A material bottom tray balancing device based on a drop weight impact test system

Abstract

The invention belongs to the technical field of impact testing, and specifically relates to a material bottom pallet balancing device based on a drop hammer impact testing system. The balancing device is arranged between the pallet and the supporting column, and the balancing device includes a plurality of balancing units, and the plurality of balancing units and the pallet are in the same horizontal plane, and the balancing units include: a rolling clamping mechanism, the rolling clamping mechanism is sleeved on the supporting column, and moves along the guide of the supporting column, and is used to drive the plurality of balancing units and the pallet to move along the guide of the supporting column; a connecting rod, one end of the connecting rod is fixed on the rolling clamping mechanism, and the other end is fixed on the pallet, and the connecting rod is linked with the pallet, and is also used to limit the horizontal displacement of the pallet. The balancing device does not need to manually adjust the balance of the pallet, which ensures the balance of the pallet during the test, and completely avoids the possibility of the rod to be tested being subjected to shear stress, thereby greatly improving the accuracy and efficiency of the test.

Description

Technical Field

[0001] The invention belongs to the technical field of impact testing, and in particular relates to a material bottom tray balancing device based on a drop hammer impact testing system. Background Art

[0002] Anchor rods and anchor cables, wire ropes and other related materials are widely used in geotechnical engineering, especially in tunnels, mines, slope stability, foundation pit support, dam reinforcement and other fields. They enhance the stability of soil or rock by providing additional support, prevent disasters such as landslides and collapses, and effectively control ground settlement and deformation. The anchoring system has long-term stability, can reduce construction costs, shorten construction periods, and improve structural safety. Compared with traditional support technologies, anchor rods and anchor cables show strong adaptability and cost-effectiveness in complex geological environments, reduce the impact on the surrounding environment, and are widely used in deep foundation pits, high-rise buildings, underground projects and other projects, becoming an indispensable support method in modern engineering.

[0003] The purpose of impact testing on anchor rods, anchor cables, wire ropes and other related materials is to evaluate their performance and reliability under extreme loads and ensure that they can effectively resist instantaneous or impact loads, especially in extreme environments such as earthquakes and explosions. The test helps to verify the strength, toughness and durability of anchoring and protective materials, optimize the design and construction methods, ensure the stability of the anchoring system under special loads, and thus improve the safety and reliability of the project.

[0004] In existing impact test systems, especially drop-hammer impact test systems, there is often a tray above the impact-end lock of anchor rods, anchor cables, wire ropes and other related materials, followed by a force-bearing upper pad. The tray often becomes slightly unbalanced due to mechanical vibrations during the test. When the drop-hammer impacts, a huge impact force acts on the tray. At this time, the original slight tilt causes the tray to be unevenly stressed during the impact. The tilted tray gives the test material shear stress that should not exist during the impact, affecting the accuracy of the test results. At the same time, after a drop-hammer, the shock during the return stroke of the impact device will cause the tray to lose balance and tilt again. At this time, manual leveling is often required, which seriously affects the accuracy and efficiency of the test.

[0005] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0006] The purpose of the present invention is to provide a material bottom tray balancing device for a drop weight impact test, so as to at least solve the above-mentioned problems existing in the prior art.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A material bottom tray balancing device based on a drop hammer impact test system, the drop hammer impact test system comprising a rod to be tested, a tray, an upper pad, a lock, an impact drop hammer and a supporting column, wherein the upper pad, the tray and the lock are sequentially sleeved on the lower end of the rod to be tested from top to bottom;

[0009] The balancing device is arranged between the pallet and the supporting column, and is used to keep the pallet in a balanced state at all times. The balancing device comprises a plurality of balancing units, and the plurality of balancing units and the pallet are in the same horizontal plane. The balancing units comprise:

[0010] A rolling clamping mechanism, which is sleeved on the supporting column and moves along the supporting column, and is used to drive the multiple balancing units and the tray to move along the supporting column;

[0011] A connecting rod, one end of which is fixed on the rolling clamping mechanism, and the other end of which is fixed on the pallet. Based on the linkage between the connecting rod and the pallet, the connecting rod is also used to limit the horizontal displacement of the pallet.

[0012] As described above, in the material bottom pallet balancing device based on the drop weight impact test system, preferably, one end of the connecting rod is fixed to the rolling clamping mechanism by welding, and the other end is fixed to the pallet by a plurality of first bolts.

[0013] As described above, in the material bottom tray balancing device based on the drop weight impact test system, preferably, the plurality of first bolts are arranged along the extension direction of the connecting rod.

[0014] As described above, in the material bottom tray balancing device based on the drop hammer impact test system, preferably, the rolling clamping mechanism includes two L-shaped clamping rings, and the two L-shaped clamping rings are combined to form an annular closed structure, and the inner cavity of the annular closed structure is consistent with the cross-sectional shape of the supporting column.

[0015] As described above, in the material bottom tray balancing device based on the drop weight impact test system, preferably, a retaining frame is provided on the inner side of the L-shaped ring, and a slot is provided between the retaining frame and the inner wall of the L-shaped ring.

[0016] As described above, in the material bottom tray balancing device based on the drop weight impact test system, preferably, a plurality of balls are arranged in the slot between the retaining frame and the L-shaped ring, and a plurality of clearance holes are arranged on the surface of the retaining frame, and each ball is clamped in a clearance hole; each of the balls is in contact with the supporting column.

[0017] As described above, in the material bottom tray balancing device based on the drop weight impact test system, preferably, one end of the connecting rod is welded and fixed at a corner position of an L-shaped ring;

[0018] Flange flanges are arranged on both sides of the L-shaped ring, and the flange flanges of the two L-shaped rings fit each other and are fixedly connected by a second screw.

[0019] As described above, in the material bottom tray balancing device based on the drop weight impact test system, preferably, the upper pad is provided with an opening, and the opening is connected to the through hole in the center of the upper pad.

[0020] As described above, the material bottom tray balancing device based on the drop weight impact test system is preferably provided with U-shaped grooves on both sides of the opening of the upper pad, and U-shaped limiting plates are provided between the U-shaped grooves on both sides of the opening, and the U-shaped limiting plates are connected to the upper pad by a third screw.

[0021] As described above, in the material bottom tray balancing device based on the drop weight impact test system, preferably, a connecting rod is provided between two adjacent connecting rods to form a triangular reinforcement unit between the two adjacent connecting rods, the connecting rod and the tray.

[0022] Beneficial effects:

[0023] In the balancing device, the rolling clamping mechanisms of the multiple balancing units guide along the supporting columns, which can make the plane where the pallet is located move in the vertical direction more smoothly, so that the pallet always remains in a horizontal state without any angle tilt, thereby ensuring that the pallet has good balance during the entire test cycle; at the same time, under the action of the connecting rods of the multiple balancing units, more than three connecting rods can completely realize the positioning of the pallet in a certain vertical direction, so that the pallet will not move in the horizontal direction; in summary, under the action of multiple balancing units, the pallet will not tilt at an angle or move in the horizontal direction, and there is no need to manually adjust the balance of the pallet, which ensures the balance of the pallet during the test and completely avoids the possibility of the rod to be tested being subjected to shear stress, thereby greatly improving the accuracy and efficiency of the test.

[0024] Two first bolts are provided for connecting the connecting rod and the pallet. The two first bolts fixed along the extending direction of the connecting rod can ensure that the connecting rod is more stably fixed to the pallet. When the pallet is subjected to a large impact force, the connecting rod will not rotate relative to the pallet.

[0025] Under the limiting action of the cage, the ball can rotate freely in the groove between the cage and the L-shaped ring; thereby, the contact between the rolling clamping mechanism and the supporting column is transformed into rolling friction contact, so as to reduce the friction force between the rolling clamping mechanism and the supporting column.

[0026] A connecting rod is set between any two adjacent balancing units to form a triangular reinforcement unit between the two adjacent connecting rods, the connecting rod and the tray. This can not only enhance the overall structural strength of the balancing device, but also better maintain the balance of the tray, thereby greatly improving the accuracy and efficiency of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting part of the present application are used to provide a further understanding of the invention. The exemplary embodiments and descriptions of the invention are used to explain the invention and do not constitute an improper limitation on the invention. Among them:

[0028] Figure 1 A schematic diagram of a balancing device according to an embodiment of the present invention installed in a drop weight impact test system;

[0029] Figure 2 A schematic diagram of the structure of a balancing device according to an embodiment of the present invention;

[0030] Figure 3 An exploded schematic diagram of a balancing device for creating an embodiment of the present invention;

[0031] Figure 4 A structural schematic diagram of a rolling card holding mechanism according to an embodiment of the present invention;

[0032] Figure 5 An exploded schematic diagram of a tray and an upper tray in accordance with one embodiment of the present invention.

[0033] In the figure: 10-impact drop hammer, 20-support column, 30-balancing device, 40-rod to be tested, 50-lock, 1-upper pad, 11-U-shaped groove, 12-U-shaped limit plate, 13-third screw, 2-tray, 21-through hole, 22-first bolt, 3-connecting rod, 4-rolling clamping mechanism, 41-L-shaped clamping ring, 42-retaining frame, 43-ball, 44-second screw. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0035] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0037] According to the specific embodiments of the present invention, Figure 1-5 As shown, the present invention provides a material bottom tray balancing device based on a drop hammer impact test system, the drop hammer impact test system comprises a rod body 40 to be tested, a tray 2, an upper pad 1, a lock 50, an impact drop hammer 10 and a support column 20, and the upper pad 1, the tray 2 and the lock 50 are sequentially sleeved on the lower end of the rod body 40 to be tested from top to bottom;

[0038] The balancing device 30 is disposed between the tray 2 and the supporting column 20, and is used to keep the tray 2 in a balanced state at all times. The balancing device 30 includes a plurality of balancing units, and the plurality of balancing units are in the same horizontal plane as the tray 2. The balancing units include:

[0039] The rolling clamping mechanism 4 is sleeved on the supporting column 20 and guided and moved along the supporting column 20, and is used to drive the multiple balancing units and the tray 2 to move along the supporting column 20;

[0040] The connecting rod 3 has one end fixed on the rolling clamping mechanism 4 and the other end fixed on the pallet 2. The connecting rod 3 is also used to limit the horizontal displacement of the pallet 2 on the basis of linkage with the pallet 2.

[0041] In the balancing device 30, at least three balancing units are arranged. Since three points can determine a plane, the three balancing units can ensure that they are in the same plane as the pallet 2. On this basis, the rolling clamping mechanism 4 of the multiple balancing units guides along the supporting column 20, which can make the plane where the pallet 2 is located move vertically more smoothly, so that the pallet 2 always maintains a horizontal state without any angle tilt, thereby ensuring that the pallet 2 has good balance during the entire test cycle. At the same time, under the action of the connecting rods 3 of the multiple balancing units, more than three connecting rods 3 can completely realize the positioning of the pallet 2 in a certain vertical direction, so that the pallet 2 will not be displaced in the horizontal direction. In summary, under the action of multiple balancing units, the pallet 2 will neither be tilted at an angle nor displaced in the horizontal direction. There is no need to manually adjust the balance of the pallet 2, which ensures the balance of the pallet 2 during the test and completely avoids the possibility of the rod body 40 to be tested being subjected to shear stress, thereby greatly improving the accuracy and efficiency of the test.

[0042] In this embodiment, four balancing units are provided, one end of each of the four balancing units is connected to a supporting column 20 , and the other end of each of the four balancing units is connected to the tray 2 , so as to better maintain the balance of the tray 2 .

[0043] One end of the connecting rod 3 is fixed to the rolling clamping mechanism 4 by welding, and the other end is fixed to the pallet 2 by a plurality of first bolts 22. In one embodiment of the present application, the connecting rod 3 is connected to the pallet 2 by the first bolts 22, so as to facilitate the disassembly and installation operation between the balancing unit and the pallet 2, making the use of the balancing device 30 more flexible.

[0044] A plurality of first bolts 22 are arranged along the extension direction of the connecting rod 3. In one embodiment of the present application, since two points can determine a straight line, in this embodiment, two first bolts 22 are provided for connecting the connecting rod 3 and the tray 2. The two first bolts 22 fixed along the extension direction of the connecting rod 3 can ensure that the connecting rod 3 is more stably fixed to the tray 2, and when the tray 2 is subjected to a large impact force, the connecting rod 3 will not rotate relative to the tray 2.

[0045] The rolling clamping mechanism 4 includes two L-shaped clamping rings 41 , which together form an annular closed structure, and the inner cavity of the annular closed structure has the same cross-sectional shape as the supporting column 20 .

[0046] In one embodiment of the present application, the cross-sectional shape of the support column 20 is a rounded square, and two L-shaped rings 41 are enclosed to form a rounded square. The two L-shaped rings 41 are enclosed and sleeved on the support column 20 to facilitate its guided movement along the support column 20.

[0047] A retainer 42 is provided inside the L-shaped ring 41, and a slot is provided between the retainer 42 and the inner wall of the L-shaped ring 41. In one embodiment of the present application, the retainer 42 is fixed to the inner wall of the L-shaped ring 41 by bolts, so as to facilitate the disassembly connection between the retainer 42 and the L-shaped ring 41, and to facilitate the installation and replacement of the ball 43 between the retainer 42 and the L-shaped ring 41.

[0048] A plurality of balls 43 are arranged in the slot between the retainer 42 and the L-shaped ring 41, and a plurality of clearance holes are arranged on the surface of the retainer 42, and each ball 43 is clamped in a clearance hole; each ball 43 is in contact with the support column 20. In one embodiment of the present application, under the limiting effect of the retainer 42, the ball 43 can rotate freely in the slot between the retainer 42 and the L-shaped ring 41; thereby, the contact between the rolling clamping mechanism 4 and the support column 20 becomes a rolling friction contact, so as to reduce the friction force between the rolling clamping mechanism 4 and the support column 20.

[0049] One end of the connecting rod 3 is welded and fixed to a corner position of an L-shaped holding ring 41; flange flanges are provided on both sides of the L-shaped holding ring 41, and the flange flanges of the two L-shaped holding rings 41 fit together and are fixedly connected by a second screw 44. In one embodiment of the present application, the connecting rod 3 is welded and fixed to an L-shaped holding ring 41 as an integral structure, and the flange flanges of the two L-shaped holding rings 41 fit together and are fixedly connected by a second screw 44, which makes it easier to disassemble and install the rolling clamping mechanism 4.

[0050] The upper pad 1 is provided with an opening, which is connected to the through hole 21 in the center of the upper pad 1. In one embodiment of the present application, the upper pad 1 is provided with an opening connected to the central through hole 21, so that the upper pad 1 can be installed on the tray 2 from the opening of the upper pad 1.

[0051] U-shaped grooves 11 are provided on both sides of the opening of the upper pad 1, and U-shaped limiting pieces 12 are provided between the U-shaped grooves 11 on both sides of the opening, and the U-shaped limiting pieces 12 are connected to the upper pad 1 by third screws 13. In one embodiment of the present application, the two sides of the opening of the upper pad 1 are connected into an integrated structure by the U-shaped limiting pieces 12, which not only makes the upper pad 1 fall off from the opening position, but also improves the integrity of the upper pad 1.

[0052] In one embodiment of the present application, a clearance groove is provided at the bottom of the upper pad 1, and the clearance groove is used to accommodate the nut of the second bolt, so that the upper pad 1 and the tray 2 can fit more closely; and the lower part of the tray 2 is an inverted frustum, and the lower part of the tray 2 is against the lock 50, so that the force on the tray 2 during the impact process acts more concentratedly on the lock 50.

[0053] A connecting rod is provided between two adjacent connecting rods 3, so that a triangular reinforcement unit is formed between the two adjacent connecting rods 3, the connecting rod and the tray 2. In one embodiment of the present application, a connecting rod is provided between any two adjacent balancing units, so that a triangular reinforcement unit is formed between the two adjacent connecting rods 3, the connecting rod and the tray 2, which can not only strengthen the overall structural strength of the balancing device 30, but also better maintain the balance of the tray 2, thereby greatly improving the accuracy and efficiency of the test.

[0054] It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A material bottom tray balancing device based on a drop weight impact test system, characterized in that: The drop hammer impact test system comprises a rod body to be tested, a tray, an upper pad, a lock, an impact drop hammer and a supporting column, wherein the upper pad, the tray and the lock are sequentially sleeved on the lower end of the rod body to be tested from top to bottom; The balancing device is arranged between the pallet and the supporting column, and is used to keep the pallet in a balanced state at all times. The balancing device comprises a plurality of balancing units, and the plurality of balancing units and the pallet are in the same horizontal plane. The balancing units comprise: A rolling clamping mechanism, which is sleeved on the supporting column and moves along the supporting column, and is used to drive the multiple balancing units and the tray to move along the supporting column; A connecting rod, one end of which is fixed to the rolling clamping mechanism, and the other end of which is fixed to the pallet. The connecting rod is linked to the pallet and is also used to limit the horizontal displacement of the pallet; The rolling clamping mechanism includes two L-shaped clamping rings, which are combined to form an annular closed structure, and the inner cavity of the annular closed structure is consistent with the cross-sectional shape of the supporting column; A retaining frame is provided on the inner side of the L-shaped holding ring, and a clamping groove is provided between the retaining frame and the inner wall of the L-shaped holding ring; A plurality of balls are arranged in the slot between the retaining frame and the L-shaped holding ring, and a plurality of clearance holes are arranged on the surface of the retaining frame, and each ball is clamped in a clearance hole; each ball is in contact with the supporting column.

2. The material bottom tray balancing device based on the drop weight impact test system according to claim 1 is characterized in that: One end of the connecting rod is fixed to the rolling clamping mechanism by welding, and the other end is fixed to the pallet by a plurality of first bolts.

3. The material bottom tray balancing device based on the drop weight impact test system according to claim 2 is characterized in that: The plurality of first bolts are arranged along an extending direction of the connecting rod.

4. The material bottom tray balancing device based on the drop weight impact test system according to claim 1 is characterized in that: One end of the connecting rod is welded and fixed at a corner position of an L-shaped ring; Flange flanges are arranged on both sides of the L-shaped ring, and the flange flanges of the two L-shaped rings fit each other and are fixedly connected by a second screw.

5. The material bottom tray balancing device based on the drop weight impact test system according to claim 1, characterized in that: The upper pad is provided with an opening, and the opening is connected to the through hole in the center of the upper pad.

6. The material bottom tray balancing device based on the drop weight impact test system according to claim 5, characterized in that: U-shaped grooves are arranged on both sides of the opening of the upper pad, and U-shaped limiting plates are arranged between the U-shaped grooves on both sides of the opening. The U-shaped limiting plates are connected to the upper pad by a third screw.

7. The material bottom tray balancing device based on the drop weight impact test system according to any one of claims 1 to 6, characterized in that: A connecting rod is arranged between two adjacent connecting rods, so that a triangular reinforcement unit is formed between the two adjacent connecting rods, the connecting rod and the tray.

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