Pendulum impact test device

Abstract

The invention relates to the field of semi-automatic impact loading tests, in particular to a pendulum bob type impact test device. Comprising a reaction frame mechanism, an axial pressure applying mechanism is arranged on one side of the reaction frame mechanism, an impacted test piece is arranged on the axial pressure applying mechanism, a linkage type automatic release electromagnetic attraction mechanism is arranged on the other side of the corresponding reaction frame mechanism, and a pendulum bob mechanism is arranged between the axial pressure applying mechanism and the linkage type automatic release electromagnetic attraction mechanism. The pendulum bob mechanism is connected with the reaction frame mechanism through the power lifting control mechanism; the pendulum bob mechanism swings between the axial applying mechanism and the linkage type automatic release electromagnetic attraction mechanism, and accidental instability prevention mechanisms are arranged on the two sides of the swinging path of the pendulum bob mechanism. Multiple times of impact of the pendulum bob mechanism on the impacted test piece are realized, and the impact speed of the pendulum bob mechanism on the impacted test piece can be accurately controlled.

Description

Technical Field

[0001] The invention relates to the field of semi-automatic impact loading test, in particular to a pendulum type impact test device. Background Art

[0002] In the nearshore area, the coastal building structure system suffers from severe erosion due to a series of complex processes in the tsunami chain disaster, among which the impact effect of tsunami floating objects is particularly prominent. Specifically, tsunami waves cause ships, containers, vehicles, etc. to be transformed into high-energy floating objects. Driven by the waves, these objects form dynamic impact forces, which continuously and violently impact coastal structures. Tsunami floating objects pose a threat to the safety and stability of coastal areas that cannot be ignored. Therefore, in-depth research on the impact effect of tsunami floating objects in tsunami chain disasters and their impact on the damage mechanism of structures is of great significance to improving coastal disaster prevention and mitigation capabilities.

[0003] There are many types of tsunami floating objects, with different shapes and huge numbers. The threats posed by these floating objects to coastal building structures are complex and multiple, that is, their impact is not an isolated single event, but a multiple, continuous dynamic process. However, the current impact test system for structure design mainly focuses on a single, static single impact scenario, ignoring the continuity and cumulative effect of floating object impact in reality, so there is a significant lack of consistency in the test design.

[0004] In view of this, there is an urgent need to develop a test device that can simulate the process of floating objects impacting structures multiple times and continuously, so as to make up for the shortcomings of existing technologies, improve the consistency and accuracy of the tests, and provide a more reliable scientific basis for the safe design and protection of coastal building structures. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned defects in the prior art and propose a pendulum-type impact test device, which realizes multiple impacts of the pendulum mechanism on the impacted specimen and can accurately control the impact speed of the pendulum mechanism on the impacted specimen.

[0006] The technical solution of the present invention is: a pendulum impact test device, comprising a reaction frame mechanism, wherein an axial pressure applying mechanism is provided on one side of the reaction frame mechanism, and a test piece subjected to impact is arranged on the axial pressure applying mechanism, and a linkage type automatic release electromagnetic suction mechanism is provided on the other side of the corresponding reaction frame mechanism, and a pendulum mechanism is provided between the axial pressure applying mechanism and the linkage type automatic release electromagnetic suction mechanism, and the pendulum mechanism is connected to the reaction frame mechanism through a power lifting control mechanism;

[0007] The pendulum mechanism swings between the axial application mechanism and the linked automatic release electromagnetic suction mechanism, and mechanisms to prevent accidental instability are arranged on both sides of the swing path.

[0008] In the present invention, the reaction frame mechanism comprises:

[0009] Main base;

[0010] Reaction frames, several rows of reaction frames are arranged on the main base, each row of reaction frames includes several reaction frames arranged in the vertical direction, and the rows of reaction frames are symmetrically arranged, the bottom of the reaction frame is fixedly connected to the main base, and the upper parts of the reaction frames in the same row are fixedly connected by a crossbeam;

[0011] A top crossbeam, two symmetrically arranged crossbeams are fixedly connected via the top crossbeam, and the pendulum mechanism is connected to the top crossbeam via a power lifting control mechanism.

[0012] The power lifting control mechanism includes two symmetrically arranged AC asynchronous motors, which are connected to the top crossbeam;

[0013] The output shafts of the two AC asynchronous motors are connected with the inner hexagonal transmission shafts, and the two inner hexagonal transmission shafts are respectively arranged in the inner hexagonal holes at both ends of the swing transmission gear component.

[0014] The pendulum mechanism includes:

[0015] A pendulum is connected to the power lifting control mechanism through a pendulum telescopic rod, and a hammer head is provided on the side of the pendulum facing the impacted test piece;

[0016] A pendulum telescopic rod, the top end of which is fixedly connected to the pendulum transmission gear member, and the bottom end of which is fixedly connected to the pendulum;

[0017] Fixed steel strands, several fixed steel strands are connected between the pendulum transmission gear component and the pendulum.

[0018] The axial pressure mechanism includes:

[0019] A hinged beam is located at one end of the main base and is hingedly connected to the middle of the reaction frame which is symmetrically arranged. Several hinged beams are symmetrically arranged.

[0020] The middle cross beam and the bottom surface of the hinged beam are fixedly connected by the middle cross beam, and weights are symmetrically arranged at both ends of the middle cross beam, and the impact test piece is located between the middle cross beam and the main base;

[0021] The ends of both sides of the middle cross beam are respectively provided with two load-bearing components, including an upper load-bearing component located above the end of the middle cross beam and a lower load-bearing component located below the end of the middle cross beam. The upper load-bearing component and the lower load-bearing component are fixedly connected by several threaded steel bars, and the weight is set on the lower load-bearing component.

[0022] A pad is fixed on the top of the impact test piece, the pad is fixedly connected to the middle cross beam by several bolts, and the force transmission block is clamped and fixed between the pad and the middle cross beam;

[0023] The bottom of the impacted specimen is fixedly connected to the specimen base, and the specimen base is fixedly connected to the main base;

[0024] A lateral cross beam is arranged below the middle cross beam and outside the upper end of the impact test piece, and the lateral cross beam is fixedly connected between the symmetrically arranged reverse frames.

[0025] The linkage type automatic release electromagnetic suction mechanism includes:

[0026] A reaction steel column is fixed on the main base, and an electromagnetic chuck is provided on the side of the reaction steel column facing the impacted test piece;

[0027] A suction cup fixing component, on which the electromagnetic suction cup is fixed, a sensor is provided on the electromagnetic suction cup, and the electromagnetic suction cup is linked to the AC asynchronous motor;

[0028] The telescopic rod and the suction cup fixing component are fixedly connected with the reaction force steel column through the telescopic rod.

[0029] The mechanism to prevent accidental instability includes:

[0030] Fixed groove steel, fixed groove steel is respectively provided on both sides of the pendulum swing path, the fixed groove steels on both sides are symmetrically arranged, and the opposite surfaces of the two fixed groove steels are both in the shape of open grooves;

[0031] The three-axis cylinder is arranged in the open slot of the fixed slot steel and connected to the clamping square steel;

[0032] The rotating clamping shaft is rotatably arranged in the open groove of the fixed groove steel, and a rotating plate is fixed on the rotating clamping shaft;

[0033] The clamping square steel is respectively arranged on both sides of the pendulum swing path, the opposite surfaces of the two clamping square steels are planes, and the other side surfaces of the corresponding clamping square steels are rotatably connected to the rotating plate.

[0034] A horizontal long strip groove is arranged at the connecting side of the clamping square steel and the rotating plate, a hinge shaft is arranged in the long strip groove, the end of the rotating plate is rotatably connected to the hinge shaft, and the rotating plate is rotatably arranged in the long strip groove.

[0035] The two fixed channel-shaped steels are respectively fixed on the reaction force base, and the reaction force base is fixedly connected to the main base.

[0036] The beneficial effects of the present invention are:

[0037] (1) The power lifting control mechanism can quickly adjust the lifting speed of the pendulum by changing the size of the input current. At the same time, the power lifting control mechanism can achieve fast and efficient multiple impacts; by adjusting the length of the telescopic rod and the fixed installation height of the telescopic rod, the angle and height of the electromagnetic suction cup are adjusted to brake and fix the height of the pendulum, so that the pendulum can reach an ideal speed when impacting the component;

[0038] (2) The AC asynchronous motor and the electromagnetic chuck are linked. When the hammer head contacts the electromagnetic chuck, the electromagnetic chuck and the AC asynchronous motor are disconnected, the suction force acting on the pendulum and the force acting on the hammer head by the AC asynchronous motor disappear, and the pendulum swings under the action of its own gravity. Its gravitational potential energy is converted into kinetic energy, which makes it easy to control the speed at which the pendulum hits the impacted specimen;

[0039] (3) During the swinging process, after the pendulum collides with the impacted specimen, the AC asynchronous motor and the electromagnetic chuck are controlled to be powered in conjunction. After the AC asynchronous motor lifts the pendulum to a specified height again, the AC asynchronous motor and the electromagnetic chuck are powered off in conjunction. During the swinging process of the AC asynchronous motor under the action of its own gravity, the AC asynchronous motor hits the impacted specimen again, thereby achieving a reciprocating impact on the impacted specimen. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0041] Figure 2 It is a structural schematic diagram of the pendulum mechanism and the power lifting control mechanism of the present invention;

[0042] Figure 3 It is a structural schematic diagram of the axial pressure applying mechanism of the present invention;

[0043] Figure 4 It is a structural schematic diagram of the linkage type automatic release electromagnetic suction mechanism of the present invention;

[0044] Figure 5 It is a structural schematic diagram of the accident prevention mechanism of the present invention;

[0045] Figure 6 It is a structural explosion diagram of the accident prevention mechanism of the present invention.

[0046] In the figure: 1-1, reaction frame; 1-2, top crossbeam; 1-3, main base; 2-1, AC asynchronous motor; 2-2, pendulum transmission gear component; 2-3, hexagonal transmission shaft; 2-4, fixed steel strand; 2-5, pendulum telescopic rod; 2-6, pendulum; 3-1, hinged beam; 3-2, heavy object; 3-3, load-bearing component; 3-4, impact test piece; 3-5, force transmission block; 3-6, pad; 3-7, threaded steel bar; 3-8 , load-bearing pad; 3-9, specimen base; 3-10, middle beam; 3-11, lateral beam; 3-12 support rod; 4-1, electromagnetic suction cup; 4-2, suction cup fixing component; 4-3, sensor; 4-4, telescopic rod; 4-5, reaction steel column; 5-1, reaction base; 5-2, clamping square steel; 5-3, fixed channel steel; 5-4, three-axis cylinder; 5-5, rotating plate; 5-6, rotating clamping shaft; 5-7, rubber pad. DETAILED DESCRIPTION

[0047] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0048] In the following description, specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0049] like Figure 1 As shown, a pendulum impact test device of the present invention comprises a reaction frame mechanism, a pendulum mechanism, a power lifting control mechanism, an axial pressure applying mechanism, a linkage type automatic release electromagnetic suction mechanism, and an accidental instability prevention mechanism, wherein the pendulum mechanism, the power lifting control mechanism, the linkage type automatic release electromagnetic suction mechanism, and the accidental instability prevention mechanism are all arranged on the reaction frame mechanism. The impacted specimen 3-4 is arranged on the axial pressure applying mechanism, and the impacted specimen is continuously impacted during the reciprocating swing of the pendulum mechanism.

[0050] like Figure 1As shown, the reaction frame mechanism mainly plays a supporting role, including a reaction frame 1-1, a top crossbeam 1-2 and a main base 1-3. The main base 1-3 is in the shape of a quadrilateral plate and is located at the bottom of the entire device. The reaction frame 1-1 is arranged in the vertical direction, and its bottom is fixed on the main base 1-3. In this embodiment, two reaction frames are respectively provided at both sides along the length direction of the main base 1-3, and the reaction frames on both sides are symmetrically arranged. The upper parts of the two reaction frames on the same side along the length direction of the main base are fixedly connected by crossbeams, and the crossbeams on both sides are fixedly connected by the top crossbeam 1-2, and the bottom surface of the top crossbeam 1-2 is fixedly connected to the crossbeam. The power lifting control mechanism and the pendulum mechanism are both arranged on the top crossbeam 1-2.

[0051] An axial pressure applying mechanism is provided at one end of the main base 1-3 in the length direction, and a linkage type automatic release electromagnetic suction mechanism is provided at the other end of the main base 1-3 in the length direction. The middle part of the two symmetrically arranged reaction force frames located at one end of the main base in the length direction is connected with an axial pressure applying mechanism. The linkage type automatic release electromagnetic suction mechanism is arranged on the outside of the reaction force frame. An anti-accidental instability mechanism is provided between the axial pressure applying mechanism and the linkage type automatic release electromagnetic suction mechanism. When the pendulum mechanism swings between the axial pressure applying mechanism and the linkage type automatic release electromagnetic suction mechanism, the anti-accidental instability mechanism is located on the swinging path of the pendulum, which protects the pendulum mechanism.

[0052] The power lifting control mechanism is installed on the lower side of the top cross beam 1-2, and the pendulum mechanism is rotatably connected to the power lifting control mechanism, that is, the pendulum mechanism is connected to the top cross beam 1-2 through the power lifting control mechanism.

[0053] like Figure 2 As shown, the power boost control mechanism includes two AC asynchronous motors 2-1, which are symmetrically arranged, and the two AC asynchronous motors 2-1 are fixedly connected to the top crossbeam 1-2 above them through a fixed plate. In this embodiment, the fixed plate is fixedly connected to the top crossbeam 1-2 by bolts. The output shaft of the AC asynchronous motor 2-1 is connected to the hexagonal transmission shaft 2-3. A pendulum transmission gear component 2-2 is provided between the two AC asynchronous motors 2-1, and the hexagonal transmission shafts 2-3 of the two AC asynchronous motors are respectively inserted into the pendulum transmission gear component 2-2 from both ends of the pendulum transmission gear component 2-2. After the two AC asynchronous motors 2-1 are connected to current, the hexagonal transmission shafts 2-3 on both sides rotate synchronously, thereby driving the pendulum transmission gear component 2-2 to rotate.

[0054] The pendulum mechanism includes a pendulum 2-6, and a hammer head is provided on the side of the pendulum 2-6 facing the axial pressure applying device. During the actual impact process, the shape of the hammer head can be adjusted as needed. The pendulum 2-6 is connected to the power lifting control mechanism through the pendulum telescopic rod 2-5: the bottom end of the pendulum telescopic rod 2-5 is fixedly connected to the pendulum 2-6, and the top end of the pendulum telescopic rod 2-5 is fixedly connected to the pendulum transmission tooth component 2-2 through a bolt. After the power lifting control mechanism is connected to the current, the pendulum 2-6 is driven to swing to a specified height through the rotation of the pendulum transmission tooth component 2-2. At the same time, since the pendulum telescopic rod 2-5 is adjustable in length during the telescopic process, the pendulum 2-6 can be lifted to any height through the reciprocating swing of the pendulum and the joint action with the pendulum telescopic rod 2-5. At the same time, several fixed steel strands 2-4 are connected between the pendulum transmission gear component 2-2 and the pendulum 2-6. The pendulum 2-6 is fixed by the fixed steel strands 2-4 to prevent the pendulum from shaking, thereby changing the impact position on the test piece.

[0055] By changing the input current of the power lifting control mechanism, the reciprocating swing speed of the pendulum 2-6 can be quickly adjusted, thereby achieving rapid and efficient multiple impacts of the hammer head on the test piece 3-4.

[0056] like Figure 3 As shown, the axial pressure applying device includes an articulated beam 3-1, a middle cross beam 3-10, a weight 3-2 and a load-bearing member 3-3. Among them, the middle of the two symmetrically arranged reaction frames located at one end of the length direction of the main base are respectively hinged with an articulated beam 3-1, and the two articulated beams 3-1 are fixedly connected through the middle cross beam 3-10. In this embodiment, the middle cross beam 3-10 and the bottom surface of the articulated beam 3-1 are fixedly connected by bolts. The two ends of the middle cross beam 3-10 are respectively provided with weights 3-2, and the axial load is applied to the impacted specimen 3-4 through the weights 3-2 at the two ends of the middle cross beam 3-10, so as to always maintain a fixed axial pressure on the impacted specimen 3-4. In the process of the articulated beam 3-1 swinging around its hinge point with the reaction frame, the middle cross beam 3-10 is driven to move downward so as to apply an axial load to the specimen.

[0057] The impact test piece 3-4 is located between the middle cross beam 3-10 and the main base 1-3. In this embodiment, a pad 3-6 is fixed to the top of the impact test piece 3-4, and the pad 3-6 and the middle cross beam 3-10 are fixedly connected by several bolts. A force transmission block 3-5 is provided between the top of the impact test piece 3-4 and the middle cross beam 3-10, and the force transmission block 3-5 is fixed between the impact test piece 3-4 and the middle cross beam 3-10 by bolts.

[0058] A specimen base 3-9 is fixed on the main base 1-3 below the impact specimen 3-4, and the bottom end of the impact specimen 3-4 is fixedly connected to the specimen base 3-9.

[0059] A lateral crossbeam 3-11 is provided below the middle crossbeam 3-10 and outside the upper end of the impact specimen 3-4. The lateral crossbeam 3-11 is fixedly connected between two symmetrically arranged reverse frames. The lateral crossbeam 3-11 is used to bear the upper lateral impact reaction force of the specimen 3-4.

[0060] The ends of both sides of the middle cross beam 3-10 are provided with load-bearing components 3-3, and the weight 3-2 is placed on the load-bearing components 3-3. In this embodiment, two load-bearing components 3-3 are provided at each end of the middle cross beam 3-10, wherein the upper load-bearing component is fixed to the top surface of the middle cross beam 3-10 by bolts, the lower load-bearing component is located below the middle cross beam 3-10, and the weight 3-2 is arranged on the lower load-bearing component located below the middle cross beam 3-10. In this embodiment, a support rod 3-12 is fixed to the lower load-bearing component, the weight 3-2 is sleeved on the outside of the support rod 3-12, and the weight is clamped and fixed to the support rod by a nut. The upper and lower load-bearing components are fixedly connected by threaded steel bars 3-7. The threaded steel bars 3-7 are fixedly connected to the upper and lower load-bearing components by threaded connections.

[0061] In this embodiment, a load-bearing pad 3-8 is fixed to the top surface of the lower load-bearing member by bolts, and the bottom end of the support rod 3-12 is fixedly connected to the load-bearing pad 3-8 by welding. By adjusting the weight of the weight 3-2, different loads can be applied to the test piece 3-4.

[0062] like Figure 4 As shown, the linkage type automatic release electromagnetic suction mechanism includes an electromagnetic suction cup 4-1 and a reaction steel column 4-5. In the present application, the reaction steel column 4-5 is fixed to one end of the main base along the length direction, and the bottom end of the reaction steel column 4-5 is fixedly connected to the main base 1-3. The electromagnetic suction cup 4-1 is arranged on the side of the reaction steel column 4-5 facing the pendulum mechanism.

[0063] The electromagnetic sucker 4-1 is fixed on the sucker fixing member 4-2, and the sucker fixing member 4-2 is connected to the reaction steel column 4-5 through the upper and lower telescopic rods 4-4. In this embodiment, the sucker fixing member 4-2 is in a rectangular parallelepiped shape, and the sucker fixing member 4-2 is inclined. The electromagnetic sucker 4-1 is fixed on the lower surface of the sucker fixing member 4-2 facing the pendulum mechanism. In this embodiment, the electromagnetic sucker and the sucker fixing member are fixedly connected by bolts.

[0064] The two inclined sides of the suction cup fixing member 4-2 facing the reaction steel column are connected to the reaction steel column 4-5 through the upper telescopic rod and the lower telescopic rod respectively, one end of the upper and lower telescopic rods is hinged to the reaction steel column, and the other end of the upper and lower telescopic rods is fixedly connected to the suction cup fixing member 4-2. The length of the upper and lower telescopic rods is adjustable, so by adjusting the length of the upper and lower telescopic rods and adjusting the installation height of the suction cup fixing member, the angle and height of the electromagnetic suction cup 4-1 can be adjusted, so as to brake and fix the height of the pendulum 2-6, so that the pendulum 2-6 can reach the desired speed when impacting the member 3-4.

[0065] After the electromagnetic suction cup 4-1 is powered on, it obtains magnetic force to magnetically fix the pendulum 2-6. A sensor 4-3 is fixed on the surface of the electromagnetic suction cup 4-1. When the pendulum 2-6 hits the sensor 4-3 during its swing, the electromagnetic suction cup 4-1 and the motor 2-1 are linked to each other and the pendulum 2-6 swings downward under the action of its own gravity. Through the suction force generated by the electromagnetic suction cup 4-1 on the pendulum 2-6, when the electromagnetic suction cup 4-1 is connected to the pendulum 2-6 through the electromagnetic suction force, the speed of the pendulum 2-6 is zero. In other words, the initial speed of the pendulum during the impact test piece 4 is reset to zero through the electromagnetic suction cup 4-1. When the initial speed of the pendulum impacting the impact test piece 4 is zero, when the electromagnetic suction cup 4-1 is powered off, the gravitational potential energy of the pendulum is converted into kinetic energy, that is, the speed of the pendulum is completely converted from its gravitational potential energy, which is convenient for controlling the impact speed of the pendulum on the impact test piece.

[0066] like Figure 5 and Figure 6 As shown, the mechanism for preventing accidental instability includes two symmetrically arranged reaction bases 5-1, which are arranged on both sides of the path of the reciprocating swing of the pendulum, and the reaction bases 5-1 are fixed on the main base 1-3. Clamping parts are respectively arranged on the opposite surfaces of the two reaction bases 5-1, and the pendulum can be fixedly clamped by the joint action of the clamping parts on both sides.

[0067] The clamping part includes a fixed groove steel 5-3, one side of which is fixedly connected to the opposite surface of the two reaction bases 5-1, and a clamping square steel 5-2 is arranged in the groove of the other side of the corresponding fixed groove steel 5-3, and the clamping square steel 5-2 is rotatably arranged in the groove. The clamping square steels 5-2 on both sides are symmetrically arranged, and rubber pads 5-7 are respectively fixed on the opposite surfaces of the two clamping square steels 5-2 to reduce the damage of the pendulum 2-6 to the anti-accidental instability mechanism.

[0068] In this embodiment, a three-axis cylinder 5-4 is fixed in the groove of the fixed groove steel 5-3. In this embodiment, the three-axis cylinder 5-4 is fixed in the groove of the fixed groove steel 5-3 by bolts. The telescopic end of the three-axis cylinder 5-4 is fixedly connected to the side wall of the groove of the clamping square steel 5-2 facing the fixed groove steel. At the same time, the clamping square steel 5-2 is also rotatably connected to the rotating clamping shaft 5-6 through the rotating plate 5-5. The rotating clamping shaft 5-6 is fixedly connected to the fixed groove steel 5-3 by bolts, one end of the rotating plate 5-5 is rotatably sleeved on the outside of the rotating clamping shaft 5-6, and the other end of the rotating plate 5-5 is rotatably connected to the clamping square steel 5-2. A long strip groove is provided on the side of the groove of the clamping square steel 5-2 facing the fixed groove steel, and a rotating shaft is fixed in the long strip groove. One end of the rotating plate 5-5 is rotatably sleeved on the outside of the rotating shaft, and the end of the rotating plate 5-5 is slidably arranged in the long strip groove.

[0069] During the operation of the three-axis cylinder 5-4, the clamping square steel 5-2 will be pushed to move into the groove or outside the groove. However, since the clamping square steel 5-2 is connected to the rotating clamping shaft 5-6 through the rotating plate 5-5, the clamping square steel will be limited by the rotating clamping shaft 5-6, resulting in the clamping square steel can only rotate along the rotating clamping shaft 5-6. Therefore, during the operation of the three-axis cylinder 5-4, a thrust or a pulling force is applied to one end of the clamping square steel 5-2, so that the clamping square steel 5-2 rotates around the rotating clamping shaft 5-6. When the clamping square steels 5-2 on both sides act at the same time, the angles of the clamping square steels 5-2 are tilted, so that the clamping direction steels 5-2 on both sides can clamp the pendulum 2-6, preventing the pendulum from causing damage to the outside world due to accidents.

[0070] The three-axis cylinder 5-4 is externally connected to an ASP pilot regulating valve and a three-position five-way intermediate exhaust valve to control the running stroke and running speed of the three-axis cylinder 5-4.

[0071] The test process using the device is as follows. According to the impact speed of the pendulum 2-6 required for the test, the length of the pendulum telescopic rod 2-5 and the height of the electromagnetic suction cup 4-1 in the linkage automatic release electromagnetic suction mechanism are adjusted. The AC asynchronous motor 2-1 in the power lifting control mechanism is energized to lift the pendulum 2-6 to a predetermined height; by increasing the current, the lifting speed of the pendulum 2-6 is increased.

[0072] When the pendulum 2-6 is lifted to a predetermined height, the pendulum 2-6 touches the sensor 4-3 on the electromagnetic suction cup 4-1, and the sensor 4-3 controls the linkage type automatic release electromagnetic suction mechanism and the power lifting control mechanism to cut off the power at the same time, and the pendulum 2-6 falls and swings. During the swinging process, the pendulum 2-6 hits the impacted specimen 3-4, completing an impact. After completing an impact, the AC asynchronous motor 2-1 is powered, and the electromagnetic suction cup 4-1 is also powered at the same time. At this time, the AC asynchronous motor 2-1 lifts the pendulum to a predetermined height again, and completes the impact on the impacted specimen again. Repeating the above working process, multiple impact tests on the impacted specimen can be completed.

[0073] The above is a detailed introduction to a pendulum impact test device provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the present invention. Various modifications to these embodiments will be obvious to professionals and technicians in this field, and the general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this article, but will conform to the widest scope consistent with the principles and novel features disclosed in this article.

Claims

1. A pendulum impact test device, comprising a reaction frame mechanism, characterized in that: An axial pressure applying mechanism is provided on one side of the reaction frame mechanism, and the impacted test piece is arranged on the axial pressure applying mechanism. A linkage type automatic release electromagnetic suction mechanism is provided on the other side of the corresponding reaction frame mechanism. A pendulum mechanism is provided between the axial pressure applying mechanism and the linkage type automatic release electromagnetic suction mechanism. The pendulum mechanism is connected to the reaction frame mechanism through a power lifting control mechanism. The pendulum mechanism swings between the axial application mechanism and the linked automatic release electromagnetic suction mechanism, and mechanisms to prevent accidental instability are arranged on both sides of the swing path.

2. A pendulum impact test device according to claim 1, characterized in that: The reaction frame mechanism comprises: Main base; Reaction frames, several rows of reaction frames are arranged on the main base, each row of reaction frames includes several reaction frames arranged in the vertical direction, and the rows of reaction frames are symmetrically arranged, the bottom of the reaction frame is fixedly connected to the main base, and the upper parts of the reaction frames in the same row are fixedly connected by a crossbeam; A top crossbeam, two symmetrically arranged crossbeams are fixedly connected via the top crossbeam, and the pendulum mechanism is connected to the top crossbeam via a power lifting control mechanism.

3. A pendulum impact test device according to claim 2, characterized in that: The power lifting control mechanism includes two symmetrically arranged AC asynchronous motors, which are connected to the top crossbeam; The output shafts of the two AC asynchronous motors are connected with the inner hexagonal transmission shafts, and the two inner hexagonal transmission shafts are respectively arranged in the inner hexagonal holes at both ends of the swing transmission gear component.

4. A pendulum impact test device according to claim 3, characterized in that: The pendulum mechanism includes: A pendulum is connected to the power lifting control mechanism through a pendulum telescopic rod, and a hammer head is provided on the side of the pendulum facing the impacted test piece; A pendulum telescopic rod, the top end of which is fixedly connected to the pendulum transmission gear member, and the bottom end of which is fixedly connected to the pendulum; Fixed steel strands, several fixed steel strands are connected between the pendulum transmission gear component and the pendulum.

5. A pendulum impact test device according to claim 2, characterized in that: The axial pressure mechanism includes: A hinged beam is located at one end of the main base and is hingedly connected to the middle of the reaction frame which is symmetrically arranged. Several hinged beams are symmetrically arranged. The middle cross beam and the bottom surface of the hinged beam are fixedly connected by the middle cross beam, and weights are symmetrically arranged at both ends of the middle cross beam, and the impact test piece is located between the middle cross beam and the main base; The ends of both sides of the middle cross beam are respectively provided with two load-bearing components, including an upper load-bearing component located above the end of the middle cross beam and a lower load-bearing component located below the end of the middle cross beam. The upper load-bearing component and the lower load-bearing component are fixedly connected by several threaded steel bars, and the weight is set on the lower load-bearing component.

6. A pendulum impact test device according to claim 5, characterized in that: A pad is fixed on the top of the impact test piece, the pad is fixedly connected to the middle cross beam by several bolts, and the force transmission block is clamped and fixed between the pad and the middle cross beam; The bottom of the impacted specimen is fixedly connected to the specimen base, and the specimen base is fixedly connected to the main base; A lateral cross beam is arranged below the middle cross beam and outside the upper end of the impact test piece, and the lateral cross beam is fixedly connected between the symmetrically arranged reverse frames.

7. A pendulum impact test device according to claim 3, characterized in that: The linkage type automatic release electromagnetic suction mechanism includes: A reaction steel column is fixed on the main base, and an electromagnetic chuck is provided on the side of the reaction steel column facing the impacted test piece; A suction cup fixing component, on which the electromagnetic suction cup is fixed, a sensor is provided on the electromagnetic suction cup, and the electromagnetic suction cup is linked to the AC asynchronous motor; The telescopic rod and the suction cup fixing component are fixedly connected with the reaction force steel column through the telescopic rod.

8. The pendulum impact test device according to claim 2, characterized in that: The mechanism to prevent accidental instability includes: Fixed groove steel, fixed groove steel is respectively provided on both sides of the pendulum swing path, the fixed groove steels on both sides are symmetrically arranged, and the opposite surfaces of the two fixed groove steels are both in the shape of open grooves; The three-axis cylinder is arranged in the open slot of the fixed slot steel and connected to the clamping square steel; The rotating clamping shaft is rotatably arranged in the open groove of the fixed groove steel, and a rotating plate is fixed on the rotating clamping shaft; The clamping square steel is respectively arranged on both sides of the pendulum swing path, the opposite surfaces of the two clamping square steels are planes, and the other side surfaces of the corresponding clamping square steels are rotatably connected to the rotating plate.

9. A pendulum impact test device according to claim 8, characterized in that: A horizontal long strip groove is arranged at the connecting side of the clamping square steel and the rotating plate, a hinge shaft is arranged in the long strip groove, the end of the rotating plate is rotatably connected to the hinge shaft, and the rotating plate is rotatably arranged in the long strip groove.

10. The pendulum impact test device according to claim 8, characterized in that: The pairs of fixed channel-shaped steels are respectively fixed on the reaction base, and the reaction base is fixedly connected to the main base.

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