Drop weight testing machine

Abstract

The utility model belongs to the technical field of testing equipment, and particularly relates to a drop hammer testing machine which comprises a base, a supporting column and a gravity hammer, and a pull-up mechanism is arranged at the top of the supporting column and used for lifting the gravity hammer; the device further comprises an automatic unhooking mechanism and a sample fixing table. The automatic unhooking mechanism is used for enabling the gravity hammer to automatically fall at a set height. The sample fixing table is used for mounting a protector to be measured; the sample fixing table is arranged under the gravity hammer, and the gravity hammer collides with the protector on the sample fixing table when falling off. According to the drop hammer testing machine, the drop height of the gravity hammers can be adjusted by adjusting the installation height of the automatic unhooking mechanism, the number of the gravity hammers is multiple, and the weights of the gravity hammers are different; the replacement can be performed according to actual requirements; the sample fixing table can adopt an inclined plate, and the protector can be impacted at different angles by mounting the protector on the sample fixing table with different inclination angles.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a drop hammer testing machine. Background Technology

[0002] A thread protector (hereinafter referred to as "protector") is a cap or bushing used to protect threaded pipes. Its main function is to protect the threaded ends of pipes or cylinders, preventing damage during transportation and storage. Thread protectors can be classified according to their materials: all-steel, all-plastic, steel-plastic composite, and rubber. Regardless of the material, protectors require a series of tests after production to ensure they provide the expected protection. Impact testing is one of the more important tests. Impact testing of thread protectors is generally conducted using a drop hammer tester; however, existing drop hammer testers are mainly designed for pipes themselves and lack a dedicated drop hammer testing machine for thread protectors. This results in low efficiency and limited versatility when testing thread protectors. Therefore, this application aims to provide a drop hammer testing machine with a simple structure that can conveniently test the impact resistance of thread protectors. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a drop hammer testing machine that can conveniently test the impact resistance of thread protectors and has strong versatility.

[0004] The technical solution of this utility model is: a drop hammer testing machine, including a base, a support column, and a gravity hammer. The support column is vertically arranged above the base, and a lifting mechanism is provided at the top of the support column for lifting the gravity hammer. It also includes an automatic unhooking mechanism and a sample fixing platform. The automatic unhooking mechanism is used to make the gravity hammer fall automatically at a set height. The sample fixing platform is used to install the protector to be measured. The sample fixing platform is located directly below the gravity hammer, and when the gravity hammer falls, it will collide with the protector on the sample fixing platform.

[0005] Furthermore, there are two support pillars, which are set on both sides of the base. Two sliding rods are set between the support pillars, and each sliding rod has a groove; the grooves are set on the opposite sides of the two sliding rods.

[0006] Furthermore, pulleys are provided on both sides of the gravity hammer, and the pulleys are used to engage with the grooves, so that the gravity hammer is restricted to move along the direction of the grooves. A lifting ring is provided at the upper center of the gravity hammer.

[0007] Furthermore, the lifting mechanism can employ an electric hoist or winch structure. Specifically, it mainly includes a drive motor, a drum, a pull rope, and a hook. One end of the pull rope is fixed to the drum, and the other end is connected to the hook. The drive motor rotates the drum, thereby extending and retracting the pull rope, thus enabling the lifting of items.

[0008] Furthermore, the automatic unhooking mechanism is installed on the slide bar. When the lifting mechanism lifts the gravity hammer from below, the automatic unhooking mechanism comes into contact with the hook, which causes the angle of the hook to change, making it impossible for the hook to hook the lifting ring on the gravity hammer.

[0009] Furthermore, the hook includes a main body and a support arm that is perpendicular to the main body; the support arm is located on the side of the hook part of the main body where an opening is provided, and the automatic unhooking mechanism is a stop block provided on the slide bar. The stop block is used to block the end of the support arm, thereby causing the entire hook to tilt.

[0010] Furthermore, the automatic unhooking mechanism is detachably connected to the slide bar, allowing for easy adjustment of the installation height of the automatic unhooking mechanism as needed during use.

[0011] Furthermore, multiple gravity hammers are available, with weight settings including 130kg, 65kg, 35kg, and 20kg. When using the equipment, you can select and install a gravity hammer of appropriate weight according to your actual needs.

[0012] Furthermore, the lower end of the slide bar is higher than the top of the sample fixing stage. This facilitates the replacement and adjustment of the sample fixing stage, as well as the replacement of the gravity hammer.

[0013] Furthermore, the outer surface of the slide bar is marked with graduations. These graduations allow for a clear visual indication of the height of the automatic disengagement mechanism, facilitating more precise adjustment of its position and thus adjusting the drop height of the gravity hammer.

[0014] Furthermore, the sample holder can simply be a flat plate; preferably, it can also be an inclined plate with a specific tilt angle, with cylindrical protrusions on its surface for mounting a protective device. The protective device can be fitted onto the protrusion, positioning it at a specific tilt angle below the gravity hammer for impact testing. Multiple sample holders can be provided, each with a different tilt angle. Alternatively, a movable support rod can be provided on the lower surface of the inclined plate, allowing the tilt angle to be changed by adjusting the position of the support rod. The advantage of this method is that only one inclined plate is needed to accommodate tests at various angles; the disadvantage is that its stability is not as good as an inclined plate with a fixed angle.

[0015] The beneficial effects of this utility model compared with the prior art are as follows:

[0016] 1. The drop hammer testing machine in this application allows for adjustment of the drop height of the gravity hammer by adjusting the installation height of the automatic unhooking mechanism, which is simple and reliable; 2. Multiple gravity hammers are configured, each with a different mass, including 130kg, 65kg, 35kg, and 20kg, which can be replaced according to actual needs; 3. The sample fixing platform can be an inclined plate with protrusions. The protector is fitted onto the protrusions, so that the installation angle of the protector is the same as the tilt angle of the inclined plate. By using inclined plates (sample fixing platforms) with different tilt angles, the protector can receive impacts at different angles. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0018] Figure 2 This is a schematic diagram of the slide rail in Embodiment 1 of this utility model;

[0019] Figure 3 This is a schematic diagram of the gravity hammer in Embodiment 1 of this utility model;

[0020] Figure 4 This is a schematic diagram of the hook in Embodiment 1 of this utility model;

[0021] Figure 5 This is a schematic diagram of the sample fixing stage in Embodiment 1 of this utility model;

[0022] Figure 6 This is a schematic diagram of the state of the gravity hammer when it is unhooked in Embodiment 1 of this utility model;

[0023] In the diagram: 1. Base; 2. Support column; 3. Slide bar; 4. Automatic unhooking mechanism; 5. Sample fixing platform; 51. Protrusion; 6. Gravity hammer; 61. Lifting ring; 62. Pulley; 7. Lifting hook; 71. Main body; 72. Support arm; 8. Pull rope. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to specific embodiments. Methods or functional components not specifically described in the embodiments are all prior art. Unless otherwise defined, all technical terms and scientific terms used herein have the same meaning as commonly understood by those skilled in the art.

[0025] Example 1

[0026] like Figure 1-6As shown, this embodiment is a drop hammer testing machine, including a base 1, a support column 2, and a gravity hammer 6. The support column 2 is vertically arranged above the base 1, and a lifting mechanism is provided at the top of the support column 2 for lifting the gravity hammer 6. It also includes an automatic unhooking mechanism 4 and a sample fixing platform 5. The automatic unhooking mechanism 4 is used to make the gravity hammer 6 fall automatically at a set height. The sample fixing platform 5 is used to install the protector to be measured. The sample fixing platform 5 is located directly below the gravity hammer 6, and when the gravity hammer 6 falls, it will collide with the protector on the sample fixing platform 5.

[0027] In this embodiment, there are two support columns 2, which are arranged on both sides of the base 1. Two sliding rods 3 are arranged between the support columns 2, each with a groove; the grooves are located on opposite sides of the sliding rods 3. Pulleys 62 are arranged on both sides of the gravity hammer 6, and the pulleys 62 cooperate with the grooves, thus restricting the movement of the gravity hammer 6 along the groove direction. A lifting ring 61 is arranged at the upper center of the gravity hammer 6.

[0028] In this embodiment, the lifting mechanism can be an electric hoist. Specifically, it mainly includes a drive motor, a drum, a pull rope 8, and a hook 7. One end of the pull rope 8 is fixed to the drum, and the other end is connected to the hook 7. The drive motor drives the drum to rotate, thereby realizing the extension and retraction of the pull rope 8. The hook 7 hooks the object, thus realizing the lifting of the item. The hook 7 includes a main body 71 and a support arm 72 that is perpendicular to the main body 71; and the support arm 72 is located on one side of the hook opening of the main body 71.

[0029] In this embodiment, the automatic unhooking mechanism 4 is mounted on the slide rod 3. When the lifting mechanism lifts the gravity hammer 6 from below, the automatic unhooking mechanism 4 comes into contact with the hook 7, causing the angle of the hook 7 to change, preventing the hook 7 from hooking the lifting ring 61 on the gravity hammer 6. More specifically, the automatic unhooking mechanism 4 and the slide rod 3 can be connected by a threaded structure, that is, multiple threaded holes of different heights are provided on the slide rod 3, and the automatic unhooking mechanism 4 can be installed at a threaded hole of a certain height. In this embodiment, the automatic unhooking mechanism 4 is a stop block mounted on the slide rod 3, which is used to block the end of the support arm 72, thereby causing the hook 7 to tilt as a whole.

[0030] In this embodiment, multiple gravity hammers 6 are provided, with weight settings including 130kg, 65kg, 35kg, and 20kg. During use, a gravity hammer of appropriate weight can be selected and installed according to actual needs.

[0031] In this embodiment, the lower end of the slide bar 3 is higher than the top of the sample fixing stage 5. This allows the sample fixing stage 5 to be easily replaced and its position adjusted at any time, and also facilitates the replacement of the gravity hammer 6.

[0032] In this embodiment, a scale can be set on the outer surface of the slide bar 3. By observing the scale, the height of the automatic unhooking mechanism 4 can be intuitively understood, which facilitates precise adjustment of the position of the automatic unhooking mechanism 4, thereby adjusting the drop height of the gravity hammer 6.

[0033] In this embodiment, the sample fixing stage 5 can be a flat plate or an inclined plate with a specific tilt angle. A cylindrical protrusion 51 is provided on the surface of the inclined plate. This protrusion 51 is used to install and fix a protective device; that is, the protective device can be fitted onto the protrusion 51, so that the protective device is placed below the gravity hammer 6 at a specific tilt angle for impact testing. In this embodiment, multiple sample fixing stages 5 are provided, and each sample fixing stage 5 has a different tilt angle.

[0034] In this embodiment, the working principle of the drop hammer tester is as follows: The automatic release mechanism 4 is installed at the test height. The hook 7 hooks the lifting ring 61 above the selected drop hammer 6. First, the electric hoist is used to lift the drop hammer 6 below the test height. Then, a suitable sample fixing platform 5 is selected and placed directly below the drop hammer 6. The protector is installed on the sample fixing platform 5. The electric hoist continues to lift the drop hammer 6. When the outer end of the support arm 72 of the hook 7 contacts the automatic release mechanism 4, the outer end of the support arm 72 is blocked and no longer rises. However, under the action of the pull rope 8, the other side of the hook 7 will continue to rise, causing the hook 7 to gradually tilt towards the support arm 72. When it tilts to a certain angle, the lifting ring 61 on the drop hammer 6 will slide out of the hook 7, and the drop hammer 6 will fall, impacting the protector. Figure 6 As shown.

[0035] The above are only some embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various combinations and modifications of the aforementioned technical features. Any improvements, modifications, equivalent substitutions, or applications of the structure or method of the present utility model to other fields to achieve the same effect without departing from the spirit and scope of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A drop hammer testing machine, comprising a base, a support column, and a gravity hammer, wherein the support column is vertically arranged above the base, and a lifting mechanism is provided at the top of the support column for lifting the gravity hammer; characterized in that: It also includes an automatic unhooking mechanism and a sample fixing platform. The automatic unhooking mechanism is used to make the gravity hammer fall automatically at a set height. The sample fixing platform is used to install the protector to be measured. The sample fixing platform is located directly below the gravity hammer, so that when the gravity hammer falls, it will collide with the protector on the sample fixing platform.

2. The drop weight testing machine according to claim 1, characterized in that: There are two support pillars, which are set on both sides of the base. Two sliding rods are set between the support pillars, and each sliding rod has a groove; the grooves are set on the opposite sides of the two sliding rods.

3. The drop weight testing machine according to claim 2, characterized in that: The gravity hammer is provided with pulleys on both sides, and the pulleys are used to cooperate with the groove, so that the gravity hammer is restricted to move along the groove direction.

4. The drop weight testing machine according to claim 1, characterized in that: The lifting mechanism uses an electric hoist, which includes a drive motor, a drum, a pull rope, and a hook. One end of the pull rope is fixed to the drum, and the other end of the pull rope is connected to the hook.

5. The drop weight testing machine according to claim 4, characterized in that: The automatic unhooking mechanism is mounted on the slide bar. When the lifting mechanism lifts the gravity hammer from below, the automatic unhooking mechanism comes into contact with the hook, which causes the angle of the hook to change, making it impossible for the hook to hook the gravity hammer.

6. The drop weight testing machine according to claim 5, characterized in that: The hook includes a main body and a support arm that is perpendicular to the main body; the support arm is located on one side of the opening of the hook part of the main body, and the automatic unhooking mechanism is a stop block set on the slide bar. The stop block is used to block the end of the support arm, thereby causing the hook to tilt as a whole.

7. The drop weight testing machine according to claim 5, characterized in that: The automatic unhooking mechanism is detachably connected to the slide bar, allowing for easy adjustment of the installation height of the automatic unhooking mechanism as needed during use.

8. The drop weight testing machine according to claim 1, characterized in that: Multiple gravity hammers are provided, and the weight settings for the gravity hammers include 130kg, 65kg, 35kg and 20kg.

9. The drop weight testing machine according to claim 2, characterized in that: The lower end of the slide bar is higher than the sample fixing stage.

10. The drop weight testing machine according to claim 2, characterized in that: The outer surface of the slide bar is provided with a scale.

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