Trackless free drop hammer automatic test system

Abstract

The invention relates to a trackless free-drop hammer automatic test system. The system comprises a frame; the explosion box is used for containing a metal test piece, a first through hole is formed in the top of the explosion box, and the explosion box is arranged at the bottom of the frame; a hammer body; the hammer body positioning device comprises a positioning piece and a first moving device, the positioning piece is used for positioning the hammer body, the first moving device is connected with the positioning piece and can drive the positioning piece to move between a first position and a second position, the positioning piece is used for positioning the hammer body right above the first through hole at the first position, and the positioning piece is used for positioning the hammer body right above the second through hole at the second position. The positioning piece and the first through hole are spaced in the horizontal direction; and the hammer releasing device is arranged on the frame and located above the explosion box, the hammer releasing device comprises a second moving device and a hammer releasing device, the second moving device can drive the hammer releasing device to move, and the hammer releasing device is used for fixing and releasing a hammer body. Therefore, according to the trackless free drop hammer automatic test system, the test efficiency can be improved, and the safety is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing of metal materials for coal mines, and particularly relates to a trackless free-falling hammer automatic test system. BACKGROUND

[0002] The principle of the free-falling hammer test is to make a test specimen of a tested metal material, to lift the falling hammer with the test specimen to a specified height and to freely fall according to actual working condition parameters of an instrument or equipment represented by the tested material. The falling hammer impacts a friction test plate to simulate the occurrence of friction sparks of the tested material under the free-falling working condition. In the related art, the free-falling hammer test device is manually realized by manpower, which is high in working strength and low in test efficiency, and cannot meet the test frequency with high frequency and high strength. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, an embodiment of the present application provides a trackless free-falling hammer automatic test system.

[0004] The trackless free-falling hammer automatic test system according to an embodiment of the present application comprises: a frame; an explosion box for accommodating a metal test specimen, the explosion box having a first through hole at the top thereof, and the explosion box being arranged at the bottom of the frame; a hammer body; a hammer body positioning device, the hammer body positioning device comprising a positioning member and a first moving device, the positioning member being used for positioning the hammer body, and the first moving device being connected with the positioning member and capable of moving the positioning member between a first position and a second position, in the first position, the positioning member is used for positioning the hammer body directly above the first through hole, and in the second position, the positioning member is spaced apart from the first through hole in the horizontal direction; a hammer releasing device, the hammer releasing device being arranged on the frame and located above the explosion box, the hammer releasing device comprising a second moving device and a hammer releasing device, the second moving device being capable of moving the hammer releasing device, and the hammer releasing device being used for fixing and releasing the hammer body.

[0005] Therefore, the trackless free-falling hammer automatic test system according to the embodiment of the present application can improve the test efficiency and is high in safety.

[0006] In some embodiments, the positioning member is a positioning rack, the top of the positioning rack is open and used for placing the hammer body, and the first moving device is capable of moving the positioning rack between the first position and the second position.

[0007] In some embodiments, the trackless free-falling hammer automatic test system further comprises a hammer feeding device, the hammer feeding device comprises a guide rail and an electric hoist, the guide rail extends along a first direction, the guide rail is fixed on the top of the frame, one end of the guide rail extends out of the frame, the electric hoist is movably arranged on the guide rail along the first direction, and the electric hoist is used to move the hammer body. The first moving device can drive the positioning frame to move in the first direction, and the electric hoist can move the hammer body to the positioning frame located at the second position.

[0008] In some embodiments, the hammer releasing device comprises an electromagnetic hammer releasing device, the electromagnetic hammer releasing device can use magnetic force to fix the hammer body; The second moving device comprises a guide column extending along an up-down direction, the guide column is connected with the frame; a sliding seat movably arranged along the up-down direction and connected with the guide column, the sliding seat is connected with the hammer releasing device; a wire wheel, a rope on the wire wheel is connected with the sliding seat; a lifting motor arranged on the top of the frame and connected with the wire wheel, the lifting motor drives the wire wheel to rotate so as to drive the sliding seat and the hammer releasing device on the sliding seat to move in the up-down direction.

[0009] In some embodiments, the hammer releasing device is located directly above the first through hole; When the electromagnetic hammer releasing device is powered off, the electromagnetic hammer releasing device can use magnetic force to attract the hammer body, and when the electromagnetic hammer releasing device is powered on, the electromagnetic hammer releasing device can release the hammer body.

[0010] In some embodiments, the trackless free-falling hammer automatic test system further comprises a paper sealing device, the paper sealing device comprises a releasing drum, the releasing drum is used to install a sealing paper roll, and sealing paper unrolled from the sealing paper roll is used to seal the first through hole; a guide cylinder, the guide cylinder is used to guide the unrolled sealing paper; a driving drum, the driving drum is used to roll up the unrolled sealing paper; a pressing ring, the pressing ring is located on the upper side of the explosion box and annularly arranged outside the first through hole, and the pressing ring is used to press the sealing paper on the top of the explosion box. In some embodiments, a working platform located above the explosion box is arranged on the frame; The working platform has a second through hole located directly above the first through hole, and the hammer body can sequentially pass through the second through hole and the first through hole downward into the explosion box; The pressing ring is located below the working platform, the working platform is provided with a third moving device, the third moving device is connected with the pressing ring and can drive the pressing ring to move in the up-down direction, a guide rod is arranged on the pressing ring, and the guide rod is slidably connected with the working platform in the up-down direction; The hammer positioning device is arranged above the working platform.

[0011] In some embodiments, the trackless free-fall hammer automatic test system further comprises an exhaust device, the exhaust device comprises An exhaust pipe, an inlet of the exhaust pipe is arranged above the explosion box and adjacent to the first through hole; An exhaust fan, the exhaust fan is connected with the exhaust pipe and can exhaust air through the exhaust pipe; A supply pipe, an outlet of the supply pipe is in communication with the cavity of the explosion box; A supply fan, the supply fan is connected with the supply pipe to supply air to the cavity of the explosion box.

[0012] In some embodiments, the frame comprises a bottom plate, a top plate and a plurality of support columns, the support columns are connected in the up-down direction, the thickness direction of each of the bottom plate and the top plate is the up-down direction, the bottom plate is connected with the bottom of the plurality of support columns, and the top plate is connected with the upper part of the plurality of support columns; The explosion box is arranged on the bottom plate, at least part of the side of the frame is provided with a protective plate, and at least part of the plurality of support columns are connected through a cross brace; The explosion box is provided with a first air inlet, the first air inlet is used for introducing combustible gas into the cavity of the explosion box, and the outside of the explosion box is provided with a concentration display instrument, the concentration display instrument is used for displaying the concentration of the combustible gas in the cavity of the explosion box; The explosion box comprises a first side plate and a second side plate facing away in a first direction and a third side plate and a fourth side plate facing away in a second direction; The first side plate is provided with a test piece inlet, the first side plate is provided with a box door, the frame is provided with a closing cylinder hinged thereto, the extending rod of the closing cylinder is hinged to the box door, the extending rod of the closing cylinder extends outward so that the box door covers the test piece inlet, the first side plate is provided with a pressing cylinder, and the extending rod of the pressing cylinder extends so as to fix the box door; The unwinding drum is arranged on the third side plate, the driving drum is arranged on the fourth side plate, and the top of the third side plate and the fourth side plate is provided with the guide cylinder; The explosion box is provided with a test table for placing a metal test piece, and the explosion box is provided with a fourth moving device connected with the test table, which is used to drive the test table to move horizontally.

[0013] In some embodiments, the top of the hammer body is provided with a connecting piece, the hammer placing device comprises a fifth moving device, the fifth moving device can drive the push plate to be clamped with the connecting piece of the hammer body, so as to prevent the hammer body from falling; and / or The outer side of the hammer body is provided with a copper protective layer; and / or The upper part of the hammer body is provided with a cavity; and / or The outer diameter of at least part of the lower part of the hammer body decreases downward; and / or The bottom of the hammer body is provided with an impact block. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of a trackless free-falling hammer automatic test system according to an embodiment of the present application.

[0015] Figure 2 It is a perspective view of a trackless free-falling hammer automatic test system according to an embodiment of the present application.

[0016] Figure 3 It is an internal schematic diagram of a trackless free-falling hammer automatic test system according to an embodiment of the present application.

[0017] Figure 4 It is a schematic diagram of a first moving device and a third moving device according to an embodiment of the present application.

[0018] Figure 5 It is a sectional view of a positioning frame and a hammer body according to an embodiment of the present application.

[0019] Figure 6 It is a schematic diagram of a hammer body according to an embodiment of the present application.

[0020] Figure 7 It is a schematic diagram of a sliding seat according to an embodiment of the present application.

[0021] Figure 8 It is a front view of an explosion box according to an embodiment of the present application.

[0022] Figure 9 It is a side view of an explosion box according to an embodiment of the present application.

[0023] Figure 10 It is a perspective view of an explosion box according to an embodiment of the present application.

[0024] Figure 11 It is a top view of an explosion box according to an embodiment of the present application.

[0025] Figure label: 1. Frame; 11. Working platform; 12. Second through hole; 13. Base plate; 14. Top plate; 15. Support column; 17. Protective plate; 18. Horizontal brace. 2. Explosion chamber; 21. First through hole; 22. First air inlet; 23. Concentration display instrument; 24. First side plate; 25. Second side plate; 26. Third side plate; 27. Fourth side plate; 28. Specimen inlet; 29. ​​Chamber door; 30. Closing cylinder; 31. Pressing cylinder; 32. Test bench; 33. Fourth moving device. 4. Hammer body; 41. Connector; 42. Cavity; 43. Impact block; 5. Hammer positioning device; 51. Positioning frame; 52. First moving device; 6. Hammer placement device; 61. Second moving device; 62. Hammer placement device; 63. Guide column; 64. Slide block; 65. Thread wheel; 66. Pulley; 67. Lifting motor. 7. Hammer feeding device; 71. Guide rail; 72. Electric hoist; 81. Unwinding drum; 82. Guide drum; 83. Drive drum; 84. Pressing ring; 85. Third moving device; 86. Guide rod. 91. Exhaust pipe; 92. Air supply pipe. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] The following description, with reference to the accompanying drawings, illustrates an embodiment of the automatic free-fall hammer testing system of the present invention. Figures 1 to 11 As shown, an automatic test system for trackless free-fall hammer according to an embodiment of the present invention includes a frame 1, an explosion box 2, a hammer body 4, and a hammer release device 6.

[0028] like Figures 1 to 3 As shown, the frame 1 includes a base plate 13, a top plate 14 and a plurality of support columns 15. The support columns 15 are connected in the vertical direction. The thickness direction of each of the base plate 13 and the top plate 14 is the vertical direction. The base plate 13 is connected to the bottom of the plurality of support columns 15 and the top plate 14 is connected to the top of the plurality of support columns 15.

[0029] At least a portion of the sides of frame 1 is provided with protective plates 17, and at least a portion of multiple support columns 15 are connected by cross braces 18 to improve the structural strength of frame 1. For example, there are four support columns 15, and both the bottom plate 13 and the top plate 14 are rectangular. Protective plates 17 are provided on the left and right sides, the rear side, and a portion of the front side of frame 1, thereby improving the safety of frame 1. For another example, protective plates 17 are provided on the front, back, left, and right sides of the top plate 14 to form mounting cavities. At least a portion of the protective plates 17 has a mesh structure, and the protective plates 17 are welded to frame 1.

[0030] The explosion chamber 2 is used to contain metal specimens. The top of the explosion chamber 2 has a first through hole 21, and the explosion chamber 2 is located at the bottom of the frame 1. Specifically, the explosion chamber 2 is located on the base plate 13. The hammer 4 passes downward through the first through hole 21 to enter the explosion chamber 2 and impact the metal specimen inside the explosion chamber 2 to conduct a test on the metal specimen.

[0031] like Figures 8 to 11 As shown, in some embodiments, the explosion box 2 includes a first side plate 24 and a second side plate 25 facing away from each other in a first direction, and a third side plate 26 and a fourth side plate 27 facing away from each other in a second direction. The first direction can be a front-back direction, and the second direction can be a left-right direction. For example, the first side plate 24 is the front side plate of the explosion box 2, the second side plate 25 is the rear side plate of the explosion box 2, the third side plate 26 is the left side plate of the explosion box 2, and the fourth side plate 27 is the right side plate of the explosion box 2.

[0032] like Figure 2 , Figures 8 to 11 As shown, in some embodiments, the first side plate 24 has a specimen inlet 28, which is connected to the cavity of the explosion box 2 so as to place a metal specimen into the explosion box 2 or remove the hammer 4.

[0033] A door 29, hinged to the first side plate 24, is provided. A closing cylinder 30, hinged to the frame 1, is provided, with its extension rod hinged to the door 29. When the extension rod of the closing cylinder 30 retracts inward, it opens the door 29; when it extends outward, it seals the specimen inlet 28. This increases the ease of opening and closing the door 29, thereby improving the automation level of the equipment and reducing the workload of the operators.

[0034] A clamping cylinder 31 is provided on the first side plate 24. The telescopic rod of the clamping cylinder 31 extends to pass through the fixed chamber door 29. Specifically, a fixing block is provided on the telescopic rod of the clamping cylinder 31. When the chamber door 29 is closed, the telescopic rod of the clamping cylinder 31 extends outward and blocks the outside of the chamber door 29, so that the chamber door 29 can more stably seal the specimen inlet 28. This can improve the structural strength and airtightness of the explosion chamber 2 when closed. For example, there are multiple clamping cylinders 31.

[0035] In some embodiments, the explosion chamber 2 is equipped with a test bench 32 for placing metal specimens. The explosion chamber 2 is equipped with a fourth moving device 33 connected to the test bench 32, which is used to move the test bench 32 horizontally. Specifically, after the metal specimen is placed on the test bench 32, the fourth moving device 33 moves the test bench 32 horizontally. After the metal specimen is impacted by the hammer 4, the metal specimen to be impacted is moved to a different position directly below the first through hole 21 so as to impact different positions of the metal specimen, thereby improving the test efficiency. For example, the fourth moving device 33 is a screw drive device, and the moving part of the screw drive device moves along the second direction (left-right direction) to precisely control the moving position of the test bench 32 in the second direction (left-right direction).

[0036] like Figures 8 to 11 As shown, in some embodiments, the trackless free-fall hammer automatic testing system also includes a paper sealing device, which includes an unwinding drum 81, a guide drum 82, a drive drum 83, and a pressing ring 84.

[0037] The unwinding drum 81 is used to install the capping paper roll, and the unwound capping paper is used to seal the first through hole 21. The unwinding drum 81 is located on the third side plate 26 and can rotate relative to the third side plate 26 so that the capping paper roll can be unwound.

[0038] The guide cylinder 82 is used to guide the unfolded sealing paper. Guide cylinders 82 are provided on the top of both the third side plate 26 and the fourth side plate 27; the drive drum 83 is used to wind up the unfolded sealing paper. The drive drum 83 is located on the fourth side plate 27. The pressing ring 84 is located on the upper side of the explosion box 2 and is arranged around the outside of the first through hole 21. The pressing ring 84 is used to press the sealing paper onto the top of the explosion box 2. Specifically, the rotational axes of the unwinding drum 81, guide drum 82, drive drum 83, and pressing ring 84 are all in the first direction. The unfolded sealing paper can be supported and moved by the guide drum 82 so that the movement path of the unfolded sealing paper passes through the first through hole 21 on the explosion box 2. The pressing ring 84 is used to press the sealing paper onto the top of the explosion box 2, thereby facilitating the sealing of the first through hole 21.

[0039] The drive drum 83 is connected to the paper sealing motor, which facilitates its rotation. During rotation, the drive drum 83 winds up the unfolded sealing paper. Thus, when a hole is created in the sealing paper by the hammer 4, the drive drum 83 rotates, allowing the un-holeed sealing paper to move above the first through-hole 21, facilitating its sealing. The paper sealing device facilitates sealing the first through-hole 21 and improves the automation level of the equipment. For example, the sealing paper can be kraft paper.

[0040] In some embodiments, the explosion chamber 2 is provided with a first air inlet 22, which is used to introduce combustible gas into the cavity of the explosion chamber 2 to meet the testing environment requirements for the metal specimens. A concentration display 23 is provided on the outside of the explosion chamber 2 to display the concentration of combustible gas within the cavity of the explosion chamber 2. Once the concentration of combustible gas within the cavity of the explosion chamber 2 meets the requirements, the introduction of combustible gas into the cavity of the explosion chamber 2 is stopped.

[0041] like Figures 8 to 11 As shown, in some embodiments, the trackless free-fall hammer automatic testing system further includes an exhaust device, which includes an exhaust pipe 91, an exhaust fan, an air supply pipe 92, and an air supply fan.

[0042] The outlet of the air supply duct 92 is connected to the cavity of the explosion chamber 2, and the air supply fan is connected to the air supply duct 92 to supply air to the cavity of the explosion chamber 2. Thus, when an explosion or smoke occurs after the hammer 4 impacts the metal specimen inside the explosion chamber 2, the air supply fan and the air supply duct 92 can be used to supply air to the cavity of the explosion chamber 2, so that the polluted gas or combustible gas inside the explosion chamber 2 can be discharged from the explosion chamber 2 through the first through hole 21.

[0043] The inlet of the extraction pipe 91 is located above the explosion box 2 and adjacent to the first through hole 21. The extraction fan is connected to the extraction pipe 91 and can be used to extract air. Thus, polluted gas or flammable gas discharged from the explosion box 2 through the first through hole 21 can be extracted by the extraction pipe 91 to protect personnel.

[0044] like Figures 1 to 4 As shown, the hammer positioning device 5 includes a positioning member and a first moving device 52. The positioning member is used to position the hammer 4, and the first moving device 52 is connected to the positioning member and can move the positioning member between a first position and a second position. In the first position, the positioning member positions the hammer 4 directly above the first through hole 21. In the second position, the positioning member is horizontally spaced from the first through hole 21. Thus, the hammer positioning device 5 can be used to position the hammer 4 horizontally so that the hammer 4, after falling, enters the explosion box 2 through the first through hole 21.

[0045] like Figure 5 As shown, in some embodiments, the positioning element is a positioning frame 51. The top of the positioning frame 51 is open and used to place the hammer 4. The first moving device 52 can drive the positioning frame 51 to move between a first position and a second position. Specifically, after the hammer 4 is placed on the positioning frame 51 in the second position, the first moving device 52 moves the positioning frame 51 to the first position so that the hammer 4 on the positioning frame 51 is located directly above the first through hole 21, thereby facilitating the positioning of the hammer 4.

[0046] In some embodiments, the positioning frame 51 includes a lower plate and an upper plate. The lower plate is connected to the upper plate via a plurality of support columns and is used to support the lower part of the hammer 4. The upper plate has a limiting through hole for accommodating the hammer 4 and for limiting the hammer 4 in the horizontal direction, so as to position the hammer 4.

[0047] In some embodiments, the first moving device 52 includes a slide rail, a sliding plate, and a first cylinder, with the slide rail extending along a first direction. A positioning frame 51 is disposed on the sliding plate, and the first cylinder can drive the sliding plate to move along the slide rail in the first direction, thereby moving the positioning frame 51 between a first position and a second position. For example, the second position is located at the front side of the frame 1.

[0048] like Figures 1 to 3 As shown, in some embodiments, the trackless free-fall hammer automatic testing system further includes a hammer feeding device 7, which includes a guide rail 71 and an electric hoist 72. The guide rail 71 extends along a first direction and is fixed to the top of the frame 1, with one end of the guide rail 71 extending out of the frame 1. The electric hoist 72 is movably mounted on the guide rail 71 along the first direction and is used to move the hammer 4. For example, the guide rail 71 is welded to the frame 1, extends along a front-rear direction, and its front end extends out of the frame 1.

[0049] The first moving device 52 can drive the positioning frame 51 to move in the first direction, and the electric hoist 72 can move the hammer 4 onto the positioning frame 51 located in the second position. Specifically, the guide rail 71 is located directly above the hammer positioning device 5 (positioning frame 51). The rope of the electric hoist 72 is connected to the hammer 4, and can then pull the hammer 4 upward to a certain height. Then, the electric hoist 72 moves along the guide rail 71 in the first direction to directly above the positioning frame 51 located in the second position, and then the hammer 4 moves downward onto the positioning frame 51 so that the hammer positioning device 5 can move the hammer 4 to the first position (directly above the first through hole 21).

[0050] like Figures 1 to 3 As shown, in some embodiments, a working platform 11 is provided on the frame 1 above the explosion box 2. The hammer positioning device 5 is located above the working platform 11. For example, a first moving device 52 (slide rail, sliding plate and first cylinder) is located on the upper surface of the working platform 11.

[0051] The working platform 11 has a second through hole 12 located directly above the first through hole 21, through which the hammer 4 can descend and enter the explosion box 2 in sequence via the second through hole 12 and the first through hole 21. For example, in the first position, the positioning frame 51 is located directly above the second through hole 12.

[0052] The pressing ring 84 is located below the working platform 11. A third moving device 85 is provided on the working platform 11. The third moving device 85 is connected to the pressing ring 84 and can drive the pressing ring 84 to move vertically. This facilitates the pressing ring 84 pressing down to seal the paper, thereby improving the automation level of the equipment. For example, the third moving device 85 includes multiple third cylinders, and the bottom of the telescopic rod of the third cylinder is connected to the pressing ring 84 via a fixing member.

[0053] The pressing ring 84 is provided with a guide rod 86, which is slidably connected to the working platform 11 in the vertical direction, thereby improving the stability of the pressing ring 84 in the vertical direction.

[0054] like Figures 1 to 3 , Figure 6 As shown, the hammer-releasing device 6 is located on the frame 1, above the explosion chamber 2. The hammer-releasing device 6 includes a second moving device 61 and a hammer-releasing mechanism 62. The second moving device 61 can move the hammer-releasing mechanism 62, which is used to fix and release the hammer body 4. Specifically, after the hammer-releasing mechanism 62 is fixedly connected to the hammer body 4 on the positioning frame 51 located at the first position, the second moving device 61 moves the hammer-releasing mechanism 62 upwards, while the positioning frame 51 moves to the second position, without affecting the falling of the hammer body 4. After the second moving device 61 moves the hammer-releasing mechanism 62 to a preset height, the hammer-releasing mechanism 62 releases the hammer body 4, allowing it to pass downwards through the first through hole 21 and impact the metal specimen inside the explosion chamber 2. For example, the hammer-releasing mechanism 62 can attract or clamp the hammer body 4.

[0055] In some embodiments, the hammer release device 62 includes an electromagnetic hammer release device, which can use magnetic force to fix the hammer body 4 and can release the hammer body 4 by energizing or de-energizing.

[0056] In some embodiments, the hammer release device 62 is located directly above the first through hole 21. When the electromagnetic hammer release device is de-energized, it can magnetically attract the hammer body 4; when the electromagnetic hammer release device is energized, it can release the hammer body 4. Thus, in the event of a power outage in the trackless free-fall hammer automatic testing system, the hammer body 4 can be attracted to the hammer release device 62, thereby improving the safety of the test. For example, the hammer release device 62 is a de-energized electromagnet (magnetic when de-energized, non-magnetic when energized). The hammer release device 62 (electromagnetic hammer release device) uses the magnetic field generated by the energized coil to cancel or counteract the magnetic field of the permanent magnet, thereby achieving the effect of "no magnetic force when energized, and restored magnetic force when de-energized". After the hammer release device 62 is energized, it releases the hammer body 4, which then undergoes free fall. As another example, the hammer release device 62 includes a direct-push cylinder.

[0057] like Figures 1 to 3 As shown, the second moving device 61 includes a guide post 63, a slide block 64, a pulley 65, and a lifting motor 67.

[0058] Guide posts 63 extend vertically and are connected to frame 1. A slide 64 is movably mounted vertically and connected to the guide posts 63, and is also connected to the hammer release device 62. Specifically, there are two guide posts 63 arranged side-by-side in a second direction (left-right direction), and the slide 64 has two grooves that mate with the guide posts 63, allowing the two guide posts 63 to guide the slide 64. For example, the hammer release device 62 is located at the bottom of the slide 64.

[0059] The rope on the reel 65 is connected to the slide 64. A lifting motor 67 is located at the top of the frame 1 and connected to the reel 65. The lifting motor 67 drives the reel 65 to rotate, thereby moving the slide 64 and the hammer release device 62 on the slide 64 in the vertical direction. For example, the slide 64 includes a crossbeam, a linear bearing, and a hook seat. The linear bearing is sleeved on the outside of the guide post 63, and the hammer release device 62, linear bearing, and hook seat are all located on the crossbeam. The top of the frame 1 is provided with a pulley 66 that engages with and guides the rope on the reel 65.

[0060] Thus, after the hammer release device 62 magnetically attracts the hammer body 4, the lifting motor 67 drives the reel 65 to rotate, thereby moving the slide 64 and the hammer release device 62 on the slide 64 upward. After the hammer body 4 moves to a preset height, the hammer release device 62 releases the hammer body 4 so that it can enter the explosion chamber 2 downward and impact the metal specimen. For example, the lifting motor 67 is connected to the reel 65 through a reducer.

[0061] In some embodiments, the top of the hammer body 4 is provided with a connecting member 41, and the hammer release device 62 includes a fifth moving device. The fifth moving device can drive the push plate to engage with the connecting member 41 of the hammer body 4 to prevent the hammer body 4 from falling. For example, the bottom of the connecting member 41 is connected to the top of the hammer body 4 through a column with a diameter smaller than its own. When the electric electromagnet attracts the hammer body 4, the telescopic rod of the fifth moving device (direct push cylinder) drives the push plate to engage with the connecting member 41, thereby forming a double layer of protection. When it is necessary to release the hammer body 4, the telescopic rod of the fifth moving device (direct push cylinder) retracts inward. For example, the slide 64 is provided with a slot that cooperates with the push plate.

[0062] In some embodiments, the top of the connector 41 is provided with a connecting screw hole for installing a lifting ring. Thus, when it is necessary to lift the hammer 4, a lifting ring is installed on the connector 41 so that the hammer 4 can be lifted using a crane (electric hoist 72). For example, the connecting screw hole extends downward into the connecting column.

[0063] In some embodiments, the hammer body 4 is provided with a copper protective layer on its outer side. Specifically, the hammer body 4 is made of steel that can be attracted by magnetic force. The outer surface of the hammer body 4 is coated with copper, which makes the hammer body 4 less prone to generating electric sparks, thereby improving the safety of the test.

[0064] like Figure 5 and Figure 6As shown, in some embodiments, the upper part of the hammer body 4 is provided with a cavity 42, and the inner side of the upper part of the hammer body 4 is hollow, so that the center of gravity of the hammer body 4 is lowered, ensuring that it does not tilt during free fall and effectively impacts the metal sample.

[0065] In some embodiments, at least a portion of the lower part of the hammer body 4 has its outer radial direction reduced downward in order to reduce the resistance of the hammer body 4, making it easier for the hammer body 4 to impact the metal sample.

[0066] In some embodiments, the bottom of the hammer body 4 is provided with an impact block 43, which is cylindrical, so as to impact the metal specimen.

[0067] In some embodiments, the trackless free-fall hammer automatic testing system according to the present invention is provided with an operating console, which can control the various devices of the trackless free-fall hammer automatic testing system according to the present invention, so as to improve the automation level of the equipment.

[0068] Therefore, the trackless free-fall hammer automatic testing system according to an embodiment of the present invention can improve testing efficiency and has high safety.

[0069] The trackless free-fall hammer automatic testing system according to an embodiment of the present invention includes the following steps when conducting a drop hammer impact test: The closing cylinder 30 opens the chamber door 29, the metal test piece is placed inside the explosion chamber 2, and then the closing cylinder 30 closes the chamber door 29 and the clamping cylinder 31 secures the chamber door 29. The drive drum 83 rotates, and the pressing ring 84 moves downward to seal the first through hole 21 with a sealing paper. Combustible gas is introduced into the explosion chamber 2 through the first air inlet 22. After the concentration display 23 shows that the concentration of combustible gas in the explosion chamber 2 has reached a specified concentration, the introduction of combustible gas into the explosion chamber 2 is stopped. The hammer 4 is placed on the positioning frame 51 in the second position using the hammer feeding device 7, and the hammer positioning device 5 moves the positioning frame 51 to the first position so that the hammer 4 is directly above the first through hole 21. Then, the hammer release device 62 of the hammer release device 6 is used to hold the hammer body 4, and the second moving device 61 drives the hammer release device 62 to move upward. At the same time, the positioning frame 51 moves to the second position, and then the hammer release device 62 releases the hammer body 4, causing the hammer body 4 to fall into the explosion box 2 and impact metal for a test to observe whether it explodes. The exhaust device is used to absorb the polluted gas discharged from the explosion box 2.

[0070] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0074] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A trackless free-fall hammer automatic testing system, characterized in that, include: frame; An explosion chamber for containing a metal specimen, the top of the explosion chamber having a first through hole, the explosion chamber being located at the bottom of the frame; Hammer body; A hammer positioning device includes a positioning element and a first moving device. The positioning element is used to position the hammer. The first moving device is connected to the positioning element and can drive the positioning element to move between a first position and a second position. In the first position, the positioning element is used to position the hammer directly above the first through hole. In the second position, the positioning element is spaced apart from the first through hole in the horizontal direction. A hammer-releasing device is provided on the frame and located above the explosion box. The hammer-releasing device includes a second moving device and a hammer-releasing mechanism. The second moving device can drive the hammer-releasing mechanism to move. The hammer-releasing mechanism is used to fix and release the hammer body.

2. The trackless free-fall hammer automatic testing system according to claim 1, characterized in that, The positioning element is a positioning frame, the top of which is open and used to place the hammer body. The first moving device can drive the positioning frame to move between a first position and a second position.

3. The trackless free-fall hammer automatic testing system according to claim 2, characterized in that, The trackless free-fall hammer automatic testing system also includes a hammer feeding device, which includes a guide rail and an electric hoist. The guide rail extends along a first direction and is fixed to the top of the frame. One end of the guide rail extends out of the frame. The electric hoist is movably mounted on the guide rail along the first direction and is used to move the hammer. The first moving device can drive the positioning frame to move in the first direction, and the electric hoist can move the hammer body to the positioning frame located in the second position.

4. The trackless free-fall hammer automatic testing system according to claim 2, characterized in that, The hammer release device includes an electromagnetic hammer release device, which can use magnetic force to fix the hammer body. The second mobile device includes Guide post, which extends in the vertical direction and is connected to the frame; A slide block, which is movably disposed in the vertical direction and connected to the guide post, and the slide block is connected to the hammer release device; A reel, on which the rope is connected to the slide block; A lifting motor is located at the top of the frame and connected to the reel. The lifting motor drives the reel to rotate, thereby moving the slide and the hammer release device on the slide in the vertical direction.

5. The trackless free-fall hammer automatic testing system according to claim 4, characterized in that, The hammer release device is located directly above the first through hole; When the electromagnetic hammer release device is de-energized, it can use magnetic force to attract the hammer body; when the electromagnetic hammer release device is energized, it can release the hammer body.

6. The trackless free-fall hammer automatic testing system according to any one of claims 1-5, characterized in that, The trackless free-fall hammer automatic testing system also includes a paper sealing device, which includes... An unwinding drum is used to install a capping paper roll, and the unwound capping paper from the capping paper roll is used to seal the first through hole. A guide tube, which is used to guide the unfolded sealing paper; A drive roll for winding up unfolded cover paper; The pressing ring is located on the upper side of the explosion box and is arranged around the outside of the first through hole. The pressing ring is used to press the sealing paper onto the top of the explosion box.

7. The trackless free-fall hammer automatic testing system according to claim 6, characterized in that, The frame is equipped with a working platform located above the explosion box; The working platform has a second through hole located directly above the first through hole, and the hammer can enter the explosion box by passing downward through the second through hole and the first through hole in sequence. The pressing ring is located below the working platform. The working platform is provided with a third moving device. The third moving device is connected to the pressing ring and can drive the pressing ring to move in the vertical direction. The pressing ring is provided with a guide rod, which is slidably connected to the working platform in the vertical direction. The hammer positioning device is located above the working platform.

8. The trackless free-fall hammer automatic testing system according to claim 6, characterized in that, The trackless free-fall hammer automatic testing system also includes an exhaust device, which includes... An exhaust pipe, the inlet of which is located above the explosion box and adjacent to the first through hole; An exhaust fan, wherein the exhaust fan is connected to the exhaust pipe and can be used to extract air; An air supply duct, the outlet of which is connected to the cavity of the explosion box; An air supply fan is connected to the air supply pipe to supply air to the cavity of the explosion box.

9. The trackless free-fall hammer automatic testing system according to claim 8, characterized in that, The frame includes a base plate, a top plate, and multiple support columns connected in a vertical direction. The thickness direction of each of the base plate and the top plate is vertical. The base plate is connected to the bottom of the multiple support columns, and the top plate is connected to the top of the multiple support columns. The explosion box is mounted on the base plate, and at least a portion of the side of the frame is provided with a protective plate. At least a portion of the plurality of support columns are connected by cross braces. The explosion box is provided with a first air inlet for introducing combustible gas into the cavity of the explosion box. A concentration display is provided on the outside of the explosion box for displaying the concentration of combustible gas in the cavity of the explosion box. The explosion box includes a first side plate and a second side plate facing away from each other in a first direction, and a third side plate and a fourth side plate facing away from each other in a second direction. The first side plate has a specimen inlet and a box door. The frame is equipped with a closing cylinder that is hinged to the box door. The telescopic rod of the closing cylinder is hinged to the box door. The telescopic rod of the closing cylinder extends outward so that the box door can cover the specimen inlet. The first side plate is equipped with a pressing cylinder. The telescopic rod of the pressing cylinder extends outward so as to fix the box door. The unwinding drum is located on the third side plate, the driving drum is located on the fourth side plate, and the guide cylinder is located on the top of both the third side plate and the fourth side plate. The explosion chamber is equipped with a test bench for placing metal specimens. The explosion chamber is also equipped with a fourth moving device connected to the test bench, which is used to move the test bench in the horizontal direction.

10. The trackless free-fall hammer automatic testing system according to any one of claims 7-9, characterized in that, The top of the hammer body is provided with a connecting piece, and the hammer release device includes a fifth moving device, which can drive a push plate to engage with the connecting piece of the hammer body to prevent the hammer body from falling; and / or The outer side of the hammer body is provided with a copper protective layer; and / or The upper part of the hammer body is provided with a cavity; and / or At least a portion of the lower part of the hammer body decreases radially downward; and / or The hammer body has an impact block at its bottom.

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