Drop hammer impact test device

Abstract

The utility model discloses a drop hammer impact test device which comprises a base, a lifting mechanism and a control host, the lifting mechanism is arranged on the base, the control host is electrically connected with the lifting mechanism, and the lifting mechanism comprises a drop hammer guide cylinder, a rope guide cylinder, a lifting motor, a winding drum, a pull rope and an electromagnet. Each of the drop hammer guide cylinder and the rope guide cylinder is formed by detachably connecting a plurality of cylinder bodies, the drop hammer guide cylinder and the rope guide cylinder are fixed on the base, the lifting motor is arranged in the base and connected with the winding drum, one end of the pull rope is fixed and wound on the winding drum, and the other end of the pull rope is connected with the lifting motor. The other end of the pull rope penetrates into the drop hammer guide cylinder along the rope guide cylinder and is fixedly connected with an electromagnet arranged in the drop hammer guide cylinder, an impact hammer is arranged below the electromagnet, and a test bed is arranged in the base. According to the utility model, the drop hammer guide cylinder and the rope guide cylinder are configured into a plurality of sections of detachable cylinder bodies, so that the height can be adjusted according to the floor height of a test site, the device is flexibly suitable for sites with different floor heights, and the application range and the impact height adjusting range are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of impact test devices, in particular to a drop hammer impact test device. Background Art

[0002] The drop hammer impact tester is suitable for measuring the external impact resistance of various pipes (PVC-U water pipes, sewage pipes, low-pressure water pipes, low-pressure water pipes, core foam pipes, double-wall corrugated pipes, and PE water pipes) and sheet materials, including rigid plastic sheet materials. During the test, the drop hammer is first raised to a certain height and then dropped freely from a height. The impact energy generated by the drop impacts the specimen, and the specimen is then tested to obtain the required data.

[0003] The height of the drop hammer guide tube or guide rod of the existing drop hammer impact tester is fixed at the factory, which limits the applicable test site. That is, the floor height of the test site must be greater than the overall height of the guide tube or guide rod of the hammer impact tester, otherwise the hammer impact tester cannot be assembled for testing. As a result, the application range of the drop hammer impact tester is narrow, and the maximum height of the drop hammer is also limited and cannot be adjusted. Utility Model Content

[0004] The main purpose of the present invention is to overcome the defects of the above-mentioned background technology and provide a drop hammer impact test device.

[0005] To achieve the above-mentioned purpose, the drop hammer impact test device proposed by the present invention includes a base, a lifting mechanism and a control host, the base is a rectangular box structure, the lifting mechanism is arranged on the base, the control host is electrically connected to the lifting mechanism, the lifting mechanism includes a drop hammer guide cylinder, a rope guide cylinder, a lifting motor, a drum, a pull rope and an electromagnet, the drop hammer guide cylinder and the rope guide cylinder are both composed of a plurality of cylinder sections that are detachably connected, the drop hammer guide cylinder and the rope guide cylinder are both vertically fixed on the top surface of the base and connected to the interior of the base, the top of the drop hammer guide cylinder is connected to the top of the rope guide cylinder through a connecting box, the lifting motor is arranged in the base, the output end of the lifting motor is connected to the drum, one end of the pull rope is fixed and wound on the drum, the other end of the pull rope passes through the rope guide cylinder into the connecting box, enters the drop hammer guide cylinder and is fixedly connected to the electromagnet arranged in the drop hammer guide cylinder, an impact hammer is arranged below the electromagnet, and a test bench corresponding to the drop hammer guide cylinder is provided in the base. During the experiment, the electromagnet is energized to generate magnetic force to attract the impact hammer, and then the lifting motor drives the reel to rotate. The reel reels in the rope to pull the electromagnet and the impact hammer up at the same time. When it rises to the set height, the electromagnet is de-energized and the impact hammer falls freely to impact the test pipe below, completing the impact test. By configuring the drop hammer guide cylinder and the rope guide cylinder as several sections of detachable cylinders that are connected to each other, the drop hammer impact test device can be adjusted according to the floor height of the test site, and can be flexibly applied to sites with different floor heights, thereby increasing the scope of application.

[0006] To further optimize the technical solution, flanges are provided at both ends of the cylinder, and two adjacent cylinder sections are detachably connected via the flanges. Multiple cylinders can be docked and fixed using the flanges and bolts to adjust the height of the entire drop weight guide cylinder or rope guide cylinder.

[0007] To further optimize the technical solution, an entrance and exit is provided on the cylinder at the bottom end of the drop hammer guide cylinder, and a closed door is provided at the entrance and exit. The entrance and exit facilitates the removal of the impact hammer, the replacement of the weight on the impact hammer, and the adjustment of the overall weight of the drop hammer.

[0008] A further optimized technical solution features a connecting block between the drop hammer guide cylinder and the base. A gate is defined in the sidewall of the connecting block, and a gate plate is movably positioned at the gate. A push-pull rod is connected to one end of the gate plate. The push-pull rod drives the gate plate to move within the gate. When the impact hammer rebounds after impacting the test pipe, the gate plate quickly extends to block the hammer's subsequent impact, ensuring accurate test results for the test pipe.

[0009] To further optimize the technical solution, a first fixed pulley set and a second fixed pulley set are provided within the connection box. The first fixed pulley set corresponds to the rope guide cylinder, and the second fixed pulley set corresponds to the drop weight guide cylinder. The first and second fixed pulley sets ensure that the pull rope remains parallel to the inner walls of the rope guide cylinder and the drop weight guide cylinder after changing direction, and does not scrape the side walls of the cylinder.

[0010] To further optimize the technical solution, a control circuit board is provided in the base, the lifting motor is electrically connected to the control circuit board, the control host is electrically connected to the control circuit board, and the electromagnet is electrically connected to the control circuit board via a cable.

[0011] Further optimizing the technical solution, the reel is divided into a wire winding area and a pull cord winding area. The pull cord is wound on the pull cord winding area, and the middle part of the cable is wound on the wire winding area. By winding the cables synchronously on the reel, the cables are prevented from being scattered randomly in the base and easily broken by being pulled.

[0012] To further optimize the technical solution, the first fixed pulley group and the second fixed pulley group are respectively provided with two sets of fixed pulleys, and the middle parts of the pull rope and the cable are respectively passed around the fixed pulleys.

[0013] To further optimize the technical solution, a travel switch and a laser ranging sensor are respectively provided at the top position of the drop hammer guide cylinder in the connection box, and the travel switch and the laser ranging sensor are both communicatively connected to the control circuit board.

[0014] To further optimize the technical solution, the test bench includes a lifting plate, a lifting screw and an experimental fixture, the experimental fixture is arranged on the lifting plate, and the lifting screw is provided with two groups, the two groups of lifting screws can be rotatably vertically arranged in the base, the two ends of the lifting plate are respectively sleeved on the middle part of the lifting screw, and a transmission shaft is provided at the bottom between the two groups of lifting screws, the two ends of the transmission shaft are respectively connected to the two groups of lifting screws through two groups of bevel gear groups, and the top of one group of lifting screws extends to the outside of the base and is provided with a hand wheel.

[0015] The beneficial effects of the present invention include: by configuring the drop hammer guide cylinder and the rope guide cylinder as a plurality of detachable cylinder sections connected to each other, the drop hammer impact test device can be adjusted according to the floor height of the test site, flexibly applicable to sites with different floor heights, increasing the applicable scope of the device, and adjusting the maximum lifting height of the impact hammer, thereby adjusting the impact height range. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of the drop hammer impact test device in an embodiment of the present utility model.

[0017] Figure 2 It is a schematic diagram of the test device in the embodiment of the utility model after removing the drop hammer guide cylinder, rope guide cylinder, base and connection box.

[0018] Figure 3 It is a schematic diagram of a test bench in an embodiment of the present invention.

[0019] Figure 4 It is a schematic diagram of the cylinder in the embodiment of the present utility model.

[0020] Figure 5 It is a schematic diagram of the connecting block in the embodiment of the present utility model.

[0021] Figure 6 It is a schematic diagram of the interior of the connection box in an embodiment of the present utility model.

[0022] Figure numerals: 1 base; 2 control host; 3 drop hammer guide cylinder; 4 rope guide cylinder; 5 lifting motor; 501 reducer; 6 reel; 601 wire winding area; 602 pull rope winding area; 7 pull rope; 8 electromagnet; 9 connection box; 901 first fixed pulley group; 902 second fixed pulley group; 903 limit switch; 904 laser ranging sensor; 10 impact hammer; 11 test bench; 1101 lifting plate; 1102 lifting screw rod; 1103 experimental fixture; 1104 transmission shaft; 1105 bevel gear group; 1106 hand wheel; 12 flange; 13 entrance and exit; 14 closed door; 15 connection block; 16 gate; 17 gate; 18 push-pull rod; 19 control circuit board; 20 cable. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and circuit connection.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0027] See also Figures 1 to 6In one embodiment, a drop hammer impact test device disclosed includes a base 1, a lifting mechanism and a control host 2. The base 1 is a rectangular box structure. The lifting mechanism is arranged on the base 1. The control host 2 is electrically connected to the lifting mechanism; the lifting mechanism includes a drop hammer guide cylinder 3, a rope guide cylinder 4, a lifting motor 5, a drum 6, a pull rope 7 and an electromagnet 8. The drop hammer guide cylinder 3 and the rope guide cylinder 4 are both composed of a plurality of detachable cylinder sections. The drop hammer guide cylinder 3 and the rope guide cylinder 4 are both vertically fixed on the top surface of the base 1 and are connected to the interior of the base 1. The drop hammer guide cylinder 3 and the rope guide cylinder 4 are vertically fixed on the top surface of the base 1 and are connected to the interior of the base 1. The top of the cylinder 3 is connected to the top of the rope guide cylinder 4 through the connecting box 9. The lifting motor 5 is arranged inside the base 1. The output end of the lifting motor 5 is connected to the drum 6. One end of the pull rope 7 is fixed and wound on the drum 6. The drum 6 is located directly below the rope guide cylinder 4. The other end of the pull rope 7 passes through the connecting box 9 along the rope guide cylinder 4 and then enters the drop hammer guide cylinder 3 and is fixedly connected to the electromagnet 8 provided in the drop hammer guide cylinder 3. An impact hammer 10 is provided below the electromagnet 8, and a test bench 11 corresponding to the drop hammer guide cylinder 3 is provided in the base 1. Specifically, the drop hammer guide cylinder 3 is made of a non-magnetic stainless steel tube to prevent the electromagnet 8 from being adsorbed on the side wall of the drop hammer guide cylinder 3 when it is energized to generate magnetic force, and being unable to attract the impact hammer 10 and pull it to lift. A reducer 501 is provided between the lifting motor 5 and the reel 6. The lifting motor 5 is preferably a stepper motor or a servo motor to facilitate precise control of the speed and position. The interior of the base 1 is divided into a front half and a rear half. The lifting motor 5 and the reel 6 are arranged in the rear half, and the test bench 11 is arranged in the front half. Both the front half and the rear half are provided with a switch door, which is convenient for opening and placing the pipe to be tested on the test bench 11, and closing the switch door for protection during the test to prevent the pipe from flying out during the impact test. In this embodiment, by configuring the drop hammer guide cylinder 3 and the rope guide cylinder 4 as a plurality of sections of detachable cylinders connected to each other, the drop hammer impact test device can be adjusted according to the floor height of the test site, and can be flexibly applied to sites with different floor heights, thereby increasing the applicable scope of the device, and adjusting the maximum lifting height of the impact hammer 10, thereby adjusting the impact height range; during the experiment, the electromagnet 8 is energized to generate magnetic force to attract the impact hammer 10, and then the lifting motor 5 drives the drum 6 to rotate, and the drum 6 reels in the pull rope 7 to pull the electromagnet 8 and the impact hammer 10 to rise at the same time. When it rises to the set height, the electromagnet 8 is de-energized and the impact hammer 10 falls freely to impact the test pipe below, completing the impact experiment.

[0028] In the specific example, flanges 12 are provided at both ends of the cylinder, and the upper and lower adjacent cylinder sections are detachably connected via the flanges 12. Specifically, based on the floor height of the test site, multiple cylinders are docked and fixed via the flanges 12 to adjust the height of the entire drop weight guide cylinder 3 or rope guide cylinder 4. The lowest cylinder is connected to the base 1 below via the flange 12, and the topmost cylinder is connected to the bottom of the connection box 9 above via the flange 12.

[0029] In a preferred embodiment, an access door 13 is provided on the cylinder at the bottom end of the drop hammer guide cylinder 3, and a closed door 14 is provided at the access door 13. Access door 13 facilitates removal of the impact hammer 10 and replacement of the weights thereon. The closed door 14 is closed during experiments. The closed door 14 can be made of a transparent, impact-resistant plastic material, such as an impact-resistant acrylic sheet, to facilitate observation of the interior of the drop hammer guide cylinder 3.

[0030] In a preferred embodiment, a connecting block 15 is provided between the drop hammer guide cylinder 3 and the base 1. The connecting block 15 is fixed to the base 1. A gate 16 connected to the central channel is provided on the side wall of the connecting block 15. A gate plate 17 is movably provided at the gate 16, and one end of the gate plate 17 is connected to a push-pull rod 18. Specifically, the push-pull rod 18 can be an electric push rod, a hydraulic rod, or a pneumatic rod. The push-pull rod 18 drives the gate plate 17 to move left and right at the gate 16, thereby closing or opening the channel between the drop hammer guide cylinder 3 and the base 1. When the impact hammer 10 falls and impacts the test pipe and rebounds, the gate plate 17 can be quickly extended to prevent the impact hammer 10 from impacting the test pipe again, thereby ensuring the accuracy of the test results of the test pipe.

[0031] In a preferred embodiment, a first fixed pulley set 901 and a second fixed pulley set 902 are provided within the connection box 9. The first fixed pulley set 901 corresponds to the rope guide drum 4, and the second fixed pulley set 902 corresponds to the drop weight guide drum 3. The provision of the first fixed pulley set 901 and the second fixed pulley set 902 ensures that the pull rope 7 remains parallel to the rope guide drum 4 and the drop weight guide drum 3 even when changing direction, and does not scrape against the side walls of the drum, causing wear and affecting the traction of the pull rope.

[0032] In the specific example, a control circuit board 19 is further provided in the base 1. The lifting motor 5 is electrically connected to the control circuit board 19, the control host 2 is electrically connected to the control circuit board 19, and the electromagnet 8 is electrically connected to the control circuit board 19 via a cable 20. The control circuit board 19 controls the operation of the lifting motor 5 and the power on and off of the electromagnet 8.

[0033] In a preferred embodiment, the reel 6 is separated into a wire winding area 601 and a drawstring winding area 602. The drawstring 7 is wound on the drawstring winding area 602, and the middle portion of the cable 20 is wound on the wire winding area 601. Winding the cable 20 on the reel 6 prevents the cable 20 from being scattered randomly in the base 1.

[0034] In a preferred embodiment, two sets of fixed pulleys are respectively provided on the first fixed pulley set 901 and the second fixed pulley set 902, and the middle portions of the pull rope 7 and the cable 20 are respectively passed around the fixed pulleys. Specifically, two fixed pulleys are coaxially provided on the rotating shafts of the first fixed pulley set 901 and the second fixed pulley set 902. The two fixed pulleys on the same side of the first fixed pulley set 901 and the second fixed pulley set 902 are used for the pull rope 7 to pass around, thereby changing the direction of the pull rope 7 and preventing it from scraping the side walls of the drop weight guide cylinder 3 and the rope guide cylinder 4. The two fixed pulleys on the other side are used for the cable 20 to pass around, preventing the cable 20 from being scattered.

[0035] In a preferred embodiment, a limit switch 903 and a laser distance sensor 904 are respectively provided within the connection box 9 at the top of the drop hammer guide cylinder 3. Both the limit switch 903 and the laser distance sensor 904 are in communication with the control circuit board 19. The limit switch 903 limits the upper limit of the pull rope 7 pulling the electromagnet 8, improving safety. The laser distance sensor 904 detects the distance between the electromagnet 8 and the connection box 9 and feeds this information back to the control circuit board 19. After signal processing by the control circuit board 1, it is fed back to the control host 2 to provide real-time feedback on the height of the impact hammer 10 currently attracted by the electromagnet 8.

[0036] In a preferred embodiment, the test bench 11 includes a lifting plate 1101, a lifting screw 1102 and an experimental fixture 1103. The experimental fixture 1103 is arranged on the lifting plate 1101. There are two groups of lifting screws 1102. The two groups of lifting screws 1102 can be rotatably arranged vertically in the base 1. The two ends of the lifting plate 1101 are respectively sleeved on the middle part of the lifting screw 1102. A transmission shaft 1104 is provided at the bottom between the two groups of lifting screws 1102. The two ends of the transmission shaft 1104 are respectively connected to the two groups of lifting screws 1102 through two groups of bevel gear groups 1105. The top of one group of lifting screws 1102 extends to the outside of the base 1 and is provided with a hand-cranked wheel 1106. Specifically, the bevel gear set 1105 is a bevel gear set on the lifting screw 1102, and the other is set on the transmission shaft 1104. The two bevel gears are meshed and connected with each other, and are used for transmission between the two lifting screws 1102 and the cross axis of the transmission shaft 1104, so that the two lifting screws 1102 can rotate synchronously to drive the lifting plate 1101 to move up and down. The experimental fixture 1103 is used to place the pipe to be tested. By rotating the hand wheel 1106 to drive the experimental fixture 1103 to move up and down, the height position of the pipe to be tested can be adjusted to be suitable for impact testing of pipes with different diameters, thereby increasing applicability.

[0037] The above content is a further detailed description of the present invention in conjunction with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, they can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be considered to belong to the scope of protection of the present invention. In the description of this specification, the reference terms "one embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples" or "some examples" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in an appropriate manner in any one or more embodiments or examples. In the absence of mutual contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and alterations can be made herein without departing from the scope of protection of the patent application.

Claims

1. A drop hammer impact test device, comprising a base, a lifting mechanism, and a control host, wherein the base is a rectangular box structure, the lifting mechanism is disposed on the base, and the control host is electrically connected to the lifting mechanism; characterized in that: The lifting mechanism includes a drop hammer guide cylinder, a rope guide cylinder, a lifting motor, a drum, a pull rope and an electromagnet. The drop hammer guide cylinder and the rope guide cylinder are both composed of several detachably connected cylinder sections. The drop hammer guide cylinder and the rope guide cylinder are both vertically fixed on the top surface of the base and communicated with the interior of the base. The top of the drop hammer guide cylinder is communicated with the top of the rope guide cylinder through a connecting box. The lifting motor is arranged in the base, and the output end of the lifting motor is connected to the drum. One end of the pull rope is fixed and wound on the drum, and the other end of the pull rope passes through the connecting box along the rope guide cylinder and enters the drop hammer guide cylinder and is fixedly connected to the electromagnet arranged in the drop hammer guide cylinder. An impact hammer is arranged under the electromagnet, and a test bench corresponding to the drop hammer guide cylinder is provided in the base.

2. The drop weight impact test device according to claim 1, wherein: Both ends of the cylinder are provided with flanges, and the two upper and lower adjacent sections of the cylinder are detachably connected via the flanges.

3. The drop weight impact test device according to claim 2, wherein: An entrance and an exit are provided on the cylinder body at the bottom end of the drop hammer guide cylinder, and a closed door is provided at the entrance and an exit.

4. The drop weight impact test device according to claim 3, wherein: A connecting block is provided between the drop hammer guide cylinder and the base, a gate is provided on the side wall of the connecting block, a gate plate is movably provided at the gate, and one end of the gate plate is connected to a push-pull rod.

5. The drop weight impact test device according to claim 4, wherein: A first fixed pulley group and a second fixed pulley group are provided in the connection box. The first fixed pulley group corresponds to the rope guide cylinder, and the second fixed pulley group corresponds to the drop hammer guide cylinder.

6. The drop weight impact test device according to claim 5, characterized in that: A control circuit board is provided in the base, the lifting motor is electrically connected to the control circuit board, the control host is electrically connected to the control circuit board, and the electromagnet is electrically connected to the control circuit board via a cable.

7. The drop weight impact test device according to claim 6, wherein: The drum is divided into a wire winding area and a pull rope winding area, the pull rope is wound on the pull rope winding area, and the middle part of the cable is wound on the wire winding area.

8. The drop weight impact test device according to claim 7, wherein: The first fixed pulley group and the second fixed pulley group are respectively provided with two sets of fixed pulleys, and the middle parts of the pull rope and the cable are respectively passed around the fixed pulleys.

9. The drop weight impact test device according to claim 8, characterized in that : A travel switch and a laser ranging sensor are respectively provided at the top position of the drop hammer guide cylinder in the connection box, and the travel switch and the laser ranging sensor are both communicatively connected to the control circuit board.

10. The drop weight impact test device according to claim 9, wherein: The test bench includes a lifting plate, a lifting screw and an experimental fixture. The experimental fixture is arranged on the lifting plate. There are two groups of lifting screws. The two groups of lifting screws can be rotatably vertically arranged in the base. The two ends of the lifting plate are respectively sleeved on the middle part of the lifting screw. A transmission shaft is provided at the bottom between the two groups of lifting screws. The two ends of the transmission shaft are respectively connected to the two groups of lifting screws through two groups of bevel gear groups. The top end of one group of lifting screws extends to the outside of the base and is provided with a hand wheel.

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