Drop hammer type impact test device

Abstract

The utility model relates to a drop hammer type impact test device. The drop hammer type impact test device comprises a loading box, a support frame, an impact assembly and a traction assembly, the carrying box comprises a baffle and a box body with the upper side and the front side open, and the transparent baffle is arranged on the front side of the box body and detachably connected with the box body. The supporting frame is installed on a bottom plate of the box body, the traction assembly is installed on the supporting frame, and the impact assembly is connected with a traction cable of the traction assembly. According to the utility model, the loading box structure is adopted, and a sample is placed on the bottom plate and protected by the plates around, so that the sample can be prevented from being crushed and splashed in the test process, and the safety is improved; the transparent baffle facilitates observation; the baffle plate is detachably connected, so that a sample can be conveniently placed.

Description

Technical Field

[0001] The utility model relates to a testing device for civil engineering, in particular to a drop hammer impact test device. Background Art

[0002] The impact test is generally a test method for analyzing the safety, reliability and effectiveness of a product when it is subjected to an external force. Among them, the drop hammer test, also known as the drop weight test, and the main test device is a drop hammer testing machine. In the drop hammer test, the product is usually made into a specimen with a specific size, and the relationship between the impact energy and the specimen failure rate is obtained by hitting the specimen with a drop hammer from different heights.

[0003] For the drop hammer impact test of concrete material specimens, according to the recommendation of the American ACI544 committee, the specimens are usually round cake-shaped specimens with a diameter of 152 mm and a thickness of 63 mm. At present, most of the drop hammer impact test devices on the market conduct tests by making drop hammers with different weights. This method is often time-consuming and costly. Secondly, during the test, the specimen to be inspected is often sputtered around after being broken by the impact, which is extremely unsafe. In addition, the device is often integrated and not convenient for storage when idle.

[0004] Therefore, a drop hammer impact test device is needed to overcome the above defects. Summary of the Utility Model

[0005] Aiming at the technical problems existing in the prior art, the purpose of the utility model is to provide a drop hammer impact test device that can not only observe the test situation but also prevent the broken specimen from sputtering around.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A drop hammer impact test device includes a loading box, a support frame, an impact component and a traction component; the loading box includes a baffle, a box body that is open on both the upper side and the front side, and a transparent baffle is arranged on the front side of the box body and is detachably connected to the box body; the support frame is installed on the bottom plate of the box body, the traction component is installed on the support frame, and the impact component is connected to the traction cable of the traction component.

[0008] As a preference, the loading box further includes angle steels arranged in pairs on the left and right; the box body includes two side plates, a rear plate and a bottom plate; the angle steel includes a mounting section and a vertical section that are perpendicular to each other, the mounting section is fixed on the outside of the side plate, and a gap for inserting the baffle is left between the vertical section and the front end of the side plate.

[0009] As a preference, the support frame includes two guide columns and a transverse plate, and the transverse plate is installed between the two guide columns with adjustable height; the guide columns are fixed on the bottom plate of the box body, and the traction component is fixed on the transverse plate.

[0010] As a preference, the guiding column includes a threaded fixing pipe and a plurality of guiding rods; the lower end of the guiding rod is provided with a threaded connection head, and the upper end is provided with a threaded connection hole; the threaded fixing pipe is fixed on the bottom plate of the box body, the threaded connection head of the lowermost guiding rod is screwed with the threaded fixing pipe, and the threaded connection hole of the guiding rod is screwed with the threaded connection head of the previous guiding rod.

[0011] As a preference, two sliding holes are provided on the transverse plate, the guiding column penetrates into the sliding holes, and a fixing member is installed on the transverse plate, and the fixing member locks or loosens the transverse plate and the guiding column.

[0012] As a preference, the traction assembly includes a traction frame, a hand rocker, a traction shaft, and a traction cable; the traction shaft is rotatably connected to the traction frame, the hand rocker is connected to the traction shaft to drive the traction shaft to rotate, one end of the traction cable is fixedly connected to the traction shaft, the middle part is wound around the traction shaft, and the other end is connected to the impact assembly.

[0013] As a preference, the traction assembly further includes a limiting pipe and an iron attracting sheet; the vertical limiting pipe is arranged below the traction frame, and the other end of the traction cable passes through the limiting pipe from top to bottom; an installation hole is provided on the transverse plate, the limiting pipe passes through the installation hole from top to bottom, the material of the limiting pipe is iron, the iron attracting sheet is provided with a through hole, the iron attracting sheet is sleeved on the limiting pipe from bottom to top, and the iron attracting sheet is adsorbed on the limiting pipe.

[0014] As a preference, the impact assembly includes a screw rod, a nut, a dropping hammer body, and a plurality of cushion blocks. The upper end of the screw rod is provided with a hanging hole connected to the traction cable, the lower end of the screw rod is connected to the dropping hammer body, the cushion blocks are provided with through holes, the cushion blocks are sleeved on the screw rod and stacked above the dropping hammer body, and the nut is installed on the screw rod and presses above the cushion blocks.

[0015] As a preference, the baffle is an acrylic board.

[0016] As a preference, the threaded fixing pipe is provided with an external thread, the bottom plate of the box body is provided with a threaded hole, and the external thread of the threaded fixing pipe is screwed with the threaded hole of the bottom plate.

[0017] The utility model has the following advantages:

[0018] 1. Adopting a load box structure, the specimen is placed on the bottom plate. Since it is protected by plates around, it can prevent the specimen from breaking and splashing during the test, improving safety; the transparent baffle is convenient for observation; the detachable connection of the baffle is convenient for placing the specimen.

[0019] 2. Using angle steel to achieve the flat-pushing installation and disassembly of the baffle, with a simple structure and convenient operation.

[0020] 3. Adopting a modular spliced guiding rod structure, the number of guiding rods can be determined according to the test height, with strong versatility.

[0021] 4. The structure in an assembled form makes the device convenient for storage and carrying.

[0022] 5. By using a limiting tube, on the one hand, it enables the falling hammer body to maintain a vertical downward movement during the free fall process, so that the falling hammer body can accurately hit the measuring point, improving the accuracy of the experiment; on the other hand, through the combination of the limiting tube and the iron suction sheet for installation and limitation, the structure is simple and easy to install and disassemble.

[0023] 6. By combining a number of cushion blocks with the falling hammer body to form a counterweight, the impact force can be controlled according to the test requirements. The structure is simple, the adjustment is convenient, and the versatility is strong.

[0024] 7. Using acrylic board as the material of the baffle, it has good impact resistance and light transmittance, and does not interfere with the experimenters to observe the experiment. Description of the Drawings

[0025] Figure 1 is a three-dimensional view of the drop hammer impact test device.

[0026] Figure 2 is an exploded view of the drop hammer impact test device.

[0027] Figure 3 is a three-dimensional view of the impact component.

[0028] In the figure, 1, baffle; 2, box body; 3, angle steel; 4, guide rod; 5, transverse plate; 6, traction component; 7, hand crank; 8, screw rod; 9, nut; 10, cushion block; 11, falling hammer body; 12, fixing piece; 13, sliding hole; 14, limiting tube; 15, fixed threaded tube.

[0029] 4-1, threaded connection head; 4-2, threaded connection hole.

[0030] 8-1, hanging hole. Detailed Embodiment

[0031] The following will further describe the present utility model in detail in conjunction with the specific embodiments.

[0032] A drop hammer impact test device includes a load box, a support frame, an impact component, and a traction component; the load box includes a baffle, a box body with an open upper side and a front side, and the transparent baffle is arranged on the front side of the box body and is detachably connected to the box body; the support frame is installed on the bottom plate of the box body, the traction component is installed on the support frame, and the impact component is connected to the traction cable of the traction component.

[0033] The load box further includes a pair of left and right angle steels; the box body includes two side plates, one rear plate, and one bottom plate; the angle steel includes a mutually perpendicular installation section and a vertical section, the installation section is fixed on the outside of the side plate, and a gap for inserting the baffle is left between the vertical section and the front end of the side plate.

[0034] The support frame includes two guide columns and a transverse plate, and the transverse plate is installed between the two guide columns with adjustable height; the guide columns are fixed on the bottom plate of the box body, and the traction assembly is fixed on the transverse plate.

[0035] The guide column includes a threaded fixing pipe and multiple guide rods; the lower end of the guide rod is provided with a threaded connection head, and the upper end is provided with a threaded connection hole; the threaded fixing pipe is fixed on the bottom plate of the box body, the threaded connection head of the lowermost guide rod is screwed with the threaded fixing pipe, and the threaded connection hole of the guide rod is screwed with the threaded connection head of the upper guide rod. In this embodiment, according to the test height requirement, eight guide rods are selected.

[0036] Two sliding holes are provided on the transverse plate, the guide columns pass through the sliding holes, and a fixing member is installed on the transverse plate, and the fixing member locks or loosens the transverse plate and the guide columns. In this embodiment, the fixing member is a locking screw passing through the reserved threaded hole on the transverse plate, and the end of the locking screw laterally presses against the guide column to achieve locking.

[0037] The traction assembly includes a traction frame, a hand crank, a traction shaft, and a traction cable; the traction shaft is rotatably connected to the traction frame, the hand crank is connected to the traction shaft to drive the traction shaft to rotate, one end of the traction cable is fixedly connected to the traction shaft, the middle part is wound around the traction shaft, and the other end is connected to the impact assembly.

[0038] The traction assembly further includes a limit tube and an iron sheet; a vertical limit tube is arranged below the traction frame, and the other end of the traction cable passes through the limit tube from top to bottom; an installation hole is provided on the transverse plate, the limit tube passes through the installation hole from top to bottom, the material of the limit tube is iron, the iron sheet is provided with a through hole, the iron sheet is sleeved on the limit tube from bottom to top, and the iron sheet is adsorbed on the limit tube.

[0039] The impact assembly includes a screw, a nut, a drop hammer body, and several cushion blocks. The upper end of the screw is provided with a hanging hole connected to the traction cable, the lower end of the screw is connected to the drop hammer body, the cushion blocks are provided with through holes, the cushion blocks are sleeved on the screw and stacked above the drop hammer body, and the nut is installed on the screw and pressed above the cushion blocks.

[0040] The baffle is a transparent acrylic board.

[0041] The threaded fixing pipe is provided with an external thread, the bottom plate of the box body is provided with a threaded hole, and the external thread of the threaded fixing pipe is screwed with the threaded hole of the bottom plate.

[0042] The assembly process of the present utility model is as follows:

[0043] Install the threaded fixing pipe on the bottom plate of the box body, and connect the threaded joint of a guiding rod to the threaded fixing pipe to realize the connection between the guiding rod and the threaded fixing pipe. Connect each guiding rod one by one through the cooperation of the threaded joint and the threaded connection hole to complete the assembly of the two guiding columns. Pass the transverse plate through the two guiding columns, place it at a specific height, and then lock it tightly with a fixing member. Insert the limit pipe of the traction assembly into the mounting hole of the transverse plate, put on the iron suction sheet, and clamp the transverse plate from the upper and lower sides by the traction frame and the iron suction sheet to realize the connection between the transverse plate and the traction assembly. Assemble the impact assembly, select the number and weight of the cushion blocks according to the test conditions, install the cushion blocks and then screw in the nuts to lock the cushion blocks between the nuts and the drop hammer body. Connect the lower end of the traction cable to the hanging hole at the upper end of the screw rod.

[0044] The working process of the present utility model is as follows:

[0045] (1) Place the specimen on the bottom plate of the box body and directly below the drop hammer body.

[0046] (2) Insert the baffle into the gap between the angle steel and the side plate of the box body, inserting it from top to bottom to close the front end of the box body.

[0047] (3) Wind up the traction cable upward through the hand crank to lift the drop hammer body to the test position.

[0048] (4) Release the hand crank, and the weighted drop hammer body freely falls in the vertical direction to impact the specimen, thereby obtaining the test result. Since the specimen is protected all around, the broken specimen is prevented from splashing out. Since the baffle is transparent, the test process can be observed in real time.

[0049] During storage, disassemble the impact assembly as a whole, disassemble the traction assembly as a whole, disassemble the transverse plate, disassemble and separate the guiding columns, and disassemble the baffle.

[0050] In addition to the methods mentioned in the above embodiments, the number of guiding rods can be selected according to the falling height of the heavy object, and the number of cushion blocks can be selected according to the impact force required by the test. The threaded fixing pipe can be directly fixed on the bottom plate of the box body, for example, by welding. These transformation methods are all included in the protection scope of the present utility model.

[0051] The above embodiments are the preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present utility model shall be equivalent replacement methods and are all included in the protection scope of the present utility model.

Claims

1. A drop hammer impact test device, characterized in that, It includes a load box, a support frame, an impact component, and a traction component; the load box includes a baffle, a box body that is open on both the upper side and the front side, and a transparent baffle is arranged on the front side of the box body and is detachably connected to the box body; the support frame is installed on the bottom plate of the box body, the traction component is installed on the support frame, and the impact component is connected to the traction cable of the traction component.

2. The drop hammer impact test device according to claim 1, characterized in that: The load box further includes angle steels arranged in pairs on the left and right; the box body includes two side plates, one rear plate, and one bottom plate; the angle steel includes a mounting section and a vertical section that are perpendicular to each other, the mounting section is fixed on the outer side of the side plate, and a gap for inserting the baffle is left between the vertical section and the front end of the side plate.

3. A drop hammer impact test device according to claim 1, characterized in that: The support frame includes two guide columns and a transverse plate, and the transverse plate is installed between the two guide columns with adjustable height; the guide columns are fixed on the bottom plate of the box body, and the traction component is fixed on the transverse plate.

4. A drop hammer impact test device according to claim 3, characterized in that: The guide column includes a threaded fixing pipe and multiple guide rods; the lower end of the guide rod is provided with a threaded connection head, and the upper end is provided with a threaded connection hole; the threaded fixing pipe is fixed on the bottom plate of the box body, the threaded connection head of the lowermost guide rod is screwed with the threaded fixing pipe, and the threaded connection hole of the guide rod is screwed with the threaded connection head of the upper guide rod.

5. The drop hammer impact test device according to claim 3, characterized in that: Two sliding holes are provided on the transverse plate, the guide columns penetrate into the sliding holes, and a fixing piece is installed on the transverse plate, and the fixing piece locks or loosens the transverse plate and the guide columns.

6. A drop hammer impact test device according to claim 3, characterized in that: The traction component includes a traction frame, a hand crank, a traction shaft, and a traction cable; the traction shaft is rotatably connected to the traction frame, the hand crank is connected to the traction shaft to drive the traction shaft to rotate, one end of the traction cable is fixedly connected to the traction shaft, the middle part is wound around the traction shaft, and the other end is connected to the impact component.

7. A drop hammer impact test device according to claim 6, characterized in that: The traction component further includes a limiting pipe and an iron sheet; a vertical limiting pipe is arranged below the traction frame, and the other end of the traction cable passes through the limiting pipe from top to bottom; a mounting hole is provided on the transverse plate, the limiting pipe passes through the mounting hole from top to bottom, the material of the limiting pipe is iron, the iron sheet is provided with a through hole, the iron sheet is sleeved on the limiting pipe from bottom to top, and the iron sheet is adsorbed on the limiting pipe.

8. A drop hammer impact test device according to claim 1, characterized in that: The impact component includes a screw rod, a nut, a falling hammer body, and several cushion blocks. A hanging hole connected to the traction cable is provided at the upper end of the screw rod, the lower end of the screw rod is connected to the falling hammer body, the cushion block is provided with a through hole, the cushion block is sleeved on the screw rod and stacked above the falling hammer body, and the nut is installed on the screw rod and presses above the cushion block.

9. A drop hammer impact test device according to claim 1, characterized in that: The baffle is an acrylic board.

10. A drop hammer impact test device according to claim 4, characterized in that: The threaded fixing pipe is provided with an external thread, the bottom plate of the box body is provided with a threaded hole, and the external thread of the threaded fixing pipe is screwed with the threaded hole of the bottom plate.

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