Impact test equipment and test method for crash barrier

Abstract

The invention relates to the technical field of impact testing, in particular to impact testing equipment and a testing method for an anti-collision guardrail, the anti-collision guardrail can rotate on a vertical plane by designing a placing frame capable of swinging around a swinging shaft, so that impact forces in different directions on a horizontal plane are simulated, and the impact testing efficiency is improved. The impact mechanism is arranged on the anti-collision guardrail, and an adjusting assembly in the impact mechanism is adjusted to enable the punching head to perform impact test on the anti-collision guardrail at different angles, so that the data group number of the impact test is further increased, the representativeness of the test data is improved, and the impact resistance of the anti-collision guardrail is effectively and comprehensively evaluated.

Description

Technical Field

[0001] The present application relates to the technical field of impact testing, and in particular to an impact testing device and a testing method for an anti-collision guardrail. Background Art

[0002] A crash barrier is a safety facility usually used in roads, bridges, parking lots, etc. Its purpose is to reduce the possibility of injury or damage to vehicles or pedestrians caused by unexpected collisions.

[0003] After the anti-collision guardrail is manufactured, it is usually necessary to perform a collision impact test to determine whether it is qualified. For example, the patent application with publication number CN221840699U discloses a highway guardrail anti-collision test device, which belongs to the field of guardrail detection technology. This prior art drives the wire drum to rotate through a driving motor, and can pull the counterweight box from the bottom end to the top of the acceleration frame through a traction line, and then push the counterweight box to slide down along the moving groove under the action of the rotating roller. Under the action of the counterweight box's own gravity, the gravitational potential energy of the counterweight box will be converted into kinetic energy. When the counterweight box slides to the bottom, the speed increases rapidly, so that the impact force it generates is larger, which can well simulate the effect of vehicle collision, reduce the test error, and improve the authority of the test data.

[0004] Since construction site guardrails and crash barriers belong to the same field, the above patent application can be used to test crash barriers. However, the following problems still exist in the process of testing crash barriers using the above patent application: the moving slot in the test device is a fixed design, which means that the counterweight box can only move in one direction. The limited impact direction cannot fully simulate the impact scenarios that vehicles may cause from different directions in actual use. Therefore, the test data and results may have certain limitations and cannot fully reflect the performance of crash barriers in actual applications.

[0005] In addition, patent application with publication number CN220305055U discloses a bridge guardrail anti-collision performance detection device, which relates to the field of guardrail collision test technology. This prior art can quickly adjust the impact angle between the guardrail and the collision trolley according to the impact test requirements to obtain more detailed multi-angle collision test data.

[0006] Although the above patent application can obtain collision test data at different angles, the anti-collision guardrails in most practical applications are installed vertically to the ground, and the vertical installation angle accounts for the majority of anti-collision practices. Therefore, the traditional collision test device directly changes the installation angle of the guardrail, which is difficult to accurately reflect the anti-collision performance of most actual anti-collision guardrails in vertical installation conditions, resulting in insufficient representativeness of the test data.

[0007] Based on this, there is still room for improvement when using the above patent application to test crash barriers. Summary of the invention

[0008] In order to solve the above technical problems, the present application provides an impact test device and a test method for an anti-collision guardrail, which adopts the following technical solutions: In a first aspect, an impact testing device for a crash barrier comprises a horizontal frame on which a placement frame for placing the crash barrier and an impact mechanism for applying an external force to the crash barrier are sequentially mounted.

[0009] The placement rack is detachably mounted on the horizontal rack.

[0010] The impact mechanism comprises: a punching frame, which is mounted on a horizontal frame through a hinge shaft, and a counterweight block is slidably arranged on the horizontal frame.

[0011] The punching head is installed on the side of the counterweight block close to the placement frame.

[0012] The adjusting assembly is mounted on the horizontal frame and is used to adjust the angle of the punching frame.

[0013] An infrared rangefinder is installed on the side of the placement rack away from the punching machine frame.

[0014] Preferably, the placement rack includes a transverse plate extending along the width direction of the horizontal frame, and vertical plates are symmetrically installed on the transverse plate along its length direction, and placement grooves that are engaged with the anti-collision guardrail are opened on opposite surfaces of the vertical plates.

[0015] Preferably, the horizontal frame is provided with a connecting frame that cooperates with the transverse plate, and a swing shaft is installed on the connecting frame through a bearing, and the transverse plate is installed on the swing shaft, and limit rods are slidably arranged on both ends of the transverse plate, and the horizontal frame is provided with two groups of limit grooves distributed along the circumference of the swing shaft and cooperating with the corresponding side limit rods.

[0016] Preferably, a telescopic frame matched with the infrared rangefinder is installed on the placement rack, an electric slider is installed on the telescopic frame, and the infrared rangefinder is installed on the electric slider.

[0017] Preferably, a plurality of counterweight grooves are evenly formed on the counterweight block along the length direction of the stamping machine frame, and counterweight connecting blocks are arranged inside the counterweight grooves.

[0018] Preferably, the punching head comprises a fixing frame connected to the counterweight, and the punching head is mounted on an end of the fixing frame away from the counterweight.

[0019] Preferably, the punching head is mounted on a fixing frame via a hinge, and a plurality of punching connecting plates which are mutually clamped and used to expand the area of ​​the punching head are arranged on the side wall of the punching head.

[0020] Preferably, the adjustment assembly includes: a supporting frame installed on a horizontal frame.

[0021] The adjusting block is slidably arranged on the supporting frame, a limiting column is slidably arranged through the adjusting block, and a plurality of limiting holes matching with the limiting column are evenly opened on the supporting frame along its length direction.

[0022] The adjusting frame is installed on the adjusting block through a hinge, and one end of the adjusting frame away from the adjusting block is installed on the punching machine frame through a hinge.

[0023] Preferably, the support frame is provided with indicator lines corresponding one to one with the limiting holes, and the adjustment block is provided with a reference line matching with the limiting column.

[0024] In a second aspect, an impact test method for a crash barrier is provided, and the method of use of the method comprises the following steps: S1: placement processing, wherein the crash barrier is clamped inside a placement frame.

[0025] S2: Configuration selection, select a punch head with a suitable area, select a suitable number of counterweight blocks, and then change the inclination angle of the punch frame and the rotation angle of the anti-collision guardrail.

[0026] S3: Impact test, which allows the counterweight to slide freely downward along the horizontal frame and impact the anti-collision guardrail through the punch head.

[0027] S4: Detection processing, using an infrared rangefinder to detect whether the anti-collision guardrail is deformed after the impact test.

[0028] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present invention designs a placement frame that can swing around a swing axis, so that the anti-collision guardrail can rotate on the vertical plane, thereby simulating impact forces in different directions on the horizontal plane, and by adjusting the adjustment components in the impact mechanism, the punch head performs impact tests on the anti-collision guardrail at different angles, further increasing the number of data groups for the impact test, improving the representativeness of the test data, and effectively and comprehensively evaluating the impact resistance of the anti-collision guardrail.

[0029] 2. In the punching head of the present invention, multiple punching connecting plates can change the contact area between the punching head and the anti-collision guardrail, thereby simulating the scene of impact objects of different sizes colliding with the anti-collision guardrail when the anti-collision guardrail is hit, further making the anti-collision guardrail impact test data representative to a certain extent.

[0030] 3. During the movement of the electric slider of the present invention, it can drive the infrared rangefinder to detect the deformation of the anti-collision guardrail after the collision. If the measured distance of the infrared rangefinder in a single stroke is the same, it indicates that the anti-collision guardrail has not been deformed or the deformation is within the allowable range. Otherwise, the anti-collision guardrail has been deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0032] Figure 2 It is a schematic diagram of the three-dimensional installation structure between the transverse plate, the connecting frame and the telescopic frame of the present invention.

[0033] Figure 3 The present invention Figure 2 A partial enlarged view of point A in the middle.

[0034] Figure 4 It is a schematic diagram of the three-dimensional installation structure among the support frame, the adjustment block and the punching frame of the present invention.

[0035] Figure 5 The present invention Figure 4 A partial enlarged view of point B in the middle.

[0036] Figure 6 It is a schematic diagram of the three-dimensional installation structure among the horizontal frame, telescopic cylinder, impact block and adjustment plate of the present invention.

[0037] Figure 7 It is a schematic diagram of the three-dimensional installation structure between the punching machine frame and the extension plate etc. of the present invention.

[0038] Figure 8 It is a flow chart of the impact test of the anti-collision guardrail of the present invention.

[0039] Explanation of the reference numerals: 1. horizontal frame; 100. anti-collision guardrail; 11. impact block; 12. telescopic cylinder; 13. adjustment plate; 2. placement rack; 21. transverse plate; 211. connecting frame; 212. swing shaft; 213. limit rod; 214. limit groove; 22. vertical plate; 3. impact mechanism; 31. stamping frame; 311. extension plate; 32. counterweight block; 321. counterweight groove; 322. counterweight connecting block; 33. stamping head; 331. stamping connecting plate; 332. fixing frame; 34. adjustment assembly; 341. supporting frame; 342. adjustment block; 343. limit column; 344. limit hole; 345. adjustment frame; 346. indicator line; 347. reference line; 4. infrared rangefinder; 41. telescopic frame; 42. electric slider. DETAILED DESCRIPTION

[0040] The following is combined with Figures 1 to 8 This application is described in further detail.

[0041] The embodiment of the present application discloses an impact testing device and a testing method for an anti-collision guardrail, which can obtain multiple groups of representative impact test data by applying impact forces of different sizes and directions to the anti-collision guardrail, so as to make the test results more comprehensive and accurate, and can more truly reflect the stress condition and performance of the anti-collision guardrail in actual use.

[0042] Embodiment 1: Reference Figure 1 An impact testing device for a crash barrier comprises a horizontal frame 1, on which a placement frame 2 for placing a crash barrier 100 and an impact mechanism 3 for applying an external force to the crash barrier 100 are sequentially mounted.

[0043] The placement rack 2 is detachably mounted on the horizontal rack 1 .

[0044] Reference Figure 2 The placement rack 2 includes a transverse plate 21 extending along the width direction of the horizontal frame 1, and vertical plates 22 are symmetrically installed on the transverse plate 21 along its length direction. The opposite surfaces of the vertical plates 22 are provided with placement grooves that are engaged with the anti-collision guardrail 100.

[0045] The placement frame 2 can drive the anti-collision guardrail 100 to rotate on the vertical plane, so that there is a certain angle between the anti-collision guardrail 100 and the punch head 33 in the horizontal plane, simulating the impact and collision scene of the anti-collision guardrail 100 by forces in different directions on the horizontal plane, and at the same time increasing the number of groups of impact test data of the anti-collision guardrail 100, so that the test data of the anti-collision guardrail 100 has a certain representativeness.

[0046] Reference Figure 1 The impact mechanism 3 includes: a punching frame 31, which is installed on a horizontal frame 1 through a hinge shaft, and a counterweight block 32 is slidably arranged on the horizontal frame 1.

[0047] The punching head 33 is installed on one side of the counterweight block 32 close to the placement rack 2 .

[0048] The adjustment assembly 34 is installed on the horizontal frame 1 and is used to adjust the angle of the punching frame 31 .

[0049] During specific operation, the anti-collision guardrail 100 is placed between the two vertical plates 22 and the anti-collision guardrail 100 is inserted between the placement slots. At this time, the counterweight 32 is moved to the end of the stamping frame 31 away from the horizontal frame 1 through external force (cylinder push, etc.). At this time, the counterweight 32 is released (so that the angle between the stamping frame 31 and the horizontal frame 1 is constant). The counterweight 32 is not subject to external restraint force and slides freely along the stamping frame 31. When the counterweight 32 slides to the bottom of the stamping frame 31, the counterweight 32 drives the punching head 33 to perform an impact test on the anti-collision guardrail 100 that has not been deflected in the vertical direction.

[0050] An electronic pressure gauge (not shown in the figure) for monitoring the instantaneous force of the punch head 33 impacting the anti-collision guardrail 100 is also installed on the horizontal frame 1. Since the electronic pressure gauge is a prior art, it will not be described in detail later.

[0051] An infrared rangefinder 4 is installed on the side of the placement rack 2 away from the punching machine frame 31 .

[0052] Reference Figure 1 A telescopic frame 41 matching with the infrared rangefinder 4 is installed on the placement frame 2 , an electric slider 42 is installed on the telescopic frame 41 , and the infrared rangefinder 4 is installed on the electric slider 42 .

[0053] After the impact test of the punch head 33 is performed on the anti-collision guardrail 100 in this state, the electric slider 42 is started, and the infrared rangefinder 4 is driven to move during the movement of the electric slider 42. If the measured distances of the infrared rangefinder 4 in each time period in a single stroke of the electric slider 42 are the same, it indicates that the anti-collision guardrail 100 has not been deformed or the deformation is within the allowable range. Otherwise, the anti-collision guardrail 100 has been deformed. At this time, the reading of the electronic pressure gauge is read out, which is also the minimum impact force for the deformation of the anti-collision guardrail 100.

[0054] Replay Figure 1 In order to increase the number of test data groups and ensure the representativeness of the test data, the counterweight connecting block 322 provided by the present invention can change the instantaneous pressure of the punch head 33 impacting the anti-collision guardrail 100. Specifically, a plurality of counterweight grooves 321 are evenly opened on the counterweight block 32 along the length direction of the punch frame 31, and a counterweight connecting block 322 is arranged inside the counterweight groove 321.

[0055] The density of the counterweight connecting block 322 is much greater than that of the counterweight block 32. The weight of the counterweight block 32 can be changed by changing the number of the counterweight connecting blocks 322 inside the counterweight block 32. In specific operation, when the anti-collision guardrail 100 in this state does not deform after the impact test of the punch head 33, the number of the counterweight connecting blocks 322 is increased to increase the weight of the counterweight block 32, and the counterweight connecting block 322 is clamped in the counterweight slot 321, thereby increasing the gravitational potential energy of the counterweight block 32 during the downward movement of the punch frame 31. The instantaneous pressure of the punch head 33 impacting the anti-collision guardrail 100 can be increased, and the above steps of the punch head 33 impacting the anti-collision guardrail 100 can be repeated. If the measured distances of the infrared rangefinder 4 in each period of a single stroke of the electric slider 42 are the same, it indicates that the anti-collision guardrail 100 has not been deformed or the deformation is within the allowable range. Continue to increase the number of counterweight blocks 322 until the anti-collision guardrail 100 is deformed. At this time, read the reading of the electronic pressure gauge, which is the minimum impact force for the anti-collision guardrail 100 to deform in this state.

[0056] Reference Figure 3The horizontal frame 1 is provided with a connecting frame 211 matched with the horizontal plate 21, and a swing shaft 212 is installed on the connecting frame 211 through a bearing, and the horizontal plate 21 is installed on the swing shaft 212, and limit rods 213 are slidably provided on both ends of the horizontal plate 21, and two groups of limit grooves 214 distributed circumferentially along the swing shaft 212 and matched with the corresponding side limit rods 213 are provided on the horizontal frame 1.

[0057] The connecting frame 211 is symmetrically and slidably provided with a limiting round rod along its length direction, and the limiting round rod can fix the connecting frame 211 on the horizontal frame 1. At this time, the limiting rod 213 is pulled out and the transverse plate 21 is rotated. After the transverse plate 21 rotates a certain angle around the swing axis 212, the limiting rod 213 is inserted into the limiting groove 214 through the transverse plate 21. At this time, the transverse plate 21 is fixedly installed on the horizontal frame 1 through the limiting rod 213, and the transverse plate 21 drives the anti-collision guardrail 100 to deflect a certain angle in the vertical direction.

[0058] During specific operation, the counterweight 32 is released (so that the angle between the stamping frame 31 and the horizontal frame 1 is constant). The counterweight 32 is not subject to external restraining force and slides freely along the stamping frame 31. When the counterweight 32 slides to the bottom of the stamping frame 31, the counterweight 32 drives the punching head 33 to perform an impact test on the anti-collision guardrail 100 in this state (that is, deflected at a certain angle in the vertical direction). After the anti-collision guardrail 100 in this state is impact tested by the punching head 33, the electric slider 42 is started. During the movement of the electric slider 42, the infrared rangefinder 4 is driven to move. If the measured distance of the infrared rangefinder 4 in each time period in a single stroke of the electric slider 42 is the same, it indicates that the anti-collision guardrail 100 has not been deformed or the deformation is within the allowable range. Otherwise, the anti-collision guardrail 100 has been deformed. At this time, the reading of the electronic pressure gauge is read, which is the minimum impact force for the deformation of the anti-collision guardrail 100.

[0059] When the anti-collision guardrail 100 in this state does not deform after the impact test of the punch head 33, the number of counterweight blocks 322 is increased to increase the weight of the counterweight block 32, and the counterweight block 322 is clamped in the counterweight slot 321, thereby increasing the gravitational potential energy of the counterweight block 32 in the process of moving downward along the punch frame 31, thereby increasing the instantaneous pressure of the punch head 33 impacting the anti-collision guardrail 100, repeating the above steps of the punch head 33 impacting the anti-collision guardrail 100, if the measured distances of the infrared rangefinder 4 in each time period in a single stroke of the electric slider 42 are the same, it indicates that the anti-collision guardrail 100 has not deformed or the deformation is within the allowable range, and the number of counterweight blocks 322 is continued to be increased until the anti-collision guardrail 100 is deformed, and the reading of the electronic pressure gauge is read at this time, which is the minimum impact force for the anti-collision guardrail 100 to deform in this state.

[0060] Furthermore, through the above steps, the scenario in which the anti-collision guardrail 100 is subjected to impact forces in different directions on the horizontal plane can be simulated.

[0061] In the impact mechanism 3, the adjustment component 34 can change the angle between the stamping frame 31 and the horizontal frame 1, so that the counterweight block 32 can perform an impact test on the anti-collision guardrail 100 with impact forces at different angles during the downward sliding process along the stamping frame 31, simulating the impact and collision scene of the anti-collision guardrail 100 by forces in different directions on the vertical plane, and at the same time increasing the number of groups of impact test data of the anti-collision guardrail 100, so that the test data of the anti-collision guardrail 100 is more representative.

[0062] Reference Figure 4 as well as Figure 5 The adjustment component 34 includes: a supporting frame 341, which is installed on the horizontal frame 1.

[0063] The adjusting block 342 is slidably arranged on the supporting frame 341 , and a limiting column 343 is slidably arranged on the adjusting block 342 . A plurality of limiting holes 344 cooperating with the limiting column 343 are evenly opened on the supporting frame 341 along its length direction.

[0064] The adjusting frame 345 is mounted on the adjusting block 342 through a hinge, and one end of the adjusting frame 345 away from the adjusting block 342 is mounted on the punching machine frame 31 through a hinge.

[0065] During specific operation, the position of the anti-collision guardrail 100 is fixed, and the counterweight 32 is released at this time. The counterweight 32 is not subject to external restraint force and slides freely along the punch frame 31. When the counterweight 32 slides to the bottom of the punch frame 31, the counterweight 32 drives the punch head 33 to impact downward on the anti-collision guardrail 100 in this state and performs an impact test. After the anti-collision guardrail 100 in this state is impacted by the punch head 33, the electric slider 42 is started. During the movement of the electric slider 42, the infrared rangefinder 4 is driven to move. If the measured distance of the infrared rangefinder 4 in each time period in a single stroke of the electric slider 42 is the same, it indicates that the anti-collision guardrail 100 has not been deformed or the deformation is within the allowable range. Otherwise, the anti-collision guardrail 100 is deformed. At this time, the reading of the electronic pressure gauge is read, which is the minimum impact force for the deformation of the anti-collision guardrail 100.

[0066] When the anti-collision guardrail 100 in this state does not deform after the impact test of the punch head 33, the number of counterweight blocks 322 is increased to increase the weight of the counterweight block 32, and the counterweight block 322 is clamped in the counterweight slot 321, thereby increasing the gravitational potential energy of the counterweight block 32 in the process of moving downward along the punch frame 31, thereby increasing the instantaneous pressure of the punch head 33 impacting the anti-collision guardrail 100, repeating the above steps of the punch head 33 impacting the anti-collision guardrail 100, if the measured distances of the infrared rangefinder 4 in each time period in a single stroke of the electric slider 42 are the same, it indicates that the anti-collision guardrail 100 has not deformed or the deformation is within the allowable range, and the number of counterweight blocks 322 is continued to be increased until the anti-collision guardrail 100 is deformed, and the reading of the electronic pressure gauge is read at this time, which is the minimum impact force for the anti-collision guardrail 100 to deform in this state.

[0067] After the above impact test is completed, remove the limit column 343 and move the adjustment block 342. At this time, change the angle between the stamping frame 31 and the horizontal frame 1, and move the limit column 343 downward so that the limit column 343 is clamped in the corresponding limit hole 344. Repeat the above actions to apply external forces in different directions to the anti-collision guardrail 100 on the vertical plane to obtain multiple sets of impact test data, thereby making the test data more representative.

[0068] Furthermore, through the above steps, the scene where the anti-collision guardrail 100 is subjected to impact forces in different directions on the vertical plane can be simulated.

[0069] It should be noted that as the angle between the punch frame 31 and the horizontal frame 1 increases, the height of the end of the punch frame 31 away from the horizontal frame 1 gradually decreases. Therefore, the gravitational potential energy of the counterweight 32 decreases as the height of the end of the punch frame 31 away from the horizontal frame 1 decreases. In order to ensure that the counterweight 32 has the same gravitational potential energy when impacting the anti-collision guardrail 100 when the angles between the punch frame 31 and the horizontal frame 1 are different, it is often necessary to move the counterweight 32 upward a certain distance along the inclination direction of the punch frame 31, and then use the height of the counterweight 32 to compensate for the height of the punch frame 31, so as to control the variables in the impact process of the anti-collision guardrail 100, avoid the different gravitational potential energy of the counterweight 32 resulting in different forces impacting the anti-collision guardrail 100, thereby causing test errors of the anti-collision guardrail 100 and affecting the test effect of the anti-collision guardrail 100.

[0070] Due to different requirements for the collision damage deformation of the anti-collision guardrail 100 in different usage environments (that is, in some environments, the anti-collision guardrail 100 can be used even if the deformation is large), the telescopic frame 41 is composed of plates that slide together with each other, so that the distance between the infrared rangefinder 4 and the placement frame 2 can be variable. When testing some anti-collision guardrails 100 that do not require high collision damage (that is, they can be used even if the collision deformation is large), the telescopic frame 41 is pulled outward to increase the distance between the infrared rangefinder 4 and the anti-collision guardrail 100, thereby making the device more applicable.

[0071] Reference Figure 4 The punch head 33 includes a fixing frame 332 connected to the counterweight 32 , and the punch head 33 is installed at one end of the fixing frame 332 away from the counterweight 32 .

[0072] The punch head 33 is mounted on the fixing frame 332 via a hinge, and a plurality of punch connecting plates 331 which are mutually clamped and used to expand the area of ​​the punch head 33 are arranged on the side wall of the punch head 33 .

[0073] During the above-mentioned impact test of the anti-collision guardrail 100, the area between the punch head 33 and the anti-collision guardrail 100 can be changed by changing the number of punch connecting plates 331 on the punch head 33, thereby simulating a collision scenario in which the anti-collision guardrail 100 is subjected to objects with different collision areas, thereby improving the representativeness of the equipment for the impact test of the anti-collision guardrail 100. The punch head 33 is installed on the fixed frame 332 by a hinge to ensure that the punch head 33 is always in contact with the anti-collision guardrail 100 when impacting the anti-collision guardrail 100, thereby reducing the possibility of rigid fracture at the contact point between the punch head 33 and the fixed frame 332 when colliding with the anti-collision guardrail 100.

[0074] Reference Figure 5 The support frame 341 is provided with indication lines 346 corresponding to the limiting holes 344 , and the adjustment block 342 is provided with reference lines 347 matching with the limiting columns 343 .

[0075] When inserting the limiting column 343 , it is only necessary to align the reference line 347 with the reference line 347 to avoid the limiting column 343 and the limiting hole 344 not being aligned and affecting the smoothness of the limiting column 343 being inserted into the limiting hole 344 .

[0076] Example 2: Reference Figure 6On the basis of the first embodiment, the impact block 11 and the adjustment plate 13 designed by the present invention cooperate with each other to apply an oblique upward pressure to the anti-collision guardrail 100. Specifically, a plug interface that cooperates with the limiting round rod is symmetrically provided along the width direction of the horizontal frame 1 on the top of the horizontal frame 1 and away from the side of the stamping frame 31. A limiting slide groove is provided in the middle of the horizontal frame 1. The impact block 11 is provided at one end of the limiting slide groove close to the stamping frame 31 for limiting sliding. A rectangular groove is also provided in the middle of the horizontal frame 1. A telescopic cylinder 12 is installed inside the rectangular groove. A resistance block is installed at the telescopic end of the telescopic cylinder 12. An adjusting plate 13 that cooperates with the impact block 11 is installed on one side of the rectangular groove close to the impact block 11 through a hinge.

[0077] During the specific operation, the connecting frame 211 is removed, and the connecting frame 211 is moved to the vicinity of the plug-in interface and the limiting round rod is inserted into the plug-in interface through the connecting frame 211, so that the connecting frame 211 is fixed on the side of the horizontal frame 1 away from the punching frame 31. At this time, the telescopic cylinder 12 is started so that its telescopic end drives the resistance block to move, and the resistance block drives the adjustment plate 13 to rotate around the hinge during the movement. At this time, there is a certain angle between the adjustment plate 13 and the horizontal frame 1, and then the counterweight block 32 is moved down along the punching frame 31. During the downward movement of the counterweight block 32, the punching head 33 can push the impact block 11 toward the anti-collision guard During the movement of the electric slider 42, the infrared rangefinder 4 is driven to move. If the measured distances of the infrared rangefinder 4 in each time period of a single stroke of the electric slider 42 are the same, it indicates that the anti-collision guardrail 100 has not been deformed or the deformation is within the allowable range. Otherwise, the anti-collision guardrail 100 has been deformed. At this time, the indication of the electronic pressure gauge is read, which is also the minimum impact force for the deformation of the anti-collision guardrail 100.

[0078] In addition, similar to the steps of Example 1, the impact test of the anti-collision guardrail 100 at this position with an inclined upward force can be performed by respectively changing the deflection angle of the anti-collision guardrail 100 in the vertical plane, changing the angle of the stamping machine frame 31, and changing the mass of the counterweight block 32, thereby controlling a single variable and making the impact test effect of the anti-collision guardrail 100 more representative.

[0079] Embodiment three, on the basis of embodiment two, by simultaneously changing the deflection angle of the anti-collision guardrail 100 in the vertical plane and changing the angle of the punch frame 31, or simultaneously changing the deflection angle of the anti-collision guardrail 100 in the vertical plane and changing the mass of the counterweight 32, or changing the angle of the punch frame 31 and changing the mass of the counterweight 32, etc., the only two variables can be controlled, and then the anti-collision guardrail 100 at that position can be impact tested with an inclined upward force, so that the impact test effect of the anti-collision guardrail 100 is more representative.

[0080] In addition, by simultaneously changing the deflection angle of the anti-collision guardrail 100 in the vertical plane, changing the angle of the stamping machine frame 31, and changing the mass of the counterweight block 32, the three variables are changed at the same time, and the anti-collision guardrail 100 at this position can be impact tested with an inclined upward force, making the impact test effect of the anti-collision guardrail 100 more representative.

[0081] Embodiment 4, referring to Figure 7 A plurality of mutually clamped extension plates 311 are detachably mounted on one end of the punching frame 31 away from the horizontal frame 1 .

[0082] The length of the punch frame 31 can be changed by the clipped extension plate 311, and then the height of the counterweight block 32 can be changed instead of changing the weight of the counterweight block 32, so that the same counterweight block 32 has different gravitational potential energies, and more ways of having different gravitational potential energies are provided.

[0083] Finally, refer to Figure 8 The present invention also provides an impact test method for an anti-collision guardrail, and the method of using the method comprises the following steps: S1: placement processing, clamping the anti-collision guardrail 100 inside the placement rack 2.

[0084] S2: Configuration selection, select a punch head 33 of a suitable area, select a suitable number of counterweight connecting blocks 322, and then change the inclination angle of the punch frame 31 and the rotation angle of the anti-collision guardrail 100.

[0085] S3: Impact test, by changing the deflection angle of the anti-collision guardrail 100 in the vertical plane, changing the angle of the punch frame 31 and changing the mass of the counterweight block 32, the counterweight block 32 is allowed to slide freely downward along the horizontal frame 1 and the anti-collision guardrail 100 is impact tested through the punch head 33 to obtain the impact test data of the anti-collision guardrail 100 under different states.

[0086] S4: Detection processing, using the infrared rangefinder 4 to detect whether the anti-collision guardrail 100 is deformed after the impact test.

[0087] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0088] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An impact test device for a crash barrier, comprising a horizontal frame (1), characterized in that: A placement frame (2) for placing the anti-collision guardrail (100) and an impact mechanism (3) for applying an external force to the anti-collision guardrail (100) are sequentially mounted on the horizontal frame (1), wherein: The placement rack (2) is detachably mounted on the horizontal rack (1); The impact mechanism (3) comprises: The punching frame (31) is mounted on the horizontal frame (1) via a hinge shaft, and a counterweight block (32) is slidably arranged on the horizontal frame (1); A punch head (33) is mounted on a side of the counterweight (32) close to the placement rack (2); An adjustment assembly (34) is mounted on the horizontal frame (1) and is used to adjust the angle of the punching frame (31); An infrared rangefinder (4) is installed on one side of the placement rack (2) away from the punching machine frame (31).

2. The impact testing device for a crash barrier according to claim 1, characterized in that: The placement rack (2) comprises a transverse plate (21) extending along the width direction of the horizontal frame (1), and vertical plates (22) are symmetrically installed on the transverse plate (21) along its length direction, and placement grooves for clamping with the anti-collision guardrail (100) are provided on the opposite surfaces of the vertical plates (22).

3. The impact testing device for a crash barrier according to claim 2, characterized in that: The horizontal frame (1) is provided with a connecting frame (211) matched with the transverse plate (21), and a swing shaft (212) is installed on the connecting frame (211) through a bearing, and the transverse plate (21) is installed on the swing shaft (212), and limit rods (213) are slidably arranged at both ends of the transverse plate (21), and the horizontal frame (1) is provided with two groups of limit grooves (214) distributed along the circumference of the swing shaft (212) and matched with the corresponding side limit rods (213).

4. The impact testing device for a crash barrier according to claim 1, characterized in that: The placement rack (2) is provided with a telescopic rack (41) matched with the infrared rangefinder (4), the telescopic rack (41) is provided with an electric slide block (42), and the infrared rangefinder (4) is provided on the electric slide block (42).

5. The impact testing device for a crash barrier according to claim 1, characterized in that: The counterweight block (32) is evenly provided with a plurality of counterweight grooves (321) along the length direction of the punching machine frame (31), and a counterweight connecting block (322) is arranged inside the counterweight groove (321).

6. The impact testing device for a crash barrier according to claim 1, characterized in that: The punching head (33) comprises a fixing frame (332) connected to the counterweight (32), and the punching head (33) is installed at one end of the fixing frame (332) away from the counterweight (32).

7. The impact testing device for a crash barrier according to claim 6, characterized in that: The punching head (33) is mounted on a fixing frame (332) via a hinge, and a plurality of punching connecting plates (331) which are mutually clamped and used to expand the area of ​​the punching head (33) are arranged on the side wall of the punching head (33).

8. The impact testing device for a crash barrier according to claim 1, characterized in that: The adjustment component (34) comprises: A supporting frame (341) is mounted on the horizontal frame (1); An adjusting block (342) is slidably arranged on the supporting frame (341); a limiting column (343) is slidably arranged on the adjusting block (342); and a plurality of limiting holes (344) matching with the limiting columns (343) are evenly opened on the supporting frame (341) along its length direction; The adjusting frame (345) is mounted on the adjusting block (342) via a hinge, and one end of the adjusting frame (345) away from the adjusting block (342) is mounted on the punching machine frame (31) via a hinge.

9. The impact testing device for a crash barrier according to claim 8, characterized in that: The support frame (341) is provided with indication lines (346) corresponding one to one with the limiting holes (344), and the adjustment block (342) is provided with a reference line (347) matching with the limiting column (343).

10. An impact test method for a crash barrier, comprising an impact test device for a crash barrier according to any one of claims 1 to 9, characterized in that: The method of use includes the following steps: S1: placing the anti-collision guardrail (100) in the placing frame (2); S2: Configuration selection, selecting a punch head (33) of a suitable area, selecting a suitable number of counterweight connecting blocks (322), and then changing the inclination angle of the punch frame (31) and the rotation angle of the anti-collision guardrail (100); S3: impact test, allowing the counterweight (32) to slide freely downward along the horizontal frame (1) and perform an impact test on the anti-collision guardrail (100) through the punch head (33); S4: Detection processing, using an infrared rangefinder (4) to detect whether the anti-collision guardrail (100) is deformed after the impact test.

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