: 100-base, 110-upper bearing plate, 120-lower bearing plate, 130-connection plate, 140-rib plate, 200-hinged support, 300-guide rod, 400-pressing beam, 410-pad, 500-nut, 600-test piece. DETAILED DESCRIPTION

[0026] This part will describe the specific embodiments of the present application in detail. The preferred embodiments of the present application are shown in the drawings, and the drawings are used to supplement the description of the text part of the description, so that people can intuitively and visually understand each technical feature and the overall technical solution of the present application. However, it cannot be understood as a limitation on the protection scope of the present application.

[0027] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, and it does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0028] In the description of the present application, several meanings are one or more, and multiple meanings are more than two. Greater than, less than, more than, etc. are not included in the number. Above, below, etc. are understood to include the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0029] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application according to the specific content of the technical solution.

[0030] A drop hammer impact tester converts the gravitational potential energy of a falling hammer into kinetic energy to impact a test specimen. It is suitable for analyzing and studying the impact resistance of various components, such as beams, columns, and pipes. It can also be used to test the horizontal impact resistance of bridge piers, shear walls, and other structures. The drop hammer impact tester operates by lifting the hammer to the desired height and then releasing it, causing it to fall freely along a guide rail and strike the test specimen at a constant speed. This converts the gravitational potential energy into kinetic energy, thereby determining the damage and failure behavior of the component after the impact, as well as a series of dynamic response characteristics.

[0031] However, in actual testing, due to the rigid and fixed supports, the drop weight impacts the specimen, causing multiple rebounds. This process often causes the specimen to bounce along with the drop weight, breaking away from the supports and causing test failure. Alternatively, the specimen may bounce back and impact the supports again, affecting the test results. Therefore, to prevent the impact of beam bounce on test accuracy, a new drop weight impact support device is urgently needed to address this problem.

[0032] In this regard, the present application proposes a drop hammer impact support device that prevents the beam from jumping off. The specimen 600 is clamped and fixed by the pressure beam 400 and the hinge support 200, thereby reducing the probability of the specimen 600 bouncing and falling out under impact; and the hinge support 200 and the guide rod 300 are both hinged to the base 100, and the hinge axes of the two are coaxial. Even if the specimen 600 is bent and deformed under impact, the hinge support 200 and the guide rod 300 can also flip over according to the bending of the specimen 600, thereby maintaining continuous clamping of the specimen 600.

[0033] Reference Figure 1 The drop hammer impact support device for preventing beam jumping in the embodiment of the present application includes a base 100, a hinge support 200, a guide rod 300, a pressure beam 400 and a limiter. The base 100 is the main structure of the drop hammer impact support device for preventing beam jumping, which is used to support other components of the drop hammer impact support device for preventing beam jumping and the test piece 600. The hinge support 200 is installed on the base 100 and is used to support the test piece 600. The guide rod 300 is used to connect the pressure beam 400, and the pressure beam 400 can move along the guide rod 300 and clamp the test piece 600 together with the hinge support 200. The limiter is used to limit the position of the pressure beam 400 on the guide rod 300 to prevent the pressure beam 400 from loosening during the impact of the test piece 600, thereby causing the clamping of the test piece 600 to fail.

[0034] Specifically, the base 100 is made of welded steel plates, and specifically includes an upper pressure plate 110, a lower pressure plate 120, a connecting plate 130 and a rib plate 140. The two sides of the connecting plate 130 are respectively connected to the upper pressure plate 110 and the lower pressure plate 120, and the three together form a "C"-shaped structure. The rib plate 140 is installed between the upper pressure plate 110 and the lower pressure plate 120, and is welded to the upper pressure plate 110, the lower pressure plate 120 and the connecting plate 130 as a whole. On the one hand, this steel structure has a strong structural strength and can withstand the vibration caused by the impact of the falling hammer without collapsing; on the other hand, the use of steel plates welded together can also reduce the weight of the base 100 itself, reduce material consumption, and facilitate subsequent assembly and disassembly.

[0035] Furthermore, the area of ​​the lower pressure plate 120 is larger than that of the upper pressure plate 110, so that the lower pressure plate 120 protrudes outward compared to the upper pressure plate 110, which can increase the contact area between the lower pressure plate 120 and the ground, thereby making the base 100 more stable and less likely to tip over after being placed or connected to the ground. There are multiple ribs 140, which are evenly spaced between the upper pressure plate 110 and the lower pressure plate 120. By providing multiple ribs 140, the support strength of the base 100 can be improved. Moreover, the equidistant arrangement of the ribs 140 makes the force applied to each rib 140 more balanced, preventing individual ribs 140 from being deformed due to excessive force.

[0036] The hinged support 200 is hinged to the base 100, and its top is made of steel. The specimen 600 is placed on the hinged support 200, which is used to directly contact and support the specimen 600. The top of the hinged support 200 can be configured as a flat or curved surface to meet the support requirements of different specimens 600. The end of the guide rod 300 is hinged to the base 100. Notably, the hinge axis of the guide rod 300 is coaxial with the hinge axis of the hinged support 200, allowing the guide rod 300 to rotate coaxially with the hinged support 200.

[0037] The pressure beam 400 has a through-hole extending therethrough, through which the guide rod 300 passes. This creates a sliding connection between the pressure beam 400 and the guide rod 300, allowing the pressure beam 400 to slide along the guide rod 300. When installing the test specimen 600, the pressure beam 400 can be separated from the guide rod 300. After the test specimen 600 is installed, the guide rod 300 can be inserted into the through-hole. To prevent the pressure beam 400 from swinging freely, at least two guide rods 300 pass through the pressure beam 400, and the pressure beam 400 is provided with through-holes corresponding to the number of guide rods 300.

[0038] A pad 410 is installed at the bottom of the compression beam 400 , and the pad 410 can directly contact the test piece 600 . When the compression beam 400 is pressed against the test piece 600 , the force is transmitted through the pad 410 .

[0039] Furthermore, pad 410 is specifically an elastic member. When compression beam 400 presses against specimen 600, pad 410 deforms under pressure and fully contacts specimen 600, increasing the contact area between pad 410 and specimen 600. Furthermore, when specimen 600 is impacted by a drop hammer, vibration is transmitted through specimen 600 to pad 410. The elastic pad 410 absorbs some of the vibration, thereby reducing the impact of vibration on compression beam 400. Compared to rigid members, elastic pad 410 is less likely to loosen under vibration, thus improving its anti-loosening capability.

[0040] Furthermore, the side of the pad 410 that contacts the specimen 600 is an arc-shaped surface, so that the pad 410 and the specimen 600 are in line-surface contact. If surface-surface contact is used, after the pressure beam 400 is deformed and bent by impact, the contact surface between the pad 410 and the pressure beam 400 may change in angle, thus losing its tight fit and posing a risk of loosening under impact. Therefore, the side of the pad 410 that contacts the specimen 600 is designed to be an arc-shaped surface, so that the two maintain line-surface contact. Even if the pressure beam 400 bends under impact, the pad 410 can still maintain a stable contact relationship with the specimen 600.

[0041] The limiting member is connected to the guide rod 300 and is used to limit the position of the pressure beam 400 on the guide rod 300 and enable the pressure beam 400 to continuously apply pressure to the specimen 600. The pressure beam 400 and the hinge support 200 together clamp and fix the specimen 600.

[0042] Specifically, the stopper can be a driving device with a power source, such as a power push rod. The power push rod abuts against the pressure beam 400 and continuously outputs a force to the pressure beam 400 to press the test piece 600. The power push rod can be an electric push rod, a hydraulic push rod, or a pneumatic push rod, and equipped with a corresponding power source. It is easy to understand that other forms of active driving devices can also be used, and will not be described in detail here.

[0043] The limiting member can also be a passive limiting mechanism. In this embodiment, the guide rod 300 is provided with threads, and the limiting member is specifically a nut 500. The nut 500 is adapted to the threads on the guide rod 300, thereby enabling the nut 500 to be threadedly connected to the guide rod 300. The end surface of the nut 500 is larger than the diameter of the through hole in the pressure beam 400. Therefore, when the nut 500 is tightened, the end surface of the nut 500 can abut against the pressure beam 400, thereby limiting the pressure beam 400 from sliding further.

[0044] Furthermore, there are two nuts 500, one of which abuts against the top of the pressure beam 400, and the other abuts against the bottom of the pressure beam 400. The two nuts 500 can clamp and fix the pressure beam 400, preventing the pressure beam 400 from freely moving along the guide rod 300 under impact, which would cause the clamping of the test piece 600 to fail.

[0045] Furthermore, the present beam-trap-preventing drop-hammer impact support device comprises two devices, each of which clamps and secures the two ends of the test specimen 600. In the two beam-trap-preventing drop-hammer impact support devices, the hinge axes of the two hinge supports 200 are parallel to each other, and the hinge axes of the two guide rods 300 are parallel to each other. When the test specimen 600 is deformed into a "V" shape by an impact, both the hinge supports 200 and the guide rods 300 are able to flip in accordance with the deformation of the test specimen 600, ensuring that the test specimen 600 can still be stably clamped even after deformation.

[0046] The following describes how to use the drop hammer impact support device to prevent beam jump:

[0047] S100. Loosen the nut 500 on the guide rod 300 to release the limit of the pressure beam 400;

[0048] S200. The pressure beam 400 is removed from the guide rod 300 and the angle of the hinge support 200 is adjusted to facilitate subsequent placement of the test piece 600 on top of the hinge support 200;

[0049] S300. Using a crane or other lifting equipment, the specimen 600 is moved to the top of the hinge support 200 so that the hinge support 200 supports the specimen 600;

[0050] S400. The pressure beam 400 is reinstalled on the guide rod 300;

[0051] S500. The nut 500 is reinstalled on the guide rod 300 and re-tightened so that the nut 500 abuts against the pressure beam 400, driving the pressure beam 400 to press against the specimen 600 and clamping the specimen 600 together with the hinge support 200;

[0052] S600. Complete the drop hammer impact support device to prevent the beam from jumping off the clamping fixture of the specimen 600, and start the drop hammer impact test;

[0053] S700. The drop hammer impacts the specimen 600, causing the specimen 600 to be deformed by the impact. The hinge support 200 and the guide rod 300 rotate in accordance with the deformation of the specimen 600, maintaining the clamping fixation of the specimen 600.

[0054] S800. After the experiment is completed, loosen the nut 500 and remove the pressure beam 400 from the guide rod 300. Use a crane or other lifting equipment to lift the test specimen 600 from the hinge support 200.

[0055] S900. Reinstall the pressure beam 400 and the nut 500 onto the guide rod 300, check whether there are any loose or worn components in the drop weight impact support device that prevents the beam from jumping off, and wait for the next experiment.

[0056] The above is a specific description of the preferred implementation methods of the present application, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A drop hammer impact support device for preventing beam from jumping off, characterized in that: include: base; A hinged support, the hinged support being hinged to the base; A guide rod, the guide rod being hinged to the base, the hinge axis of the guide rod being coaxial with the hinge axis of the hinge support; A pressure beam, wherein the pressure beam is provided with a through hole, the guide rod passes through the through hole, and a pad is installed at the bottom of the pressure beam, and the pad can directly contact the test piece; a limiting member connected to the guide rod and used to limit the position of the pressure beam on the guide rod; The test piece is placed on the hinge support, and the pressure beam applies pressure to the test piece through the pad and clamps and fixes the test piece together with the hinge support.

2. The drop weight impact support device for preventing beam from jumping off according to claim 1 is characterized in that: The guide rod is provided with a thread, and the limiting member is specifically a nut, which is threadedly connected to the guide rod and abuts against the pressure beam.

3. The drop weight impact support device for preventing beam from jumping off according to claim 2 is characterized in that: There are two nuts, one of which is against the top of the pressure beam, and the other is against the bottom of the pressure beam.

4. The drop weight impact support device for preventing beam from jumping off according to claim 1 is characterized in that: The limiting member is specifically a power push rod, which is supported by the pressure beam and outputs a force to press the test piece.

5. The drop weight impact support device for preventing beam from jumping off according to claim 4 is characterized in that: The power push rod is specifically an electric push rod, a hydraulic push rod or a pneumatic push rod.

6. The drop weight impact support device for preventing beam from jumping off according to claim 1 is characterized in that: The cushion block is specifically an elastic member.

7. The drop weight impact support device for preventing beam from jumping off according to claim 1 is characterized in that: The side of the pad that contacts the test piece is an arc surface.

8. The drop weight impact support device for preventing beam from jumping off according to claim 1 is characterized in that: The base includes an upper pressure plate, a lower pressure plate, a connecting plate and a rib plate, the two sides of the connecting plate are respectively connected to the upper pressure plate and the lower pressure plate, and the rib plate is installed between the upper pressure plate and the lower pressure plate.

9. The drop weight impact support device for preventing beam from jumping off according to claim 8, characterized in that: The area of ​​the lower pressure plate is larger than that of the upper pressure plate to increase the contact area with the ground. There are multiple ribs and they are arranged at equal intervals.

10. The drop weight impact support device for preventing beam from jumping off according to any one of claims 1 to 9, characterized in that: There are two drop hammer impact support devices for preventing the beam from jumping off, and they respectively clamp and fix the two ends of the test piece.

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